A precision mold shaft part polishing device

Abstract

This invention relates to the field of parts processing equipment technology, and discloses a precision mold shaft parts grinding device, including a processing table. In this invention, the clamping drive structure is optimized to achieve synchronous extension and retraction of multiple sets of jaws and synchronous centering and locking, avoiding the tedious process of operators sequentially rotating adjusting screws and adjusting jaws one by one, significantly improving the clamping efficiency of mold shaft parts. The two-way limiting clamping structure at both ends is optimized to balance the workpiece clamping force and compensate for the structural shortcoming of the tail-end ejector pin, which only has axial support and lacks radial limiting. During grinding, the radial wobble and circumferential deflection of the shaft parts can be simultaneously constrained, offsetting the radial load and grinding stress generated by the grinding wheel, and suppressing slight runout at the workpiece end. Simultaneously with the grinding operation, cutting fluid is automatically and precisely sprayed towards the grinding contact points of the shaft parts, reducing the surface temperature of the workpiece and the working temperature of the grinding wheel, and using the flushing action of the cutting fluid to promptly remove metal chips generated during grinding.

Description

Technical Field

[0001] This invention relates to the field of parts processing equipment technology, specifically to a precision mold shaft parts grinding device. Background Technology

[0002] Mold shaft parts are core transmission and guiding assembly components inside precision injection molds, stamping molds, and die-casting molds. They include mold core ejector pins, guide shafts, eccentric drive shafts, insert shafts, and other parts. The dimensional accuracy, outer cylindrical surface finish, and rotational coaxiality of these parts directly determine the mold opening and closing accuracy, forming stability, and mold service life. Therefore, after precision machining, shaft parts must undergo high-precision outer cylindrical grinding to eliminate turning marks and correct dimensional and positional errors. This is an indispensable process in the mold parts processing flow.

[0003] Currently, most mainstream precision shaft grinding devices on the market adopt a combination clamping structure of chuck and tailstock pin. This structure is simple and has low manufacturing cost, and is widely used in the grinding and processing of shafts in small and medium-sized molds. However, in the long-term mass production application, a number of unavoidable structural defects have been gradually exposed.

[0004] Firstly, the existing chuck clamping assembly adopts a split-type independently adjustable jaw structure. During clamping operations, the operator needs to rotate the adjusting screw corresponding to each jaw in sequence to correct the extension stroke and clamping force of each jaw one by one. It is impossible to achieve synchronous centering and locking, which is cumbersome and has a high operating threshold. It significantly increases the workpiece changeover time. Moreover, the clamping method of adjusting the jaws in steps is very prone to uneven clamping force. When the radial clamping force deviation of the three jaws is too large, it will cause the shaft workpiece to be eccentrically clamped, resulting in continuous rotational deviation throughout the grinding process, which directly leads to the scrapping of the parts.

[0005] Secondly, existing grinding devices generally adopt a combination clamping structure of chuck and tailstock ejector. During the grinding process, the high-speed rotating shaft parts are continuously subjected to the radial grinding load of the grinding wheel. The ejector only provides axial support force and cannot restrain the radial wobble and circumferential deflection of the workpiece. At the same time, the mold shafts are mostly slender shaft components with weak rigidity. The grinding stress can easily cause slight runout at the end of the workpiece and axial offset, resulting in the workpiece rotation coaxiality exceeding the standard. After grinding, there are machining defects such as external taper error, excessive radial runout, and surface ripples and vibrations. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a precision mold shaft grinding device, which solves the problems of poor workpiece clamping and centering stability and cumbersome clamping and adjustment in existing shaft grinding devices.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a precision mold shaft part grinding device, comprising a processing table, wherein a clamping assembly is provided on the processing table, the clamping assembly being used to improve the processing stability of shaft parts; The clamping assembly includes a clamping disk and a sleeve, with the center line of the sleeve collinear with the center line of the clamping disk. The clamping disk has multiple telescopic grooves evenly distributed near the end of the sleeve, and a slide block is slidably connected in the telescopic groove. The clamping disk has a cavity, and a rotating disk is rotatably connected in the cavity. The rotating disk has multiple arc-shaped grooves evenly distributed along its circumference. A lever is fixedly connected to the end of the slide block near the rotating disk, and the lever is slidably connected to the arc-shaped groove. Multiple supports are evenly and fixedly connected to one end of the sleeve near the clamping plate. A movable plate is slidably connected inside the sleeve. A pin is fixedly connected to the center of the movable plate. Multiple pull rods are evenly and fixedly connected to the movable plate along the circumference. A pulling frame is rotatably connected to one end of the support away from the sleeve. A hinge plate is rotatably connected to one end of the pull rod away from the movable plate. The hinge plate is rotatably connected to the pulling frame at one end away from the pull rod.

[0008] Preferably, a fixed housing is fixedly connected to the end of the slide away from the lever, a limit block is slidably connected inside the fixed housing, and a fixed frame is fixedly connected to the outer wall of the fixed housing.

[0009] Preferably, a plug rod is slidably connected inside the fixing frame, a return spring is sleeved on the outer wall of the plug rod, and the plug rod passes through the fixing shell and is inserted into the limiting block.

[0010] Preferably, an arc-shaped block is fixedly connected to the end of the limiting block away from the fixed shell, and two rotating grooves are symmetrically opened at the end of the arc-shaped block away from the limiting block, and an abutment block is rotatably connected in the rotating groove.

[0011] Preferably, a drive motor is fixedly connected inside the cavity, a worm gear is fixedly connected to the output end of the drive motor, a drive shaft is fixedly connected to the center of the rotating disk, a worm wheel is fixedly connected to the outer wall of the drive shaft, and the teeth of the worm gear mesh with the teeth of the worm wheel.

[0012] Preferably, a connecting frame is fixedly connected to the end of the pulling frame, a limit wheel is rotatably connected inside the connecting frame, and a drive box, a first slide rail, and a second slide rail are fixedly connected to the upper surface of the processing table.

[0013] Preferably, a first threaded seat is slidably connected inside the first slide rail, a support plate is fixedly connected to the upper surface of the first threaded seat, the sleeve is rotatably connected to the support plate, a first threaded rod is rotatably connected inside the first slide rail, and the first threaded seat and the first threaded rod are threadedly connected.

[0014] Preferably, a second threaded seat is slidably connected inside the second slide rail, a third slide rail is fixedly connected to the upper surface of the second threaded seat, a second threaded rod is rotatably connected inside the second slide rail, and the second threaded seat and the second threaded rod are threadedly connected.

[0015] Preferably, a third threaded seat is slidably connected inside the third slide rail, a protective cover is fixedly connected to the upper surface of the third threaded seat, a third threaded rod is rotatably connected inside the third slide rail, and the third threaded seat and the third threaded rod are threadedly connected.

[0016] Preferably, a grinding wheel is rotatably connected inside the protective cover, and a water supply plate is fixedly connected to one end of the protective cover near the first slide rail. The water supply plate is located in the area above the grinding wheel, and multiple spray pipes are uniformly fixedly connected to the outer wall of the water supply plate, and the spray pipes are connected to the water supply plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In this invention, the clamping drive structure is optimized, and the traditional split-type independent adjustment jaw structure is abandoned. This enables multiple sets of jaws to extend and retract synchronously and center and lock synchronously, avoiding the tedious process of operators rotating the adjusting screw and adjusting the jaws one by one. This greatly improves the clamping efficiency of mold shaft parts. At the same time, it eliminates the operational errors caused by manual step-by-step adjustment, ensures that the radial clamping force of each set of jaws is uniform and consistent, and eliminates the problem of workpiece eccentric clamping caused by clamping force imbalance.

[0018] 2. In this invention, the bidirectional limiting clamping structure at both ends is optimized to balance the clamping force on the workpiece and compensate for the structural shortcoming of the tail-end ejector pin, which only has axial support and lacks radial limiting. During grinding operations, it can simultaneously constrain the radial wobble and circumferential deflection of shaft parts. Combined with the inherently weak structural rigidity of slender shaft workpieces, it can offset the radial load and grinding stress generated by the grinding wheel, suppress the slight runout at the end of the workpiece and the phenomenon of axial offset, improve the appearance quality and dimensional accuracy of precision mold shaft parts, and meet the precision requirements of high-end mold processing.

[0019] 3. In this invention, while the device is performing the grinding operation, cutting fluid is automatically and precisely sprayed towards the grinding contact point of the shaft parts. On the one hand, this quickly removes a large amount of frictional heat generated by grinding, reducing the working temperature of the workpiece surface and the grinding wheel, and preventing the surface of the shaft parts from annealing or thermal deformation due to high temperature. On the other hand, the cutting fluid is used to flush away the metal chips generated by grinding in a timely manner, preventing hard grinding chips from being trapped on the contact surface between the grinding wheel and the workpiece, and eliminating defects such as scratches and bumps on the workpiece surface. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a precision mold shaft parts grinding device according to the present invention; Figure 2This is a cross-sectional view of the clamping disc of a precision mold shaft-type parts grinding device according to the present invention; Figure 3 This is a cross-sectional view of the rotating disk of a precision mold shaft parts grinding device according to the present invention; Figure 4 This is a cross-sectional view of the fixed shell of a precision mold shaft-type parts grinding device according to the present invention; Figure 5 This is a cross-sectional view of the sleeve section of a precision mold shaft-type parts grinding device according to the present invention; Figure 6 This is a cross-sectional view of the second slide rail of a precision mold shaft-type parts grinding device according to the present invention.

[0021] In the diagram: 1. Machining table; 2. Drive box; 3. Clamping plate; 4. First slide rail; 5. Second slide rail; 6. Support plate; 7. Sleeve; 8. Third slide rail; 9. Protective cover; 10. Grinding wheel; 11. Water supply plate; 12. Spray pipe; 13. Cavity; 14. Rotating disc; 15. Slide seat; 16. Fixed shell; 17. Arc groove; 18. Lever; 19. Arc block; 20. Telescopic groove; 21. Drive shaft; 22. Drive motor; 23. Worm gear; 4. Worm gear; 25. Fixed frame; 26. Return spring; 27. Insert rod; 28. Limiting block; 29. ​​Abutment block; 30. Rotating groove; 31. First threaded rod; 32. First threaded seat; 33. Moving plate; 34. Bracket; 35. Pulling frame; 36. Hinge plate; 37. Ejector pin; 38. Pull rod; 39. Limiting wheel; 40. Second threaded rod; 41. Second threaded seat; 42. Third threaded rod; 43. Third threaded seat; 44. Connecting frame. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] refer to Figures 1-6 The precision mold shaft part grinding device shown includes a processing table 1, on which a clamping assembly is provided. The clamping assembly is used to improve the processing stability of shaft parts. A specific embodiment is shown below: Example

[0024] A drive box 2, a first slide rail 4, and a second slide rail 5 are fixedly connected to the upper surface of the processing table 1. A second threaded seat 41 is slidably connected inside the second slide rail 5. A third slide rail 8 is fixedly connected to the upper surface of the second threaded seat 41. A second threaded rod 40 is rotatably connected inside the second slide rail 5. The second threaded seat 41 and the second threaded rod 40 are threadedly connected. A third threaded seat 43 is slidably connected inside the third slide rail 8. A protective cover 9 is fixedly connected to the upper surface of the third threaded seat 43. A third threaded rod 42 is rotatably connected inside the third slide rail 8. The third threaded seat 43 and the third threaded rod 42 are threadedly connected. A grinding wheel 10 is rotatably connected inside the protective cover 9. A water supply plate 11 is fixedly connected to one end of the protective cover 9 near the first slide rail 4. The water supply plate 11 is located in the area above the grinding wheel 10. Multiple spray pipes 12 are evenly fixedly connected to the outer wall of the water supply plate 11. The spray pipes 12 are connected to the water supply plate 11.

[0025] The processing table 1 serves as the overall load-bearing base of this device, supporting all functional components and ensuring the structural stability of the entire equipment. During operation, the operator can precisely adjust the position of the grinding wheel 10 according to the diameter, length, and grinding position requirements of the shaft parts to be processed.

[0026] First, drive the second threaded rod 40 to rotate, and use the thread transmission principle to drive the second threaded seat 41 to slide horizontally along the second slide rail 5 to complete the coarse adjustment of the horizontal grinding position of the grinding wheel 10, adapting to the grinding requirements of different positions of the workpiece axial direction.

[0027] After the lateral adjustment is completed, the third threaded rod 42 is rotated to drive the third threaded seat 43 to make longitudinal horizontal fine adjustments along the third slide rail 8, precisely controlling the contact depth between the grinding wheel 10 and the outer wall of the shaft part, achieving high-precision control of the grinding feed, and adapting to the fine grinding operation of precision shaft parts of different diameters. While the grinding wheel 10 is rotating at high speed, the external liquid supply device continuously delivers cutting fluid to the inside of the water supply plate 11, and the water supply plate 11 is equipped with a hollow water passage cavity. The cutting fluid is sprayed directionally to the grinding contact point between the grinding wheel 10 and the workpiece through each set of spray pipes 12, realizing simultaneous grinding, cooling and chip removal. The high temperature of grinding is quickly dissipated through continuous liquid cooling heat exchange, avoiding thermal deformation of the workpiece and changes in the surface material properties; at the same time, the grinding chips are discharged in time through fluid flushing, preventing the grinding chips from damaging the workpiece surface. Example

[0028] The clamping assembly includes a clamping disk 3 and a sleeve 7, with the center line of the sleeve 7 being collinear with the center line of the clamping disk 3. The clamping disk 3 has multiple telescopic grooves 20 evenly distributed near the end of the sleeve 7, and a slide block 15 is slidably connected in the telescopic grooves 20. The clamping disk 3 has a cavity 13, and a rotating disk 14 is rotatably connected in the cavity 13. The rotating disk 14 has multiple arc-shaped grooves 17 evenly distributed around its circumference. A lever 18 is fixedly connected to the end of the slide block 15 near the rotating disk 14, and the lever 18 is slidably connected to the arc-shaped grooves 17. A drive motor 22 is fixedly connected in the cavity 13, and a worm gear 23 is fixedly connected to the output end of the drive motor 22. A drive shaft 21 is fixedly connected to the center of the rotating disk 14, and a worm wheel 24 is fixedly connected to the outer wall of the drive shaft 21. The teeth of the worm gear 23 mesh with the teeth of the worm wheel 24.

[0029] First, the end of the precision mold shaft part to be processed is placed at the center of the clamping plate 3. The drive motor 22 inside the clamping plate 3 is started. The output end of the drive motor 22 drives the worm 23 to rotate at high speed. By using the meshing transmission between the worm 23 and the worm wheel 24, the power of the high-speed rotation is converted into high torque low-speed rotation, which drives the drive shaft 21 fixed to the worm wheel 24 to rotate stably, thereby driving the rotating plate 14 to rotate synchronously and uniformly inside the cavity 13 of the clamping plate 3.

[0030] A fixed housing 16 is fixedly connected to the end of the slide block 15 away from the lever 18. A limit block 28 is slidably connected inside the fixed housing 16. A fixed frame 25 is fixedly connected to the outer wall of the fixed housing 16. An insertion rod 27 is slidably connected inside the fixed frame 25. A return spring 26 is sleeved on the outer wall of the insertion rod 27. The insertion rod 27 passes through the fixed housing 16 and is inserted into the limit block 28. An arc-shaped block 19 is fixedly connected to the end of the limit block 28 away from the fixed housing 16. Two rotating grooves 30 are symmetrically opened at the end of the arc-shaped block 19 away from the limit block 28. An abutment block 29 is rotatably connected inside the rotating grooves 30.

[0031] During the rotation of the rotating disk 14, the evenly spaced arc-shaped grooves 17 on its circumference continuously exert radial thrust on each set of levers 18. Due to the trajectory constraint of the arc-shaped grooves 17, multiple sets of levers 18 will synchronously and equidistantly retract inward or expand outward, thereby driving the corresponding multiple sets of slides 15 to perform synchronous radial expansion and contraction along the telescopic groove 20. This linkage structure can achieve synchronous feeding and locking of all clamping points, eliminating the need for operators to rotate the lead screw sequentially and adjust the chucks one by one, greatly simplifying the clamping process of shaft parts and significantly improving the clamping and processing efficiency of batch parts. At the same time, the fully mechanical synchronous transmission method can ensure that the radial clamping stroke and clamping force of each set of arc-shaped blocks 19 on the outer wall of the workpiece are completely consistent, completely eliminating the operational errors caused by manual step-by-step adjustment.

[0032] During the process of locking the workpiece in the slide block 15, the rotatable abutment block 29 at the end of the arc-shaped block 19 directly contacts the outer wall of the shaft part. It can rotate slightly according to the curvature of the outer wall of the workpiece to achieve flexible clamping. This increases the clamping contact area, avoids local indentation and damage to the workpiece caused by point clamping, and can also adapt to the clamping of shaft parts with slight irregular shapes and different outer diameters, thus improving the structural adaptability.

[0033] The fixed shell 16, the limiting block 28, the insertion rod 27 and the return spring 26 constitute a detachable locking structure. The arc block 19 can be quickly replaced according to the size of the machined shaft parts. The clamping structure is stably locked by inserting the insertion rod 27 into the limiting block 28. The return spring 26 can ensure that there is no loosening after the insertion rod 27 is inserted and locked. Example

[0034] A first threaded seat 32 is slidably connected inside the first slide rail 4. A support plate 6 is fixedly connected to the upper surface of the first threaded seat 32. The sleeve 7 is rotatably connected to the support plate 6. A first threaded rod 31 is rotatably connected inside the first slide rail 4. The first threaded seat 32 is threadedly connected to the first threaded rod 31.

[0035] During operation, by rotating the first threaded rod 31, the first threaded seat 32 is driven to slide longitudinally along the first slide rail 4. The overall position of the support plate 6 and the sleeve 7 can be adjusted according to the actual length of the shaft workpiece to meet the clamping requirements of workpieces of different lengths.

[0036] Multiple supports 34 are evenly and fixedly connected to one end of the sleeve 7 near the clamping plate 3. A movable plate 33 is slidably connected inside the sleeve 7. A pin 37 is fixedly connected to the center of the movable plate 33. Multiple pull rods 38 are evenly and fixedly connected to the movable plate 33 along the circumference. A pulling frame 35 is rotatably connected to one end of the support 34 away from the sleeve 7. A hinge plate 36 is rotatably connected to one end of the pull rod 38 away from the movable plate 33. The hinge plate 36 is rotatably connected to the pulling frame 35 at one end away from the pull rod 38. A connecting frame 44 is fixedly connected to the end of the pulling frame 35. A limit wheel 39 is rotatably connected inside the connecting frame 44.

[0037] During workpiece clamping, the linkage structure drives the moving plate 33 to slide axially inside the sleeve 7, pushing the center pin 37 to press against the center hole at the tail end of the workpiece, thus achieving axial positioning support for the workpiece. At the same time, multiple sets of circumferentially arranged limiting wheels 39 fit against the outer wall of the workpiece end, providing radial auxiliary limiting. They cooperate with the synchronous locking structure of the front clamping plate 3 to form a two-way limiting clamping structure, ensuring that the two ends of the workpiece are subjected to balanced force and sufficient limiting, eliminating problems such as axial offset and workpiece runout, and ensuring the high-precision grinding and processing effect of precision shaft parts.

[0038] The working principle of this invention is as follows: The operator places the end of the shaft part in the center of the clamping disk 3, starts the drive motor 22 in the cavity 13 of the clamping disk 3, and drives the drive shaft 21 to rotate the rotating disk 14 at low speed and high torque through the meshing transmission of the worm gear 23 and the worm wheel 24. With the help of the trajectory constraint of the arc-shaped groove 17 opened in the circumference of the rotating disk 14, the lever 18 is turned to drive multiple sets of slides 15 to synchronously extend and retract radially along the telescopic groove 20, so that the arc-shaped blocks 19 at the ends of the slides 15 synchronously close and lock the workpiece. The rotatable abutment block 29 at the end of the arc-shaped block 19 can adapt to the curvature of the outer wall of the workpiece to achieve flexible and close clamping. The fixed shell 16, the limiting block 28, the insertion rod 27 and the return spring 26 constitute a detachable locking structure, which allows for quick replacement of the arc-shaped block 19 to adapt to workpieces with different outer diameters. Simultaneously, the rotation of the first threaded rod 31 drives the first threaded seat 32 to move along the first slide rail 4, thereby displacing the support plate 6 and sleeve 7 to adapt to workpieces of different lengths. The ejector pin 37 inside the sleeve 7 presses against the center hole at the tail end of the workpiece, and works in conjunction with the circumferential limiting wheel 39 controlled by the bracket 34, the pull frame 35, the hinge plate 36, and the pull rod 38 to achieve axial and radial bidirectional limiting, preventing workpiece axis offset and grinding jump problems. Rotating the second threaded rod 40 inside the second slide rail 5 drives the second threaded seat 41 to slide laterally through the threaded transmission, completing the coarse adjustment of the axial grinding position of the grinding wheel 10; then, by rotating the third threaded rod 42 inside the third slide rail 8, the third threaded seat 43 drives the protective cover 9 and the grinding wheel 10 to make longitudinal fine adjustments, precisely controlling the grinding feed. During the grinding operation, the grinding wheel 10 inside the protective cover 9 rotates at high speed to complete the grinding process. At the same time, the external fluid supply equipment delivers cutting fluid to the water supply plate 11 above the grinding wheel 10. The cutting fluid is then sprayed directionally onto the grinding point through multiple sets of spray pipes 12 evenly distributed on the outer wall of the water supply plate 11. The cutting fluid can quickly dissipate the high temperature of grinding, prevent thermal deformation and material changes of the workpiece, and at the same time flush out grinding chips, avoiding damage to the workpiece surface caused by grinding chips.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precision mold shaft-type parts grinding device, comprising a processing table (1), characterized in that: The machining table (1) is provided with a clamping assembly, which is used to improve the machining stability of shaft parts; The clamping assembly includes a clamping disk (3) and a sleeve (7), and the center line of the sleeve (7) is collinear with the center line of the clamping disk (3). The clamping disk (3) has a plurality of telescopic grooves (20) evenly distributed near the end of the sleeve (7). A slide block (15) is slidably connected in the telescopic groove (20). The clamping disk (3) has a cavity (13) rotatably connected in the cavity (13). The rotating disk (14) has a plurality of arc-shaped grooves (17) evenly distributed in the circumferential direction. A lever (18) is fixedly connected to the end of the slide block (15) near the rotating disk (14), and the lever (18) is slidably connected to the arc-shaped groove (17). The sleeve (7) is uniformly fixedly connected to a plurality of brackets (34) at one end near the clamping plate (3). A movable plate (33) is slidably connected inside the sleeve (7). A pin (37) is fixedly connected at the center of the movable plate (33). A plurality of pull rods (38) are uniformly fixedly connected around the movable plate (33). A pulling frame (35) is rotatably connected to one end of the bracket (34) away from the sleeve (7). A hinge plate (36) is rotatably connected to one end of the pull rod (38) away from the movable plate (33). The hinge plate (36) is rotatably connected to the pulling frame (35) at one end away from the pull rod (38).

2. The precision mold shaft part grinding device according to claim 1, characterized in that: The slide (15) is fixedly connected to a fixed shell (16) at the end away from the lever (18). A limit block (28) is slidably connected inside the fixed shell (16). A fixed frame (25) is fixedly connected to the outer wall of the fixed shell (16).

3. The precision mold shaft part grinding device according to claim 2, characterized in that: A rod (27) is slidably connected inside the fixing frame (25). A reset spring (26) is sleeved on the outer wall of the rod (27). The rod (27) passes through the fixing shell (16) and is inserted into the limiting block (28).

4. The precision mold shaft part grinding device according to claim 3, characterized in that: An arc-shaped block (19) is fixedly connected to the end of the limiting block (28) away from the fixed shell (16). Two rotating grooves (30) are symmetrically opened at the end of the arc-shaped block (19) away from the limiting block (28). An abutment block (29) is rotatably connected in the rotating groove (30).

5. The precision mold shaft part grinding device according to claim 1, characterized in that: A drive motor (22) is fixedly connected inside the cavity (13). A worm (23) is fixedly connected to the output end of the drive motor (22). A drive shaft (21) is fixedly connected at the center of the rotating disk (14). A worm wheel (24) is fixedly connected to the outer wall of the drive shaft (21). The teeth of the worm (23) mesh with the teeth of the worm wheel (24).

6. The precision mold shaft part grinding device according to claim 1, characterized in that: The end of the pull frame (35) is fixedly connected to a connecting frame (44), and a limit wheel (39) is rotatably connected inside the connecting frame (44). The upper surface of the processing table (1) is fixedly connected to a drive box (2), a first slide rail (4), and a second slide rail (5).

7. The precision mold shaft part grinding device according to claim 6, characterized in that: The first slide rail (4) is slidably connected to a first threaded seat (32), and a support plate (6) is fixedly connected to the upper surface of the first threaded seat (32). The sleeve (7) is rotatably connected to the support plate (6). The first slide rail (4) is rotatably connected to a first threaded rod (31), and the first threaded seat (32) is threadedly connected to the first threaded rod (31).

8. The precision mold shaft part grinding device according to claim 6, characterized in that: The second slide rail (5) is slidably connected to a second threaded seat (41), and the upper surface of the second threaded seat (41) is fixedly connected to a third slide rail (8). The second slide rail (5) is rotatably connected to a second threaded rod (40), and the second threaded seat (41) and the second threaded rod (40) are threadedly connected.

9. A precision mold shaft-type parts grinding device according to claim 8, characterized in that: A third threaded seat (43) is slidably connected inside the third slide rail (8), and a protective cover (9) is fixedly connected to the upper surface of the third threaded seat (43). A third threaded rod (42) is rotatably connected inside the third slide rail (8), and the third threaded seat (43) and the third threaded rod (42) are threadedly connected.

10. A precision mold shaft-type parts grinding device according to claim 9, characterized in that: A grinding wheel (10) is rotatably connected inside the protective cover (9). A water supply plate (11) is fixedly connected to one end of the protective cover (9) near the first slide rail (4). The water supply plate (11) is located in the area above the grinding wheel (10). Multiple spray pipes (12) are evenly fixedly connected to the outer wall of the water supply plate (11), and the spray pipes (12) are connected to the water supply plate (11).

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