EP1492650A1 - Method for manufacturing a directionally dependent reflective surface - Google Patents

Method for manufacturing a directionally dependent reflective surface

Info

Publication number
EP1492650A1
EP1492650A1 EP03709441A EP03709441A EP1492650A1 EP 1492650 A1 EP1492650 A1 EP 1492650A1 EP 03709441 A EP03709441 A EP 03709441A EP 03709441 A EP03709441 A EP 03709441A EP 1492650 A1 EP1492650 A1 EP 1492650A1
Authority
EP
European Patent Office
Prior art keywords
tool
manufacturing
cylindrical body
reflective surface
directionally dependent
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.)
Withdrawn
Application number
EP03709441A
Other languages
German (de)
French (fr)
Other versions
EP1492650A4 (en
Inventor
Kenneth Brian Thompson Pollard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bishop Steering Technology Ltd
Robert Bosch GmbH
Original Assignee
Bishop Steering Technology Ltd
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bishop Steering Technology Ltd, Robert Bosch GmbH filed Critical Bishop Steering Technology Ltd
Publication of EP1492650A1 publication Critical patent/EP1492650A1/en
Publication of EP1492650A4 publication Critical patent/EP1492650A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/08—Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B21C51/005—Marking devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/10—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form into a peculiar profiling shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • B21H7/187—Rolling helical or rectilinear grooves

Definitions

  • the invention relates to a method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body, and in particular to a method for manufacturing a directionally dependent reflective surface on a substantially cylindrical grating element or code disk having regions of high and low reflectivity.
  • code disks are found in torque sensors and angle sensors for use in electric power steering systems in vehicle applications.
  • Torque and angle sensors of the type suitable for use in vehicle electric power steering systems are described in International Patent Publication Nos. WO99/09385 and WO00/06973, both in the name of Bishop Innovation Pty Limited.
  • These type of torque and angle sensors utilise "grating elements” or “code disks” that have regions of high and low reflectivity on their outside surface that, in use, are illuminated by a source of electro-magnetic radiation (EMR).
  • EMR electro-magnetic radiation
  • One method of manufacturing such regions of high and low reflectivity on the outside surface of grating elements or code disks of a torque sensor by means of a laser patterning process is disclosed in International Patent Publication No. WO99/20427, also in the name of Bishop Innovation Pty Limited.
  • the present invention provides a method that facilitates the manufacture of a directionally dependent reflective surface on the outside surface of a substantially cylindrical body.
  • this method is suitable for manufacture of a directionally reflective surface on the outside surface of a grating element or code disk, prior to laser patterning regions of high and low reflectivity thereupon, such as that described in International Patent Publication No. WO99/20427.
  • the present invention consists in a method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body, said method comprising the engagement of a tool with the outside surface of said body, thereby forming at least one groove therein with a cross section, when measured parallel to the longitudinal axis of said body, that is asymmetric and wherein said groove is formed without removal of material from said body.
  • the method preferably comprises said tool relatively moving along said outside surface in a direction parallel to the longitudinal axis of said cylindrical body whilst said cylindrical body is rotated relative to said tool, thereby imparting a helical path to said tool relative to said body and hence forming said at least one groove as a helical groove.
  • said outside surface of said body is stainless steel or nickel silver.
  • the tool engages with said outside surface of said body to a depth in the range of 20 - 200 urn.
  • said body is rotated at an angular velocity in the range of 20 - 200 rev/min relative to said tool.
  • said tool is relatively moved along said outside surface at a feed rate in the range of 20- 200 urn/rev.
  • said body has a diameter in the range of 20 - 80 mm.
  • the method preferably comprises rotating said body whilst said tool is held axially stationary relative to said body.
  • Fig. 1 is a schematic end view of a tool engaging with a cylindrical body in accordance with a first embodiment of the present invention.
  • Fig. 2 is a schematic elevation view of the tool engaging with the cylindrical body of Fig. 1.
  • Figs. 3a and 3b are enlarged sectional views of the outside surface of the cylindrical body within circle A of Fig 2, when viewed in a cross sectional plane parallel to and passing through the longitudinal axis of the body.
  • FIGs. 1 and 2 schematically depict one embodiment of the present invention.
  • a substantially cylindrical body 1 preferably of grade 316 or 316L stainless steel, is rotated (in a direction indicated by arrow 3) about its longitudinal axis 2 at a speed in the range of about 20 - 200 revs/min.
  • Rotation of body 1 may be carried out in a machine having a rotating spindle such as a lathe.
  • Tool 4 preferably made of tungsten carbide coated with either titanium nitride or titanium carbon nitride, is tangentially introduced into the cylindrical outer surface 8 of body 1 to a depth typically in the range of 20 - 200 urn, and moved axially relative to body 1 in a direction 5, parallel to longitudinal axis 2, at a fixed feed rate in the range 20 - 200 um/rev.
  • a corner of tool 4 engages with body 1 , such that tool face 22 is disposed at angle 6 relative to the outside surface 8 of body 1 , of about 24 deg.
  • Axial movement of tool 4 relative to rotating body 1 results in a helically disposed groove 23 of asymmetrical form (when measured in cross section parallel to longitudinal axis 2 ), having a major face 9 and a minor face 10, formed in the outer surface 8.
  • the major face 9 is also at angle 6 to longitudinal axis 2, which in this embodiment is about 24 deg.
  • Helically disposed groove 23 has a pitch 21 that is equal to the axial feed rate of tool 4 relative to body 1. It has been found advantageous that this axial feed rate lies in the range of 20 - 200 um/rev, and hence the axial pitch 21 of helically disposed groove 23 also lies in this range of 20 - 200 urn, in order to generate an optimum directionally dependent reflective characteristic on the outside surface 8 of body 1.
  • helically disposed groove 23 appears to a have an asymmetrical saw tooth form.
  • suitable lubrication may be provided in the form of a soluble oil or an extreme pressure (EP) type synthetic or mineral oil.
  • EP extreme pressure
  • a certain level of hydrodynamic lubrication is maintained between tool face 22 and outside surface 8 of body 1 during the forming of groove 23, and hence it is possible to minimize wear on tool face 22 of tool 4.
  • the use of lubrication ensures the forming of major face 9 of groove 23 in a smooth and consistent manner with minimum wear on tool face 22.
  • groove 23 is asymmetric when viewed in cross section parallel to longitudinal axis 2 of body 1 , it ensures that EMR reflected thereupon from EMR source 12 and 17 is directionally dependent.
  • EMR emanating from source 12 strikes major face 9 at angle 16, relative to line 30, and is reflected back towards EMR detector 15 shown by arrow 14.
  • EMR emanating from source 17 strikes major face 9 at the same angle 16 relative to line 30 normal to longitudinal axis 2 and is reflected away from line 30 (ie. the normal to longitudinal axis 2) represented by arrow 19, in the opposite direction, thereby not being detected by EMR detector 15.
  • EMR detector 15 is arranged to detect EMR propagating normally to longitudinal axis 2 of body from the same point of reflection 20, the ability to detect EMR reflected from major face 9, is dependent on the location of the EMR source (ie. either source 12 or source 17) and the angle of major face 9.
  • Groove 23 thereby provides body 1 with a directionally dependent reflective characteristic.
  • a body 1 preferably having a diameter in the range of 20 - 80 mm, is suitable as a grating element or code disk to be laser patterned in accordance with International Patent Publication No. WO99/20427, for use in a torque sensor or angle sensor.
  • groove 23 is formed without removal of material, and the forming action of tool 4 upon body 1 is akin to a burnishing, planishing or rubbing action.
  • Figs. 3a and 3b outside surface 8 prior to the forming of groove 23, is shown as chain dotted line 11 which will lie at approximately the mean radial depth between tips 24 and roots 25 of groove 23.
  • angle 6 between tool 4 and body 1 is held at substantially 24 deg., it should be understood that in other not shown embodiments angle 6 may be some other angle, depending on the directionally dependent reflective characteristic that is desired for the particular application. In another not shown embodiment angle 6 may be varied during the process as tool 4 is moved axially relative to body 1 in direction as shown. This generates a directionally dependent reflective characteristic on outside surface 8 that varies along the length of body 1. In one case this embodies groups of predetermined different angles as a function of axial position along outside surface 8 of body 1 , or alternatively, angle 6 of groove 23 may vary continuously as a function of axial position along outside surface 8 of body 1.
  • body 1 may have one or more circumferential grooves, of asymmetric form when viewed in cross section parallel to longitudinal axis 2, imparted thereon and spaced axially apart at relatively small intervals in the range of 20 - 200 um.
  • tool 4 is brought into engagement with body 1 as body 1 is rotated relative to tool 4, thereby forming a continuous (or closed) circumferential groove.
  • Tool 4 is then radially withdrawn from body 1 , moved axially relative to body 1 by a small distance, and the process repeated.
  • an important feature is to ensure that material it is not removed from body 1 whilst tool 4 is engaged therewith and forming the asymmetric groove. This non-removal of material has been found to maximize the smoothness (and hence reflectivity) of major face of groove 23, and hence further benefit the optical properties of outside surface 8 of body 1.
  • the outside surface 8 of cylindrical body 1 is preferably manufactured from stainless steel eg. grade 316 or 316L.
  • Grade 316L has a lower carbon content to that of the standard grade 316, and therefore has greater malleability. It is therefore easier to form groove 23 therein without removal of material.
  • still other grades of stainless steel, or indeed other malleable materials such as nickel silver, may be used for the outside surface 8 of body 1.
  • the tool is preferably made of tungsten carbide coated with either titanium nitride or titanium carbon nitride, it may in other embodiments be made of high speed steel or any other suitable hard wearing forming/cutting tool grade material.
  • the body 1 Whilst in the abovementioned embodiment the body 1 is rotated about longitudinal axis 2 in a lathe and tool 4 is moved therealong, it shoud be understood that the operation may also occur in a milling machine, where similar relative movements between the tool 4 and body 1 may be carried out.

Abstract

A method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body (1). The method comprising the engagement of a tool (4) with the outside surface (8) of the body, thereby forming at least one groove (23) therein with a cross section, when measured parallel to the longitudinal axis (2) of the body, that is asymmetric and wherein the groove is formed without removal of material from the body.

Description

METHOD FOR MANUFACTURING A DIRECTIONALLY DEPENDENT
REFLECTIVE SURFACE
TECHNICAL FIELD
The invention relates to a method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body, and in particular to a method for manufacturing a directionally dependent reflective surface on a substantially cylindrical grating element or code disk having regions of high and low reflectivity. Such code disks are found in torque sensors and angle sensors for use in electric power steering systems in vehicle applications.
BACKGROUND
Torque and angle sensors of the type suitable for use in vehicle electric power steering systems are described in International Patent Publication Nos. WO99/09385 and WO00/06973, both in the name of Bishop Innovation Pty Limited. These type of torque and angle sensors utilise "grating elements" or "code disks" that have regions of high and low reflectivity on their outside surface that, in use, are illuminated by a source of electro-magnetic radiation (EMR). One method of manufacturing such regions of high and low reflectivity on the outside surface of grating elements or code disks of a torque sensor by means of a laser patterning process is disclosed in International Patent Publication No. WO99/20427, also in the name of Bishop Innovation Pty Limited.
The present invention provides a method that facilitates the manufacture of a directionally dependent reflective surface on the outside surface of a substantially cylindrical body. In particular this method is suitable for manufacture of a directionally reflective surface on the outside surface of a grating element or code disk, prior to laser patterning regions of high and low reflectivity thereupon, such as that described in International Patent Publication No. WO99/20427.
SUMMARY OF INVENTION
In a first aspect, the present invention consists in a method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body, said method comprising the engagement of a tool with the outside surface of said body, thereby forming at least one groove therein with a cross section, when measured parallel to the longitudinal axis of said body, that is asymmetric and wherein said groove is formed without removal of material from said body.
In one embodiment the method preferably comprises said tool relatively moving along said outside surface in a direction parallel to the longitudinal axis of said cylindrical body whilst said cylindrical body is rotated relative to said tool, thereby imparting a helical path to said tool relative to said body and hence forming said at least one groove as a helical groove.
Preferably said outside surface of said body is stainless steel or nickel silver.
Preferably the tool engages with said outside surface of said body to a depth in the range of 20 - 200 urn.
Preferably said body is rotated at an angular velocity in the range of 20 - 200 rev/min relative to said tool.
Preferably said tool is relatively moved along said outside surface at a feed rate in the range of 20- 200 urn/rev.
Preferably said body has a diameter in the range of 20 - 80 mm. In another embodiment the method preferably comprises rotating said body whilst said tool is held axially stationary relative to said body.
BRIEF DESCRIPTION OF DRAWINGS
Fig. 1 is a schematic end view of a tool engaging with a cylindrical body in accordance with a first embodiment of the present invention.
Fig. 2 is a schematic elevation view of the tool engaging with the cylindrical body of Fig. 1.
Figs. 3a and 3b are enlarged sectional views of the outside surface of the cylindrical body within circle A of Fig 2, when viewed in a cross sectional plane parallel to and passing through the longitudinal axis of the body.
MODE OF CARRYING OUT THE INVENTION
Figs. 1 and 2 schematically depict one embodiment of the present invention. A substantially cylindrical body 1 , preferably of grade 316 or 316L stainless steel, is rotated (in a direction indicated by arrow 3) about its longitudinal axis 2 at a speed in the range of about 20 - 200 revs/min. Rotation of body 1 , may be carried out in a machine having a rotating spindle such as a lathe.
Tool 4, preferably made of tungsten carbide coated with either titanium nitride or titanium carbon nitride, is tangentially introduced into the cylindrical outer surface 8 of body 1 to a depth typically in the range of 20 - 200 urn, and moved axially relative to body 1 in a direction 5, parallel to longitudinal axis 2, at a fixed feed rate in the range 20 - 200 um/rev.
When tool 4 is introduced into the outside surface 8 of body 1 , a corner of tool 4 engages with body 1 , such that tool face 22 is disposed at angle 6 relative to the outside surface 8 of body 1 , of about 24 deg. Axial movement of tool 4 relative to rotating body 1 , results in a helically disposed groove 23 of asymmetrical form (when measured in cross section parallel to longitudinal axis 2 ), having a major face 9 and a minor face 10, formed in the outer surface 8. The major face 9 is also at angle 6 to longitudinal axis 2, which in this embodiment is about 24 deg.
Helically disposed groove 23 has a pitch 21 that is equal to the axial feed rate of tool 4 relative to body 1. It has been found advantageous that this axial feed rate lies in the range of 20 - 200 um/rev, and hence the axial pitch 21 of helically disposed groove 23 also lies in this range of 20 - 200 urn, in order to generate an optimum directionally dependent reflective characteristic on the outside surface 8 of body 1.
When viewed in cross section as shown in Figs. 3a and 3b, helically disposed groove 23 appears to a have an asymmetrical saw tooth form.
In order to ensure that material it is not removed from body 1 whilst tool 4 is engaged therewith, suitable lubrication may be provided in the form of a soluble oil or an extreme pressure (EP) type synthetic or mineral oil. Ideally a certain level of hydrodynamic lubrication is maintained between tool face 22 and outside surface 8 of body 1 during the forming of groove 23, and hence it is possible to minimize wear on tool face 22 of tool 4. The use of lubrication ensures the forming of major face 9 of groove 23 in a smooth and consistent manner with minimum wear on tool face 22.
As groove 23 is asymmetric when viewed in cross section parallel to longitudinal axis 2 of body 1 , it ensures that EMR reflected thereupon from EMR source 12 and 17 is directionally dependent. With reference to Fig 3a, EMR emanating from source 12, as represented by arrow 13, strikes major face 9 at angle 16, relative to line 30, and is reflected back towards EMR detector 15 shown by arrow 14. However, with reference to Fig. 3b, EMR emanating from source 17 as represented by arrow 18, strikes major face 9 at the same angle 16 relative to line 30 normal to longitudinal axis 2 and is reflected away from line 30 (ie. the normal to longitudinal axis 2) represented by arrow 19, in the opposite direction, thereby not being detected by EMR detector 15.
In both instances, whilst EMR detector 15 is arranged to detect EMR propagating normally to longitudinal axis 2 of body from the same point of reflection 20, the ability to detect EMR reflected from major face 9, is dependent on the location of the EMR source (ie. either source 12 or source 17) and the angle of major face 9.
Groove 23 thereby provides body 1 with a directionally dependent reflective characteristic. Such a body 1 , preferably having a diameter in the range of 20 - 80 mm, is suitable as a grating element or code disk to be laser patterned in accordance with International Patent Publication No. WO99/20427, for use in a torque sensor or angle sensor.
It should be understood that an important aspect of the present invention is that groove 23 is formed without removal of material, and the forming action of tool 4 upon body 1 is akin to a burnishing, planishing or rubbing action. In Figs. 3a and 3b outside surface 8, prior to the forming of groove 23, is shown as chain dotted line 11 which will lie at approximately the mean radial depth between tips 24 and roots 25 of groove 23.
Whilst in the abovementioned embodiment angle 6 between tool 4 and body 1 is held at substantially 24 deg., it should be understood that in other not shown embodiments angle 6 may be some other angle, depending on the directionally dependent reflective characteristic that is desired for the particular application. In another not shown embodiment angle 6 may be varied during the process as tool 4 is moved axially relative to body 1 in direction as shown. This generates a directionally dependent reflective characteristic on outside surface 8 that varies along the length of body 1. In one case this embodies groups of predetermined different angles as a function of axial position along outside surface 8 of body 1 , or alternatively, angle 6 of groove 23 may vary continuously as a function of axial position along outside surface 8 of body 1.
Whilst the above mentioned embodiment is directed to the forming of helical groove 23, it should be understood that, in another not shown embodiment, body 1 may have one or more circumferential grooves, of asymmetric form when viewed in cross section parallel to longitudinal axis 2, imparted thereon and spaced axially apart at relatively small intervals in the range of 20 - 200 um. To achieve this, tool 4 is brought into engagement with body 1 as body 1 is rotated relative to tool 4, thereby forming a continuous (or closed) circumferential groove. Tool 4 is then radially withdrawn from body 1 , moved axially relative to body 1 by a small distance, and the process repeated. As with the earlier embodiment, an important feature is to ensure that material it is not removed from body 1 whilst tool 4 is engaged therewith and forming the asymmetric groove. This non-removal of material has been found to maximize the smoothness (and hence reflectivity) of major face of groove 23, and hence further benefit the optical properties of outside surface 8 of body 1.
In the abovementioned embodiment the outside surface 8 of cylindrical body 1 is preferably manufactured from stainless steel eg. grade 316 or 316L. Grade 316L has a lower carbon content to that of the standard grade 316, and therefore has greater malleability. It is therefore easier to form groove 23 therein without removal of material. However, in other embodiments still other grades of stainless steel, or indeed other malleable materials such as nickel silver, may be used for the outside surface 8 of body 1. Whilst in the above mentioned embodiment the tool is preferably made of tungsten carbide coated with either titanium nitride or titanium carbon nitride, it may in other embodiments be made of high speed steel or any other suitable hard wearing forming/cutting tool grade material.
Whilst in the abovementioned embodiment the body 1 is rotated about longitudinal axis 2 in a lathe and tool 4 is moved therealong, it shoud be understood that the operation may also occur in a milling machine, where similar relative movements between the tool 4 and body 1 may be carried out.
It should be understood that the symbol "um" as used herein represents micrometers.

Claims

1. A method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body, said method comprising the engagement of a tool with the outside surface of said body, thereby forming at least one groove therein with a cross section when measured parallel to the longitudinal axis of said body that is asymmetric, wherein said groove is formed without removal of material from said body.
2. A method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body as claimed in claim 1 , wherein said method further comprises said tool relatively moving along said outside surface in a direction parallel to the longitudinal axis of said cylindrical body whilst said cylindrical body is rotated relative to said tool, thereby imparting a helical path to said tool relative to said body and hence forming said at least one groove as a helical groove.
3. A method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body as claimed in claims 1 or 2, wherein said outside surface of said body is made of stainless steel or nickel silver.
4. A method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body as claimed in claims 1 to 3, wherein the tool engages with said outside surface of said body to a depth in the range of 20- 200 um.
5. A method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body as claimed in claims 2 to 4, wherein said body is rotated at an angular velocity in the range of 20-200 revs/min.
6. A method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body as claimed in 2 to 5, wherein said tool is relatively moved along said outside surface at a feed rate in the range of 20- 200 um/rev.
7. A method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body as claimed in claims 2 to 6, wherein said body has a diameter in the range of 20-80 mm.
8. A method for manufacturing a directionally dependent reflective surface on a substantially cylindrical body as claimed in claim 1 , wherein said method comprises rotating said body whilst said tool is held axially stationary relative to said body.
EP03709441A 2002-04-11 2003-04-11 Method for manufacturing a directionally dependent reflective surface Withdrawn EP1492650A4 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPS1693A AUPS169302A0 (en) 2002-04-11 2002-04-11 Method for manufacturing a directionally dependent reflective surface
AUPS169302 2002-04-11
PCT/AU2003/000430 WO2003086719A1 (en) 2002-04-11 2003-04-11 Method for manufacturing a directionally dependent reflective surface

Publications (2)

Publication Number Publication Date
EP1492650A1 true EP1492650A1 (en) 2005-01-05
EP1492650A4 EP1492650A4 (en) 2005-11-02

Family

ID=3835270

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03709441A Withdrawn EP1492650A4 (en) 2002-04-11 2003-04-11 Method for manufacturing a directionally dependent reflective surface

Country Status (7)

Country Link
US (1) US20050217335A1 (en)
EP (1) EP1492650A4 (en)
JP (1) JP2005522333A (en)
KR (1) KR20050005441A (en)
CN (1) CN1646275A (en)
AU (1) AUPS169302A0 (en)
WO (1) WO2003086719A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101628430B (en) * 2009-08-05 2012-05-09 厦门尚达电子绝缘材料有限公司 Reflector plate serrated knife
USD792576S1 (en) * 2015-07-30 2017-07-18 Graceland Properties, Llc Soffit vent

Citations (5)

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Publication number Priority date Publication date Assignee Title
EP0391664A1 (en) * 1989-04-04 1990-10-10 Sharp Kabushiki Kaisha Optical diffraction grating element, and optical pick-up device and optical scan device that respectively comprise optical diffraction grating element
DE9103358U1 (en) * 1991-03-19 1991-06-27 De Roos Sondermaschinen Gmbh, 4720 Beckum, De
WO1999020427A1 (en) * 1997-10-17 1999-04-29 Bishop Innovation Pty. Limited Method for manufacture of optical torque transducers
US6021000A (en) * 1996-07-09 2000-02-01 Asahi Kogaku Kogyo Kabushiki Kaisha Beam splitting diffractive optical element
US6335999B1 (en) * 1992-03-23 2002-01-01 Minnesota Mining & Mfg. Co. Multilayer luminaire device

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Publication number Priority date Publication date Assignee Title
FR2576228B1 (en) * 1985-01-23 1989-12-01 Escofier Tech Sa METHOD AND DEVICE FOR THE PRODUCTION OF GROOVES ON A REVOLUTION WALL
JP2820138B2 (en) * 1996-11-26 1998-11-05 日本電気株式会社 Light modulator
EP0892288B2 (en) * 1997-07-17 2009-01-21 Alcan Technology & Management AG Use of a rolled metal product with light diffusing surface structure
FR2797607A1 (en) * 1999-08-18 2001-02-23 Guy Delteil DEVICE FOR CREATING LESS RESISTANCE LINES ON SHEET MATERIALS

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0391664A1 (en) * 1989-04-04 1990-10-10 Sharp Kabushiki Kaisha Optical diffraction grating element, and optical pick-up device and optical scan device that respectively comprise optical diffraction grating element
DE9103358U1 (en) * 1991-03-19 1991-06-27 De Roos Sondermaschinen Gmbh, 4720 Beckum, De
US6335999B1 (en) * 1992-03-23 2002-01-01 Minnesota Mining & Mfg. Co. Multilayer luminaire device
US6021000A (en) * 1996-07-09 2000-02-01 Asahi Kogaku Kogyo Kabushiki Kaisha Beam splitting diffractive optical element
WO1999020427A1 (en) * 1997-10-17 1999-04-29 Bishop Innovation Pty. Limited Method for manufacture of optical torque transducers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO03086719A1 *

Also Published As

Publication number Publication date
EP1492650A4 (en) 2005-11-02
US20050217335A1 (en) 2005-10-06
JP2005522333A (en) 2005-07-28
AUPS169302A0 (en) 2002-05-16
KR20050005441A (en) 2005-01-13
CN1646275A (en) 2005-07-27
WO2003086719A1 (en) 2003-10-23

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