Metal plate box welding device

Abstract

The invention belongs to the technical field of welding equipment, and relates to a sheet metal box welding device which comprises a transverse frame, an auxiliary welding mechanism, a welding gun, a limiting mechanism, an abutting mechanism and a multi-direction adjusting structure. The auxiliary welding mechanism polishes the welding position in advance by rotating a polishing roller, oxide skin and chippings are removed, meanwhile, the welding faces are tightly attached through friction force, gaps are reduced, and the welding quality is improved. The limiting mechanism and the abutting mechanism are automatically adjusted according to the included angle of the metal plate box body, welding stability is ensured, and the connecting position is prevented from being broken when welding is not cooled. The multi-direction adjusting structure comprises a radial moving mechanism, a rotating mechanism and an overturning mechanism, the welding angle of the sheet metal box can be accurately positioned and adjusted, and automatic operation is achieved. The metal plate box welding device is suitable for welding of metal plate boxes of various specifications, the welding efficiency and quality are remarkably improved, and the wide application value is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to a sheet metal box welding device. Background Art

[0002] During the welding process of sheet metal boxes, the tightness of the welding surface directly determines the welding quality. In traditional welding processes, there are often gaps or loose fitting between welding surfaces, resulting in insufficient welding strength, uneven welds, and even defects such as cold welding and leaking welding, which seriously affect the structural strength and service life of the product. Especially when welding thinner sheet metal materials, loose welding surfaces can easily cause welding deformation or weld cracking, further increasing the difficulty of welding. The main reasons for this problem include: the sheet metal box may have dimensional errors or shape deviations during processing and assembly, resulting in the inability to fully fit the welding surface; the oxide scale, oil stains or debris on the welding surface are not cleaned up, which increases the gap between the welding surfaces. Therefore, manual auxiliary clamping or simple mechanical clamps are mostly used in the prior art, but these methods have disadvantages such as uneven clamping force, cumbersome operation, and poor adaptability, and it is difficult to meet the requirements of high-precision welding.

[0003] In view of this, the present invention proposes a sheet metal box welding device to solve the above technical problems. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] A sheet metal box welding device comprises a horizontal frame, a second sliding sports car is arranged on the horizontal frame, an auxiliary welding mechanism is arranged on the lower end surface of the second sliding sports car, the auxiliary welding mechanism comprises a mounting plate, the mounting plate is fixedly connected to the lower end surface of the second sliding sports car, a pair of deflection mounting frames are arranged at the lower end of the mounting plate, the pair of deflection mounting frames are in an inverted V shape and are rotatably connected to the mounting plate, a rotating grinding roller is arranged at the lower end of the deflection mounting frame, one side of the rotating grinding roller is fixedly connected to the output shaft of the fourth motor, and the fourth motor is fixedly connected to one side of the deflection mounting frame; Among them, a reset cylinder is provided between a pair of deflection mounting frames, a pair of No. 1 pistons are provided in the reset cylinder, the piston disc ends of the pair of No. 1 pistons are close to each other, the piston rod ends of the pair of No. 1 pistons extend out of the reset cylinder and are fixedly connected to the deflection mounting frames on the left and right sides, an exhaust hole is provided in the middle of the reset cylinder, a reset spring is embedded on the piston rod of the No. 1 piston, one end of the reset spring abuts against the piston disc of the No. 1 piston, and the other end of the reset spring abuts against the end of the reset cylinder; A welding gun is arranged on one side of the auxiliary welding mechanism, and the welding gun is fixedly connected to the lower end surface of the mounting plate.

[0006] As a preferred solution of the sheet metal box welding device provided by the present invention, a radial moving mechanism is provided below the auxiliary welding mechanism, the radial moving mechanism includes a base plate, a lead screw is provided on the base plate, the lead screw and the moving block are threadedly connected, one end of the lead screw is driven by motor No. 1, and motor No. 1 is fixedly connected to the end surface of the base plate.

[0007] As a preferred solution of the sheet metal box welding device provided by the present invention, a rotating mechanism is provided above the radial moving mechanism, and the rotating mechanism includes a No. 2 motor, the No. 2 motor is fixedly connected to the moving block, the output shaft of the No. 2 motor faces upward, and a turntable is fixedly connected to the output shaft of the No. 2 motor.

[0008] As a preferred solution of the sheet metal box welding device provided by the present invention, a flipping mechanism is provided above the rotating mechanism, the flipping mechanism includes a bracket, a clamping mechanism is provided on the bracket, a No. 3 motor is fixedly connected to one side of the bracket, and the output shaft of the No. 3 motor is fixedly connected to the clamping mechanism.

[0009] As a preferred solution of the sheet metal box welding device provided by the present invention, the clamping mechanism includes an electric telescopic rod, one end of the electric telescopic rod is fixedly connected to the bracket, and the other end of the electric telescopic rod is fixedly connected to the clamping frame. The output shaft of the electric telescopic rod slides through the clamping frame and is fixedly connected to the clamping plate, which clamps the sheet metal box to be welded.

[0010] As a preferred solution of the sheet metal box welding device provided by the present invention, a lifting mechanism is provided on the auxiliary welding mechanism, the lifting mechanism includes a vertical frame, the vertical frame is fixedly connected to both sides of the base plate, a horizontal frame is provided between the vertical frames, and a sliding sports car No. 1 is provided at both ends of the horizontal frame, and the sliding sports car No. 1 drives the horizontal frame to rise and fall along the vertical frame.

[0011] As a preferred solution of the sheet metal box welding device provided by the present invention, a limiting mechanism is provided on one side of the welding gun, and the limiting mechanism includes a pressure sensor, the pressure sensor is fixedly connected to the mounting plate, an extension plate is fixedly connected to the pressure sensor, and the lower end of the extension plate is fixedly connected to the limiting block.

[0012] As a preferred solution of the sheet metal box welding device provided by the present invention, a clamping mechanism is provided on one side of the limiting mechanism, and the clamping mechanism includes a sliding groove, a pair of sliding blocks are slidably connected in the sliding groove, and a clamping rod is fixedly connected to the lower end of the sliding block, and an air collecting cylinder is provided between the pair of sliding blocks, and a symmetrical No. 2 piston is provided in the air collecting cylinder, and the piston disc ends of the two No. 2 pistons are close to each other, and the piston rod ends of the two No. 2 pistons are extended out of the air collecting cylinder and fixedly connected to the sliding blocks on both sides, and an air guide pipe is fixedly connected to the middle part of the air collecting cylinder, and the other end of the air guide pipe is divided into two and fixedly connected to the two ends of the reset cylinder respectively.

[0013] As a preferred solution of the sheet metal box welding device provided by the present invention, during welding, the welding position of the sheet metal box passes through the auxiliary welding mechanism, the welding gun, the limiting mechanism and the tightening mechanism in sequence.

[0014] Beneficial effects of the present invention: The sheet metal box welding device provided by the present invention significantly improves the welding efficiency and quality by integrating an auxiliary welding mechanism, a limiting mechanism, a tightening mechanism and a multi-directional adjustment function. The rotating grinding roller in the auxiliary welding mechanism can pre-grind the welding position, remove oxide scale and debris, and avoid cold welding. At the same time, the friction force makes the welding surface fit tightly, reduces the gap, and improves the welding effect. The tightening mechanism can automatically adjust according to the size of the sheet metal box angle to ensure the stability of the sheet metal box during welding and prevent the connection from collapsing when the welding is not cooled. In addition, the coordinated work of the radial moving mechanism, the rotating mechanism and the flipping mechanism enables the sheet metal box to be accurately positioned and adjusted to the appropriate welding angle, reducing manual intervention and improving the degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0016] in: Figure 1 It is a schematic diagram of the overall structure of a sheet metal box welding device; Figure 2 for Figure 1 A magnified schematic diagram of the structure at center A; Figure 3 It is a schematic diagram of the connection structure of an auxiliary welding mechanism in a sheet metal box welding device; Figure 4 for Figure 3 A magnified schematic diagram of the structure at B in the middle; Figure 5 It is a schematic diagram of the connection structure of a rotating mechanism and a flipping mechanism in a sheet metal box welding device; Figure 6 for Figure 5 A magnified schematic diagram of the structure at C in the middle; Figure 7 It is a schematic diagram of the connection structure of a lifting mechanism and a radial moving mechanism in a sheet metal box welding device; Figure 8 It is a schematic diagram of the connection relationship between a reset tube, a No. 1 piston, a gas collecting cylinder and a No. 2 piston in a sheet metal box welding device; Fig. 9 The present invention is a schematic diagram of the working status of a rotating grinding roller, a welding gun and a sheet metal box in a sheet metal box welding device.

[0017] In the figure: 1. Radial moving mechanism; 11. Bottom plate; 12. Lead screw; 13. No. 1 motor; 14. Moving block; 2. Rotating mechanism; 21. No. 2 motor; 22. Turntable; 3. Flipping mechanism; 31. Bracket; 32. Motor No. 3; 4. Clamping mechanism; 41. Electric telescopic rod; 42. Clamping frame; 43. Clamping plate; 5. Lifting mechanism; 52. Vertical frame; 53. Sliding carriage No. 1; 54. Horizontal frame; 55. Sliding carriage No. 2; 6. Auxiliary welding mechanism; 61. Rotating grinding roller; 62. Deflection mounting frame; 63. No. 4 motor; 64. Mounting plate; 65. Reset cylinder; 67. No. 1 piston; 68. Exhaust hole; 69. Reset spring; 7. Welding gun; 8. Limiting mechanism; 81. Extension plate; 82. Limiting block; 83. Pressure sensor; 9. Clamping mechanism; 91. Sliding groove; 92. Sliding block; 93. Gas collecting cylinder; 94. Clamping rod; 95. Gas guide tube; 96. No. 2 piston; 100. Sheet metal enclosure. DETAILED DESCRIPTION

[0018] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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.

[0019] Example like Figure 1-Figure 9 As shown, a sheet metal box welding device includes a cross frame 54, a second sliding carriage 55 is arranged on the cross frame 54, an auxiliary welding mechanism 6 is arranged on the lower end surface of the second sliding carriage 55, the auxiliary welding mechanism 6 includes a mounting plate 64, the mounting plate 64 is fixedly connected to the lower end surface of the second sliding carriage 55, a pair of deflection mounting frames 62 are arranged at the lower end of the mounting plate 64, the pair of deflection mounting frames 62 are inverted V-shaped and rotatably connected to the mounting plate 64, a rotating grinding roller 61 is installed at the lower end of the deflection mounting frame 62, one side of the rotating grinding roller 61 is fixedly connected to the output shaft of the fourth motor 63, and the fourth motor 63 is fixedly connected to one side of the deflection mounting frame 62; Among them, a reset cylinder 65 is provided between a pair of deflection mounting frames 62, a pair of No. 1 pistons 67 are provided in the reset cylinder 65, the piston disc ends of the pair of No. 1 pistons 67 are close to each other, the piston rod ends of the pair of No. 1 pistons 67 extend out of the reset cylinder 65 and are fixedly connected to the deflection mounting frames 62 on the left and right sides, an exhaust hole 68 is provided in the middle of the reset cylinder 65, a reset spring 69 is embedded on the piston rod of the No. 1 piston 67, one end of the reset spring 69 abuts against the piston disc of the No. 1 piston 67, and the other end of the reset spring 69 abuts against the end of the reset cylinder 65; A welding gun 7 is provided on one side of the auxiliary welding mechanism 6, and the welding gun 7 is fixedly connected to the lower end surface of the mounting plate 64; The auxiliary welding mechanism 6 is provided with a lifting mechanism 5, which includes a vertical frame 52, which is fixedly connected to both sides of the bottom plate 11, a horizontal frame 54 is provided between the vertical frames 52, and a first sliding carriage 53 is provided at both ends of the horizontal frame 54, and the first sliding carriage 53 drives the horizontal frame 54 to rise and fall along the vertical frame 52; A limiting mechanism 8 is provided on one side of the welding gun 7. The limiting mechanism 8 includes a pressure sensor 83. The pressure sensor 83 is fixedly connected to the mounting plate 64. An extension plate 81 is fixedly connected to the pressure sensor 83. The lower end of the extension plate 81 is fixedly connected to a limiting block 82. During welding, the welding position of the sheet metal box 100 passes through the auxiliary welding mechanism 6, the welding gun 7, the limiting mechanism 8 and the tightening mechanism 9 in sequence.

[0020] In this embodiment, the No. 1 sliding carriage 53 drives the horizontal frame 54 to slide downward along the vertical frame 52, and the auxiliary welding mechanism 6, the limiting mechanism 8, and the tightening mechanism 9 are close to the sheet metal box 100. In this process, since the position of the sheet metal box 100 has been adjusted in the early stage, and the corner of the sheet metal box 100 is facing upward, the limiting block 82 will contact the corner of the sheet metal box 100. At the same time, after the pressure sensor 83 is pressurized, the No. 1 sliding carriage 53 stops moving. At this time, the welding gun 7 is in contact with the position to be welded at the corner of the sheet metal box 100; In the above process, when the corner of the sheet metal box 100 contacts the rotating grinding roller 61, the two rotating grinding rollers 61 will expand outward, so that the inverted V shape formed by the two rotating grinding rollers 61 opens, and at the same time, the No. 1 piston 67 is pulled outward in the reset cylinder 65, and the reset spring 69 is compressed. Due to the extension force of the reset spring 69, the No. 1 piston 67 pulls the left and right mounting plates 64 toward the center, and finally the left and right rotating grinding rollers 61 clamp the corner position of the sheet metal box 100, as shown in FIG. Fig. 9 As shown, the fourth motor 63 is then started, and the fourth motor 63 rotates as shown in FIG. Fig. 9As shown, the rotating grinding roller 61 will pre-grind the welding position when rotating to remove oxide scale or debris, prevent cold welds during welding, and ultimately lead to low welding quality. As the No. 2 sliding sports car 55 moves, the auxiliary welding mechanism 6 and the welding gun 7 continue to work along the sheet metal box 100 (the sheet metal box 100 is mostly a rectangular structure, and the connection between its surfaces needs to be welded after preliminary positioning, and the connection between the surfaces is what is referred to as the corner in this application).

[0021] It should be noted that if Fig. 9 As shown, there is generally a gap at the connection between the surfaces of the sheet metal box 100, so rotating the grinding roller 61 can clamp the two surfaces to reduce the gap, which is convenient for improving the welding effect. At the same time, the rotation direction of the grinding roller 61 has friction on both surfaces. At the same time, the friction can drive the two surfaces to fit together, further improving the welding effect. When welding, the traditional sheet metal box 100 needs to manually press the two surfaces of the welding machine position together, which makes the work efficiency low and the welding effect poor.

[0022] like Figure 1 , Figure 3 , Figure 5 and Figure 7 As shown, a radial moving mechanism 1 is provided below the auxiliary welding mechanism 6, and the radial moving mechanism 1 includes a base plate 11, on which a lead screw 12 is provided, the lead screw 12 and a moving block 14 are threadedly connected, one end of the lead screw 12 is driven by a No. 1 motor 13, and the No. 1 motor 13 is fixedly connected to the upper end surface of the base plate 11; the radial moving mechanism 1 can drive the rotating mechanism 2 to slide in the radial direction, thereby cooperating with the sheet metal box 100 for welding.

[0023] A rotating mechanism 2 is provided above the radial moving mechanism 1, and the rotating mechanism 2 includes a No. 2 motor 21, which is fixedly connected to the moving block 14, with the output shaft of the No. 2 motor 21 facing upward, and a turntable 22 is fixedly connected to the output shaft of the No. 2 motor 21; the rotating mechanism 2 can drive the flipping mechanism 3 to rotate, so that the sheet metal box 100 is rotated to a suitable position for welding.

[0024] A flipping mechanism 3 is provided above the rotating mechanism 2, and the flipping mechanism 3 includes a bracket 31, and a clamping mechanism 4 is provided on the bracket 31. A No. 3 motor 32 is fixedly connected to one side of the bracket 31, and the output shaft of the No. 3 motor 32 is fixedly connected to the clamping mechanism 4; the flipping mechanism 3 can drive the sheet metal box 100 on the clamping mechanism 4 to flip, so that the sheet metal box 100 reaches a suitable angle for welding.

[0025] The clamping mechanism 4 includes an electric telescopic rod 41, one end of which is fixedly connected to the bracket 31, and the other end of the electric telescopic rod 41 is fixedly connected to a clamping frame 42. The output shaft of the electric telescopic rod 41 slides through the clamping frame 42 and is fixedly connected to a clamping plate 43, and the clamping plate 43 clamps the sheet metal box 100 to be welded; the clamping mechanism 4 is used to clamp and fix the sheet metal box 100.

[0026] In this embodiment, the sheet metal box 100 to be welded is placed in the clamping frame 42, and then the electric telescopic rod 41 is driven so that the clamping plate 43 fixes and clamps the sheet metal box 100. The electric telescopic rod 41 is driven to deflect by the No. 3 motor 32, so that the electric telescopic rod 41 drives the clamping frame 42 and the sheet metal box 100 to deflect, so that the corner of the sheet metal box 100 (the position to be welded) faces the welding gun 7, so as to adjust the welding position. By driving the No. 2 motor 21 to rotate, the turntable 22 rotates, thereby driving the sheet metal box 100 to rotate to a suitable angle, so as to facilitate welding. When the No. 1 motor 13 is working, it can drive the lead screw 12 to rotate, and the lead screw 12 moves in the radial direction by driving the moving block 14, so that the sheet metal box 100 moves in the radial direction, and cooperates with the welding gun 7 for welding.

[0027] It can be understood that the radial moving mechanism 1, the rotating mechanism 2, the flipping mechanism 3 and the clamping mechanism 4 cooperate with each other to move the sheet metal box 100 to a suitable position and rotate it to a suitable angle so that the corner of the sheet metal box 100 to be welded faces the welding gun 7. At the same time, the above-mentioned mechanisms are all controlled by an external control system.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, a clamping mechanism 9 is provided on one side of the limiting mechanism 8, and the clamping mechanism 9 includes a sliding groove 91, in which a pair of sliders 92 are slidably connected, and a clamping rod 94 is fixedly connected to the lower end of the slider 92, and an air collecting cylinder 93 is provided between the pair of sliders 92, and a symmetrical No. 2 piston 96 is provided in the air collecting cylinder 93, and the piston disc ends of the two No. 2 pistons 96 are close to each other, and the piston rod ends of the two No. 2 pistons 96 are extended out of the air collecting cylinder 93 and fixedly connected to the sliders 92 on both sides, and an air guide pipe 95 is fixedly connected to the middle part of the air collecting cylinder 93, and the other end of the air guide pipe 95 is divided into two and respectively fixedly connected to the two ends of the reset cylinder 65.

[0029] In this embodiment, the corners of the sheet metal box 100 enter into two rotating grinding rollers 61, and the two rotating grinding rollers 61 open so that the No. 1 piston 67 is pulled out from the reset cylinder 65. Since the two ends of the reset cylinder 65 are closed, the piston disk of the No. 1 piston 67 pushes the gas into the air guide pipe 95, and then the gas enters the middle of the gas collecting cylinder 93 and pushes the No. 2 piston 96 to both sides. The No. 2 piston 96 drives the slider 92 to slide to both sides in the sliding groove 91, so that the left and right clamping rods 94 have a certain distance, so that the left and right clamping rods 94 can clamp the two surfaces of the sheet metal box 100 after welding to prevent the connection between the two surfaces from collapsing when the welding is not cooled, resulting in welding failure.

[0030] It should be understood that the larger the angle formed by the two surfaces of the sheet metal box 100, the larger the angle at which the two rotating grinding rollers 61 open (due to the action of the limit block 82, the angle of the sheet metal box 100 will be blocked by the limit block 82 when it moves upward), thereby making the No. 1 piston 67 move a greater distance in the reset cylinder 65, so that more gas enters the gas collecting cylinder 93, and the No. 2 piston 96 drives the two clamping rods 94 to move a greater distance, which can just match the large angle formed by the two surfaces of the sheet metal box 100, thereby clamping the two surfaces after welding.

[0031] In summary, the distance between the two abutting rods 94 is adaptively adjusted according to the size of the angle formed by the two surfaces of the sheet metal box 100 , so that the two abutting rods 94 can adapt to the current angle of the sheet metal box 100 .

[0032] The workflow is as follows: The sheet metal box 100 to be welded is moved to a suitable position through the radial moving mechanism 1, the rotating mechanism 2, the flipping mechanism 3 and the clamping mechanism 4, and is rotated to a suitable angle so that the corner of the sheet metal box 100 to be welded faces the welding gun 7. Then the No. 1 sliding carriage 53 drives the horizontal frame 54 to slide downward along the vertical frame 52, and the auxiliary welding mechanism 6, the limiting mechanism 8 and the tightening mechanism 9 approach the sheet metal box 100. In this process, since the position of the sheet metal box 100 has been adjusted in the early stage and the corner of the sheet metal box 100 is facing upward, the limiting block 82 will contact the corner of the sheet metal box 100. At the same time, after the pressure sensor 83 is subjected to pressure, the No. 1 sliding carriage 53 stops moving. At this time, the welding gun 7 is in contact with the corner of the sheet metal box 100 to be welded. In the above process, when the corner of the sheet metal box 100 contacts the rotating grinding roller 61, it will The two rotating grinding rollers 61 expand outward, so that the inverted V shape formed by the two rotating grinding rollers 61 opens, and at the same time, the No. 1 piston 67 is pulled outward in the reset cylinder 65, and the reset spring 69 is compressed. Due to the extension force of the reset spring 69, the No. 1 piston 67 pulls the left and right mounting plates 64 toward the center, and finally the left and right rotating grinding rollers 61 clamp the corner positions of the sheet metal box 100, and then the No. 4 motor 63 is started. The rotating grinding roller 61 will pre-grind the welding position when rotating to remove oxide scale or debris, thereby preventing cold welding during welding, which ultimately leads to low welding quality. At the same time, the connection between the surfaces of the sheet metal box 100 generally has a gap, so the rotating grinding roller 61 can clamp the two surfaces, so that the gap is reduced, which is convenient for improving the welding effect. At the same time, the rotating direction of the rotating grinding roller 61 has friction on both surfaces, and the friction can drive the two surfaces to fit together, further improving the welding effect. The traditional sheet metal box 100 needs to manually press the two surfaces of the welding machine position together during welding, which makes the work efficiency low and the welding effect poor. At the same time, the larger the angle formed by the two surfaces of the sheet metal box 100, the larger the angle opened by the two rotating grinding rollers 61, so that the moving distance of the No. 1 piston 67 in the reset cylinder 65 is larger, so that more gas enters the gas collecting cylinder 93, so that the No. 2 piston 96 drives the two pressing rods 94 to move a larger distance, which can just match the large angle formed by the two surfaces of the sheet metal box 100, so as to continuously press the two surfaces after welding. As the second sliding carriage 55 moves, the auxiliary welding mechanism 6 , the clamping mechanism 9 and the welding gun 7 continue to work along the sheet metal box 100 .

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sheet metal box welding device, comprising a horizontal frame (54), on which a second sliding carriage (55) is provided, characterized in that: An auxiliary welding mechanism (6) is provided on the lower end surface of the No. 2 sliding carriage (55), the auxiliary welding mechanism (6) comprising a mounting plate (64), the mounting plate (64) being fixedly connected to the lower end surface of the No. 2 sliding carriage (55), a pair of deflection mounting frames (62) being provided at the lower end of the mounting plate (64), the pair of deflection mounting frames (62) being in an inverted V shape and being rotatably connected to the mounting plate (64), a rotating grinding roller (61) being installed at the lower end of the deflection mounting frame (62), one side of the rotating grinding roller (61) being fixedly connected to the output shaft of the No. 4 motor (63), and the No. 4 motor (63) being fixedly connected to one side of the deflection mounting frame (62); A reset cylinder (65) is provided between the pair of deflection mounting frames (62), a pair of No. 1 pistons (67) are provided in the reset cylinder (65), the piston disc ends of the pair of No. 1 pistons (67) are close to each other, the piston rod ends of the pair of No. 1 pistons (67) extend out of the reset cylinder (65) and are fixedly connected to the deflection mounting frames (62) on the left and right sides, an exhaust hole (68) is provided in the middle of the reset cylinder (65), a reset spring (69) is embedded in the piston rod of the No. 1 piston (67), one end of the reset spring (69) abuts against the piston disc of the No. 1 piston (67), and the other end of the reset spring (69) abuts against the end of the reset cylinder (65); A welding gun (7) is provided on one side of the auxiliary welding mechanism (6), and the welding gun (7) is fixedly connected to the lower end surface of the mounting plate (64).

2. The sheet metal box welding device as claimed in claim 1, characterized in that: A radial moving mechanism (1) is provided below the auxiliary welding mechanism (6), the radial moving mechanism (1) comprising a base plate (11), a lead screw (12) being provided on the base plate (11), the lead screw (12) and the moving block (14) being threadedly connected, one end of the lead screw (12) being driven by a No. 1 motor (13), and the No. 1 motor (13) being fixedly connected to the upper end surface of the base plate (11).

3. The sheet metal box welding device as claimed in claim 2, characterized in that: A rotating mechanism (2) is provided above the radial moving mechanism (1), and the rotating mechanism (2) comprises a No. 2 motor (21). The No. 2 motor (21) is fixedly connected to the moving block (14), and the output shaft of the No. 2 motor (21) faces upwards. A rotating disk (22) is fixedly connected to the output shaft of the No. 2 motor (21).

4. The sheet metal box welding device as claimed in claim 3, characterized in that: A flip mechanism (3) is provided above the rotating mechanism (2), the flip mechanism (3) comprising a bracket (31), a clamping mechanism (4) being provided on the bracket (31), a third motor (32) being fixedly connected to one side of the bracket (31), and an output shaft of the third motor (32) being fixedly connected to the clamping mechanism (4).

5. The sheet metal box welding device as claimed in claim 4, characterized in that: The clamping mechanism (4) comprises an electric telescopic rod (41), one end of the electric telescopic rod (41) is fixedly connected to the bracket (31), the other end of the electric telescopic rod (41) is fixedly connected to a clamping frame (42), the output shaft of the electric telescopic rod (41) slides through the clamping frame (42) and is fixedly connected to a clamping plate (43), and the clamping plate (43) clamps a sheet metal box (100) to be welded.

6. The sheet metal box welding device as claimed in claim 5, characterized in that: The auxiliary welding mechanism (6) is provided with a lifting mechanism (5), the lifting mechanism (5) comprising a vertical frame (52), the vertical frame (52) being fixedly connected to both sides of the bottom plate (11), a horizontal frame (54) being provided between the vertical frames (52), a first sliding carriage (53) being provided at both ends of the horizontal frame (54), and the first sliding carriage (53) driving the horizontal frame (54) to move up and down along the vertical frame (52).

7. The sheet metal box welding device as claimed in claim 6, characterized in that: A limiting mechanism (8) is provided on one side of the welding gun (7), the limiting mechanism (8) comprising a pressure sensor (83), the pressure sensor (83) being fixedly connected to the mounting plate (64), an extension plate (81) being fixedly connected to the pressure sensor (83), and a limiting block (82) being fixedly connected to the lower end of the extension plate (81).

8. The sheet metal box welding device as claimed in claim 7, characterized in that: A clamping mechanism (9) is provided on one side of the limiting mechanism (8), the clamping mechanism (9) comprising a sliding groove (91), a pair of sliders (92) being slidably connected in the sliding groove (91), a clamping rod (94) being fixedly connected at the lower end of the slider (92), a gas collecting cylinder (93) being provided between the pair of sliders (92), a symmetrical No. 2 piston (96) being provided in the gas collecting cylinder (93), the piston disc ends of the two No. 2 pistons (96) being close to each other, the piston rod ends of the two No. 2 pistons (96) extending out of the gas collecting cylinder (93) being fixedly connected to the sliders (92) on both sides, an air guide tube (95) being fixedly connected to the middle of the gas collecting cylinder (93), the other end of the air guide tube (95) being divided into two and respectively fixedly connected to the two ends of the reset cylinder (65).

9. The sheet metal box welding device as claimed in claim 8, characterized in that: During welding, the welding position of the sheet metal box (100) passes through the auxiliary welding mechanism (6), the welding gun (7), the limiting mechanism (8) and the tightening mechanism (9) in sequence.

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