A bending and welding device for bending and welding simultaneously

Abstract

The application discloses a bending and welding device with synchronous bending and welding processes, and belongs to the bending and welding field. The device comprises a base, a support fixed on the base, a bending inner core and a bending assembly fixed on one side of the support, a second opening arranged in the support, and a welding part fixed in the second opening and with a welding gun output end facing the lower side of the bending inner core. A merging alignment assembly is further arranged on the support. The merging alignment assembly comprises a first opening arranged in the support and a first movable seat slidingly arranged in the first opening. According to the application, the merging alignment assembly is arranged on the support, and the merging part of the two ends of the plate bending is uniformly constrained by the alignment pressing seat. The first movable seat is driven to ascend and descend by the adjusting part, so that the alignment pressing seat can be pressed on the merging part of the plate, the misalignment caused by the bending springback is eliminated, the flatness and consistency of the two sides of the welding seam before welding are ensured, and the welding quality problem caused by poor alignment is solved.

Description

Technical Field

[0001] This invention relates to the field of bending and welding, and more specifically, to a bending and welding apparatus that performs bending and welding processes simultaneously. Background Technology

[0002] With the continuous development of the sheet metal processing industry, the production of metal boxes, housings, and other products often requires two processes: bending and welding. In order to improve production efficiency, existing bending and welding equipment attempts to integrate the bending and welding processes into the same workstation for simultaneous operation.

[0003] In existing synchronous bending and welding processes, the sheet metal is typically fitted onto a bending core, and an external die bends it into shape, causing its two ends to meet below the core. However, the following technical problems exist in actual operation: Due to the unevenness of the sheet material, the springback deviation during bending, and the positioning error of the mechanical structure, the two ends of the sheet often fail to achieve a flush finish after bending, easily resulting in misalignment, uneven gaps, or localized warping. Direct welding at the junction will severely affect the mechanical strength and appearance quality of the weld, and may even lead to defective products. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a bending and welding device that performs bending and welding processes simultaneously.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A bending and welding device that performs bending and welding processes simultaneously includes a base, a bracket fixed on the base, a bending core and a bending assembly fixed to one side of the bracket, a second opening inside the bracket, and a welding part fixed in the second opening with the output end of the welding gun facing downwards from the bending core. The bracket is also provided with a convergence and alignment assembly, which includes a first opening inside the bracket, a first movable seat that slides in the first opening, a hollow groove inside the first movable seat to facilitate welding with a welding gun, two symmetrically arranged alignment pressure seats on the upper end of the first movable seat, two lateral constraint assemblies fixed on the upper end of the first movable seat and located between the two alignment pressure seats, and an adjustment part fixed to one side of the bracket and driven to lift the first movable seat through a screw drive mechanism. The two alignment pressure seats are raised and lowered to abut against the surface of the plate to provide flush constraint at the junction of the two bent ends of the plate.

[0007] Furthermore, the lateral constraint assembly includes a side seat fixed to the upper end of the first movable seat, a first movable groove opened inside the side seat, a second movable seat slidably connected in the first movable groove, a roller rotatably connected to the upper end of the second movable seat, a second lead screw rotatably connected in the first movable groove and screwed into the second movable seat, and a second motor fixed to one side of the side seat and whose output shaft is connected to the second lead screw.

[0008] Furthermore, the adjustment unit includes two fixed seats symmetrically fixed to one side of the bracket, a first lead screw rotatably connected to the inner wall of one fixed seat, a first guide rod fixed to the inner wall of the other fixed seat, two slide blocks respectively slidably connected to the inner walls of the two fixed seats, and a first motor fixed to the lower end of one fixed seat with its output shaft connected to the first lead screw. The upper ends of the two slide blocks are fixed to the lower end of the first movable seat. The first lead screw is screwed into the inside of one slide block, and the first guide rod is inserted through the inside of the other slide block.

[0009] Furthermore, the first movable seat is also provided with an axial tensioning assembly, which includes two second movable slots symmetrically opened on the upper end of the first movable seat, two pairs of sliders respectively fixed to the lower end of the two alignment pressure seats and slidably connected in the second movable slots, and a bidirectional lead screw rotatably connected in one of the second movable slots and screwed into the interior of the two adjacent sliders. A third motor is fixedly connected to one side of the first movable seat, and the output shaft of the third motor is connected to the bidirectional lead screw.

[0010] Furthermore, a pre-alignment assembly is provided between the two side seats. The pre-alignment assembly includes two third movable slots opened on opposite sides of the two side seats, two slide plates slidably connected in the two third movable slots, a synchronous connecting frame fixed to one side of the two slide plates, a second guide rod fixed in one slide plate, a fourth lead screw rotatably connected in the other slide plate, two mounting brackets slidably connected inside the two slide plates, two pre-pressure rollers rotatably connected to the upper ends of the two mounting brackets respectively, and a fourth motor fixed to one side of one slide plate with its output shaft connected to the fourth lead screw. The two mounting brackets are screwed to the outside of the fourth lead screw at the sliding end of one slide plate and movably sleeved on the outside of the second guide rod at the sliding end of the other slide plate.

[0011] Furthermore, a weld groove for accommodating the weld is provided in the central region outside the preload roller.

[0012] Furthermore, both of the alignment pressure seats have clearance grooves inside, and the synchronous connecting frame passes through the clearance grooves and connects to one side of the two sliding plates.

[0013] Furthermore, one of the side seats is also provided with a follow-up drive assembly, which includes a toothed groove formed on one side of one of the slide plates, a drive gear rotatably connected inside the side seat and meshing with the toothed groove, a first bevel gear rotatably connected inside the side seat and fixed to the upper end of the drive gear, a second bevel gear rotatably connected inside the side seat and meshing with the first bevel gear, a drive rod rotatably connected inside the side seat and connected to the second bevel gear, and a fifth motor fixed to one side of the outer surface of the side seat and whose output shaft is connected to the drive rod.

[0014] Furthermore, it also includes a material pushing assembly disposed on the rear side of the support. The material pushing assembly includes a frame plate fixed to the rear side of the support, a second cylinder fixed to one side of the frame plate, a push plate slidably connected to the inner wall of the frame plate and connected to the telescopic end of the second cylinder, and multiple material pushing rods movably inserted inside the support. One end of each of the multiple material pushing rods is fixed to one side of the push plate, and multiple material guiding rods are fixed to the front side of the bent inner core.

[0015] Furthermore, the bending assembly includes an upper bending section disposed on one side of the bracket above the bending core and two side bending sections symmetrically disposed on one side of the bracket and respectively located on the left and right sides of the bending core. The upper bending section and the two side bending sections each include a fixing plate fixed to one side of the bracket, a first cylinder fixed to one side of the fixing plate, a guide post movably inserted into the fixing plate, and a bending die head fixed to the telescopic end of the first cylinder and one end of the guide post.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The alignment component added in this invention can overcome the problem of springback and misalignment after the plate is bent. Specifically, when the adjustment part drives the first movable seat to rise and fall, the alignment pressure seat directly presses against the plate confluence, thereby ensuring the straightness and consistency of the weld on both sides in terms of physical space before welding, and solving the welding quality problem caused by poor alignment.

[0017] (2) To address the axial warping that is prone to occur in long straight welds, this device utilizes an axial tensioning assembly. The third motor drives the positioning pressure seat to generate a small reverse axial displacement under the pressure state. This action, in conjunction with the aforementioned flattening operation, applies an axial tensile force to the merging gap, forcing the plate at the weld to change from a compressed state to a pre-tensioned state. This not only flattens the gap to be welded but also pre-counters the thermal shrinkage stress during the subsequent welding process.

[0018] (3) To further improve the leveling effect, before the tensioning action is performed, the pre-alignment component moves from the center to the front and rear sides via the pre-pressure roller to pre-level the gap area between the two alignment pressure seats. This action, together with the roller and alignment pressure seat in the aforementioned lateral constraint component, forms a multi-point cooperation, ensuring that multiple areas on the bottom of the board can be fully leveled. In cooperation with the roller and alignment pressure seat in the lateral constraint component, it improves the overall flatness of the bottom of the board and further ensures the flatness of the converging gap.

[0019] (4) The follow-up drive component of this scheme, in conjunction with the fifth motor, enables the pre-pressure roller to move synchronously with the moving trajectory of the welding gun. During the welding process, the area around the weld point is always under the leveling constraint of the pre-pressure roller, which to a certain extent prevents local bulging or misalignment caused by welding thermal deformation, and ensures the stability of the entire welding process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the axial tensioning assembly structure of the present invention; Figure 3 This is a schematic diagram of the confluence alignment component structure of the present invention; Figure 4 This is a schematic diagram of the first and second opening structures of the present invention; Figure 5 This is a schematic diagram of the hollow groove structure of the present invention; Figure 6 This is a schematic diagram of the lateral restraint assembly and axial tensioning assembly of the present invention; Figure 7 This is a schematic diagram of the pre-alignment component structure of the present invention; Figure 8 This is a schematic diagram of the follower drive component structure of the present invention.

[0021] Explanation of the labels in the diagram: 1. Base; 2. Bracket; 21. First opening; 22. Second opening; 3. Upper bending section; 31. Fixing plate; 32. First cylinder; 33. Bending die head; 4. Side bending section; 5. Bending inner core; 51. Feed rod; 6. Welding section; 7. Converging and aligning assembly; 71. Fixed seat; 72. First lead screw; 73. First guide rod; 74. First motor; 75. Slide; 76. First movable seat; 761. Hollowed-out groove; 77. Alignment pressure seat; 771. Alternating groove; 78. Lateral constraint assembly; 781. First movable groove; 782. Second lead screw; 783. Second motor; 784. Second movable seat; 785. Roller body; 786. 8. Side seat; 9. Axial tensioning assembly; 10. Second movable groove; 11. Slider; 12. Bidirectional lead screw; 13. Third motor; 14. Pre-alignment assembly; 15. Third movable groove; 16. Slide plate; 17. Synchronous connecting frame; 18. Second guide rod; 19. Mounting frame; 10. Pre-pressure roller; 10. Weld groove; 11. Fourth motor; 12. Fourth lead screw; 13. Follow-up drive assembly; 14. Gear groove; 15. Drive gear; 16. First bevel gear; 17. Second bevel gear; 18. Drive rod; 19. Fifth motor; 10. Pushing assembly; 111. Frame plate; 112. Second cylinder; 113. Push plate; 114. Top rod. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1 to 8 A bending and welding device that performs bending and welding processes simultaneously includes a base 1, a bracket 2 fixed on the base 1, a bending core 5 and a bending assembly fixed to one side of the bracket 2, a second opening 22 opened inside the bracket 2, and a welding part 6 fixed inside the second opening 22 with the welding gun output end facing below the bending core 5. The welding part 6 consists of a dual-axis motion platform and a welding gun assembly mounted on the moving end of the platform. The height and front-back position of the welding gun assembly can be adjusted by the dual-axis motion platform. For ease of subsequent description of the structure and motion trajectory, the direction parallel to the front-back extension of the base 1 is defined as the Y-axis, and the direction perpendicular to the base 1 and upward is defined as the Z-axis. The dual-axis motion platform and the welding gun assembly are commonly used components in automated welding and belong to mature existing technology, which will not be described in detail here. The bracket 2 is also provided with a converging and aligning assembly 7. The converging and aligning assembly 7 includes a first opening 21 inside the bracket 2, a first movable seat 76 that slides in the first opening 21, a hollow groove 761 inside the first movable seat 76 to facilitate welding with a welding gun, two symmetrically arranged alignment pressure seats 77 on the upper end of the first movable seat 76, two lateral constraint assemblies 78 fixed on the upper end of the first movable seat 76 and located between the two alignment pressure seats 77, and an adjustment part fixed to one side of the bracket 2 for driving the first movable seat 76 to rise and fall. The two alignment pressure seats 77 are used to provide flush constraint at the junction of the two ends of the bent sheet.

[0024] The lateral constraint assembly 78 includes a side seat 786 fixed to the upper end of the first movable seat 76, a first movable groove 781 opened inside the side seat 786, a second movable seat 784 slidably connected in the first movable groove 781, a roller body 785 rotatably connected to the upper end of the second movable seat 784, a second lead screw 782 rotatably connected in the first movable groove 781 and screwed in the second movable seat 784, and a second motor 783 fixed to one side of the side seat 786 and whose output shaft is connected to the second lead screw 782.

[0025] The adjustment unit includes two fixed seats 71 symmetrically fixed to one side of the bracket 2, a first lead screw 72 rotatably connected to the inner wall of one fixed seat 71, a first guide rod 73 fixed to the inner wall of the other fixed seat 71, two slide blocks 75 respectively slidably connected to the inner walls of the two fixed seats 71, and a first motor 74 fixed to the lower end of one fixed seat 71 with its output shaft connected to the first lead screw 72. The upper ends of the two slide blocks 75 are fixed to the lower end of the first movable seat 76. The first lead screw 72 is screwed into the inside of one slide block 75, and the first guide rod 73 is inserted through the inside of the other slide block 75.

[0026] It also includes a pusher assembly 11 disposed on the rear side of the support 2. The pusher assembly 11 includes a frame plate 111 fixed to the rear side of the support 2, a second cylinder 112 fixed to one side of the frame plate 111, a pusher plate 113 slidably connected to the inner wall of the frame plate 111 and connected to the telescopic end of the second cylinder 112, and multiple push rods 114 movably inserted into the inside of the support 2. One end of each of the multiple push rods 114 is fixed to one side of the pusher plate 113. Multiple guide rods 51 are fixed to the front side of the bent inner core 5.

[0027] The bending assembly includes an upper bending part 3 located above the bending core 5 on one side of the support 2 and two side bending parts 4 symmetrically located on one side of the support 2 and respectively on the left and right sides of the bending core 5. The upper bending part 3 and the two side bending parts 4 each include a fixing plate 31 fixed to one side of the support 2, a first cylinder 32 fixed to one side of the fixing plate 31, a guide post movably inserted into the fixing plate 31, and a bending die head 33 fixed to the telescopic end of the first cylinder 32 and one end of the guide post.

[0028] By adopting the above technical solution, the metal sheet to be processed is placed in the middle above the bending core 5. In actual use, when feeding the sheet, two symmetrical baffles can be added to one side of the bracket 2. The two baffles limit the two ends of the sheet, so that the sheet is centered on the bending core 5. Then, the upper bending part 3 is controlled to work, the first cylinder 32 extends and drives the bending die 33 to descend and perform a first bending process on the sheet on the bending core 5. Subsequently, the two side bending parts 4 on the left and right sides work to drive the two bending dies 33 on the left and right sides to move towards the bending core 5 and perform a second bending process on the sheet. After the second bending process, the two ends of the sheet will meet below the bending core 5. At this time, the meeting and alignment component 7 is controlled to work to align the meeting point of the sheet. The specific alignment principle is as follows: The first motor 74 is controlled to operate, driving the first lead screw 72 to rotate. The rotation of the first lead screw 72 drives the slide 75 to move upward, which in turn drives the first movable seat 76 to move upward. The two aligning pressure seats 77 on the first movable seat 76 can press against the junction of the two ends of the plate. The two aligning pressure seats 77 press against the front and rear edge areas of the plate, respectively. Then, the second motor 783 is controlled to operate, driving the second lead screw 782 to rotate. The rotation of the second lead screw 782 drives the second movable seat 784 to move. The two second movable seats 784 move towards each other, driving the roller 785 to move. The roller 785 flattens the gap area between the two aligning pressure seats 77, improving the overall flatness of the plate junction. The two aligning pressure seats 77 and multiple rollers 785 form multi-point constraints, flattening and constraining the misalignment and deformation that occur at the plate junction, improving the straightness of the bottom of the plate. Finally, the welded junction after flattening and constraining is welded together by the welding part 6. After welding is completed, the control assembly 7, upper bending part 3 and side bending part 4 are reset. The second cylinder 112 works to push the push plate 113 to move towards the bracket 2. The push plate 113 drives multiple push rods 114 to extend from the bracket 2. The push rods 114 push the formed part outside the bending inner core 5 from the bending inner core 5 to complete the unloading action.

[0029] like Figure 5 and Figure 6As shown, the first movable seat 76 is also provided with an axial tensioning assembly 8. The axial tensioning assembly 8 includes two second movable slots 81 symmetrically opened on the upper end of the first movable seat 76, two pairs of sliders 82 respectively fixed to the lower end of two alignment pressure seats 77 and slidably connected in the second movable slots 81, and a bidirectional lead screw 83 rotatably connected in one of the second movable slots 81 and screwed into the interior of the two adjacent sliders 82. A third motor 84 is fixedly connected to one side of the first movable seat 76, and the output shaft of the third motor 84 is connected to the bidirectional lead screw 83.

[0030] By adopting the above technical solution, when the merging and alignment component 7 is working and the two alignment pressure seats 77 are pressing on the lower surface of the plate, the control of the third motor 84 drives the bidirectional lead screw 83 to rotate. The rotation of the bidirectional lead screw 83 can drive the two sliders 82 screwed on the bidirectional lead screw 83 to move towards each other or away from each other. When the two sliders 82 move away from each other, the two sliders 82 can drive the two alignment pressure seats 77 to move. When the alignment pressure seats 77 press against the bottom of the plate, the front and rear alignment pressure seats 77 will produce a displacement of 0.1-0.8mm in opposite directions (axial ends). This action can apply an axial tensile force to the merging gap. By performing flattening and straightening double treatment at the merging point, the warping of the long straight weld is eliminated, so that the weld is in a relatively straight state before welding.

[0031] like Figures 6 to 8 As shown, a pre-alignment assembly 9 is also provided between the two side seats 786. The pre-alignment assembly 9 includes two third movable slots 91 opened on opposite sides of the two side seats 786, two slide plates 92 slidably connected in the two third movable slots 91, a synchronous connecting frame 93 fixed to one side of the two slide plates 92, a second guide rod 94 fixed in one slide plate 92, a fourth lead screw 99 rotatably connected in the other slide plate 92, two mounting brackets 95 slidably connected in the two slide plates 92, two pre-pressure rollers 96 rotatably connected to the upper ends of the two mounting brackets 95 respectively, and a fourth motor 98 fixed to one side of one slide plate 92 with its output shaft connected to the fourth lead screw 99. The two mounting brackets 95 are screwed to the sliding end of one slide plate 92 outside the fourth lead screw 99, and movably sleeved to the sliding end of the other slide plate 92 outside the second guide rod 94.

[0032] The preload roller 96 has a weld groove 97 in the middle region outside the preload roller 96 to accommodate the weld.

[0033] Both of the two alignment pressure seats 77 have a clearance groove 771 inside, and the synchronous connecting frame 93 passes through the clearance groove 771 and is connected to one side of the two slide plates 92.

[0034] By adopting the above technical solution, before the two alignment pressure seats 77 press against the lower surface of the plate and the axial tensioning assembly 8 applies axial tension to the plate joint gap, the pre-alignment assembly 9 is controlled to work first. When the pre-alignment assembly 9 works, the fourth motor 98 drives the fourth lead screw 99 to rotate. The rotation of the fourth lead screw 99 drives the two mounting brackets 95 to move towards or away from each other between the two side seats 786. When the two mounting brackets 95 move away from each other, the pre-pressure rollers 96 on the two mounting brackets 95 move. The pre-pressure rollers 96 rotate and contact the workpiece joint gap and move towards the bottom of the plate. Pressure is applied at the bottom of the board, and the two pre-pressure rollers 96 move from the middle of the bottom of the board away from each other and move towards the front and rear sides of the bottom of the board, that is, the two pre-pressure rollers 96 move towards the two alignment pressure seats 77, completing the pressure pre-leveling action at the bottom junction of the board. This can level the area of ​​the bottom of the board located between the two alignment pressure seats 77. First, the bottom of the board is pre-leveled by the pre-alignment component 9, and then an axial tension is applied to the bottom of the board by the axial tension component 8, ensuring that multiple areas of the bottom of the board are fully leveled and ensuring the flatness of the bottom junction gap of the board.

[0035] like Figure 7 and Figure 8 As shown, one of the side seats 786 is also provided with a follow-up drive assembly 10. The follow-up drive assembly 10 includes a toothed groove 101 formed on one side of one of the slide plates 92, a drive gear 102 rotatably connected inside the side seat 786 and meshing with the toothed groove 101, a first bevel gear 103 rotatably connected inside the side seat 786 and fixed to the upper end of the drive gear 102, a second bevel gear 104 rotatably connected inside the side seat 786 and meshing with the first bevel gear 103, a drive rod 105 rotatably connected inside the side seat 786 and connected to the second bevel gear 104, and a fifth motor 106 fixed to one side of the outer surface of the side seat 786 and whose output shaft is connected to the drive rod 105.

[0036] By adopting the above technical solution, when the pre-alignment component 9 drives the two mounting brackets 95 and the two pre-pressure rollers 96 to move in opposite directions to level the bottom junction of the plate, the fourth motor 98 drives the fourth lead screw 99 to rotate. The rotation of the fourth lead screw 99 drives the two mounting brackets 95 to move towards each other, and the two pre-pressure rollers 96 on the two mounting brackets 95 move closer to each other, leaving a distance between the two pre-pressure rollers 96 that is convenient for welding (so that the output end of the welding gun can pass through). The purpose of this is to move the two pre-pressure rollers 96 to the front and rear sides of the welding point, so as to constrain and level the surrounding area of ​​the welding point. During welding, the output end of the welding gun moves to move and weld the gap at the junction. At this time, the fifth motor 106 works to drive the drive rod 105 and the second bevel gear. When wheel 104 rotates, the second bevel gear 104 drives the first bevel gear 103 and the drive gear 102 to rotate. The drive gear 102 drives one of the slide plates 92 to slide in the third movable groove 91. When this slide plate 92 slides, it drives the other slide plate 92 to slide synchronously through the synchronous connecting frame 93. Since the two mounting frames 95 are screwed to the outside of the fourth lead screw 99 inside the slide plate 92, when the two slide plates 92 slide, they will drive the two mounting frames 95 to slide synchronously. When the two mounting frames 95 slide, they will drive the two pre-pressure rollers 96 to slide synchronously, realizing the synchronous movement of the two pre-pressure rollers 96. The two pre-pressure rollers 96 move synchronously and follow the weld point, realizing the following constraint and leveling treatment of the area around the weld point, improving the flatness of the joint gap of the plates during welding. It should be noted that before the start of moving welding, the main control loop controls the dual-axis motion platform and the follow-up drive assembly 10 to perform origin reset and convergence, so that the geometric center of the pre-pressure roller 96 is aligned with the output end of the welding gun in the Y-axis direction and set as the initial zero point of the movement. Subsequently, the fifth motor 106 is connected to the main control circuit of the welding section 6 and receives pulse signals at the same frequency as the welding gun movement platform to ensure that the axial position error between the pre-pressure roller 96 and the welding point is kept within the set tolerance.

[0037] Usage method: First, the metal sheet placed on the bending core 5 is bent multiple times through the upper bending part 3 and the side bending part 4, so that its two ends meet below the bending core 5; then, the meeting and alignment component 7 moves upward, and the alignment pressure seat 77, roller 785 and pre-pressure roller 96 are used to perform multi-point leveling and constraint on the meeting point of the sheet, and a small tension is applied by the axial tension component 8 to eliminate weld warping; during the welding process of the welding part 6, the follow-up drive component 10 drives the pre-pressure roller 96 to move synchronously with the weld point to ensure continuous flatness; after the welding is completed, the pusher component 11 pushes the finished product off the bending core 5.

[0038] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A bending and welding device that performs bending and welding processes simultaneously, comprising a base (1), a bracket (2) fixed on the base (1), a bending core (5) and a bending assembly fixed to one side of the bracket (2), a second opening (22) opened inside the bracket (2), and a welding part (6) fixed inside the second opening (22) with the welding torch output end facing below the bending core (5), characterized in that: The bracket (2) is also provided with a convergence and alignment assembly (7). The convergence and alignment assembly (7) includes a first opening (21) opened inside the bracket (2), a first movable seat (76) slidably connected in the first opening (21), a hollow groove (761) opened inside the first movable seat (76) to facilitate welding with a welding gun, two symmetrically arranged upper end of the first movable seat (76) and two lateral constraint assemblies (78) fixed to the upper end of the first movable seat (76) and located between the two lateral constraint seats (77), and an adjustment part fixed to one side of the bracket (2) and driven by a screw transmission mechanism to raise and lower the first movable seat (76). The two alignment pressure seats (77) abut against the surface of the plate by lifting and lowering to provide flush constraint at the junction of the two bent ends of the plate.

2. The bending and welding device according to claim 1, characterized in that: The lateral restraint assembly (78) includes a side seat (786) fixed to the upper end of the first movable seat (76), a first movable groove (781) opened inside the side seat (786), a second movable seat (784) slidably connected in the first movable groove (781), a roller (785) rotatably connected to the upper end of the second movable seat (784), a second lead screw (782) rotatably connected in the first movable groove (781) and screwed in the second movable seat (784), and a second motor (783) fixed to one side of the side seat (786) and whose output shaft is connected to the second lead screw (782).

3. The bending and welding device according to claim 1, characterized in that: The adjustment unit includes two fixed seats (71) symmetrically fixed to one side of the bracket (2), a first lead screw (72) rotatably connected to the inner wall of one fixed seat (71), a first guide rod (73) fixed to the inner wall of the other fixed seat (71), two slides (75) respectively slidably connected to the inner walls of the two fixed seats (71), and a first motor (74) fixed to the lower end of one fixed seat (71) and whose output shaft is connected to the first lead screw (72). The upper ends of the two slides (75) are fixed to the lower end of the first movable seat (76). The first lead screw (72) is screwed into the inside of one slide (75), and the first guide rod (73) is inserted through the inside of the other slide (75).

4. A bending and welding device for simultaneous bending and welding processes according to claim 1, characterized in that: The first movable seat (76) is also provided with an axial tensioning assembly (8). The axial tensioning assembly (8) includes two second movable slots (81) symmetrically opened on the upper end of the first movable seat (76), two pairs of sliders (82) respectively fixed to the lower end of two alignment pressure seats (77) and slidably connected in the second movable slots (81), and a bidirectional lead screw (83) rotatably connected in one of the second movable slots (81) and screwed inside the two adjacent sliders (82). A third motor (84) is fixedly connected to one side of the first movable seat (76), and the output shaft of the third motor (84) is connected to the bidirectional lead screw (83).

5. A bending and welding device for simultaneous bending and welding processes according to claim 2, characterized in that: A pre-alignment assembly (9) is also provided between the two side seats (786). The pre-alignment assembly (9) includes two third movable slots (91) opened on opposite sides of the two side seats (786), two slide plates (92) slidably connected in the two third movable slots (91), a synchronous connecting frame (93) fixed to one side of the two slide plates (92), a second guide rod (94) fixed in one slide plate (92), a fourth lead screw (99) rotatably connected in the other slide plate (92), two mounting brackets (95) slidably connected in the two slide plates (92), two pre-pressure rollers (96) rotatably connected to the upper ends of the two mounting brackets (95), and a fourth motor (98) fixed to one side of one slide plate (92) with its output shaft connected to the fourth lead screw (99). The sliding ends of the two mounting brackets (95) and one slide plate (92) are screwed to the outside of the fourth lead screw (99), and the sliding ends of the other slide plate (92) are movably sleeved on the outside of the second guide rod (94).

6. A bending and welding device for simultaneous bending and welding processes according to claim 5, characterized in that: The preload roller (96) has a weld groove (97) in the middle region outside the roller to accommodate the weld.

7. A bending and welding device for simultaneous bending and welding processes according to claim 6, characterized in that: Both of the two alignment pressure seats (77) have a relief groove (771) inside. The synchronous connecting frame (93) passes through the relief groove (771) and is connected to one side of the two sliding plates (92).

8. A bending and welding device for simultaneous bending and welding processes according to claim 5, characterized in that: One of the side seats (786) is also provided with a follow-up drive assembly (10). The follow-up drive assembly (10) includes a toothed groove (101) opened on one side of one of the slide plates (92), a drive gear (102) rotatably connected to the inside of the side seat (786) and meshing with the toothed groove (101), a first bevel gear (103) rotatably connected to the inside of the side seat (786) and fixed to the upper end of the drive gear (102), a second bevel gear (104) rotatably connected to the inside of the side seat (786) and meshing with the first bevel gear (103), a drive rod (105) rotatably connected to the inside of the side seat (786) and connected to the second bevel gear (104), and a fifth motor (106) fixed to one side of the outer surface of the side seat (786) and whose output shaft is connected to the drive rod (105).

9. A bending and welding device for simultaneous bending and welding processes according to claim 1, characterized in that: It also includes a pusher assembly (11) disposed on the rear side of the support (2). The pusher assembly (11) includes a frame plate (111) fixed to the rear side of the support (2), a second cylinder (112) fixed to one side of the frame plate (111), a pusher plate (113) slidably connected to the inner wall of the frame plate (111) and connected to the telescopic end of the second cylinder (112), and multiple push rods (114) movably inserted into the support (2). One end of each of the multiple push rods (114) is fixed to one side of the pusher plate (113), and multiple guide rods (51) are fixed to the front side of the bent inner core (5).

10. A bending and welding device for simultaneous bending and welding processes according to claim 1, characterized in that: The bending assembly includes an upper bending part (3) located above the bending core (5) on one side of the bracket (2) and two side bending parts (4) symmetrically arranged on one side of the bracket (2) and located on the left and right sides of the bending core (5). The upper bending part (3) and the two side bending parts (4) each include a fixing plate (31) fixed to one side of the bracket (2), a first cylinder (32) fixed to one side of the fixing plate (31), a guide post movably inserted into the fixing plate (31), and a bending die head (33) fixed to the telescopic end of the first cylinder (32) and one end of the guide post.

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