High-precision workpiece positioning fixture for grinding machine

Abstract

This utility model discloses a high-precision workpiece positioning fixture for a grinding machine, relating to the field of grinding machine positioning fixture technology. It includes a worktable with a clamping mechanism inside. The clamping mechanism comprises a threaded rod, a clamping component, a contact pad, a worm gear, and a worm wheel. In the technical solution provided by this utility model, the clamping mechanism allows the worm gear to rotate when it rotates, which in turn drives the threaded rod. The rotation of the threaded rod controls the movement of the clamping component, thereby clamping and fixing the workpiece placed on top of the worktable. After fixing, an electric push rod drives the support frame to move. A second anti-slip pad on one side of the support frame contacts a first anti-slip pad on the side of the nut, supporting the nut and fixing it in the moving cavity. This prevents the worm gear from rotating on its own and ensures that even if the workpiece vibrates during grinding, the clamping component will not loosen, resulting in better clamping and positioning accuracy and reduced loosening.

Description

Technical Field

[0001] This utility model relates to the field of grinding machine positioning fixture technology, and in particular to a high-precision workpiece positioning fixture for grinding machines. Background Technology

[0002] A grinding machine is a machine tool that uses abrasive wheels to grind the surface of a workpiece. Most grinding machines use high-speed rotating grinding wheels for grinding, while a few use other abrasive wheels and free abrasives such as oilstones, belt abrasives, honing machines, ultra-precision machining tools, belt grinders, lapping machines, and polishing machines.

[0003] Currently available workpiece positioning fixtures for grinding machines are prone to loosening due to vibrations generated during workpiece grinding after the workpiece is fixed in place. This results in poor clamping and positioning accuracy, affecting the grinding effect. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a high-precision workpiece positioning fixture for grinding machines, so as to solve the problem that the fixtures of the prior art are easily loosened by the vibration generated by the workpiece grinding, resulting in poor clamping and positioning accuracy and affecting the grinding effect.

[0005] In view of this, the present invention provides a high-precision workpiece positioning fixture for a grinding machine, including a worktable, wherein a clamping mechanism is provided inside the worktable;

[0006] The clamping mechanism includes a threaded rod, a clamping component, a contact pad, a worm gear, and a worm wheel. A movable groove is formed at the top of the worktable. The threaded rod is rotatably connected inside the worktable. The clamping component is slidably connected inside the movable groove. The contact pad is installed inside the clamping component. An installation cavity is formed inside the worktable. The worm wheel is rotatably connected inside the installation cavity. The worm gear is rotatably connected inside the worktable, and the worm gear meshes with the worm wheel. A self-locking device is installed between one end of the worm gear and the worktable.

[0007] Optionally, both ends of the threaded rod are located inside the movable groove, and the clamping member is movably connected to the side wall of the threaded rod.

[0008] Optionally, the center of the threaded rod is located within the mounting cavity, and the worm gear is fixedly mounted on the side wall of the threaded rod.

[0009] Optionally, the workbench has a movable cavity inside, and a first spring is fixedly installed on the inner wall of the movable cavity. A snap-fit ​​component is fixedly installed on one end of the first spring.

[0010] Optionally, a locking groove is provided at one end of the worm gear sidewall, and a plurality of locking grooves are provided, which fit into the locking component.

[0011] Optionally, a shock-absorbing component is provided between the clamping member and the contact pad.

[0012] Optionally, the shock absorption assembly includes a fixing member, a movable rod, and a second spring. The fixing member is fixedly installed on the inner wall of the clamping member, and damping oil is injected inside the fixing member. One end of the movable rod is slidably connected inside the fixing member, and a through hole is opened at one end of the movable rod. The other end of the movable rod is fixedly installed on one side of the contact pad, and the second spring is fixedly installed between the contact pad and the inner wall of the clamping member.

[0013] Optionally, the self-locking device includes an electric push rod, a support frame, and a nut. A movable cavity is provided on one side of the worktable, and the nut is slidably connected inside the movable cavity. One end of the worm gear has a threaded groove that matches the nut, and the nut is movably connected to the side wall of the worm gear through the threaded groove. The electric push rod is fixedly installed on the inner wall of the movable cavity, and the support frame is fixedly installed on the output end of the electric push rod. A second anti-slip pad is fixedly installed on one side of the support frame, and a first anti-slip pad corresponding to the second anti-slip pad is fixedly installed on one side of the nut.

[0014] As can be seen from the above technical solutions, the embodiments of this utility model have the following advantages:

[0015] This utility model discloses a high-precision workpiece positioning fixture for a grinding machine. When the worm gear rotates, it drives the worm wheel to rotate, which in turn drives the threaded rod to rotate. The rotation of the threaded rod controls the movement of the clamping component, thereby clamping and fixing the workpiece placed on the top of the worktable. After fixing, an electric push rod drives the support frame to move. The second anti-slip pad on one side of the support frame contacts the first anti-slip pad on the side of the nut, thus supporting the nut and fixing it in the moving cavity. This prevents the worm gear from rotating on its own and ensures that even if the workpiece vibrates during grinding, the clamping component will not loosen, resulting in better clamping and positioning accuracy and less susceptibility to loosening.

[0016] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a schematic cross-sectional view of one end of the worm gear of this utility model;

[0021] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 5 This is a partial cross-sectional view of the workbench of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1. Worktable; 2. Movable groove; 3. Threaded rod; 4. Clamping component; 5. Contact pad; 6. Worm gear; 8. Mounting cavity; 9. Worm wheel; 10. Movable cavity; 11. First spring; 12. Snap-fit ​​component; 13. Snap-fit ​​groove; 14. Fixing component; 15. Movable rod; 16. Through hole; 17. Second spring; 18. Moving cavity; 19. Nut; 20. First anti-slip pad; 21. Electric push rod; 22. Support frame; 23. Second anti-slip pad; 24. Threaded groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0025] The following describes in detail, with reference to the accompanying drawings, a high-precision workpiece positioning fixture for a grinding machine according to an embodiment of the present invention.

[0026] Example 1

[0027] For easier understanding, please refer to Figures 1 to 5 An embodiment of a high-precision workpiece positioning fixture for a grinding machine provided by this utility model includes a worktable 1, and a clamping mechanism is provided inside the worktable 1.

[0028] The clamping mechanism includes a threaded rod 3, a clamping member 4, a contact pad 5, a worm gear 6, and a worm wheel 9. A movable groove 2 is formed at the top of the worktable 1. The threaded rod 3 is rotatably connected inside the worktable 1. The clamping member 4 is slidably connected inside the movable groove 2. The contact pad 5 is installed inside the clamping member 4. An installation cavity 8 is formed inside the worktable 1. The worm wheel 9 is rotatably connected inside the installation cavity 8. The worm gear 6 is rotatably connected inside the worktable 1 and meshes with the worm wheel 9. Both ends of the threaded rod 3 are located inside the movable groove 2. The clamping member 4 is movably connected to the side wall of the threaded rod 3. The center of the threaded rod 3 is located inside the installation cavity 8. The worm wheel 9 is fixedly installed. On the side wall of the threaded rod 3, the self-locking device includes an electric push rod 21, a support frame 22, and a nut 19. A movable cavity 18 is opened on one side of the worktable 1. The nut 19 is slidably connected inside the movable cavity 18. One end of the worm gear 6 is provided with a threaded groove 24 that matches the nut 19. The nut 19 is movably connected to the side wall of the worm gear 6 through the threaded groove 24. The electric push rod 21 is fixedly installed on the inner wall of the movable cavity 18. The support frame 22 is fixedly installed on the output end of the electric push rod 21. A second anti-slip pad 23 is fixedly installed on one side of the support frame 22. A first anti-slip pad 20 corresponding to the second anti-slip pad 23 is fixedly installed on one side of the nut 19.

[0029] It should be noted that by using the worm gear 9 and worm 6 to control the rotation of the threaded rod 3, the threaded rod 3 cannot drive the worm 6 to rotate through the worm gear 9, making the clamping parts 4 less prone to loosening. Both the moving cavity 18 and the nut 19 are hexagonal, allowing the worm 6 to move the nut 19 within the moving cavity 18 through the threaded groove 24 when it rotates. The worktable 1 is mounted on the grinding machine. The threads on the side walls at both ends of the threaded rod 3 are opposite, allowing the clamping parts 4 at both ends to move in opposite directions simultaneously when the threaded rod 3 rotates. By setting the worm 6, when the worm 6 rotates, it can drive the worm gear 9 to rotate, which in turn drives the threaded rod 3 to rotate. The rotation of the threaded rod 3 controls the movement of the clamping parts 4, thus ensuring the smooth operation of the worktable. The workpiece placed on top of the platform 1 is clamped and fixed. After fixing, the support frame 22 is moved by the electric push rod 21. The second anti-slip pad 23 on one side of the support frame 22 contacts the first anti-slip pad 20 on the side of the nut 19 to support the nut 19, thereby fixing the nut 19 in the moving cavity 18. This makes it difficult for the worm gear 6 to rotate on its own, and even if the workpiece vibrates during the grinding process, the clamping part 4 will not loosen. This makes the clamping and positioning accuracy of the fixture better and less prone to loosening. By setting the first anti-slip pad 20 and the second anti-slip pad 23, a large friction force can be generated when the first anti-slip pad 20 contacts the second anti-slip pad 23, thereby ensuring the support effect between the support frame 22 and the nut 19.

[0030] In some embodiments, such as Figure 3As shown, the workbench 1 has a movable cavity 10 inside, and a first spring 11 is fixedly installed on the inner wall of the movable cavity 10. A snap-fit ​​part 12 is fixedly installed on one end of the first spring 11. A snap-fit ​​groove 13 is opened on one end of the side wall of the worm gear 6. Several snap-fit ​​grooves 13 are provided, and several snap-fit ​​grooves 13 fit with snap-fit ​​parts 12.

[0031] It should be noted that the first spring 11 can be used to support the snap-fit ​​part 12, so that the snap-fit ​​part 12 can be snapped into the snap-fit ​​groove 13. The end faces of the snap-fit ​​part 12 and the snap-fit ​​groove 13 are both triangular, so that the worm 6 can be limited without affecting the rotation of the worm 6, thereby further ensuring the stability of the worm 6.

[0032] Example 2

[0033] In some embodiments, such as Figure 4 As shown, a shock-absorbing assembly is provided between the clamping member 4 and the contact pad 5. The shock-absorbing assembly includes a fixing member 14, a movable rod 15, and a second spring 17. The fixing member 14 is fixedly installed on the inner wall of the clamping member 4, and damping oil is injected inside the fixing member 14. One end of the movable rod 15 is slidably connected inside the fixing member 14, and a through hole 16 is opened at one end of the movable rod 15. The other end of the movable rod 15 is fixedly installed on one side of the contact pad 5. The second spring 17 is fixedly installed between the contact pad 5 and the inner wall of the clamping member 4.

[0034] It should be noted that the second spring 17 can be used to support the contact pad 5. The damping oil inside the fixing member 14 can flow through the through hole 16. By connecting the movable rod 15 to the contact pad 5, the second spring 17 and the movable rod 15 cooperate when the contact pad 5 vibrates, and the damping oil absorbs the energy to prevent the contact pad 5 from rebounding during the processing and ensure the clamping accuracy.

[0035] Working principle: When in use, the workpiece is placed on the worktable 1. The worm gear 6 is rotated manually. When the worm gear 6 rotates, it drives the worm wheel 9 to rotate. The rotation of the worm wheel 9 drives the threaded rod 3 to rotate. The rotation of the threaded rod 3 controls the movement of the clamping part 4, thereby clamping and fixing the workpiece placed on the top of the worktable 1. The snap-fit ​​part 12 can limit the worm gear 6 without affecting its rotation, further ensuring the stability of the worm gear 6. The second spring 17 is used to support the contact pad 5. The through hole 16 allows the damping oil inside the fixing part 14 to flow through the through hole 16. By connecting the movable rod 15 to the contact pad 5, when the contact pad 5 vibrates, the second spring 17 and the movable rod 15 cooperate to absorb energy through the damping oil, preventing the contact pad 5 from rebounding during processing and ensuring the clamping accuracy.

[0036] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A high precision workpiece positioning fixture for a grinding machine, characterized by: Includes a workbench (1), and the workbench (1) is provided with a clamping mechanism inside; The clamping mechanism includes a threaded rod (3), a clamping member (4), a contact pad (5), a worm (6), and a worm wheel (9). The top of the worktable (1) has a movable groove (2). The threaded rod (3) is rotatably connected inside the worktable (1). The clamping member (4) is slidably connected inside the movable groove (2). The contact pad (5) is installed inside the clamping member (4). The worktable (1) has an installation cavity (8). The worm wheel (9) is rotatably connected inside the installation cavity (8). The worm (6) is rotatably connected inside the worktable (1). The worm (6) meshes with the worm wheel (9). A self-locking device is installed between one end of the worm (6) and the worktable (1).

2. The high precision workpiece positioning fixture of claim 1, wherein: The two ends of the threaded rod (3) are located inside the movable groove (2), and the clamping member (4) is movably connected to the side wall of the threaded rod (3).

3. The high precision workpiece positioning fixture of claim 1, wherein: The center of the threaded rod (3) is located inside the mounting cavity (8), and the worm gear (9) is fixedly installed on the side wall of the threaded rod (3).

4. The high precision workpiece positioning fixture of claim 1, wherein: The workbench (1) has an open movable cavity (10) inside. A first spring (11) is fixedly installed on the inner wall of the movable cavity (10). A snap-fit ​​component (12) is fixedly installed on one end of the first spring (11).

5. A high precision workpiece positioning fixture for a grinding machine according to claim 4, wherein: The worm (6) has a snap-fit ​​groove (13) at one end of its side wall. There are several snap-fit ​​grooves (13), and the several snap-fit ​​grooves (13) fit into the snap-fit ​​component (12).

6. The high precision workpiece positioning fixture of claim 1, wherein: A shock-absorbing component is provided between the clamping member (4) and the contact pad (5).

7. A high precision workpiece positioning fixture for a grinding machine as claimed in claim 6, wherein: The shock absorption assembly includes a fixing member (14), a movable rod (15), and a second spring (17). The fixing member (14) is fixedly installed on the inner wall of the clamping member (4). The fixing member (14) is filled with damping oil. One end of the movable rod (15) is slidably connected inside the fixing member (14). One end of the movable rod (15) has a through hole (16). The other end of the movable rod (15) is fixedly installed on one side of the contact pad (5). The second spring (17) is fixedly installed between the contact pad (5) and the inner wall of the clamping member (4).

8. The high precision workpiece positioning fixture of claim 6, wherein: The self-locking device includes an electric push rod (21), a support frame (22), and a nut (19). A movable cavity (18) is provided on one side of the workbench (1). The nut (19) is slidably connected inside the movable cavity (18). A threaded groove (24) that matches the nut (19) is provided at one end of the worm gear (6). The nut (19) is movably connected to the side wall of the worm gear (6) through the threaded groove (24). The electric push rod (21) is fixedly installed on the inner wall of the movable cavity (18). The support frame (22) is fixedly installed at the output end of the electric push rod (21). A second anti-slip pad (23) is fixedly installed on one side of the support frame (22). A first anti-slip pad (20) corresponding to the second anti-slip pad (23) is fixedly installed on one side of the nut (19).

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