CA2112212C - Broach apparatus - Google Patents
Broach apparatusInfo
- Publication number
- CA2112212C CA2112212C CA002112212A CA2112212A CA2112212C CA 2112212 C CA2112212 C CA 2112212C CA 002112212 A CA002112212 A CA 002112212A CA 2112212 A CA2112212 A CA 2112212A CA 2112212 C CA2112212 C CA 2112212C
- Authority
- CA
- Canada
- Prior art keywords
- annular
- arbor
- inserts
- annular members
- members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B43/00—Boring or drilling devices able to be attached to a machine tool, whether or not replacing an operative portion of the machine tool
- B23B43/02—Boring or drilling devices able to be attached to a machine tool, whether or not replacing an operative portion of the machine tool to the tailstock of a lathe
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/16—Rectilinear broach
- Y10T407/1628—Rectilinear broach including holder having seat for inserted tool
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T407/00—Cutters, for shaping
- Y10T407/16—Rectilinear broach
- Y10T407/1671—Plural tooth groups
Abstract
A shell-type internal broach assembly including a number of annular insert mounting shells interleaved with a number of annular spacers, and mounted on an arbor. The annular insert mounting shells are sufficiently short so as to permit the use of travelling-wire EDM
manufacturing methods. As a result, inserts can be precisely and accurately located and secured to the annular insert mounting shells, thereby presenting a highly repeatable broaching configuration to a workpiece. The precision by which the annular insert mounting shells are formed also promotes concentricity of the annular insert mounting shells, which further promotes the accurate and precise placement of the inserts relative to the longitudinal axis of the arbor. The use of the annular spacers also effectively reduces the cost of the internal broach assembly, in that the simple cylindrical outer surface of the annular spacers are less expensive to manufacture than the complex surface features necessary to accurately receive the inserts on the periphery of the annular insert mounting shells.
The number and length of the annular spacers used can be varied in according with the strength required by the inserts to resist deformation by the cutting forces.
manufacturing methods. As a result, inserts can be precisely and accurately located and secured to the annular insert mounting shells, thereby presenting a highly repeatable broaching configuration to a workpiece. The precision by which the annular insert mounting shells are formed also promotes concentricity of the annular insert mounting shells, which further promotes the accurate and precise placement of the inserts relative to the longitudinal axis of the arbor. The use of the annular spacers also effectively reduces the cost of the internal broach assembly, in that the simple cylindrical outer surface of the annular spacers are less expensive to manufacture than the complex surface features necessary to accurately receive the inserts on the periphery of the annular insert mounting shells.
The number and length of the annular spacers used can be varied in according with the strength required by the inserts to resist deformation by the cutting forces.
Description
2~ 122 1 '~
BROACII APPARATUS
BACKGROUND OF THE INVENTION
1. PIELD OF TIIE INVENTION
The pre~ent inventlon generally relates to broachlng -~chlnary, auch as the type u~ed to broach large diameter internal ~hapes, which - -~
includes an arbor with slot~ or the ll~e formed ln lts outer ~urface or in a shell fltted over the arbor for receiving a number of broaching lnserts.
More specifically, this inventlon relate~ to suoh a broach apparatu~ wherein ~ -the slots are preclsion formed ln a number of annular i - ~ whose axLal lengths are sufflclently ~hort to permlt manufacture of the annular member~
by electrical dlscharge machlning (EDM) technologles,'~o as to result in a more accurate and highly repeatable placement of the inserts relative to the arbor and, therefore, relative to a workpiece.
2. DESCRIPTION OF THE PRIOR ART
VarLou~ types of internal shape-type broaches h~ve been developed over the years for the purpose of ~~Ah~nlng splines and varlous other forms on workpleces whose configuration~ permlt a broach to ba passed completsly through the workpiece. Early forma of ~uch broaches include ~olld broache~
formed from one-piece bar stock, which typlcally have a number of lntegrally-formed teeth. More recently, shell internal broa¢hes have been devaloped, which differ from solid broache~ in that they include teeth formed on, or in~erts mounted to, a removable shell secured on an arbor.
Shell internal broache~ are ~uperior to solid broaches with respect to the ability to replace only the shell lnstead of the entire broach when the teeth or inserts are worn or damaged. However, solld broaches are generally able to provide greater dimensional accuracy and concentricity than shell internal broaches, due to normal dimensional variations being _ r,; ~ed by the additional number of piece~ required for ~hell lnternal broa¢he~. -A convantion~l shell lnternal broach is shown in Figures 1 and 2.
Generally, one or more tubular-shaped shells 12 are mounted on an arbor 10 80 as to abut an enlarged portion 22 at one end of the arbor. The shells 12 ~,:
2~22~2 are secured to the arbor 10 with a nut 26 threaded onto a threaded portion 24 located at an end of the arbor 10 oppoeite the enlarged portlon 22. Each ~hell 12 servea to secure a ~et of broaching lnserts 16 on thelr periphery, auch that each set of broaching inaert~ 16 ls separately mounted to the arbor 10. Accordingly, the ability to remove one of the ~hell~ 12 and replace it wlth another having new or reground broaahing ln~ert~ 16, whioh are of a different diameter and/or a different configuration, provida~ a versatility which iB not po~sible with solid broaches.
The broaching inserts 16 are received in a corresponding number of qround clot~ 14 or other preci~ion manufactured ~hape~ formed ~n the peripharal ~urface of the ~hells 12. The broaching inaerts 16 may bs secured in the slots 14 with fasteners, ~uch as the bolt~ 18 chown or locking wedge~ (not ~hown), a~ i8 known in the art. Preferably, a ~erieu of ~having rings 20 are also mounted on the arbor 10 behind the broaching in~erts 16, ~uch that the shaving rings 20 perform wor~ on a workpieae after the broaching insert~ 16 have completed their work, ~o a~ to remove error~
of form introduaed into the workpiece by the broaching in~ert~ 16.
. .:
Ac noted above, ~hell internal broaches of the type shown in . :.
Flgurec 1 and 2 have a ~ignlficant chortcoming in that dimen~lonal accuracy and concentricity are lece than that of eolid broaches ae a recult of their additional number of . ~rt~. Thic ls true even though precielon --ch~ n~ ng and grinding operations are employed to form the slots 14 on the shell~ 12. 8acause of this, ~hell internal broaches conatructed in accordance with the prior art are relatively expensive to manufacture, due to the additlonal,-expen~ive and t~ coo~_ ~ng manufacturinq operat-ons required to sufficiently achieve the preclsion de~ired of tha chells 12 and slot~ 14. The co~ts associated with ehell internal broache~ are further increased by expenses incurred in thsir maintenance, ~uch as the need to regrlnd the shells 12 and alots 14 as they hecome worn or ~~~~ged. ~ -Further, the machining andtor grinding operation~ necessitated by the shell internal broaches taught in the prior art do not lend themselves 2 ~ ~ 22 ~ 2 --to exi~ting automated or numerically-cont~olled machining technologies, 0uch as electrical di~charge machlning (EDM) technologies, and ln particular, travelling-wire EDM Sechnologies. Travelling-wire EDM i~ a hlghly ds~lrable manufacturing method in that accuracies of about +/-0.013 mm (+/-0.0005 S inche~ are readily achievable, with accuracle~ of better than about +/-0.005 mm (+/-0.0002 inches) being poe0ible. Howsver, the 0hells 12 u~ed by the prior art are prohibitively long to permit the u~e of txaYelllng-wlre EDM technologie~. As a re~ult, the ~hells 12 and ~lots 14 mu~t typlcally be ground to 0i~e, which 10 generally less preal~e than travelllng-wlre EDM.
Accordingly, what i0 needed is an lnternal broach apparatu~ whlch 10 capable of dimen~ional accuracie~ and concentri¢ltie~ comparablu to that ~-of solld broaches, yet retalns the ver0atllity and interchAngeAhlllty of ~hell lnternal broache~. It would al~o be desirable that such an intsrnal broach provlde reduced manufacturlng and maintenance co~tc, a~ compared to prlor art shell lnternal broaches, whlle permlttlng the u~e of modern -~h~n~ng technologle~, 0uch a~ numerlcally-controlled travelllng-wlre EDM
operations. , SUMMA~ OF THE INVENTION
According to the pre0ent lnvention there 10 provided a ~hell-type internal broach a0~embly whlch include~ a number of annular ~hell~ whlch are significantly shorter than that taught by the prlor art. AB a re~ult, the annular ~hells can be manufactured u~lng travell$ng-wlre EDM tschnologie~
The annular ~hells are lnterleaved wlth a number of annular ~pacers and ~h mounted on an arbor. The annular nhells are preci~ion-formed ~o as to accurately locate broaching ln~ert~ secured thereto, and thereby present a highly repeatable broaching configuration to a workpiece. The precialon by which the annular ~hell~ can be formed wlth travelling-wlre EDM permit~ the ~;
annular shell0 to be ~paced apart by the annular spacers along the length of the arbor, while malntalnlng concentrlclty of the annular shells and accuracy by which the in~erts are located relative to the longltudlnal axl~
of the arbor.
2112~1~
Each of the annular ~hella of thl6 inventlon have at least one receptacle formed on its periphery. The annular shell~ are then aligned on the arbor ~o as to align each of the receptacles, which together deflne a segmented elongate alot extending ~ubstantially longitudlnally along the length of the arbor. The annular spacers are mounted on the arbor such that at least one of the annular ~pBcera i8 di~posed betw~en ~t least one ad~acent pa$r of annular shells. The outer dlameter of the annular ~pacers i~ le~s than the outar diameter of the annular ~hells when mea~ured at ths receptaale, ~uch that the elongate slot i~ se~_ ~ted but not interrupted by the annular spacers. Each of the annular shells and annular ~pacers are retained on the arbor by a ~uitable device, such aB a nut threadably mounted on the arbor.
In a preferred : 'c-~r--nt, the lnserts are elongate, ~uch that two lnsert~, placed end to end, will fill the entire length of the elongate slot formed by the allgned receptacles in the annular ~hells. The number and axial ~pacing of the annular ~hells on the arbor determines the length of the segmented elongate ~lot, while the number of ~-_ Led elongate ~lots dete I n~ the number of lnserts which the annular ~hells are capable of supporting . ,:
Accordlng to a preferred aspect of this lnvention, the preclslon ;~
by whlch the annular ~hells are manufactured is significantly 1 _:o~d through the use of travelling-wire EDM technologie~. As a rq~ult, the precision, accuracy and repeatabllity by which the receptacles are formed in the annular shells, as well as the concentriclty of the annular shell~, are slgnificant1y ~l oved. Consequently, the shell broachlng apparatus of thla lnvention is capable of presentlng a highly repeatable broaching conflguratlon to a workplece.
In additlon, the shell broaching apparatu~ of thls lnvention retalns the aforementioned advantages associated with shell broaches, namely, lnterchangeability and versatllity to allow the annular ~hells to be readily replaced with other annular shells having a different diameter and/or configuration.
, '. ' ' ~ ' ' ' ' ' ' ' ' ' . ' ~ ' ' ~ . . .
~ ' ;
21~21~
Another significant advantage of this lnvention 1~ that the uae of the annular spacers effectlvely reduces the cost of the ~hell lnternal broach apparatus, ln that the simple cyllndrical outer ~urface of'the annular spacers are le~s expen~ive to manufactuxe than the complex ~urface featurQs nocs~sAry to accurately receive the inserts on the periphery of the annular ~hells. Furthermore, the number and length of the annular spacer~
used may be varied in accordanae wlth the strength requlred by the insert~
to re~i~t deformation by the cutting forces. The annular ~pacerc al~o facilitate chip removal durlng the operation of the~shell internal broach apparatus, in that the ~pace provided by the annular ~pacer~ between ad~acent annular ~hells can acc ~~te the chips and swarf generated by the broaching procea~
Accordlngly, it 1~ an ob~ect of the preaent lnventlon to provide a broaching apparatus who~e con~truction promotes the dimen~ional preclslon oP
the broachlng apparatus, ~o as to enable the broachlng apparatu~ to pre~ent a hlghly repeatable broaching configuration to a workpiece.
It is a further ob~ect of the invention that the broaching apparatus be a ahell-type internal broachlng apparatu~ havlng a number of annular innert mounting ~hell~, each of which are readily removable from an arbor to permit repla-: - t with other annular ln~ert mounting shell0.
It ia ~till a further ob~ect of the invention that the broaching ~-apparatus include a number of annular ~pacer~ posltioned between ad~acent palrs of annular insert mountlng ahells.
It la another ob~ect of the inventlon that the broaching apparatus enable the use of automated or numerically-controlled travelllng-~wire EDM
technologles, which promota the preclslon, accuracy and repeatabllity by whlch the ln~ert receptacles are formed ln the annular lnsert mounting shells, as well a~ the concentriclty of tha annular ln~ert mounting ~hells.
It la yet another ob~ect of the invention that the number and length of the annular spacer~ may be varied to meet th~ ~trength requlred by the inaert~ in order to re~l~t deformation by the cutting forces.
Other ob~ect~ and advantage~ of thl~ inventlon wlll become more apparent after a reading of the following detailed de~cription taken ln con~unction with the drawlng~ provided.
BRIEF DESCRIPTION OF THE DRAWINGS
Flgure 1 i8 a cide vLew of a ~hell internal broachlng au~embly known in the prior artS
Figure 2 i~ a tran~ver~e cro~s-~ectional view taken along line 2-2 of Flgure 1;
Figure 3 1~ a partial croaa-~ectional ~ide view of a ~hell internal broaching a~cembly con~tructed ln accordance with a preferred of thic invention;
Figure 4 i~ a cro~ ectlonal view taken along llne 4-4 of Flqure ~
BROACII APPARATUS
BACKGROUND OF THE INVENTION
1. PIELD OF TIIE INVENTION
The pre~ent inventlon generally relates to broachlng -~chlnary, auch as the type u~ed to broach large diameter internal ~hapes, which - -~
includes an arbor with slot~ or the ll~e formed ln lts outer ~urface or in a shell fltted over the arbor for receiving a number of broaching lnserts.
More specifically, this inventlon relate~ to suoh a broach apparatu~ wherein ~ -the slots are preclsion formed ln a number of annular i - ~ whose axLal lengths are sufflclently ~hort to permlt manufacture of the annular member~
by electrical dlscharge machlning (EDM) technologles,'~o as to result in a more accurate and highly repeatable placement of the inserts relative to the arbor and, therefore, relative to a workpiece.
2. DESCRIPTION OF THE PRIOR ART
VarLou~ types of internal shape-type broaches h~ve been developed over the years for the purpose of ~~Ah~nlng splines and varlous other forms on workpleces whose configuration~ permlt a broach to ba passed completsly through the workpiece. Early forma of ~uch broaches include ~olld broache~
formed from one-piece bar stock, which typlcally have a number of lntegrally-formed teeth. More recently, shell internal broa¢hes have been devaloped, which differ from solid broache~ in that they include teeth formed on, or in~erts mounted to, a removable shell secured on an arbor.
Shell internal broache~ are ~uperior to solid broaches with respect to the ability to replace only the shell lnstead of the entire broach when the teeth or inserts are worn or damaged. However, solld broaches are generally able to provide greater dimensional accuracy and concentricity than shell internal broaches, due to normal dimensional variations being _ r,; ~ed by the additional number of piece~ required for ~hell lnternal broa¢he~. -A convantion~l shell lnternal broach is shown in Figures 1 and 2.
Generally, one or more tubular-shaped shells 12 are mounted on an arbor 10 80 as to abut an enlarged portion 22 at one end of the arbor. The shells 12 ~,:
2~22~2 are secured to the arbor 10 with a nut 26 threaded onto a threaded portion 24 located at an end of the arbor 10 oppoeite the enlarged portlon 22. Each ~hell 12 servea to secure a ~et of broaching lnserts 16 on thelr periphery, auch that each set of broaching inaert~ 16 ls separately mounted to the arbor 10. Accordingly, the ability to remove one of the ~hell~ 12 and replace it wlth another having new or reground broaahing ln~ert~ 16, whioh are of a different diameter and/or a different configuration, provida~ a versatility which iB not po~sible with solid broaches.
The broaching inserts 16 are received in a corresponding number of qround clot~ 14 or other preci~ion manufactured ~hape~ formed ~n the peripharal ~urface of the ~hells 12. The broaching inaerts 16 may bs secured in the slots 14 with fasteners, ~uch as the bolt~ 18 chown or locking wedge~ (not ~hown), a~ i8 known in the art. Preferably, a ~erieu of ~having rings 20 are also mounted on the arbor 10 behind the broaching in~erts 16, ~uch that the shaving rings 20 perform wor~ on a workpieae after the broaching insert~ 16 have completed their work, ~o a~ to remove error~
of form introduaed into the workpiece by the broaching in~ert~ 16.
. .:
Ac noted above, ~hell internal broaches of the type shown in . :.
Flgurec 1 and 2 have a ~ignlficant chortcoming in that dimen~lonal accuracy and concentricity are lece than that of eolid broaches ae a recult of their additional number of . ~rt~. Thic ls true even though precielon --ch~ n~ ng and grinding operations are employed to form the slots 14 on the shell~ 12. 8acause of this, ~hell internal broaches conatructed in accordance with the prior art are relatively expensive to manufacture, due to the additlonal,-expen~ive and t~ coo~_ ~ng manufacturinq operat-ons required to sufficiently achieve the preclsion de~ired of tha chells 12 and slot~ 14. The co~ts associated with ehell internal broache~ are further increased by expenses incurred in thsir maintenance, ~uch as the need to regrlnd the shells 12 and alots 14 as they hecome worn or ~~~~ged. ~ -Further, the machining andtor grinding operation~ necessitated by the shell internal broaches taught in the prior art do not lend themselves 2 ~ ~ 22 ~ 2 --to exi~ting automated or numerically-cont~olled machining technologies, 0uch as electrical di~charge machlning (EDM) technologies, and ln particular, travelling-wire EDM Sechnologies. Travelling-wire EDM i~ a hlghly ds~lrable manufacturing method in that accuracies of about +/-0.013 mm (+/-0.0005 S inche~ are readily achievable, with accuracle~ of better than about +/-0.005 mm (+/-0.0002 inches) being poe0ible. Howsver, the 0hells 12 u~ed by the prior art are prohibitively long to permit the u~e of txaYelllng-wlre EDM technologie~. As a re~ult, the ~hells 12 and ~lots 14 mu~t typlcally be ground to 0i~e, which 10 generally less preal~e than travelllng-wlre EDM.
Accordingly, what i0 needed is an lnternal broach apparatu~ whlch 10 capable of dimen~ional accuracie~ and concentri¢ltie~ comparablu to that ~-of solld broaches, yet retalns the ver0atllity and interchAngeAhlllty of ~hell lnternal broache~. It would al~o be desirable that such an intsrnal broach provlde reduced manufacturlng and maintenance co~tc, a~ compared to prlor art shell lnternal broaches, whlle permlttlng the u~e of modern -~h~n~ng technologle~, 0uch a~ numerlcally-controlled travelllng-wlre EDM
operations. , SUMMA~ OF THE INVENTION
According to the pre0ent lnvention there 10 provided a ~hell-type internal broach a0~embly whlch include~ a number of annular ~hell~ whlch are significantly shorter than that taught by the prlor art. AB a re~ult, the annular ~hells can be manufactured u~lng travell$ng-wlre EDM tschnologie~
The annular ~hells are lnterleaved wlth a number of annular ~pacers and ~h mounted on an arbor. The annular nhells are preci~ion-formed ~o as to accurately locate broaching ln~ert~ secured thereto, and thereby present a highly repeatable broaching configuration to a workpiece. The precialon by which the annular ~hell~ can be formed wlth travelling-wlre EDM permit~ the ~;
annular shell0 to be ~paced apart by the annular spacers along the length of the arbor, while malntalnlng concentrlclty of the annular shells and accuracy by which the in~erts are located relative to the longltudlnal axl~
of the arbor.
2112~1~
Each of the annular ~hella of thl6 inventlon have at least one receptacle formed on its periphery. The annular shell~ are then aligned on the arbor ~o as to align each of the receptacles, which together deflne a segmented elongate alot extending ~ubstantially longitudlnally along the length of the arbor. The annular spacers are mounted on the arbor such that at least one of the annular ~pBcera i8 di~posed betw~en ~t least one ad~acent pa$r of annular shells. The outer dlameter of the annular ~pacers i~ le~s than the outar diameter of the annular ~hells when mea~ured at ths receptaale, ~uch that the elongate slot i~ se~_ ~ted but not interrupted by the annular spacers. Each of the annular shells and annular ~pacers are retained on the arbor by a ~uitable device, such aB a nut threadably mounted on the arbor.
In a preferred : 'c-~r--nt, the lnserts are elongate, ~uch that two lnsert~, placed end to end, will fill the entire length of the elongate slot formed by the allgned receptacles in the annular ~hells. The number and axial ~pacing of the annular ~hells on the arbor determines the length of the segmented elongate ~lot, while the number of ~-_ Led elongate ~lots dete I n~ the number of lnserts which the annular ~hells are capable of supporting . ,:
Accordlng to a preferred aspect of this lnvention, the preclslon ;~
by whlch the annular ~hells are manufactured is significantly 1 _:o~d through the use of travelling-wire EDM technologie~. As a rq~ult, the precision, accuracy and repeatabllity by which the receptacles are formed in the annular shells, as well as the concentriclty of the annular shell~, are slgnificant1y ~l oved. Consequently, the shell broachlng apparatus of thla lnvention is capable of presentlng a highly repeatable broaching conflguratlon to a workplece.
In additlon, the shell broaching apparatu~ of thls lnvention retalns the aforementioned advantages associated with shell broaches, namely, lnterchangeability and versatllity to allow the annular ~hells to be readily replaced with other annular shells having a different diameter and/or configuration.
, '. ' ' ~ ' ' ' ' ' ' ' ' ' . ' ~ ' ' ~ . . .
~ ' ;
21~21~
Another significant advantage of this lnvention 1~ that the uae of the annular spacers effectlvely reduces the cost of the ~hell lnternal broach apparatus, ln that the simple cyllndrical outer ~urface of'the annular spacers are le~s expen~ive to manufactuxe than the complex ~urface featurQs nocs~sAry to accurately receive the inserts on the periphery of the annular ~hells. Furthermore, the number and length of the annular spacer~
used may be varied in accordanae wlth the strength requlred by the insert~
to re~i~t deformation by the cutting forces. The annular ~pacerc al~o facilitate chip removal durlng the operation of the~shell internal broach apparatus, in that the ~pace provided by the annular ~pacer~ between ad~acent annular ~hells can acc ~~te the chips and swarf generated by the broaching procea~
Accordlngly, it 1~ an ob~ect of the preaent lnventlon to provide a broaching apparatus who~e con~truction promotes the dimen~ional preclslon oP
the broachlng apparatus, ~o as to enable the broachlng apparatu~ to pre~ent a hlghly repeatable broaching configuration to a workpiece.
It is a further ob~ect of the invention that the broaching apparatus be a ahell-type internal broachlng apparatu~ havlng a number of annular innert mounting ~hell~, each of which are readily removable from an arbor to permit repla-: - t with other annular ln~ert mounting shell0.
It ia ~till a further ob~ect of the invention that the broaching ~-apparatus include a number of annular ~pacer~ posltioned between ad~acent palrs of annular insert mountlng ahells.
It la another ob~ect of the inventlon that the broaching apparatus enable the use of automated or numerically-controlled travelllng-~wire EDM
technologles, which promota the preclslon, accuracy and repeatabllity by whlch the ln~ert receptacles are formed ln the annular lnsert mounting shells, as well a~ the concentriclty of tha annular ln~ert mounting ~hells.
It la yet another ob~ect of the invention that the number and length of the annular spacer~ may be varied to meet th~ ~trength requlred by the inaert~ in order to re~l~t deformation by the cutting forces.
Other ob~ect~ and advantage~ of thl~ inventlon wlll become more apparent after a reading of the following detailed de~cription taken ln con~unction with the drawlng~ provided.
BRIEF DESCRIPTION OF THE DRAWINGS
Flgure 1 i8 a cide vLew of a ~hell internal broachlng au~embly known in the prior artS
Figure 2 i~ a tran~ver~e cro~s-~ectional view taken along line 2-2 of Flgure 1;
Figure 3 1~ a partial croaa-~ectional ~ide view of a ~hell internal broaching a~cembly con~tructed ln accordance with a preferred of thic invention;
Figure 4 i~ a cro~ ectlonal view taken along llne 4-4 of Flqure ~
3; ;
Figure 5 i~ a cross-nectional view taken along ll~e 5-5 of Figure 3;
Flgure 6 ic a cro~-cectional view of an annular incert mountlng chell u~ed to support an end of a broaching insertt ~
Figure 7 in a cLo~n a~_Lional view of an annular ln~ert -~ g --shell uced to cupport an inte '~te portion of a broaching in~ert~
Figure 8 is a cross-cectional side vlew taken along line 8-8 of both Figure~ 6 and 7~ and Figure 9 i8 a ~ide view of a broaching in~ert.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to Figure 3, there i~ ~hown in partlal cro~-cection a ~ide view of a ~hell lnternal broach ac~embly 28 in accordance with a preferred ~ r--nt of thi~ lnvention, with varlou~
feature~ of the ~hell internal broach an~embly 28 being illustrated ln Figures 4 through 9. Ac illu~trated, the chell lnternal broach a~sembly 28 include~ a pulling arbor 10 which i~ sub~tantially ~imllar to the arbor 10 chown in Figure~ 1 and 2 of the prior art. In contras~ to the prior art ~hell internal broach ac~embly illu~trated in Figure~ 1 and 2, the ~hell ~ ' 2~12t~12 . ~ ~
internal broach a~sembly 28 of thl~ invention ha~ a number of annular-ehaped in~ert mounting ~hells whlch are formed to receLve a number of broaching in~erts 16, as shown in Figures 3 through S.
The annular insert mounting shells are ~ s~ of a ~et of end S annular shells 34, a~ ~hown in Figure 6, and a set of int~ ate annular shell~ 36, as ~hown ln Figure 7. A~ bast seen ln Flgure 8, the end annular shell~ 34 and the intermediAte annular ~hell~ 36 hava the ~ame cros~-sectional aonflguratlon. The end annular shells 34 and the int~ te annular shell~ 36 have formed ln their re~pect1ve peripherie~
an identical number of ~lot~ 42. In accordance witL thln inventlon, the ; ~;~
intermed1ate annular shell~ 36 and the end annular shells 34 are ~
annular-shaped, having an axial length whlch is lenn than their outer ~; ;diameters. Beaause of their shorter axial length~, the end annular shells 34 and the intsrmed~ate annular shells 36 can be m~chined u~ing -electronically-controlled ra~h~n~ng equl, - ~, such as numerical controlled (NC) EDN equlpment ~not ~hown), and more preferably, travelllng-wire EDM
equipment. Such technologies are within the 8Cope of those skilled in thu art, and will not be de~cribed in further detail.
By us1ng travelling-wire EDM manufacturing methods, the prof11e~
of the end and inte ~Ate annular shells 34 and 36 can be more accurately produced with higher repeatability, 80 as to provide a more acaurate and preci~e placement of the broaching in~ert~ 16 relative to the puliing arbor 10. In addltlon, travellLng-wire EDM methods can be used to form precisely-located alignment holes 50 ln th2 and and intermedlate annular shellM 34 and 36. The allgnment hole~ 50 are used durlng assembly of the shell lnternal broach as~embly 28 to axially allgn the end annular shell~ 34 and the lntermediate annular shell~ 36 relatlve to each other on the pulllng arbor 10.
When properly aligned with each other, the ~lotc 42 in the end annular shells 34 and the lnt~ 'iate annular shells 36 define a coLL6~0nding number of segmented elongate slots extendlng along the axial 2 ~ 1 2 2 ~
length of the pulling arbor 10. Each of the segmented elongate ~lotq 1~
slzed to acc -'~te at lea~t one broaahlng inqert 16, a~ ~hown Ln Figures 4, 5 and 9. The broaching lnaert~ 16 have lower portlon~ 48 recelvable ln the slotq 42 of the end and in~ Ate annular ahell~ 34 and 36, curh that a number of cut~ers 30 pro~ect radially from the end and lnt~ te annular shells 34 and 36, a~ aeen ln Flgureq 4 and 5.
In a preferred embodlment, each of the ~egmentsd elongate ~lots are sufflclently long ~o aa to ac~~ te two broaching in~ertc 16 whlch are elongate and lying end to end, aa ~hown ln Figu~e 3. Accordlngly, the lQ ahell internal broach a~qembly 28 l~ apportioned lnto,two broachlng ~-sectlon~. Each broachlng inaert 16 provlde~ a gradual but cont~n~on~ taper ~, to the broachlng conf~guration dlameter deflned by the radlally outward edge of dlametriaally opposed broaching inaert~ 16. ~hlle lt l~ preferred that ~-~
the broaching inserts 16 be elongate for practicing this invcntion, it i~
fore~eeable that one ~kllled in the art could greatly vary the aize and length of the broaahlng lnserts.
Aa ~een ln Figurea 6 and 7, the end annular chells 34 are aubatantially wider than the lnt~ te annular ahell~ 36 ~o a~ to AC_ 'ote two threaded bore~ 38 and 40 provlded at the bottom of each slot 42, while a ~lngle threaded bore 46 ic formed in the bottom of each alot 42 ln the lnt~ te annular ~hellq 36. Each of the threaded bore~ 38, 40 and 46 recelve~ a threaded fa~tener, ~uch a~ the boltn 18 shown in Figure 4.
Each broaching ln~ert 16 has a plurallty of mountlng bore~, auch a~ the four counteraunk mountlng bore~ 44 ~hown ln Flgure 9. One countersunk mountlng bore 44 l~ provlded at each end of the broachlng in~ert 16, while other mountlng borea 44 are located at equally ~paced lnt~ te locatlon~ a~ ehown. Two bolt~ 18 secure the ends of each broaching in~ert 16 to a co.~eayonding end annular shel1 34 through the coL.euyonding pair of the counter~unk mounting bore~ 44, whlle additlonal bolta 18 ~ecure lnt~ ate portionq of each broaching ln~art 16 to an approprlate number of lnte ~'~ate annular ~hellq 36, two aq lllustrated, through correapondlng 2~2~2 counter~unk mounting bore~ 44. The combinatlon of ~paclng the countersunk mountLng bore~ 44 on the broachlng ln~ertc 16 and the ~hort axLal lengths of the end and int~ 'iAte annular ~hell~ 34 and 36 re~ult~ in the end and int~ te annular ~hellc 34 and 36 belng axially cpaced apart along the length of the pulllng arbor 10. Tho~e ~killed in the art w111 recogn~e that the amount of lnte -~ te support requlred for the broaching lnaert~ ;~
16 wLll depend on the length of the broaching in~ert~ 16 and the deformatlon loads imposed by the broachlng operation. Accordl~gly, fewer or more intq -~l~te annular ~hells 36 may be reguired to ~ufficiently ~upport the lntermedlate portlons of the broachlng ln~ert~ 16.
Annular spacerc 32, shown in cro~ ection in Flgure 5, are slzed to have an axlal length which allows the annular upacer~ 32 to fit between ad~acent end and lnt~ - ;ate annular ~hell~ 34 and 36. The outer eurfacs 52 of the annular ~pacer~ 32 has an outer dlameter which lc ~llghtly lec~
than the dlameter deflned between the bottom of dlametrlcally-oppo~ed ~lots 42 on the end and lntermediate annular ~hell~ 34 and 36. Beca~-~e the outer surface 52 of the annular ~pacer~ 32 i~ ~paced radlally lnward from the lower portion 48 of the broaching lnserts 16 and, therefore, doe~ not lnterfere with the broaching ln~erts 16 when mounted in the ~lots 42, no critlcal or precl~ion grlndlng or --h~n~ng 1~ requlred to fabr'~ate the outer surfacec of the annular ~pacer~ 32.
In addltlon to the above, the shell lnternal broach as~embly 28 of thl~ lnventlon may lnclude a number of shavlng rlngs 20, a~ taught by the prlor art. To lock the end and lntermedlate annular ahelln 34 and 36 and the shavlng rlngc 20 on the pulllng arbor 10, the ~hell internal broach a~embly 28 conventlonally wlll also lnclude a nut 26 or other ~ultable device whlch i~ threadably recelved on a threaded portlon 24 of the pulllng arbor 10. Generally, the end and ~nte ~ te annular shells 34 and 36 will be mounted on the pulling arbor 10 such that the flrst end annular shell 34 wlll abut an enlarged portlon 22 at an end of the pulllng arbor 10 opposite the nut 26, as ~hown ln Flgure 3.
, ' ' . ' ~ , ' ' '''2'1:I"22'1'2'" ' '"'''' ~
From the above, it aan be eeen that a ~ignlficant advantage of the shell internal broach a~sembly of this invention 18 that the subatant1ally shorter axial lengths of the end and intermediate annular shellE~ 34 and 36 ~ -permit thelr manufacture using precision manufacturirg t~chnl~lue~, auch as 5 ~ travelling-wire EDM technologies. A~ a re~ult, the precision, accuracy and repeatability by which the l3lots 42 are formed in the end and inte~ -'IAte ~ ~ ;
annular shell~ 34 and 36, as well as the concentriclty of the end and in~ - 'iAte annular shella 34 and 36, are significantly 1~ _ c.vr d over conventional ~~-~chlnln51 methods. Con~e~uently, the E~he,ll lnternal broach asaembly 28 of this invention 18 capable of presenting a highly repeatable broaching configuration to a workplece. In contrast, the shells 12 known ln the prior art ~Figures l and 2) are substantially longer, generally to provide a high length to diameter ratio for stability. ~lowe~rsr, the excessive lengths of such shells 12 prevent the use of travell1ng-wire EDM
methods, resulting in less precise ~~7hlnlng of the shells 12 and, therefore, less precise placement of the broaching inserts 16 relatlve to the arbor lO.
In addition, the shell internal broach a~sembly 28 of this invention promotes interchangeabillty and versatility in that the end and lnte ~iAte annular shells 34 and 36 may be readily replaced with other end and inte --'IAte annular uhells 34 and 36 havLng a different diameter and/or configuratlon, such as the number andlor positions of the broachlng inserts 16.
Another sign1f1cant advantage of th1s invention i8 that the use of ; ~ ~
the annular spacers 32 effectlvely reduces the cost of the shell internal .;~-broach assembly 28, in that the simple cylindrical outer ~urfac~a of the ~-annular spacers 32 18 less expens1ve to manufacture than the slots 42 ln the end and lnt~ te annular shell~ 34 and 36, whlch must b accurately formed to recelve the broaching inserts 16. Furthermore, the number and length oP the annular ~pacers 32 used can be varled ln accordance with the strength required by the broachlng inserts 16 to resist deformatlon by the ~ 2 ~ 2 1 2 cuttlng force~t. The annular spacers 32 al80 provlde the advAntage oi' faallltatlng chlp rnmoval durlng the operatlon of the ~tholl internztl bro~ch a~sembly 28, ln that the space provlded by the annular ~tpacers 32 between ad~acent end and lntr - ~Ate annular shells 34 and 36 can ~c_ - -te the chlp~t and swarf generated durlng the brcbr In~ proce~t6~.
While the lnventlon ha~ been de w rib6td ln terms of n preferred at, it 18 ap~ r~ that oth~r form6t could be adoptad by one 0klllnd in the art. For example, the ~lze and number of e~d ~nd/or lnt-- ~A~e annular 6~hell~t 34 and 36, aat well a6~ the manner ln whlch they ~re retalned on the pulllng arbor, could be varled from that shown ln the Flgure~t.
Addltlonally, other 6tyle~ of br~,ch~n~ ln~erts 16 could b- u~ted.
Accordlngly, the ncope of the lnventlon 1~ to be llmited only by the I -followlng clalm6t.
. t
Figure 5 i~ a cross-nectional view taken along ll~e 5-5 of Figure 3;
Flgure 6 ic a cro~-cectional view of an annular incert mountlng chell u~ed to support an end of a broaching insertt ~
Figure 7 in a cLo~n a~_Lional view of an annular ln~ert -~ g --shell uced to cupport an inte '~te portion of a broaching in~ert~
Figure 8 is a cross-cectional side vlew taken along line 8-8 of both Figure~ 6 and 7~ and Figure 9 i8 a ~ide view of a broaching in~ert.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to Figure 3, there i~ ~hown in partlal cro~-cection a ~ide view of a ~hell lnternal broach ac~embly 28 in accordance with a preferred ~ r--nt of thi~ lnvention, with varlou~
feature~ of the ~hell internal broach an~embly 28 being illustrated ln Figures 4 through 9. Ac illu~trated, the chell lnternal broach a~sembly 28 include~ a pulling arbor 10 which i~ sub~tantially ~imllar to the arbor 10 chown in Figure~ 1 and 2 of the prior art. In contras~ to the prior art ~hell internal broach ac~embly illu~trated in Figure~ 1 and 2, the ~hell ~ ' 2~12t~12 . ~ ~
internal broach a~sembly 28 of thl~ invention ha~ a number of annular-ehaped in~ert mounting ~hells whlch are formed to receLve a number of broaching in~erts 16, as shown in Figures 3 through S.
The annular insert mounting shells are ~ s~ of a ~et of end S annular shells 34, a~ ~hown in Figure 6, and a set of int~ ate annular shell~ 36, as ~hown ln Figure 7. A~ bast seen ln Flgure 8, the end annular shell~ 34 and the intermediAte annular ~hell~ 36 hava the ~ame cros~-sectional aonflguratlon. The end annular shells 34 and the int~ te annular shell~ 36 have formed ln their re~pect1ve peripherie~
an identical number of ~lot~ 42. In accordance witL thln inventlon, the ; ~;~
intermed1ate annular shell~ 36 and the end annular shells 34 are ~
annular-shaped, having an axial length whlch is lenn than their outer ~; ;diameters. Beaause of their shorter axial length~, the end annular shells 34 and the intsrmed~ate annular shells 36 can be m~chined u~ing -electronically-controlled ra~h~n~ng equl, - ~, such as numerical controlled (NC) EDN equlpment ~not ~hown), and more preferably, travelllng-wire EDM
equipment. Such technologies are within the 8Cope of those skilled in thu art, and will not be de~cribed in further detail.
By us1ng travelling-wire EDM manufacturing methods, the prof11e~
of the end and inte ~Ate annular shells 34 and 36 can be more accurately produced with higher repeatability, 80 as to provide a more acaurate and preci~e placement of the broaching in~ert~ 16 relative to the puliing arbor 10. In addltlon, travellLng-wire EDM methods can be used to form precisely-located alignment holes 50 ln th2 and and intermedlate annular shellM 34 and 36. The allgnment hole~ 50 are used durlng assembly of the shell lnternal broach as~embly 28 to axially allgn the end annular shell~ 34 and the lntermediate annular shell~ 36 relatlve to each other on the pulllng arbor 10.
When properly aligned with each other, the ~lotc 42 in the end annular shells 34 and the lnt~ 'iate annular shells 36 define a coLL6~0nding number of segmented elongate slots extendlng along the axial 2 ~ 1 2 2 ~
length of the pulling arbor 10. Each of the segmented elongate ~lotq 1~
slzed to acc -'~te at lea~t one broaahlng inqert 16, a~ ~hown Ln Figures 4, 5 and 9. The broaching lnaert~ 16 have lower portlon~ 48 recelvable ln the slotq 42 of the end and in~ Ate annular ahell~ 34 and 36, curh that a number of cut~ers 30 pro~ect radially from the end and lnt~ te annular shells 34 and 36, a~ aeen ln Flgureq 4 and 5.
In a preferred embodlment, each of the ~egmentsd elongate ~lots are sufflclently long ~o aa to ac~~ te two broaching in~ertc 16 whlch are elongate and lying end to end, aa ~hown ln Figu~e 3. Accordlngly, the lQ ahell internal broach a~qembly 28 l~ apportioned lnto,two broachlng ~-sectlon~. Each broachlng inaert 16 provlde~ a gradual but cont~n~on~ taper ~, to the broachlng conf~guration dlameter deflned by the radlally outward edge of dlametriaally opposed broaching inaert~ 16. ~hlle lt l~ preferred that ~-~
the broaching inserts 16 be elongate for practicing this invcntion, it i~
fore~eeable that one ~kllled in the art could greatly vary the aize and length of the broaahlng lnserts.
Aa ~een ln Figurea 6 and 7, the end annular chells 34 are aubatantially wider than the lnt~ te annular ahell~ 36 ~o a~ to AC_ 'ote two threaded bore~ 38 and 40 provlded at the bottom of each slot 42, while a ~lngle threaded bore 46 ic formed in the bottom of each alot 42 ln the lnt~ te annular ~hellq 36. Each of the threaded bore~ 38, 40 and 46 recelve~ a threaded fa~tener, ~uch a~ the boltn 18 shown in Figure 4.
Each broaching ln~ert 16 has a plurallty of mountlng bore~, auch a~ the four counteraunk mountlng bore~ 44 ~hown ln Flgure 9. One countersunk mountlng bore 44 l~ provlded at each end of the broachlng in~ert 16, while other mountlng borea 44 are located at equally ~paced lnt~ te locatlon~ a~ ehown. Two bolt~ 18 secure the ends of each broaching in~ert 16 to a co.~eayonding end annular shel1 34 through the coL.euyonding pair of the counter~unk mounting bore~ 44, whlle additlonal bolta 18 ~ecure lnt~ ate portionq of each broaching ln~art 16 to an approprlate number of lnte ~'~ate annular ~hellq 36, two aq lllustrated, through correapondlng 2~2~2 counter~unk mounting bore~ 44. The combinatlon of ~paclng the countersunk mountLng bore~ 44 on the broachlng ln~ertc 16 and the ~hort axLal lengths of the end and int~ 'iAte annular ~hell~ 34 and 36 re~ult~ in the end and int~ te annular ~hellc 34 and 36 belng axially cpaced apart along the length of the pulllng arbor 10. Tho~e ~killed in the art w111 recogn~e that the amount of lnte -~ te support requlred for the broaching lnaert~ ;~
16 wLll depend on the length of the broaching in~ert~ 16 and the deformatlon loads imposed by the broachlng operation. Accordl~gly, fewer or more intq -~l~te annular ~hells 36 may be reguired to ~ufficiently ~upport the lntermedlate portlons of the broachlng ln~ert~ 16.
Annular spacerc 32, shown in cro~ ection in Flgure 5, are slzed to have an axlal length which allows the annular upacer~ 32 to fit between ad~acent end and lnt~ - ;ate annular ~hell~ 34 and 36. The outer eurfacs 52 of the annular ~pacer~ 32 has an outer dlameter which lc ~llghtly lec~
than the dlameter deflned between the bottom of dlametrlcally-oppo~ed ~lots 42 on the end and lntermediate annular ~hell~ 34 and 36. Beca~-~e the outer surface 52 of the annular ~pacer~ 32 i~ ~paced radlally lnward from the lower portion 48 of the broaching lnserts 16 and, therefore, doe~ not lnterfere with the broaching ln~erts 16 when mounted in the ~lots 42, no critlcal or precl~ion grlndlng or --h~n~ng 1~ requlred to fabr'~ate the outer surfacec of the annular ~pacer~ 32.
In addltlon to the above, the shell lnternal broach as~embly 28 of thl~ lnventlon may lnclude a number of shavlng rlngs 20, a~ taught by the prlor art. To lock the end and lntermedlate annular ahelln 34 and 36 and the shavlng rlngc 20 on the pulllng arbor 10, the ~hell internal broach a~embly 28 conventlonally wlll also lnclude a nut 26 or other ~ultable device whlch i~ threadably recelved on a threaded portlon 24 of the pulllng arbor 10. Generally, the end and ~nte ~ te annular shells 34 and 36 will be mounted on the pulling arbor 10 such that the flrst end annular shell 34 wlll abut an enlarged portlon 22 at an end of the pulllng arbor 10 opposite the nut 26, as ~hown ln Flgure 3.
, ' ' . ' ~ , ' ' '''2'1:I"22'1'2'" ' '"'''' ~
From the above, it aan be eeen that a ~ignlficant advantage of the shell internal broach a~sembly of this invention 18 that the subatant1ally shorter axial lengths of the end and intermediate annular shellE~ 34 and 36 ~ -permit thelr manufacture using precision manufacturirg t~chnl~lue~, auch as 5 ~ travelling-wire EDM technologies. A~ a re~ult, the precision, accuracy and repeatability by which the l3lots 42 are formed in the end and inte~ -'IAte ~ ~ ;
annular shell~ 34 and 36, as well as the concentriclty of the end and in~ - 'iAte annular shella 34 and 36, are significantly 1~ _ c.vr d over conventional ~~-~chlnln51 methods. Con~e~uently, the E~he,ll lnternal broach asaembly 28 of this invention 18 capable of presenting a highly repeatable broaching configuration to a workplece. In contrast, the shells 12 known ln the prior art ~Figures l and 2) are substantially longer, generally to provide a high length to diameter ratio for stability. ~lowe~rsr, the excessive lengths of such shells 12 prevent the use of travell1ng-wire EDM
methods, resulting in less precise ~~7hlnlng of the shells 12 and, therefore, less precise placement of the broaching inserts 16 relatlve to the arbor lO.
In addition, the shell internal broach a~sembly 28 of this invention promotes interchangeabillty and versatility in that the end and lnte ~iAte annular shells 34 and 36 may be readily replaced with other end and inte --'IAte annular uhells 34 and 36 havLng a different diameter and/or configuratlon, such as the number andlor positions of the broachlng inserts 16.
Another sign1f1cant advantage of th1s invention i8 that the use of ; ~ ~
the annular spacers 32 effectlvely reduces the cost of the shell internal .;~-broach assembly 28, in that the simple cylindrical outer ~urfac~a of the ~-annular spacers 32 18 less expens1ve to manufacture than the slots 42 ln the end and lnt~ te annular shell~ 34 and 36, whlch must b accurately formed to recelve the broaching inserts 16. Furthermore, the number and length oP the annular ~pacers 32 used can be varled ln accordance with the strength required by the broachlng inserts 16 to resist deformatlon by the ~ 2 ~ 2 1 2 cuttlng force~t. The annular spacers 32 al80 provlde the advAntage oi' faallltatlng chlp rnmoval durlng the operatlon of the ~tholl internztl bro~ch a~sembly 28, ln that the space provlded by the annular ~tpacers 32 between ad~acent end and lntr - ~Ate annular shells 34 and 36 can ~c_ - -te the chlp~t and swarf generated durlng the brcbr In~ proce~t6~.
While the lnventlon ha~ been de w rib6td ln terms of n preferred at, it 18 ap~ r~ that oth~r form6t could be adoptad by one 0klllnd in the art. For example, the ~lze and number of e~d ~nd/or lnt-- ~A~e annular 6~hell~t 34 and 36, aat well a6~ the manner ln whlch they ~re retalned on the pulllng arbor, could be varled from that shown ln the Flgure~t.
Addltlonally, other 6tyle~ of br~,ch~n~ ln~erts 16 could b- u~ted.
Accordlngly, the ncope of the lnventlon 1~ to be llmited only by the I -followlng clalm6t.
. t
Claims (20)
1. A broach apparatus comprising:
an arbor;
a plurality of annular members disposed on said arbor, each of said plurality of annular members having a receptacle formed on its periphery, said plurality of annular members being aligned on said arbor so as to align each said receptacle and thereby define an elongate slot extending substantially longitudinally along said arbor;
a plurality of annular spacers disposed on said arbor, at least one of said plurality of annular spacers being disposed between at least one adjacent pair of said plurality of annular members; and means disposed on said arbor for retaining said plurality of annular members and said plurality of annular spacers concentrically positioned relative to each other on said arbor.
an arbor;
a plurality of annular members disposed on said arbor, each of said plurality of annular members having a receptacle formed on its periphery, said plurality of annular members being aligned on said arbor so as to align each said receptacle and thereby define an elongate slot extending substantially longitudinally along said arbor;
a plurality of annular spacers disposed on said arbor, at least one of said plurality of annular spacers being disposed between at least one adjacent pair of said plurality of annular members; and means disposed on said arbor for retaining said plurality of annular members and said plurality of annular spacers concentrically positioned relative to each other on said arbor.
2. The broach apparatus of Claim 1 further comprising a plurality of shaving rings disposed at one end of said arbor so as to be substantially concentric with said plurality of annular members.
3. The broach apparatus of Claim 1 further comprising at least one insert retained in said elongate slot.
4. The broach apparatus of Claim 3 further comprising:
end mounting members disposed adjacent each end said at least one insert, said end mounting members securing said at least one insert to at least two of said plurality of annular members; and an intermediate mounting member disposed between adjacent end mounting members on said at least one insert, said intermediate mounting member securing said at least one insert to at least one of said plurality of annular members.
end mounting members disposed adjacent each end said at least one insert, said end mounting members securing said at least one insert to at least two of said plurality of annular members; and an intermediate mounting member disposed between adjacent end mounting members on said at least one insert, said intermediate mounting member securing said at least one insert to at least one of said plurality of annular members.
5. The broach apparatus of Claim 1 further comprising at least two inserts retained in said elongate slot.
6. The broach apparatus of Claim 5 wherein adjacent ends of said at least two said inserts are secured to one of said plurality of annular members.
7. The broach apparatus of Claim 1 wherein each of said plurality of annular members has a plurality of receptacles formed on its periphery, said plurality of annular members being aligned on said arbor so as to align said plurality of receptacles and thereby define a plurality of elongate slots extending substantially longitudinally along said arbor, said broach apparatus further comprising at least one insert retained in each of said plurality of elongate slots.
8. An internal broach apparatus comprising:
an arbor having an abutment, a threaded portion spaced apart from said abutment, and a cylindrical portion intermediate said abutment and said threaded portion;
a plurality of annular members disposed on said cylindrical portion of said arbor, each of said plurality of annular members having a plurality of slots formed on its periphery, said plurality of annular spacers being disposed between at least one adjacent pair of said plurality of annular members;
a plurality of annular spacers disposed on said cylindrical portion of said arbor so as to be substantially concentric with said plurality of annular members, at least one of said plurality of annular spacers being disposed between at least one adjacent pair of said plurality of annular members;
a plurality of inserts secured within said plurality of segmented elongate slots; and means threadably mounted to said threaded portion for retaining said plurality of annular members and said plurality of annular spacers on said cylindrical portion of said arbor.
an arbor having an abutment, a threaded portion spaced apart from said abutment, and a cylindrical portion intermediate said abutment and said threaded portion;
a plurality of annular members disposed on said cylindrical portion of said arbor, each of said plurality of annular members having a plurality of slots formed on its periphery, said plurality of annular spacers being disposed between at least one adjacent pair of said plurality of annular members;
a plurality of annular spacers disposed on said cylindrical portion of said arbor so as to be substantially concentric with said plurality of annular members, at least one of said plurality of annular spacers being disposed between at least one adjacent pair of said plurality of annular members;
a plurality of inserts secured within said plurality of segmented elongate slots; and means threadably mounted to said threaded portion for retaining said plurality of annular members and said plurality of annular spacers on said cylindrical portion of said arbor.
9. The internal broach apparatus of Claim 8 wherein said plurality of annular spacers are interleaved with said plurality of annular members.
10. The internal broach apparatus of Claim 8 further comprising a plurality of shaving rings disposed on said cylindrical portion adjacent said threaded portion of said arbor, said plurality of shaving rings being substantially concentric with said plurality of annular members.
11. The internal broach apparatus of Claim 8 wherein said retaining means comprises a threaded nut.
12. The internal broach apparatus of Claim 8 further comprising:
end mounting members disposed adjacent each end of each of said plurality of inserts, said end mounting members securing said each of said plurality of inserts to at least two of said plurality of annular members; and and intermediate mounting member disposed between adjacent end mounting members on said each of said plurality of inserts, said intermediate mounting member securing said each of said plurality of inserts to at least one of said plurality of annular members.
end mounting members disposed adjacent each end of each of said plurality of inserts, said end mounting members securing said each of said plurality of inserts to at least two of said plurality of annular members; and and intermediate mounting member disposed between adjacent end mounting members on said each of said plurality of inserts, said intermediate mounting member securing said each of said plurality of inserts to at least one of said plurality of annular members.
13. The internal broach apparatus of Claim 8 wherein at least two of said plurality of inserts are secured in each one of said plurality of segmented elongate slots.
14. The internal broach apparatus of Claim 13 wherein adjacent ends of said at least two of said plurality of inserts are secured to one of said plurality of annular members.
15. An insert mounting assembly for an internal broach apparatus having an arbor, said arbor having an abutment, a threaded portion spaced apart from said abutment, and a cylindrical portion intermediate said abutment and said threaded portion, said internal broach apparatus supporting a plurality of inserts and including a threaded member mounted to said threaded portion, said insert mounting assembly comprising:
a plurality of annular member disposed on said cylindrical portion of said arbor, each of said plurality of annular members having at least one slot formed on its periphery, said plurality of annular members being aligned on said arbor so as to align said at least one slot of each of said plurality of annular members so as to defined at least one segmented elongate slot extending substantially longitudinally along said arbor, said at least one segmented elongate slot receiving at least one of said plurality of inserts;
means for securing said at least one of said plurality of inserts in said at least one segmented elongate slot; and a plurality of annular spacers disposed on said cylindrical portion of said arbor, at least one of said plurality of annular spacers being disposed between at least one adjacent pair of said plurality of annular members.
a plurality of annular member disposed on said cylindrical portion of said arbor, each of said plurality of annular members having at least one slot formed on its periphery, said plurality of annular members being aligned on said arbor so as to align said at least one slot of each of said plurality of annular members so as to defined at least one segmented elongate slot extending substantially longitudinally along said arbor, said at least one segmented elongate slot receiving at least one of said plurality of inserts;
means for securing said at least one of said plurality of inserts in said at least one segmented elongate slot; and a plurality of annular spacers disposed on said cylindrical portion of said arbor, at least one of said plurality of annular spacers being disposed between at least one adjacent pair of said plurality of annular members.
16. The insert mounting assembly of Claim 15 wherein said plurality of annular spacers are interleaved with said plurality of annular members.
17. The insert mounting assembly of Claim 15 wherein said at least one slot formed on the periphery of each of said plurality of annular members is a plurality of axial slots, said plurality of annular members being aligned on said arbor so as to align said plurality of axial slots and thereby define a plurality of segmented elongated slots extending substantially longitudinally along said arbor, at least one of said plurality of inserts being retained in each of said plurality of segmented elongate slots.
18. The insert mounting assembly of Claim 15 further comprising:
end mounting members disposed adjacent each end of each of said plurality of inserts, said end mounting members securing said each of said plurality of inserts to at least two of said plurality of annular members; and an intermediate mounting member disposed between adjacent end mounting members on said each of said plurality of inserts, said intermediate mounting member securing said each of said plurality of inserts to at least one of said plurality of annular members.
end mounting members disposed adjacent each end of each of said plurality of inserts, said end mounting members securing said each of said plurality of inserts to at least two of said plurality of annular members; and an intermediate mounting member disposed between adjacent end mounting members on said each of said plurality of inserts, said intermediate mounting member securing said each of said plurality of inserts to at least one of said plurality of annular members.
19. The insert mounting assembly of Claim 15 wherein at least two of said plurality of inserts are secured in each said at least on segmented elongate slot.
20. The insert mounting assembly of Claim 19 wherein adjacent ends of said at least two of said plurality of inserts are secured to one of said plurality of annular members.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/014,648 US5352068A (en) | 1993-02-08 | 1993-02-08 | Broach apparatus |
| US08/014,648 | 1993-02-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2112212A1 CA2112212A1 (en) | 1994-08-09 |
| CA2112212C true CA2112212C (en) | 1997-11-18 |
Family
ID=21766805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002112212A Expired - Fee Related CA2112212C (en) | 1993-02-08 | 1993-12-22 | Broach apparatus |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5352068A (en) |
| CA (1) | CA2112212C (en) |
| DE (1) | DE4402843C2 (en) |
| FR (1) | FR2701878B1 (en) |
| GB (1) | GB2274798B (en) |
| SE (1) | SE9400071L (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5618450A (en) * | 1995-06-07 | 1997-04-08 | Stuart; James P. | Tool having interchangeable indicia marking electrodes for use in electrical discharge machining |
| US6767168B2 (en) | 2000-06-04 | 2004-07-27 | Rolls-Royce Corporation | Method and apparatus for forming openings in a workpiece |
| US6702524B2 (en) | 2001-06-04 | 2004-03-09 | Rolls-Royce Corporation | Broach carrier |
| US6644358B2 (en) * | 2001-07-27 | 2003-11-11 | Manoir Industries, Inc. | Centrifugally-cast tube and related method and apparatus for making same |
| US6551032B1 (en) * | 2001-11-07 | 2003-04-22 | General Electric Company | Multi-part dovetail repair broach assembly and methods of use |
| US6676336B2 (en) * | 2001-11-13 | 2004-01-13 | General Electric Company | Multi-part dovetail repair broach assembly and methods of use |
| EP2281978B1 (en) | 2002-04-03 | 2016-10-12 | Välinge Innovation AB | Method of attaching a strip to a floorboard |
| JP2004338009A (en) * | 2003-05-14 | 2004-12-02 | Nachi Fujikoshi Corp | Cemented carbide broach, broaching method, and broaching machine |
| DE202006006565U1 (en) * | 2006-04-25 | 2007-07-19 | Fessler, Ewald | Broaching tool for use in stainless steel material, has needles arranged at circumference of tool, and defining recess, in which needle with its front ends is pivotable to form smaller drive diameter in hole |
| US7465134B2 (en) * | 2006-06-06 | 2008-12-16 | Gm Global Technology Operations, Inc. | Broaching apparatus and method for producing a gear member with tapered gear teeth |
| US7326012B2 (en) * | 2006-06-30 | 2008-02-05 | Gm Global Technology Operations, Inc. | Broaching apparatus and method for producing a gear member with tapered gear teeth |
| US11717901B2 (en) | 2009-07-31 | 2023-08-08 | Valinge Innovation Ab | Methods and arrangements relating to edge machining of building panels |
| WO2011014112A1 (en) * | 2009-07-31 | 2011-02-03 | Välinge Innovation AB | Methods and arrangements relating to edge machining of building panels |
| BR112012001979B1 (en) * | 2009-07-31 | 2020-12-22 | Välinge Innovation AB | method for producing mechanical locking systems on a floor panel |
| US9816270B2 (en) | 2012-06-19 | 2017-11-14 | Valinge Innovation Ab | Mechanical locking system for floorboards |
| EP3798385A1 (en) | 2019-09-24 | 2021-03-31 | Välinge Innovation AB | Building panel |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1806552A (en) * | 1931-05-19 | Poration | ||
| US735825A (en) * | 1902-05-13 | 1903-08-11 | John H Rohret | Rasp. |
| FR22248E (en) * | 1916-11-23 | 1921-05-24 | Louis Renault | Method for the calibration and marking of firearms |
| US1692977A (en) * | 1927-05-23 | 1928-11-27 | Detroit Broach Corp | Broach with adjustable broaching members |
| FR671990A (en) * | 1929-03-25 | 1929-12-20 | Sharp file | |
| US1935774A (en) * | 1929-06-26 | 1933-11-21 | Colonial Tool Company | Broach |
| GB414331A (en) * | 1933-10-31 | 1934-08-02 | Lapointe Machine Tool Co | Improvements in or relating to metal cutting broaches |
| US2525098A (en) * | 1946-08-23 | 1950-10-10 | Production Broaching Corp | Broach |
| GB997740A (en) * | 1963-03-22 | 1965-07-07 | Sykes & Hepworth Engineers Ltd | Improvements in or relating to expansible broaches |
| GB1102113A (en) * | 1966-01-14 | 1968-02-07 | Frank Holdsworth Bentham | Improvements in or relating to tyre rasps |
| US3618187A (en) * | 1969-03-13 | 1971-11-09 | Wayne Emil Jensen | Tire peeling device |
| US3656220A (en) * | 1970-01-02 | 1972-04-18 | Carmet Co | Indexable broach |
| GB1365819A (en) * | 1972-02-02 | 1974-09-04 | Lapointe Machine Tool Co | Broaching tools |
| SU443730A1 (en) * | 1972-08-10 | 1974-09-25 | Московское Ордена Ленина И Ордена Трудового Красного Знамени Высшее Техническое Училище Им. Н.Э.Баумана | Sectional stretching |
| DE2542346C3 (en) * | 1975-09-23 | 1978-05-18 | Jean Walterscheid Gmbh, 5204 Lohmar | Internal broaching tool, in particular for producing profile grooves |
| DE2547320B2 (en) * | 1975-10-22 | 1979-04-12 | Fa. August Berghaus, 5630 Remscheid | Inside broaching tool |
| US4065222A (en) * | 1976-10-20 | 1977-12-27 | Lear Siegler, Inc. | Pot broach |
| DE3018915A1 (en) * | 1980-05-17 | 1981-11-26 | Bubeck, Friedrich, 7530 Pforzheim | Groove reaming in sync. rotor - involves reaming bush contg. cutter rings, with rotation preventing key engaging keyway cut above rings |
| SU1359082A1 (en) * | 1985-02-26 | 1987-12-15 | Научно-производственное объединение по комплексному технологическому проектированию станкостроительных предприятий "Оргстанкинпром" | Broach having inserted cutting edges |
| DE3644885A1 (en) * | 1986-06-26 | 1988-01-07 | Hurth Masch Zahnrad Carl | Method for refinishing a spline bore hub profile in a hardened workpiece and broaching tool suitable therefor |
-
1993
- 1993-02-08 US US08/014,648 patent/US5352068A/en not_active Expired - Fee Related
- 1993-12-22 CA CA002112212A patent/CA2112212C/en not_active Expired - Fee Related
-
1994
- 1994-01-13 SE SE9400071A patent/SE9400071L/en not_active Application Discontinuation
- 1994-01-31 DE DE4402843A patent/DE4402843C2/en not_active Expired - Fee Related
- 1994-02-02 GB GB9401982A patent/GB2274798B/en not_active Expired - Fee Related
- 1994-02-07 FR FR9401345A patent/FR2701878B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB2274798B (en) | 1996-01-03 |
| CA2112212A1 (en) | 1994-08-09 |
| FR2701878A1 (en) | 1994-09-02 |
| SE9400071L (en) | 1994-08-09 |
| GB9401982D0 (en) | 1994-03-30 |
| FR2701878B1 (en) | 1995-10-13 |
| GB2274798A (en) | 1994-08-10 |
| DE4402843C2 (en) | 1996-07-11 |
| DE4402843A1 (en) | 1994-08-18 |
| SE9400071D0 (en) | 1994-01-13 |
| US5352068A (en) | 1994-10-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |