TWI353282B - Clamping apparatus and clamping method using the a - Google Patents

Description

1353282

Sixth, the invention description: '[Technology of the invention belongs to the jaw] [0001] and prior to the clip and the present invention relates to a lost device and a method of losing the grip, in particular, the precise determination of the core clamping function in the processing of the related components The method of holding and holding. [Prior Art] [0002] In the field of optical technology, 'optical lenses that make up various optical systems, such as lenses, spherical mirrors, various types of aspherical mirrors, etc., must be coarsely ground, finely ground, and finely ground according to the technical requirements of optical design. Grinding, polishing, edging, etc., this process is called optical cold processing in the industry. [0003] The optical lens to be processed in optical cold working is fixed by a jig. The grinding process w is usually performed in a prior art using a centering machine. A centering machine is a machine for grinding various shapes into a circular shape. The principle is to fix a workpiece (such as a lens, etc.) with a hollow missing piece, and use a driving device such as a pump to inhale the hollow portion of the missing piece and adsorb the workpiece. On one of the clamping bodies of the clamp, after the adsorption, another identical clamping body is brought closer to the other φ end, thereby clamping and fixing the workpiece. Finally, the workpiece is centered by means of high-speed rotation to generate centrifugal force (that is, the fixture coincides with the geometric center of the workpiece), and is processed by a grinding tool such as a grinding wheel. [0004] This kind of centering machine can be widely used for rounding or rounding of general shapes. In processing, however, such a centering mechanism using centrifugal force requires high-speed rotation, which easily wears out the machine table, and its centering stability is not good. In view of the above, there is provided a holding device and a clamping method which can easily achieve fine centering in processing of an optical lens or the like. 095108188 Form No. Α0101 3rd Buy/Total 19 Pages 1003340405-0 1353282 September 16th, 100th Nuclear Replacement Page [ SUMMARY OF THE INVENTION [0006] A clamping device and a clamping method will be described below by way of specific embodiments.

[0007] a clamping device for clamping and positioning a workpiece to be processed, the clamping device comprising a pair of oppositely disposed clamping bodies, wherein the opposite end faces of the clamping body are respectively formed with clamping end faces, And at least one of the clamping bodies is internally provided with a cavity extending to one end of the clamping end; the clamping device further comprises a centering sleeve comprising a first end and a second end and having an inner portion formed therein Positioning hole and centering hole, the axial center lines of the two holes are coincident, the positioning hole is formed at the first end of the centering sleeve and extends toward the second end, and has a frustum shape, the diameter of which is from the first end The centering hole is gradually reduced from the second end; the centering hole is formed at the second end of the centering sleeve and extends toward the first end and is connected with the positioning hole, and has a cylindrical shape, and the diameter and the positioning hole are The minimum aperture is the same; wherein the positioning hole and the centering hole together conduct the centering sleeve, the centering sleeve is sleeved on the clamping body by the centering hole, and the second end is disposed away from the One side of the clamping end face is described, and the centering hole is coincident with the axial center line of the clamping body.

[0008] a clamping device for clamping and positioning a workpiece to be processed, the clamping device comprising a pair of oppositely disposed clamping bodies, wherein the opposite end faces of the clamping body are respectively formed with clamping end faces, And at least one of the clamping bodies is internally provided with a cavity extending from one end to the clamping end surface; the clamping device further comprises a centering sleeve comprising a first end and a second end and the inside is formed with a tone a positioning hole, a centering hole and a through hole, the axial center lines of the three holes are coincident, the positioning hole is formed at the first end of the centering sleeve and extends toward the second end, and has a frustum shape, the diameter of which is from One end gradually decreases toward the second end; the through hole is formed at the second end of the centering sleeve and extends toward the first end, which is 095108188 Form No. A0101 Page 4 / Total 19 Page 1003340405-0 Γ 353282 100 years 09 The replacement page has a cylindrical shape on the 16th; the centring hole is formed between the positioning hole and the through hole, and is connected with the two holes respectively, and has a cylindrical shape, and the diameter of the hole is the same as the minimum diameter of the positioning hole and is larger than The aperture of the hole; wherein the three holes together conduct the centering sleeve, The core sleeve is sleeved on the clamping body by the through hole, and the second end is disposed on a side away from the clamping end surface, and the through hole is aligned with the axial center line of the clamping body coincide.

And a clamping method comprising the steps of: firstly providing a first clamping body, an end surface of the first clamping body is formed with a clamping end surface and a cavity is opened therein, the cavity extending to one end at the end Holding the end face; and positioning a centering sleeve on the first clamping body, the centering sleeve includes a positioning hole, a centering hole and a through hole, the three holes sequentially from one end to the other end of the centering sleeve Extending and forming, wherein the positioning hole has a truncated cone shape, and the diameter thereof gradually decreases from the port inwardly, and the centring hole is connected with the positioning hole to have a cylindrical shape, and the diameter of the positioning hole and the positioning hole are the smallest. The through hole is connected to the centering hole and has a cylindrical shape, and the diameter thereof is smaller than the diameter of the centering hole. The centering sleeve is sleeved on the clamping body through the through hole, and a through hole is formed. One end of the hole is disposed away from one side of the clamping end face, and the through hole is coincident with the axial_heart line of the clamping body; secondly, the cavity is evacuated, and the workpiece is adsorbed to the Clamping the end face; and moving the centering sleeve along the axial direction of the first clamping body, The workpiece enters the centering sleeve and is centered; finally, the second clamping body is provided, and the second clamping body end surface is brought close to and contacts the workpiece, and is clamped by the first and second clamping bodies The workpiece and stop pumping. [0010] Compared with the prior art, the clamping device and the clamping method are capable of clamping and fixing a workpiece to be processed with high precision by suction suction, and 095108188 Form No. A0101 Page 5 of 19 Page 1003340405-0 1353282 On September 16th, 100th, the replacement page was quickly and accurately centered by the centering sleeve to ensure the accuracy of the machining, thus improving the quality of the workpiece after machining. [Embodiment] Hereinafter, embodiments of the present invention will be further described in detail with reference to the accompanying drawings. [0012] Referring to FIG. 1 and FIG. 2 together, the clamping device provided by the first embodiment of the present invention is used for clamping and precisely aligning a workpiece 10 (such as an optical lens) to be processed. A pair of clamping bodies 20 and 21, an air extracting device 30, and a centering sleeve 40 are included.

[0013] The clamping body 20 is formed into a cylindrical shaft body, and includes a first end 201 and a second end 202, and a distal end end of the first end 201 is formed with a clamping end surface 2011. The part directly contacting the workpiece 10 can be designed according to actual needs. A cavity 203 is defined in the clamping body 20, and the cavity 203 extends from the clamping end surface 2011 of the first end 201 toward the second end 202.

[0014] The other clamping body 21 is disposed opposite to the above-mentioned clamping body 20 and the axial center lines of the two are coincident. A clamping end surface 2111 is formed at an end of the clamping body 21 adjacent to the clamping body 20, and the clamping end surface 2111 is directly in contact with the workpiece 10, and is matched with the clamping end surface 2011 of the clamping body 20, and together The workpiece 10 is clamped. When the workpiece 10 to be processed is an optical lens, the holders 20 and 21 may be selected from brass materials that do not damage the lens. Of course, in order to reduce the cost, it is also possible to use only a special material such as brass on the end of the clamping end faces 2011 and 2111. [0015] The air extracting device 30 is configured to evacuate the cavity 203 of the clamping body 20 so as to adsorb the workpiece 10 onto the clamping end surface 2011. The air extracting device 30 can be connected to the cavity 203 of the clamping body 20 by the air suction pipe 301 by using the ventilating pipe 301 by the 095108188 form number A0101, page 6 / 19 pages 1003340405-0 1353282. It can be a pump and other equipment. [0016] The centering sleeve 40 is sleeved on the clamping body 2〇. An alignment hole 41 and a centering hole 42 are formed inside the centering sleeve 40. The positioning hole 41 is used for adjusting the position of the workpiece 1'. It is formed from one end of the first end 201 of the sin-holding body 2〇 and gradually extends toward one end of the first end 202. The positioning hole is substantially tapered. The shape of the table, that is, the diameter gradually decreases from one end of the first end 201 of the holder 20. The centering hole 42 is used for centering the workpiece 1 , and gradually extends from one end connected to the positioning hole 41 toward one end of the second end 2〇2 to form 'and is cylindrical, and The diameter of the hole is the same as the minimum diameter of the positioning hole 41. The centering hole is used for finely determining the workpiece 1,, so the diameter thereof is the same as the height of the workpiece 1垂直 perpendicular to the clamping direction. In addition, the positioning hole 41 and the centering hole 42 are electrically connected to the centering sleeve 4, and the axial center line of the two holes coincides with the axial center line of the clamping body 20, and the clip The holder 20 is matched with the centering sleeve 40 by the centering hole 42, that is, the cylindrical body 2 and the outer center of the centering hole 42 ensure coaxiality. And the unilaterally allowed tolerance system 相~5 micro-combination within the range of connection ′′, the centering sleeve 40 can be moved back and forth relative to the clamping body 20 by an external force such as a gas waste drive. [0017] Of course, the centering sleeve used in the embodiment of the present invention is secreted in the above structure and shape. As shown in FIG. 3, in the second embodiment of the present invention, the centering sleeve 5 includes a positioning hole 51, Heart hole 52 and through hole 53. Same as the first embodiment, the positioning hole 51 is used for adjusting the position of the workpiece, which is formed from the end of the holding end surface of the holding body and gradually extends away from the end of the clamping end surface, which is substantially tapered. The shape of the table, that is, from the end of the lost end face 095108188 Form No. A0101 笫 7 pages / Total 19 pages 1003340405-0 1353282 100 September 16 nuclear replacement page

The centering hole is gradually reduced; the centering hole 52 is used for centering the workpiece, and is gradually formed from one end connected to the positioning hole 51 and extends away from one end of the clamping end surface, and has a cylindrical shape. The diameter of the hole is the same as the minimum diameter of the positioning hole 51. The centering hole is used for fine centering of the workpiece, so the diameter of the workpiece is the same as the height of the workpiece perpendicular to the clamping direction. The through hole 53 is formed from an end connected to the centering hole 52 to an end opposite to the positioning hole 51. The through hole 53 matches the shape of the clamping body, and the diameter thereof is smaller than The diameter of the heart hole 5 2 . In addition, the positioning hole 51, the centering hole 52 and the through hole 53 are electrically connected to the centering sleeve 50, and the axial center line of the three holes coincides with the axial center line of the holder. Different from the first embodiment, the clamping body cooperates with the centering sleeve 50 through the through hole 53 and ensures the coaxiality between the clamping body 20 and the through hole 53 and The unilateral tolerance is allowed to be coupled within a range of 0 to 5 micrometers, whereby the centering sleeve 50 can be moved back and forth relative to the holder by an external force such as pneumatic driving. [0018] The clamping method provided by the embodiment will be described in detail below.

[0019] Referring to FIG. 1 and FIG. 4 to FIG. 6, taking the clamping device 20 in the first embodiment as an example, the workpiece 10 (such as an optical lens) is clamped and centered by the clamping device 20. The holding method comprises the following steps: [0020] First, the clamping device (as shown in FIG. 1) is set, and the cavity 203 inside the clamping body 20 is evacuated by using an air suction device such as an air pump, due to the cavity. The 203 is opened from the clamping end surface 2011 of the first end 201 to the second end 202, so that the suction force at the clamping end surface 2011 is strong, so that the workpiece 10 can be adsorbed to the clamping end surface 2011 and fixed. Live (as shown in Figure 4 095108188 Form No. A0101 Page 8 / Total 19 Page 1003340405-0 1.353282 100 September 16 Revision Replacement Page 1 [0021] • Next 'to adjust the adsorbed workpiece 10 and the holder 20 The axial center deviation moves the centering sleeve 4〇 in the axial direction of the workpiece 1〇, so that the clamping body 20 and the workpiece 10 to be adsorbed are aligned with the positioning hole 41 of the centering sleeve 4〇 The core hole 42 (shown in FIG. 5). At this time, the workpiece 1 is slanted by the inclined cone surface of the alignment hole 41 and can be along the holder 2 Position adjustment of the axial direction of the crucible. After the workpiece 10 enters the centering hole 4 2 'because the axial center line of the centering hole 4 2 coincides with the axial center line of the clamping body 20, and The diameter of the centering hole 42 matches the height of the workpiece 1 垂直 perpendicular to the clamping direction. Thus, the workpiece 10 can be centered with higher precision with respect to the holder body 20. When the workpiece 1〇 completely enters the centering hole When the middle of 42 is stopped, the movement of the centering sleeve 40 is stopped. In this step, the movement of the centering sleeve 40 can be performed by an external force such as a pneumatically driven push rod (not shown). [0022] Finally, 'ensure the centering is completed In the state of continuous pumping, the centering sleeve 40 is moved back to the original position and the workpiece 10' is exposed. At this time, the other clamping body 21 of the lost device is brought close to and contacts the other end surface of the workpiece 10, and by relative One of the settings stops the pumping after the workpieces 20 and 21 are fixed to the workpiece 1 ( ' (as shown in Fig. 6 at this time, the workpiece 10 coincides with the axial center lines of the holders 20 and 21 for subsequent processing. It can ensure accurate and stable centering. [0023] It can be understood that in the embodiment of the present invention The shape and structure of the clamping body and the centering sleeve are not limited to the above description, and can be designed according to actual needs, as long as the two are matched to achieve the effect of high-precision centering. [0024] In summary, The present invention has indeed met the requirements of the invention patent, and the patent application of 095108188 is filed according to law. However, the above description is only a preferred embodiment of the present invention, and those skilled in the art of the present invention are equivalently modified in the spirit of the invention. Or the change should be included in the following patent application form Form No. A0101 Page 9 / Total 19 Page 1003340405-0 1353282 _—Revised replacement page on September 16, 100 [Simple description] [0025] Figure 1 A schematic view of a clamping device and a workpiece according to a first embodiment of the present invention. 2 is a schematic view of a centering sleeve of a clamping device according to a first embodiment of the present invention. 3 is a schematic view of a centering sleeve of a clamping device according to a second embodiment of the present invention. 4 is a schematic view showing the adsorption of a workpiece in a clamping method according to a third embodiment of the present invention. [0029] FIG. 5 is a schematic view showing centering of a moving centering sleeve in a clamping method according to a third embodiment of the present invention. 6 is a schematic view showing a clamping device of one of the clamping devices according to the third embodiment of the present invention. [Main component symbol description] [0031] workpiece 10 clamping body 20, 21 [0032] first end 201 clamping end face 2011, 2111 [0033] second end 202 cavity 203 [0034] air suction device 30 ventilation duct 301 [0035] Centering sleeve 40, 50 positioning holes 41, 51 [0036] Centering holes 42, 52 through holes 53

095108188 Form No. A0101 Page 10 of 19 1003340405-0

Claims (1)

1353282 Correction and replacement page on September 16, 100 VII. Patent application scope: 1. A clamping device for clamping and positioning the workpiece to be processed, the clamping device And a pair of oppositely disposed clamping bodies, wherein the opposite end faces of the clamping body are respectively formed with clamping end faces, and one of the clamping bodies is internally provided with a cavity, and one end of the cavity extends to the clamping The end face is improved in that the clamping device comprises a centering sleeve comprising a first end and a second end and having a positioning hole and a centering hole formed therein, the axial center lines of the two holes are coincident, The positioning hole is formed at the first end of the centering sleeve and extends toward the second end, and has a truncated cone shape, and the diameter thereof gradually decreases from the first end to the second end; the centering hole is formed in the fixed hole The second end of the core sleeve extends toward the first end and is connected to the positioning hole, and has a cylindrical shape with a diameter equal to a minimum diameter of the positioning hole; wherein the positioning hole and the centering hole are together The centering sleeve is turned on, and the centering sleeve is sleeved on the clamping body provided with the cavity, and the second end is disposed on a side away from the clamping end surface, and Aligning the centering hole with an axial center line of the clamping body, the cavity being away from the clamping end surface An air suction device is connected to one end of the seal. 2. The holding device of claim 1, wherein the one-side fit tolerance range between the centering sleeve and the holder is 0-5 microns. 3. The holding device of claim 1, wherein the holder is a cylindrical shaft. 4. The holding device of claim 1, wherein the pumping device comprises an air pump. 5. The holding device according to claim 1, wherein the material of the holder body formed with one end of the clamping end face is brass. 6, a clamping device for clamping and positioning the workpiece to be processed, the clamping device 095108188 Form No. A0101 Page 11 of 19 1003340405-0 1353282 September 16th Nuclear Replacement Page And a pair of oppositely disposed clamping bodies, wherein the opposite end faces of the clamping body are respectively formed with clamping end faces, and one of the clamping bodies is internally provided with a cavity, and one end of the cavity extends to the clamping The end face is improved in that the clamping device comprises a centering sleeve comprising a first end and a second end and internally formed with a positioning hole, a centering hole and a through hole, wherein the axial center lines of the three holes coincide The positioning hole is formed at the first end of the centering sleeve and extends toward the second end, and has a frustum shape, and the diameter thereof gradually decreases from the first end to the second end; the through hole is formed in the The second end of the centering sleeve extends toward the first end and has a cylindrical shape; the centering hole is formed between the positioning hole and the through hole, and is respectively connected with the two holes, and has a cylindrical shape and a caliber thereof The minimum diameter of the positioning hole is the same as the diameter of the through hole; wherein the three holes together conduct the centering sleeve, and the centering sleeve is sleeved on the cavity provided by the cavity a clamping body, and the second end is disposed on a side away from the clamping end surface, and the through hole is Coinciding with the axial center line of the clamping body, a suction device is sealingly connected to one end of the cavity from the clamping end surface. 7. The clamping device of claim 6, wherein the one-sided fit tolerance range between the centering sleeve and the holder is ~5 microns. 8. The gripping device of claim 6, wherein the pumping device comprises an air pump, and the gripping device of claim 6, wherein the clamping body is formed The material having one end of the clamping end face is brass. 10. A clamping method, comprising the steps of: providing a first clamping body, the end surface of the first clamping body is formed with a clamping end surface and a cavity is opened therein, and one end of the cavity is extended To the clamping end face; a centering sleeve is disposed on the first clamping body, the centering sleeve includes a positioning hole 095108188 Form No. A0101 Page 12 / Total 19 Page 1003340405-0 Γ 353282 100 September 16 The pressing unit replaces the page, the centering hole and the through hole, and the three holes extend from one end of the center of the centering sleeve to the other end and are electrically connected thereto, wherein the positioning hole has a truncated cone shape, and the diameter thereof is from the port to the port. The centering hole is gradually reduced, and the centering hole is connected to the positioning hole in a cylindrical shape, and the diameter thereof is the same as the minimum diameter of the positioning hole, and the through hole is connected with the centering hole to have a cylindrical shape, and the diameter thereof is smaller than the centering. a hole of the hole, the centering sleeve is sleeved on the first clamping body by the through hole, and one end of the through hole is formed on a side away from the clamping end surface, and the through hole is made Coincident with the axial centerline of the holder; Using a suction device that is in sealing connection with one end of the cavity away from the clamping end surface, the cavity is evacuated to attract the workpiece to the clamping end surface; along the axis of the first clamping body Moving the centering sleeve in a direction to enter the centering sleeve and centering; providing a second clamping body, and bringing the second clamping body end surface into contact with the workpiece, by the The first and second clamping bodies clamp the workpiece and stop pumping. 11. The clamping method of claim 10, wherein the pumping device comprises a pumping fruit. 12. The clamping method of claim 10, wherein the one-sided fit tolerance range between the centering sleeve and the holder is ~5 microns. The holding method according to claim 10, wherein the material of the holding body in which one end of the clamping end face is formed is brass. 1003340405-0 095108188 Form Number A0101 Page 13 of 19