Elastic piece clamping jaw type multi-workpiece grinding clamp and using method thereof

Abstract

The invention discloses an elastic piece clamping jaw type multi-workpiece grinding clamp and a using method thereof.The elastic piece clamping jaw type multi-workpiece grinding clamp comprises a supporting device and an elastic piece clamping device, and the elastic piece clamping device is arranged on the supporting device in a separable mode; a plurality of large-end mounting holes are formed in the supporting device at intervals; the elastic piece clamping device comprises a clamp body and an elastic piece clamping assembly connected with the clamp body, small-end mounting holes are formed in the positions, corresponding to the large-end mounting holes, of the clamp body respectively, and an opening part is arranged on the side, facing the elastic piece clamping assembly, of each small-end mounting hole. And the elastic sheet clamping assembly can extend into the small-end mounting hole from the opening part or can retreat from the small-end mounting hole from the opening part. The clamping efficiency is high, batch grinding can be achieved, the yield can be increased, and the requirement of the market and a user for rapidly producing workpieces is met.

Description

Technical Field

[0001] The invention relates to a grinding fixture, and 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 needs to go through precision grinding, lapping, and polishing processes to finally make the finish surface meet the use accuracy requirements. Taking the diesel engine fuel injector as an example, the end face of the large end of the workpiece is used as a sealing surface, which belongs to the category of finish machining surface and has extremely high requirements for accuracy. When performing the grinding process of the end face of the fuel injector, the traditional grinding method is manual grinding, and it is a single piece one by one operation, and the production efficiency is extremely low. Nowadays, 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 production 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 a method of using the same, which has high clamping efficiency and is capable of batch grinding, which is beneficial to increasing production to meet the market and user needs for rapid output of workpieces.

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

[0005] Furthermore, the support device includes a support seat and a support plate, and a plurality of large-end mounting holes are arranged on the support seat at equal intervals 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 body includes an annular main body, and a plurality of small-end mounting holes are arranged at equal intervals in the circumferential direction on the annular main body, and an upper mounting groove, a middle mounting boss and a lower mounting groove are sequentially arranged in the up-down direction inside the annular main body, and the upper and lower parts of each of the small-end mounting holes are provided with the opening part, the upper opening part of each of the small-end mounting holes is connected with the upper mounting groove, and the lower opening part of each of the small-end mounting holes is connected with the lower mounting groove, the middle mounting boss protrudes radially inward from the annular main body, and a clearance hole is arranged inside the middle mounting boss.

[0007] Further, the spring clip clamping assembly includes a force-applying component and two spring clip clamping members, the two spring clip clamping members are symmetrically arranged in the upper mounting groove and the lower mounting groove respectively; the two spring clip clamping members each include a mounting plate and a plurality of spring clip bodies, the mounting plate is connected to the middle mounting boss on the radially outer side, and the mounting plate is provided with a plurality of elastic pressing portions on the radially inner side; the plurality of spring clip bodies correspond to the number and position of the plurality of small-end mounting holes; the length direction of the spring clip body is along the radial direction of the mounting plate, the radially outer side of the spring clip body is the clamping end, and the radially inner side of the spring clip body is the mounting end, the clamping end is provided with an arc groove for adapting to the small end of the workpiece on the side facing the small-end mounting hole, and a gap is provided between the clamping end and the mounting plate to allow the clamping end to be suspended, and each of the mounting ends is connected to one of the elastic pressing portions respectively; After the force-applying component applies pressure to the elastic pressing portion, the posture of the spring sheet body can be changed and the clamping end can be driven to withdraw from the small end mounting hole from the opening portion, so that the small end of the workpiece can enter and exit the small end mounting hole; when the pressure applied to the elastic pressing portion is released by the force-applying component, the elastic pressing portion restores its shape, so that the spring sheet body can restore its posture and drive the clamping end to extend from the opening portion into the small end mounting hole, so that the small end of the workpiece can be clamped and fixed in the small end mounting hole.

[0008] Furthermore, the middle portion of the mounting plate is a force-applying through hole, and a plurality of unloading grooves are evenly spaced along the circumference of the force-applying through hole on the mounting plate, and the length directions of the plurality of unloading grooves are along the radial direction of the mounting plate, the inner side of the plurality of unloading grooves is connected to the force-applying through hole, and the outer side of the plurality of unloading grooves extends into the middle portion of the mounting plate, and an elastic pressing portion is formed between two adjacent unloading grooves.

[0009] Furthermore, the force-applying component includes a tightening sleeve, a pressure cap and a threaded tensioner, wherein 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 sleeved on 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.

[0010] Further, the tightening sleeve includes a guide positioning step portion and a lower clamping step portion arranged on the lower side of the positioning step portion, the lower clamping 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 pressing cap includes an upper clamping step portion and a sleeve portion arranged on the upper side of the upper clamping step portion, the sleeve portion is sleeved on the screw portion of the threaded tightening member; the side of the lower clamping step portion facing the upper clamping step portion is a force-applying surface for contacting the elastic pressing portion.

[0011] 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 boss mounting holes are respectively provided on the clamp body corresponding to the positions of the respective mounting through holes, and the clamp body is connected to the mounting plate via a plurality of screw and nut connectors; a plurality of first positioning pin holes are provided on the mounting plate, and the spring body is provided with pin observation holes at the positions corresponding to the positioning holes, and second positioning pin holes are respectively provided 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 via a plurality of positioning pin bodies.

[0012] 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.

[0013] A method for using a spring-claw type multi-workpiece grinding fixture in the present invention uses the spring-claw type multi-workpiece grinding fixture described above, comprising the following steps: S1, inserting the large ends of multiple workpieces to be ground into the large end mounting holes respectively; 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 supporting device; 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; 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 grinder, fix the spring clip clamping device on the grinder, and simultaneously grind the lower end surfaces of the large ends of the multiple workpieces to be ground through the grinding plane of the grinder.

[0014] The beneficial effects of the present invention are: (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 operators. It is suitable for workpieces to be ground such as fuel injectors or structures similar to fuel injectors, which is conducive to increasing production and meeting the market and user needs for rapid production of workpieces.

[0015] (2) The present invention has a simple structure, is easy to use, and the forces on each part are relatively balanced when clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 It is a top view schematic diagram of the present invention; Figure 2 for Figure 1 AA cross-sectional diagram of (the workpiece to be ground is drawn with a dotted line in the figure); Figure 3 It is a top view schematic diagram of the clamp body of the present invention; Figure 4 for Figure 1 BB cross-section diagram; Figure 5 is a schematic top view of the spring clip holder of the present invention; Figure 6 is a bottom view schematic diagram of the spring clip clamp of the present invention; Figure 7 for Figure 5 Schematic diagram of CC cross section; Figure 8 for Figure 5 DD cross-sectional diagram; Fig. 9 It is a cross-sectional schematic diagram of the adapter sleeve of the present invention; Fig.10 It is a cross-sectional schematic diagram of the pressing cap of the present invention; Fig.11 It is a top view schematic diagram of the support base of the present invention; Fig.12 It is a cross-sectional schematic diagram of the support seat of the present invention.

[0017] The following are marked in the accompanying drawings: 1-clamp body, 11-small end mounting hole, 12-opening, 13-upper mounting groove, 14-middle mounting boss, 15-lower mounting groove, 16-allowance hole, 17-boss mounting hole, 18-second positioning pin hole; 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 clamping step portion, 23-pressing cap, 231-upper clamping step portion, 232-sleeve portion, 24-threaded tensioner; 3-support seat, 31-large end mounting hole; 4-support plate; 5-positioning pin body; 6-screw nut connecting piece; 7-workpiece to be ground, 71-large end of the workpiece, 72-small end of the workpiece. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1-Figure 12 As shown, a spring-claw type multi-workpiece grinding fixture in this embodiment 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 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, 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 a 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 withdraw from the small-end mounting hole 11 from the opening portion 12.

[0020] The number of the large-end mounting holes 31 and the small-end mounting holes 11 are both multiple, for example, sixteen, twelve, etc. The multiple large-end mounting holes 31 and the multiple small-end mounting holes 11 are evenly arranged and 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 the 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 structures similar to fuel injectors, which is conducive to increasing production to meet the market and user needs for rapid output of workpieces.

[0021] 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 disposed 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.

[0022] The support plate 4 can be a flat plate, and the support plate 4 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.

[0023] 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-down direction. The upper and lower parts of each of the small-end mounting holes 11 are provided with an 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.

[0024] The clamp body 1 can be used to install two spring clip clamps 21, which are symmetrical to each other and can clamp different positions of the small end 72 of the workpiece 7 to be ground, 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.

[0025] 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.

[0026] In this embodiment, 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 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 small end mounting hole 11. There is a gap between the clamping end 2121 and the mounting disk 211 to allow the clamping end 2121 to be suspended, and each mounting end 2122 is respectively connected to one of the elastic pressing portions 2111; the radial direction here is the radial direction of the mounting disk 211.

[0027] After the force-applying component 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 pressure applied to the elastic pressing portion 2111 is released by the force-applying component, 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.

[0028] The arc groove 2123 of the clamping end 2121 is adapted to the outer circular surface shape of the small end 72 of the workpiece. After the elastic pressing part 2111 is applied with pressure, the spring body 212 becomes inclined, so 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 12, which is convenient for inserting the small end 72 of the workpiece into the small end mounting hole 11 before clamping and removing the small end 72 of the workpiece after grinding. After the elastic pressing part 2111 is not applied with pressure, the elastic pressing part 2111 is in a natural state without deformation, and the spring body 212 is in a horizontal posture, so 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, and the small end 72 of the workpiece can be clamped and fixed in the small end mounting hole 11.

[0029] Since the multiple spring pieces 212 and the multiple workpieces 7 to be ground are evenly arranged and distributed in the circumferential direction at equal intervals, it is possible to ensure that the spring piece clamping member 21 is subjected to balanced force, thereby increasing its service life.

[0030] In this embodiment, the middle portion of the mounting disk 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 disk 211. The length directions of the plurality of unloading grooves 2112 are all along the radial direction of the mounting disk 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 portion of the mounting disk 211, and an elastic pressing portion 2111 is formed between two adjacent unloading grooves 2112.

[0031] 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 spring body 212 is in a horizontal posture. After the elastic pressing part 2111 is deformed, it drives the spring body 212 to change from a horizontal posture to an inclined posture.

[0032] In this embodiment, the force-applying component includes a tightening sleeve 22, a pressure cap 23 and a threaded tensioner 24. The tightening sleeve 22 is arranged below the spring clip clamping member 21 on the lower side, and the pressure cap 23 is arranged above the spring clip clamping member 21 on the upper side. The tightening sleeve 22 is threadedly connected to the threaded tensioner 24, and the pressure cap 23 is sleeved on the screw portion of the threaded tensioner 24; by tightening the threaded tensioner 24, the distance between the bolt head of the threaded tensioner 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 portions 2111 of the two spring clip clamping members 21; by loosening the threaded tensioner 24, the distance between the bolt head of the threaded tensioner 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 portion 2111.

[0033] The force applying through hole 2113 can be used to install a force applying member.

[0034] 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 clamps 21, and the elastic pressing parts 2111 of the two spring clip clamps 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.

[0035] By loosening the threaded tensioner 24, the distance between the bolt head of the threaded tensioner 24 and the fixing sleeve 22 becomes larger, so that the pressing cap 23 can 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.

[0036] In this embodiment, the tightening sleeve 22 includes a guiding 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 guiding positioning step portion 221, and the guiding positioning step portion 221 passes through the two force-applying through holes 2113; the pressing 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, the sleeve portion 232 is sleeved on 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.

[0037] The guiding and positioning step portion 221 passes through two force-applying through holes 2113, and a plurality of elastic pressing portions 2111 are evenly distributed at equal intervals in the circumferential direction. The plurality of elastic pressing portions 2111 are respectively in contact with the lower clamping step portion 222 or the upper clamping step portion 231. When pressure is applied, the force on the lower clamping step portion 222 and the upper clamping step portion 231 is balanced.

[0038] In this embodiment, the mounting disk 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, and the positions of the mounting holes 2114 on the clamp body 1 are respectively provided with boss mounting holes 17, and the clamp body 1 is connected to the mounting disk 211 through a plurality of screw and nut connectors 6; the mounting disk 211 is provided with a plurality of first positioning pin holes 2115, and the spring body 212 is provided with pin observation holes 2124 at the positions corresponding to the positioning holes, and the positions of the first positioning pin holes 2115 on the clamp body 1 are respectively provided with second positioning pin holes 18, and the clamp body 1 and the mounting disk 211 are positioned by a plurality of positioning pin bodies 5.

[0039] The installation hole 2114 is staggered with the spring body 212 to facilitate disassembly and assembly. 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.

[0040] During installation, first insert the two locating pin bodies 5 into the two second locating pin holes 18 respectively, then connect the first locating pin holes 2115 of the two mounting plates 211 with the locating 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.

[0041] 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.

[0042] 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: 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: S101, placing the support seat 3 on the support plate 4; S102 , inserting the large ends 71 ​​of the 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 .

[0043] 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 put down 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; specifically, S2 includes the following steps: 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, so that the elastic pressing parts 2111 are deformed and drive the spring body 212 from the horizontal posture to the 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; S202, aligning each small end mounting hole 11 with the position of each workpiece small end 72, 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.

[0044] 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; specifically, S3 includes the following steps: S301, loosen the threaded tensioner 24, the distance between the bolt head of the threaded tensioner 24 and the fixing sleeve 22 becomes larger, so that the pressure cap 23 can 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 with multiple workpieces 7 to be ground to form a whole. S4, separating the spring clip clamping device from the supporting device, placing the spring clip clamping device and a 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 through the grinding plane of the grinding machine; specifically, S4 comprises the following steps: S401, placing the clamp body 1 and a plurality of workpieces to be ground 7 into a grinding machine; S402, the positioning mechanism of the grinding machine fixes the clamp body 1, and the grinding plane faces the lower end surface of the large end 71 of the plurality of workpieces 7 to be ground; S403, starting the grinding machine, which drives the grinding plane to move, and grinds the lower end surfaces of the large ends 71 ​​of the multiple workpieces 7 to be ground at the same time; S404. After grinding is completed, take out the clamp 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, and the pressure cap 23 and the tightening sleeve 22 respectively apply pressure to the elastic pressing parts 2111 of the two spring clip clamps 21, and the elastic pressing parts 2111 of the two spring clip clamps 21 move toward each other, so that the elastic pressing parts 2111 are deformed and drive the spring 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 12, and the clamp body 1 is separated from each workpiece small end 72.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. 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 solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A spring-claw type multi-workpiece grinding fixture, characterized in that: The invention comprises a supporting device and a spring clip clamping device, wherein the spring clip clamping 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 clamping device comprises a clamping body (1) and a spring clip clamping 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 large end mounting holes (31); an opening (12) is provided on a side of each small end mounting hole (11) facing the spring clip clamping assembly (2); the spring clip clamping assembly (2) can extend into the small end mounting hole (11) from the opening (12) or can exit the small end mounting hole (11) from the opening (12).

2. The spring-claw type multi-workpiece grinding fixture according to claim 1 is 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 and distributed on the support seat (3); the support plate (4) is arranged on the lower side of the support plate (4) and is capable of providing 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 clamp body (1) comprises an annular body, a plurality of small end mounting holes (11) are arranged at equal intervals in a circumferential direction on the annular body, an upper mounting groove (13), a middle mounting boss (14) and a lower mounting groove (15) are sequentially arranged inside the annular body in the up-down direction, and an opening (12) is arranged at the upper and lower parts of each of the small end mounting holes (11), the upper opening (12) of each of the small end mounting holes (11) is connected to the upper mounting groove (13), and the lower opening (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 body, and a clearance hole (16) is arranged inside the middle mounting boss (14).

4. The spring-claw type multi-workpiece grinding fixture according to claim 3 is characterized in that: The spring clip clamping assembly (2) comprises a force-applying member and two spring clip clamping members (21), the two spring clip clamping members (21) being symmetrically arranged in the upper mounting groove (13) and the lower mounting groove (15), respectively; the two spring clip clamping members (21) each comprise a mounting plate (211) and a plurality of spring clip bodies (212), the mounting plate (211) being connected to the middle mounting boss (14) on the radially outer side, and the mounting plate (211) being provided with a plurality of elastic pressing portions (2111) on the radially inner side; the plurality of spring clip bodies (212) correspond in number and position to 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 outer side of the spring body (212) in the radial direction is a clamping end (2121); the inner side of the spring body (212) in the radial direction is a mounting end (2122); an arc groove (2123) for matching with the small end (72) of the workpiece is provided on the side of the clamping end (2121) 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 component applies pressure to the elastic pressing portion (2111), the posture of the spring sheet body (212) can be changed and the clamping end (2121) can be driven to withdraw from the opening portion (12) from the small end mounting hole (11), so that the small end (72) of the workpiece can enter and exit the small end mounting hole (11); when the force-applying component releases the pressure applied to the elastic pressing portion (2111), the elastic pressing portion (2111) restores its shape, so that the spring sheet 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).

5. The spring-claw type multi-workpiece grinding fixture according to claim 4 is characterized in that: 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).

6. The spring-claw type multi-workpiece grinding fixture according to claim 5, 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 clamping member (21) on the lower side; the pressure cap (23) is arranged above the spring clip clamping member (21) on the upper side; the tightening sleeve (22) is threadedly connected to the threaded tightening member (24); the pressure cap (23) is sleeved on the screw portion of the threaded tightening member (24); by tightening the threaded tightening member (24), the threaded tightening member (24) is tightened. 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-type 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, so that the pressure cap (23) can move on the screw rod to release the pressure applied to the elastic pressing parts (2111).

7. The spring-claw type multi-workpiece grinding fixture according to claim 6, characterized in that: The adapter sleeve (22) comprises 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 pressing cap (23) comprises an upper clamping step portion (231) and a sleeve portion (232) arranged on the upper side of the upper clamping step portion (231), the sleeve portion (232) being sleeved on the screw portion of the threaded tightening member (24); a surface 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).

8. The spring-claw type multi-workpiece grinding fixture according to claim 4, 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 respect to 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 positioning holes; second positioning pin holes (18) are 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 via a plurality of positioning pin bodies (5).

9. 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).

10. A method for using a spring-claw type multi-workpiece grinding fixture, characterized in that: Using the spring-claw type multi-workpiece grinding fixture as described in any one of claims 1 to 9 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, withdrawing the spring clamping assembly (2) from the opening (12) to the small end mounting hole (11), aligning each small end mounting hole (11) with the small end (72) of each workpiece to be ground (7), and lowering the clamp body (1) so that the lower end surface of the clamp 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 a plurality of 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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