Work fixture used for connecting rod machining and capable of switching machining faces

Abstract

The invention belongs to the technical field of diesel engine accessory machining devices, and discloses a tool clamp used for connecting rod machining and capable of switching machining faces. The tool clamp comprises a clamp body and a connecting piece arranged on the clamp body, and the connecting piece is used for enabling the clamp body to be detachably connected with a machining tool. The clamp main body can be replaced so as to fix and switch a machining part of a machining surface; a guide part is arranged on the clamp body, a pressing plate and a fixing part used for fixing the pressing plate are arranged on the guide part, and the pressing plate is used for pressing a machined part on the clamp body. A stop pin and a positioning pin are arranged on the clamp main body; according to the fixture, the fixture body is detachably connected with the machining tool through the connecting piece, the fixture body can be detached for replacement, so that a fixture for fixing is replaced when a machining surface of a machined part is switched, stable fixing of the machined part is ensured, meanwhile, the machined part is limited by the stop pin and the positioning pin, stable fixing of the machined part by the fixture is ensured, and the machining efficiency is improved. The machining precision of the machined part is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of diesel engine parts processing devices, in particular to a tooling fixture with switchable processing surfaces for connecting rod processing. Background Art

[0002] As a key component connecting the piston and the crankshaft, the machining accuracy and quality of the diesel engine connecting rod are directly related to the overall performance and reliability of the diesel engine. Before the connecting rod is processed (the processed connecting rod refers to the connecting rod cap), a clamp is needed to fix the connecting rod cap. After one processing surface of the connecting rod cap is processed and other surfaces need to be processed, the connecting rod cap is generally turned and then fixed directly with the same clamp. Due to the different shapes of the various surfaces of the connecting rod cap, the contact between the clamp and the turned connecting rod cap is insufficient, resulting in unstable fixation of the clamp to the workpiece after switching the processing surface, which will affect the accuracy of the connecting rod processing. Summary of the invention

[0003] The object of the present invention is to provide a tooling fixture with switchable processing surfaces for connecting rod processing, so as to solve the problem raised in the above-mentioned background technology that when one processing surface of a connecting rod cover needs to be processed after other surfaces are processed, the connecting rod cover is generally turned and then fixed directly with the same fixture, which will result in insufficient contact between the fixture and the connecting rod cover, resulting in unstable fixation of the fixture to the workpiece after the processing surface is switched.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a tooling fixture with switchable processing surface for connecting rod processing, comprising: a fixture body and a connecting piece provided on the fixture body, wherein the connecting piece is used to detachably connect the fixture body to a processing machine tool, so that the fixture body can be replaced to fix the processing piece with the switched processing surface;

[0005] The fixture body is provided with a guide member, the guide member is provided with a pressing plate and a fixing member for fixing the pressing plate, and the pressing plate is used to press the workpiece onto the fixture body;

[0006] The clamp body is provided with a stop pin and a positioning pin to limit the processing workpiece on the clamp body.

[0007] Preferably, the guide member, fixing member, pressure plate, stop pin and positioning pin constitute a positioning assembly, and there are two positioning assemblies, and one positioning assembly has several guide members, fixing members and pressure plates, which correspond to each other one by one.

[0008] Preferably, the clamp body is detachably provided with a support member for supporting the pressure plate.

[0009] Preferably, a pad for supporting the workpiece is provided on the fixture body, and the pad is detachably mounted on the fixture body by screws.

[0010] Preferably, a lifting eye screw is provided on the clamp body.

[0011] Preferably, the pressing plate is provided with an opening extending along the length direction of the pressing plate, and the guide member passes through the opening.

[0012] Preferably, a slot is provided on the top of the pressing plate, a moving block and a spring member connected to the moving block are slidably provided in the slot, a mounting slot is provided on the bottom of the pressing plate, a pressing block is provided in the mounting slot, and a push rod is provided between the pressing block and the moving block;

[0013] Wherein, the pressing block comprises a mounting block and an elastic block arranged on the mounting block.

[0014] Preferably, a groove is provided on the side wall of the mounting block, and a push block located in the groove is provided on the inner side wall of the mounting groove, and the push block is used to push the mounting block to move horizontally when the mounting block moves downward.

[0015] Preferably, an air storage tank is provided in the elastic block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present application, the fixture body is detachably connected to the processing machine tool through a connecting piece, so that the fixture body can be removed for replacement, so as to replace the fixture for fixing when the workpiece switches the processing surface, ensuring that the workpiece is fixed stably, and at the same time, the stop pin and the positioning pin limit the workpiece, ensuring that the fixture fixes the workpiece stably, and ensuring the processing accuracy of the workpiece;

[0018] In the present application, when the fixing part moves downward to fix the pressure plate, the push rod and the pressure block will also move downward, so that the pressure block can fully contact with the workpiece, and at the same time increase the friction between the pressure block and the workpiece, so that the workpiece is fixed and stable, and the pressure block will also exert a force on the workpiece to move closer to the guide part when moving downward, to ensure that the workpiece will not fall out of the fixture, thereby further ensuring the processing accuracy of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of an embodiment of a fixture for fixing a workpiece according to the present invention;

[0020] Figure 2 It is a schematic diagram of another embodiment of the tooling fixture of the present invention for fixing a workpiece;

[0021] Figure 3 It is a schematic structural diagram of an embodiment of the fixture of the present invention;

[0022] Figure 4 It is a schematic structural diagram of another embodiment of the fixture of the present invention;

[0023] Figure 5 It is a schematic diagram of the connection structure between the clamp body and the connecting piece of the present invention;

[0024] Figure 6 This is a schematic diagram of the cross-sectional structure of the connection between the pressing plate and the pressing block of the present invention;

[0025] Figure 7 For the present invention Figure 6 A schematic diagram of the enlarged structure in the middle.

[0026] In the figure: 1. fixture body; 2. guide member; 3. fixing member; 4. pressure plate; 5. supporting member; 6. stop pin; 7. positioning pin; 8. spacer block; 9. screw; 10. eye screw; 11. opening; 12. slot; 13. moving block; 14. spring member; 15. push rod; 16. mounting groove; 17. pressure block; 171. mounting block; 172. elastic block; 173. air storage tank; 18. push block; 19. groove; 20. connecting member. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example 1

[0029] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A tooling fixture with switchable processing surfaces for connecting rod processing includes: a fixture body 1, a connecting piece 20 (such as a plug block, a latch, etc.) is installed at the bottom of the fixture body 1, and the connecting piece 20 is installed on a processing machine tool and fixed so that the fixture body 1 can be detachably connected to the processing machine tool.

[0030] See also Figure 1 , Figure 2 , Figure 3 and Figure 4A guide member 2 (stud bolt) is provided on the top wall of the clamp body 1, one end of the guide member 2 is screwed to the top wall of the clamp body 1, a pressure plate 4 is slidably sleeved on the outer wall of the guide member 2 (the pressure plate 4 can move along the length direction of the guide member 2), and a fixing member 3 (nut, which is sleeved on the other end of the stud bolt) is provided on the guide member 2, and the fixing member 3 is above the pressure plate 4; a stop pin 6 and a positioning pin 7 are provided on the top wall of the clamp body 1 (both of which are equipped with bolts at the bottom, and screw holes are provided on the top wall of the clamp body 1, and the bolts are screwed in the screw holes, so that the stop pin 6 and the positioning pin 7 can be detachably installed on the top wall of the clamp body 1).

[0031] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The guide member 2, the fixing member 3, the pressure plate 4, the stop pin 6 and the positioning pin 7 constitute a positioning assembly. There are two positioning assemblies. One positioning assembly has several guide members 2, fixing members 3 and pressure plates 4 and they correspond to each other one by one. The positioning assembly is used to fix the workpiece on the top of the fixture body 1. The two positioning assemblies can fix two workpieces. The workpiece in this application refers to the connecting rod cover.

[0032] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The top wall of the clamp body 1 is provided with a support member 5 (support rod), and the support member 5 is located at the bottom of the pressure plate 4. The number of the support members 5 is the same as the number of the pressure plates 4, and the two correspond one to one. The support member 5 can be detachably installed on the top wall of the clamp body 1 by means of a threaded connection.

[0033] See also Figure 3 and Figure 4 The top wall of the fixture body 1 is provided with two pads 8 , and the pads 8 are detachably mounted on the fixture body 1 by screws 9 , and the processed workpiece is placed on the top wall of the pads 8 .

[0034] See also Figure 3 and Figure 4 A lifting eye screw 10 is provided on the top wall of the fixture body 1 (the two are connected by threads); an opening 11 is penetrated through the top wall of the pressing plate 4, and the opening 11 extends along the length direction of the pressing plate 4, and the guide member 2 passes through the opening 11; the pressing plate 4 can move horizontally on the outer wall of the guide member 2, which is used to adjust the horizontal position of the pressing plate 4, so that the bottom of the pressing plate 4 can fully contact the top of the workpiece, ensuring that the workpiece is fixed and stable.

[0035] It should be noted that the workpiece is placed on the top of the cushion block 8 so that the workpiece is at the bottom of the pressure plate 4, and the stop pin 6 and the positioning pin 7 hold the workpiece against the workpiece, and then the fixing member 3 is rotated to move it downward to contact the top of the pressure plate 4 to fix the pressure plate 4; the pressure plate 4 fixes the workpiece on the top of the fixture body 1; Figure 3 and Figure 4 These are views of the two types of fixtures. Figure 1 and Figure 2 This is a view of the two types of clamps fixing the workpiece. The pads 8, stop pins 6 and locating pins 7 of the two clamps are set in different positions so that when the workpiece is placed in different directions, the above components can fully contact the workpiece, ensuring that the clamp can stably fix the workpiece; after one processing surface of the workpiece is processed, when it is necessary to process another processing surface of the workpiece, disconnect the connecting piece 20 from the clamp body 1, replace the clamp body 1, and repeat the above fixing operation to fix the workpiece with the replaced processing surface.

[0036] Example 2

[0037] As a further optimized solution of Example 1, please refer to Figure 6 A slot 12 is provided on the top of the pressure plate 4, a moving block 13 is slidably inserted in the inner cavity of the slot 12, a spring member 14 (spring) is installed between the slot 12 and the moving block 13, a mounting slot 16 is provided on the bottom of the pressure plate 4, a pressing block 17 is provided in the inner cavity of the mounting slot 16, a push rod 15 is provided on the bottom of the moving block 13, and the bottom end of the push rod 15 is connected to the pressing block 17; the pressing block 17 includes a mounting block 171 and an elastic block 172 (made of rubber) provided on the bottom wall of the mounting block 171, and the mounting block 171 is installed on the bottom end of the push rod 15; in the fixed When the fixed piece 3 moves downward to fix the pressure plate 4, the fixed piece 3 will contact the movable block 13 and squeeze it into the inner cavity of the slot 12, so that the push rod 15 pushes the pressure block 17 downward, so that the elastic block 172 is fully in contact with the top of the workpiece (at this time, the elastic block 172 is squeezed, causing the elastic block 172 to deform, ensuring that the elastic block 172 is in full contact with the workpiece), increasing the contact pressure between the two, thereby increasing the contact friction between the two, reducing the probability of the workpiece moving after the pressure plate 4 presses the workpiece, and ensuring the stability of the fixture in fixing the workpiece.

[0038] In this embodiment, as a further optimized solution, please refer to Figure 6 and Figure 7A groove 19 is provided on the side wall of the mounting block 171, and a push block 18 is provided on the inner wall of the mounting groove 16. The push block 18 is in the inner cavity of the groove 19, and the push block 18 is triangular, and one corner of the triangle faces upward; when the mounting block 171 moves downward, the push block 18 will move out of the inner cavity of the groove 19, so that the inclined surface of the push block 18 contacts the side wall of the mounting block 171, which is used to push the mounting block 171 to move horizontally, so that the elastic block 172 applies a horizontal force to the workpiece, so that it moves closer to the guide member 2, to ensure that the workpiece will not separate from the fixture body 1, and to ensure its stable fixation.

[0039] It should be noted that the mounting block 171 is slidably connected to the push rod 15 , and a return spring is installed between the two.

[0040] In this embodiment, as a further optimized solution, please refer to Figure 7 An air storage tank 173 is provided in the elastic block 172, and the interior of the air storage tank 173 is filled with air; the air storage tank 173 increases the deformation amplitude of the elastic block 172, so that the elastic block 172 can fully contact the uneven area of ​​the workpiece.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tooling fixture with switchable processing surfaces for connecting rod processing, comprising: A fixture body (1) and a connecting piece (20) provided on the fixture body (1), characterized in that the connecting piece (20) is used to detachably connect the fixture body (1) to a processing machine tool, so that the fixture body (1) can be replaced to fix a processing piece of a switching processing surface; The fixture body (1) is provided with a guide member (2), the guide member (2) is provided with a pressing plate (4) and a fixing member (3) for fixing the pressing plate (4), and the pressing plate (4) is used to press the workpiece onto the fixture body (1); The clamp body (1) is provided with a stop pin (6) and a positioning pin (7) to limit the position of the workpiece on the clamp body (1).

2. A tooling fixture with switchable processing surfaces for connecting rod processing according to claim 1, characterized in that: The guide member (2), the fixing member (3), the pressure plate (4), the stop pin (6) and the positioning pin (7) form a positioning assembly. There are two positioning assemblies, and each of the guide members (2), the fixing member (3) and the pressure plate (4) of the positioning assembly has a plurality of guide members (2), a fixing member (3) and a pressure plate (4) and they correspond to each other.

3. A tooling fixture with switchable processing surfaces for connecting rod processing according to claim 2, characterized in that: The clamp body (1) is detachably provided with a support member (5) for supporting the pressure plate (4).

4. The tooling fixture with switchable processing surfaces for connecting rod processing according to claim 1, characterized in that: The clamp body (1) is provided with a cushion block (8) for supporting the workpiece, and the cushion block (8) is detachably mounted on the clamp body (1) via screws (9).

5. The tooling fixture with switchable processing surfaces for connecting rod processing according to claim 1, characterized in that: The clamp body (1) is provided with a lifting eye screw (10).

6. The tooling fixture with switchable processing surfaces for connecting rod processing according to claim 1, characterized in that: The pressing plate (4) is provided with an opening (11) extending along the length direction of the pressing plate (4), and the guide member (2) passes through the opening (11).

7. The tooling fixture with switchable processing surfaces for connecting rod processing according to claim 2, characterized in that: The top of the pressing plate (4) is provided with a slot (12), a moving block (13) and a spring member (14) connected to the moving block (13) are slidably provided in the slot (12), a mounting slot (16) is provided at the bottom of the pressing plate (4), a pressing block (17) is provided in the mounting slot (16), and a push rod (15) is provided between the pressing block (17) and the moving block (13); Wherein, the pressing block (17) comprises a mounting block (171) and an elastic block (172) arranged on the mounting block (171).

8. The tooling fixture with switchable machining surfaces for connecting rod machining according to claim 7, characterized in that: A groove (19) is provided on the side wall of the mounting block (171), and a push block (18) located in the groove (19) is provided on the inner side wall of the mounting groove (16). The push block (18) is used to push the mounting block (171) to move horizontally when the mounting block (171) moves downward.

9. The tooling fixture with switchable processing surfaces for connecting rod processing according to claim 8, characterized in that: An air storage tank (173) is provided in the elastic block (172).

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