Locking sliding block end face locking groove processing method and vehicle clamp

Abstract

A locking sliding block end face locking groove processing method and a vehicle clamp, the vehicle clamp, comprising a clamp body, the clamp body surface is equipped with a tool setting seat, a positioning sleeve for locking the sliding block, a positioning pin for locking the locking sliding block, a pressing assembly for pressing the front part of the locking sliding block, the locking sliding block to be processed end face has a plurality of to-be-processed grooves, the tool setting seat is a cylindrical rod, the cylindrical rod surface is equipped with a tool setting groove, the positioning sleeve is sleeved on the outer wall of the locking sliding block, the positioning rod at the tail of the positioning pin is inserted into two round holes, and the locking assembly for locking the position of the positioning pin is further included. The tool setting groove of the tool setting seat is used for positioning and aligning the turning tool, only one tool setting is required, then the plurality of to-be-processed grooves on the to-be-processed end face of the one or more locking sliding blocks on the clamp body can be processed once, and the obvious effect of ensuring product quality and improving processing efficiency is obtained.

Description

Technical Field

[0001] This invention belongs to the field of automotive machining technology, and in particular relates to a machining method and fixture for end face grooves. Background Technology

[0002] The current processing method is as follows: a horizontal milling machine is used, and the locking slider is clamped by the three-jaw chuck of the milling machine. The groove is milled using a 60° disc milling cutter. When machining with a horizontal milling machine, first, according to the dimensions in the drawing, scribing lines on the end face of the locking slider to mark the center lines of the five slots. Then, clamp the locking slider with a three-jaw chuck and fix the chuck to the milling machine's worktable with a pressure plate. Mount a 60° disc milling cutter on the tool post of the horizontal milling machine. Move the tool post until the tip of the disc milling cutter contacts the center line of one of the slots on the locking slider. This completes the tool setting. Fix the tool post. After tool setting, rotate the disc milling cutter to mill the first slot. The diameter of the disc milling cutter is the same as the diameter of the bottom arc of the slot to be machined. The slot depth is ensured by the diameter of the disc milling cutter, and the slot spacing is ensured by the feed rate of the disc milling cutter. To ensure the machining accuracy of the slots, the disc milling cutter needs to be set once before machining each slot, then mill the second slot, and so on, cutting slot by slot until all five slots are machined. The disc milling cutter is made of high-speed steel and has a slow machining speed. A three-jaw chuck clamps the locking slider, and a pressure plate secures the chuck to the milling machine's worktable. During machining, interference between the cutter and the pressure plate / chuck must be prevented, and the cutter must be prevented from hitting the pressure plate. An extended-shank disc milling cutter is used; its long, thin shank makes it prone to vibration and chipping during machining. Furthermore, the locking slider is made of 40Cr hardened HRC35-40, a hard material, and cutter vibration makes it difficult to guarantee accuracy. If the groove spacing (6±0.03mm) and parallelism cannot be guaranteed, the part is unusable and cannot be repaired. The surface roughness of the milled groove is 3.2μm. After machining, manual grinding and polishing are performed. Existing milling methods involve multiple cutter settings, require grinding and polishing, and cannot form the groove in one pass, resulting in low processing efficiency, inability to meet dimensional and product consistency requirements, and low yield. Summary of the Invention

[0003] The purpose of this invention is to solve the aforementioned processing problems, thereby providing a method and fixture for processing locking grooves on the end face of locking sliders, which has significant effects on ensuring product quality and improving processing efficiency.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A method for machining a locking groove on the end face of a locking slider, characterized by the following steps:

[0006] The clamping process involves mounting the fixture onto the lathe spindle of the lathe and attaching the locking slider to the fixture. The fixture includes a fixture body with a tool setting seat, a positioning sleeve for locking the slider, a positioning pin for locking the slider, and a clamping assembly for pressing the front of the locking slider. The end face of the locking slider to be machined has multiple machining grooves. The tool setting seat is a cylindrical rod with a tool setting groove on its surface. The positioning sleeve is fitted onto the outer wall of the locking slider, and the positioning rod at the tail of the positioning pin is inserted into two circular holes. The fixture also includes a locking assembly for locking the position of the positioning pin. For tool setting, a triangular CNC insert is mounted on the lathe tool. The lathe tool is moved to the opening of the tool setting groove on the tool setting seat, ensuring that both sides of the triangular CNC insert are fully against the groove wall. The tip of the triangular CNC insert contacts the bottom of the groove, indicating successful tool setting. The machining groove corresponding to the tool setting groove is then identified. The process begins with machining the center of a groove. The cutting tool is then moved radially back to the center position and moved radially a distance B until its tip contacts the machined end face. The fixture rotates, and the cutting tool is then radially fed with a feed value of H, completing one groove. After this groove is machined, the cutting tool is moved back to the center position and axially a distance C. The tool then moves radially to the center of the next groove and is moved radially a distance B. The fixture rotates, and the cutting tool is then radially fed with a feed value of H, completing another groove. This process continues until all grooves are machined. Here, B = RH, R is the radius of the concave arc at the bottom of the groove, H is the groove depth, and the axial movement distance C of the cutting tool is equal to the groove spacing L or a multiple of L.

[0007] During tool setting, any tool setting slot is selected for tool setting; a tool calibration position is also provided between the tool setting and the machining step; the method for calibrating the tool position is as follows: move the cutting tool radially, retract the cutting tool to the center position, move the cutting tool radially a distance B, and contact the end face to be machined with the tool tip, perform pre-machining, and form a pre-machining trajectory on the end face to be machined. Measure whether the distance D between the pre-machining trajectory and the center of the end face to be machined is equal to nL, where n is an integer. If D = nL, the calibration is completed and the machining step is performed; if D ≠ nL, the tool holder position is adjusted until the distance D between the pre-machining trajectory and the center of the end face to be machined is equal to nL.

[0008] During tool setting, the tool setting slot located in the middle is selected for tool setting; a tool calibration position is also provided between the tool setting and the machining step; the method for calibrating the tool position is as follows: move the cutting tool radially, retract the cutting tool to the center position, move the cutting tool radially by a distance B, B=RH, and the tool tip contacts the end face to be machined, perform pre-machining, form a pre-machining trajectory on the end face to be machined, measure whether the distance between the pre-machining trajectory and the center of the end face to be machined is zero, if it is zero, the calibration is completed and the machining step is performed; if it is not zero, adjust the tool holder position until the distance between the pre-machining trajectory and the center of the end face to be machined is zero.

[0009] A vehicle fixture for machining locking grooves on the end face of a locking slider includes a fixture body. The surface of the fixture body is provided with a tool setting seat, a positioning sleeve for locking the slider, a positioning pin for locking the slider, and a clamping assembly for pressing the front of the locking slider. The end face of the locking slider to be machined has multiple grooves to be machined. The tool setting seat is a cylindrical rod with a tool setting groove on its surface. The positioning sleeve is fitted onto the outer wall of the locking slider. The positioning rod at the tail of the positioning pin is inserted into two circular holes. The fixture also includes a locking assembly for locking the position of the positioning pin.

[0010] The fixture body surface protrudes forward to form a positioning part, which includes three positioning sub-parts. Each positioning sub-part includes an inner sleeve part near the inner side of the fixture body and an outer sleeve part near the outer side of the fixture body. The inner sleeve part and the outer sleeve part form a positioning sleeve. The inner sleeve part and the outer sleeve part are fitted with positioning bushings. The inner sleeve part and the outer sleeve part are connected as one unit by a connecting block. The connecting block has an assembly hole that mates with the positioning pin. A bushing is installed at the assembly hole. The inner sleeve part of the positioning sub-part in the middle is connected to the positioning sub-parts on both sides to form an opening. The tool holder is bolted to the fixture body outside the opening. After the locking slider is positioned by the positioning part, the end faces to be machined of each locking slider and the tool holder are arranged around the central hole of the fixture body.

[0011] A clamping assembly is inserted into the inner sleeve; the clamping assembly includes a bolt, a fixed clamping block, and a movable clamping block. The head of the bolt is inserted into the stepped hole of the fixed clamping block, a compression spring is fitted in the middle of the bolt's screw, the movable clamping block is fitted in front of the screw of the compression spring, and a clamping nut for clamping the movable clamping block is installed at the tail of the screw.

[0012] The locking assembly includes a steel ball and a spring elastically connected to the steel ball. A screw plug for adjusting the spring pressure is fixedly mounted on the lower part of the clamping body. In the free state, the upper part of the steel ball protrudes from the surface of the clamping body. The head of the positioning pin has a positioning hole, and the opening of the positioning hole is rounded to form a chamfer. The positioning pin surface at both ends of the positioning hole opening has two flat surfaces. There is a hole at the outer end of the positioning pin. When pulling the positioning pin outward, it is difficult to pull outward because the contact surface is relatively small. A ∅6 hole is drilled near the end face of the positioning pin to facilitate pulling outward. In use, a rope can also be threaded through this hole, and the pin can be pulled outward by pulling the rope, which is convenient and saves effort. When the upper part of the steel ball is pressed against the chamfer of the positioning pin, the position of the positioning pin is locked.

[0013] The lower part of the fixture is equipped with a flange. The middle part of the fixture and the flange has a positioning hole that mates with the lathe shaft. The flange and the fixture have mounting holes that mate with the locking assembly. The screw plug is installed at the mounting hole on the flange. The upper opening of the mounting hole on the fixture is fitted with a sleeve for positioning the steel ball. The lower opening of the mounting hole on the fixture aligns with the mounting hole on the flange.

[0014] The tool setting groove is a circular conical groove, and the groove to be machined is a concave arc conical groove. The included angle and groove depth of the two groove walls of the circular conical groove are the same as those of the two groove walls of the concave arc conical groove. The groove distance between two adjacent tool setting grooves is equal to the groove distance between two adjacent grooves to be machined. During tool setting, the intersection of the tip of the triangular CNC insert and the center line of the bottom of the tool setting groove forms a rotation trajectory called circle one when the fixture rotates. The concave arc at the bottom of the groove corresponding to the tool setting groove, circle two, coincides with the center of circle one. The radius of circle one is greater than the radius of circle two, and the radius of circle two is R.

[0015] The clamp is a disc with a forward-protruding positioning part on its surface. The tool holder surface is provided with multiple tool setting grooves from front to back, which correspond one-to-one with the positions of the slots to be processed on the locking slider.

[0016] The present invention is used to mount the automotive fixture on a lathe. After mounting three workpieces (locking sliders) onto the cylindrical end-face tapered groove automotive fixture using this machining device, the workpieces are accurately positioned using transverse screw plugs and longitudinal locating pins, ensuring the end faces are in the same position relative to the center of the machining device. The tapered grooves of the three workpieces and the tapered groove of the tool setter have a fixed positional relationship. Once the workpieces are securely fastened, the cutting tool is positioned and aligned using the annular tapered groove (tool setting groove) of the tool setter. Only one tool setting is required, and then the three locking sliders on the same circumference can be machined in one operation.

[0017] The beneficial effects of this invention are as follows: By using this cylindrical end-face tapered groove machining fixture, the technical problems of existing machining technologies, such as the inability to clamp and process end-face tapered grooves, are effectively solved. It fully considers the processability, making it convenient to install and disassemble the workpieces to be processed, and easy to maintain and use. After clamping, the positioning pin, spring, and Φ8 steel ball are used for fastening and quick positioning, and the center of the tapered groove is quickly found. The tool setter is used to facilitate tool alignment and positioning. Three workpieces to be processed can be clamped at one time, and the alignment and positioning can be completed in one go, effectively ensuring the machining quality and consistency of the cylindrical end-face tapered groove, and ensuring high reliability. Attached Figure Description

[0018] Figure 1 This is one of the structural schematic diagrams of the locking slider;

[0019] Figure 2 yes Figure 1 AA section view;

[0020] Figure 3 This is the second schematic diagram of the locking slider structure;

[0021] Figure 4 yes Figure 3 BB cross-sectional view;

[0022] Figure 5 This is a schematic diagram of the fixture's structure;

[0023] Figure 6 It is a 3D diagram of the fixture;

[0024] Figure 7 This is one of the sectional views of the fixture;

[0025] Figure 8 This is the second sectional view of the fixture;

[0026] Figure 9 This is a schematic diagram of the sleeve structure;

[0027] Figure 10 This is a structural schematic diagram of the clamping assembly. Detailed Implementation

[0028] The technical solutions of the present invention will now be clearly and completely described in conjunction with the accompanying drawings, which are simplified schematic diagrams and are only used to illustrate the basic structure of the present invention.

[0029] like Figure 1-4 The locking slider 101 is a cylindrical rod with a blind hole 102 in the middle from top to bottom. At the opening of the blind hole 102, the upper part of the outer wall of the cylindrical rod has two circular holes 104 and two windows 105. The two circular holes 104 and two windows 105 are symmetrically arranged. One circular hole 104 and one window 105 are alternately arranged on the side wall of the blind hole 103 opening of the cylindrical rod. The end face of the locking slider has a locking groove. The end face 106 of the locking slider to be processed is a plane. After processing the groove 103 on the plane, the finished locking slider is obtained. The groove to be processed consists of 5 grooves with the same groove spacing L. The 5 grooves include 2 half-grooves and 3 conical grooves. The half-grooves are half of the conical grooves and are located on both sides. The concave arc conical grooves are placed between the two half-grooves. The bottom of the concave arc-shaped conical groove is a concave arc with a radius of 21.324 mm. The included angle between the two sides of the groove is 60°. The groove spacing is 6 ± 0.03 mm, the groove depth is 4.324 mm, the parallelism requirement of the groove spacing is 0.03 mm, and the roughness requirement is 1.6 μm. The parallelism ensures that the two sides of two adjacent grooves are completely parallel and the two grooves are completely consistent, which may avoid the groove deviation.

[0030] The locking grooves on the two locking sliders engage with the threaded portion on the surface of the fixed shaft to be fixed, thus positioning the fixed shaft. Precisely machining the locking grooves on the end face of the locking slider to be machined forms the locking slider, which can accurately position the fixed shaft.

[0031] The fixture body 2 is connected to the lathe shaft via flange 1. The installation position of the fixture is aligned through the center hole of the fixture body 2 to prevent the flatness of the fixture body 2 installation from being affected by the waste chips on the lathe, thus affecting the machining accuracy. During machining, first, the end face 106 of the locking slider 101 to be machined faces the center hole of the fixture body 2. The three locking sliders are installed into the positioning bushing 5 holes of the fixture body 2. The positioning pin 11 is passed through the round hole 104 of the locking slider. The sleeve 9, steel ball 10 (Φ8mm), positioning pin 11, and spring 8 (1.2X7X20) are installed in place. The steel ball 10 is stuck in the sleeve 9 and pushed to the innermost part by the spring 8. The steel ball 10 is close to the spring 8. The screw plug 7 is outside the spring. The tightness of the screw plug 7 is adjusted to control the pressure of the spring 8, thereby adjusting the position of the steel ball 10. The steel ball 10 presses against the positioning pin 11. After the positioning is accurate once, the screw plug 7 is no longer adjusted. When the locking slider is tightened, the locating pin 10 passes directly through the round hole 104, and the spring 8 pushes the steel ball 10 to hold the locating pin 11 in place. When disassembling, the steel ball 10 can rotate, and the spring 8 is also elastic. The locating pin 11 can be pulled out by force, thus achieving rapid positioning of the locating pin 10 and fixing the locking slider to be processed in place from the axial and longitudinal directions. After clamping, the tool setting seat 4 is used for tool setting. The tool setting seat 4 is installed on the diameter of the flange 1, and there is a 60° included angle conical groove on the cylindrical surface of the tool setting seat 4. During tool setting, the intersection of the tip of the triangular CNC insert and the center line of the bottom of the tool setting groove 41 forms a rotation trajectory of circle 210 when the fixture body 2 rotates. The circle 211, which is the concave arc of the bottom of the groove to be processed corresponding to the tool setting groove, coincides with the center of circle 210; the radius of circle 1 is greater than the radius of circle 2, and the radius of circle 211 is R. When machining parts, the tool tip can find the center of the concave arc at the bottom of the groove to be machined according to the tool setting groove on the tool setting seat. Then, according to the radius of the conical groove arc of the workpiece, the tool is aligned and positioned to find the center of the conical groove to be machined and the tool feed. The lathe clamps 3 workpieces at a time, the cutting tool is aligned and positioned once, and the 3 conical grooves on one circumference are machined in one operation.

[0032] The tool setter 4 has five tool setting slots, each corresponding to a slot to be machined. During tool setting, the middle slot is selected. A tool calibration position is also provided between the tool setting and machining steps. The calibration method is as follows: move the cutting tool radially, retract it to the center position, move the tool radially a distance B (B=RH), until the tool tip contacts the end face 106 to be machined, and perform pre-machining. A pre-machining trajectory is formed on the end face 106. Measure whether the distance between the pre-machining trajectory and the center of the end face is zero. If it is zero, the calibration is complete, and the machining step is performed. If it is not zero, adjust the tool holder position until the distance between the pre-machining trajectory and the center of the end face is zero. A 60° triangular CNC insert is mounted on the cutting tool.

[0033] Figure 5-8In this invention, the vehicle clamp (also called a fixture) includes a flange 1; a clamping body 2; a tool setter, the tool setter having a 60° tapered groove on its circumference, which serves as a reference point for the concave arc tapered groove 103; it is laterally fastened using a sleeve 9, a steel ball 10, a screw plug 7, and a spring 8; the front part of the locking slider is pressed by a clamping assembly; after the locking slider to be processed is securely fastened, the concave arc tapered groove on the end face of the locking slider and the corresponding annular tapered groove of the tool setter are on the same plane. A counterweight 202 is provided on the outside of the tool setter 4, and a weight-reducing inclined surface 201 is formed by chamfering the edge of the inner sleeve 51 near the counterweight 202.

[0034] The automotive fixture of this invention is installed on a lathe. After the three locking sliders to be machined are mounted onto the fixture using this machining device, the workpieces are accurately positioned using transverse screws and longitudinal locating pins 11, ensuring that their end faces are in the same position relative to the center of the machining device. The conical grooves of the three workpieces and the conical groove of the tool setter 4 have a fixed positional relationship. After the locking sliders are securely fastened, the cutting tool is positioned and aligned using the annular conical groove of the tool setter 4. Then, the three locking sliders on the same circumference can be aligned and positioned in one operation, and machined in one go, effectively ensuring the machining quality and consistency of the conical grooves on the cylindrical end faces, resulting in high reliability. The locating pin 11 has a locating hole at its head, with a rounded corner at the opening. Two flat surfaces are located on the surface of the locating pin at both ends of the locating hole. A hole is located at the outer end of the locating pin. Because the contact area is relatively small, it is difficult to pull the locating pin outwards. A ∅6mm hole is drilled near the end face of the locating pin to facilitate pulling. A rope can also be threaded through this hole, and pulling the pin outwards is easier and less strenuous. When the upper part of the steel ball is pressed against the chamfered part of the locating pin, the position of the locating pin is locked.

[0035] Figure 9 In the middle, the sleeve 9 has an inwardly tapered surface at the opening, which holds the steel ball 10 in place. The size of the steel ball is the same as the size of the inner hole of the sleeve, but there is a gap of 0.04mm. The steel ball can rotate inside the sleeve without falling out.

[0036] Figure 10 In the clamping assembly, there are bolts 203, fixed clamping blocks 206, and movable clamping blocks 205. The head of bolt 203 is inserted into the stepped hole of fixed clamping block 206. A compression spring is installed in the middle of the bolt 203 screw. The screw in front of the compression spring is installed in movable clamping block 205. A clamping nut 204 for clamping movable clamping block 205 is installed at the tail of the screw.

Claims

1. A method for machining a locking groove on the end face of a locking slider, characterized in that: Includes the following steps: 1) Clamping: The fixture is mounted on the lathe spindle of the lathe and the locking slider is mounted on the fixture. The fixture includes a fixture body (2), the surface of which is provided with a tool setting seat (4), a positioning sleeve for locking the slider (101), a positioning pin (11) for locking the slider (101), and a clamping component for pressing the front of the locking slider (101). The end face (106) of the locking slider (101) to be processed has multiple processing grooves (103). The tool setting seat (4) is a cylindrical rod, the surface of which is provided with a tool setting groove (41). The positioning sleeve is fitted on the outer wall of the locking slider (101). The positioning rod at the tail of the positioning pin (11) is inserted into two round holes (104). The fixture also includes a locking component for locking the position of the positioning pin (11). 2) Tool setting: Install a triangular CNC insert on the lathe tool, move the lathe tool to the slot of the tool setting seat (4), so that the two sides of the triangular CNC insert are completely in contact with the slot wall of the tool setting seat, and the tip of the triangular CNC insert contacts the bottom of the slot, that is, the tool setting is successful, and determine the center of the groove to be processed corresponding to the tool setting slot. 3) Machining, then move the cutting tool radially, retract the cutting tool to the center position, move the cutting tool radially by a distance B, and the cutting tip contacts the end face (106) to be machined. The fixture rotates, and then the cutting tool is radially fed with a feed value of H to complete one groove to be machined. After the groove to be machined is completed, retract the cutting tool to the center position, move the cutting tool axially by a distance C, and then the cutting tool moves to the center of the next groove to be machined. Move the cutting tool radially by a distance B, the fixture rotates, and then the cutting tool is radially fed with a feed value of H to complete another groove to be machined. This process continues until all grooves to be machined are completed. Wherein, B=RH, R is the radius of the circle containing the concave arc at the bottom of the groove to be machined, H is the groove depth of the groove to be machined, and the distance C of axially moving the cutting tool is equal to the groove spacing L of the groove to be machined or a multiple of the groove spacing L of the groove to be machined.

2. The method for machining the locking groove on the end face of the locking slider according to claim 1, characterized in that: During tool setting, any tool setting slot is selected for tool setting; a tool calibration position is also provided between the tool setting and the machining step; the method for calibrating the tool position is as follows: move the cutting tool radially, retract the cutting tool to the center position, move the cutting tool radially by a distance B, and make the tool tip contact the end face (106) to be machined, perform pre-machining, form a pre-machining trajectory on the end face (106) to be machined, measure whether the distance D between the pre-machining trajectory and the center of the end face to be machined is equal to nL, where n is an integer. If D = nL, the calibration is completed and the machining step is performed; if D ≠ nL, the tool holder position is adjusted until the distance D between the pre-machining trajectory and the center of the end face to be machined is equal to nL.

3. The method for machining the locking groove on the end face of the locking slider according to claim 1, characterized in that: During tool setting, the tool setting slot located in the middle is selected for tool setting; a tool calibration position is also provided between the tool setting and the machining step; the method for calibrating the tool position is as follows: move the cutting tool radially, retract the cutting tool to the center position, move the cutting tool radially by a distance B, B=RH, and the tool tip contacts the end face (106) to be machined, perform pre-machining, form a pre-machining trajectory on the end face (106) to be machined, measure whether the distance between the pre-machining trajectory and the center of the end face to be machined is zero, if it is zero, the calibration is completed and the machining step is performed; if it is not zero, adjust the tool holder position until the distance between the pre-machining trajectory and the center of the end face to be machined is zero.

4. A machining fixture for processing locking grooves on the end face of a locking slider, characterized in that: The fixture includes a clamping body (2), the surface of which is provided with a tool setting seat (4), a positioning sleeve for locking the slider (101), a positioning pin (11) for locking the slider (101), and a pressing component for pressing the front of the locking slider (101). The end face (106) of the locking slider (101) to be processed has multiple processing grooves (103). The tool setting seat (4) is a cylindrical rod, the surface of which is provided with a tool setting groove (41). The positioning sleeve is fitted on the outer wall of the locking slider (101). The positioning rod at the tail of the positioning pin (11) is inserted into two round holes (104). The fixture also includes a locking component for locking the position of the positioning pin (11). The surface of the clamp body (2) protrudes forward to form a positioning part, which includes three positioning parts. Each positioning part includes an inner sleeve (51) near the inside of the clamp body and an outer sleeve (52) near the outside of the clamp body. The inner sleeve (51) and the outer sleeve (52) form a positioning sleeve. The inner cavity of the inner sleeve (51) and the outer sleeve (52) is fitted with a positioning bushing (5). The inner sleeve (51) and the outer sleeve (52) are connected as one unit by a connecting block. The connecting block has an assembly hole that mates with the positioning pin (11). A bushing (12) is installed at the assembly hole. The inner sleeve (51) of the positioning part in the middle is connected to the positioning parts on both sides to form an opening. The tool holder (4) is bolted to the clamp body (2) outside the opening. After the locking slider (101) is positioned by the positioning part, the end face (106) to be processed of each locking slider (101) and the tool holder (4) are arranged around the center hole of the fixture body (2); The locking assembly includes a steel ball (10), a spring (8) elastically connected to the steel ball (10), and a screw plug (7) for adjusting the pressure of the spring (8) fixedly mounted on the lower part of the clamping body (2); when the spring (8) is in a free state, the upper part of the steel ball (10) protrudes from the surface of the clamping body (2); The head of the positioning pin (11) has a positioning hole, and the opening of the positioning hole is rounded to form a chamfer. The positioning pin surface at both ends of the positioning hole opening has two flat surfaces. When the upper part of the steel ball (10) is pressed onto the chamfer of the positioning pin, the position of the positioning pin (11) is locked.

5. The automotive fixture for machining the locking groove on the end face of the locking slider according to claim 4, characterized in that: The inner sleeve (51) is fitted with a clamping assembly; the clamping assembly includes a bolt (203), a fixed clamping block (206), and a movable clamping block (205). The head of the bolt (203) is inserted into the stepped hole of the fixed clamping block (206). A compression spring is fitted in the middle of the bolt (203). The movable clamping block (205) is fitted in the front of the bolt. A clamping nut (204) for clamping the movable clamping block (205) is fitted at the tail of the bolt.

6. The automotive fixture for machining the locking groove on the end face of the locking slider according to claim 4, characterized in that: The lower part of the fixture (2) is fitted with a flange (1). The middle part of the fixture (2) and the flange (1) has a positioning hole that mates with the lathe shaft. The flange (1) and the fixture (2) have mounting holes that mate with the locking assembly. The screw plug (7) is installed at the mounting hole on the flange (1). The upper opening of the mounting hole on the fixture (2) is fitted with a sleeve (9) for positioning the steel ball (10). The lower opening of the mounting hole on the fixture (2) is connected to the mounting hole on the flange (1).

7. The automotive fixture for machining the locking groove on the end face of the locking slider according to claim 4, characterized in that: The tool setting groove (41) is a circular conical groove, and the groove to be processed is a concave arc conical groove. The included angle and groove depth of the two groove walls of the circular conical groove are the same as the included angle and groove depth of the two groove walls of the concave arc conical groove. The groove distance between two adjacent tool setting grooves (41) is equal to the groove distance between two adjacent grooves to be processed. When setting the tool, the intersection of the tip of the triangular CNC insert and the center line of the bottom of the tool setting groove (41) forms a rotation trajectory of circle one (210) when the fixture body (2) rotates. The circle two (211) where the concave arc of the bottom of the groove to be processed is located, which is the corresponding tool setting groove, coincides with the center of circle one (210). The radius of circle one is greater than the radius of circle two, and the radius of circle two (211) is R.

8. The automotive fixture for machining the locking groove on the end face of the locking slider according to claim 4, characterized in that: The clamping body (2) is a disc with a forward protrusion forming a positioning part. The tool holder (4) has multiple tool setting grooves (41) from front to back that correspond one-to-one with the positions of the slots to be processed on the locking slider.

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