WO2022085159A1 - カーブジェネレータおよび研削方法 - Google Patents

カーブジェネレータおよび研削方法 Download PDF

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Publication number
WO2022085159A1
WO2022085159A1 PCT/JP2020/039750 JP2020039750W WO2022085159A1 WO 2022085159 A1 WO2022085159 A1 WO 2022085159A1 JP 2020039750 W JP2020039750 W JP 2020039750W WO 2022085159 A1 WO2022085159 A1 WO 2022085159A1
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WO
WIPO (PCT)
Prior art keywords
grindstone
workpiece
measuring
plane
grindstones
Prior art date
Application number
PCT/JP2020/039750
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
正成 徳山
仁太 稲田
幸治 石崎
洋 一山
律明 宮地
Original Assignee
オリンパス株式会社
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 オリンパス株式会社 filed Critical オリンパス株式会社
Priority to CN202080101216.0A priority Critical patent/CN115666850A/zh
Priority to PCT/JP2020/039750 priority patent/WO2022085159A1/ja
Priority to JP2022556334A priority patent/JP7436701B2/ja
Publication of WO2022085159A1 publication Critical patent/WO2022085159A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/04—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses involving grinding wheels controlled by gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/10—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving electrical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means

Definitions

  • the present invention relates to a curve generator and a grinding method.
  • Patent Document 1 proposes a technique for performing high-precision machining by measuring the shape data of a grindstone in advance and reflecting the measured data in a grinding apparatus.
  • Patent Document 2 proposes a technique for performing high-precision machining by measuring the shape of a grindstone in-line with a grindstone shape sensor and controlling machining conditions based on the measurement data.
  • the present invention has been made in view of the above, and an object of the present invention is to provide a curve generator and a grinding method capable of stably performing high-precision machining in machining using a cup-shaped grindstone. ..
  • the curve generator according to the present invention includes two cup-shaped grindstones having different roughness, a holding mechanism for holding a workpiece to be machined by the grindstone, and the above-mentioned.
  • the rotation axes of the two grindstones are arranged on the first plane, and the rotation axis of one of the two grindstones is the first. It is possible to swing on a second plane different from the first plane, and the axis of rotation of the other of the two grindstones is different from the first plane and parallel to the second plane.
  • the rotation axis of the holding mechanism can be positioned at any of the second plane and the third plane.
  • the drive mechanism moves the holding mechanism and the measuring mechanism along the swing axis of the rotation shafts of the two grindstones.
  • the two measuring mechanisms are provided corresponding to the two grindstones.
  • the curve generator according to the present invention includes two cup-shaped grindstones having different roughness, a holding mechanism for holding a workpiece to be machined by the grindstone, and the above-mentioned.
  • a measuring mechanism for measuring the shape of the grindstone at a portion where the grindstone comes into contact with the workpiece a driving mechanism for moving the holding mechanism and the measuring mechanism to a position facing either of the two grindstones, and the above.
  • a control device for controlling the grindstone, the holding mechanism, the measuring mechanism and the driving mechanism, and a display device for displaying predetermined information are provided, and the control device is based on the shape data of the grindstone measured by the measuring mechanism.
  • the processability of the workpiece is displayed on the display device, and the workpiece can be machined, the machining conditions are generated from the shape data of the grindstone and the generated machining is performed.
  • the work piece is processed by operating the grindstone and the holding mechanism according to the conditions.
  • the grinding method measures the shape of the first grindstone by a measuring mechanism and uses the shape data of the first grindstone measured by the measuring mechanism.
  • a machining condition is generated, the workpiece is ground by the first grindstone according to the generated machining condition, and the shape of the second grindstone having a roughness different from that of the first grindstone is measured by the measurement mechanism.
  • Machining conditions are generated from the shape data of the second grindstone measured by the measuring mechanism, and the workpiece is ground by the second grindstone according to the generated machining conditions.
  • the measuring mechanism and the workpiece can be moved to a position facing a plurality of cup-shaped grindstones, so that the complicated curved surface shape of the grindstone before machining can be accurately performed. It can be measured. Then, based on the measurement result, it is possible to control the machining conditions such as the position, rocking, and rotation speed of the grindstone, so that high-precision machining can be stably performed.
  • FIG. 1 is a schematic view showing an example of the configuration of a curve generator according to the first embodiment of the present invention.
  • FIG. 2 is a diagram for explaining a swing axis and a second plane of the grindstone in the curve generator according to the first embodiment of the present invention.
  • FIG. 3 is a diagram showing a state in which the positions of the holding mechanism and the measuring mechanism are exchanged in the curve generator of FIG.
  • FIG. 4 is a schematic view showing an example of the configuration of the curve generator according to the second embodiment of the present invention.
  • FIG. 5 is a diagram showing how the curve generator according to the second embodiment of the present invention processes the workpiece with the second grindstone and measures the shape of the first grindstone with the second measuring mechanism. be.
  • the configuration of the curve generator according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
  • the curve generator according to the present embodiment is for processing a workpiece using two cup-shaped grindstones having different roughness.
  • the curved surface (spherical surface or aspherical surface) of the workpiece is machined by rotating the grindstone and the workpiece, respectively, and relatively moving and rocking the grindstone and the workpiece.
  • FIG. 1 illustrates only the configurations necessary for the description of the present invention, and other configurations (for example, an air blow nozzle that injects air into the workpiece during machining, and a grinding fluid that injects grinding fluid into the workpiece during machining). Nozzles, etc.) are not shown. Further, in FIGS. 2 and 3, the drive mechanism 21, the control device 22, the display device 23, and the like in FIG. 1 are not shown.
  • the curve generator 1 includes a first grindstone 11, a second grindstone 13, a holding mechanism 16, a measuring mechanism 17, a driving mechanism 21, a control device 22, and a display device 23. , Is equipped. As shown in the figure, the curve generator 1 measures the mechanism for processing the workpiece W (first grindstone 11 and second grindstone 13) and the shapes of the first grindstone 11 and the second grindstone 13. The measuring mechanism 17 is arranged in the same device. Further, although the curve generator 1 includes two grindstones (first grindstone 11 and second grindstone 13), three or more grindstones may be provided.
  • the direction of the rotation axis Ax1 of the first grindstone 11 and the rotation axis Ax2 of the second grindstone 13 is the Z direction
  • the swing axis Ax3 of the first grindstone 11 and the second grindstone 13 The direction is the X direction
  • the direction perpendicular to the paper surface is the Y direction.
  • the first grindstone 11 is for grinding the workpiece W.
  • the first grindstone 11 is composed of, for example, a cup-shaped grindstone for rough grinding, which has a different roughness from the second grindstone 13. Further, the first grindstone 11 is attached to the mounting base 12.
  • the mounting base 12 is configured so that the first grindstone 11 can be attached to and detached from one end side. Further, the mounting base 12 is configured to be rotatable around the rotation axis Ax1 of the first grindstone 11 with the first grindstone 11 attached. Further, the mounting base 12 is installed on the base 15 together with the mounting base 14 to which the second grindstone 13 is mounted.
  • the second grindstone 13 is for grinding the workpiece W.
  • the second grindstone 13 is composed of, for example, a cup-shaped grindstone for fine grinding, which has a different roughness from the first grindstone 11.
  • the second grindstone 13 is attached to the mounting base 14.
  • the mounting base 14 is configured so that a second grindstone 13 can be attached to and detached from one end side.
  • the mounting base 14 is configured to be rotatable around the rotation axis Ax2 of the second grindstone 13 with the second grindstone 13 attached.
  • the mounting base 14 is installed on the base 15 together with the mounting base 12 to which the first grindstone 11 is mounted.
  • This first plane Pl1 is a plane parallel to the XZ plane in the figure.
  • the rotation axis Ax1 of the first grindstone 11 is configured to be swingable on a second plane Pl2 different from the first plane Pl1.
  • the second plane Pl2 is, for example, a plane orthogonal to the first plane Pl1 and parallel to the YZ plane in the figure. Specifically, the first grindstone 11 swings around the swing shaft Ax3 together with the second grindstone 13 together with the base 15.
  • the rotation axis Ax2 of the second grindstone 13 is configured to be swingable on a third plane different from the first plane Pl1.
  • This third plane is, for example, a plane orthogonal to the first plane Pl1 and a plane parallel to the YZ plane in FIG. Further, the third plane is a plane parallel to the second plane Pl2 shown in the figure, and is arranged on the back side of the second plane Pl2 in the X direction. Specifically, the second grindstone 13 swings around the swing shaft Ax3 together with the first grindstone 11 together with the base 15.
  • the holding mechanism 16 is for holding the workpiece W.
  • the holding mechanism 16 is configured to be movable in the X direction and the Z direction of FIG. That is, in the holding mechanism 16, the second flat surface Pl2 (see FIG. 2) in which the first grindstone 11 swings and the second grindstone 13 swing in a state where the workpiece W is attached to one end side. It is configured so that it can be positioned at any position on the third plane. Further, the holding mechanism 16 is configured to be movable to a position facing either the first grindstone 11 or the second grindstone 13 with the workpiece W attached to one end side. Further, the holding mechanism 16 is configured to be rotatable with the workpiece W attached to one end side.
  • the measuring mechanism 17 is for measuring the shapes of the first grindstone 11 and the second grindstone 13. Specifically, the measuring mechanism 17 measures the shapes of the first grindstone 11 and the second grindstone 13 at the portion where the first grindstone 11 and the second grindstone 13 come into contact with the workpiece W.
  • a contact type (mechanical) sensor, a non-contact optical sensor, a capacitance type sensor, or the like can be used, but it is preferable to use an optical sensor capable of three-dimensional measurement.
  • the optical sensor can measure the entire range instead of rotating the grindstone to measure the cross section at a predetermined angle, so it is possible to detect the occurrence of local defects such as chipping and scratches on the grindstone. Is.
  • the drive mechanism 21 is for driving the holding mechanism 16 and the measuring mechanism 17. Specifically, the drive mechanism 21 moves the holding mechanism 16 and the measuring mechanism 17 in the X direction and the Z direction of FIG. That is, when the workpiece W is ground by the first grindstone 11, the drive mechanism 21 moves the holding mechanism 16 to the position of the second plane Pl2 (see FIG. 2) along the swing axis Ax3. After that, it is moved to a position facing the first grindstone 11. Further, when the workpiece W is ground by the second grindstone 13, the drive mechanism 21 moves the holding mechanism 16 to the position of the third plane along the swing axis Ax3, and then the second one. Move it to a position facing the grindstone 13.
  • the drive mechanism 21 swaps the positions of the holding mechanism 16 and the measuring mechanism 17 to perform fine grinding by the second grindstone 13. That is, as shown in FIG. 1, the drive mechanism 21 performs rough grinding of the workpiece W by the first grindstone 11, and then, as shown in FIG. 3, positions the holding mechanism 16 and the measuring mechanism 17. Replace. As a result, the work piece W is finely ground by the second grindstone 13.
  • the control device 22 is for controlling the operation of the first grindstone 11, the second grindstone 13, the holding mechanism 16, the measuring mechanism 17, and the driving mechanism 21. Specifically, the control device 22 determines the deterioration state of the first grindstone 11 and the second grindstone 13 from the shape data of the first grindstone 11 and the second grindstone 13 measured by the measuring mechanism 17. Then, the control device 22 displays on the display device 23 information regarding whether or not the workpiece W can be machined by the first grindstone 11 and the second grindstone 13.
  • the control device 22 determines that the workpiece W can be machined by the first grindstone 11 and the second grindstone 13
  • the machining conditions are obtained from the shape data of the first grindstone 11 and the second grindstone 13.
  • the control device 22 with respect to the workpiece W based on the shape data of the first grindstone 11 and the second grindstone 13 and the target machining shape data of the workpiece W prepared in advance.
  • the coordinates of the contact points of the first grindstone 11 and the second grindstone 13 are calculated.
  • the control device 22 generates machining conditions such as the positions, swings, and rotation speeds of the first grindstone 11 and the second grindstone 13 based on the calculated coordinates of the contact points.
  • the control device 22 processes the workpiece W by operating the first grindstone 11, the second grindstone 13, and the holding mechanism 16 according to the generated machining conditions.
  • the display device 23 is for displaying predetermined information regarding the processing of the workpiece W.
  • the display device 23 has, for example, information on the shape data of the first grindstone 11 and the second grindstone 13 measured by the measuring mechanism 17 and whether or not the workpiece W can be processed by the first grindstone 11 and the second grindstone 13. Etc. are displayed.
  • the shape of the first grindstone 11 is measured by the measurement mechanism 17. Subsequently, in the first determination step, the deterioration state and the processability of the first grindstone 11 are determined from the shape data of the first grindstone 11. If it is determined in the first determination step that machining with the first grindstone 11 is possible, the process proceeds to the first machining condition generation step, and machining conditions are generated from the shape data of the first grindstone 11. Subsequently, in the first machining step, the workpiece W is ground by the first grindstone 11 according to the generated machining conditions.
  • the positions of the holding mechanism 16 and the measuring mechanism 17 are exchanged by the driving mechanism 21, and then the shape of the second grindstone 13 is measured by the measuring mechanism 17.
  • the second determination step the deterioration state and processability of the second grindstone 13 are determined from the shape data of the second grindstone 13. If it is determined in the second determination step that machining with the second grindstone 13 is possible, the process proceeds to the second machining condition generation step, and machining conditions are generated from the shape data of the second grindstone 13. Subsequently, in the second machining step, the workpiece W is ground by the second grindstone 13 according to the generated machining conditions.
  • the first grindstone 11 and the second grindstone 13 having different roughness are attached to the apparatus in advance, and the grindstone Since it is not necessary to replace the grindstone, it is possible to suppress an error in the grinding position when the grindstone is attached, and it is possible to stably process the workpiece W.
  • the measuring mechanism 17 and the workpiece W can be moved to positions facing the cup-shaped first grindstone 11 and the second grindstone 13. Therefore, it is possible to accurately measure the complicated curved surface shapes of the first grindstone 11 and the second grindstone 13 before machining. Then, based on the measurement result, for example, the machining conditions such as the position, swing, and rotation speed of the first grindstone 11 and the second grindstone 13 can be controlled, so that high-precision machining can be stably performed. It can be carried out.
  • the transition of the absolute amount of wear of the first grindstone 11 and the second grindstone 13 is also grasped by repeated measurement by the measuring mechanism 17. Therefore, it is possible to predict the wear change of the first grindstone 11 and the second grindstone 13 during machining, and it is possible to generate and control more appropriate machining conditions to realize high-precision machining.
  • the machining can be stably performed with high accuracy, so that the tact time Can be shortened and the cost can be reduced.
  • the shape data after the measurement can be measured.
  • the workpiece W can be accurately ground based on the above.
  • the rotation axis of the workpiece W, the rotation axis Ax1 of the first grindstone 11, the rotation axis Ax2 of the second grindstone 13, and the inclination of the measurement mechanism 17 can be precisely matched, for example, measurement by the measurement mechanism 17. It is also possible to attach / detach the workpiece W inside.
  • the rotation axis Ax1 of the first grindstone 11 and the rotation axis Ax2 of the second grindstone 13 are aligned and have the same flat surface as the rotation axis of the holding mechanism 16. Since it is arranged on (the second plane Pl2 or the third plane), the position control of the holding mechanism 16 and the measuring mechanism 17 becomes easy. As a result, the positioning of the first grindstone 11, the second grindstone 13, the holding mechanism 16 and the measuring mechanism 17 can be performed with higher accuracy and reproducibility. Therefore, it is possible to improve the measurement accuracy of the first grindstone 11 and the second grindstone 13, the relative position accuracy between the holding mechanism 16 and the first grindstone 11 and the second grindstone 13, and the machining accuracy of the workpiece W. can.
  • the first grindstone 11 and the first grindstone 11 are moved by the drive mechanism 21 to move the holding mechanism 16 and the measuring mechanism 17 along the swing shaft Ax3. Positioning of the second grindstone 13, the holding mechanism 16 and the measuring mechanism 17 can be performed with higher accuracy and reproducibility. Therefore, it is possible to improve the measurement accuracy of the first grindstone 11 and the second grindstone 13, the relative position accuracy between the holding mechanism 16 and the first grindstone 11 and the second grindstone 13, and the machining accuracy of the workpiece W. can.
  • the curve generator 1A includes a first grindstone 11, a second grindstone 13, a holding mechanism 16, measuring mechanisms 17, 18 and a partition plate 19.
  • the curve generator 1A has the same configuration as the curve generator 1 except that the measuring mechanism 18 and the partition plate 19 are further provided.
  • the curve generator 1A includes a drive mechanism 21, a control device 22, and a display device 23, similarly to the curve generator 1.
  • the curve generator 1A is provided with two measuring mechanisms 17 and 18 corresponding to two grindstones (first grindstone 11 and second grindstone 13).
  • the measuring mechanism 17 is for measuring the shape of the second grindstone 13.
  • the measuring mechanism 18 is for measuring the shape of the first grindstone 11.
  • the partition plate 19 is for preventing the grinding fluid from adhering to the measuring mechanisms 17 and 18 when the workpiece W is ground by the first grindstone 11 and the second grindstone 13.
  • the shape of the second grindstone 13 is measured by the measuring mechanism 17 while grinding (coarse grinding) the workpiece W by the first grindstone 11. Then, when the rough grinding and the measurement of the second grindstone 13 are completed, as shown in FIG. 5, the holding mechanism 16 and the measuring mechanisms 17 and 18 are moved in the X direction (direction of the swing axis Ax3 (see FIG. 2)). Let me. Subsequently, the shape of the first grindstone 11 is measured by the measuring mechanism 18 while grinding (finely grinding) the workpiece W by the second grindstone 13.
  • the measurement mechanism of the first grindstone 11 and the second grindstone 13 By independently providing 17 and 18 and driving the workpiece W and the measuring mechanisms 17 and 18 in a reciprocating motion, the workpiece W is processed and the first grindstone 11 and the second grindstone 13 are driven. It is possible to further improve the mechanical accuracy at the time of measurement.
  • the curve generator 1A and the grinding method according to the second embodiment are provided with dedicated measuring mechanisms 17 and 18 for each of the first grindstone 11 and the second grindstone 13, they can be calibrated individually. The measurement accuracy of the first grindstone 11 and the second grindstone 13 can be improved. Further, since it is possible to measure the shape of one of the first grindstone 11 and the second grindstone 13 while grinding the other, rough grinding and fine grinding are performed with high accuracy and continuously. be able to.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
PCT/JP2020/039750 2020-10-22 2020-10-22 カーブジェネレータおよび研削方法 WO2022085159A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202080101216.0A CN115666850A (zh) 2020-10-22 2020-10-22 曲线形成机以及磨削方法
PCT/JP2020/039750 WO2022085159A1 (ja) 2020-10-22 2020-10-22 カーブジェネレータおよび研削方法
JP2022556334A JP7436701B2 (ja) 2020-10-22 2020-10-22 カーブジェネレータ

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Application Number Priority Date Filing Date Title
PCT/JP2020/039750 WO2022085159A1 (ja) 2020-10-22 2020-10-22 カーブジェネレータおよび研削方法

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020006764A1 (en) * 2000-06-26 2002-01-17 Loh Optikmaschinen Ag Device for machining optical workpieces
JP2003150216A (ja) * 2001-11-15 2003-05-23 Ikegai Corp ワークの曲面加工システム及び曲面加工方法
JP2010094758A (ja) * 2008-10-15 2010-04-30 Hoya Corp 情報記録媒体用ガラス基板の製造方法およびその製造装置
JP2018069391A (ja) * 2016-10-31 2018-05-10 日本精工株式会社 研削装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020006764A1 (en) * 2000-06-26 2002-01-17 Loh Optikmaschinen Ag Device for machining optical workpieces
JP2003150216A (ja) * 2001-11-15 2003-05-23 Ikegai Corp ワークの曲面加工システム及び曲面加工方法
JP2010094758A (ja) * 2008-10-15 2010-04-30 Hoya Corp 情報記録媒体用ガラス基板の製造方法およびその製造装置
JP2018069391A (ja) * 2016-10-31 2018-05-10 日本精工株式会社 研削装置

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JPWO2022085159A1 (zh) 2022-04-28
CN115666850A (zh) 2023-01-31

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