Electric vehicle shock absorber stabilizer bar support welding tool

Abstract

The invention relates to the technical field of electric vehicle part machining, in particular to an electric vehicle shock absorber stabilizer bar support welding tool which comprises an automatic reversing feeding tool arranged on one side of a projection welding machine. The automatic reversing feeding tool comprises a feeding support, a reversing and telescopic assembly, a top plate matched with the reversing and telescopic assembly to stretch out and draw back, and a workpiece storage assembly matched with the reversing and telescopic assembly to feed. Through an automatic reversing feeding tool composed of a feeding support, a reversing and telescopic assembly, a top plate and a piece storage assembly, an efficient and high-reliability welding tool is provided for batch production of shock absorber stabilizer bar supports of new energy electric vehicles, and the tool is driven and limited through a one-way bearing to be alternately meshed with two sets of upper racks; in combination with back-and-forth driving of a servo motor, mechanical circulation logic of material taking, feeding, stripping and resetting is formed, and manual multi-channel operation logic is replaced by automatic mechanical circulation linkage formed by reversing, stretching and stripping.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle component processing, and particularly relates to a welding tooling for a stabilizer bar bracket of an electric vehicle shock absorber. Background Art

[0002] The stabilizer bar bracket of an electric vehicle shock absorber is a core component of the suspension system, mainly used to fix the connection between the stabilizer bar and the vehicle body or subframe, and plays a key role in suppressing vehicle body roll and improving handling stability. In the field of electric vehicles, due to the concentrated weight of the battery pack and the compact chassis layout, the bracket needs to bear greater dynamic loads, and its design needs to take into account high strength, and high-strength steel is mostly used, providing important support for the balanced handling performance of the active suspension system.

[0003] In the existing welding of the stabilizer bar bracket of an electric vehicle shock absorber, the efficiency is low, the safety is weak, the manual operation is cumbersome and error-prone. And the low efficiency and weak safety are the core problems in the welding process of the stabilizer bar bracket of an electric vehicle shock absorber. In the existing welding, two bracket components to be welded need to be manually aligned and placed one by one, and after welding, they are taken off and unloaded one by one. The steps are numerous and time-consuming. Workers need to be in close contact with the high-temperature welding head, which poses a safety hazard. Therefore, a welding tooling for a stabilizer bar bracket of an electric vehicle shock absorber is proposed. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a welding tooling for a stabilizer bar bracket of an electric vehicle shock absorber.

[0005] The technical solution adopted by the present invention to solve its technical problems is a welding tooling for a stabilizer bar bracket of an electric vehicle shock absorber, which includes an automatic reversing feeding tooling arranged on one side of a projection welder. The automatic reversing feeding tooling includes a feeding support, a reversing and telescoping component, a top plate that cooperates with the reversing and telescoping component to telescope, and a storage component that cooperates with the reversing and telescoping component to feed materials. The reversing and telescoping component is arranged on the top of the feeding support, the top plate is arranged on the top of the reversing and telescoping component and is fixedly installed with the frame of the projection welder, and the storage component is arranged at the feeding end of the feeding support, and workpieces are pre-stored in the storage component;

[0006] The feeding support includes a support frame installed on one side of the projection welder frame. The top of the support frame is connected with a support plate, and two ends of the top of the support plate are installed with linear tracks, and sliders are slidably connected to the tops of the linear tracks.

[0007] By adopting the above technical solution, an automatic reversing feeding tooling composed of a feeding support, a reversing and telescoping component, a top plate and a storage component realizes the provision of an efficient and highly reliable welding tooling for the batch production of the stabilizer bar brackets of new energy electric vehicle shock absorbers. The tooling forms a mechanical cycle logic of material taking, feeding, blanking and resetting through the alternating meshing of two groups of side gears restricted by a one-way bearing drive and two groups of upper racks, combined with the reciprocating drive of a servo motor. Among them, the automated mechanical cycle linkage formed by reversing, telescoping and blanking replaces the multi-step operation logic of manual labor.

[0008] Specifically, a reciprocating lead screw for driving the reversing and telescoping component to move between the projection welder and the storage component is arranged on the top of the support plate and between the linear tracks. Both ends of the reciprocating lead screw are rotatably connected to the support plate through bearing seats. A moving seat is installed on the top of the slider through bolts. A lead screw sleeve sleeved with the reciprocating lead screw is installed at the bottom of the moving seat. A servo motor is installed at a corner of one end of the support plate. Synchronous pulleys are installed on the driving end of the servo motor and the shaft head at one end of the reciprocating lead screw. The synchronous pulleys are connected by a synchronous belt.

[0009] By adopting the above technical solution, through the setting of the reciprocating lead screw, after the servo motor drives the corresponding synchronous pulley to rotate, the reciprocating lead screw is driven to rotate through the corresponding synchronous pulley, so that the moving seat sleeved with the reciprocating lead screw through the lead screw sleeve will reciprocate on the support plate, enabling the reversing and telescoping component to reciprocate between the projection welder and the storage component, and enabling the workpiece on the reversing and telescoping component to be continuously and reciprocally sent from the storage component to the welding position of the projection welder for welding treatment.

[0010] Specifically, the reversing and telescoping component includes a reversing box arranged on the top of the moving seat. A double-rod group for supporting the workpiece is arranged through the reversing box. The workpiece includes a rod sleeve and an inner frame.

[0011] The double-rod group includes a round rod for inserting and supporting the rod sleeve and a rectangular rod for positioning the inner frame. The round rod is located at the bottom of the rectangular rod. A positioning sleeve is welded between the middle parts of the round rod and the rectangular rod. Internal teeth are provided at the top of the rectangular rod. A magnet sheet is installed on the bottom surface of the rectangular rod. Through holes corresponding to the round rod and the rectangular rod are respectively arranged through both ends of the reversing box.

[0012] By adopting the above technical solution, through the setting of the double-rod group, a load-carrying support is provided for the workpiece formed by the two components of the rod sleeve and the inner frame to be welded. The round rod provides a sleeved support for the rod sleeve, and the rectangular rod provides a limit for the position of the inner frame on the rod sleeve, so that the welding positions of the rod sleeve and the inner frame to be welded are fixed, and the stability of the rod sleeve and the inner frame during the process of entering the welding position of the projection welder is better.

[0013] Specifically, a steering gear set is provided at the bottom of the commutation box. The steering gear set includes a lower gear with an axial direction perpendicular to the vertical direction of the moving seat. The lower gear is located at the bottom of the moving seat. A central shaft sleeve is fixedly installed at the top center of the lower gear. A through-hole damping rotating shaft is sleeved on the outer circumference of the bottom of the central shaft sleeve. The bottom and top of the through-hole damping rotating shaft are respectively installed with the outer bottom of the central shaft sleeve and the bottom of the moving seat. The top of the central shaft sleeve penetrates through the top of the moving seat and is installed with a flange support. The bottom of the flange support is rotationally connected to the top of the moving seat through a bearing, and the mounting holes on the circumference of the flange support are fixedly installed with the bottom of the commutation box through bolts;

[0014] A lower rack is installed on one side of the top of the support plate close to the projection welder. One side of the lower gear is meshed with the lower rack. During the process of the lower gear moving towards the projection welder along with the moving seat, the lower gear contacts and meshes with the lower rack, prompting the flange support connected to the central shaft sleeve on the lower gear to drive the commutation box to rotate and commutate by 180°, so that the end of the double-rod group supporting the workpiece is commutated from the direction of the storage component to the direction of the projection welder until the workpiece on the double-rod group enters the welding position of the projection welder. During the process of the lower gear moving towards the storage component along with the moving seat, it prompts the lower gear to contact and mesh with the lower rack again, and the commutation box rotates by 180°, so that the end of the double-rod group supporting the workpiece is commutated from the direction of the projection welder to the direction of the storage component.

[0015] By adopting the above technical solution, through the setting of the steering gear set at the bottom of the reversing box, during the process of the reciprocating lead screw driving the moving seat towards the projection welder, the lower gear connected to the bottom of the reversing box will contact the lower rack on the side of the support plate close to the projection welder. As the moving seat continues to move, the lower gear will rotate by 180° based on its meshing with the lower rack, thereby driving the reversing box at the top to complete the reversing movement, so that the original end of the double rod group in the reversing box facing the storage component faces the projection welder. And as the reciprocating lead screw continues to rotate, the moving seat further drives the reversing box to move towards the welding position of the projection welder, enabling the workpieces taken from the storage component on the double rod group to enter the welding position of the projection welder one by one. The projection welder welds the workpieces entering the welding position one by one, so that the rod sleeve and the inner frame in the workpiece are welded and connected, providing a stable socket support bracket structure for the shock absorber rod. During this period, the residence time of the moving seat carrying the workpiece in the projection welder for each delivery is set according to the number requirement of the actual welding points. As the reciprocating lead screw further rotates, the moving seat carrying the reversing box moves back towards the storage component. During the return journey, the lower gear below the moving seat meshes with the lower rack again, causing the reversing box to rotate 180°, so that the welded workpieces on the double rod group face the storage component and move towards the storage component. Based on the steering gear set, the reversing box automatically completes a 180° reversing adjustment during movement, ensuring seamless connection of the workpiece from material taking to welding. Compared with the existing manual alternating operations of material taking and feeding, the efficiency of this application is higher. Based on the setting of the through-hole damping rotating shaft, during the reversing rotation of the reversing box, the rotational inertia of the reversing box is effectively absorbed, ensuring that the reversing box stays at the end position of rotation.

[0016] Specifically, a transmission gear set for meshing and pushing the double rod group is provided at the top of the reversing box, and an upper opening corresponding to the transmission gear set is opened at the top of the reversing box. The transmission gear set includes two L-shaped brackets, and the two L-shaped brackets are respectively welded and connected to both sides of the upper opening. A driving gear with an axial direction perpendicular to the axial direction of the lower gear is arranged between the two L-shaped brackets. The bottom of the driving gear penetrates through the upper opening and meshes with the internal teeth at the top of the rectangular rod. After the driving gear rotates, one end of the double rod group extends out of the reversing box, and at the same time, the other end of the double rod group is urged to retract into the reversing box;

[0017] A shaft rod is fixedly installed at the center of the driving gear. Both ends of the shaft rod are rotatably connected to the corresponding L-shaped brackets through bearings, and the shaft heads at both ends of the shaft rod penetrate out of the L-shaped brackets. One end shaft head of the shaft rod is rotatably installed with a first side gear that urges one end of the double rod group to retract into the reversing box through a one-way bearing, and the other end shaft head of the shaft rod is rotatably installed with a second side gear that urges one end of the double rod group to extend out of the reversing box through a one-way bearing. A secondary gear is meshed with the top of one side of the first side gear, and the secondary gear is rotatably connected to the corresponding L-shaped bracket through a bearing.

[0018] Specifically, a first upper rack for meshing with the secondary gear and a second upper rack for meshing with the second side gear are installed at the bottom of the top plate. During the process of the reversing box moving towards the storage component along with the moving seat, when the secondary gear meshes with the first upper rack, the secondary gear causes the first side gear to drive the drive gear to reverse, so that one end of the double-rod group retracts into the reversing box, and the workpiece on the double-rod group loses support and drops, realizing automatic blanking. During the process of the reversing box continuing to move towards the storage component, the secondary gear disengages from the first upper rack, and the second side gear contacts and meshes with the second upper rack. The second side gear causes the drive gear to rotate forward, so that one end of the double-rod group extends out of the reversing box and inserts into the storage component.

[0019] By adopting the above technical solution, through the arrangement of the transmission gear set, during the return stroke of the reversing box from the projection welder, the transmission gear set on the top of the reversing box will successively pass by the first upper rack and the second upper rack. After the transmission gear set enters below the first upper rack, the secondary gear continuously rotates during its travel below the first upper rack, causing the first side gear meshing with the secondary gear to drive the drive gear to rotate based on the shaft rod. Based on the meshing of the drive gear with the internal teeth on the rectangular rod in the double-rod group, the rotating drive gear will cause the end of the double-rod group with the workpiece to retract into the reversing box, so that the welded workpiece is successively pushed by the reversing box and falls off from the double-rod group, realizing automatic blanking.

[0020] After the meshing of the secondary gear ends below the first upper rack, the second side gear of the transmission gear set immediately enters below the second upper rack and rotates based on its meshing with the second upper rack. This rotational force causes the shaft rod to drive the drive gear to rotate forward, and the forward-rotating drive gear meshes and pushes the internal teeth, causing the double-rod group retracted into the reversing box to extend out again. Along with the movement of the moving seat, the round rod and the rectangular rod of the double-rod group are respectively inserted into the inner bottom and the top of the workpiece seat sleeve in the storage component, and are inserted into the rod sleeve and the inner frame in the pre-placed workpiece seat sleeve to prepare for taking the material. The transmission gear set enables the double-rod group in the reversing box to automatically blank and pick a new workpiece during the return stroke, seamlessly connecting to the next welding cycle and realizing cyclic continuous operation.

[0021] Specifically, the storage component includes a Z-shaped frame and a workpiece seat sleeve for placing workpieces. A middle plate is welded and connected in the middle of the workpiece seat sleeve. The middle plate divides the inner bottom and inner top of the workpiece seat sleeve into upper and lower cavities for storing rod sleeves and inner frames. The bottom of the Z-shaped frame is fixedly installed on the support frame. A discharge port for discharging the double-rod group is opened at one end of the Z-shaped frame close to the support frame. An electric push rod is vertically installed at the top of the end of the Z-shaped frame far from the support frame. The bottom of the workpiece seat sleeve is installed on the output rod of the electric push rod. One end of the workpiece seat sleeve is open, and the opening of the workpiece seat sleeve is aligned with the through hole and has the same height as the through hole. A proximity switch is installed at the end of the workpiece seat sleeve far from the opening. The detection end of the proximity switch is located inside the workpiece seat sleeve. The output end of the proximity switch is electrically connected to the input end of the electric push rod through a wire. A guide rod is installed at one end of the bottom of the workpiece seat sleeve. The bottom of the guide rod penetrates through the bottom of the Z-shaped frame. The ratio of the inner cavity length of the workpiece seat sleeve to the length of the workpiece is ≥3:1.

[0022] By adopting the above technical solution, through the setting of the storage component, a pre-storage location is provided for the workpieces, so as to cooperate with the commutation and telescopic components to directly obtain new workpieces after discharging in the return stroke. The workpiece seat sleeve of the storage component provides support for the workpieces composed of rod sleeves and inner frames. The rod sleeves are sequentially inserted into the inner bottom of the workpiece seat sleeve, and the inner frames are sequentially placed on the inner top of the workpiece seat sleeve and supported by the middle plate. During this period, the storage of the rod sleeves and inner frames in the workpiece seat sleeve can be completed by the manipulator. After the round rod and rectangular rod of the double-rod group are inserted into the workpiece seat sleeve, the magnet sheet at the bottom of the rectangular rod will magnetically attract the inner bottom of the inner frame. At the same time, the output rod of the electric push rod retracts downward to a certain extent, causing the workpiece seat sleeve to drop to a certain extent, so that the workpiece seat sleeve disengages from the support of the rod sleeve. The rod sleeve is supported by the round rod and leaves the support of the workpiece seat sleeve. At the same time, the inner frame is magnetically attracted by the magnet sheet and leaves the support of the middle plate.

[0023] When the moving seat is driven reciprocally by the reciprocating lead screw and moves away from the storage component again towards the projection welder, after the rod sleeve and the inner frame have successively left the workpiece seat sleeve, the electric push rod pushes the workpiece seat sleeve back to its original position, and the manipulator puts the next set of rod sleeves and inner frames to be welded into the workpiece seat sleeve again, making preparations in advance for the next material taking of the double-rod group. The lengths of the workpiece seat sleeve and the double-rod group are set according to the actual number of workpieces to be supported.

[0024] Advantages of the present invention: The automatic reversing feeding tooling composed of a feeding support, a reversing and telescoping component, a top plate, and a workpiece storage component integrates the four core processes of reversing, feeding, positioning, and blanking into a single tooling. Through mechanical linkage, an unmanned cycle of material picking, turning, welding, and blanking is realized, replacing manual or semi-automatic welding modes, reducing manual intervention links, and reducing operation risks. It provides a highly efficient and reliable welding tooling for the batch production of the shock absorber stabilizer bar brackets of new energy electric vehicles. The tooling forms a mechanical cycle logic of material picking, feeding, blanking, and resetting through the alternating meshing of two groups of side gears driven by a one-way bearing and two groups of upper racks, combined with the reciprocating drive of a servo motor. Among them, the automated mechanical cycle linkage formed by reversing, telescoping, and blanking replaces the manual multi-step operation logic. Through the unique upper and lower double-rod shaped workpiece support structure formed by the double-rod group, simultaneous support for the two components of the rod sleeve and the inner frame required for welding connection in the shock absorber stabilizer bar bracket is completed. The double-rod group ensures the fixed welding position of the rod sleeve and the inner frame through the special-shaped support of the round rod and the rectangular rod, avoiding problems of virtual welding and misalignment caused by manual placement deviation. Moreover, during the feeding process of the projection welder, it is not necessary to feed the two components separately twice. During this period, a sufficiently long workpiece seat sleeve and double-rod group can be set to meet the simultaneous loading and transportation of multiple groups of workpieces. A single reciprocating motion can synchronously load and transport multiple groups of workpieces, reducing the welding pause time and improving the efficiency of the welding operation of the shock absorber stabilizer bar bracket. Through the alternating meshing between the rack and the gear, a closed-loop cyclic drive design is formed in this application, increasing the safety distance of the manual operation from the projection welder, keeping workers away from the welding head of the high-temperature and dangerous projection welder, and improving the safety during the overall welding process of the electric vehicle shock absorber stabilizer bar bracket. Based on the reversing linkage of the lower rack and the lower gear, and the cooperation between the upper rack and the side gear to form blanking and material picking linkages, the core problems of low efficiency and weak safety in the welding of electric vehicle shock absorber brackets are effectively solved, and the problem of easy errors in the operation process caused by the multi-step operation method of manually aligning the workpiece directions one by one and taking and placing the workpieces one by one in the existing welding tooling for electric vehicle shock absorber stabilizer bar brackets is solved. Description of the Drawings

[0025] The present invention will be further described below with reference to the drawings and embodiments.

[0026] Figure 1 It is a schematic diagram of the whole of the present invention;

[0027] Figure 2 It is a schematic diagram of the workpiece entering the welding position of the projection welder of the present invention;

[0028] Figure 3 It is a schematic diagram of the feeding support of the present invention;

[0029] Figure 4 It is a schematic diagram of the back of the reversing box of the present invention;

[0030] Figure 5 Schematic diagram of the double-rod group of the present invention;

[0031] Figure 6 Of the present invention Figure 1 Enlarged schematic diagram at position A in;

[0032] Figure 7 Schematic diagram of the bottom of the top plate of the present invention;

[0033] Figure 8 Schematic diagram of the workpiece processed by the present invention;

[0034] Figure 9 Front view schematic diagram of the workpiece seat sleeve of the present invention;

[0035] Figure 10 Front view screenshot schematic diagram of the workpiece and the double-rod group inserted into the workpiece seat sleeve of the present invention;

[0036] Figure 11 Schematic diagram of the positional relationship between the workpiece seat sleeve and the workpiece and the double-rod group after the workpiece seat sleeve descends of the present invention;

[0037] In the figure: 1. Feeding support; 11. Support frame; 12. Support plate; 13. Linear track; 14. Slide block; 15. Moving seat; 16. Reciprocating lead screw; 18. Servo motor; 19. Synchronous pulley; 2. Reversing and telescoping assembly; 21. Reversing box; 22. Perforation; 23. Double-rod group; 231. Round rod; 232. Rectangular rod; 233. Positioning sleeve; 234. Internal tooth; 24. Upper opening; 25. L-shaped bracket; 26. Driving tooth; 27. Shaft rod; 28. First side gear; 29. Second side gear; 210. Sub-gear; 211. Lower gear; 212. Lower rack; 213. Through-hole damping rotating shaft; 214. Inner shaft sleeve; 215. Flange support; 3. Top plate; 31. First upper rack; 32. Second upper rack; 4. Storage component; 41. Z-shaped frame; 42. Workpiece seat sleeve; 421. Middle plate; 422. Proximity switch; 43. Electric push rod; 44. Guide rod; 5. Projection welder; 6. Workpiece; 61. Rod sleeve; 62. Inner frame. Specific embodiments

[0038] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0039] As an embodiment of the present invention, as Figures 1 to 11As shown in the figure, a welding tooling for the stabilizer bar bracket of an electric vehicle shock absorber according to the present invention includes an automatic reverse feeding tooling disposed on one side of a projection welder 5. The automatic reverse feeding tooling includes a feeding support 1, a reversing and telescoping assembly 2, a top plate 3 that cooperates with the reversing and telescoping assembly 2 to telescope, and a storage component 4 that cooperates with the reversing and telescoping assembly 2 to feed materials. The reversing and telescoping assembly 2 is disposed on the top of the feeding support 1. The top plate 3 is disposed on the top of the reversing and telescoping assembly 2 and is fixedly installed with the frame of the projection welder 5. The storage component 4 is disposed at the feeding end of the feeding support 1, and workpieces 6 are pre-stored in the storage component 4.

[0040] The feeding support 1 includes a support frame 11 installed on one side of the frame of the projection welder 5. The top of the support frame 11 is connected with a support plate 12. Both ends of the top of the support plate 12 are installed with linear tracks 13, and sliders 14 are slidably connected to the top of the linear tracks 13.

[0041] Exemplarily, as Figure 3 shown in the figure, the present invention further includes that a reciprocating lead screw 16 for driving the reversing and telescoping assembly 2 to move between the projection welder 5 and the storage component 4 is disposed on the top of the support plate 12 and between the linear tracks 13. Both ends of the reciprocating lead screw 16 are rotatably connected to the support plate 12 through bearing seats. A moving seat 15 is installed on the top of the slider 14 through bolts. A lead screw sleeve sleeved with the reciprocating lead screw 16 is installed at the bottom of the moving seat 15. A servo motor 18 is installed at the corner of one end of the support plate 12. Synchronous pulleys 19 are installed at the driving end of the servo motor 18 and at the shaft head of one end of the reciprocating lead screw 16, and the synchronous pulleys 19 are connected through a synchronous belt.

[0042] During use, the corresponding synchronous pulley 19 is driven to rotate by the servo motor 18, so that the reciprocating lead screw 16 is driven to rotate through the corresponding synchronous pulley 19, and the moving seat 15 sleeved with the reciprocating lead screw 16 through the lead screw sleeve will reciprocate on the support plate 12, so that the reversing and telescoping assembly 2 reciprocates between the projection welder 5 and the storage component 4, and the workpiece 6 on the reversing and telescoping assembly 2 can be continuously and reciprocally sent from the storage component 4 to the welding position of the projection welder 5 for welding treatment.

[0043] Exemplarily, as Figure 4 、 5 shown in FIGS. 8, the present invention further includes that the reversing and telescoping assembly 2 includes a reversing box 21. The reversing box 21 is disposed on the top of the moving seat 15. A double-rod group 23 for supporting the workpiece 6 is disposed through the reversing box 21. The workpiece 6 includes a rod sleeve 61 and an inner frame 62.

[0044] The double-rod group 23 includes a round rod 231 for inserting and supporting the rod sleeve 61 and a rectangular rod 232 for positioning the inner frame 62. The round rod 231 is located at the bottom of the rectangular rod 232. A positioning sleeve 233 is welded between the middle of the round rod 231 and the rectangular rod 232. Inner teeth 234 are provided at the top of the rectangular rod 232. A magnet sheet 235 is installed on the bottom surface of the rectangular rod 232. Through holes 22 corresponding to the round rod 231 and the rectangular rod 232 are penetrated through both ends of the commutator box 21.

[0045] During use, the round rod 231 of the double-rod group 23 provides sleeve support for the rod sleeve 61, and the rectangular rod 232 of the double-rod group 23 provides a limit for the position of the inner frame 62 on the rod sleeve 61, so that the welding positions of the rod sleeve 61 and the inner frame 62 to be welded and connected are shaped, and the stability of the rod sleeve 61 and the inner frame 62 during the process of entering the welding position of the projection welder 5 is better.

[0046] Exemplarily, as Figure 3 、 4 shown, the present invention further includes that a steering gear group is provided at the bottom of the commutator box 21. The steering gear group includes a lower gear 211 whose axis is vertically perpendicular to the vertical direction of the moving seat 15. The lower gear 211 is located at the bottom of the moving seat 15. An inner shaft sleeve 214 is fixedly installed at the top center of the lower gear 211. A through-hole damping rotating shaft 213 is sleeved on the outer periphery of the bottom of the inner shaft sleeve 214. The bottom and the top of the through-hole damping rotating shaft 213 are respectively installed with the outer bottom of the inner shaft sleeve 214 and the bottom of the moving seat 15. The top of the inner shaft sleeve 214 penetrates to the top of the moving seat 15 and a flange support 215 is installed. The bottom of the flange support 215 is rotationally connected to the top of the moving seat 15 through a bearing, and the mounting holes on the circumference of the flange support 215 are fixedly installed with the bottom of the commutator box 21 through bolts;

[0047] A lower rack 212 is installed on one side of the top of the support plate 12 close to the projection welder 5. One side of the lower gear 211 meshes with the lower rack 212. During the process of the lower gear 211 moving towards the projection welder 5 along with the moving seat 15, the lower gear 211 contacts and meshes with the lower rack 212, prompting the flange support 215 connected to the inner shaft sleeve 214 on the lower gear 211 to drive the commutator box 21 to rotate and reverse by 180°, so that the end of the double-rod group 23 supporting the workpiece 6 is reversed from the direction of the workpiece storage assembly 4 to the direction of the projection welder 5 until the workpiece 6 on the double-rod group 23 enters the welding position of the projection welder 5. During the process of the lower gear 211 moving towards the workpiece storage assembly 4 along with the moving seat 15, it prompts the lower gear 211 to contact and mesh with the lower rack 212 again, and the commutator box 21 makes a 180° rotation, so that the end of the double-rod group 23 supporting the workpiece 6 is reversed from the direction of the projection welder 5 to the direction of the workpiece storage assembly 4.

[0048] During use, when the reciprocating lead screw 16 drives the moving seat 15 to move towards the projection welder 5, the lower gear 211 connected to the bottom of the reversing box 21 will contact the lower rack 212 on the side of the support plate 12 close to the projection welder 5. As the moving seat 15 continues to move, the lower gear 211 will rotate by 180° based on its meshing with the lower rack 212, thereby driving the reversing box 21 at the top to complete the reversing movement. As a result, the end of the double-rod group 23 in the reversing box 21 that originally faced the storage component 4 now faces the projection welder 5. As the reciprocating lead screw 16 continues to rotate, the moving seat 15 further drives the reversing box 21 to move towards the welding position of the projection welder 5, causing the workpieces 6 taken from the storage component 4 on the double-rod group 23 to enter the welding position of the projection welder 5 one by one. The projection welder 5 welds the workpieces 6 that enter the welding position one by one, so that the rod sleeve 61 and the inner frame 62 in the workpiece 6 are welded and connected, providing a stable socket support bracket structure for the shock-absorbing rod. During this period, the residence time of the moving seat 15 carrying the workpiece 6 in the projection welder 5 for individual delivery is set according to the actual number of welding points required. As the reciprocating lead screw 16 rotates further, the moving seat 15 carrying the reversing box 21 moves back towards the storage component 4. During the return journey, the lower gear 211 below the moving seat 15 meshes with the lower rack 212 again, causing the reversing box 21 to rotate 180°, so that the welded workpieces 6 on the double-rod group 23 face the storage component 4 and move towards the storage component 4. Based on the steering gear group, the reversing box 21 automatically completes a 180° reversing adjustment during movement, ensuring seamless connection of the workpiece 6 from material taking to welding. Compared with the existing manual alternating operations of manual material taking and feeding, the efficiency of this application is higher. Based on the setting of the through-hole damping rotating shaft 213, during the reversing rotation of the reversing box 21, the rotational inertia of the reversing box 21 is effectively absorbed, ensuring that the reversing box 21 stays at the end position of rotation.

[0049] Exemplarily, as Figure 1 , 3 , 4, 5, 7 show, the present invention further includes that a transmission gear group for meshing and pushing the double-rod group 23 is provided at the top of the reversing box 21, and an upper opening 24 corresponding to the transmission gear group is opened at the top of the reversing box 21. The transmission gear group includes two L-shaped brackets 25, and the two L-shaped brackets 25 are respectively welded and connected to both sides of the upper opening 24. A driving gear 26 with an axial direction perpendicular to the axial direction of the lower gear 211 is arranged between the two L-shaped brackets 25. The bottom of the driving gear 26 penetrates the upper opening 24 and meshes with the internal teeth 234 at the top of the rectangular rod 232. After the driving gear 26 rotates, one end of the double-rod group 23 extends out of the reversing box 21, and at the same time, the other end of the double-rod group 23 is urged to retract into the reversing box 21;

[0050] A shaft rod 27 is fixedly installed at the center of the circle of the driving gear 26. Both ends of the shaft rod 27 are rotatably connected to the L-shaped brackets 25 at corresponding positions through bearings, and the shaft heads at both ends of the shaft rod 27 penetrate out of the L-shaped brackets 25. A first side gear 28 that causes one end of the double-rod group 23 to retract into the reversing box 21 is rotatably installed at one shaft head of the shaft rod 27 through a one-way bearing. A second side gear 29 that causes one end of the double-rod group 23 to extend out of the reversing box 21 is rotatably installed at the other shaft head of the shaft rod 27 through a one-way bearing. A secondary gear 210 is meshed with the top of one side of the first side gear 28, and the secondary gear 210 is rotatably connected to the L-shaped bracket 25 at the corresponding position through a bearing.

[0051] A first upper rack 31 for meshing with the secondary gear 210 and a second upper rack 32 for meshing with the second side gear 29 are installed at the bottom of the top plate 3. When the reversing box 21 moves towards the storage component 4 along with the moving seat 15, if the secondary gear 210 meshes with the first upper rack 31, the secondary gear 210 causes the first side gear 28 to drive the driving gear 26 to reverse, so that one end of the double-rod group 23 retracts into the reversing box 21, and the workpiece 6 on the double-rod group 23 loses support and drops, realizing automatic blanking. When the reversing box 21 continues to move towards the storage component 4, the secondary gear 210 disengages from the first upper rack 31, and the second side gear 29 comes into contact and meshes with the second upper rack 32. The second side gear 29 causes the driving gear 26 to rotate forward, so that one end of the double-rod group 23 extends out of the reversing box 21 and inserts into the storage component 4.

[0052] During use, when the reversing box 21 returns from the projection welder 5, the transmission gear set on the top of the reversing box 21 will successively pass by the first upper rack 31 and the second upper rack 32. After the transmission gear set enters below the first upper rack 31, the secondary gear 210 continuously rotates during the travel below the first upper rack 31, causing the first side gear 28 meshing with the secondary gear 210 to drive the driving gear 26 to rotate based on the shaft rod 27. Based on the meshing of the driving gear 26 with the internal teeth 234 on the rectangular rod 232 in the double-rod group 23, the rotating driving gear 26 will cause the end of the double-rod group 23 with the workpiece 6 to retract into the reversing box 21, so that the welded workpiece 6 is successively pushed by the reversing box 21 and falls off from the double-rod group 23, realizing automatic blanking.

[0053] After the secondary gear 210 finishes meshing under the first upper rack 31, the second side gear 29 of the transmission gear set immediately enters under the second upper rack 32 and rotates based on the meshing with the second upper rack 32. This rotational force causes the shaft rod 27 to drive the driving gear 26 to rotate forward, and the forward-rotating driving gear 26 meshes with and pushes the internal gear 234, causing the double-rod group 23 retracted in the reversing box 21 to extend again. Along with the movement of the moving seat 15, the round rod 231 and the rectangular rod 232 of the double-rod group 23 are respectively inserted into the inner bottom and the top of the workpiece seat sleeve 42 in the workpiece storage assembly 4, and inserted into the rod sleeve 61 and the inner frame 62 placed in the workpiece seat sleeve 42 in advance to prepare for material taking. The transmission gear set causes the double-rod group 23 in the reversing box 21 to automatically discharge the material and pick up a new workpiece 6 during the return stroke, seamlessly connecting to the next welding cycle and realizing cyclic continuous operation.

[0054] Exemplarily, as Figure 6 , 8 shown in 9, 10, 11, the present invention further includes that the workpiece storage assembly 4 includes a Z-shaped frame 41 and a workpiece seat sleeve 42 for placing the workpiece 6. A middle plate 421 is welded and connected in the middle of the workpiece seat sleeve 42. The middle plate 421 divides the inner bottom and the inner top of the workpiece seat sleeve 42 into upper and lower cavities for storing the rod sleeve 61 and the inner frame 62. The bottom of the Z-shaped frame 41 is fixedly installed on the support frame 11. A discharge port for discharging the double-rod group 23 is opened at one end of the Z-shaped frame 41 close to the support frame 11. An electric push rod 43 is vertically installed at the top of the end of the Z-shaped frame 41 far from the support frame 11. The bottom of the workpiece seat sleeve 42 is installed on the output rod of the electric push rod 43. One end of the workpiece seat sleeve 42 is open, and the opening of the workpiece seat sleeve 42 is aligned with the through hole 22 and has the same height as the through hole 22. A proximity switch 422 is installed at the end of the workpiece seat sleeve 42 far from the opening. The detection end of the proximity switch 422 is located inside the workpiece seat sleeve 42. The output end of the proximity switch 422 is electrically connected to the input end of the electric push rod 43 through a wire. A guide rod 44 is installed at one end of the bottom of the workpiece seat sleeve 42. The bottom of the guide rod 44 penetrates through the bottom of the Z-shaped frame 41. The ratio of the inner cavity length of the workpiece seat sleeve 42 to the length of the workpiece 6 is ≥3:1.

[0055] During use, the storage component 4 provides a pre-stored location for the workpiece 6, enabling the commutation and telescopic component 2 to directly pick up a new workpiece 6 after discharging materials during the return stroke. The workpiece seat sleeve 42 of the storage component 4 supports the workpiece 6 composed of the rod sleeve 61 and the inner frame 62. The rod sleeve 61 is sequentially inserted into the inner bottom of the workpiece seat sleeve 42, and the inner frame 62 is sequentially placed on the inner top of the workpiece seat sleeve 42 and supported by the middle plate 421. During this period, the storage of the rod sleeve 61 and the inner frame 62 in the workpiece seat sleeve 42 can be completed by a manipulator. After the round rod 231 and the rectangular rod 232 of the double-rod group 23 are inserted into the workpiece seat sleeve 42, the magnet sheet 235 at the bottom of the rectangular rod 232 will magnetically attract the inner bottom of the inner frame 62. At the same time, the output rod of the electric push rod 43 retracts downward by a certain amount, causing the workpiece seat sleeve 42 to drop by a certain amount, so that the workpiece seat sleeve 42 disengages from the support of the rod sleeve 61. The rod sleeve 61 is supported by the round rod 231 and leaves the support of the workpiece seat sleeve 42. At the same time, the inner frame 62 is magnetically attracted by the magnet sheet 235 and leaves the support of the middle plate 421.

[0056] When the moving seat 15 is reciprocally driven by the reciprocating lead screw 16 and moves away from the storage component 4 again towards the projection welder 5, after the rod sleeve 61 and the inner frame 62 have successively left the workpiece seat sleeve 42, the electric push rod 43 pushes the workpiece seat sleeve 42 back to its original position, and the manipulator puts the next set of rod sleeve 61 and inner frame 62 to be welded into the workpiece seat sleeve 42 again, making preparations in advance for the next material picking of the double-rod group 23. The lengths of the workpiece seat sleeve 42 and the double-rod group 23 are set according to the actual number of workpieces 6 to be supported.

[0057] During use of the present invention, it is connected to a control host or a PLC controller for the processing site configuration, and the control circuits of the electrical components in this application are connected to the control host or the PLC controller, so that the electrical components in this application work based on the operation logic set by the personnel for the control host or the PLC controller. Before the first operation, the rod sleeve 61 and the inner frame 62 are manually placed into the workpiece seat sleeve 42 first.

[0058] The manipulator for feeding the workpiece seat sleeve 42 is arranged on one side of the storage component 4, and the raw materials of the rod sleeve 61 and the inner frame 62 to be welded and connected are centrally placed in the area that can be grasped by the manipulator.

[0059] During the welding operation, the overall device starts, the servo motor 18 runs, the servo motor 18 drives the corresponding synchronous pulley 19 to rotate, causing the reciprocating lead screw 16 to rotate through the corresponding synchronous pulley 19, so that the moving seat 15 sleeved and connected to the reciprocating lead screw 16 reciprocates on the support plate 12. Thus, the commutation and telescopic assembly 2 reciprocates between the projection welder 5 and the workpiece storage assembly 4. The double-rod group 23 in the commutation and telescopic assembly 2 is inserted into the workpiece seat sleeve 42 first based on this movement. After the double-rod group 23 is completely inserted into the workpiece seat sleeve 42, the proximity switch 422 detects the double-rod group 23 and controls the electric push rod 43 to work. The output rod of the electric push rod 43 retracts downward by a certain amount, causing the workpiece seat sleeve 42 to drop by a certain amount, so that the workpiece seat sleeve 42 disengages from the support of the rod sleeve 61. The rod sleeve 61 is supported by the round rod 231 and leaves the support of the workpiece seat sleeve 42. The inner frame 62 is magnetically attracted by the magnet sheet 235 and leaves the support of the middle plate 421, realizing the picking of the workpiece 6 for picking up materials;

[0060] At the same time, based on the movement of the reciprocating lead screw 16, after the double-rod group 23 is inserted into the workpiece seat sleeve 42, the lead screw sleeve at the bottom of the moving seat 15 has reached the end point of one end of the reciprocating lead screw 16 and starts to move back, causing the moving seat 15 to move towards the projection welder 5. During the movement towards the projection welder 5, the lower gear 211 connected to the bottom of the commutation box 21 will contact the lower rack 212 on the side of the support plate 12 close to the projection welder 5. As the moving seat 15 continues to move, the lower gear 211 will rotate by 180° based on the meshing with the lower rack 212, thereby driving the commutation box 21 at the top to complete the commutation movement. One end of the double-rod group 23 in the commutation box 21 that originally faced the workpiece storage assembly 4 now faces the projection welder 5 due to the commutation. And as the reciprocating lead screw 16 continues to rotate, the workpiece 6 on the double-rod group 23 is delivered to the welding position of the projection welder 5, causing the workpieces 6 picked up from the workpiece storage assembly 4 on the double-rod group 23 to enter the welding position of the projection welder 5 one by one. At this time, the projection welder 5 welds the workpieces 6 entering the welding position one by one, welding the side surface of the rod sleeve 61 and the side surface of the inner frame 62, and the two are fixed;

[0061] As the reciprocating lead screw 16 rotates further, the nut sleeve at the bottom of the moving seat 15 has reached the end point of the other end of the reciprocating lead screw 16, prompting the moving seat 15 to move towards the storage component 4 again. During the movement of the moving seat 15 towards the storage component 4, the lower gear 211 below the moving seat 15 meshes with the lower rack 212 again, causing the reversing box 21 to rotate 180°, thereby reversing the workpiece 6 welded on the double-rod group 23 so that it faces the storage component 4. As the moving seat 15 moves, the transmission gear set on the top of the reversing box 21 will successively pass by the first upper rack 31 and the second upper rack 32. After the transmission gear set enters below the first upper rack 31, the secondary gear 210 of the transmission gear set meshes with the first upper rack 31 and rotates, causing the first side gear 28 meshing with the secondary gear 210 to drive the driving gear 26 to rotate based on the shaft rod 27. Based on the meshing of the driving gear 26 with the internal teeth 234 on the rectangular rod 232 in the double-rod group 23, the rotating driving gear 26 pushes the double-rod group 23 to move away from the storage component 4. At this time, the end of the double-rod group 23 with the workpiece 6 retracts into the reversing box 21. Due to the blocking of the workpiece 6 by the reversing box 21, the welded workpieces 6 fall off the double-rod group 23 in sequence until the meshing of the secondary gear 210 ends below the first upper rack 31, and the workpiece 6 has fallen off completely, realizing automatic blanking. After the meshing of the secondary gear 210 ends below the first upper rack 31, the second side gear 29 of the transmission gear set immediately enters below the second upper rack 32 and rotates based on the meshing with the second upper rack 32. This rotational force causes the shaft rod 27 to drive the driving gear 26 to rotate forward, and the forward-rotating driving gear 26 meshes with and pushes the internal teeth 234, causing the double-rod group 23 retracted into the reversing box 21 to extend again. As the moving seat 15 moves, the round rod 231 and the rectangular rod 232 of the double-rod group 23 are respectively inserted into the inner bottom and the top of the workpiece seat sleeve 42 in the storage component 4, and are inserted into the rod sleeve 61 and the inner frame 62 in the pre-placed workpiece seat sleeve 42 to prepare for re-feeding. This process circulates in sequence, cooperating with the projection welder to continuously weld the workpieces 6 of the electric vehicle shock absorber stabilizer bar brackets. Through the mechanical closed-loop linkage design, the present invention realizes the automation, high efficiency and safety of the welding tooling for the electric vehicle shock absorber stabilizer bar brackets, significantly improves the production efficiency and welding quality, reduces the labor cost and safety risks, and provides an innovative solution for the manufacturing of new energy electric vehicle parts.

[0062] Further, the residence time of each workpiece 6 delivered one by one in the projection welder 5 is realized by the pause interval of the servo motor 18, and the number of pause intervals and the duration of the servo motor 18 are set according to the quantity requirements of the actual welding points.

[0063] Further, when the shift alternation of the equipment supervisors occurs, high-temperature resistant grease is added to the linear track 13 and the reciprocating lead screw 16, and the metal debris between the lower rack 212 and the lower gear 211 is regularly cleaned to avoid meshing jamming.

[0064] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding tooling for the stabilizer bar bracket of an electric vehicle shock absorber, characterized in that It includes a projection welder (5) and an automatic reversing feeding tooling arranged on one side of the projection welder (5). The automatic reversing feeding tooling includes a feeding support (1), a reversing and telescoping assembly (2), a top plate (3) that cooperates with the reversing and telescoping assembly (2) to telescope, and a storage component (4) that cooperates with the reversing and telescoping assembly (2) to feed materials. The reversing and telescoping assembly (2) is arranged on the top of the feeding support (1). The top plate (3) is arranged on the top of the reversing and telescoping assembly (2) and is fixedly installed with the frame of the projection welder (5). The storage component (4) is arranged at the feeding end of the feeding support (1), and workpieces (6) are pre-stored in the storage component (4). The feeding support (1) includes a support frame (11) installed on one side of the frame of the projection welder (5). A support plate (12) is connected to the top of the support frame (11). Linear tracks (13) are installed at both ends of the top of the support plate (12). Sliders (14) are slidably connected to the top of the linear tracks (13).

2. The welding tooling for the stabilizer bar bracket of an electric vehicle shock absorber according to claim 1, wherein A reciprocating lead screw (16) for driving the reversing and telescoping assembly (2) to move between the projection welder (5) and the storage component (4) is arranged on the top of the support plate (12) and between the linear tracks (13). Both ends of the reciprocating lead screw (16) are rotatably connected to the support plate (12) through bearing seats. A moving seat (15) is installed on the top of the slider (14) by bolts. A lead screw sleeve sleeved with the reciprocating lead screw (16) is installed at the bottom of the moving seat (15). A servo motor (18) is installed at the corner of one end of the support plate (12). Synchronous pulleys (19) are installed on the driving end of the servo motor (18) and the shaft head of one end of the reciprocating lead screw (16). The synchronous pulleys (19) are connected by a synchronous belt.

3. The welding tooling for the stabilizer bar bracket of an electric vehicle shock absorber according to claim 2, characterized in that, The reversing and telescoping assembly (2) includes a reversing box (21). The reversing box (21) is arranged on the top of the moving seat (15). A double-rod group (23) for supporting the workpiece (6) is arranged through the reversing box (21). The workpiece (6) includes a rod sleeve (61) and an inner frame (62). The double-rod group (23) includes a round rod (231) for inserting and supporting the rod sleeve (61) and a rectangular rod (232) for positioning the inner frame (62). The round rod (231) is located at the bottom of the rectangular rod (232). A positioning sleeve (233) is welded between the middle parts of the round rod (231) and the rectangular rod (232). Internal teeth (234) are formed at the top of the rectangular rod (232). A magnet sheet (235) is installed on the bottom surface of the rectangular rod (232). Through holes (22) corresponding to the round rod (231) and the rectangular rod (232) are formed through both ends of the reversing box (21).

4. The welding tooling for the stabilizer bar bracket of an electric vehicle shock absorber according to claim 3, characterized in that, A steering gear set is provided at the bottom of the reversing box (21). The steering gear set includes a lower gear (211) whose axis is vertically perpendicular to the vertical direction of the moving seat (15). The lower gear (211) is located at the bottom of the moving seat (15). A central shaft sleeve (214) is fixedly installed at the center of the top of the lower gear (211). A through-hole damping rotating shaft (213) is sleeved on the outer periphery of the bottom of the central shaft sleeve (214). The bottom and top of the through-hole damping rotating shaft (213) are respectively installed with the outer bottom of the central shaft sleeve (214) and the bottom of the moving seat (15). The top of the central shaft sleeve (214) penetrates through to the top of the moving seat (15) and is installed with a flange support (215). The bottom of the flange support (215) is rotationally connected to the top of the moving seat (15) through a bearing, and the mounting holes on the circumference of the flange support (215) are fixedly installed with the bottom of the reversing box (21) through bolts. A lower rack (212) is installed on one side of the top of the support plate (12) close to the projection welder (5). One side of the lower gear (211) meshes with the lower rack (212). Each time the lower gear (211) completes meshing with the lower rack (212), the reversing box (21) makes a 180° turn.

5. The welding tooling for the stabilizer bar bracket of an electric vehicle shock absorber according to claim 4, wherein, A transmission gear set for meshing and pushing the double-rod group (23) is provided at the top of the reversing box (21). An upper opening (24) corresponding to the transmission gear set is opened at the top of the reversing box (21). The transmission gear set includes two L-shaped brackets (25). The two L-shaped brackets (25) are respectively welded to both sides of the upper opening (24). A driving gear (26) whose axis is perpendicular to the axis of the lower gear (211) is arranged between the two L-shaped brackets (25). The bottom of the driving gear (26) penetrates through the upper opening (24) and meshes with the internal teeth (234) at the top of the rectangular rod (232). After the driving gear (26) rotates, one end of the double-rod group (23) extends out of the reversing box (21), and at the same time, the other end of the double-rod group (23) retracts into the reversing box (21). A shaft rod (27) is fixedly installed at the center of the driving gear (26). Both ends of the shaft rod (27) are rotationally connected to the corresponding L-shaped brackets (25) through bearings, and the shaft heads at both ends of the shaft rod (27) penetrate out of the L-shaped brackets (25). A first side gear (28) that causes one end of the double-rod group (23) to retract into the reversing box (21) is rotationally installed at one shaft head of the shaft rod (27) through a one-way bearing. A second side gear (29) that causes one end of the double-rod group (23) to extend out of the reversing box (21) is rotationally installed at the other shaft head of the shaft rod (27) through a one-way bearing. One side of the top of the first side gear (28) meshes with a secondary gear (210). The secondary gear (210) is rotationally connected to the corresponding L-shaped bracket (25) through a bearing.

6. The welding tooling for the stabilizer bar bracket of an electric vehicle shock absorber according to claim 5, characterized in that, A first upper rack (31) for meshing with the secondary gear (210) and a second upper rack (32) for meshing with the second side gear (29) are installed at the bottom of the top plate (3).

7. The welding tooling for the stabilizer bar bracket of an electric vehicle shock absorber according to claim 6, characterized in that, The storage component (4) includes a Z-shaped frame (41) and a workpiece seat sleeve (42) for placing a workpiece (6). A middle plate (421) is welded and connected in the middle of the workpiece seat sleeve (42). The middle plate (421) divides the inner bottom and inner top of the workpiece seat sleeve (42) into upper and lower cavities for storing a rod sleeve (61) and an inner frame (62). The bottom of the Z-shaped frame (41) is fixedly installed on the support frame (11). A discharge port for discharging the double-rod group (23) is formed at one end of the Z-shaped frame (41) close to the support frame (11). An electric push rod (43) is vertically installed at the top of the end of the Z-shaped frame (41) far from the support frame (11). The bottom of the workpiece seat sleeve (42) is installed on the output rod of the electric push rod (43). One end of the workpiece seat sleeve (42) is open, and the opening of the workpiece seat sleeve (42) is aligned with the through hole (22) and has the same height as the through hole (22). A proximity switch (422) is installed at the end of the workpiece seat sleeve (42) far from the opening. The detection end of the proximity switch (422) is located inside the workpiece seat sleeve (42). The output end of the proximity switch (422) is electrically connected to the input end of the electric push rod (43) through a wire. A guide rod (44) is installed at one end of the bottom of the workpiece seat sleeve (42). The bottom of the guide rod (44) penetrates through the bottom of the Z-shaped frame (41). The ratio of the inner cavity length of the workpiece seat sleeve (42) to the length of the workpiece (6) is ≥3:1.

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