Secondary positioning and clamping mechanism capable of adjusting center of clamping jaw

Abstract

The utility model relates to a secondary positioning and clamping mechanism capable of adjusting the center of a clamping jaw, which belongs to the technical field of internal splines and comprises a working table, a front linear rail fixing plate is fixedly connected to the front face of the working table, and a front air cylinder support is fixedly connected to the bottom face of the front linear rail fixing plate. A front pushing air cylinder is fixedly installed on the left side face of the front air cylinder support, a linear guide rail C is fixedly connected to the top face of the front linear guide rail fixing plate, the linear guide rail C is slidably connected with a front sliding block fixing plate, and a two-pull front mandrel component and a two-pull rear mandrel component are sequentially and fixedly installed on the top face of the front sliding block fixing plate from left to right. According to the secondary positioning and clamping mechanism capable of adjusting the center of the clamping jaw, the whole carrying and broaching automation can be achieved, each moving mechanism is guided through a linear guide rail, the movement precision and the production efficiency are improved, the broaching center of a workpiece can be accurately adjusted through the adjustable clamping jaw component, hole site alignment is convenient, and the machining quality of the workpiece is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of internal spline technology, specifically to a secondary positioning and clamping mechanism with an adjustable gripper center. Background Technology

[0002] An internal spline is a mechanical part mainly used to transmit torque and motion. It consists of multiple teeth located on the surface of an inner cylinder. Internal splines are usually used in conjunction with external splines to form a spline connection. This type of connection is characterized by its ability to withstand large loads, good centering and guiding properties, and suitability for applications requiring high-precision centering and transmission of large torques.

[0003] With the development of my country's automobile industry, higher requirements have been placed on the surface hardness of internal splines of parts such as transmission gears. The commonly used internal spline broaching process does not produce workpieces with high hardness. To improve the workpiece hardness, a heat treatment is required after the internal spline broaching is completed. However, the heat treatment process often causes workpiece deformation, which cannot meet the increasingly high requirements of spline transmission performance.

[0004] To improve product quality, a high-speed hard broaching process is now used, employing carbide broaches to perform secondary finishing on heat-treated internal spline parts to remove internal spline deformation caused by heat treatment. This requires the creation of a positioning mechanism on the tooling to position the heat-treated workpiece in the tooth profile before broaching. Therefore, a secondary positioning and clamping mechanism with an adjustable jaw center is proposed to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a secondary positioning clamping mechanism with an adjustable gripper center, which has the advantage of convenient positioning and solves the problem of toothed positioning of heat-treated workpieces.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a secondary positioning clamping mechanism with an adjustable gripper center, including a worktable, a front rail fixing plate fixedly connected to the front of the worktable, and a front cylinder bracket fixedly connected to the bottom surface of the front rail fixing plate.

[0007] A front pusher cylinder is fixedly installed on the left side of the front cylinder bracket. A linear guide C is fixedly connected to the top surface of the front linear guide fixing plate. A front slider fixing plate is slidably connected to the linear guide C. A two-pull front mandrel assembly and a two-pull rear mandrel assembly are fixedly installed sequentially from left to right on the top surface of the front slider fixing plate. A workpiece is fitted on the two-pull front mandrel assembly. A front cylinder connecting plate is fixedly connected to the output end of the front pusher cylinder. A front cylinder pusher plate is fixedly connected to the top surface of the front cylinder connecting plate. The front cylinder pusher plate and the front slider fixing plate are fixedly connected. A sensor bracket is fixedly connected to the top surface of the front linear guide fixing plate. A sensor is fixedly installed on the left side of the sensor bracket. A gripper assembly is placed on the top of the worktable.

[0008] The gripper component includes a gripper, a slider, and a slider mounting base. The gripper is fixedly mounted on the slider, and the slider is fixedly mounted on the slider mounting base.

[0009] The workbench is equipped with a pneumatic gripper assembly for driving the gripper components.

[0010] The workbench is equipped with a side cylinder moving assembly, which drives the pneumatic gripper clamping assembly to move.

[0011] Furthermore, there are two gripper components. Each of the two sliders has a first mounting groove on one of its opposite sides. The two grippers extend into the interior of the two first mounting grooves and slide in connection with them. Each of the two sliders has a waist-shaped hole.

[0012] Furthermore, each of the two slider fixing seats has a second mounting groove on one of its opposite sides, and the two sliders extend to the two second mounting grooves respectively. Each of the two sliders has an oblong hole.

[0013] Furthermore, the pneumatic gripper clamping assembly includes a lifting cylinder seat, which is placed on the left side of the worktable. A lifting cylinder is fixedly installed on the top surface of the lifting cylinder seat. A floating joint is fixedly connected to the output end of the lifting cylinder. A lifting cylinder connecting block is fixedly installed on the top of the floating joint. Two linear rails A are fixedly installed on the right side of the lifting cylinder seat. A gripper fixing plate is slidably connected between the two linear rails A. One end of the lifting cylinder connecting block passes through the lifting cylinder seat. The gripper fixing plate and the floating joint are fixedly connected. A gripper is fixedly connected to the right side of the gripper fixing plate. A linear rail B pad is fixedly installed on the top surface of the gripper fixing plate. A linear rail B is fixedly installed on the top surface of the linear rail B pad. A gripper connecting plate is slidably connected to the linear rail B. The gripper and the gripper connecting plate are fixedly connected. A clamping jaw connecting plate is fixedly connected to the right side of the gripper. The gripper component is fixedly installed on the clamping jaw connecting plate.

[0014] Furthermore, a linkage groove is provided on the right side of the lifting cylinder seat, and the lifting cylinder connecting block passes through the linkage groove and is slidably connected to it.

[0015] Furthermore, the workbench is internally fixed with a positioning sleeve, the top surface of which is fixedly connected to a reference gold pad, and the top surface of which is fixedly mounted with a reference gold.

[0016] Furthermore, the side cylinder moving assembly includes a side cylinder fixing plate, which is fixedly connected to the left side of the worktable. A side cylinder bracket is fixedly installed on the left side of the side cylinder fixing plate, and a side pusher cylinder is fixedly installed on the side cylinder bracket. Two linear guides D are fixedly connected to the top surface of the side cylinder fixing plate, and a side slider fixing plate is slidably connected between the two linear guides D. A side cylinder pusher plate is fixedly installed on the left side of the side slider fixing plate, and a side cylinder connecting plate is fixedly installed on the right side of the side cylinder pusher plate. The output end of the side pusher cylinder is fixedly connected to the side cylinder connecting plate, and the lifting cylinder seat is fixedly connected to the side slider fixing plate.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0018] 1. The adjustable gripper center secondary positioning clamping mechanism can realize the automation of the entire handling and broaching process. Each moving mechanism adopts linear guide rail guidance, which improves motion accuracy and production efficiency. Through the adjustable gripper components, the broaching center of the workpiece can be precisely adjusted, which facilitates hole alignment and ensures the processing quality of the workpiece.

[0019] 2. The secondary positioning and clamping mechanism of the adjustable gripper center, by adding a material picking position sensor, can effectively prevent interference from various moving parts on the fixture, and play a protective role in the entire movement process. By detecting the airtightness of the workpiece, it can effectively avoid workpiece crushing, improve the stability of product quality, and is convenient to maintain and repair. The structure is simple and compact, reducing installation space. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a top view of the structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the left side of the structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0024] Figure 5 This is a top view of the gripper component in the structure of this utility model.

[0025] In the diagram: 1. Front mandrel assembly for double pull; 2. Front slider fixing plate; 3. Rear mandrel assembly for double pull; 4. Sensor; 5. Sensor bracket; 6. Front linear guide fixing plate; 7. Front cylinder bracket; 8. Front pusher cylinder; 9. Front cylinder pusher plate; 10. Front cylinder connecting plate; 11. Linear guide A; 12. Linear guide B; 13. Pneumatic gripper connecting plate; 14. Pneumatic gripper; 15. Gripper connecting plate; 16. Gripper assembly; 16a. Gripper; 16b. Slider; 16c. Slider fixing seat; 1 7. Workbench, 18. Linear rail C, 19. Linear rail D, 20. Side cylinder fixing plate, 21. Lifting cylinder seat, 22. Side cylinder bracket, 23. Side pusher cylinder, 24. Side slider fixing plate, 25. Side cylinder pusher plate, 26. Side cylinder connecting plate, 27. Lifting cylinder, 28. Floating joint, 29. Lifting cylinder connecting block, 30. Pneumatic gripper fixing plate, 31. Linear rail B pad, 32. Workpiece, 33. Reference metal, 34. Reference metal pad, 35. Positioning sleeve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1 to 5 The secondary positioning clamping mechanism with adjustable gripper center in this embodiment includes a worktable 17, a front rail fixing plate 6 fixedly connected to the front of the worktable 17, and a front cylinder bracket 7 fixedly connected to the bottom of the front rail fixing plate 6.

[0028] A front pusher cylinder 8 is fixedly installed on the left side of the front cylinder bracket 7. A linear guide C18 is fixedly connected to the top surface of the front linear guide fixing plate 6. A front slider fixing plate 2 is slidably connected to the linear guide C18. A two-pull front mandrel component 1 and a two-pull rear mandrel component 3 are fixedly installed on the top surface of the front slider fixing plate 2 from left to right. A workpiece 32 is fitted on the two-pull front mandrel component 1. A front cylinder connecting plate 10 is fixedly connected to the output end of the front pusher cylinder 8. A front cylinder pusher plate 9 is fixedly connected to the top surface of the front cylinder connecting plate 10. The front cylinder pusher plate 9 and the front slider fixing plate 2 are fixedly connected. A sensor bracket 5 is fixedly connected to the top surface of the front linear guide fixing plate 6. A sensor 4 is fixedly installed on the left side of the sensor bracket 5. A gripper component 16 is placed on the top of the worktable 17.

[0029] The gripper component 16 includes a gripper 16a, a slider 16b, and a slider fixing seat 16c. The gripper 16a is fixedly mounted on the slider 16b, and the slider 16b is fixedly mounted on the slider fixing seat 16c.

[0030] The number of gripper components 16 is two. Each of the two sliders 16b has a first mounting groove on one side facing each other. The two grippers 16a extend into the two first mounting grooves and slide in connection with them. Each of the two sliders 16b has a waist-shaped hole. Each of the two slider fixing seats 16c has a second mounting groove on one side facing each other. Each of the two sliders 16b extends into the two second mounting grooves. Each of the two sliders 16b has a waist-shaped hole.

[0031] Specifically, a waist-shaped hole is made on the slider 16b. After the left and right installation positions of the gripper 16a are determined during the debugging, it is tightened with screws. A waist-shaped hole is made on the slider 16b. After the up and down positions of the slider 16b are determined during the debugging, it is tightened with screws. The spline hole in the workpiece 32 is fitted onto the second-pull front mandrel component 1 at the front center of the fixture. The positioning is achieved by the toothed shape on the second-pull front mandrel component 1. The front push cylinder 8 drives the workpiece 32 on the second-pull rear mandrel component 3 to move to the right pick-up position. The sensor 4 receives the workpiece 32 arrival signal, completing one broaching cycle.

[0032] In this embodiment, a pneumatic gripper assembly is provided on the workbench 17. The pneumatic gripper assembly includes a lifting cylinder seat 21, which is placed on the left side of the workbench 17. A lifting cylinder 27 is fixedly installed on the top surface of the lifting cylinder seat 21. A floating joint 28 is fixedly connected to the output end of the lifting cylinder 27. A lifting cylinder connecting block 29 is fixedly installed on the top of the floating joint 28. Two linear guides A11 are fixedly installed on the right side of the lifting cylinder seat 21. A gripper fixing plate 30 is slidably connected between the two linear guides A11. One end of the cylinder connecting block 29 passes through the lifting cylinder seat 21. The gripper fixing plate 30 and the floating joint 28 are fixedly connected. The gripper 14 is fixedly connected to the right side of the gripper fixing plate 30. The linear guide B pad 31 is fixedly installed on the top surface of the gripper fixing plate 30. The linear guide B12 is fixedly installed on the top surface of the linear guide B pad 31. The gripper connecting plate 13 is slidably connected to the linear guide B12. The gripper 14 and the gripper connecting plate 13 are fixedly connected. The gripper connecting plate 15 is fixedly connected to the right side of the gripper 14. The gripper component 16 is fixedly installed on the gripper connecting plate 15.

[0033] The lifting cylinder seat 21 has a linkage groove on its right side. The lifting cylinder connecting block 29 passes through the linkage groove and is slidably connected to it. The worktable 17 is internally fixedly fitted with a positioning sleeve 35. The top surface of the positioning sleeve 35 is fixedly connected with a reference gold pad 34. The top surface of the reference gold pad 34 is fixedly installed with a reference gold 33.

[0034] Specifically, the slider fixing seat 16c has a waist-shaped hole, which can move back and forth along the gripper connecting plate 15. After the front and back positions of the slider fixing seat 16c are determined during the debugging, it is locked with screws. The lifting cylinder 27 drives the floating joint 28, the lifting cylinder connecting block 29, the gripper fixing plate 30, the linear guide B pad 31, the linear guide B12, the gripper connecting plate 13, the gripper 14, the gripper connecting plate 15, the gripper component 16 and the workpiece 32 to move upward along the two linear guides A11.

[0035] In this embodiment, a side cylinder moving assembly is provided on the workbench 17. The side cylinder moving assembly includes a side cylinder fixing plate 20, which is fixedly connected to the left side of the workbench 17. A side cylinder bracket 22 is fixedly installed on the left side of the side cylinder fixing plate 20. A side pusher cylinder 23 is fixedly installed on the side cylinder bracket 22. Two linear guides D19 are fixedly connected to the top surface of the side cylinder fixing plate 20. A side slider fixing plate 24 is slidably connected between the two linear guides D19. A side cylinder pusher plate 25 is fixedly installed on the left side of the side slider fixing plate 24. A side cylinder connecting plate 26 is fixedly installed on the right side of the side cylinder pusher plate 25. The output end of the side pusher cylinder 23 is fixedly connected to the side cylinder connecting plate 26. The lifting cylinder seat 21 is fixedly connected to the side slider fixing plate 24.

[0036] Specifically, the side pusher cylinder 23 drives the lifting cylinder moving mechanism on the side cylinder connecting plate 26, the side cylinder pusher plate 25, the side slider fixing plate 24, and the lifting cylinder seat 21 to move along the linear guide D19 to the broaching position on the worktable 17.

[0037] The working principle of the above embodiments is as follows:

[0038] (1) Fit the spline hole of workpiece 32 onto the two-pull front spindle component 1 at the front center of the fixture, and position it by the tooth profile on the two-pull front spindle component 1.

[0039] (2) The pneumatic gripper 14 drives the gripper connecting plate 15 and the gripper component 16 to move inward along the linear guide B12, clamping the workpiece 32. The lifting cylinder 27 drives the floating joint 28, the lifting cylinder connecting block 29, the pneumatic gripper fixing plate 30, the linear guide B pad 31, the linear guide B12, the pneumatic gripper connecting plate 13, the pneumatic gripper 14, the gripper connecting plate 15, the gripper component 16, and the workpiece 32 to move upward along the two linear guides A11. The side pusher cylinder 23 drives the side cylinder connecting plate 26, the side cylinder pusher plate 25, the side slider fixing plate 24, and the lifting cylinder seat 21 to move upward. The lifting cylinder moving mechanism moves along the linear guide D19 to the broaching position on the worktable 17. When the workpiece 32 reaches the broaching position on the worktable 17, the lifting cylinder 27 drives the gripper component 16 and the workpiece 32 to move downward along the two linear guides A11, placing the workpiece 32 on the reference metal 33. At the same time, the front pusher cylinder 8 drives the front cylinder connecting plate 10, the front cylinder pusher plate 9, the second pull front mandrel component 1 and the second pull rear mandrel component 3 on the front slider fixing plate 2 to move to the left along the linear guide C18, so that the second pull rear mandrel component 3 reaches the intermediate position to wait.

[0040] (3) The broach is inserted into the workpiece 32. The broach front guide part is precisely positioned on the spline tooth profile inside the workpiece 32. If the broach is obstructed during insertion, the broaching machine anti-collision mechanism will stop and alarm. Then the pneumatic gripper 14 releases the gripper component 16 to both sides. The pneumatic testing device vents the reference metal 33 to check the air tightness. If the air test is qualified, the broach starts to broach the heat-treated internal spline.

[0041] (4) After broaching is completed, the pneumatic gripper 14 drives the gripper component 16 to clamp the workpiece 32 and moves upward with the lifting cylinder 27. The side pusher cylinder 23 drives the clamped workpiece 32 to move outward to the top of the intermediate position. Then the lifting cylinder 27 drives the clamped workpiece 32 to move downward and place the workpiece 32 on the second broaching mandrel component 3. Then the pneumatic gripper 14 opens and releases the workpiece 32.

[0042] (5) The front push cylinder 8 drives the workpiece 32 on the second pull mandrel component 3 to move to the right pick-up position. The sensor 4 receives the workpiece 32 arrival signal and completes one broaching cycle.

[0043] The control method of this utility model is through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A secondary positioning clamping mechanism with adjustable gripper center, comprising a worktable (17), characterized in that: The front of the workbench (17) is fixedly connected to a front rail fixing plate (6), and the bottom surface of the front rail fixing plate (6) is fixedly connected to a front cylinder bracket (7). A front pusher cylinder (8) is fixedly installed on the left side of the front cylinder bracket (7). A linear guide C (18) is fixedly connected to the top surface of the front linear guide fixing plate (6). A front slider fixing plate (2) is slidably connected to the linear guide C (18). A two-pull front mandrel component (1) and a two-pull rear mandrel component (3) are fixedly installed on the top surface of the front slider fixing plate (2) from left to right. A workpiece (32) is fitted on the two-pull front mandrel component (1). The front pusher cylinder (8) The output end is fixedly connected to the front cylinder connecting plate (10), the top surface of the front cylinder connecting plate (10) is fixedly connected to the front cylinder pusher plate (9), the front cylinder pusher plate (9) and the front slider fixing plate (2) are fixedly connected, the top surface of the front linear rail fixing plate (6) is fixedly connected to the sensor bracket (5), the left side of the sensor bracket (5) is fixedly installed with the sensor (4), and the top of the worktable (17) is placed with the gripper component (16). The gripper component (16) includes a gripper (16a), a slider (16b), and a slider fixing seat (16c). The gripper (16a) is fixedly mounted on the slider (16b), and the slider (16b) is fixedly mounted on the slider fixing seat (16c). The worktable (17) is provided with a pneumatic gripper assembly for driving the gripper component (16); The worktable (17) is equipped with a side cylinder moving assembly, which is used to drive the pneumatic gripper clamping assembly to move.

2. The secondary positioning and clamping mechanism with adjustable gripper center according to claim 1, characterized in that: The number of gripper components (16) is two. Each of the two sliders (16b) has a first mounting groove on one side facing each other. The two grippers (16a) extend into the interior of the two first mounting grooves and slide in connection with them. Each of the two sliders (16b) has a waist-shaped hole.

3. The secondary positioning and clamping mechanism with adjustable gripper center according to claim 2, characterized in that: Each of the two slider fixing seats (16c) has a second mounting groove on one of its opposite sides, and the two sliders (16b) extend to the two second mounting grooves respectively. Each of the two sliders (16b) has a waist-shaped hole.

4. The secondary positioning and clamping mechanism with adjustable gripper center according to claim 1, characterized in that: The pneumatic gripper assembly includes a lifting cylinder seat (21), which is placed on the left side of the workbench (17). A lifting cylinder (27) is fixedly installed on the top surface of the lifting cylinder seat (21). A floating joint (28) is fixedly connected to the output end of the lifting cylinder (27). A lifting cylinder connecting block (29) is fixedly installed on the top of the floating joint (28). Two linear rails A (11) are fixedly installed on the right side of the lifting cylinder seat (21). A gripper fixing plate (30) is slidably connected between the two linear rails A (11). One end of the lifting cylinder connecting block (29) passes through the lifting cylinder. The cylinder base (21) is fixedly connected to the pneumatic gripper fixing plate (30) and the floating joint (28). The right side of the pneumatic gripper fixing plate (30) is fixedly connected to the pneumatic gripper (14). The top surface of the pneumatic gripper fixing plate (30) is fixedly installed with the linear guide B pad (31). The top surface of the linear guide B pad (31) is fixedly installed with the linear guide B (12). The linear guide B (12) is slidably connected to the pneumatic gripper connecting plate (13). The pneumatic gripper (14) and the pneumatic gripper connecting plate (13) are fixedly connected. The right side of the pneumatic gripper (14) is fixedly connected to the gripper connecting plate (15). The gripper component (16) is fixedly installed on the gripper connecting plate (15).

5. The secondary positioning and clamping mechanism with adjustable gripper center according to claim 4, characterized in that: The right side of the lifting cylinder seat (21) is provided with a linkage groove, and the lifting cylinder connecting block (29) passes through the linkage groove and is slidably connected to it.

6. The secondary positioning and clamping mechanism with adjustable gripper center according to claim 5, characterized in that: The workbench (17) is internally fixedly fitted with a positioning sleeve (35), and a reference gold pad (34) is fixedly connected to the top surface of the positioning sleeve (35). A reference gold (33) is fixedly installed on the top surface of the reference gold pad (34).

7. The secondary positioning and clamping mechanism with adjustable gripper center according to claim 4, characterized in that: The side cylinder moving assembly includes a side cylinder fixing plate (20), which is fixedly connected to the left side of the workbench (17). A side cylinder bracket (22) is fixedly installed on the left side of the side cylinder fixing plate (20). A side pusher cylinder (23) is fixedly installed on the side cylinder bracket (22). Two linear guides D (19) are fixedly connected to the top surface of the side cylinder fixing plate (20). A side slider fixing plate (24) is slidably connected between the two linear guides D (19). A side cylinder pusher plate (25) is fixedly installed on the left side of the side slider fixing plate (24). A side cylinder connecting plate (26) is fixedly installed on the right side of the side cylinder pusher plate (25). The output end of the side pusher cylinder (23) is fixedly connected to the side cylinder connecting plate (26). The lifting cylinder seat (21) is fixedly connected to the side slider fixing plate (24).

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