Shell clip jaw multi-workpiece lapping fixture and method of using same

Abstract

The application discloses a spring piece clamping jaw type multi-workpiece grinding clamp and a use method thereof. The spring piece clamping jaw type multi-workpiece grinding clamp comprises a supporting device and a spring piece clamping device, the spring piece clamping device is arranged on the supporting device in a separable mode, a plurality of large-end mounting holes are arranged on the supporting device at intervals, the spring piece clamping device comprises a clamping body and a spring piece clamping assembly connected with the clamping body, small-end mounting holes are arranged on the clamping body in positions corresponding to the positions of the large-end mounting holes respectively, and an opening part is arranged on one side of each small-end mounting hole, facing the spring piece clamping assembly, the spring piece clamping assembly can be inserted into the small-end mounting hole from the opening part or can be withdrawn from the small-end mounting hole from the opening part. The clamping efficiency is high, and the batch grinding can improve the yield, so that the demand of the market and users for the rapid output workpiece can be met.

Description

Technical Field

[0001] The invention relates to a grinding fixture, in particular to a spring-claw type multi-workpiece grinding fixture and a use method thereof. Background Art

[0002] In the processing of high-precision parts, the finish surface of the workpiece generally undergoes precision grinding, lapping, and polishing processes to ultimately ensure that the finish surface meets the accuracy requirements for use. Taking the diesel engine fuel injector as an example, the end face of the large end of the workpiece serves as a sealing surface and belongs to the category of finish-machined surfaces, which has extremely high requirements for accuracy. When performing the grinding process of the fuel injector end face, the traditional grinding method is manual grinding, and it is a single-piece operation, which has extremely low production efficiency. Today, with the rapid development of the shipbuilding industry, the demand for fuel injectors is increasing. Obviously, the existing manual grinding process can no longer meet the demand for rapid output of fuel injectors. It is urgent to improve the grinding method and fixtures to replace the traditional manual grinding operation method. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a spring-claw type multi-workpiece grinding fixture and its use method, which has high clamping efficiency and can be used for batch grinding, which is conducive to increasing production to meet the market and user needs for rapid production of workpieces.

[0004] A spring-claw type multi-workpiece grinding fixture in the present invention includes a supporting device and a spring-claw clamping device, wherein the spring-claw clamping device is detachably arranged on the supporting device; a plurality of large-end mounting holes are arranged at intervals on the supporting device; the spring-claw clamping device includes a clamping body and a spring-claw clamping assembly connected to the clamping body, and the clamping body is respectively provided with small-end mounting holes at positions corresponding to the respective large-end mounting holes, and an opening portion is provided on the side of each small-end mounting hole facing the spring-claw clamping assembly, and the spring-claw clamping assembly can extend into the small-end mounting hole from the opening portion or can exit the small-end mounting hole from the opening portion.

[0005] Furthermore, the support device includes a support seat and a support plate, and the plurality of large-end mounting holes are evenly spaced and distributed on the support seat in a circumferential direction. The support plate is arranged on the lower side of the support plate and can provide a support surface for the lower end of each large-end mounting hole.

[0006] Further, the clamp specifically comprises a ring-shaped body, a plurality of the small-end mounting holes are arranged on the ring-shaped body in a circumferential direction at equal intervals, an upper mounting groove, a middle mounting boss and a lower mounting groove are sequentially arranged in the ring-shaped body in an up-down direction, the upper part and the lower part of each small-end mounting hole are provided with the opening part, the opening part of the upper part of each small-end mounting hole is in communication with the upper mounting groove, the opening part of the lower part of each small-end mounting hole is in communication with the lower mounting groove, the middle mounting boss protrudes inwardly from the ring-shaped body in a radial direction, and a clearance hole is arranged in the middle mounting boss.

[0007] Further, the spring clamp assembly comprises a force applying member and two spring clamps, and the two spring clamps are symmetrically arranged in the upper mounting groove and the lower mounting groove respectively; each spring clamp comprises a mounting disc and a plurality of spring bodies, the mounting disc is connected with the middle mounting boss on the outer side in a radial direction, and a plurality of elastic pressing parts are arranged on the inner side of the mounting disc in a radial direction; the number and position of the plurality of spring bodies correspond to those of the plurality of small-end mounting holes; the length direction of the spring body is along the radial direction of the mounting disc, the outer side of the spring body in a radial direction is a clamping end, the inner side of the spring body in a radial direction is a mounting end, the clamping end is provided with an arc-shaped groove for adapting to the small end of the workpiece on the side of the small-end mounting hole, and a gap is formed between the clamping end and the mounting disc to make the clamping end overhang, and each mounting end is connected with an elastic pressing part.

[0008] After the force applying member exerts pressure on the elastic pressing part, the posture of the spring body changes and the clamping end is withdrawn from the small-end mounting hole through the opening part, so that the small end of the workpiece can enter and exit the small-end mounting hole; when the force applying member removes the pressure exerted on the elastic pressing part, the elastic pressing part restores its shape, the posture of the spring body is restored and the clamping end is inserted into the small-end mounting hole through the opening part, so that the small end of the workpiece can be clamped and fixed in the small-end mounting hole.

[0009] Further, the middle part of the mounting disc is a force applying through hole, a plurality of unloading grooves are arranged on the mounting disc along the circumferential direction of the force applying through hole at equal intervals, the length direction of each unloading groove is along the radial direction of the mounting disc, the inner side of each unloading groove is in communication with the force applying through hole, and the outer side of each unloading groove extends into the middle part of the mounting disc, and each elastic pressing part is formed between two adjacent unloading grooves.

[0010] Furthermore, the force-applying component includes a tightening sleeve, a pressure cap and a threaded tensioner, the tightening sleeve is arranged below the spring clip clamping member on the lower side, the pressure cap is arranged above the spring clip clamping member on the upper side, the tightening sleeve is threadedly connected to the threaded tensioner, and the pressure cap is outermost of the screw portion of the threaded tensioner; by tightening the threaded tensioner, the distance between the bolt head of the threaded tensioner and the tightening sleeve becomes smaller, and the pressure cap and the tightening sleeve respectively apply pressure to the elastic pressing portions of the two spring clip clamping members; by loosening the threaded tensioner, the distance between the bolt head of the threaded tensioner and the tightening sleeve becomes larger, so that the pressure cap can move on the screw portion to release the pressure applied to the elastic pressing portion.

[0011] Furthermore, the adapter sleeve includes a guide positioning step portion and a lower pressing step portion arranged on the lower side of the positioning step portion, the lower pressing step portion protrudes radially outward from the guide positioning step portion, and the guide positioning step portion passes through the two force-applying through holes; the pressure cap includes an upper pressing step portion and a sleeve portion arranged on the upper side of the upper pressing step portion, the sleeve portion is outermost of the screw portion of the threaded tightening member; the side of the lower pressing step portion facing the upper pressing step portion is a force-applying surface for contacting the elastic pressing portion.

[0012] Furthermore, the mounting plate is provided with a plurality of mounting through-holes, and the plurality of mounting through-holes are staggered with the positions of the spring body, and the positions of the mounting through-holes are respectively provided with boss mounting holes on the clamp body corresponding to the positions of the respective mounting through-holes, and the clamp body is connected to the mounting plate through a plurality of screw and nut connectors; a plurality of first positioning pin holes are provided on the mounting plate, and the positions of the spring body corresponding to the first positioning pin holes are provided with pin observation holes, and the positions of the first positioning pin holes are respectively provided with second positioning pin holes on the clamp body corresponding to the positions of the respective first positioning pin holes, and the clamp body and the mounting plate are positioned by a plurality of positioning pin bodies.

[0013] Furthermore, the upper end surface of the support device abuts against the lower end surface of the clamp body, and the axes of the large end mounting hole and the small end mounting hole are perpendicular to the upper end surface of the support device or the lower end surface of the clamp body.

[0014] A method for using a spring-claw type multi-workpiece grinding fixture in the present invention includes the following steps:

[0015] S1. Insert the large ends of multiple workpieces to be ground into the large end mounting holes respectively;

[0016] S2. Withdraw the spring clamping assembly from the opening to the small end mounting hole, align each small end mounting hole with the small end of each workpiece to be ground, and lower the clamping body so that the lower end surface of the clamping body abuts against the upper end surface of the support device;

[0017] S3, extending the spring clamping assembly from the opening into the small end mounting hole, clamping and fixing the small end of the workpiece in the small end mounting hole, and completing batch clamping and positioning of multiple workpieces to be ground;

[0018] S4. Separate the spring clip clamping device from the supporting device, place the spring clip clamping device and multiple workpieces to be ground into the grinding machine, fix the spring clip clamping device on the grinding machine, and grind the lower end surfaces of the large ends of the multiple workpieces to be ground simultaneously through the grinding plane of the grinding machine.

[0019] The beneficial effects of the present invention are:

[0020] (1) The clamping efficiency of the present invention is high and batch grinding is possible, so the efficiency of the grinding process is greatly increased, which can reduce the labor intensity of the operator. It is suitable for the workpiece to be ground of the fuel injector or the workpiece with a structure similar to the fuel injector, which is conducive to increasing the output to meet the market and user's demand for rapid output of workpieces.

[0021] (2) The present invention has a simple structure and is easy to use, and the forces on each part are relatively balanced when clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration:

[0023] Figure 1 It is a top view schematic diagram of the present invention;

[0024] Figure 2 for Figure 1 AA cross-sectional diagram of FIG. 1 (the workpiece to be ground is drawn with a dotted line in the figure);

[0025] Figure 3 It is a schematic top view of the clamp body of the present invention;

[0026] Figure 4 for Figure 3 BB cross-section diagram;

[0027] Figure 5 is a schematic top view of the spring clip clamp of the present invention;

[0028] Figure 6 is a bottom view schematic diagram of the spring clip clamping member of the present invention;

[0029] Figure 7 for Figure 5 Schematic diagram of CC cross section;

[0030] Figure 8 for Figure 5 DD cross-sectional diagram;

[0031] Figure 9 is a schematic cross-sectional view of the adapter sleeve of the present invention;

[0032] Figure 10 Schematic cross-sectional view of the pressure cap of the present invention;

[0033] Figure 11 is a schematic top view of the support base of the present invention;

[0034] Figure 12 It is a cross-sectional schematic diagram of the support seat of the present invention.

[0035] The following are marked in the accompanying drawings:

[0036] 1-clamp body, 11-small end mounting hole, 12-opening, 13-upper mounting slot, 14-middle mounting boss, 15-lower mounting slot, 16-clearance hole, 17-boss mounting hole, 18-second positioning pin hole;

[0037] 2-spring clip clamping assembly, 21-spring clip clamping member, 211-mounting plate, 2111-elastic pressing portion, 2112-unloading groove, 2113-force through hole, 2114-mounting through hole, 2115-first positioning pin hole, 212-spring body, 2121-clamping end, 2122-mounting end, 2123-arc groove, 2124-pin observation hole, 22-tightening sleeve, 221-guide positioning step portion, 222-lower pressing step portion, 23-pressing cap, 231-upper pressing step portion, 232-sleeve portion, 24-threaded tightening member;

[0038] 3-support seat, 31-large end mounting hole;

[0039] 4-support plate; 5-positioning pin body; 6-screw nut connecting piece;

[0040] 7-workpiece to be ground, 71-large end of the workpiece, 72-small end of the workpiece. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0042] like Figures 1-12As shown, a spring-claw type multi-workpiece grinding fixture in this embodiment includes a supporting device and a spring-claw clamping device, and the spring-claw clamping device is arranged on the supporting device in a detachable manner; a plurality of large-end mounting holes 31 are arranged at intervals on the supporting device; the spring-claw clamping device includes a clamping body 1 and a spring-claw clamping assembly 2 connected to the clamping body 1, and the clamping body 1 is respectively provided with small-end mounting holes 11 at positions corresponding to each of the large-end mounting holes 31, and an opening portion 12 is provided on the side of each of the small-end mounting holes 11 facing the spring-claw clamping assembly 2, and the spring-claw clamping assembly 2 can extend into the small-end mounting hole 11 from the opening portion 12 or can exit the small-end mounting hole 11 from the opening portion 12.

[0043] The number of the large-end mounting holes 31 and the small-end mounting holes 11 is multiple, for example, sixteen, twelve, etc. The multiple large-end mounting holes 31 and the multiple small-end mounting holes 11 are evenly distributed at equal intervals in the circumferential direction, so that the spring clip clamping device can clamp and fix multiple workpieces 7 to be ground at the same time. Since the spring clip clamping device and the supporting device can be separated, the spring clip clamping device can be fixed and multiple workpieces 7 to be ground can be ground at the same time through the grinder in the subsequent process. Since the clamping efficiency is high and batch grinding is possible, the efficiency of the grinding process is greatly increased, which can reduce the labor intensity of the operator. It is suitable for fuel injectors or workpieces 7 to be ground with a structure similar to that of fuel injectors, which is conducive to increasing production to meet the market and user needs for rapid output of workpieces.

[0044] In this embodiment, the supporting device includes a supporting seat 3 and a supporting plate 4. A plurality of large-end mounting holes 31 are arranged at equal intervals in a circumferential direction on the supporting seat 3. The supporting plate 4 is arranged on the lower side of the supporting plate 4 and can provide a supporting surface for the lower end of each of the large-end mounting holes 31.

[0045] The support plate 4 can be a flat plate, which is used to provide support for the lower end surface of the large end 71 of the workpiece 7 to be ground. The support plate 4 can be an integral plate structure with a closed large end mounting hole 31, or a grid structure or a perforated plate structure, as long as it can provide a flat support surface for the lower end surface of the large end 71 of the workpiece.

[0046] In this embodiment, the clamp body 1 includes an annular main body, and a plurality of small-end mounting holes 11 are arranged at equal intervals in the circumferential direction on the annular main body. The interior of the annular main body is provided with an upper mounting groove 13, a middle mounting boss 14 and a lower mounting groove 15 in sequence along the up and down directions. The upper and lower parts of each of the small-end mounting holes 11 are provided with the opening portion 12. The upper opening portion 12 of each of the small-end mounting holes 11 is connected to the upper mounting groove 13, and the lower opening portion 12 of each of the small-end mounting holes 11 is connected to the lower mounting groove 15. The middle mounting boss 14 protrudes radially inward from the annular main body, and a clearance hole 16 is provided inside the middle mounting boss 14.

[0047] The clamping body 1 can be used to install two spring clip clamping parts 21. The two spring clip clamping parts 21 are symmetrical to each other and can clamp different positions of the small end 72 of the workpiece to be ground 7, ensuring the stability of the clamping and preventing the small end 72 of the workpiece from tilting, thereby ensuring the positioning accuracy of the clamping.

[0048] The diameter of the small end mounting hole 11 is 0.02 mm-0.03 mm larger than the outer diameter of the small end 72 of the workpiece, ensuring that the small end 72 of the workpiece can be inserted into the small end mounting hole 11 .

[0049] In this embodiment, the spring clip clamping assembly 2 includes a force member and two spring clip clamping members 21, and the two spring clip clamping members 21 are symmetrically arranged in the upper mounting groove 13 and the lower mounting groove 15 respectively; the two spring clip clamping members 21 each include a mounting plate 211 and a plurality of spring clip bodies 212, the mounting plate 211 is connected to the middle mounting boss 14 on the radially outer side, and the mounting plate 211 is provided with a plurality of elastic pressing portions 2111 on the radially inner side; the plurality of spring clip bodies 212 correspond to the number and position of the plurality of small end mounting holes 11; the spring clip bodies 2 The length direction of 12 is along the radial direction of the mounting disk 211, the radial outer side of the spring body 212 is the clamping end 2121, and the radial inner side of the spring body 212 is the mounting end 2122. The clamping end 2121 is provided with an arc groove 2123 for adapting to the small end 72 of the workpiece toward the side of the small end mounting hole 11, and there is a gap between the clamping end 2121 and the mounting disk 211 to allow the clamping end 2121 to be suspended in the air, and each of the mounting ends 2122 is respectively connected to one of the elastic pressing portions 2111; the radial directions here are all the radial directions of the mounting disk 211.

[0050] After the force-applying member applies pressure to the elastic pressing portion 2111, the posture of the spring body 212 can be changed and the clamping end 2121 can be driven to withdraw from the small end mounting hole 11 from the opening portion 12, so that the small end 72 of the workpiece can enter and exit the small end mounting hole 11; when the force-applying member releases the pressure applied to the elastic pressing portion 2111, the elastic pressing portion 2111 restores its shape, so that the spring body 212 can restore its posture and drive the clamping end 2121 to extend from the opening portion 12 into the small end mounting hole 11, so that the small end 72 of the workpiece can be clamped and fixed to the small end mounting hole 11.

[0051] The arcuate groove 2123 of the clamping end 2121 is adapted to the outer surface shape of the workpiece small end 72. After the elastic pressing portion 2111 is applied with pressure, the spring body 212 becomes inclined, so that the distance between the arcuate groove 2123 of the clamping end 2121 and its own central axis becomes smaller, and the clamping end 2121 withdraws from the small end mounting hole 11 from the opening portion 12, which makes it convenient to insert the workpiece small end 72 into the small end mounting hole 11 before clamping and to remove the workpiece small end 72 after grinding. After the elastic pressing portion 2111 is not applied with pressure, the elastic pressing portion 2111 is in a natural state without deformation, and the spring body 212 is in a horizontal position, so that the distance between the arcuate groove 2123 of the clamping end 2121 and its own central axis becomes larger, and the clamping end 2121 extends from the opening portion 12 into the small end mounting hole 11, at which time the workpiece small end 72 can be clamped and fixed in the small end mounting hole 11.

[0052] Since the multiple spring pieces 212 and the multiple workpieces 7 to be ground are evenly distributed and arranged at equal intervals in the circumferential direction, it is possible to ensure that the spring piece clamping member 21 is subjected to balanced force, thereby improving its service life.

[0053] In this embodiment, the middle part of the mounting plate 211 is a force-applying through hole 2113, and a plurality of unloading grooves 2112 are evenly spaced along the circumference of the force-applying through hole 2113 on the mounting plate 211. The length directions of the plurality of unloading grooves 2112 are all along the radial direction of the mounting plate 211, the inner side of the plurality of unloading grooves 2112 is connected to the force-applying through hole 2113, and the outer side of the plurality of unloading grooves 2112 extends into the middle part of the mounting plate 211, and an elastic pressing portion 2111 is formed between two adjacent unloading grooves 2112.

[0054] The unloading groove 2112 can ensure that the elastic pressing part 2111 can be deformed. When the elastic pressing part 2111 is not deformed, the elastic sheet body 212 is in a horizontal posture. After the elastic pressing part 2111 is deformed, it drives the elastic sheet body 212 from a horizontal posture to an inclined posture.

[0055] In this embodiment, the force-applying component includes a tightening sleeve 22, a pressure cap 23 and a threaded tightening piece 24. The tightening sleeve 22 is arranged below the spring clip clamping piece 21 on the lower side, and the pressure cap 23 is arranged above the spring clip clamping piece 21 on the upper side. The tightening sleeve 22 is threadedly connected to the threaded tightening piece 24, and the pressure cap 23 is sleeved on the screw portion of the threaded tightening piece 24; by tightening the threaded tightening piece 24, the distance between the bolt head of the threaded tightening piece 24 and the tightening sleeve 22 becomes smaller, and the pressure cap 23 and the tightening sleeve 22 respectively apply pressure to the elastic pressing parts 2111 of the two spring clip clamping pieces 21; by loosening the threaded tightening piece 24, the distance between the bolt head of the threaded tightening piece 24 and the tightening sleeve 22 becomes larger, so that the pressure cap 23 can move on the screw portion to release the pressure applied to the elastic pressing part 2111.

[0056] The force-applying through hole 2113 can be used to install a force-applying member.

[0057] When the threaded tightening piece 24 is tightened, the distance between the bolt head of the threaded tightening piece 24 and the tightening sleeve 22 becomes smaller, and the pressure cap 23 and the tightening sleeve 22 respectively apply pressure to the elastic pressing parts 2111 of the two spring clip clamping pieces 21. The elastic pressing parts 2111 of the two spring clip clamping pieces 21 move toward each other, thereby deforming the elastic pressing parts 2111 and driving the spring body 212 from a horizontal posture to an inclined posture.

[0058] By loosening the threaded tightening piece 24, the distance between the bolt head of the threaded tightening piece 24 and the tightening sleeve 22 becomes larger, which enables the pressure cap 23 to move on the screw part to release the pressure applied to the elastic pressing part 2111, and the elastic pressing part 2111 restores its shape, and the spring body 212 returns to a horizontal posture.

[0059] In this embodiment, the tightening sleeve 22 includes a guide positioning step portion 221 and a lower clamping step portion 222 arranged on the lower side of the positioning step portion, the lower clamping step portion 222 protrudes radially outward from the guide positioning step portion 221, and the guide positioning step portion 221 passes through the two force-applying through holes 2113; the pressure cap 23 includes an upper clamping step portion 231 and a sleeve portion 232 arranged on the upper side of the upper clamping step portion 231, and the sleeve portion 232 is outermost of the screw portion of the threaded tightening member 24; the side of the lower clamping step portion 222 facing the upper clamping step portion 231 is a force-applying surface for contacting the elastic pressing portion 2111.

[0060] The guiding and positioning step portion 221 passes through two force-applying through holes 2113, and multiple elastic pressing portions 2111 are evenly distributed at equal intervals in the circumferential direction. The multiple elastic pressing portions 2111 are in contact with the lower clamping step portion 222 or the upper clamping step portion 231 respectively. When pressure is applied, the force on the lower clamping step portion 222 and the upper clamping step portion 231 is balanced.

[0061] In this embodiment, a plurality of mounting holes 2114 are provided on the mounting plate 211, and the plurality of mounting holes 2114 are staggered with the positions of the spring body 212, and boss mounting holes 17 are respectively provided on the clamp body 1 at positions corresponding to the respective mounting holes 2114, and the clamp body 1 and the mounting plate 211 are connected through a plurality of screw and nut connectors 6; a plurality of first positioning pin holes 2115 are provided on the mounting plate 211, and the spring body 212 is provided with pin observation holes 2124 at positions corresponding to the first positioning pin holes 2115, and a second positioning pin hole 18 is respectively provided on the clamp body 1 at positions corresponding to the respective first positioning pin holes 2115, and the clamp body 1 and the mounting plate 211 are positioned through a plurality of positioning pin bodies 5.

[0062] The mounting hole 2114 is staggered with the spring body 212 to facilitate assembly and disassembly. The positioning pin body 5 cooperates with the first positioning pin hole 2115 and the second positioning pin hole 18 at the same time. By positioning before installation, the pin observation hole 2124 can observe the position of the positioning pin body 5 and the first positioning pin hole 2115 during installation.

[0063] During installation, first insert the two positioning pin bodies 5 into the two second positioning pin holes 18 respectively, then dock the first positioning pin holes 2115 of the two mounting plates 211 with the positioning pin bodies 5 respectively, and finally, the screws pass through the first mounting plate 211, the clamp body 1 and the second mounting plate 211 in turn and are threadedly connected with the nuts, so that the mounting plate 211 is connected to the clamp body 1 through the screw-nut connector 6.

[0064] In this embodiment, the upper end surface of the support device abuts against the lower end surface of the clamp body 1, and the axes of the large end mounting hole 31 and the small end mounting hole 11 are perpendicular to the upper end surface of the support device or the lower end surface of the clamp body 1.

[0065] A method for using a spring-claw type multi-workpiece grinding fixture in this embodiment, using the spring-claw type multi-workpiece grinding fixture described above, includes the following steps:

[0066] S1, inserting the large ends 71 ​​of the multiple workpieces 7 to be ground into the large end mounting holes 31 respectively; specifically, S1 includes the following steps:

[0067] S101, placing the support base 3 on the support plate 4;

[0068] S102 , inserting the large ends 71 ​​of the multiple workpieces 7 to be ground into the large end mounting holes 31 respectively, so that the lower end surface of the large end 71 of each workpiece 7 to be ground abuts against the support plate 4 .

[0069] S2, withdraw the spring clip clamping assembly 2 from the opening 12 to the small end mounting hole 11, align each small end mounting hole 11 with the small end 72 of each workpiece to be ground 7, and lower the clamping body 1 so that the lower end surface of the clamping body 1 abuts against the upper end surface of the support device; specifically, S2 includes the following steps:

[0070] S201, tighten the threaded tightening member 24, the distance between the bolt head of the threaded tightening member 24 and the adapter sleeve 22 becomes smaller, the pressure cap 23 and the adapter sleeve 22 respectively apply pressure to the elastic pressing parts 2111 of the two spring clip clamping members 21, and the elastic pressing parts 2111 of the two spring clip clamping members 21 move toward each other, thereby deforming the elastic pressing parts 2111 and driving the spring body 212 from a horizontal posture to an inclined posture; the distance between the arc-shaped groove 2123 of the clamping end 2121 and its own central axis becomes smaller, and the clamping end 2121 exits the small end mounting hole 11 from the opening 12;

[0071] S202 , aligning the small-end mounting holes 11 with the positions of the small ends 72 of the workpieces, lowering the clamp body 1 so that the lower end surface of the clamp body 1 abuts against the upper end surface of the supporting device.

[0072] S3, extending the spring clamping assembly 2 from the opening 12 into the small end mounting hole 11, clamping and fixing the small end 72 of the workpiece to be ground in the small end mounting hole 11, and completing the batch clamping and positioning of multiple workpieces 7 to be ground; specifically, S3 includes the following steps:

[0073] S301, loosen the threaded tightening piece 24, the distance between the bolt head of the threaded tightening piece 24 and the tightening sleeve 22 becomes larger, which can make the pressure cap 23 move on the screw part to release the pressure applied to the elastic pressing part 2111, the elastic pressing part 2111 restores its shape, and the spring body 212 returns to a horizontal posture; the distance between the arc groove 2123 of the clamping end 2121 and its own central axis becomes larger, and the clamping end 2121 extends from the opening 12 into the small end mounting hole 11, at this time the small end 72 of the workpiece is clamped and fixed in the small end mounting hole 11, and the clamping body 1 is connected to the multiple workpieces 7 to be ground into a whole.

[0074] S4, separating the spring clip clamping device from the supporting device, placing the spring clip clamping device and the plurality of workpieces to be ground 7 into a grinding machine, fixing the spring clip clamping device in the grinding machine, and simultaneously grinding the lower end surfaces of the large ends 71 ​​of the plurality of workpieces to be ground 7 by the grinding plane of the grinding machine; specifically, S4 includes the following steps:

[0075] S401, placing the clamp body 1 and the plurality of workpieces to be ground 7 into a grinding machine;

[0076] S402, the positioning mechanism of the grinding machine fixes the clamp body 1, with the grinding plane facing the lower end surfaces of the large ends 71 ​​of the multiple workpieces 7 to be ground;

[0077] S403, starting the grinding machine, which drives the grinding plane to move, and simultaneously grinds the lower end surfaces of the large ends 71 ​​of the multiple workpieces 7 to be ground;

[0078] S404. After the grinding is completed, take out the clamping body 1 and place the large end 71 of the ground workpiece on the unloading platform; tighten the threaded tightening piece 24, and the distance between the bolt head of the threaded tightening piece 24 and the tightening sleeve 22 becomes smaller. The pressure cap 23 and the tightening sleeve 22 respectively apply pressure to the elastic pressing parts 2111 of the two spring clip clamping pieces 21, and the elastic pressing parts 2111 of the two spring clip clamping pieces 21 move toward each other, thereby deforming the elastic pressing parts 2111 and driving the spring clip body 212 from a horizontal posture to an inclined posture; the distance between the arc groove 2123 of the clamping end 2121 and its own central axis becomes smaller, and the clamping end 2121 withdraws from the small end mounting hole 11 from the opening part 12, separating the clamping body 1 from each workpiece small end 72.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A spring-claw type multi-workpiece grinding fixture, characterized by: It comprises a supporting device and a spring clip holding device, wherein the spring clip holding device is detachably arranged on the supporting device; a plurality of large end mounting holes (31) are arranged at intervals on the supporting device; the spring clip holding device comprises a clamping body (1) and a spring clip holding assembly (2) connected to the clamping body (1); the clamping body (1) is provided with small end mounting holes (11) at positions corresponding to the respective large end mounting holes (31); an opening portion (12) is provided on a side of each of the small end mounting holes (11) facing the spring clip holding assembly (2); the spring clip holding assembly (2) can extend into the small end mounting hole (11) from the opening portion (12) or can exit the small end mounting hole (11) from the opening portion (12); The clamp body (1) includes an annular body, a plurality of small end mounting holes (11) are arranged at equal intervals in the circumferential direction on the annular body, an upper mounting groove (13), a middle mounting boss (14) and a lower mounting groove (15) are sequentially provided inside the annular body in the up-down direction, and the upper and lower parts of each small end mounting hole (11) are provided with the opening portion (12), the upper opening portion (12) of each small end mounting hole (11) is connected to the upper mounting groove (13), and the lower opening portion (12) of each small end mounting hole (11) is connected to the lower mounting groove (15), the middle mounting boss (14) protrudes radially inward from the annular body, and a clearance hole (16) is provided inside the middle mounting boss (14); The spring clip clamping assembly (2) includes a force-applying member and two spring clip clamping members (21), and the two spring clip clamping members (21) are symmetrically arranged in the upper mounting groove (13) and the lower mounting groove (15), respectively; the two spring clip clamping members (21) each include a mounting plate (211) and a plurality of spring clip bodies (212), the mounting plate (211) is connected to the middle mounting boss (14) on the radially outer side, and the mounting plate (211) is provided with a plurality of elastic pressing portions (2111) on the radially inner side; the plurality of spring clip bodies (212) correspond to the number and position of the plurality of small-end mounting holes (11); The length direction of the spring body (212) is along the radial direction of the mounting plate (211); the radially outer side of the spring body (212) is a clamping end (2121); the radially inner side of the spring body (212) is a mounting end (2122); the clamping end (2121) is provided with an arc groove (2123) for matching with the small end (72) of the workpiece on the side facing the small end mounting hole (11); a gap is provided between the clamping end (2121) and the mounting plate (211) so that the clamping end (2121) is suspended in the air; and each mounting end (2122) is respectively connected to one of the elastic pressing portions (2111); After the force-applying member applies pressure to the elastic pressing portion (2111), the posture of the spring body (212) can be changed and the clamping end (2121) can be driven to withdraw from the small end mounting hole (11) from the opening portion (12), so that the small end (72) of the workpiece can enter and exit the small end mounting hole (11); when the force-applying member releases the pressure applied to the elastic pressing portion (2111), the elastic pressing portion (2111) restores its shape, so that the spring body (212) can be restored to its posture and the clamping end (2121) can be driven to extend from the opening portion (12) into the small end mounting hole (11), so that the small end (72) of the workpiece can be clamped and fixed to the small end mounting hole (11); The middle part of the mounting plate (211) is a force-applying through hole (2113), and a plurality of unloading grooves (2112) are arranged on the mounting plate (211) at equal intervals along the circumference of the force-applying through hole (2113). The length directions of the plurality of unloading grooves (2112) are all along the radial direction of the mounting plate (211), the inner sides of the plurality of unloading grooves (2112) are connected to the force-applying through hole (2113), and the outer sides of the plurality of unloading grooves (2112) extend into the middle part of the mounting plate (211), and an elastic pressing portion (2111) is formed between two adjacent unloading grooves (2112).

2. The spring-claw type multi-workpiece grinding fixture according to claim 1, characterized in that: The support device comprises a support seat (3) and a support plate (4); a plurality of large-end mounting holes (31) are arranged at equal intervals in a circumferential direction on the support seat (3); and the support plate (4) is arranged on the lower side of the support plate (4) and can provide a support surface for the lower end of each of the large-end mounting holes (31).

3. The spring-claw type multi-workpiece grinding fixture according to claim 1, characterized in that: The force-applying member comprises a tightening sleeve (22), a pressure cap (23) and a threaded tightening member (24); the tightening sleeve (22) is arranged below the spring clip holder (21) on the lower side; the pressure cap (23) is arranged above the spring clip holder (21) on the upper side; the tightening sleeve (22) is threadedly connected to the threaded tightening member (24); the pressure cap (23) is sheathed on the screw portion of the threaded tightening member (24); by tightening the threaded tightening member (24), the threaded tightening member The distance between the bolt head of the threaded tightening member (24) and the tightening sleeve (22) becomes smaller, and the pressure cap (23) and the tightening sleeve (22) respectively apply pressure to the elastic pressing parts (2111) of the two spring clip clamping members (21); by loosening the threaded tightening member (24), the distance between the bolt head of the threaded tightening member (24) and the tightening sleeve (22) becomes larger, and the pressure cap (23) can be moved on the screw portion to release the pressure applied to the elastic pressing parts (2111).

4. The spring-claw type multi-workpiece grinding fixture according to claim 3, characterized in that: The adapter sleeve (22) comprises a guide positioning step portion (221) and a lower pressing step portion (222) arranged on the lower side of the positioning step portion, the lower pressing step portion (222) protrudes radially outward from the guide positioning step portion (221), and the guide positioning step portion (221) passes through the two force-applying through holes (2113); the pressing cap (23) comprises an upper pressing step portion (231) and a sleeve portion (232) arranged on the upper side of the upper pressing step portion (231), the sleeve portion (232) is externally mounted on the screw portion of the threaded tightening member (24); the side of the lower pressing step portion (222) facing the upper pressing step portion (231) is a force-applying surface for contacting the elastic pressing portion (2111).

5. The spring-claw type multi-workpiece grinding fixture according to claim 1, characterized in that: The mounting plate (211) is provided with a plurality of mounting holes (2114), and the plurality of mounting holes (2114) are staggered with the positions of the spring body (212); boss mounting holes (17) are respectively provided on the clamp body (1) at positions corresponding to the respective mounting holes (2114); the clamp body (1) and the mounting plate (211) are connected via a plurality of screw and nut connectors (6); the mounting plate (211) is provided with a plurality of first positioning pin holes (2115); the spring body (212) is provided with pin observation holes (2124) at positions corresponding to the first positioning pin holes (2115); the clamp body (1) is provided with second positioning pin holes (18) at positions corresponding to the respective first positioning pin holes (2115); the clamp body (1) and the mounting plate (211) are positioned via a plurality of positioning pin bodies (5).

6. The spring-claw type multi-workpiece grinding fixture according to claim 1, characterized in that: The upper end surface of the support device abuts against the lower end surface of the clamp body (1), and the axes of the large end mounting hole (31) and the small end mounting hole (11) are perpendicular to the upper end surface of the support device or the lower end surface of the clamp body (1).

7. A method for using a spring-claw type multi-workpiece grinding fixture, characterized in that: Using the spring-claw type multi-workpiece grinding fixture according to any one of claims 1 to 6 comprises the following steps: S1, inserting the large ends (71) of a plurality of workpieces (7) to be ground into the large end mounting holes (31) respectively; S2, withdraw the spring clamping assembly (2) from the opening (12) to the small end mounting hole (11), align each small end mounting hole (11) with the small end (72) of each workpiece to be ground (7), and lower the clamping body (1) so that the lower end surface of the clamping body (1) abuts against the upper end surface of the support device; S3, extending the spring clamping assembly (2) from the opening (12) into the small end mounting hole (11), clamping and fixing the small end (72) of the workpiece to the small end mounting hole (11), and completing batch clamping and positioning of multiple workpieces (7) to be ground; S4, separating the spring clip clamping device from the supporting device, placing the spring clip clamping device and the plurality of workpieces to be ground (7) into a grinding machine, fixing the spring clip clamping device on the grinding machine, and simultaneously grinding the lower end surfaces of the large ends (71) of the plurality of workpieces to be ground (7) through the grinding plane of the grinding machine.

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