Positioning auxiliary device for nut spot welding machining operation

Abstract

The invention discloses a positioning auxiliary device for nut spot welding machining operation, relates to the technical field of spot welding machining, and aims to solve the problems that the positioning requirements of special-shaped or different-thickness plate workpieces cannot be met in the nut spot welding operation process, and the dynamic compensation function for workpiece displacement in the welding process is not achieved. On one hand, transverse movement of the nut workpiece to be welded can be completed in an active regulation and control mode, progressive movement of the nut workpiece to be welded is formed through the displacement assembly, and therefore continuous displacement spot welding operation is completed in the nut spot welding process; on the other hand, the nut workpiece to be welded is supported through the bearing assembly with the adjustable distance; and the position of the nut workpiece to be welded in the welding action period is adjusted by the intelligent positioning module, so that the nut workpiece to be welded and the electrode rod are matched and positioned, accurate welding alignment aiming at excessive feeding and feeding difference limit is achieved, and intelligent regulation and control of nut spot welding operation are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of spot welding processing, and in particular to a positioning auxiliary device used for nut spot welding processing operations. Background Art

[0002] In the fields of automobile manufacturing and hardware processing, the resistance spot welding process of nuts and workpieces is widely used. In the prior art, nut spot welding equipment (such as patent publication number CN203064677U4) usually realizes the precise positioning and transportation of nuts through vibration plates and feeding tracks, while the positioning of workpieces (such as metal sheets) relies on manual operation. For example, the operator needs to manually place the workpiece on the surface of the lower electrode and adjust the contact position between the workpiece and the nut. This method has the following technical defects; 1. Low positioning accuracy: manual gripping of the workpiece is prone to offset or shaking, resulting in deviation of the nut welding position and affecting the product qualification rate; 2. Safety hazards: the operator needs to be in close contact with the electrodes and moving parts, and there is a risk of mechanical pinching or arc burns; Existing improvement schemes mostly focus on optimizing nut conveying. Although some equipment introduces a simple clamping structure (such as patent publication number CN113245683A), its application scope is narrow and it cannot adapt to the positioning requirements of special-shaped workpieces or plates of different thicknesses. In addition, the traditional clamping device lacks real-time detection function and cannot dynamically compensate for the displacement of the workpiece during welding, which can easily lead to false welding or insufficient strength of the weld. For this purpose, this application proposes a solution. Summary of the invention

[0003] The purpose of the present invention is to provide a positioning auxiliary device for nut spot welding operations, which is used to solve the problems that the existing nut spot welding process cannot adapt to the positioning requirements of special-shaped or different thickness plate workpieces and does not have the dynamic compensation function for workpiece displacement during welding.

[0004] The objective of the present invention can be achieved through the following technical scheme: a positioning auxiliary device for nut spot welding processing, comprising a base plate, a control panel embedded on the base plate, a front feed box and a rear feed box symmetrically arranged above the base plate, a displacement assembly arranged in the front feed box and the rear feed box, the displacement assembly comprising a rotatably arranged displacement bracket, an initial state of a pair of the displacement brackets being horizontally arranged in the front feed box and the rear feed box respectively, a pair of the displacement brackets being used together for position adjustment of workpieces to be welded; a welding table is arranged between the front feed box and the rear feed box, electrode rods are evenly distributed on the welding table; a guide screw is installed together in the middle of the front feed box and the rear feed box, the guide screws respectively correspond to the thread directions of the front feed box and the rear feed box in opposite directions, and when the guide screws rotate, they drive the front feed box and the rear feed box to be closer or farther away.

[0005] It is further configured as follows: a drive-change assembly is installed below the substrate corresponding to the front feed box and the rear feed box, the drive-change assembly includes a steering seat, a motor 1 is installed on the inner side of the steering seat, the output end of the motor 1 is connected to a swing rod, and a fixed rod connected to the bottom of the front feed box and the rear feed box respectively is rotatably installed on the upper end of the swing rod.

[0006] It is further configured as follows: a guide hole is opened on the steering seat, a guide rod is installed on the steering seat through the guide hole, a second motor is installed on the inner side of the guide rod, and a driving tooth and a transmission rod connected to a displacement bracket are continuously installed on the output end of the second motor.

[0007] It is further configured as follows: connecting rod seats are installed at both ends of the front feed box and the rear feed box, support rods are commonly penetrated by the connecting rod seats on the same side, and side connecting rods connected to the base plate are installed at both ends of the support rods.

[0008] It is further configured as follows: a motor three is installed at one end of the guide screw rod, and a middle connecting rod connected to the base plate is installed at the lower end of the motor three.

[0009] It is further configured as follows: the longitudinal rods of the side connecting rod and the middle connecting rod are arranged parallel to the swing rod, and the single rod lengths of the side connecting rod, the middle connecting rod and the swing rod are the same.

[0010] It is further configured as follows: a receiving plate is installed at the end of each of the front feed box and the rear feed box, and a guide block is installed at the outer side of the receiving plate close to the second motor.

[0011] It is further configured as follows: a spur rod meshing with the driving teeth is slidably mounted on the guide block, a cooling box facing inward is mounted on one end of the spur rod away from the guide block, and a blast port connected to the blower is opened on the inner side of the cooling box.

[0012] It is further configured that: a positioning module is provided in the control panel, and the positioning module includes a communication-connected orientation detection unit, a position correction analysis unit, a hole position alignment execution unit and a processor; The orientation detection unit is used to collect the conveying deflection value SP of the screw hole of the workpiece to be welded within the time threshold and obtain the rotation feed value XJ of the displacement bracket within the time threshold, and send the conveying deflection value SP and the rotation feed value XJ to the alignment correction analysis unit through the processor. After receiving the conveying deflection value SP and the rotation feed value XJ, the alignment correction analysis unit obtains the deflection coefficient PJ through numerical calculation, and compares and analyzes the deflection coefficient PJ with the preset deflection standard value PJy and sends it to the hole alignment execution unit; The hole position alignment execution unit controls related components to perform actions according to the signal generated by the alignment correction analysis unit.

[0013] The present invention has the following beneficial effects: 1. The present invention aims at the problem that the existing nut spot welding process cannot adapt to the positioning requirements of special-shaped or different thickness plate workpieces and does not have the dynamic compensation function for workpiece displacement during welding; on the one hand, the lateral movement of the nut workpiece to be welded is completed by actively regulating, and the progressive movement of the nut workpiece to be welded is formed by the displacement component, so as to realize the continuous displacement spot welding operation during the nut spot welding process; on the other hand, the support of the nut workpiece to be welded is completed by the support component with adjustable spacing, so as to adapt to workpieces of different sizes for corresponding spot welding processing; finally, the purpose of adapting to special-shaped and different-sized workpieces for adaptive continuous spot welding processing is achieved under the comprehensive mutual matching of the two; it can also be assisted by an intelligent positioning module to adjust the position of the nut workpiece to be welded during the welding action, so that the adaptive matching between the nut workpiece to be welded and the electrode rod is achieved, so as to achieve accurate positioning for welding with excessive feed and limited feed difference, and realize intelligent regulation of the nut spot welding operation; finally, the purpose of adapting to special-shaped and different-sized workpieces for adaptive continuous spot welding processing is achieved under the comprehensive mutual matching of the two, and the efficiency of nut spot welding processing is improved intelligently through dynamic compensation action; 2. In the dynamic compensation control action, during the continuous feeding process of the workpiece to be welded, if an overfeed signal is received, it means that the current nut workpiece to be welded has an "overfeed" phenomenon; if an underfeed signal is received, it means that the current nut workpiece to be welded has a "feed difference" phenomenon. At this time, the displacement support drives the nut workpiece to be welded to form a screw hole corresponding to the electrode rod to complete the precise alignment, and then the forward and reverse rotation of the front feed box and the rear feed box are combined to complete the precise correspondence between the screw hole on the nut workpiece to be welded and the electrode rod, so as to achieve precise welding of the nut; 3. During the spot welding operation, while following the active regulation, motor three will drive the spur gear rod to move horizontally through the driving teeth, and then drive the cooling box connected to the blower to move horizontally, and the air blowing port on the cooling box is always facing the nut workpiece to be welded on the front feed box and the rear feed box, and completes the air blowing cooling, thereby improving the forming efficiency of nut welding in this process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2It is a side view schematic diagram of the present invention; Figure 3 A bottom view of the structure of the displacement assembly of the present invention; Figure 4 It is a schematic diagram of the split structure of the displacement component of the present invention; Figure 5 It is a schematic diagram of the installation of the guide screw rod of the present invention; Figure 6 is a side cross-sectional view of the present invention; Figure 7 It is a schematic diagram of the installation of the cooling box of the present invention; Figure 8 It is a schematic diagram of the turning of the displacement bracket of the present invention.

[0016] In the figure: 1. Base plate; 2. Steering seat; 3. Front feed box; 4. Rear feed box; 5. Displacement bracket; 6. Welding table; 7. Electrode rod; 8. Side connecting rod; 9. Support rod; 10. Guide hole; 11. Motor 1; 12. Swing rod; 13. Fixed rod; 14. Motor 2; 15. Transmission rod; 16. Adapter plate; 17. Motor 3; 18. Guide screw rod; 19. Middle connecting rod; 20. Connecting rod seat; 21. Cooling box; 22. Guide rod; 23. Drive gear; 24. Straight gear rod; 25. Guide block. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1 In view of the problem that the existing nut spot welding process cannot adapt to the positioning requirements of special-shaped or different thickness plate workpieces, the following technical solutions are proposed: Reference Figure 1 - Figure 8As shown, in this embodiment, a positioning auxiliary device for nut spot welding processing operations includes a base plate 1, a front feed box 3 and a rear feed box 4 are symmetrically arranged above the base plate 1, and a displacement assembly is arranged in the front feed box 3 and the rear feed box 4. The displacement assembly includes a rotatably arranged displacement bracket 5, and the initial state of a pair of displacement brackets 5 is that they are respectively arranged horizontally in the front feed box 3 and the rear feed box 4, and the pair of displacement brackets 5 are used together for adjusting the position of the workpiece to be welded; a welding table 6 is arranged between the front feed box 3 and the rear feed box 4, and electrode rods 7 are evenly distributed on the welding table 6; the front feed box 3 and the rear feed box 4 are symmetrically arranged above the base plate 1, and the displacement assembly includes a rotatably arranged displacement bracket 5, and the initial state of a pair of displacement brackets 5 is that they are arranged horizontally in the front feed box 3 and the rear feed box 4, and the pair of displacement brackets 5 are used together for adjusting the position of the workpiece to be welded; a welding table 6 is arranged between the front feed box 3 and the rear feed box 4, and electrode rods 7 are evenly distributed on the welding table 6; A guide screw 18 is installed in the middle of the box 3 and the rear progressive box 4. The guide screw 18 corresponds to the front progressive box 3 and the rear progressive box 4 in opposite directions. When the guide screw 18 rotates, it drives the front progressive box 3 and the rear progressive box 4 to move closer or farther away. When adjusting the position of the workpiece to be welded, the guide screw 18 drives the front progressive box 3 and the rear progressive box 4 to move closer or farther away through the meshing transmission mutual matching relationship of the opposite thread directions, thereby changing the distance between the front progressive box 3 and the rear progressive box 4, and then realizing the adaptive installation of workpieces to be welded of different sizes. It should be supplemented that: a control panel is embedded on the base plate 1, and a photoelectric sensor and an infrared sensor are arranged above the positioning auxiliary device, which are used to obtain the moving distance of the front feeding box 3 and the rear feeding box 4 and the coordinate value of the screw hole position on the nut workpiece to be welded, and an angle sensor is arranged on the steering seat 2, which is used to obtain the rotation angle of the guide rod 22 and the displacement bracket 5 on the steering seat 2; Reference Figure 3 and Figure 4 As shown, a drive-change assembly is installed below the substrate 1 corresponding to the front feed box 3 and the rear feed box 4, and the drive-change assembly includes a steering seat 2, a motor 11 is installed on the inner side of the steering seat 2, and a swing rod 12 is connected to the output end of the motor 11. A fixed rod 13 connected to the bottom of the front feed box 3 and the rear feed box 4 is rotatably installed on the upper end of the swing rod 12. A guide hole 10 is opened on the steering seat 2, and a guide rod 22 is installed on the steering seat 2 through the guide hole 10. The motor 11 is installed on the inner side of the guide rod 22. The output end of the motor 14 is continuously equipped with a driving tooth 23 and a transmission rod 15 connected to the position-changing bracket 5. The motor 14 is started to drive the transmission rod 15 to rotate, and the transmission rod 15 drives the position-changing bracket 5 to rotate, so that the workpieces to be welded on the front feeding box 3 and the rear feeding box 4 are respectively transported in a "progressive" manner, and then the workpieces to be welded between the front feeding box 3 and the rear feeding box 4 and on the welding table 6 are transported at a fixed distance, so as to adapt to the continuous installation of nuts at different positions; Reference Figure 5 and Figure 6As shown, both ends of the front feed box 3 and the rear feed box 4 are equipped with connecting rod seats 20, and the connecting rod seats 20 on the same side are commonly penetrated with a support rod 9, and both ends of the support rod 9 are equipped with side connecting rods 8 connected to the base plate 1, one end of the guide wire rod 18 is equipped with a motor 3 17, and the lower end of the motor 3 17 is equipped with a middle connecting rod 19 connected to the base plate 1, and the longitudinal rods of the side connecting rod 8 and the middle connecting rod 19 are arranged parallel to the swing rod 12, and the single rod lengths of the side connecting rod 8, the middle connecting rod 19 and the swing rod 12 are the same. It is important to note that the side connecting rod 8 and the middle connecting rod 19 are corresponding follow-up structures with the swing rod 12, which can make the front feed box 3 and the rear feed box 4 intermittently move on the workpiece to be welded during the "swing" process of the swing rod 12 driven by the motor 11. At this time, the workpiece to be welded is on the welding table 6 and corresponds to the electrode rod 7 of the required welding nut. With the intermittent movement of the front feed box 3 and the rear feed box 4, the movement of the unit distance is completed, thereby completing the spot welding operation of the adapter nut positioning; Reference Figure 6 and Figure 7 As shown, a receiving plate 16 is installed at the end of the front feed box 3 and the rear feed box 4, and a guide block 25 is installed on the outer side of the receiving plate 16 near the motor 2 14, and a straight tooth rod 24 meshing with the driving tooth 23 is slidably installed on the guide block 25, and a cooling box 21 facing inward is installed at the end of the straight tooth rod 24 away from the guide block 25, and a blast port connected to the blower is opened on the inner side of the cooling box 21. During the spot welding operation, in the process of following active regulation, the motor 3 17 will drive the straight tooth rod 24 to move horizontally through the driving tooth 23, and then drive the cooling box 21 connected to the blower to move horizontally, and the blast port on the cooling box 21 is always facing the nut workpiece to be welded on the front feed box 3 and the rear feed box 4, and completes the blowing cooling with the movement, thereby improving the forming efficiency of nut welding in this process.

[0019] Basic principle: When the present invention is in use, on the one hand, it can actively control the lateral movement of the nut workpiece to be welded, and the displacement component constitutes the progressive movement of the nut workpiece to be welded, thereby realizing continuous displacement spot welding during the nut spot welding process; on the other hand, the spacing-adjustable supporting component is used to jointly support the nut workpiece to be welded, thereby adapting to workpieces of different sizes for corresponding spot welding processing; finally, the purpose of adapting to special-shaped and different-sized workpieces for adaptive continuous spot welding processing is achieved through the comprehensive mutual matching of the two.

[0020] Embodiment 2 In view of the problem that the existing nut welding does not have the function of dynamically compensating the displacement of the workpiece during the welding process, the positioning process in the first embodiment is further intelligently optimized; A positioning module is provided in the control panel, and the positioning module includes a communication-connected orientation detection unit, an alignment correction analysis unit, a hole alignment execution unit and a processor; the orientation detection unit is used to collect the conveying deflection value SP of the screw hole of the workpiece to be welded within the time threshold and obtain the rotation feed value XJ of the displacement bracket 5 within the time threshold, and send the conveying deflection value SP and the rotation feed value XJ to the alignment correction analysis unit via the processor; after receiving the conveying deflection value SP and the rotation feed value XJ, the alignment correction analysis unit obtains the deflection coefficient PJ through numerical calculation, and compares the deflection coefficient PJ with the preset deflection standard value PJy for analysis and sends it to the hole alignment execution unit; Specifically, S1: the photoelectric sensor and infrared sensor located above the positioning auxiliary device obtain the position of the to-be-welded screw hole of the workpiece to be welded and the coordinate value of the electrode rod 7, and the conveying deflection value SP is calculated by the difference between the longitudinal coordinate of the to-be-welded screw hole and the longitudinal coordinate of the electrode rod 7 in the same column; the angle sensor located on the steering seat 2 obtains the deflection angle of the motor 2 14 and then obtains the rotation angle of the displacement bracket 5, and the rotation feed value XJ is obtained by numerical calculation in combination with the width of the displacement bracket 5; S2: Construct the calculation formula of the eccentricity coefficient PJ: ; S3: the alignment correction analysis unit receives the deviation coefficient PJ and the deviation standard value PJy for comparison and analysis. If the deviation coefficient PJ> the deviation standard value PJy, an overfeed signal is generated and sent to the hole alignment execution unit. If the deviation coefficient PJ< the deviation standard value PJy, an underfeed signal is generated and sent to the hole alignment execution unit. If the deviation coefficient PJ=the deviation standard value PJy, no signal is generated. The hole alignment execution unit performs the following actions according to the signal generated by the alignment correction analysis unit: Action 1: When an overfeed signal is received, a control signal is sent to the motor 2 14, and the motor 2 14 is started to drive the displacement bracket 5 to rotate counterclockwise, thereby driving the nut workpieces to be welded on the front feed box 3 and the rear feed box 4 to move in the opposite direction, and at the same time, the motor 1 11 is started to drive the front feed box 3 and the rear feed box 4 to rotate counterclockwise through the swing rod 12, and the mutual coordination of the two drives the nut workpieces to be welded to complete the correction of the conveying deflection, and finally makes the screw hole position on the nut workpiece to be welded correspond to the electrode rod 7, completing the precise positioning; Action 2: When the insufficient feed signal is received, a control signal is sent to the second motor 14, and the second motor 14 is started to drive the displacement bracket 5 to rotate clockwise, thereby driving the nut workpiece to be welded on the front feed box 3 and the rear feed box 4 to move forward, and at the same time, the first motor 11 is started to drive the front feed box 3 and the rear feed box 4 to rotate clockwise through the swing rod 12. The mutual coordination of the two drives the nut workpiece to be welded to complete the correction of the conveying deflection, and finally makes the screw hole position on the nut workpiece to be welded correspond to the electrode rod 7, completing the precise positioning; In combination with Example 1 and Example 2, for Action 1 and Action 2, during the continuous feeding process of the workpiece to be welded, if an overfeed signal is received, it means that the current nut workpiece to be welded has an "overfeed" phenomenon; if an underfeed signal is received, it means that the current nut workpiece to be welded has a "feed limit" phenomenon. At this time, the displacement bracket 5 drives the nut workpiece to be welded to form a screw hole corresponding to the electrode rod 7 to complete the precise alignment, and then combined with the clockwise and counterclockwise rotation of the front feed box 3 and the rear feed box 4, the screw hole on the nut workpiece to be welded and the electrode rod 7 are precisely matched to achieve precise welding of the nut.

[0021] Embodiment 3 This embodiment combines the technical contents of the first embodiment and the second embodiment to form an auxiliary positioning method for a nut spot welding operation, including the following steps: S1: The nut workpiece to be welded is moved to the upper surface of the front feeding box 3 and the rear feeding box 4 by the conveyor belt / conveyor roller, and the position of the nut workpiece to be welded and the coordinate value of the electrode rod 7 are obtained by the photoelectric sensor and the infrared sensor, and then the deflection angle of the motor 2 14 is obtained by the angle sensor to obtain the rotation angle of the displacement bracket 5; S2: performing difference calculation based on the conveying deflection value SP and the rotation feed value XJ obtained and calculated by the photoelectric sensor, the infrared sensor and the angle sensor to obtain a deflection coefficient, and comparing and analyzing the deflection coefficient with the deflection standard value to obtain an overfeed signal and an underfeed signal; S3: According to the control signals generated by the overfeed signal and the underfeed signal, motor 1 11, motor 2 14 and motor 3 17 are respectively controlled to control the spacing between the front feed box 3 and the rear feed box 4, and the rotation angle of the displacement bracket 5, so as to jointly calibrate the precise position correspondence between the nut of the nut workpiece to be welded and the electrode rod 7, so as to achieve precise nut welding.

[0022] In summary: On the one hand, the present invention can complete the lateral movement of the nut workpiece to be welded by actively regulating the progressive movement of the nut workpiece to be welded by the displacement component, thereby realizing the continuous displacement spot welding operation during the nut spot welding process; on the other hand, the support of the nut workpiece to be welded is completed by the support component with adjustable spacing, thereby adapting to workpieces of different sizes for corresponding spot welding processing; It can also be assisted by an intelligent positioning module to adjust the position of the nut workpiece to be welded during the welding action, so that the nut workpiece to be welded and the electrode rod 7 are adaptively aligned, so as to achieve precise alignment for welding with excessive feed and feed difference, and realize intelligent regulation of the nut spot welding operation; ultimately, through the comprehensive matching of the two, the purpose of adaptive continuous spot welding processing of workpieces of different shapes and sizes is achieved, and the efficiency of nut spot welding processing is improved through the intelligent dynamic compensation action.

[0023] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0024] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0025] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A positioning auxiliary device for nut spot welding operation, comprising a base plate (1), wherein a control panel is embedded on the base plate (1), characterized in that: A front feed box (3) and a rear feed box (4) are symmetrically arranged above the substrate (1), and a displacement assembly is arranged in the front feed box (3) and the rear feed box (4), and the displacement assembly includes a rotatably arranged displacement bracket (5), and the initial state of a pair of displacement brackets (5) is to be respectively horizontally arranged in the front feed box (3) and the rear feed box (4), and the pair of displacement brackets (5) are commonly used for adjusting the position of the workpiece to be welded; a welding table (6) is arranged between the front feed box (3) and the rear feed box (4), and electrode rods (7) are evenly distributed on the welding table (6); a guide screw (18) is commonly installed in the middle of the front feed box (3) and the rear feed box (4), and the guide screw (18) corresponds to the front feed box (3) and the rear feed box (4) respectively. The thread directions of the guide screw (18) are opposite, and when the guide screw (18) rotates, it drives the front feed box (3) and the rear feed box (4) to move closer or farther away.

2. A positioning auxiliary device for nut spot welding according to claim 1, characterized in that: A drive-change assembly is installed below the base plate (1) corresponding to the front progressive box (3) and the rear progressive box (4), and the drive-change assembly includes a steering seat (2), a motor 1 (11) is installed on the inner side of the steering seat (2), an output end of the motor 1 (11) is connected to a swing rod (12), and a fixed rod (13) connected to the bottom of the front progressive box (3) and the bottom of the rear progressive box (4) is rotatably installed on the upper end of the swing rod (12).

3. A positioning auxiliary device for nut spot welding according to claim 2, characterized in that: A guide hole (10) is formed on the steering seat (2), a guide rod (22) is mounted on the steering seat (2) through the guide hole (10), a second motor (14) is mounted on the inner side of the guide rod (22), and a driving tooth (23) and a transmission rod (15) connected to the displacement bracket (5) are continuously mounted on the output end of the second motor (14).

4. A positioning auxiliary device for nut spot welding according to claim 2, characterized in that: Both ends of the front feed box (3) and the rear feed box (4) are equipped with connecting rod seats (20), and the connecting rod seats (20) on the same side are provided with supporting rods (9) passing through them. Both ends of the supporting rods (9) are equipped with side connecting rods (8) connected to the base plate (1).

5. A positioning auxiliary device for nut spot welding according to claim 4, characterized in that: A motor three (17) is mounted on one end of the guide screw rod (18), and a middle connecting rod (19) connected to the base plate (1) is mounted on the lower end of the motor three (17).

6. A positioning auxiliary device for nut spot welding according to claim 5, characterized in that: The longitudinal rods of the side connecting rod (8) and the middle connecting rod (19) are arranged parallel to the swing rod (12), and the single rod lengths of the side connecting rod (8), the middle connecting rod (19) and the swing rod (12) are the same.

7. A positioning auxiliary device for nut spot welding according to claim 3, characterized in that: The ends of the front feed box (3) and the rear feed box (4) are both installed with receiving plates (16), and the receiving plates (16) are installed with guide blocks (25) on the outer side close to the second motor (14).

8. A positioning auxiliary device for nut spot welding according to claim 7, characterized in that: A spur gear rod (24) meshing with the driving gear (23) is slidably mounted on the guide block (25); an end of the spur gear rod (24) away from the guide block (25) is mounted with a cooling box (21) facing inward; an air blowing port connected to a blower is provided on the inner side of the cooling box (21).

9. A positioning auxiliary device for nut spot welding according to claim 1, characterized in that: The control panel is provided with a positioning module, and the positioning module includes a communication-connected orientation detection unit, a position correction analysis unit, a hole position alignment execution unit and a processor; The orientation detection unit is used to collect the conveying deflection value SP of the screw hole of the workpiece to be welded within the time threshold and obtain the rotation feed value XJ of the displacement bracket (5) within the time threshold, and send the conveying deflection value SP and the rotation feed value XJ to the alignment correction analysis unit through the processor. After receiving the conveying deflection value SP and the rotation feed value XJ, the alignment correction analysis unit obtains the deflection coefficient PJ through numerical calculation, and compares and analyzes the deflection coefficient PJ with the preset deflection standard value PJy and sends it to the hole alignment execution unit; The hole position alignment execution unit controls related components to perform actions according to the signal generated by the alignment correction analysis unit.

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