A multi-station flipping and positioning fixture for automotive parts

Abstract

This utility model relates to the field of automotive parts processing technology, specifically a multi-station flipping and positioning fixture for automotive parts. It includes an operating unit and a guide rail. The operating unit comprises a traction device, first and second position adjustment devices, a clamping device, and an auxiliary limiting frame. The traction device drives the operating unit to move along the guide rail via a traction motor. The first position adjustment device adjusts the height, horizontal orientation, and horizontal position of the headrest rod through a lifting push rod, a first rotary motor, and a lead screw motor. The second position adjustment device drives the push frame to flip via a second rotary motor and adjusts the position of the auxiliary limiting frame via a third rotary motor, cooperating with the clamping device to clamp and fix the headrest rod. The auxiliary limiting frame clamps the vertical section of the headrest rod through a shape-fitting groove to prevent workpiece movement during tooth cutting. This fixture enables continuous processing of multiple processes such as headrest rod bending and tooth cutting, effectively reducing clamping errors and improving processing accuracy and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing technology, specifically to a multi-station flipping and positioning fixture for automotive parts. Background Technology

[0002] The headrest rod, also known as the headrest tube, is a crucial support component of the car seat headrest. It is typically formed by cutting and chamfering a tubular component, followed by bending and toothing processes. In existing technologies, each processing step of the headrest rod is usually completed by separate equipment, requiring the workpiece to be re-clamped and positioned between each step. For example, Chinese utility model patent CN210360037U discloses a headrest support rod welding fixture, including a fixing frame, a placement component, a pushing component, and a clamping component, capable of positioning and clamping the support rod to ensure its position remains unchanged during welding. However, the fixture disclosed in this patent document has a relatively limited function, only suitable for fixed positioning during the welding process. It cannot achieve automatic transfer and posture adjustment of the workpiece between different processing stations. The workpiece still needs to be repeatedly clamped between multiple processes such as bending and toothing, and each re-clamping introduces positioning errors. This makes it difficult to consistently guarantee the bending angle and adjustment groove position accuracy of the headrest rod, significantly limiting processing efficiency.

[0003] In view of this, the present invention aims to provide a multi-station flipping and positioning fixture for automotive parts. The operating unit is driven to move along the guide rail between various processing stations by a traction device. The spatial posture of the headrest rod is flexibly changed by a multi-level position adjustment device and a flipping mechanism. The auxiliary limit frame provides rigid limit support in the gear hobbing process, thereby completing multiple processing steps such as bending and gear hobbing of the headrest rod under a single clamping condition, reducing clamping errors and ensuring processing accuracy. Utility Model Content

[0004] This utility model provides the following technical solution: a multi-station flipping and positioning fixture for automotive parts, including an operating unit and a guide rail. The operating unit includes a second position adjustment device, a traction device, a clamping device and an auxiliary limit frame. The traction device is used to traction the operating unit along the guide rail via a traction motor. The second position adjustment device includes a second movable seat mounted on the traction device, and a second rotary motor and a controller are fixedly mounted on the second movable seat. The output end of the second rotary motor drives a push frame, and a third rotary motor and a first clamping push rod are fixedly mounted on the push frame. The first clamping push rod is used to drive the clamping device to clamp the headrest rod. The auxiliary limiting frame includes a limiting arm, and the limiting arm has a shaped fitting groove for clamping the headrest rod. The output end of the third rotary motor drives a swing arm, and a second clamping push rod is fixedly installed on the swing arm. The output end of the second clamping push rod is used to drive the limiting arm to clamp the headrest rod. The controller is electrically connected to the traction motor, the second rotary motor, the first clamping push rod, the third rotary motor, and the second clamping push rod.

[0005] Optionally, the guide rail is arranged in an arc shape and the cross-section of the guide rail is T-shaped. A rack is provided on the top of the guide rail. The traction device includes a first movable seat that is slidably installed on the guide rail, and a traction motor is fixedly installed on the first movable seat. The output end of the traction motor drives a drive wheel that meshes with the rack.

[0006] Optionally, a first position adjustment device is provided between the second position adjustment device and the traction device. The first position adjustment device includes a lifting push rod that is vertically fixed on the first movable seat. The lifting push rod is used to adjust the height of the headrest rod. The output end of the lifting push rod drives a first rotary motor. The first rotary motor is used to adjust the horizontal orientation of the headrest rod. The output end of the first rotary motor drives a guide seat. A lead screw motor is fixedly installed on the guide seat. The output end of the lead screw motor drives the second movable seat to slide along the guide seat through the lead screw, thereby adjusting the horizontal position of the headrest rod. The lifting push rod is an electric push rod, and the controller is electrically connected to the lifting push rod, the first rotary motor, and the lead screw motor respectively.

[0007] Optionally, a worm gear reducer is fixedly installed on the second movable seat, the output end of the second rotary motor is connected to the input end of the worm gear reducer, and the output end of the worm gear reducer is used to drive the push frame to rotate.

[0008] Optionally, the limiting arm is provided with a limiting hole for an external vertical limiting rod to be inserted, so as to restrict the horizontal movement of the limiting arm and clamp the vertical rod section of the headrest rod, thereby preventing the vertical rod section from moving during the insertion process.

[0009] Optionally, the clamping device includes a fixed clamp and a movable clamp for jointly clamping the middle part of the headrest bar. The fixed clamp is mounted on the push frame, and the movable clamp is mounted on the output end of the first clamping push rod. The fixed clamp is equipped with a first positioning insert rod that is inserted into the center positioning hole of the headrest bar.

[0010] Optionally, the movable caliper has a first positioning hole, and the upper end of the push frame has a second positioning hole, and a second positioning rod is fixedly installed on the limiting arm. The first positioning hole and the second positioning hole are used to limit the rotational movement of the limiting arm by inserting with the second positioning rod.

[0011] Compared with the prior art, the beneficial effects of this utility model of a multi-station flipping and positioning fixture for automotive parts are: 1. By engaging the first positioning rod in the clamping device with the center positioning hole of the headrest rod, the rotation of the headrest rod is limited, thereby effectively preventing the workpiece from rotating and reducing bending angle error during the pipe bending process; 2. By using the shape of the auxiliary limiting frame to fit the slot and clamp the vertical section of the headrest rod, and by using the insertion and engagement of the limiting hole with the vertical limiting rod of the gear hobbing machine, a rigid constraint on the vertical section is achieved during gear hobbing, thereby achieving the effect of accurately machining the adjustment groove and ensuring the accuracy of the groove position; 3. The traction device drives the operating unit to pass through multiple processing stations along the guide rail in sequence. With the cooperation of the first position adjustment device and the second position adjustment device, the height, horizontal orientation and flipping posture of the headrest rod are automatically adjusted, so as to achieve the effect of completing multiple continuous processing in a single clamping, reducing the number of clamping times and positioning errors, and improving production efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the operating unit in this utility model; Figure 3 This is a side view of the structure of the operating unit in this utility model; Figure 4 This is a schematic diagram showing the auxiliary limiting frame of the operating unit in the raised position in this utility model; Figure 5 This is a schematic diagram showing the installation of the auxiliary limiting frame and swing arm of the operating unit in this utility model; Figure 6 This is a schematic diagram of the auxiliary limiting frame of the operating unit in this utility model; Figure 7 This is a schematic diagram showing the installation of the traction device and the first position adjustment device of the operating unit in this utility model; Figure 8 This is a schematic diagram showing the installation of the second position adjustment device and clamping device of the operating unit in this utility model; Figure 9 This is a schematic diagram of the headrest rod in this utility model.

[0013] In the diagram: 1. Operating unit; 2. Headrest rod; 201. Center positioning hole; 202. Middle section; 203. First bent section; 204. Second bent section; 205. Vertical rod section; 206. Adjustment groove; 3. Second position adjustment device; 301. Second moving seat; 302. Worm gear reducer; 303. Second rotary motor; 304. Third rotary motor; 305. Push frame; 306. First clamping push rod; 4. Traction device; 401. Traction motor; 402. Drive wheel; 403. First moving seat; 5. Clamping device; 501. Fixed caliper; 502. Moving caliper; 6. Auxiliary limit frame; 601. Limiting arm; 602. Shape matching groove; 603. Limiting hole; 7. Second clamping push rod; 8. Swing arm; 9. First position adjustment device; 901. Lifting push rod; 902. First rotary motor; 903. Guide seat; 904. Screw motor; 10. Controller; 11. Second positioning hole; 12. First positioning insert rod; 13. First positioning hole; 14. Second positioning insert rod; 15. Guide rail; 16. Rack. Detailed Implementation

[0014] To clearly and completely describe the objectives and technical solutions of this utility model, and to more clearly illustrate its advantages, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] Example 1: Please refer to Figures 1 to 8 This utility model provides a multi-station flipping and positioning fixture for automotive parts, including an operating unit 1 and a guide rail 15. The operating unit 1 includes a second position adjustment device 3, a traction device 4, a clamping device 5, and an auxiliary limiting frame 6. The traction device 4 is used to pull the operating unit 1 along the guide rail 15 via a traction motor 401. A first pipe bending machine, a second pipe bending machine, and a gear shaping machine are sequentially placed on the outer side of the guide rail 15 along the moving direction of the operating unit 1. Under the guidance of the traction device 4, the operating unit 1 will stop sequentially at the corresponding stations of the first pipe bending machine, the second pipe bending machine, and the gear shaping machine, and drive the headrest rod 2 to perform corresponding pipe bending or gear shaping processing.

[0016] Please see Figure 9As shown in the figure, the headrest rod 2 used in this solution includes a middle section 202. The two sides of the middle section 202 are processed into first bent sections 203 by a first pipe bending machine. The end of the first bent section 203 is processed into a second bent section 204 by a second pipe bending machine. The end of the second bent section 204 forms a vertical rod section 205 for insertion into an outer sleeve. An adjustment groove 206 for adjusting the lifting height of the headrest rod 2 is processed on the vertical rod section 205 by a gear shaping machine. During processing, the headrest rod 2 is cut into a long tube of a specified length by external equipment. Then, a drilling machine drills a center positioning hole 201 in the center of the headrest rod 2 in advance. Then, a chamfering machine is used to chamfer the end of the headrest rod 2. The chamfered headrest rod 2 is then installed on the operating unit 1. The operating unit 1 then carries the headrest rod 2 and passes it through the first pipe bending machine, the second pipe bending machine, and the gear shaping machine in sequence to complete the processing of the first bent section 203, the second bent section 204, and the adjustment groove 206.

[0017] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 8 The second position adjustment device 3 includes a second movable seat 301 mounted on the traction device 4, and a second rotary motor 303 and a controller 10 are fixedly mounted on the second movable seat 301. The output end of the second rotary motor 303 drives a push frame 305, and a third rotary motor 304 and a first clamping push rod 306 are fixedly mounted on the push frame 305. The first clamping push rod 306 is used to drive the clamping device 5 to clamp the headrest rod 2.

[0018] Please see Figure 2 , Figure 3 , Figure 4 , Figure 8 and Figure 9The clamping device 5 includes a fixed clamp 501 and a movable clamp 502 for jointly clamping the middle part of the headrest rod 2. The fixed clamp 501 is mounted on the push frame 305, and the movable clamp 502 is mounted on the output end of the first clamping push rod 306. The fixed clamp 501 is equipped with a first positioning rod 12 that inserts into the center positioning hole 201 of the headrest rod 2. When the operator places the headrest rod 2 between the fixed clamp 501 and the movable clamp 502, and aligns the center positioning hole 201 with the first positioning rod 12, the movable clamp 502 moves towards the fixed clamp 501 under the drive of the first clamping push rod 306, causing the first positioning rod 12 to insert into the center positioning hole 201. At this time, the rotation of the headrest rod 2 can be restricted by the first positioning rod 12, thereby avoiding machining errors caused by the rotation of the headrest rod 2 in subsequent machining processes. The movable caliper 502 has a first positioning hole 13, and the upper end of the push frame 305 has a second positioning hole 11. A second positioning rod 14 is fixedly installed on the limiting arm 601. The first positioning hole 13 and the second positioning hole 11 are used to limit the rotational movement of the limiting arm 601 by interlocking with the second positioning rod 14. When the auxiliary limiting frame 6 is in the raised position, the second positioning rod 14 will be inserted into the second positioning hole 11 to prevent the auxiliary limiting frame 6 from falling. When the auxiliary limiting frame 6 is in the working position and correctly clamps the headrest rod 2, the second positioning rod 14 will be inserted into the first positioning hole 13. The interlocking action of the first positioning hole 13 and the second positioning rod 14 can prevent the auxiliary limiting frame 6 from shaking, thus further ensuring positioning accuracy and structural rigidity.

[0019] Please see Figure 1 The guide rail 15 is arranged in an arc shape, and its cross-section is T-shaped. A rack 16 is provided on the top of the guide rail 15. The traction device 4 includes a first movable seat 403 slidably mounted on the guide rail 15, and a traction motor 401 is fixedly mounted on the first movable seat 403. The output end of the traction motor 401 drives a drive wheel 402 that meshes with the rack 16. The first pipe bending machine, the second pipe bending machine, and the gear shaping machine are arranged in a fan shape in the processing area outside the guide rail 15. The traction device 4 will drive the operating unit 1 to pass through the working areas of the first pipe bending machine, the second pipe bending machine, and the gear shaping machine in sequence. The traction motor 401 is a stepper motor, which can precisely control the position of the operating unit 1.

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7A first position adjustment device 9 is provided between the second position adjustment device 3 and the traction device 4. The first position adjustment device 9 includes a lifting push rod 901 that is vertically fixed on the first moving seat 403. The lifting push rod 901 is used to adjust the height of the headrest rod 2. The output end of the lifting push rod 901 drives a first rotary motor 902. The first rotary motor 902 is used to adjust the horizontal orientation of the headrest rod 2. The output end of the first rotary motor 902 drives a guide seat 903. A lead screw motor 904 is fixedly installed on the guide seat 903. The output end of the lead screw motor 904 drives the second moving seat 301 to slide along the guide seat 903 through the lead screw, thereby adjusting the horizontal position of the headrest rod 2. The lifting push rod 901 is an electric push rod, and the controller 10 is electrically connected to the lifting push rod 901, the first rotary motor 902 and the lead screw motor 904 respectively.

[0021] Please see Figures 1 to 6 The auxiliary limiting frame 6 includes a limiting arm 601, and the limiting arm 601 has a shaped fitting groove 602 for clamping the headrest rod 2. The output end of the third rotary motor 304 drives a swing arm 8, and a second clamping push rod 7 is fixedly installed on the swing arm 8. The output end of the second clamping push rod 7 is used to drive the limiting arm 601 to clamp the headrest rod 2. The limiting arm 601 has a limiting hole 603. A vertical limiting rod preset on the external gear hobbing machine workbench can be inserted into the limiting hole 603, thereby limiting the horizontal movement of the limiting arm 601 and clamping the vertical rod section 205 of the headrest rod 2, thereby preventing the vertical rod section 205 from moving during gear hobbing. The controller 10 is electrically connected to the traction motor 401, the second rotary motor 303, the first clamping push rod 306, the third rotary motor 304, and the second clamping push rod 7. The traction motor 401, the first rotary motor 902, the second rotary motor 303, and the third rotary motor 304 are all stepper motors. Both the first clamping push rod 306 and the second clamping push rod 7 are ball screw type electric push rods. The controller 10 is a PLC controller.

[0022] Working Principle: The flipping positioning fixture provided in this embodiment is used to complete the processing of the headrest rod 2. First, the guide rail 15 is laid on the ground. Then, the working area, loading area, and unloading area are marked on the outside of the guide rail 15. The first pipe bending machine, the second pipe bending machine, and the gear shaping machine are placed in the working area in a clockwise direction. Then, at least one operating unit 1 is installed on the guide rail 15 as needed. Then, the blank of the headrest rod 2 is processed by external equipment. First, a pipe of appropriate diameter is selected and cut into a pipe of a specified length by a cutting machine. Then, the ends of these pipes are chamfered. Finally, a center positioning hole 201 is accurately drilled at the critical middle position by a drilling machine to form the blank of the headrest rod 2. The operator then clamps the billets in the loading area between the fixed clamp 501 and the movable clamp 502, ensuring that the first positioning rod 12 can be correctly inserted into the center positioning hole 201. Subsequently, under the control of the controller 10, the operating unit 1 transfers the billets to the station corresponding to the first pipe bending machine and adjusts the height of the billet end using the lifting push rod 901, allowing the first pipe bending machine to correctly clamp the left end of the billet. Since the left end of the billet is clamped by the pipe bending machine, while the middle of the billet is fixed by the clamping device 5, the left side of the billet is completely fixed. At this point, the first pipe bending machine can be used to... The first bending segment 203 is formed by side bending. Then, the first pipe bending machine releases the left side of the billet, and the lifting push rod 901 lifts the billet. Then, the right side of the billet is flipped to the left side by the second rotary motor 303. The right side of the billet is then sent to the correct position of the first pipe bending machine by the lifting push rod 901. At this time, the first pipe bending machine clamps the right side of the billet and then bends the first bending segment 203 on the right side of the billet. After bending is completed, the first pipe bending machine releases the right side of the billet again. At this time, the lifting push rod 901 lifts the billet to the preset height again. Then, under the drive of the traction device 4, the billet is transported to the position corresponding to the second pipe bending machine. Subsequently, the second rotary motor 303 adjusts the position of the billet, so that both ends of the billet are changed from horizontal to vertical. Specifically, the first bending section 203 on the left side of the billet is above the first bending section 203 on the right side of the billet. Then, the first rotary motor 902 drives the billet to rotate 90° clockwise horizontally. Then, the lead screw motor 904 transports the billet to the top of the second pipe bending machine. Then, the lifting push rod 901 lowers the billet to the working position of the second pipe bending machine. At this time, the second pipe bending machine can simultaneously bend the second bending section 204 on both sides of the billet. After the bending process is completed, the lifting push rod 901 is raised again, and then the two sides of the billet are rotated back to a horizontal state by the second rotary motor 303. Then, the operating unit 1 drives the billet to the processing position corresponding to the gear shaping machine.Then, the second clamping push rod 7 pushes the auxiliary limiting frame 6 outward to its limit position, causing the second positioning rod 14 to disengage from the second positioning hole 11. The third rotary motor 304 then pushes the auxiliary limiting frame 6 to the position corresponding to the blank. The second clamping push rod 7 then retracts the auxiliary limiting frame 6 inward, so that both sides of the blank are completely engaged in the shape fitting groove 602. Simultaneously, the second positioning rod 14 is inserted into the first positioning hole 13. Then, the lifting push rod 901 moves the blank downward, allowing the vertical limiting rod pre-installed on the gear shaping machine to be inserted into the right limiting arm. Within the limiting hole 603 of 601, the gear shaper then processes the adjusting groove 206 on the right vertical rod section 205 of the blank. After processing, the lifting push rod 901 lifts the blank again and rotates it 180° via the second rotary motor 303. The blank is then lowered so that the vertical limiting rod can be inserted into the limiting hole 603 on another limiting arm 601. The gear shaper then processes the adjusting groove 206 on another vertical rod section 205. After processing, the lifting push rod 901 rises again, and the completed headrest rod 2 is transported to the unloading area via the operating unit 1. In the unloading area, the operator removes the headrest rod 2 from the clamping device 5. Using this equipment to process the headrest rod 2 ensures that the headrest rod 2 is always completely fixed by the clamping device 5 during the processing, without the need for repeated clamping, thus effectively reducing clamping errors. Furthermore, during the bending process of the headrest rod 2, the rotation of the headrest rod 2 blank can be restricted by the first positioning rod 12, thereby reducing bending processing errors. During the gear shaping process, the movement of the vertical rod segment 205 can be completely restricted by the auxiliary limiting frame 6 in conjunction with the vertical limiting rod, thus enabling the precise processing of the adjustment groove 206 and effectively ensuring processing accuracy.

[0023] Example 2: Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 8 Based on Embodiment 1, a worm gear reducer 302 is fixedly installed on the second movable seat 301. The output end of the second rotary motor 303 is connected to the input end of the worm gear reducer 302, and the output end of the worm gear reducer 302 is used to drive the push frame 305 to rotate. By installing the worm gear reducer 302, on the one hand, the second rotary motor 303 is reduced in speed, thereby improving control accuracy; on the other hand, the self-locking function provided by the worm gear reducer 302 is used to avoid reverse power input caused by the push frame 305, which would lead to inaccurate position control. Therefore, it can effectively improve the control accuracy of the second rotary motor 303 on the position of the headrest rod 2.

[0024] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, any variations that fall within the spirit and scope of this application as defined by the appended claims are within the protection scope of this application.

Claims

1. A multi-station flipping and positioning fixture for automotive parts, characterized in that: It includes an operating unit (1) and a guide rail (15). The operating unit (1) includes a second position adjustment device (3), a traction device (4), a clamping device (5) and an auxiliary limiting frame (6). The traction device (4) is used to traction the operating unit (1) along the guide rail (15) by means of a traction motor (401). The second position adjustment device (3) includes a second movable seat (301) mounted on the traction device (4), and a second rotary motor (303) and a controller (10) are fixedly mounted on the second movable seat (301). The output end of the second rotary motor (303) drives a push frame (305), and a third rotary motor (304) and a first clamping push rod (306) are fixedly mounted on the push frame (305). The first clamping push rod (306) is used to drive the clamping device (5) to clamp the headrest rod (2). The auxiliary limiting frame (6) includes a limiting arm (601), and the limiting arm (601) has a shape matching groove (602) for clamping the headrest rod (2). The output end of the third rotary motor (304) drives a swing arm (8), and a second clamping push rod (7) is fixedly installed on the swing arm (8). The output end of the second clamping push rod (7) is used to drive the limiting arm (601) to clamp the headrest rod (2). The controller (10) is electrically connected to the traction motor (401), the second rotary motor (303), the first clamping push rod (306), the third rotary motor (304), and the second clamping push rod (7).

2. The multi-station turnover positioning tool for automobile parts of claim 1, characterized in that: The guide rail (15) is arranged in an arc shape and the cross-section of the guide rail (15) is T-shaped. A rack (16) is provided on the top of the guide rail (15). The traction device (4) includes a first movable seat (403) that is slidably installed on the guide rail (15), and a traction motor (401) is fixedly installed on the first movable seat (403). The output end of the traction motor (401) drives a drive wheel (402) that meshes with the rack (16).

3. The multi-station turnover positioning tool for an automobile part of claim 2, wherein: A first position adjustment device (9) is provided between the second position adjustment device (3) and the traction device (4). The first position adjustment device (9) includes a lifting push rod (901) vertically fixed on the first movable seat (403), and the lifting push rod (901) is used to adjust the height of the headrest rod (2). The output end of the lifting push rod (901) drives a first rotary motor (902), and the first rotary motor (902) is used to adjust the horizontal orientation of the headrest rod (2). The output end of the rotary motor (902) drives the guide seat (903), and the guide seat (903) is fixedly mounted with the lead screw motor (904). The output end of the lead screw motor (904) drives the second moving seat (301) to slide along the guide seat (903) through the lead screw, thereby adjusting the horizontal position of the headrest rod (2). The lifting push rod (901) is an electric push rod, and the controller (10) is electrically connected to the lifting push rod (901), the first rotary motor (902) and the lead screw motor (904) respectively.

4. The multi-station turnover positioning tool for an automobile part of claim 1, wherein: A worm gear reducer (302) is fixedly installed on the second movable seat (301). The output end of the second rotary motor (303) is connected to the input end of the worm gear reducer (302), and the output end of the worm gear reducer (302) is used to drive the push frame (305) to rotate.

5. The multi-station turnover positioning tool for an automobile part of claim 1, wherein: The limiting arm (601) has a limiting hole (603) for inserting an external vertical limiting rod to restrict the horizontal movement of the limiting arm (601) and clamp the vertical rod section (205) of the headrest rod (2), thereby preventing the vertical rod section (205) from moving during the insertion process.

6. The multi-station turnover positioning tool for an automobile part of claim 1, wherein: The clamping device (5) includes a fixed clamp (501) and a movable clamp (502) for clamping the middle part of the headrest rod (2). The fixed clamp (501) is mounted on the push frame (305), and the movable clamp (502) is mounted on the output end of the first clamping push rod (306). The fixed clamp (501) is equipped with a first positioning rod (12) that is inserted into the center positioning hole (201) of the headrest rod (2).

7. The multi-station turnover positioning tool for an automobile part of claim 6, wherein: The movable caliper (502) has a first positioning hole (13), and the upper end of the push frame (305) has a second positioning hole (11). The limiting arm (601) is fixedly installed with a second positioning rod (14). The first positioning hole (13) and the second positioning hole (11) are used to limit the rotational movement of the limiting arm (601) by inserting it with the second positioning rod (14) when the auxiliary limiting frame (6) rotates to the corresponding position.

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