Fixing device for automobile frame welding and using method thereof

Abstract

The invention discloses a fixing device for automobile frame welding and a using method thereof, and relates to the technical field of automobile frame machining, the fixing device comprises a base, and one side of the base is fixedly connected with a supporting frame. One side of the positioning plate is in sliding connection with the fixing plate, one end of the first hydraulic cylinder is fixedly connected with the first limiting piece, the first hydraulic cylinder drives the first limiting piece to move, one side of the first limiting piece is in lap joint with the frame, the second hydraulic cylinder drives the positioning plate to move, the other end of the frame is in lap joint, and the two ends of the frame are clamped and limited. The using height of a pressing rod and a second limiting piece can be adjusted through a third hydraulic cylinder, the top of the frame is pressed and limited through the second limiting piece, displacement of the frame during welding and overturning can be reduced through limiting of the two ends and the top of the frame, the fixing effect of the frame is improved, the overturning plate can be limited through the limiting rod, and the using effect of the overturning plate is improved. And the positioning plate can be limited through the first electric push rod and the insertion block, so that the stability of the fixed plate after overturning can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile frame processing, in particular to a fixing device for automobile frame welding and a use method thereof. Background Art

[0002] The frame is a frame structure that spans the front and rear axles of the car, commonly known as the beam, and is the base of the car. It is generally composed of two longitudinal beams and several cross beams. During the processing of the car frame, multiple parts need to be welded.

[0003] For example, Chinese patent CN217727640U discloses an anti-deviating automobile frame welding and fixing device, including a workbench body, the workbench body including a work table, supporting leg columns, mounting screw holes, mounting slots and mounting beams, a mounting plate is installed on the upper surface of the workbench body, the mounting plate includes a mounting base plate, a nailing side groove, a mounting screw mouth, a mounting screw, a loading and unloading handle, a stabilizing block and a beam groove, a frame fixing structure is fixedly welded and installed on the upper surface of the mounting plate, the frame fixing structure includes a support reinforcement plate, a load-bearing main rod, a support plate, a support side rod, a support end rod and a frame limiting groove, and supporting leg columns are fixedly welded and installed at the four corners of the bottom side of the work table.

[0004] In the above patent, although the problem of easy displacement of the frame during welding is solved by supporting side rods and supporting end rods, when the frame is lifted into the air, the load-bearing main rods, supporting side rods and supporting end rods are only in contact with the bottom of the frame, and the top and both ends of the frame lack limiting structures. When external equipment touches the two ends of the frame, the frame will still shift, affecting the fixing effect of the frame. Summary of the invention

[0005] The object of the present invention is to provide a fixing device for welding an automobile frame and a method for using the same, so as to solve the problem proposed in the above-mentioned background technology that when the frame is lifted up into the air, the load-bearing main rod, the supporting side rod and the supporting end rod only contact the bottom of the frame, and the top and both ends of the frame lack limiting structures. When external equipment touches the two ends of the frame, the frame will still shift, affecting the fixing effect of the frame.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fixing device for welding an automobile frame, comprising a base, one side of the base is fixedly connected to a support frame, one side of the support frame is rotatably connected to a flip plate, one side of the flip plate is fixedly connected to a fixed plate, one side of the fixed plate is provided with a fixing frame, a positioning plate and a second limiting member, one side of the fixing frame is fixedly connected to the fixing plate, one side of the fixing frame is fixedly connected to a hydraulic cylinder, one end of the hydraulic cylinder passes through the fixing frame and is fixedly connected to a limiting member, one side of the fixing frame is fixedly connected to a telescopic rod, one end of the telescopic rod is fixedly connected to the positioning plate, and one side of the positioning plate is slidably connected to the fixing plate; One side of the fixed plate is fixedly connected with a reinforcement plate and a hydraulic cylinder three, one side of the reinforcement plate is fixedly connected with a support plate, one side of the support plate is fixedly connected with a buffer plate, the support plate is penetrated by one end of the hydraulic cylinder three, one end of the support plate is hinged with a pressing rod, one side of the pressing rod is fixedly connected to a limiting member two, and one side of the pressing rod is hinged with a hinge, one end of the hinge is hinged with a connecting member, and one side of the connecting member is fixedly connected to the support plate.

[0007] Preferably, a support bar is fixedly connected to one side of the positioning plate, a pressing bar is slidably connected to one side of the positioning plate, the pressing bar is threadedly connected to a threaded rod, and one end of the threaded rod is rotatably connected to the positioning plate.

[0008] Preferably, one side of the positioning plate is fixedly connected to a second hydraulic cylinder, and one side of the second hydraulic cylinder is fixedly connected to the fixing plate.

[0009] Preferably, a connecting shaft is fixedly connected to one side of the flip plate, the connecting shaft is inserted through the support frame, and the connecting shaft is rotatably connected to the support frame.

[0010] Preferably, one end of one of the connecting shafts is drivingly connected to a reduction box, a mounting frame is fixedly connected to the bottom of the reduction box, a driving motor is fixedly connected to one side of the mounting frame, and an output shaft of the driving motor is connected to the reduction box.

[0011] Preferably, a cross bar is fixedly connected between the two flip plates, an electric push rod 1 is fixedly connected to one side of the cross bar, one end of the electric push rod 1 is fixedly connected to a connector, and one end of the connector is plugged into the positioning plate.

[0012] Preferably, a hydraulic push rod is fixedly connected to one side of the base, a limiting assembly is arranged at one end of the hydraulic push rod, the limiting assembly includes an electric push rod 2, a guide member and a limiting rod, and one side of the guide member is fixedly connected to one end of the hydraulic push rod.

[0013] Preferably, one side of the guide member is slidably connected to the base, a guide rod is fixedly connected to the top of the guide member, a limiting rod is slidably connected inside the guide rod, and the top of the limiting rod is plugged into the flip plate.

[0014] Preferably, one side of the limiting rod is fixedly connected to an electric push rod 2, and the bottom of the electric push rod 2 is fixedly connected to a guide member.

[0015] A method for using a fixing device for welding an automobile frame comprises the following steps: S1. Place the automobile frame to be welded on the buffer plate, use the hydraulic cylinder to drive the limiter to move toward the side close to the frame, so that the limiter overlaps with one end of the frame, adjust the position of the pressing strip, so that the support strip and the pressing strip are located at the upper and lower sides of the frame, adjust the position of the positioning plate, and limit the other end of the frame; S2, using hydraulic cylinder 3 to drive the pressing rod to rotate, and under the action of the hinge, the limiting member 2 is moved downward and overlapped on the top of the frame to achieve the fixed pressing limit of the frame, and the frame is welded by welding equipment; S3. After welding is completed, the driving motor and the reduction gearbox are used to drive the flip plate to rotate on one side of the support frame, and the fixed plate is rotated 90°. At this time, the electric push rod inserts the connector into the positioning plate to limit the positioning plate; S4. The hydraulic push rod drives the guide part to move along the base, so that the guide part moves to the bottom of the flip plate on the right side. The second electric push rod drives the limit rod to move upward, and the top of the limit rod is inserted into the flip plate to limit and fix the flip plate. At this time, the side wall of the frame connection can continue to be welded. After welding, the weld is quickly inspected using detection equipment.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, one side of the positioning plate is slidably connected to the fixed plate, one end of the hydraulic cylinder is fixedly connected to the limiting member one, the hydraulic cylinder one is used to drive the limiting member one to move, and one side of the limiting member one is overlapped with the frame, the hydraulic cylinder two drives the positioning plate to move, overlaps the other end of the frame, and clamps and limits the two ends of the frame, and the use height of the pressing rod and the limiting member two can be adjusted by the hydraulic cylinder three, so that the limiting member two is used to press and limit the top of the frame, and the displacement of the frame during welding and flipping can be reduced by limiting the two ends and the top of the frame, thereby improving the fixing effect of the frame.

[0017] In the present invention, a cross bar is fixedly connected between the two flip plates, one side of the flip plate is rotatably connected to the support frame, and the driving motor and the reduction box are used to drive the flip plate to rotate on one side of the support frame, and the fixed plate rotates synchronously with the flip plate to complete the flipping of the frame. The welding position of the frame can be changed by flipping the fixed plate and the frame, which is also convenient for subsequent inspection of the welds of the frame. The base can be used to support the two flip plates, which can improve the stability of the entire device during flipping and use.

[0018] 3. In the present invention, one end of the hydraulic push rod is fixedly connected to the guide member, and the two ends of the electric push rod are respectively fixedly connected to the limit rod and the guide member. The hydraulic push rod drives the guide member to move, and the electric push rod drives the limit rod to move upward, so that the limit rod is inserted into the flip plate. The limit rod can be used to limit the flip plate, and the electric push rod 1 and the plug-in block can be used to limit the positioning plate, thereby improving the stability of the fixed plate after flipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a fixing device for welding an automobile frame according to the present invention; Figure 2 This is a schematic diagram of the installation of a limit rod structure of a fixing device for welding an automobile frame according to the present invention; Figure 3 This is a schematic diagram of the connection between an electric push rod and a crossbar structure of a fixing device for welding an automobile frame of the present invention; Figure 4 This is a schematic diagram of the installation of a connecting shaft structure of a fixing device for welding an automobile frame according to the present invention; Figure 5 This is a schematic diagram of the installation of a pressing strip structure of a fixing device for welding an automobile frame according to the present invention; Figure 6 It is a schematic diagram of the installation of the second structure of the hydraulic cylinder of a fixing device for welding an automobile frame of the present invention; Figure 7 The present invention is a schematic diagram of the connection structure between a second limiter and an articulated member of a fixing device for welding an automobile frame.

[0020] In the figure: 1. Fixed plate; 11. Fixed frame; 111. Hydraulic cylinder 1; 112. Limiting member 1; 12. Reinforcement plate; 13. Positioning plate; 131. Support bar; 132. Pressing bar; 133. Telescopic rod; 134. Hydraulic cylinder 2; 14. Hydraulic cylinder 3; 15. Buffer plate; 16. Pressing rod; 17. Support plate; 18. Limiting member 2; 19. Articulated member; 2. Flip plate; 21. Cross bar; 22. Electric push rod 1; 23. Connecting shaft; 3. Reducer box; 4. Drive motor; 5. Limiting assembly; 51. Electric push rod 2; 52. Guide rod; 53. Guide member; 54. Limiting rod; 6. Support frame; 7. Base; 71. Hydraulic push rod. 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 implementation regulations described 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: Reference Figure 1-Figure 7As shown: a fixing device for welding an automobile frame, comprising a base 7, one side of the base 7 is fixedly connected to a support frame 6, one side of the support frame 6 is rotatably connected to a flip plate 2, one side of the flip plate 2 is fixedly connected to a fixed plate 1, one side of the fixed plate 1 is provided with a fixing frame 11, a positioning plate 13 and a second limiting member 18, one side of the fixing frame 11 is fixedly connected to the fixing plate 1, one side of the fixing frame 11 is fixedly connected to a hydraulic cylinder 111, one end of the hydraulic cylinder 111 passes through the fixing frame 11 and is fixedly connected to a limiting member 112, one side of the fixing frame 11 is fixedly connected to a telescopic rod 133, one end of the telescopic rod 133 is fixedly connected to the positioning plate 13, and one side of the positioning plate 13 is slidably connected to the fixing plate 1; one side of the fixing plate 1 is fixedly connected to a reinforcing plate 12 and a third hydraulic cylinder 14, and a reinforcing plate 13 is fixedly connected to the fixing plate 1. A support plate 17 is fixedly connected to one side of the fixed plate 12, a buffer plate 15 is fixedly connected to one side of the support plate 17, the support plate 17 is penetrated by one end of the hydraulic cylinder three 14, a pressing rod 16 is hinged at one end of the support plate 17, one side of the pressing rod 16 is fixedly connected to the limit member two 18, and a hinge 19 is hinged at one side of the pressing rod 16, one end of the hinge 19 is hinged to a connecting member, one side of the connecting member is fixedly connected to the support plate 17, a support bar 131 is fixedly connected to one side of the positioning plate 13, a pressing bar 132 is slidably connected to one side of the positioning plate 13, the pressing bar 132 is connected to a threaded rod through a thread, one end of the threaded rod is rotatably connected to the positioning plate 13, a hydraulic cylinder two 134 is fixedly connected to one side of the positioning plate 13, and one side of the hydraulic cylinder two 134 is fixedly connected to the fixed plate 1.

[0023] In this embodiment, the fixed frame 11 can be used to support the hydraulic cylinder 111, so that the hydraulic cylinder 111 can drive the limiting member 112 to move stably and limit one end of the automobile frame. The hydraulic cylinder 134 can be used to drive the movement of the positioning plate 13 on the top of the fixed plate 1, and then the positioning plate 13 is used to limit the other end of the frame. The telescopic rod 133 is a telescopic structure in which the inner rod and the outer rod are slidably connected. The fixed frame 11 can support and reinforce one end of the telescopic rod 133. When the positioning plate 13 moves, the telescopic rod 133 can guide the movement of the positioning plate 13, thereby improving the stability of the positioning plate 13 when moving. The support strip 131 and the pressing strip 132 can be used to increase the contact area between the positioning plate 13 and the frame, thereby improving the limiting effect of the frame. The buffer plate 15 is used to facilitate the placement of the frame before it is fixed. The support plate 17 can be used to support the bottom of the buffer plate 15, and can also be used to support the bottom of the connecting piece. The connecting piece can assist the installation and use of the hinge 19 on the top of the support plate 17. The hinge 19 can be used to achieve the connection between the pressing rod 16 and the connecting piece, and then the pressing rod 16 can be supported and assisted when the inclination angle of the pressing rod 16 is adjusted. The hydraulic cylinder three 14 can provide power for adjusting the inclination angle of the pressing rod 16.

[0024] Embodiment 2: According to Figure 1-Figure 4As shown, a connecting shaft 23 is fixedly connected to one side of the flip plate 2, and the connecting shaft 23 is inserted through the support frame 6. The connecting shaft 23 and the support frame 6 are rotatably connected, one end of one of the connecting shafts 23 is drivingly connected to a reduction box 3, and a mounting frame is fixedly connected to the bottom of the reduction box 3, and a driving motor 4 is fixedly connected to one side of the mounting frame. The output shaft of the driving motor 4 is connected to the reduction box 3, and a cross bar 21 is fixedly connected between the two flip plates 2, and an electric push rod 22 is fixedly connected to one side of the cross bar 21, and a connector is fixedly connected to one end of the electric push rod 22, and one end of the connector is plugged into the positioning plate 13.

[0025] A hydraulic push rod 71 is fixedly connected to one side of the base 7, and a limit assembly 5 is set at one end of the hydraulic push rod 71. The limit assembly 5 includes an electric push rod 2 51, a guide member 53 and a limit rod 54. One side of the guide member 53 is fixedly connected to one end of the hydraulic push rod 71, and one side of the guide member 53 is slidably connected to the base 7. A guide rod 52 is fixedly connected to the top of the guide member 53, and the limit rod 54 is slidably connected inside the guide rod 52. The top of the limit rod 54 is plugged into the flip plate 2, and one side of the limit rod 54 is fixedly connected to the electric push rod 2 51, and the bottom of the electric push rod 2 51 is fixedly connected to the guide member 53.

[0026] In this embodiment, the connecting shaft 23 is used to facilitate the connection between the auxiliary flip plate 2 and the support frame 6, the driving motor 4 can be used to drive the gear set inside the reduction box 3 to operate, and the reduction box 3 can be used to adjust the rotation speed of the flip plate 2 and the fixed plate 1, thereby realizing the flip adjustment of the fixed plate 1, and the cross bar 21 can connect the flip plates 2 on both sides to reinforce the connection between the two flip plates 2. The cross bar 21 can be used to support one end of the electric push rod 22, which is convenient for the stable installation and use of the electric push rod 22. The electric push rod 22 can be used to control the distance between the connector and the positioning plate 13, so that the connector can be inserted into the positioning plate 13 to limit and fix the positioning plate 13; At the same time, the base 7 can be used to support and reinforce one side of the hydraulic push rod 71, the hydraulic push rod 71 can be used to adjust the position of the guide member 53, the base 7 can be used to guide the movement of the guide member 53, so as to facilitate the guide member 53 to approach the bottom of the flip plate 2, the guide member 53 can be used to support and reinforce the bottom of the electric push rod 2 51, the electric push rod 2 51 can be used to adjust the use height of the limit rod 54, and when the limit rod 54 is raised or lowered, the guide rod 52 can guide it.

[0027] Embodiment 3: A method for using a fixing device for welding an automobile frame, comprising the following steps: Step 1: Place the automobile frame to be welded on the buffer plate 15, use the hydraulic cylinder 111 to drive the limiting member 112 to move to the side close to the frame, so that the limiting member 112 overlaps with one end of the frame, adjust the position of the pressing strip 132, so that the support strip 131 and the pressing strip 132 are located at the upper and lower sides of the frame, adjust the position of the positioning plate 13, and limit the other end of the frame; Step 2: Use the hydraulic cylinder 3 14 to drive the pressing rod 16 to rotate, and under the action of the hinge 19, move the limiter 2 18 downward and overlap the top of the frame to achieve the fixed pressing limit of the frame, and use welding equipment to weld the frame; Step 3: After welding, the driving motor 4 and the reduction box 3 are used to drive the flip plate 2 to rotate on one side of the support frame 6, and the fixed plate 1 is rotated 90°. At this time, the electric push rod 1 22 inserts the connector into the positioning plate 13 to limit the positioning plate 13; Step 4: The hydraulic push rod 71 drives the guide member 53 to move along the base 7, so that the guide member 53 moves to the bottom of the flip plate 2 on the right side. The electric push rod 51 drives the limit rod 54 to move upward, and the top of the limit rod 54 is inserted into the flip plate 2 to limit and fix the flip plate 2. At this time, the side wall of the frame connection can continue to be welded. After welding, the weld is quickly inspected using detection equipment.

[0028] The method of use and working principle of the device are as follows: first, the fixing plate 1 is placed horizontally, and the automobile frame is placed on the buffer plate 15. Then, the hydraulic cylinder 111 drives the limiting member 112 to move toward one side of the frame. The hydraulic cylinder 2 134 drives the positioning plate 13 to move along the fixing plate 1, so that one side of the positioning plate 13 is close to the frame until one side of the positioning plate 13 overlaps with one end of the frame. Then, the threaded rod is rotated at the top of the positioning plate 13 to move the pressing strip 132 downward to press the top of the frame. The positioning plate 13 and the limiting member 112 are used to press the top of the frame. 12 is used to fix the two ends of the frame, and then the extension length of the output shaft of the hydraulic cylinder 3 14 is adjusted. The output shaft of the hydraulic cylinder 3 14 applies a force to the pressing rod 16, so that the end of the pressing rod 16 rotates with the connection with the output shaft of the hydraulic cylinder 3 14 as the center of the circle. During the rotation of the pressing rod 16, the inclination angle of the hinge 19 changes. At this time, the pressing rod 16 is gradually in a horizontal state, so that the limiter 2 18 at the bottom of the pressing rod 16 is pressed and fixed to the top of the frame. After the frame is fixed, the frame can be quickly welded; The drive motor 4 is used to drive the reduction gearbox 3 to operate, and the reduction gearbox 3 drives the two flip plates 2 to rotate synchronously, flipping the fixed plate 1 so that the fixed plate 1 and the base 7 are perpendicular to each other. At this time, the electric push rod 1 22 is extended to insert the plug-in block into the positioning plate 13, and then the hydraulic push rod 71 drives the guide member 53 to move until one side of the guide member 53 overlaps with the support frame 6, and then the electric push rod 2 51 drives the limit rod 54 to move upward, and the bottom of the limit rod 54 slides inside the guide rod 52, and the top of the limit rod 54 is inserted into the flip plate 2 to limit the flip plate 2.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixing device for welding an automobile frame, comprising a base (7), one side of the base (7) being fixedly connected to a support frame (6), characterized in that: One side of the support frame (6) is rotatably connected to a flip plate (2), one side of the flip plate (2) is fixedly connected to a fixed plate (1), one side of the fixed plate (1) is provided with a fixed frame (11), a positioning plate (13) and a second limiting member (18), one side of the fixed frame (11) is fixedly connected to the fixed plate (1), one side of the fixed frame (11) is fixedly connected to a hydraulic cylinder (111), one end of the hydraulic cylinder (111) passes through the fixed frame (11) and is fixedly connected to a limiting member (112), one side of the fixed frame (11) is fixedly connected to a telescopic rod (133), one end of the telescopic rod (133) is fixedly connected to the positioning plate (13), and one side of the positioning plate (13) is slidably connected to the fixed plate (1); One side of the fixed plate (1) is fixedly connected to a reinforcement plate (12) and a third hydraulic cylinder (14); one side of the reinforcement plate (12) is fixedly connected to a support plate (17); one side of the support plate (17) is fixedly connected to a buffer plate (15); the support plate (17) is penetrated by one end of the third hydraulic cylinder (14); one end of the support plate (17) is hinged to a pressing rod (16); one side of the pressing rod (16) is fixedly connected to a second limiting member (18); one side of the pressing rod (16) is hinged to a hinge (19); one end of the hinge (19) is hinged to a connecting member; one side of the connecting member is fixedly connected to the support plate (17).

2. The fixing device for automobile frame welding according to claim 1, characterized in that: A support bar (131) is fixedly connected to one side of the positioning plate (13), a pressing bar (132) is slidably connected to one side of the positioning plate (13), the pressing bar (132) is threadedly connected to a threaded rod, and one end of the threaded rod is rotatably connected to the positioning plate (13).

3. The fixing device for automobile frame welding according to claim 1, characterized in that: One side of the positioning plate (13) is fixedly connected to a second hydraulic cylinder (134), and one side of the second hydraulic cylinder (134) is fixedly connected to the fixing plate (1).

4. The fixing device for automobile frame welding according to claim 1, characterized in that: A connecting shaft (23) is fixedly connected to one side of the flip plate (2); the connecting shaft (23) penetrates and is inserted into the support frame (6); the connecting shaft (23) is rotatably connected to the support frame (6).

5. The fixing device for automobile frame welding according to claim 4, characterized in that: One end of one of the connecting shafts (23) is drivingly connected to a reduction box (3), a mounting frame is fixedly connected to the bottom of the reduction box (3), a drive motor (4) is fixedly connected to one side of the mounting frame, and an output shaft of the drive motor (4) is connected to the reduction box (3).

6. The fixing device for automobile frame welding according to claim 1, characterized in that: A cross bar (21) is fixedly connected between the two flip plates (2), an electric push rod (22) is fixedly connected to one side of the cross bar (21), a plug-in component is fixedly connected to one end of the electric push rod (22), and one end of the plug-in component is plugged into the positioning plate (13).

7. The fixing device for automobile frame welding according to claim 1, characterized in that: A hydraulic push rod (71) is fixedly connected to one side of the base (7); a limit assembly (5) is provided at one end of the hydraulic push rod (71); the limit assembly (5) comprises a second electric push rod (51), a guide member (53) and a limit rod (54); one side of the guide member (53) is fixedly connected to one end of the hydraulic push rod (71).

8. The fixing device for automobile frame welding according to claim 7, characterized in that: One side of the guide member (53) is slidably connected to the base (7); the top of the guide member (53) is fixedly connected to a guide rod (52); the guide rod (52) is internally slidably connected to a limit rod (54); the top of the limit rod (54) is plugged into the flip plate (2).

9. The fixing device for automobile frame welding according to claim 8, characterized in that: One side of the limiting rod (54) is fixedly connected to the second electric push rod (51), and the bottom of the second electric push rod (51) is fixedly connected to the guide member (53).

10. A method for using a fixing device for automobile frame welding, characterized in that: A fixing device for welding an automobile frame according to any one of claims 1 to 9 is used, comprising the following steps: S1. Place the automobile frame to be welded on the buffer plate (15), use the hydraulic cylinder (111) to drive the limiting member (112) to move toward the side close to the frame, so that the limiting member (112) overlaps with one end of the frame, adjust the position of the pressing strip (132) so that the support strip (131) and the pressing strip (132) are located at the upper and lower sides of the frame, and adjust the position of the positioning plate (13) to limit the other end of the frame; S2, using hydraulic cylinder 3 (14) to drive the pressing rod (16) to rotate, and under the action of the hinge (19), the limiting member 2 (18) is moved downward and overlapped on the top of the frame to achieve the pressing and limiting of the fixed frame, and the frame is welded by welding equipment; S3. After welding is completed, the driving motor (4) and the reduction box (3) are used to drive the flip plate (2) to rotate on one side of the support frame (6), and the fixed plate (1) is rotated 90 degrees. At this time, the electric push rod (22) inserts the connector into the positioning plate (13) to limit the positioning plate (13); S4, the hydraulic push rod (71) drives the guide member (53) to move along the base (7), so that the guide member (53) moves to the bottom of the flip plate (2) located on the right side, and the electric push rod (51) drives the limit rod (54) to move upward, inserting the top of the limit rod (54) into the flip plate (2), so as to limit and fix the flip plate (2). At this time, the side wall of the frame connection can continue to be welded. After the welding is completed, the weld is quickly inspected by using the inspection equipment.

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