A welding anti-deformation device

Abstract

The present invention relates to the field of welding processing technology, and specifically discloses a welding anti-deformation device, including a pre-deformation gantry, a clamping assembly and a pre-deformation assembly. Specifically: the clamping assembly is installed on the pre-deformation gantry, and two pre-deformation assemblies are provided, and are respectively arranged on two symmetrical sides below the pre-deformation gantry, and include a mounting frame, a mounting plate, a lifting arm, a lifting member, a connecting plate, a first driving member and a displacement sensor. The mounting plate is fixedly connected to the lifting arm, and the connecting plate is arranged parallel to the top of the mounting plate, and the surfaces of the connecting plate and the mounting plate facing each other are respectively provided with a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface are parallel to each other, and the first driving member is connected to one end of the connecting plate. A welding anti-deformation device of the present invention applies deformation compensation in advance before welding the thin plate longitudinal frame, and under the action of welding deformation, the thin plate automatically rebounds to the initial state to solve the problem of difficult control and correction of welding deformation.

Description

Technical Field

[0001] The invention relates to the technical field of welding processing, and in particular to a welding anti-deformation device. Background Art

[0002] In the process of shipbuilding, welding accounts for about 35% of the total workload. Ships have high requirements for steel plate welding, especially for deformation control after welding. During the welding process, due to the effect of welding heat cycle, large steel plates will produce a lot of deformation after welding. If it is not controlled, it will eventually affect the overall construction quality of the ship and even affect the safe operation of the ship. At present, the traditional solution to welding deformation is to correct it by fire attack after welding, or to adjust the welding sequence during welding. The former will increase costs and extend the shipbuilding cycle, and the latter control effect is not particularly obvious. Therefore, how to control the deformation during the welding of large thin plate longitudinal bones is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The present invention aims to solve at least one of the above-mentioned technical problems and provide a welding anti-deformation device to apply deformation compensation in advance before welding of thin plate longitudinal bones to solve the problems of difficult control and correction of welding deformation mentioned in the above background.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: a welding anti-deformation device, comprising:

[0005] Pre-deformed gantry,

[0006] A clamping assembly, which is mounted on the pre-deformation portal frame and is used to clamp the thin plate longitudinal bones to be welded;

[0007] The pre-deformation components are provided with two and are respectively arranged on both sides symmetrically below the pre-deformation portal, and include a mounting frame, a mounting plate, a lifting arm, a lifting member, a connecting plate, a first driving member and a displacement sensor. The mounting plate is fixedly connected to the lifting arm, the connecting plate is arranged parallel to the top of the mounting plate, and the surfaces of the connecting plate and the mounting plate facing each other are respectively provided with a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface are parallel to each other, the first driving member is connected to one end of the connecting plate, and can drive the connecting plate to move in a horizontal direction to adjust the vertical distance between the first inclined surface and the second inclined surface, and the displacement sensor is used to detect the horizontal movement distance of the connecting plate.

[0008] Preferably, the pre-deformed portal frame includes a column assembly, a beam hinge assembly and a beam assembly.

[0009] Preferably, the clamping assembly includes a fixed clamping assembly fixedly mounted on the pre-deformation gantry, and a movable clamping assembly movably mounted on the pre-deformation gantry. A plurality of fixed clamping assemblies are provided, and they are arranged in sequence along the length direction of the pre-deformation gantry. The movable clamping assembly can be moved and adjusted along the length direction of the pre-deformation gantry.

[0010] Preferably, the fixed clamping assembly includes a hydraulic cylinder, a connecting seat, a spring, a clamping seat and a clamping block, the cylinder body of the hydraulic cylinder is fixedly mounted on the pre-deformation gantry, the piston rod of the hydraulic cylinder is fixedly connected to the connecting seat, the clamping seat is elastically connected to the connecting seat through a spring, and the clamping block is fixedly mounted on the bottom surface of the clamping seat.

[0011] Preferably, the movable clamping assembly may include a machine base, and a sliding mechanism and a clamping mechanism arranged on the machine base. A slide rail is horizontally arranged on the pre-deformation gantry. The sliding mechanism includes multiple groups of guide assemblies, rollers and a motor. Each group of guide assemblies includes guide bearings that can respectively roll with the upper and lower surfaces of the slide rails. The rollers roll with the lower surface of the slide rails. The motor is connected to the rollers in a transmission manner so as to drive the rollers to roll along the slide rails. The clamping mechanism includes a hydraulic cylinder, a swing arm and a movable pressure head. One end of the swing arm is hinged to the machine base, and the other end is hinged to the movable pressure head. One end of the hydraulic cylinder is hinged to the machine base, and the piston rod at the other end is hinged to the middle part of the swing arm.

[0012] Preferably, the pre-deformation assembly also includes a universal ball support assembly and an electromagnet assembly, the universal ball support assembly includes a plurality of universal balls horizontally rotatably mounted on a mounting frame, and the electromagnet assembly includes an electromagnet and a second driving member, and the second driving member can drive the electromagnet to move in a vertical direction.

[0013] Preferably, connecting rods are symmetrically and vertically fixedly installed on both sides of the mounting plate, and the upper ends of the connecting rods are connected to the jacking arms.

[0014] Preferably, the lower surface of the connecting plate and the upper surface of the mounting plate are respectively fixedly mounted with a first wedge block and a second wedge block, and the first inclined surface and the second inclined surface are respectively arranged on two surfaces of the first wedge block and the second wedge block facing each other.

[0015] Preferably, the pre-deformation assembly also includes a connecting beam, one end of which is fixedly connected to the jacking arm, and the other end is hinged to a hinge seat arranged on the mounting frame, and the upper end of the connecting rod is hinged to the middle part of the connecting beam.

[0016] Preferably, the driving member is a hydraulic cylinder, one end of the displacement sensor is connected to the cylinder body of the hydraulic cylinder, and the other end is connected to the piston rod of the hydraulic cylinder.

[0017] The beneficial effect is as follows: compared with the prior art, a welding anti-deformation device of the present invention presses the thin plate longitudinal bone to be welded by a clamping assembly, and then pushes the lifting arm upward through the lifting member, so that the lifting arm can lift up the deformed part of the thin plate longitudinal bone by welding to apply deformation compensation to the plate; when the first inclined surface abuts the second inclined surface, the upward movement of the lifting arm can be limited, so that the lifting arm cannot continue to lift upward; therefore, the connecting plate is pushed to move in the horizontal direction by the driving member, and the vertical distance between the first inclined surface and the second inclined surface can be changed, so as to adjust the anti-deformation amount applied by the lifting arm; and the horizontal movement distance of the connecting plate can be accurately detected by the displacement sensor, so as to realize accurate control of the anti-deformation amount, and deformation compensation can be applied in advance before the thin plate longitudinal bone is welded; under the action of welding deformation, the thin plate automatically rebounds to the initial state, so as to solve the problem of difficult deformation control and correction during the welding process of the thin plate longitudinal bone. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 This is a structural schematic diagram of a welding anti-deformation device of the present application;

[0020] Figure 2 It is a structural schematic diagram of a fixed pressing assembly;

[0021] Figure 3 It is a structural schematic diagram of a movable clamping assembly;

[0022] Figure 4 It is a schematic diagram of the installation structure of the electromagnet assembly;

[0023] Figure 5 It is a schematic diagram of the installation structure of the universal ball support assembly;

[0024] Figure 6 It is a schematic diagram of the installation structure of the pre-deformation component;

[0025] Figure 7 A schematic diagram of the structure of a part of a pre-deformation component;

[0026] Figure 8 for Figure 7 A schematic diagram of the structure from another perspective;

[0027] Fig. 9 Schematic diagram of the structure of the thin plate longitudinal bone to be welded. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is referred to as being "set in the middle", it does not only mean being set in the middle, as long as it is not set in the range defined by both ends belonging to the middle. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] like Figures 1 to 8 As shown, a welding anti-deformation device includes a pre-deformation gantry, a clamping assembly and a pre-deformation assembly, specifically:

[0032] The pre-deformed door frame includes a column assembly 10, a crossbeam hinge assembly 11 and a crossbeam assembly 12. The crossbeam assembly 12 is horizontally arranged, and the column assembly 10 is vertically arranged, and two are arranged. The bottom end of the column assembly 10 is fixedly connected to the ground, and the crossbeam hinge assembly 11 connects the two ends of the crossbeam assembly 12 to the top ends of the two column assemblies 10 respectively.

[0033] A clamping assembly, which is mounted on the pre-deformation portal frame and is used to clamp the thin plate longitudinal bones to be welded;

[0034] The pre-deformation assembly is provided with two, and is respectively arranged on both sides symmetrically below the pre-deformation portal, and includes a mounting frame 1, a mounting plate 2, a lifting arm 3, a lifting member 4, a connecting plate 5, a first driving member 6 and a displacement sensor 7. The mounting plate 2 is fixedly connected to the lifting arm 3, and the connecting plate 5 is arranged parallel to the top of the mounting plate 2, and the surfaces of the connecting plate 5 and the mounting plate 2 facing each other are respectively provided with a first inclined surface 8 and a second inclined surface 9, and the first inclined surface 8 and the second inclined surface 9 are parallel to each other. The first driving member 6 is connected to one end of the connecting plate 5, and can drive the connecting plate 5 to move in the horizontal direction to adjust the vertical distance between the first inclined surface 8 and the second inclined surface 9. The displacement sensor 7 is used to detect the horizontal movement distance of the connecting plate 5. When the mounting plate 2 moves toward the connecting plate 5 and the first inclined surface 8 abuts against the second inclined surface 9, the mounting plate 2 cannot continue to move upward relative to the connecting plate 5, thereby limiting the upward movement of the lifting arm 3.

[0035] During the welding process of the thin plate longitudinal bone, the thin plate will produce downward deformation. Therefore, before welding, the deformed part is applied with an upward anti-deformation in advance to compensate, so that the thin plate automatically rebounds to the initial state under the action of welding deformation. A welding anti-deformation device of the present invention presses the thin plate longitudinal bone to be welded by a clamping assembly, and then pushes the lifting arm 3 to move upward through the lifting member 4, so that the lifting arm 3 can lift the part of the thin plate longitudinal bone that is deformed by welding upward to apply deformation compensation to the plate. When the first inclined surface 8 abuts against the second inclined surface 9, the upward movement of the lifting arm 3 can be limited, so that the lifting arm 3 cannot continue to lift upward. Therefore, the connecting plate 5 is pushed to move in the horizontal direction by the driving member, and the vertical distance between the first inclined surface 8 and the second inclined surface 9 can be changed, so as to adjust the anti-deformation applied to the lifting arm 3, and the horizontal movement distance of the connecting plate 5 can be accurately detected by the displacement sensor 7, so as to accurately apply the deformation compensation, so as to solve the problem of difficult deformation control and correction during the welding process of the thin plate longitudinal bone.

[0036] In one embodiment, the clamping assembly may include a fixed clamping assembly 13 fixedly mounted on the pre-deformation portal frame, and a movable clamping assembly 14 movably mounted on the pre-deformation portal frame. A plurality of fixed clamping assemblies 13 are provided, and are arranged in sequence along the length direction of the pre-deformation portal frame. The movable clamping assembly 14 can be moved and adjusted along the length direction of the pre-deformation portal frame. When applying the reverse deformation compensation, the thin plate longitudinal bones to be welded need to be clamped. Since the thin plate longitudinal bones are long, multiple fixed clamping assemblies 13 are required to clamp different positions in the length direction of the thin plate longitudinal bones. However, the fixed clamping assemblies 13 are fixedly arranged, and there is a certain distance between two adjacent fixed clamping assemblies 13. For example, when three fixed clamping assemblies 13 cannot effectively clamp the thin plate longitudinal bones, and four fixed clamping assemblies 13 cannot clamp the thin plate longitudinal bones at the same time, the movable clamping assembly 14 can be moved to a suitable position to cooperate with the fixed clamping assembly 13 to clamp the thin plate longitudinal bones to improve the stability of the clamping of the thin plate longitudinal bones.

[0037] Specifically, the fixed clamping assembly 13 may include a hydraulic cylinder 15, a connecting seat 16, a spring 17, a clamping seat 18 and a clamping block 19. The cylinder body of the hydraulic cylinder 15 may be fixedly mounted on the pre-deformed gantry through a fixing plate. The piston rod of the hydraulic cylinder 15 is fixedly connected to the connecting seat 16. The clamping seat 18 is elastically connected to the connecting seat 16 through a spring 17. The clamping block 19 is fixedly mounted on the bottom surface of the clamping seat 18. The connecting seat 16 is driven downward by the hydraulic cylinder 15, thereby driving the clamping block 19 on the clamping seat 18 to move downward, thereby The thin plate longitudinal bone is compressed. Preferably, a guide cylinder can be provided on the fixed plate, and a guide rod that slides with the guide cylinder is provided on the connecting seat 16, so as to improve the stability of the movement of the connecting seat 16. The two sides of the compression seat 18 can be connected to the connecting seat 16 by a spring 17, so that the connecting seat 16 can play a certain buffering role in the process of driving the compression seat 18 to press down, and a guide cylinder can also be provided on the connecting seat 16, and a guide rod that slides with the guide cylinder is provided on the compression seat 18, so as to improve the stability of the movement of the compression seat 18.

[0038] More specifically, the movable clamping assembly 14 may include a machine base 20, and a sliding mechanism and a clamping mechanism arranged on the machine base 20. A slide rail 21 is horizontally arranged on the pre-deformation gantry. The sliding mechanism includes multiple groups of guide assemblies, rollers 22 and motors 23. Each group of guide assemblies includes guide bearings 24 that can respectively roll with the upper and lower surfaces of the slide rail 21. The roller 22 rolls with the lower surface of the slide rail 21. The motor 23 is connected to the roller 22 in a transmission connection so as to drive the roller 22 to roll along the slide rail 21. The clamping mechanism includes a hydraulic cylinder 15, a swing arm 25 and a movable pressure head 26. One end of the swing arm 25 is hinged to the machine base 20, and the other end is hinged to the movable pressure head 26. One end of the hydraulic cylinder 15 is hinged to the machine base 20, and the piston rod at the other end is hinged to the middle part of the swing arm 25. Specifically, the slide rail 21 is in the shape of a plate and is fixedly mounted on the cross beam. Guide assemblies are arranged on both sides of the machine base 20 at the front end and the rear end. The gap between the two guide bearings 24 of the guide assembly matches the thickness of the slide rail 21. The guide assembly cooperates with the slide rail 21, so that the machine base 20 can be stably mounted on the cross beam. At the same time, the motor 23 drives the roller 22 to rotate, so that the machine base 20 can drive the clamping mechanism to move and adjust the positioning along the length direction of the cross beam, and sensing devices are also arranged at both ends of the cross beam. When the machine base 20 moves to the two end positions of the cross beam, the sensing device can control the machine base 20 to stop moving, so as to limit the movement of the machine base 20. When the machine base 20 moves to the desired position, the hydraulic cylinder 15 drives the swing arm 25 to swing downward, thereby driving the movable pressure head 26 to move downward, thereby pressing the thin plate longitudinal bone.

[0039] The pre-deformation assembly also includes a universal ball support assembly and an electromagnet assembly. The universal ball support assembly includes a plurality of universal balls 27 mounted on the mounting frame 1 and can be rotated horizontally. The electromagnet assembly includes an electromagnet 28 and a second driving member 29. The second driving member 29 can drive the electromagnet 28 to move in the vertical direction. Specifically, the second driving member 29 can be an airbag and is mounted on the mounting frame 1. In order to improve the stability of the airbag installation, a U-shaped groove can be provided on the mounting frame 1, and the airbag is set in the U-shaped groove. Fig. 9As shown, the thin plate longitudinal bone includes a first plate body arranged horizontally and a second plate body arranged vertically on the upper surface of the first plate body. When the reverse deformation is applied, the electromagnet 28 is driven to move upward by the second driving member 29, so that the electromagnet 28 abuts against the bottom surface of the first plate body, and then the electromagnet 28 is energized so that the electromagnet 28 generates a magnetic force to firmly adsorb and fix the bottom surface of the first plate body, and then pressure is applied to the top of the second plate body through the clamping assembly to clamp the thin plate longitudinal bone. After the reverse deformation work is completed, the clamping assembly is lifted and the electromagnet 28 is de-energized, and then the second driving member 29 drives the electromagnet to move downward, so that the clamping assembly is separated from the second plate body, and the electromagnet 28 is separated from the first plate body. The thin plate longitudinal bone is supported by the universal ball 27 installed on the mounting frame 1, so as to push the thin plate longitudinal bone to the welding station.

[0040] Connecting rods 30 can be symmetrically and vertically fixedly installed on both sides of the mounting plate 2. The bottom end of the connecting rod 30 is detachably fixedly connected to the mounting plate 2 by bolts, and the upper end of the connecting rod 30 is connected to the jacking arm 3, thereby connecting the mounting plate 2 and the jacking arm 3.

[0041] Preferably, the pre-deformation assembly of the present application may further include a guide block, which slides with both sides of the connecting plate 5 to limit the horizontal movement of the connecting plate 5. Specifically, the guide block can be fixed on the mounting frame 1 by bolts, and the guide block has a groove body that matches the width of the connecting plate 5. When the connecting plate 5 moves, the guide block slides with the connecting plate 5 through the groove body, thereby limiting the connecting plate 5, so that the connecting plate 5 can maintain stable movement along its length direction, thereby improving the stability of the movement of the connecting plate 5.

[0042] In another embodiment, the lower surface of the connecting plate 5 and the upper surface of the mounting plate 2 can be detachably fixed with the first wedge block 31 and the second wedge block 32 by bolts, respectively. The first inclined surface 8 and the second inclined surface 9 are respectively arranged on the two surfaces of the first wedge block 31 and the second wedge block 32 facing each other. The first inclined surface 8 and the second inclined surface 9 are respectively arranged on the first wedge block 31 and the second wedge block 32 to facilitate processing and production.

[0043] In one preferred embodiment, the pre-deformation assembly of the present application may further include a connecting beam 33, one end of the connecting beam 33 is fixedly connected to the jacking arm 3, and the other end is hinged to a hinge seat arranged on the mounting frame 1, the upper end of the connecting rod 30 is hinged to the middle part of the connecting beam 33, and the jacking arm 3 is rotatably connected to the hinge seat through the connecting beam 33, thereby improving the stability of the movement of the jacking arm 3. Specifically, a mounting hole is provided in the middle part of the connecting beam 33, and a rotating seat is provided in the mounting hole. The upper ends of the two connecting rods 30 can be fixedly connected to the rotating seat by bolts, and the two ends of the rotating seat are rotatably connected to the two side walls of the mounting hole through a rotating shaft, thereby realizing the hinge connection between the connecting rod 30 and the connecting beam 33.

[0044] In the present application, the lifting member 4 can adopt a variety of implementations. In one implementation, the lifting member 4 can adopt a cylinder or a hydraulic cylinder, and the lifting arm 3 can be driven to move up and down by controlling the extension and contraction of the cylinder or hydraulic cylinder piston rod. In a more preferred implementation, the lifting member 4 can be an airbag, and the airbag can be inflated or deflated to drive the lifting arm 3 to move up and down. By driving the lifting arm 3 with the airbag, a greater driving force can be applied. Furthermore, a U-shaped mounting groove is provided under the lifting arm 3, and the mounting groove can be fixedly installed on the mounting frame 1. The airbag is arranged in the mounting groove, so as to limit the airbag and improve the stability of the airbag installation.

[0045] In a more preferred embodiment, the driving member can be a hydraulic cylinder, and a mounting seat is provided at the head of the hydraulic cylinder piston rod. The mounting seat is detachably fixed to one end of the connecting plate 5 by bolts. One end of the displacement sensor 7 is connected to the cylinder body of the hydraulic cylinder, and the other end is connected to the mounting seat. The displacement sensor 7 detects the displacement of the piston rod, thereby detecting the displacement of the connecting plate 5 in the horizontal direction, thereby facilitating the control of the movement of the connecting plate 5 in the horizontal direction.

[0046] When the welding anti-deformation device of the present application is in use, the first plate body and the second plate body are assembled into a T-shaped thin plate longitudinal bone and then transported to the bottom of the pre-deformation door frame, and the thin plate longitudinal bone is supported by the universal ball support assembly, and then the second driving member 29 drives the electromagnet 28 to move upward, so that the electromagnet 28 abuts against the bottom surface of the first plate body, and then the electromagnet 28 is energized so that the electromagnet 28 generates a magnetic force to firmly adsorb and fix the bottom surface of the first plate body, and then pressure is applied to the top of the second plate body through the clamping assembly, so as to press the thin plate longitudinal bone, so that the first plate body and the second plate body are tightly fitted, and then the connecting plate 5 is pushed to move in the horizontal direction by the driving member 6 to adjust the first The vertical distance between the inclined surface 8 and the second inclined surface 9, and then the lifting member 4 drives the lifting arm 3 to move upward, so that the lifting arm 3 lifts the welding deformed part of the thin plate longitudinal bone upward to apply deformation compensation to the thin plate longitudinal bone. After the lifting arm 3 moves to the required position, it stops moving, and the welding robot performs welding processing on the thin plate longitudinal bone. After the welding processing is completed, the lifting member 4 drives the lifting arm 3 to return to the initial position, so that the electromagnet 28 is powered off and the clamping assembly is lifted. Then the second driving member 29 drives the electromagnet 28 to move downward, so that the clamping assembly is separated from the second plate body, and the electromagnet 28 is separated from the first plate body, and finally the thin plate longitudinal bone is transported to the next process for processing.

[0047] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Any modification or equivalent substitution that does not depart from the spirit and scope of the present invention shall be included in the scope of the technical solution of the present invention.

Claims

1. A welding anti-deformation device, characterized in that: include: Pre-deformed gantry, A clamping assembly is mounted on a pre-deformed portal frame and is used to clamp a thin plate longitudinal bone to be welded. The clamping assembly comprises a fixed clamping assembly (13) fixedly mounted on the pre-deformed portal frame and a movable clamping assembly (14) movably mounted on the pre-deformed portal frame. A plurality of fixed clamping assemblies (13) are provided and are arranged in sequence along the length direction of the pre-deformed portal frame. The movable clamping assembly (14) can be moved and adjusted along the length direction of the pre-deformed portal frame. The fixed clamping assembly (13) comprises a hydraulic cylinder (15), a connecting seat (16), a spring (17), a clamping seat (18) and a clamping block (19). The cylinder body of the hydraulic cylinder (15) is fixedly mounted on the pre-deformed portal frame. The piston rod of the hydraulic cylinder (15) is fixedly connected to the connecting seat (16). The clamping seat (18) is elastically connected to the connecting seat (16) via the spring (17). The clamping block (19) is fixedly mounted on the clamping seat (18) ), the movable pressing assembly (14) comprises a machine base (20), and a sliding mechanism and a pressing mechanism arranged on the machine base (20), a slide rail (21) is horizontally arranged on the pre-deformation door frame, the sliding mechanism comprises a plurality of guide assemblies, rollers (22) and a motor (23), each guide assembly comprises a guide bearing (24) capable of rolling with the upper and lower surfaces of the slide rail (21), the rollers (22) and the lower surfaces of the slide rail (21) are respectively The motor (23) is connected to the roller (22) in a transmission manner so as to drive the roller (22) to roll along the slide rail (21). The clamping mechanism comprises a hydraulic cylinder (15), a swing arm (25) and a movable pressure head (26). One end of the swing arm (25) is hinged to the machine base (20), and the other end is hinged to the movable pressure head (26). One end of the hydraulic cylinder (15) is hinged to the machine base (20), and the piston rod at the other end is hinged to the middle part of the swing arm (25). The pre-deformation assembly is provided with two of them and is respectively arranged on two symmetrical sides below the pre-deformation gantry. The pre-deformation assembly comprises a mounting frame (1), a mounting plate (2), a lifting arm (3), a lifting member (4), a connecting plate (5), a first driving member (6) and a displacement sensor (7). The mounting plate (2) is fixedly connected to the lifting arm (3). The connecting plate (5) is arranged parallel to the mounting plate (2). The surfaces of the connecting plate (5) and the mounting plate (2) facing each other are respectively provided with a first inclined surface (8) and a second inclined surface (9). The first inclined surface (8) and the second inclined surface (9) are parallel to each other. The first driving member (6) is connected to one end of the connecting plate (5) and is capable of driving the connecting plate (5) to move in a horizontal direction so as to adjust the vertical distance between the first inclined surface (8) and the second inclined surface (9). The displacement sensor (7) is used to detect the horizontal movement distance of the connecting plate (5).

2. A welding anti-deformation device according to claim 1, characterized in that: The pre-deformed portal frame comprises a column assembly (10), a crossbeam hinge assembly (11) and a crossbeam assembly (12).

3. A welding anti-deformation device according to claim 1, characterized in that: The pre-deformation assembly also includes a universal ball support assembly and an electromagnet assembly. The universal ball support assembly includes a plurality of universal balls (27) mounted on the mounting frame (1) in a horizontally rotatable manner. The electromagnet assembly includes an electromagnet (28) and a second driving member (29). The second driving member (29) can drive the electromagnet (28) to move in a vertical direction.

4. A welding anti-deformation device according to claim 1, characterized in that: Connecting rods (30) are symmetrically and vertically fixedly installed on both sides of the mounting plate (2), and the upper ends of the connecting rods (30) are connected to the lifting arms (3).

5. The welding anti-deformation device according to claim 1, characterized in that: A first wedge block (31) and a second wedge block (32) are fixedly mounted on the lower surface of the connecting plate (5) and the upper surface of the mounting plate (2), respectively, and a first inclined surface (8) and a second inclined surface (9) are respectively arranged on two surfaces of the first wedge block (31) and the second wedge block (32) facing each other.

6. A welding anti-deformation device according to claim 4, characterized in that: The pre-deformation assembly also includes a connecting beam (33), one end of which is fixedly connected to the lifting arm (3), and the other end of which is hinged to a hinge seat arranged on the mounting frame (1); the upper end of the connecting rod (30) is hinged to the middle part of the connecting beam (33).

7. The welding anti-deformation device according to claim 1, characterized in that: The driving member is a hydraulic cylinder, one end of the displacement sensor (7) is connected to the cylinder body of the hydraulic cylinder, and the other end is connected to the piston rod of the hydraulic cylinder.

Images