Auxiliary welding system applied to automobile rear floor and side wall assembly

Abstract

The invention discloses an auxiliary welding system applied to an automobile rear floor and side wall assembly. The auxiliary welding system comprises a production line support, side frames are arranged at the tops of the two ends of the production line support, a production line rotating ring frame is erected at the tops of the side frames, an adjustable rotating conveying mechanism is arranged on the inner wall of the production line rotating ring frame, and an arc-shaped collecting frame is arranged in the center of the top of the production line support. On the aspects of flexible adaptation and efficient transportation positioning, a special-shaped bracket of the limiting type lifting mechanism can be exchanged according to needs, an electric sliding table drives the special-shaped bracket to be matched with a supporting point, an assembly can be rapidly transported to the position between rotary ring frames of a production line, and precise positioning and preliminary limiting are achieved in cooperation with a driving motor set and related parts; in the aspects of welding optimization and fixation, a production line rotating ring frame facilitates welding and inverted impurity removal, an annular welding frame is matched with a movable base to achieve fine welding, and an anti-disengaging gripper achieves multiple limiting through a rotary air cylinder and an electromagnet material gripping joint.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing, in particular to an auxiliary welding system used in an automobile rear floor and side panel assembly. Background Art

[0002] With the progress of society and the development of economy, the demand for automobiles is growing continuously. In order to meet the huge market demand, automobile manufacturers need to continuously innovate technology, improve production efficiency and product quality, and achieve the production goals of high technology, high quality and high efficiency. In automobile production, the welding of the rear floor and side panel assembly is one of the key processes, which directly affects the overall structural strength and safety of the automobile. Therefore, a more advanced auxiliary welding system is needed to ensure welding quality and production efficiency.

[0003] The structure of the rear floor and side panel assembly of a car is usually complex and irregular in shape, with a large number of curves, corners and connection points of plates of different thicknesses. This requires precise control of the welding path and welding parameters during the welding process to ensure the quality and strength of the weld and avoid welding defects such as cold welds, leaking welds, and pores. A large amount of heat will be generated during the welding process, causing thermal deformation of the weld. For large thin-plate structural parts such as the rear floor and side panel assembly of a car, thermal deformation may affect its dimensional accuracy and assembly accuracy, thereby affecting the appearance and performance of the car.

[0004] In conjunction with the above content, it should be noted that: Chinese patent application number CN2020103697588 discloses a flexible welding production line for automobile body-in-white side panel assembly, which realizes the production and processing of left and right side panels by setting up symmetrically distributed side panel production lines, reduces robot operation stations, reduces the cost investment of welding production lines, and effectively reduces the floor space of the production line, thereby improving the utilization rate of the plant site; In fact, during use, it is necessary to continuously calibrate and adjust the position of the side panel assembly according to the moving position, resulting in a continuous increase in auxiliary equipment on the production line, which increases the overall production and processing efficiency and operating costs. At the same time, the synchronous welding process of the connection between the rear floor and the side panel assembly of the automobile causes a low degree of fit in the traditional production process, which can easily cause misalignment of the connection between the rear floor and the side panel assembly, resulting in welding errors and other phenomena.

[0005] In view of the above-mentioned technical defects, a solution is now proposed. Summary of the invention

[0006] The object of the present invention is to provide an auxiliary welding system for use in an automobile rear floor and side panel assembly to solve the problems raised.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an auxiliary welding system applied to the rear floor and side panel assembly of an automobile, comprising a production line bracket, side frames are arranged on the tops of both ends of the production line bracket, a production line rotating ring frame is arranged on the top of the side frames, an adjustable rotating conveying mechanism is arranged on the inner wall of the production line rotating ring frame, an arc-shaped collecting frame is arranged at the center of the top of the production line bracket, an annular welding frame is arranged on the top of the arc-shaped collecting frame, a welding movable base is slidably arranged on the inner wall of the annular welding frame, and an exhaust ring and a welding piece are arranged at the bottom of the welding movable base; The adjustable rotating conveying mechanism includes a column beam plate and a side beam plate, a limited lifting mechanism is slidably arranged on the inner wall of the column beam plate, a plurality of groups of anti-slip grippers are arranged on the inner wall of the side beam plate, and the limited lifting mechanism includes a transverse frame and a special-shaped bracket.

[0008] Furthermore, slag discharge troughs located between the arc-shaped collecting frame and the side frame are symmetrically arranged at the top of both ends of the production line bracket, linear guide rails are symmetrically arranged at the top of both sides of the arc-shaped collecting frame, matching guide frames are symmetrically arranged in the middle of the inner wall of the arc-shaped collecting frame, and a low-lying groove connected to the slag discharge trough is recessed in the center of the bottom of the arc-shaped collecting frame.

[0009] Furthermore, a metal fitting fixedly connected to a side frame is provided at the bottom of the production line rotating ring frame, an annular driving guide rail is provided on the inner wall of the production line rotating ring frame, and a controllable motor embedded in the side frame is provided at the bottom of the annular driving guide rail.

[0010] Furthermore, an outer arc frame slidably connected to the annular driving guide rail is provided on the outer wall of the column beam plate, a driving motor group close to the outer arc frame is provided at the bottom of one end of the column beam plate, and a distribution groove slidably connected to the transverse frame is recessed on the inner wall of the column beam plate, and a limiting roller connected to the driving motor group and the transverse frame is provided inside the distribution groove.

[0011] Furthermore, a transverse cylinder embedded in the top surface of the column beam plate is provided at the bottom of the side beam plate, and a rotary cylinder 1 connected to the anti-slip gripper is provided at the bottom of the inner wall of the side beam plate. The anti-slip gripper is composed of multiple groups of gripping sections and rotary cylinder 2, and the multiple groups of gripping sections are connected through rotary cylinder 2.

[0012] Furthermore, moving blocks are symmetrically arranged on both sides of the transverse moving frame, a straight groove is recessed on the inner wall of the transverse moving frame, an electric slide that slides with the straight groove is arranged at the bottom of the special-shaped bracket, and a bolt hole that is sleeved with the special-shaped bracket is arranged at the top of the electric slide.

[0013] Furthermore, linear stepping motors are arranged at the bottom of both sides of the annular welding frame, an annular raised guide rail is arranged at the middle of the inner wall of the annular welding frame, and unloading troughs are arranged obliquely at the bottom of both ends of the annular welding frame.

[0014] Furthermore, air jets are symmetrically arranged at the top of both ends of the welding movable base, a driving wheel member cooperating with the annular raised guide rail is arranged at the top of the welding movable base, a telescopic mechanical arm rod facing the adjustable rotating conveying mechanism is arranged at the bottom of the welding movable base, the exhaust ring is sleeved on the outer wall of the bottom of the telescopic mechanical arm rod, and the welding frame is sleeved on the center of the bottom of the telescopic mechanical arm rod, a servo motor and an air pump are arranged inside the welding movable base, the servo motor is provided with a coupling which is transmission-connected to the driving wheel member, the air pump is connected to the air jet and the exhaust ring through an air pipe, and a filter is arranged on the inner wall of the exhaust ring.

[0015] The beneficial effects of the present invention are: 1. The present invention uses a special-shaped bracket in a limited lifting mechanism to be exchanged and adapted according to the support requirements of the rear floor and side panel assembly of the automobile. The electric slide can drive the special-shaped bracket to move to match the bottom support point, which greatly improves the flexible adaptability to different batches of products. The electric slide is combined with a moving block and a delivery trough to quickly move the limited lifting mechanism and the assembly to the rotating ring frame of the production line; the driving motor group drives the limited lifting mechanism to move along the delivery trough, and cooperates with the side beam plate, anti-slip gripper, etc. to achieve precise positioning and preliminary limiting, thereby improving transportation and assembly efficiency, and efficient transportation and positioning.

[0016] 2. The present invention uses a rotating ring frame on the production line to drive the rear floor and side panel assembly of the automobile to rotate, which is convenient for welding operations. The welding operation can also be inverted so that welding impurities fall to the arc-shaped collection frame, keeping the surface of the assembly clean and improving the welding quality and service life. The annular welding frame cooperates with the welding mobile base to achieve detailed welding in multiple areas, multiple angles, and multiple dimensions, which is efficient and centralized, reduces the transportation spacing and equipment space, optimizes the welding process, and the anti-slip gripper achieves multi-angle attachment through a rotary cylinder. The gripping section is made of electromagnet material, which generates magnetic adsorption after power is turned on, realizing multi-point contact limiting of the rear floor and side panel assembly of the automobile, ensuring that the components are stable during the welding process and are fixed with multiple limits.

[0017] 3. The present invention uses an air pump to extract high-temperature hot air from the welding point area through an exhaust ring, controls the welding point temperature, promotes rapid forming of the welding area, and reduces impurity adhesion and welding defects; after being treated, part of the extracted high-temperature air can be used to clean welding impurities in the discharge valve and low-lying grooves, ensuring the cleanliness of the welding equipment and the control of the welding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the production line support of the present invention; Figure 3 It is a structural schematic diagram of the production line support and the production line rotating ring frame of the present invention; Figure 4 It is a structural schematic diagram of the adjustable rotating conveying mechanism and the position-limiting lifting mechanism of the present invention; Figure 5 It is a partial three-dimensional structural schematic diagram of the column-beam plate of the present invention; Figure 6 It is a structural schematic diagram of the driving motor group of the present invention; Figure 7 It is a structural schematic diagram of the position-limiting lifting mechanism of the present invention; Figure 8 It is a structural schematic diagram of the annular welding frame of the present invention; Fig. 9 It is a structural schematic diagram of the welding movable base of the present invention.

[0020] Figure numerals: 1. production line bracket; 101. arc-shaped collecting rack; 102. linear guide rail; 103. matching guide frame; 104. low-lying trough; 105. side frame; 106. slag discharge trough; 2. production line rotating ring frame; 201. annular driving guide rail; 3. annular welding frame; 301. linear stepping motor; 302. annular raised guide rail; 303. discharge trough; 4. adjustable rotating conveying mechanism; 401. column beam plate ; 402, side beam plate; 403, anti-slip gripper; 404, distribution trough; 405, outer arc frame; 406, drive motor group; 5, limited lifting mechanism; 501, transverse frame; 502, special-shaped bracket; 503, electric slide; 504, moving block; 6, welding mobile base; 601, jet nozzle; 602, driving wheel; 603, telescopic mechanical arm rod; 604, exhaust ring; 605, welding parts. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0022] Example 1: Please refer to Figure 1 - Fig. 9As shown, this embodiment is an auxiliary welding system used in the rear floor and side panel assembly of an automobile, including a production line bracket 1, side frames 105 are arranged on the top of both ends of the production line bracket 1, a production line rotating ring frame 2 is arranged on the top of the side frame 105, an adjustable rotating conveying mechanism 4 is arranged on the inner wall of the production line rotating ring frame 2, an arc-shaped collecting frame 101 is arranged at the top center of the production line bracket 1, an annular welding frame 3 is arranged on the top of the arc-shaped collecting frame 101, a welding movable base 6 is slidably arranged on the inner wall of the annular welding frame 3, and an exhaust ring 604 and a welding part 605 are arranged at the bottom of the welding movable base 6.

[0023] In the control system of the overall automobile rear floor and side panel assembly processing production line, the initially assembled and connected automobile rear floor and side panel assembly are limited on the limiting lifting mechanism 5, and the special-shaped bracket 502 in the limiting lifting mechanism 5 is replaced and adapted according to the support needs of the rear floor and side panel assembly of this batch of automobiles. The replaced special-shaped bracket is inserted into the drop hole of the electric slide 503 by bolts, and is fixed with suitable nuts, waiting to lift the automobile rear floor and side panel assembly to the limiting lifting mechanism 5 after multiple groups are arranged.

[0024] A slag discharge trough 106 located between the arc-shaped collecting frame 101 and the side frame 105 is symmetrically arranged at the top of both ends of the production line bracket 1, a linear guide rail 102 is symmetrically arranged at the top of both sides of the arc-shaped collecting frame 101, a matching guide frame 103 is symmetrically arranged in the middle of the inner wall of the arc-shaped collecting frame 101, and a low-lying groove 104 connected to the slag discharge trough 106 is recessed in the center of the bottom of the arc-shaped collecting frame 101.

[0025] Linear stepping motors 301 are arranged at the bottom of both sides of the annular welding frame 3, an annular raised guide rail 302 is arranged at the middle of the inner wall of the annular welding frame 3, and unloading grooves 303 are arranged obliquely at the bottom of both ends of the annular welding frame 3.

[0026] The annular welding frame 3 cooperates with the linear guide rail 102 through the linear stepping motor 301, thereby driving the annular welding frame 3 to move along the top of the production line bracket 1, and the moving range is located between the two groups of production line rotating ring frames 2. Based on this, the rotation of the production line rotating ring frames 2 is coordinated to complete the adaptive adjustment welding processing of multiple areas, multiple corners and difficult welding points on the rear floor and side panel assembly of the automobile.

[0027] Air jets 601 are symmetrically arranged at the top of both ends of the welding mobile base 6, a driving wheel 602 cooperating with the annular raised guide rail 302 is arranged at the top of the welding mobile base 6, a telescopic mechanical arm rod 603 facing the adjustable rotating conveying mechanism 4 is arranged at the bottom of the welding mobile base 6, an exhaust ring 604 is sleeved on the bottom outer wall of the telescopic mechanical arm rod 603, and a welding frame 605 is sleeved on the bottom center of the telescopic mechanical arm rod 603, a servo motor and an air pump are arranged inside the welding mobile base 6, the servo motor is provided with a coupling and is transmission-connected to the driving wheel 602, the air pump is connected to the air jet 601 and the exhaust ring 604 through an air pipe, and a filter is arranged on the inner wall of the exhaust ring 604.

[0028] The internal servo motor of the welding mobile base 6 is connected to the driving wheel 602 through a coupling, thereby driving the welding mobile base 6 to move along the surface of the annular raised guide rail 302, so as to adjust the position of the welding part 605, and drive the welding part 605 to perform multi-angle, multi-axial linkage and multi-dimensional spatial adjustment through the telescopic mechanical arm 603, so as to perform detailed welding processing on the rear floor and side panel assembly of the automobile. It should be noted that the welding mobile base 6 can be provided with multiple groups for short-distance, multi-dimensional, efficient and centralized continuous welding processing of the rear floor and side panel assembly of the automobile, thereby greatly reducing the transportation distance between the rear floor and the side panel assembly of the automobile, and reducing the space occupied by the equipment inside the factory.

[0029] The air pump is connected to the air jet 601 and the air extraction ring 604 through a regulating valve and a pipeline. The air extraction ring 604 follows the weldment 605 close to the welding point area of ​​the rear floor and the side assembly of the automobile, so as to facilitate the concentrated extraction of the high-temperature hot air generated by welding in the welding point area, so as to control the temperature of the welding point area, help the welding area to form quickly, reduce the adhesion of impurities and welding defects caused by the ambient temperature, and the extracted high-temperature air is transported and exposed to the air environment through a longer pipeline, which helps to continuously cool it down and transport the air to the air pump. The air pump is provided with an exhaust port for active discharge of most of the air. When the welding mobile base 6 is close to the unloading trough 303 area on the annular welding frame 3, the regulating valve guides part of the air into the air jet 601 for pneumatic cleaning of welding impurities inside the unloading valve and in the low-lying trough 104.

[0030] Embodiment 2: This embodiment is an auxiliary welding system used in the rear floor and side panel assembly of an automobile, including an adjustable rotating conveying mechanism 4 including a column beam plate 401 and a side beam plate 402, a limited lifting mechanism 5 is slidably arranged on the inner wall of the column beam plate 401, and multiple groups of anti-slip grippers 403 are arranged on the inner wall of the side beam plate 402, and the limited lifting mechanism 5 includes a transverse frame 501 and a special-shaped bracket 502.

[0031] The bottom of the production line rotating ring frame 2 is provided with metal accessories fixedly connected to the side frame 105, the inner wall of the production line rotating ring frame 2 is provided with an annular driving guide rail 201, and the bottom of the annular driving guide rail 201 is provided with a controllable motor embedded in the side frame 105.

[0032] The production line rotating ring frame 2 is connected to the annular drive guide rail 201 through a coupling by a controllable motor according to the welding needs of the rear floor and side panel assembly of the automobile. Accordingly, the adjustable rotating conveying mechanism 4 moves along the surface of the annular drive guide rail 201 through the arc frame, and drives the rear floor and side panel assembly of the automobile to rotate after being limited, which is used to cooperate with the welding process. At the same time, it helps to invert the welding operation of the rear floor and side panel assembly of the automobile according to the welding needs, so that the welding impurities generated during welding fall onto the arc collection frame 101, thereby avoiding the welding impurities from falling on the parts around the welding points on the rear floor and side panel assembly of the automobile, which helps to keep the surface of the rear floor and side panel assembly of the automobile clean, and improve the service life and subsequent welding effect.

[0033] An outer arc frame 405 is provided on the outer wall of the column beam plate 401 and is slidably connected to the annular driving guide rail 201. A driving motor group 406 is provided at the bottom of one end of the column beam plate 401 and is close to the outer arc frame 405. A distribution groove 404 is recessed on the inner wall of the column beam plate 401 and is slidably connected to the transverse frame 501. A limiting roller connected to the driving motor group 406 and the transverse frame 501 is provided inside the distribution groove 404.

[0034] A transverse cylinder embedded in the top surface of the column beam plate 401 is provided at the bottom of the side beam plate 402, and a rotary cylinder 1 connected to the anti-slip gripper 403 is provided at the bottom of the inner wall of the side beam plate 402. The anti-slip gripper 403 is composed of multiple groups of gripping sections and rotary cylinder 2, and the multiple groups of gripping sections are connected through rotary cylinder 2.

[0035] The driving motor group 406 is connected to the limiting roller through a coupling, and the limiting roller contacts the side wall of the moving block 504, thereby driving the limiting lifting mechanism 5 to move along the distribution slot 404, and the side beam plate 402 is driven by the transverse cylinder to slide along the top of the column beam plate 401 close to the outer wall of the rear floor and side panel assembly of the automobile to initially limit it, and the anti-slip gripper 403 is driven to rotate by the rotary cylinder 1, and then attached to the outer wall of the rear floor and side panel assembly of the automobile, and then driven by the rotary cylinder 2 to drive multiple groups of gripping sections to adaptively attach to the outer wall of the rear floor and side panel assembly of the automobile, thereby realizing multi-point contact limiting of the rear floor and side panel assembly of the automobile. It should be noted that the gripping section can be made of electromagnet material, accordingly, when the gripping section contacts the metal material body of the rear floor and side panel assembly of the automobile, it can be energized to generate magnetic adsorption to realize multiple limiting fixations.

[0036] Moving blocks 504 are symmetrically arranged on both sides of the transverse moving frame 501, a straight groove is recessed on the inner wall of the transverse moving frame 501, an electric slide 503 slidably matched with the straight groove is arranged at the bottom of the special-shaped bracket 502, and a bolt hole is arranged on the top of the electric slide 503 to be sleeved with the special-shaped bracket 502.

[0037] Before the rear floor and side panel assembly of the automobile is loaded, a built-in power supply is provided inside the electric slide 503, or a power cord connected to the electric slide 503 is provided in a fixed area on the production line to provide power drive for the electric slide 503. The electric slide 503 drives the special-shaped bracket 502 to move inside the straight groove on the transverse frame 501 to match the bottom support point of the rear floor and side panel assembly of the automobile waiting to be loaded. After the loading is completed, the moving block 504 cooperates with the distribution groove 404 to move the limited lifting mechanism 5 and the rear floor and side panel assembly of the automobile to between the rotating ring frame 2 of the production line.

[0038] Combining Example 1 and Example 2, it can be seen that the present invention has flexible adaptation and efficient transportation and positioning. The special-shaped bracket 502 of the limiting lifting mechanism 5 can be replaced as needed, and the electric slide 503 drives its matching support point, and can also quickly transport the assembly to the production line rotating ring frame 2, cooperating with the drive motor group 406 and related components to achieve precise positioning and preliminary limiting.

[0039] In terms of welding optimization and fixation, the production line's rotating ring frame 2 is convenient for welding and inverted impurity removal, the annular welding frame 3 cooperates with the mobile base to achieve delicate welding, and the anti-slip gripper 403 achieves multiple limit positions through the rotary cylinder and the electromagnet material grip; in addition, the air pump uses the exhaust ring 604 to control the weld point temperature and clean welding impurities to achieve welding environment control.

[0040] 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. An auxiliary welding system for a rear floor and side panel assembly of an automobile, comprising a production line bracket (1), characterized in that: The production line support (1) is provided with side frames (105) at the top of both ends, a production line rotating ring frame (2) is provided on the top of the side frames (105), an adjustable rotating conveying mechanism (4) is provided on the inner wall of the production line rotating ring frame (2), an arc-shaped collecting frame (101) is provided at the center of the top of the production line support (1), an annular welding frame (3) is provided on the top of the arc-shaped collecting frame (101), a welding movable base (6) is slidably provided on the inner wall of the annular welding frame (3), and an exhaust ring (604) and a welding part (65) are provided at the bottom of the welding movable base (6); The adjustable rotary conveying mechanism (4) comprises a column beam plate (401) and a side beam plate (402); a limited lifting mechanism (5) is slidably arranged on the inner wall of the column beam plate (401); a plurality of groups of anti-slip grippers (403) are arranged on the inner wall of the side beam plate (402); and the limited lifting mechanism (5) comprises a transverse frame (501) and a special-shaped bracket (502).

2. The auxiliary welding system used in the rear floor and side panel assembly of an automobile according to claim 1 is characterized in that: A slag discharge trough (106) located between the arc-shaped collecting frame (101) and the side frame (105) is symmetrically arranged at the top of both ends of the production line support (1), linear guide rails (102) are symmetrically arranged at the top of both sides of the arc-shaped collecting frame (101), a matching guide frame (103) is symmetrically arranged in the middle of the inner wall of the arc-shaped collecting frame (101), and a low-lying groove (104) connected to the slag discharge trough (106) is arranged in a concave center at the bottom of the arc-shaped collecting frame (101).

3. The auxiliary welding system used in the rear floor and side panel assembly of an automobile according to claim 1 is characterized in that: The bottom of the production line rotating ring frame (2) is provided with a metal fitting fixedly connected to the side frame (105), the inner wall of the production line rotating ring frame (2) is provided with an annular driving guide rail (201), and the bottom of the annular driving guide rail (201) is provided with a controllable motor embedded in the inside of the side frame (105).

4. The auxiliary welding system used in the rear floor and side panel assembly of an automobile according to claim 3 is characterized in that: An outer arc frame (405) slidably sleeved with the annular driving guide rail (201) is arranged on the outer wall of the column beam plate (401); a driving motor group (406) close to the outer arc frame (405) is arranged at the bottom of one end of the column beam plate (401); a delivery groove (404) slidably sleeved with the transverse frame (501) is arranged in a recessed manner on the inner wall of the column beam plate (401); a limiting roller connected to the driving motor group (406) and the transverse frame (501) is arranged inside the delivery groove (404).

5. The auxiliary welding system used in the rear floor and side panel assembly of an automobile according to claim 4 is characterized in that: The bottom of the side beam plate (402) is provided with a transverse cylinder embedded in the top surface of the column beam plate (401), and the bottom of the inner wall of the side beam plate (402) is provided with a rotary cylinder 1 sleeved with an anti-slip gripper (403). The anti-slip gripper (403) is composed of a plurality of gripping sections and a rotary cylinder 2 spliced ​​together, and the plurality of gripping sections are connected via the rotary cylinder 2.

6. The auxiliary welding system used in the rear floor and side panel assembly of an automobile according to claim 1, characterized in that: Moving blocks (504) are symmetrically arranged on both sides of the transverse moving frame (501), a straight groove is recessed on the inner wall of the transverse moving frame (501), an electric slide (503) slidably matched with the straight groove is arranged at the bottom of the special-shaped bracket (502), and a bolt hole is arranged on the top of the electric slide (503) to be sleeved with the special-shaped bracket (502).

7. The auxiliary welding system used in the rear floor and side panel assembly of an automobile according to claim 1, characterized in that: Linear stepping motors (301) are arranged at the bottom of both sides of the annular welding frame (3), an annular raised guide rail (302) is arranged in the middle of the inner wall of the annular welding frame (3), and discharge troughs (303) are arranged obliquely at the bottom of both ends of the annular welding frame (3).

8. The auxiliary welding system used in the rear floor and side panel assembly of an automobile according to claim 7 is characterized in that: The tops of both ends of the welding movable base (6) are symmetrically provided with air jets (601); the top of the welding movable base (6) is provided with a driving wheel (602) that cooperates with the annular raised guide rail (302); the bottom of the welding movable base (6) is provided with a telescopic mechanical arm rod (603) facing the adjustable rotating conveying mechanism (4); the air extraction ring (604) is sleeved on the outer wall of the bottom of the telescopic mechanical arm rod (603); and the welding frame (605) is sleeved on the bottom center of the telescopic mechanical arm rod (603).

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