US500213A - Metal-drill - Google Patents
Metal-drill Download PDFInfo
- Publication number
- US500213A US500213A US500213DA US500213A US 500213 A US500213 A US 500213A US 500213D A US500213D A US 500213DA US 500213 A US500213 A US 500213A
- Authority
- US
- United States
- Prior art keywords
- drill
- faces
- metal
- cutting
- lines
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 238000003892 spreading Methods 0.000 description 6
- 230000037250 Clearance Effects 0.000 description 4
- 210000000614 Ribs Anatomy 0.000 description 4
- 230000035512 clearance Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/24—Overall form of drilling tools
- B23B2251/241—Cross sections of the diameter of the drill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
-
- 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
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
Definitions
- This invention relates to that class of drills which are of the general form of a cylinder grooved in the opposite sides thereof; the object being to provide a, drill of improved construction adapted to be cheaply manufactured, and having its pointv relieved longitudinally and circumferentially, so that the drill will cut freely, and have proper clearance.
- Figure 1 is an end view of my improved metal-drill.
- Fig. 2 is a side view of the drill, drawn in projection with Fig. 1, and in the position which best illustrates the spread of the point, or longitudinal relief, thereof.
- Fig. 3 is a View similar to Fig. 1, but drawn in a different position.
- Fig. 4 is a view similar to Fig. 2, but drawn in projection withgFig. 3.
- Figs. 5, 6, and 7 are cross-sectional views of the drill, in lines a a, b b, and c c of Fig. 4, corresponding to lines a a, b b, and c c of Fig. 2.
- Iy improved metal-drill is adapted to be made from steel rod or bar, forged or rolled into suitable cross-sectional form, as shown, for instance, in Fig. 7, and cut to any required length.
- Said drill-rod is of a substantially cylindrical form, as indicated by the circle 9, Fig. 7, and is grooved on the two sides thereof to form the faces 2 and 4 on the line 77. h, and the faces 6 and 8 on the line 11 '6 crosswise to said line it h.
- Both of said lines 71. h and i z are shown intersecting each other at the center of the circle 9, (which is the axis of the drill,) and are also shown crossing each other at right angles, this being the preferred arrangement thereof.
- the thickness of the drill between the bottom of its grooves 10 and 12 is represented by the distance 14, Fig. 7, this distance being determined by the arcs, or curves, forming the bottom of said grooves 10 and 12, as will be understood by comparison of the several diagrammatic lines, Fig. 7.
- the normal section (Fig. 7) of the drill consists, practically, of the two oppositely-disposed quadrant-sections 13 and 15, their points joining at the axis of the drill, and connected by the thin web 16. This section being symmetrical, the drill-rod may be pointed at either end, with the same result.
- the drill designated in a general way .by B, is spread at the cutting-end thereof to give the required circumferential clearance represented by the space between the lines 9 and e, Figs. 1, 3, 5, 6, and 7.
- the spreading of the drill is continued only a short distance, relatively, from the drill-point backward therefrom, being shown extending only to the section-line c c; the sides of the remaining length of the drill are in parallel lines.
- the circumferential relief extends from the cutting-faces 2 and 4, backwardly and inwardly, on spiral lines, to the opposite faces, 6 and 8, respectively, of the ribs, or quadrant-sections, 13 and 15.
- the manner in which the drill-rod is spread to form the relieved cutting-points 3 and 5, respectively, is by spreading or throwing out the metal in a plane parallel with the faces, 2 and 4, of the quadrant-sections 13 and 15, said plane being represented by the line h h, Fig. 7.
- the spreading of the blank begins at about the line 0 c (and c c, Fig. 2), and increases regularly from thence to the point of the drill.
- the opposite faces 6 and 8 of said quadrant-sections are thrown forward as indicated at 7 and 9, thereby furnishing the metal required for filling out the cutting-edges in the plane, h h, described. This will be understood by comparison of the several figures of drawings, in connection with the preceding description.
- the drill-rod 13 consists of the two oppositely-disposed sections 13 and 15, set point to point and joined by the thin web at 16, Fig. 7.
- the metal at the back of each said section, or rib, 13 and 15, is displaced by throwing the same forward to furnish the stock necessary for extending the cutting-faces 2 and 4 in the normal planes thereof, (thereby permitting of this construction of the drillpoint,) and also to reduce the grinding-faces, 18 and 20, Figs. 1 and 3, of the drill.
- the improved drill herein described consisting of the drill-rod comprising the two oppositely-disposed parallel quadrant-sections joined at their apexes by a web in the axis of the drill, and each of said sections having its ends widened in the plane of its cutting face to give longitudinal relief, and having the outer surface of its said widened end reduced eccentrically to the drill axis and backwardly from said cutting-face to give circumferential relief to the drill, substantially as described.
- the improved drill herein described consisting of the substantially cylindrical drillrod having the opposite parallel grooves whose respective faces are in planes intersecting each other at the axis of the drill, and having its cutting end widened on tapering lines in the plane of the cutting-faces to give longitudinal relief, and having-said tapered portion reduced diametrically on lines eccentric to the axis of the drill to give circumferential relief, substantially as described.
- the improved drill herein described consisting of the drill-rod, grooved and shaped to form two oppositelydisposed quadrant sections, diametrically converging from their outer ends inward for a portion of the length of the drill, joined at their inner edges by an axial web, and having their outer faces eccentric to the axis of the drill, and their grinding faces of reduced width, whereby longitudinal and circumferential relief is seen red to the drill, substantially as described.
Description
(No Model.)
I. H. RICHARDS. METAL DRILL.
No. 500,213. Pateilted June 27, 1893.
Inverzlar:
UNITED STATES PATENT OFFICE.
FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT, ASSIGNOR TO \VALTER WVOOD, OF PHILADELPHIA, PENNSYLVANIA.
M ETAL-DRILL.
SPECIFICATION forming part of Letters Patent No. 500,213, dated June 27, 1893.
Application filed March 25. 1892.
To all whom it may concern:
Be it known that I, FRANCIS H. RICHARDS, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and usefullmprovementsin Metal-D rills, of which the following is a specification.
This invention relates to that class of drills which are of the general form of a cylinder grooved in the opposite sides thereof; the object being to provide a, drill of improved construction adapted to be cheaply manufactured, and having its pointv relieved longitudinally and circumferentially, so that the drill will cut freely, and have proper clearance.
In the drawings accompanying and forming a part of this specification, Figure 1 is an end view of my improved metal-drill. Fig. 2 is a side view of the drill, drawn in projection with Fig. 1, and in the position which best illustrates the spread of the point, or longitudinal relief, thereof. Fig. 3 is a View similar to Fig. 1, but drawn in a different position. Fig. 4 is a view similar to Fig. 2, but drawn in projection withgFig. 3. Figs. 5, 6, and 7 are cross-sectional views of the drill, in lines a a, b b, and c c of Fig. 4, corresponding to lines a a, b b, and c c of Fig. 2.
Similar characters designate like parts in all the figures.
Iy improved metal-drill is adapted to be made from steel rod or bar, forged or rolled into suitable cross-sectional form, as shown, for instance, in Fig. 7, and cut to any required length. Said drill-rod is of a substantially cylindrical form, as indicated by the circle 9, Fig. 7, and is grooved on the two sides thereof to form the faces 2 and 4 on the line 77. h, and the faces 6 and 8 on the line 11 '6 crosswise to said line it h. Both of said lines 71. h and i z are shown intersecting each other at the center of the circle 9, (which is the axis of the drill,) and are also shown crossing each other at right angles, this being the preferred arrangement thereof. The thickness of the drill between the bottom of its grooves 10 and 12 is represented by the distance 14, Fig. 7, this distance being determined by the arcs, or curves, forming the bottom of said grooves 10 and 12, as will be understood by comparison of the several diagrammatic lines, Fig. 7.
Serial No. 426,434. (No model.)
The normal section (Fig. 7) of the drill consists, practically, of the two oppositely-disposed quadrant-sections 13 and 15, their points joining at the axis of the drill, and connected by the thin web 16. This section being symmetrical, the drill-rod may be pointed at either end, with the same result.
As shown in the drawings, the drill, designated in a general way .by B, is spread at the cutting-end thereof to give the required circumferential clearance represented by the space between the lines 9 and e, Figs. 1, 3, 5, 6, and 7. The spreading of the drill is continued only a short distance, relatively, from the drill-point backward therefrom, being shown extending only to the section-line c c; the sides of the remaining length of the drill are in parallel lines. As seen in end view, Figs. 1, 3, 5, 6, and 7, the circumferential relief extends from the cutting- faces 2 and 4, backwardly and inwardly, on spiral lines, to the opposite faces, 6 and 8, respectively, of the ribs, or quadrant-sections, 13 and 15.
The operation of shaping the end of the drill-rod to spread the same to have the 1011- gitudinal an d circumferential relief described, is effected by means of forging-dies of peculiar construction, which dies form the subject-matter of a separate application, Serial No. 426,952, filed March 29, 1892.
The manner in which the drill-rod is spread to form the relieved cutting-points 3 and 5, respectively, is by spreading or throwing out the metal in a plane parallel with the faces, 2 and 4, of the quadrant-sections 13 and 15, said plane being represented by the line h h, Fig. 7. The spreading of the blank begins at about the line 0 c (and c c, Fig. 2), and increases regularly from thence to the point of the drill. As a means for obtaining the required widening of the drill-point without misshaping the cutting- faces 2 and 4 of the drill, the opposite faces 6 and 8 of said quadrant-sections are thrown forward as indicated at 7 and 9, thereby furnishing the metal required for filling out the cutting-edges in the plane, h h, described. This will be understood by comparison of the several figures of drawings, in connection with the preceding description.
In manufacturing the drills, after the ends cutting-edges 3'5, after the manner of or-- dinary twist-drills. When the drill has, by use and continued re-sharpening, been reduced in length to about the line a a, it should then be reforged to bring the longitudinal relief up to its original proportions, after which the drill may be re-sharpened as before; these operations may be repeated until nearly the whole length of the piece of drillrod has been used.
As hereinbefore stated, the drill-rod 13 consists of the two oppositely-disposed sections 13 and 15, set point to point and joined by the thin web at 16, Fig. 7. In the finished drill, the metal at the back of each said section, or rib, 13 and 15, is displaced by throwing the same forward to furnish the stock necessary for extending the cutting- faces 2 and 4 in the normal planes thereof, (thereby permitting of this construction of the drillpoint,) and also to reduce the grinding-faces, 18 and 20, Figs. 1 and 3, of the drill.
The amount of metal necessary to be supplied for properly forming the drill-faces above described, increases, of course, with the increasing width of the drill, as will be understood by comparison of Figs. 6, 5, and 1 with Fig. 2.
Having thus described my invention, I claim- 1. The improved drill herein described, consisting of the drill-rod comprising the two oppositely-disposed parallel quadrant-sections joined at their apexes by a web in the axis of the drill, and each of said sections having its ends widened in the plane of its cutting face to give longitudinal relief, and having the outer surface of its said widened end reduced eccentrically to the drill axis and backwardly from said cutting-face to give circumferential relief to the drill, substantially as described.
2. The improved drill herein described, consisting of the substantially cylindrical drillrod having the opposite parallel grooves whose respective faces are in planes intersecting each other at the axis of the drill, and having its cutting end widened on tapering lines in the plane of the cutting-faces to give longitudinal relief, and having-said tapered portion reduced diametrically on lines eccentric to the axis of the drill to give circumferential relief, substantially as described.
3. The improved drill herein described, consisting of the drill-rod, grooved and shaped to form two oppositelydisposed quadrant sections, diametrically converging from their outer ends inward for a portion of the length of the drill, joined at their inner edges by an axial web, and having their outer faces eccentric to the axis of the drill, and their grinding faces of reduced width, whereby longitudinal and circumferential relief is seen red to the drill, substantially as described.
FRANCIS I-I. RICHARDS.
Witnesses:
HENRY L. REGKARD, EMMA G. FOWLER.
Publications (1)
Publication Number | Publication Date |
---|---|
US500213A true US500213A (en) | 1893-06-27 |
Family
ID=2569047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US500213D Expired - Lifetime US500213A (en) | Metal-drill |
Country Status (1)
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US (1) | US500213A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4948306A (en) * | 1987-08-08 | 1990-08-14 | Aldof Wurth GmbH & Co. KG | Drill |
US5641251A (en) * | 1994-07-14 | 1997-06-24 | Cerasiv Gmbh Innovatives Keramik-Engineering | All-ceramic drill bit |
US6595730B2 (en) * | 2000-03-06 | 2003-07-22 | Alden Corporation | Bit for removing damaged screws |
US20030206989A1 (en) * | 2001-01-26 | 2003-11-06 | Demeyer Willy | Novel modified dorn structures |
US20130028677A1 (en) * | 2010-02-04 | 2013-01-31 | Kennametal, Inc. | Drill bit and method for manufacturing |
US9901990B2 (en) | 2010-02-04 | 2018-02-27 | Kennametal Inc. | Drilling tool |
-
0
- US US500213D patent/US500213A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4948306A (en) * | 1987-08-08 | 1990-08-14 | Aldof Wurth GmbH & Co. KG | Drill |
US5641251A (en) * | 1994-07-14 | 1997-06-24 | Cerasiv Gmbh Innovatives Keramik-Engineering | All-ceramic drill bit |
US6595730B2 (en) * | 2000-03-06 | 2003-07-22 | Alden Corporation | Bit for removing damaged screws |
US20030206989A1 (en) * | 2001-01-26 | 2003-11-06 | Demeyer Willy | Novel modified dorn structures |
US20130028677A1 (en) * | 2010-02-04 | 2013-01-31 | Kennametal, Inc. | Drill bit and method for manufacturing |
US9403246B2 (en) * | 2010-02-04 | 2016-08-02 | Kennametal Inc. | Drill bit and method for manufacturing |
US9901990B2 (en) | 2010-02-04 | 2018-02-27 | Kennametal Inc. | Drilling tool |
US10661356B2 (en) | 2010-02-04 | 2020-05-26 | Kennametal Inc. | Drilling tool |
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