Numerical control broaching machine tailstock positioning mechanism and mounting method thereof

Abstract

The numerical control broaching machine tailstock positioning mechanism comprises a tailstock body, a positioning and mounting structure and a moving guide rail, locking plates are arranged on the two sides of a positioning table of the moving guide rail, a moving assembly matched with an auxiliary groove and a positioning plate are arranged at the bottom of the tailstock body, and the positioning and mounting structure is mounted on a tailstock side plate; dual fixation of preliminary positioning and deep locking is adopted, a positioning column with a positioning block is screwed into a positioning groove of a positioning plate, and preliminary limiting is achieved through resilience force of a spring; a locking column is pressed and rotated, so that a locking block is embedded into a locking groove of a locking plate, a compression spring is deeply locked through resilience force, transverse and longitudinal displacement of the tailstock can be limited, and machining precision is guaranteed; moving wheels of a moving assembly slide on the arc-shaped inner wall of an auxiliary groove, a roller assembly on the top of a locking plate makes contact with the bottom of the tailstock, the moving resistance is greatly reduced through the double rolling friction design, and operation convenience is improved. The limiting ring and the baffle prevent components from falling off, the spring buffers collision and reduces abrasion, and the service life of the mechanism is prolonged.

Description

Technical Field

[0001] This invention specifically relates to a CNC broaching machine tailstock positioning mechanism and its installation method. Background Technology

[0002] Broaching machines, as efficient and high-precision metal cutting machine tools, are widely used to process various parts with complex internal or external contours. In CNC broaching machines, the tailstock, as a key functional component, is mainly used to support the broaching rod or workpiece, ensuring that it maintains accurate and stable axial positioning during broaching. Its positioning accuracy and rigidity directly affect the machining quality, tool life, and machine tool reliability.

[0003] Traditional broaching machine tailstock positioning typically employs a manual mechanical structure. The tailstock body is usually connected to the machine bed via guide rails and secured with bolts to pre-set T-slots or positioning slots on the machine bed. For position adjustments, the bolts must first be completely loosened. The operator then uses a pry bar or similar tool to roughly move the tailstock along the guide rails to the target area. Then, using a dial indicator, feeler gauge, or other measuring tools, the tailstock position is manually fine-tuned against the machine spindle or a fixed datum surface. Finally, the bolts are retightened. This entire adjustment process is cumbersome and time-consuming, significantly increasing the machine tool's preparation time and severely limiting the high-speed and high-efficiency advantages of CNC broaching machines. Furthermore, using bolts for direct rigid locking in the adjustment position means that if there are microscopic unevenness or chips embedded in the guide rail surface or mating surface, the tightening force may force the tailstock body to undergo slight deformation or displacement, compromising the adjusted accuracy. Over long-term use, stress concentration can also lead to wear on the mating surfaces.

[0004] Therefore, it is necessary to invent a CNC broaching machine tailstock positioning mechanism and its installation method to solve the above problems. Summary of the Invention

[0005] (a) Purpose of the invention The purpose of this invention is to provide a CNC broaching machine tailstock positioning mechanism and its installation method.

[0006] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a CNC broaching machine tailstock positioning mechanism, comprising a tailstock body, wherein a positioning mounting structure is provided at the bottom of the tailstock body, and a moving guide rail is provided at the bottom of the tailstock body; The top of the moving guide rail is provided with a positioning platform, and the top two sides of the positioning platform are provided with locking plates. The inner side of the locking plates is provided with auxiliary grooves. The positioning installation structure is set on the bottom side plate of the tailstock body. The bottom of the tailstock body is also provided with a movable component that matches the auxiliary slot. The bottom of the tailstock body is also provided with a positioning plate located outside the movable component. The positioning plate is matched and installed with the positioning and mounting structure. The positioning and mounting structure includes a positioning post disposed in a mounting hole on the side plate, with positioning blocks extending from both sides of the end of the positioning post. The positioning post passes through the mounting hole, and a spring is provided on the outer wall of the positioning post inside the mounting hole. The positioning plate is provided with a positioning groove that matches the positioning block. A telescopic hole is provided inside the positioning post, and a locking post is installed in the telescopic hole. The end of the locking post passes through the telescopic hole to one side of the locking plate, and locking blocks are provided on both sides of the end of the locking post. Rotation of the locking post causes the locking blocks to rotate to one side of the locking plate. A compression spring is provided on the outer wall of the locking post inside the telescopic hole.

[0007] Preferably, the locking plate is fixed to the top of the positioning platform, and the locking plate has a through groove, the inner edge of the through groove has a locking groove, the locking blocks on both sides of the locking post end rotate into the locking groove, and the top of the locking plate also has a placement groove, in which a roller assembly is installed.

[0008] Preferably, the roller assembly includes a fixed shaft disposed on both sides of the inner wall of the mounting groove, a roller is mounted on the outer wall of the fixed shaft, a plurality of roller assemblies are evenly spaced and installed, and the ends of the rollers contact the bottom of the tailstock body.

[0009] Preferably, the end of the positioning post is provided with a groove at the position of the positioning block, one end of the spring is installed in the groove, and the other end is disposed inside the limiting ring of the external opening of the mounting hole. The rotation of the positioning post rotates the positioning block into the positioning groove.

[0010] Preferably, the end of the positioning post is provided with a knob, and the outer wall of the knob is provided with multiple anti-slip grooves.

[0011] Preferably, the outer wall of the locking post is provided with a baffle, one end of the compression spring is disposed inside the baffle, a limiting ring is provided at both the inner and outer openings of the telescopic hole, the other end of the compression spring is disposed inside the limiting ring, and the end of the locking post extends to the inner side of the locking plate.

[0012] Preferably, the locking post end is provided with a handle located on the outside of the positioning post, and the handle is provided on both sides of the locking post end.

[0013] Preferably, the movable component includes multiple fixing frames fixed to the bottom of the tailstock body, with movable wheels installed at the bottom of the multiple fixing frames, and the ends of the multiple movable wheels contacting the auxiliary groove, the interior of the auxiliary groove being arc-shaped.

[0014] A method for installing a CNC broaching machine tailstock positioning mechanism includes: S1. Align the movable component at the bottom of the tailstock body with the auxiliary groove on the movable guide rail. The movable wheels at the bottom of the multiple fixed brackets of the movable component are in contact with the arc-shaped inner wall of the auxiliary groove. Push the tailstock body so that the movable wheels slide along the auxiliary groove and drive the tailstock body to move along the movable guide rail to the target position. S2. Rotate the knob at the end of the positioning post. The positioning post drives the positioning blocks on both sides to rotate synchronously until the positioning blocks are embedded in the positioning groove on the positioning plate. During this process, the spring on the outer wall of the positioning post undergoes elastic deformation between the groove and the limiting ring. The spring's rebound force acts on the positioning post, making the positioning block and the positioning groove tightly engaged, thus completing the initial positioning of the tailstock body and the positioning plate. S3. Hold the handles on both sides of the locking pin end, press the locking pin into the telescopic hole, so that the baffle on the outer wall of the locking pin compresses the compression spring inside the limiting ring, then rotate the locking pin to drive the locking blocks on both sides of its end to rotate until the locking blocks are embedded in the locking groove on the locking plate; release the handles, the rebound force of the compression spring pushes the baffle, so that the locking blocks and the locking groove fit tightly together, completing the deep locking of the tailstock body and the moving guide rail. S4. During the movement of the tailstock body, the roller assembly in the groove at the top of the locking plate works synchronously. The rollers on the outer wall of the fixed shaft continuously contact the bottom of the tailstock body, converting the sliding friction between the tailstock body and the locking plate into rolling friction, reducing the moving resistance, and ensuring the stability of the tailstock body during movement. S5. When it is necessary to adjust the position of the tailstock body, first hold the handle and press and rotate the locking pin in the opposite direction to disengage the locking block from the locking groove and release the locking state between the tailstock body and the moving guide rail; then rotate the knob in the opposite direction to disengage the positioning block from the positioning groove and release the positioning state between the tailstock body and the positioning plate; then push the tailstock body to make the moving wheel slide along the auxiliary groove, and drive the tailstock body to move along the moving guide rail to the new target position. Repeat steps S2-S3 to complete the repositioning.

[0015] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of the present invention are: 1. This invention adopts a dual fixing structure of preliminary positioning and deep locking. First, the positioning pin drives the positioning block to screw into the positioning groove, and the spring rebound force realizes the preliminary positioning of the tailstock body and the positioning plate. Then, by pressing and rotating the locking pin, the locking block is embedded into the locking groove of the locking plate, and the spring rebound force of the compression spring completes the deep locking. The dual positioning structure can effectively limit the lateral and longitudinal displacement of the tailstock body, avoid the tailstock from shaking or shifting during broaching, and ensure machining accuracy. 2. The movable wheel at the bottom of the tailstock body of the present invention slides in match with the arc-shaped inner wall of the auxiliary groove, converting part of the sliding friction when the tailstock moves into rolling friction; the roller assembly at the top of the locking plate contacts the bottom of the tailstock body, further replacing the sliding friction between the tailstock and the locking plate into rolling friction; the dual rolling friction design greatly reduces the resistance when the tailstock moves, and the operator can easily push the tailstock body to adjust its position, improving the convenience of operation and adjustment efficiency; 3. The positioning pin and locking pin of the present invention adopt a nested design. The limiting ring of the telescopic hole cooperates with the baffle to limit the extension and retraction stroke of the locking pin and prevent the parts from falling off. The setting of spring and compression spring can provide the rebound force for positioning and locking, and also buffer the hard collision between components to reduce wear. The moving wheel and roller both adopt a rotatable structure to avoid frictional wear between components. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of the tailstock body and the moving guide rail of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the disassembled structure of the tailstock body and the moving guide rail of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the disassembled positioning and installation structure of the present invention; Figure 5 This is a schematic diagram of the specific installation structure of the positioning and installation structure of the present invention; Figure 6 This is a schematic diagram of the locking plate mounting structure of the present invention; Figure 7 This is a schematic diagram of the disassembled positioning post and locking post structure of the present invention. Figure 1 ; Figure 8 This is a schematic diagram of the disassembled positioning post and locking post structure of the present invention. Figure 2 .

[0018] Explanation of reference numerals in the attached figures: 1. Tailstock body; 11. Side plate; 12. Positioning plate; 13. Mounting hole; 14. Positioning groove; 15. Limiting ring; 2. Positioning and mounting structure; 21. Positioning post; 211. Groove; 212. Knob; 213. Anti-slip groove; 22. Positioning block; 23. Spring; 24. Telescopic hole; 241. Limiting ring; 25. Locking post; 251. Baffle; 26. Locking block; 27. Compression spring; 28. Handle; 3. Moving guide rail; 31. Positioning platform; 32. Locking plate; 33. Auxiliary groove; 34. Through groove; 35. Locking groove; 36. Placement groove; 4. Moving assembly; 41. Fixing frame; 42. Moving wheel; 5. Roller assembly; 51. Fixed shaft; 52. Roller. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] This invention provides, for example Figure 1-8 The tailstock positioning mechanism of a CNC broaching machine shown includes a tailstock body 1, a positioning mounting structure 2 at the bottom of the tailstock body 1, and a moving guide rail 3 at the bottom of the tailstock body 1. The top of the moving guide rail 3 is provided with a positioning platform 31, and the top two sides of the positioning platform 31 are provided with locking plates 32. The inner side of the locking plates 32 is provided with an auxiliary groove 33. The positioning installation structure 2 is set on the bottom side plate 11 of the tailstock body 1. The bottom of the tailstock body 1 is also provided with a moving component 4 that matches the auxiliary groove 33. The bottom of the tailstock body 1 is also provided with a positioning plate 12 located outside the moving component 4. The positioning plate 12 is matched and installed with the positioning and mounting structure 2. The positioning and mounting structure 2 includes a positioning post 21 disposed in a mounting hole 13 on the side plate 11. Positioning blocks 22 extend from both sides of the end of the positioning post 21. The positioning post 21 passes through the mounting hole 13, and a spring 23 is provided on the outer wall of the positioning post 21 inside the mounting hole 13. The positioning plate 12 is provided with a positioning groove 14 that matches the positioning block 22. A telescopic hole 24 is provided in the positioning post 21. A locking post 25 is installed in the telescopic hole 24. The end of the locking post 25 passes through the telescopic hole 24 to one side of the locking plate 32, and locking blocks 26 are provided on both sides of the end of the locking post 25. The locking post 25 rotates, causing the locking blocks 26 to rotate to one side of the locking plate 32. A compression spring 27 is provided on the outer wall of the locking post 25 inside the telescopic hole 24.

[0021] The locking plate 32 is fixed to the top of the positioning platform 31, and the locking plate 32 is provided with a through groove 34. The inner edge of the through groove 34 is provided with a locking groove 35. The locking blocks 26 on both sides of the end of the locking post 25 are rotated into the locking groove 35. The top of the locking plate 32 is also provided with a placement groove 36, and a roller assembly 5 is installed in the placement groove 36.

[0022] The roller assembly 5 includes a fixed shaft 51 disposed on both sides of the inner wall of the mounting groove 36, and a roller 52 is mounted on the outer wall of the fixed shaft 51. Multiple roller assemblies 5 are evenly spaced and installed, and the ends of the rollers 52 contact the bottom of the tailstock body 1.

[0023] The end of the positioning post 21 is provided with a groove 211 at the position of the positioning block 22. One end of the spring 23 is installed in the groove 211, and the other end is set inside the limiting ring 15 with the external opening of the mounting hole 13. The positioning post 21 rotates to rotate the positioning block 22 into the positioning groove 14.

[0024] The end of the positioning post 21 is provided with a knob 212, and the outer wall of the knob 212 is provided with multiple anti-slip grooves 213.

[0025] The outer wall of the locking post 25 is provided with a baffle 251, one end of the compression spring 27 is located inside the baffle 251, and the inner and outer openings of the telescopic hole 24 are provided with limit rings 241. The other end of the compression spring 27 is located inside the limit rings 241, and the end of the locking post 25 extends to the inner side of the locking plate 32.

[0026] The locking post 25 has a handle 28 located on the outside of the positioning post 21 at its end. The handle 28 is located on both sides of the end of the locking post 25.

[0027] The moving component 4 includes multiple fixing brackets 41 fixed to the bottom of the tailstock body 1. The bottom of the multiple fixing brackets 41 is equipped with moving wheels 42. The ends of the multiple moving wheels 42 are in contact with the auxiliary groove 33. The interior of the auxiliary groove 33 is arc-shaped.

[0028] A method for installing a CNC broaching machine tailstock positioning mechanism includes: S1. Align the movable component 4 at the bottom of the tailstock body 1 with the auxiliary groove 33 on the movable guide rail 3. The movable wheels 42 at the bottom of the multiple fixing brackets 41 of the movable component 4 fit against the arc-shaped inner wall of the auxiliary groove 33, push the tailstock body 1, and make the movable wheels 42 slide along the auxiliary groove 33, thereby driving the tailstock body 1 to move along the movable guide rail 3 to the target position. S2. Rotate the knob 212 at the end of the positioning post 21. The positioning post 21 drives the positioning blocks 22 on both sides to rotate synchronously until the positioning blocks 22 are embedded in the positioning groove 14 on the positioning plate 12. During this process, the spring 23 on the outer wall of the positioning post 21 undergoes elastic deformation between the groove 211 and the limiting ring 15. The spring's rebound force acts on the positioning post 21, making the positioning blocks 22 and the positioning groove 14 tightly engaged, thus completing the initial positioning of the tailstock body 1 and the positioning plate 12. S3. Hold the handles 28 on both sides of the end of the locking pin 25, press the locking pin 25 into the telescopic hole 24, so that the baffle 251 on the outer wall of the locking pin 25 compresses the compression spring 27 on the inner side of the limiting ring 241, then rotate the locking pin 25, causing the locking blocks 26 on both sides of its end to rotate, until the locking blocks 26 are embedded in the locking groove 35 on the locking plate 32; release the handles 28, the rebound force of the compression spring 27 pushes the baffle 251, so that the locking blocks 26 and the locking groove 35 fit tightly together, completing the deep locking of the tailstock body 1 and the moving guide rail 3; S4. During the movement of the tailstock body 1, the roller assembly 5 in the top mounting groove 36 of the locking plate 32 works synchronously, and the roller 52 on the outer wall of the fixed shaft 51 continuously contacts the bottom of the tailstock body 1, converting the sliding friction between the tailstock body 1 and the locking plate 32 into rolling friction, reducing the moving resistance, and ensuring the stability of the movement of the tailstock body 1. S5. When it is necessary to adjust the position of the tailstock body 1, first hold the handle 28 and press and rotate the locking pin 25 in the opposite direction to make the locking block 26 disengage from the locking groove 35, thereby releasing the locking state between the tailstock body 1 and the moving guide rail 3; then rotate the knob 212 in the opposite direction to make the positioning block 22 disengage from the positioning groove 14, thereby releasing the positioning state between the tailstock body 1 and the positioning plate 12; then push the tailstock body 1 to make the moving wheel 42 slide along the auxiliary groove 33, thereby moving the tailstock body 1 along the moving guide rail 3 to the new target position, and repeat steps S2-S3 to complete the repositioning.

[0029] In this invention, the moving guide rail 3 is horizontally fixed at a designated installation position on a CNC broaching machine. Then, locking plates 32 are symmetrically installed on both sides of the top of the positioning table 31 of the moving guide rail 3, ensuring that the auxiliary groove 33 on the inner side of the locking plate 32 is arc-shaped and the groove openings face the same direction. Roller assembly 5 is installed in the placement groove 36 at the top of the locking plate 32. The two ends of the fixed shaft 51 are fixed to the inner wall of the placement groove 36. Then, the roller 52 is sleeved on the outer wall of the fixed shaft 51, ensuring that the roller 52 can rotate freely. Multiple roller assemblies 5 are evenly distributed in the placement groove 36. Mounting holes 13 are opened on the side plate 11 at the bottom of the tailstock body 1. The positioning post 21 is inserted into the mounting hole 13. A spring 23 is installed in the groove 211 on the outer wall of the positioning post 21. The other end of the spring 23 abuts against the inner side of the limiting ring 15 at the outer opening of the mounting hole 13. Then, a knob 212 with an anti-slip groove 213 is installed at the end of the positioning post 21.

[0030] Specifically, a locking pin 25 is installed inside the telescopic hole 24 of the positioning pin 21. One end of a compression spring 27 is sleeved on the outer wall of the locking pin 25 and abuts against the inner side of the baffle 251, while the other end abuts against the inner side of the limiting ring 241 at the opening of the telescopic hole 24. Handles 28 are then installed on both sides of the end of the locking pin 25 to ensure that the locking pin 25 can extend, retract, and rotate within the telescopic hole 24. A moving component 4 is installed at the bottom of the tailstock body 1. Multiple fixing brackets 41 are evenly fixed at the bottom of the tailstock body 1. Moving wheels 42 are then installed at the bottom of the fixing brackets 41. The tailstock body 1 is then hoisted above the moving guide rail 3 so that the moving wheels 42 are embedded in the auxiliary groove 33, while ensuring that the rollers 52 are in contact with the bottom of the tailstock body 1. A positioning plate 12 is installed on the outer side of the moving component 4 at the bottom of the tailstock body 1 so that the positioning groove 14 on the positioning plate 12 corresponds to the positioning block 22 at the end of the positioning pin 21, thus completing the assembly of the entire positioning mechanism.

[0031] Specifically, the operator pushes the tailstock body 1, causing the moving wheel 42 of the bottom moving component 4 to slide along the arc-shaped inner wall of the auxiliary groove 33. During this process, the roller 52 on the top of the locking plate 32 rolls against the bottom of the tailstock body 1, converting sliding friction into rolling friction, reducing the moving resistance, until the tailstock body 1 moves to the target position required for processing.

[0032] Specifically, the operator rotates the knob 212, causing the positioning column 21 to rotate synchronously. The positioning block 22 at the end of the positioning column 21 rotates accordingly and is embedded in the positioning groove 14 of the positioning plate 12. At the same time, the spring 23 on the outer wall of the positioning column 21 undergoes elastic deformation. The spring's rebound force makes the positioning block 22 tightly engage with the positioning groove 14, preventing the tailstock body 1 from undergoing lateral displacement.

[0033] Specifically, the operator holds the handle 28 at the end of the locking pin 25 and presses the locking pin 25 towards the telescopic hole 24. At this time, the baffle 251 on the outer wall of the locking pin 25 compresses the compression spring 27. Then, the locking pin 25 is rotated, which drives the locking block 26 at the end to rotate into the locking groove 35 of the locking plate 32. After releasing the handle 28, the rebound force of the compression spring 27 pushes the baffle 251, so that the locking block 26 and the locking groove 35 fit tightly together, completing the locking of the tailstock body 1 and the moving guide rail 3, and realizing the precise positioning of the tailstock.

[0034] Specifically, when it is necessary to adjust the processing position of the tailstock body 1, the operator first holds the handle 28, presses and rotates the locking pin 25 in the opposite direction to disengage the locking block 26 from the locking groove 35, thereby releasing the locking state between the tailstock body 1 and the moving guide rail 3; then rotates the knob 212 in the opposite direction to drive the positioning block 22 out of the positioning groove 14, thereby releasing the initial positioning state; then pushes the tailstock body 1 to make the moving wheel 42 slide along the auxiliary groove 33 to the new target position, repeating the initial positioning and deep locking steps to complete the repositioning of the tailstock body 1.

[0035] In this invention, the mechanism adopts a dual positioning structure of preliminary positioning and deep locking. The positioning block 22 is engaged with the positioning groove 14 by the positioning column 21 to achieve preliminary positioning. Then, the locking block 26 is tightly engaged with the locking groove 35 by the locking column 25 to complete the deep locking. With the rebound force of the spring 23 and the compression spring 27, the tailstock body 1 can be effectively prevented from shifting or shaking during the processing, thus ensuring the processing accuracy of the CNC broaching machine.

[0036] In this invention, the movable wheel 42 at the bottom of the tailstock body 1 slides in match with the arc-shaped inner wall of the auxiliary groove 33, which can reduce the frictional resistance during movement. On the other hand, the roller assembly 5 at the top of the locking plate 32 converts the sliding friction between the tailstock body 1 and the locking plate 32 into rolling friction, further reducing the movement resistance. The operator can easily push the tailstock body 1 for alignment. At the same time, the design of the knob 212 and the handle 28 makes the positioning and unlocking operation simple and convenient, effectively improving the efficiency of tailstock adjustment.

[0037] In this invention, the components of the mechanism are highly matched, the extension and rotation of the positioning post 21 and the locking post 25 do not interfere with each other, the setting of the spring 23 and the compression spring 27 can buffer the force between the components and reduce the wear of the components; in addition, the rolling design of the moving wheel 42 and the roller 52 can avoid hard friction between the components and extend the service life of the entire positioning mechanism.

[0038] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A CNC broaching machine tailstock positioning mechanism, characterized in that: Includes a tailstock body (1), the bottom of which is provided with a positioning and mounting structure (2), and the bottom of which is provided with a moving guide rail (3); The top of the moving guide rail (3) is provided with a positioning platform (31), and the top two sides of the positioning platform (31) are provided with locking plates (32). The inner side of the locking plate (32) is provided with an auxiliary groove (33). The positioning installation structure (2) is set on the bottom side plate (11) of the tailstock body (1). The bottom of the tailstock body (1) is also provided with a moving component (4) that matches the auxiliary groove (33). The bottom of the tailstock body (1) is also provided with a positioning plate (12) located outside the moving component (4). The positioning plate (12) is matched and installed with the positioning installation structure (2). The positioning and mounting structure (2) includes a positioning post (21) disposed in a mounting hole (13) on the side plate (11). Positioning blocks (22) extend from both sides of the end of the positioning post (21). The positioning post (21) passes through the mounting hole (13), and a spring (23) is provided on the outer wall of the positioning post (21) inside the mounting hole (13). A positioning groove (14) matching the positioning block (22) is provided on the positioning plate (12). A telescopic hole (24) is provided in the positioning post (21). A locking post (25) is installed in the telescopic hole (24). The end of the locking post (25) passes through the telescopic hole (24) to one side of the locking plate (32), and locking blocks (26) are provided on both sides of the end of the locking post (25). The locking post (25) rotates and drives the locking blocks (26) to rotate to one side of the locking plate (32). A compression spring (27) is provided on the outer wall of the locking post (25) inside the telescopic hole (24).

2. The CNC broaching machine tailstock positioning mechanism according to claim 1, characterized in that: The locking plate (32) is fixed to the top of the positioning platform (31), and the locking plate (32) is provided with a through groove (34). The inner edge of the through groove (34) is provided with a locking groove (35). The locking blocks (26) on both sides of the end of the locking post (25) are rotated into the locking groove (35). The top of the locking plate (32) is also provided with a placement groove (36), and a roller assembly (5) is installed in the placement groove (36).

3. The CNC broaching machine tailstock positioning mechanism according to claim 2, characterized in that: The roller assembly (5) includes a fixed shaft (51) disposed on both sides of the inner wall of the mounting groove (36), and a roller (52) is mounted on the outer wall of the fixed shaft (51). Multiple roller assemblies (5) are evenly spaced and installed, and the ends of the rollers (52) contact the bottom of the tailstock body (1).

4. The CNC broaching machine tailstock positioning mechanism according to claim 1, characterized in that: The end of the positioning post (21) is provided with a groove (211) at the position of the positioning block (22). One end of the spring (23) is installed in the groove (211), and the other end is set inside the limiting ring (15) of the external opening of the mounting hole (13). The positioning post (21) rotates to rotate the positioning block (22) into the positioning groove (14).

5. The CNC broaching machine tailstock positioning mechanism according to claim 1, characterized in that: The positioning post (21) has a knob (212) at its end, and the outer wall of the knob (212) has multiple anti-slip grooves (213).

6. The CNC broaching machine tailstock positioning mechanism according to claim 1, characterized in that: The outer wall of the locking post (25) is provided with a baffle (251), one end of the compression spring (27) is located inside the baffle (251), the inner and outer openings of the telescopic hole (24) are provided with a limiting ring (241), the other end of the compression spring (27) is located inside the limiting ring (241), and the end of the locking post (25) extends to the inner side of the locking plate (32).

7. The CNC broaching machine tailstock positioning mechanism according to claim 1, characterized in that: The locking post (25) has a handle (28) located on the outside of the positioning post (21) at its end, and the handle (28) is located on both sides of the locking post (25).

8. A CNC broaching machine tailstock positioning mechanism according to claim 1, characterized in that: The moving component (4) includes multiple fixing frames (41) fixed to the bottom of the tailstock body (1). The bottom of the multiple fixing frames (41) is equipped with moving wheels (42). The ends of the multiple moving wheels (42) are in contact with the auxiliary groove (33). The interior of the auxiliary groove (33) is arc-shaped.

9. A method for installing a CNC broaching machine tailstock positioning mechanism according to any one of claims 1-8, characterized in that, include: S1. Align the moving component (4) at the bottom of the tailstock body (1) with the auxiliary groove (33) on the moving guide rail (3). The moving wheels (42) at the bottom of the multiple fixing brackets (41) of the moving component (4) fit against the arc-shaped inner wall of the auxiliary groove (33), push the tailstock body (1), and make the moving wheels (42) slide along the auxiliary groove (33), thereby driving the tailstock body (1) to move along the moving guide rail (3) to the target position. S2. Rotate the knob (212) at the end of the positioning column (21). The positioning column (21) drives the positioning blocks (22) on both sides to rotate synchronously until the positioning blocks (22) are embedded in the positioning groove (14) on the positioning plate (12). During this process, the spring (23) on the outer wall of the positioning column (21) undergoes elastic deformation between the groove (211) and the limiting ring (15). The spring's rebound force acts on the positioning column (21), making the positioning block (22) and the positioning groove (14) tightly engaged, thus completing the initial positioning of the tailstock body (1) and the positioning plate (12). S3. Hold the handles (28) on both sides of the end of the locking post (25), press the locking post (25) into the telescopic hole (24) first, so that the baffle (251) on the outer wall of the locking post (25) compresses the compression spring (27) on the inner side of the limiting ring (241), then rotate the locking post (25) to drive the locking blocks (26) on both sides of its end to rotate until the locking blocks (26) are embedded in the locking groove (35) on the locking plate (32); release the handles (28), the rebound force of the compression spring (27) pushes the baffle (251) to make the locking blocks (26) fit tightly with the locking groove (35), and complete the deep locking of the tailstock body (1) and the moving guide rail (3); S4. During the movement of the tailstock body (1), the roller assembly (5) in the top mounting groove (36) of the locking plate (32) works synchronously, and the roller (52) on the outer wall of the fixed shaft (51) continuously contacts the bottom of the tailstock body (1), converting the sliding friction between the tailstock body (1) and the locking plate (32) into rolling friction, reducing the moving resistance, and ensuring the stability of the movement of the tailstock body (1). S5. When it is necessary to adjust the position of the tailstock body (1), first hold the handle (28) and press and rotate the locking pin (25) in the opposite direction to make the locking block (26) disengage from the locking groove (35) and release the locking state between the tailstock body (1) and the moving guide rail (3); then rotate the knob (212) in the opposite direction to make the positioning block (22) disengage from the positioning groove (14) and release the positioning state between the tailstock body (1) and the positioning plate (12); then push the tailstock body (1) so that the moving wheel (42) slides along the auxiliary groove (33) and drives the tailstock body (1) to move along the moving guide rail (3) to the new target position. Repeat steps S2-S3 to complete the repositioning.

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