Welding deformation pre-control device of H-shaped steel assembling, welding and correcting all-in-one machine

Abstract

The invention discloses a welding deformation pre-control device of an H-shaped steel assembling, welding and correcting all-in-one machine, and relates to the technical field of H-shaped steel welding, the welding deformation pre-control device comprises a welding table and a workpiece, and further comprises a deformation pre-control mechanism connected with the welding table and used for performing deformation control on the workpiece before welding; the deformation pre-control mechanism is installed to pre-control a wing plate and a web plate before welding, deformation of the wing plate and the web plate is controlled in the welding process, correction is not needed through pre-control over the web plate and the wing plate, and the H-shaped steel machining efficiency and the H-shaped steel machining quality are improved; the upper pressing combination mode is changed by installing the web side pressing limiting mechanism, pressure is applied from the side face, the workpiece machining stability is guaranteed in the welding process, the situation that a workpiece inclines due to upper pressing is avoided, and the workpiece machining quality is guaranteed; and heat generated in the welding process is reduced by installing the staggered welding mechanism, the deformation amplitude is reduced, the cooling speed is increased, and the machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of H-beam welding, and in particular to a welding deformation pre-control device for an H-beam assembly welding and straightening machine. Background Art

[0002] In the prior art, there is an H-beam welding and straightening machine with an asynchronous positioning device, such as the authorization announcement number: CN222113956U, which belongs to the technical field of H-beam welding and straightening machines, and comprises: a fixed frame, a cylinder is fixedly installed on the top of the fixed frame, and a U-frame is fixedly installed on the output end of the cylinder; top pressure wheels are rotatably installed on the inner walls of both sides of the U-frame, and an asynchronous component, wherein the asynchronous component comprises: two groups of threaded rods, the threaded rods on the left side are rotatably installed inside one side of the fixed frame, and connecting rods are fixedly installed on the sides of the two groups of connecting columns close to each other, which can effectively limit H-beam groups of different sizes to prevent deviation during the transmission process, which is beneficial to the later transmission welding and straightening of the H-beam group, and realizes the effective positioning of the H-beam group that needs welding and straightening, and prevents deviation during welding and straightening, making it reliable and safe, and achieving the purpose of asynchronous positioning.

[0003] Although the above scheme has the above advantages, the disadvantage of the above scheme is that in the prior art, the top of the web is pressed by a concave pressing wheel in the middle when the H-shaped steel is welded, so that the bottom of the web is in close contact with the bottom of the wing. In this way, when the first wing is welded to the web, the web can be directly located in the concave position of the pressing wheel, so that the web and the wing are in close contact with each other stably. However, when welding another wing, the welded wing and web are T-shaped, so the top of the first wing is in direct contact with the pressing wheel. The semi-finished T-shaped steel structure is easy to tilt during the welding process, resulting in tilt and gaps in the welding between the web and the lower wing, affecting the welding quality. Moreover, the correction in the prior art is performed while welding, and the deformation is a long process, so the wing plate will still have a certain deformation, and further correction is required in the later stage, which affects the correction efficiency; Moreover, the welding in the prior art is performed on both sides simultaneously, and the heat of the welding is high, which is more likely to cause deformation of the plate. Summary of the invention

[0004] The present invention provides a welding deformation pre-control device for an H-beam assembly welding and straightening machine to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A welding deformation pre-control device for an H-beam assembly welding and straightening machine, comprising a welding table and a workpiece, and also comprising: A deformation pre-control mechanism, which is connected to the welding table and is used to control the deformation of the workpiece before welding; A staggered welding mechanism, which is connected to the deformation pre-control mechanism and is used for staggered welding of two sides of the web; A driving mechanism, which is connected to the staggered welding mechanism and is used to drive the staggered welding mechanism and the deformation pre-control mechanism to operate; The web side pressure limiting mechanism is connected to the modified pre-control mechanism and is used to apply side pressure downward to the web so that the web and the wing plate fit tightly.

[0006] Furthermore, the welding table includes a support table, an internal mounting cavity of the support table, a mounting groove is provided on the top of the support table, the workpiece is sleeved inside the mounting groove, two electromagnet fixing grooves are provided on the bottom wall of the mounting groove, and an electromagnet is fixed inside the electromagnet fixing groove.

[0007] Furthermore, the modified pre-control mechanism includes multiple mounting plates 1 fixed to the top inner wall of the mounting cavity, the multiple mounting plates 1 are internally rotatably connected with a double-section reciprocating threaded rod, the two sections of the reciprocating threads of the double-section reciprocating threaded rod are externally threadedly sleeved with a moving block 1, an L-shaped plate 1 is fixed on the top of the moving block 1, the two L-shaped plates 1 are symmetrically arranged, an L-shaped plate 2 is fixed on the top of the L-shaped plate 1, the two L-shaped plates 2 are symmetrically arranged, a bevel gear 1 is fixed on the outside of the double-section reciprocating threaded rod, a bevel gear 2 is meshed with one side of the bevel gear 1, a rotating shaft 1 is fixed inside the bevel gear 2, a mounting block is fixed on the outside of the rotating shaft 1, the mounting block is fixedly connected to the top wall of the mounting cavity, a one-way gear 1 is installed on one end of the rotating shaft 1, and the rotating shaft 1 passes through and is rotatably connected to one side of the support platform.

[0008] Further, the staggered welding mechanism comprises two groups of mounting plates 2, each group of mounting plates 2 has two mounting plates 2, the two groups of mounting plates 2 are respectively fixed on the sides away from the two L-shaped plates 2, each group of mounting plates 2 is internally rotatably connected with a reciprocating screw, one end of the reciprocating screw is fixed with a gear 2, each group of mounting plates 2 is fixed with a guide rod, the external thread sleeve of the reciprocating screw is provided with a moving block 2, the installation positions of the moving blocks 2 of the two reciprocating screws are opposite, the moving block 2 is sleeved on the outside of the guide rod, and a welding gun is obliquely fixed on the bottom of the moving block 2; The L-shaped plate 2 is provided with a welding gun welding groove, and the welding gun moves in the welding gun welding groove; A vertical plate 1 is fixed on one side of the support platform, and a rotating shaft 2 is rotatably connected to one side of the vertical plate 1. A one-way gear 2 and a gear 3 are installed outside the rotating shaft 2, and the gear 3 cooperates with the two gears 2.

[0009] Furthermore, the driving mechanism includes a mounting frame fixed on vertical plate 1, a motor is fixed to the inner wall of the mounting frame, a gear 1 is fixed to the output end of the motor, one side of the gear 1 is meshed with one-way gear 1, and the other side of the gear 1 is meshed with one-way gear 2.

[0010] Furthermore, the web plate side pressure limiting mechanism includes multiple fixed plates fixed on the top of the L-shaped plate two, the two fixed plates on the L-shaped plate two are symmetrically arranged, two slide grooves are provided on the top of the fixed plate, multiple springs one are fixed on the inner wall of the slide groove on the side away from the workpiece, and a slider one is fixed on one end of the multiple springs one facing the workpiece, and a set of sliders is arranged inside the slide groove, a slide rod is fixed on the top of the slider one, a slide rod is sleeved on the outside of the slide rod, a spring two is sleeved on the outside of the slide rod, the top end of the spring two is fixedly connected to the slider two, and the bottom end is fixedly connected to the slider one, an extrusion box is fixed between the two sliders two, an L-shaped push block is sleeved in the opening of the extrusion box, the bottom of the L-shaped push block is fixed to the top of the fixed plate, an inclined block is fixed on the bottom inner wall of the extrusion box, and a rubber pad is fixed on the side of the extrusion box close to the workpiece.

[0011] Furthermore, a controller is fixed on one side of the support platform, and the controller is electrically connected to the motor, the electromagnet and the welding gun respectively.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention performs pre-control on the wing plate and the web plate before welding by installing a deformation pre-control mechanism, controls the deformation of the wing plate and the web plate during welding, and improves the processing efficiency and processing quality of the H-beam by pre-controlling the web plate and the wing plate without correction; 2. The present invention changes the upper pressure combination mode by installing a web side pressure limiter mechanism, applies pressure from the side, ensures the stability of workpiece processing during welding, avoids the tilting of the workpiece caused by upper pressure, and ensures the quality of workpiece processing; 3. The present invention reduces the heat generated during welding by installing a staggered welding mechanism, reduces the deformation amplitude, increases the cooling speed, and improves the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a first-view structural schematic diagram of a welding deformation pre-control device for an H-beam assembly welding and straightening machine proposed in the present invention.

[0014] Figure 2 This is a second perspective structural schematic diagram of a welding deformation pre-control device of an H-beam assembly welding and straightening machine proposed by the present invention.

[0015] Figure 3This is a schematic diagram of the installation cavity structure of a welding deformation pre-control device of an H-beam assembly welding and straightening machine proposed by the present invention.

[0016] Figure 4 This is a schematic diagram of the structure of the staggered welding mechanism of the welding deformation pre-control device of the H-beam assembly welding and straightening machine proposed by the present invention.

[0017] Figure 5 This is a structural schematic diagram of the web side pressure limiting mechanism of the welding deformation pre-control device of the H-beam assembly welding and straightening machine proposed by the present invention.

[0018] Figure 6 The present invention provides a schematic cross-sectional structure diagram of a web side pressure limiting mechanism of a welding deformation pre-control device of an H-beam assembly welding and straightening machine.

[0019] In the figure: 1. Welding table; 11. Support table; 12. Mounting cavity; 13. Mounting slot; 14. Electromagnet; 2. Modified pre-control mechanism; 21. Mounting plate 1; 22. Double-section reciprocating threaded rod; 23. Bevel gear 1; 24. Moving block 1; 25. L-shaped plate 1; 26. L-shaped plate 2; 27. Mounting block; 28. Rotating shaft 1; 29. ​​One-way gear 1; 210. Bevel gear 2; 3. Staggered welding mechanism; 31. Mounting plate 2; 32. Reciprocating screw; 33. Gear 2; 34. Moving block 2; 35. Welding gun; 36. Guide rod; 37. Welding gun welding slot; 38. One-way gear 2; 39. Gear 3; 310. Vertical plate 1; 4. Driving mechanism; 41. Mounting frame; 42. Motor; 43. Gear 1; 5. Web side pressure limit mechanism; 51. Fixed plate; 52. Slide groove; 53. Spring 1; 54. Slider 1; 55. Sliding rod; 56. Spring 2; 57. Slider 2; 58. Extrusion box; 59. Rubber pad; 510. Oblique block; 511. L-shaped push block; 6. Workpiece. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0023] Example: Refer to Figure 1-Figure 6 : A welding deformation pre-control device of an H-beam assembly welding and straightening machine, comprising a welding table 1 and a workpiece 6, and also comprising: A deformation pre-control mechanism 2, which is connected to the welding table 1 and is used to control the deformation of the workpiece 6 before welding; A staggered welding mechanism 3, which is connected to the deformation pre-control mechanism 2 and is used for staggered welding of two sides of the web; A driving mechanism 4, which is connected to the staggered welding mechanism 3 and is used to drive the staggered welding mechanism 3 and the deformation pre-control mechanism 2 to operate; The web side pressure limiting mechanism 5 is connected to the modified pre-control mechanism 2 and is used to apply side pressure downward to the web so that the web and the wing plate fit tightly.

[0024] The welding table 1 includes a support table 11, an internal mounting cavity 12 of the support table 11, a mounting groove 13 is provided on the top of the support table 11, a workpiece 6 is sleeved inside the mounting groove 13, and two electromagnet fixing grooves are provided on the bottom wall of the mounting groove 13, and an electromagnet 14 is fixed inside the electromagnet fixing groove.

[0025] The modified pre-control mechanism 2 includes a plurality of mounting plates 21 fixed on the inner wall at the top of the mounting cavity 12, the plurality of mounting plates 21 are internally rotatably connected with a double-section reciprocating threaded rod 22, the two sections of the reciprocating threads of the double-section reciprocating threaded rod 22 are both threadedly sleeved with a moving block 24 on the outside, an L-shaped plate 25 is fixed on the top of the moving block 24, the two L-shaped plates 25 are symmetrically arranged, an L-shaped plate 26 is fixed on the top of the L-shaped plate 25, the two L-shaped plates 26 are symmetrically arranged, a bevel gear 23 is fixed on the outside of the double-section reciprocating threaded rod 22, a bevel gear 210 is meshed on one side of the bevel gear 23, a rotating shaft 28 is fixed on the inside of the bevel gear 210, a mounting block 27 is fixed on the outside of the rotating shaft 28, the mounting block 27 is fixedly connected to the top wall of the mounting cavity 12, a one-way gear 29 is installed on one end of the rotating shaft 28, and the rotating shaft 28 passes through and is rotatably connected to one side of the support platform 11.

[0026] The staggered welding mechanism 3 includes two groups of mounting plates 2 31, each group of mounting plates 2 31 has two members, and the two groups of mounting plates 2 31 are respectively fixed on the sides away from the two L-shaped plates 2 26, and the interior of each group of mounting plates 2 31 is rotatably connected with a reciprocating screw 32, and a gear 2 33 is fixed to one end of the reciprocating screw 32, and a guide rod 36 is fixed to each group of mounting plates 2 31, and a moving block 2 34 is sleeved on the external thread of the reciprocating screw 32, and the installation positions of the moving blocks 2 34 of the two reciprocating screws 32 are opposite, and the moving blocks 2 34 are sleeved on the outside of the guide rod 36, and a welding gun 35 is tilted and fixed to the bottom of the moving block 2 34; A welding gun welding groove 37 is provided on the L-shaped plate 26, and the welding gun 35 moves in the welding gun welding groove 37; A vertical plate 1 310 is fixed to one side of the support platform 11 , and a rotating shaft 2 is rotatably connected to one side of the vertical plate 1 310 . A one-way gear 2 38 and a gear 3 39 are installed outside the rotating shaft 2 , and the gear 3 39 cooperates with the two gears 2 33 .

[0027] The driving mechanism 4 includes a mounting frame 41 fixed on a vertical plate 310, a motor 42 is fixed to the inner wall of the mounting frame 41, a gear 43 is fixed to the output end of the motor 42, one side of the gear 43 is meshed with the one-way gear 29, and the other side of the gear 43 is meshed with the one-way gear 2 38.

[0028] The web side pressure limiting mechanism 5 includes a plurality of fixed plates 51 fixed on the top of the L-shaped plate 26. The fixed plates 51 on the two L-shaped plates 26 are symmetrically arranged. Two slide grooves 52 are provided on the top of the fixed plate 51. A plurality of springs 53 are fixed to the inner wall of the slide groove 52 on the side away from the workpiece 6. A slider 54 is fixed to the end of the plurality of springs 53 facing the workpiece 6. The slider 54 is sleeved in the interior of the slide groove 52. A slide bar 55 is fixed to the top of the slider 54. A slide bar 57 is sleeved on the outside of the slide bar 55. A spring 2 56 is sleeved on the outside of the slide bar 55. The top of the spring 2 56 is fixedly connected to the slider 2 57, and the bottom of the spring 2 56 is fixedly connected to the slider 1 54. An extrusion box 58 is fixed between the two sliders 2 57. An L-shaped push block 511 is sleeved in the opening of the extrusion box 58. The bottom of the L-shaped push block 511 is fixed to the top of the fixed plate 51. An inclined block 510 is fixed to the bottom inner wall of the extrusion box 58. A rubber pad 59 is fixed to the side of the extrusion box 58 close to the workpiece 6.

[0029] A controller is fixed on one side of the support platform 11 , and the controller is electrically connected to the motor 42 , the electromagnet 14 and the welding gun 35 .

[0030] Working principle: The wing plate is placed inside the mounting groove 13, and then the web plate is placed vertically at the center of the top of the wing plate. Then, the electromagnet 14 is started by the controller, and the electromagnet 14 generates suction to suck the wing plate. The edge of the wing plate is prone to warping due to production or storage reasons. The edge warping will affect the position deviation of the web plate and the wing plate welding. In addition, leveling the wing plate can facilitate the movement of the deformation pre-control mechanism 2 and prevent the edge of the wing plate from blocking the movement of the deformation pre-control mechanism 2. The control motor 42 drives the gear 1 43 to rotate forwardly. The forward rotation of the gear 1 43 meets the requirement that the one-way gear 1 29 drives the central shaft to rotate. Therefore, the one-way gear 1 29 drives the rotating shaft 1 28 to rotate. The rotation of the rotating shaft 1 28 drives the bevel gear 2 210 to rotate. The bevel gear 210 drives the bevel gear 1 23 and the double-section reciprocating threaded rod 22 to rotate, so that the two moving blocks 1 24 drive the L-shaped plate 1 25 to approach each other. The L-shaped plate 1 25 drives the L-shaped plate 26 and the web side pressure limiting mechanism 5 above the L-shaped plate 26 to move close to the side of the web. After the rubber pad 59 contacts the side of the web, the extrusion box 58 cannot move further. After the extrusion box 58 cannot move, the L-shaped plate 26 will continue to drive the fixed plate 51 and the L-shaped push block 511 to move. Because the extrusion box 58 cannot move, the slider 2 57, the slide bar 55, the spring 2 56 and the slider 1 54 connected thereto cannot move further. The continuous movement of the fixed plate 51 will compress the spring 1 53. The thrust generated by the compression of the spring 1 53 acts on the extrusion box 58 to correct the web and prevent the web from tilting. The L-shaped plate 26 continues to move to make the fixed plate 51 and the L-shaped push block 511 gradually approach the web. When the L-shaped push block 511 moves and inserts into the extrusion box 58 The L-shaped push block 511 is fixed, so it will squeeze the inclined block 510 to push the squeeze box 58 downward. The squeeze box 58 pushes down and drives the slider 2 57 to slide downward on the slide bar 55 and compress the spring 2 56. The downward movement of the squeeze box 58 will cause the rubber pad 59 to move downward. Because one side of the rubber pad 59 is in contact with the web, the friction between the rubber pad 59 and the web will give the web a downward thrust from the side when it moves downward, so that the bottom of the web fits tightly with the top of the wing below, ensuring the quality of welding. The L-shaped plate 26 continues to move and fits completely with the side of the web, clamping the web so that the web and the wing are in a tightly fitted state. When the L-shaped plate 26 moves, it will drive the reciprocating screw 32 and the gear 2 33 to move synchronously, so that the gear 2 33 meshes with the gear 3 39, and then the motor 42 is started to drive the gear 1 43 to reverse. The reverse rotation of the gear 1 43 meets the requirement that the one-way gear 2 38 drives the central shaft to rotate, so the one-way gear 2 38 drives the rotating shaft 2 to rotate, so that the rotating shaft 2 drives the gear 3 39 to rotate, and the gear 3 39 drives the two gears 2 33 to rotate, so that the reciprocating screw 32 rotates, and the two reciprocating screws 32 rotate to drive the moving blocks 2 34 to move, and the two moving blocks 2 34 drive the welding gun 35 to move, and the controller starts the welding gun 35 to weld the gap between the web and the wing plate, and the two welding guns 35 start staggered welding from both ends. This welding method can reduce the heat generated by simultaneous welding and reduce the amplitude of deformation; After welding is completed, wait for the welding position to cool down, then start the motor 42 to drive the gear 1 43 to rotate forward, so that the two moving blocks moved to the reciprocating thread tail of the double-section reciprocating threaded rod 22 are reset away from each other, and at the same time, the L-shaped plate 1 25 and the L-shaped plate 2 26 and other structures are reset, so as to release the clamping and lateral pressure on the web, and then weld another wing plate to form an H-shaped steel plate.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding deformation pre-control device for an H-beam assembly welding and straightening machine, comprising a welding table (1) and a workpiece (6), characterized in that: Also includes: A deformation pre-control mechanism (2) connected to the welding table (1) and used to control the deformation of the workpiece (6) before welding; A staggered welding mechanism (3), which is connected to the deformation pre-control mechanism (2) and is used for staggered welding of two sides of the web; A driving mechanism (4) connected to the staggered welding mechanism (3) and used to drive the staggered welding mechanism (3) and the deformation pre-control mechanism (2) to operate; A web side pressure limiting mechanism (5), which is connected to the modified pre-control mechanism (2) and is used to apply side pressure downward to the web so that the web and the wing plate fit tightly together; The welding platform (1) comprises a support platform (11), and an internal mounting cavity (12) of the support platform (11); The modified pre-control mechanism (2) comprises a plurality of mounting plates (21) fixed to the inner wall of the top of the mounting cavity (12), the plurality of mounting plates (21) being internally rotatably connected with a double-section reciprocating threaded rod (22), the two sections of the reciprocating thread of the double-section reciprocating threaded rod (22) being externally threadedly sleeved with a moving block (24), an L-shaped plate (25) being fixed on the top of the moving block (24), the two L-shaped plates (25) being symmetrically arranged, an L-shaped plate (26) being fixed on the top of the L-shaped plate (25), the two L-shaped plates (26) being symmetrically arranged; The web side pressure limiting mechanism (5) comprises a plurality of fixed plates (51) fixed on the top of the L-shaped plate (26), the fixed plates (51) on the two L-shaped plates (26) are symmetrically arranged, two slide grooves (52) are arranged on the top of the fixed plates (51), a plurality of springs (53) are fixed on the inner wall of the slide groove (52) away from the workpiece (6), a slider (54) is fixed on the end of the plurality of springs (53) facing the workpiece (6), the slider (54) is sleeved inside the slide groove (52), a slide rod (55) is fixed on the top of the slider (54), and the slide rod (55) The outer sleeve of the slide bar (55) is provided with a second slide block (57), the outer sleeve of the slide bar (55) is provided with a second spring (56), the top end of the second spring (56) is fixedly connected to the second slide block (57), and the bottom end is fixedly connected to the first slide block (54), an extrusion box (58) is fixed between the two second slide blocks (57), an L-shaped push block (511) is provided inside the opening of the extrusion box (58), the bottom of the L-shaped push block (511) is fixed to the top of the fixed plate (51), an inclined block (510) is fixed to the inner wall of the bottom of the extrusion box (58), and a rubber pad (59) is fixed to the side of the extrusion box (58) close to the workpiece (6).

2. The welding deformation pre-control device of the H-beam welding and straightening machine according to claim 1 is characterized in that: The top of the support platform (11) is provided with a mounting groove (13), the workpiece (6) is sleeved inside the mounting groove (13), the bottom wall of the mounting groove (13) is provided with two electromagnet fixing grooves, and electromagnets (14) are fixed inside the electromagnet fixing grooves.

3. The welding deformation pre-control device of the H-beam assembly welding and straightening machine according to claim 2 is characterized in that: A bevel gear 1 (23) is fixed to the outside of the double-stage reciprocating threaded rod (22), a bevel gear 2 (210) is meshed with one side of the bevel gear 1 (23), a rotating shaft 1 (28) is fixed to the inside of the bevel gear 2 (210), a mounting block (27) is fixed to the outside of the rotating shaft 1 (28), the mounting block (27) is fixedly connected to the top wall of the mounting cavity (12), a one-way gear 1 (29) is mounted on one end of the rotating shaft 1 (28), and the rotating shaft 1 (28) is rotatably connected to one side of the support platform (11).

4. The welding deformation pre-control device of the H-beam assembly welding and straightening machine according to claim 3 is characterized in that: The staggered welding mechanism (3) comprises two groups of mounting plates (31), each group of mounting plates (31) comprises two mounting plates (31), the two groups of mounting plates (31) are respectively fixed on the sides of two L-shaped plates (26) that are far away from each other, each group of mounting plates (31) is internally rotatably connected with a reciprocating screw (32), one end of the reciprocating screw (32) is fixed with a gear (33), each group of mounting plates (31) is fixed with a guide rod (36), the external thread sleeve of the reciprocating screw (32) is provided with a moving block (34), the installation positions of the moving blocks (34) of the two reciprocating screws (32) are opposite, the moving blocks (34) are sleeved on the outside of the guide rod (36), and a welding gun (35) is obliquely fixed to the bottom of the moving block (34); The L-shaped plate 2 (26) is provided with a welding gun welding groove (37), and the welding gun (35) moves in the welding gun welding groove (37); A vertical plate 1 (310) is fixed to one side of the support platform (11), and a rotating shaft 2 is rotatably connected to one side of the vertical plate 1 (310). A one-way gear 2 (38) and a gear 3 (39) are mounted on the outside of the rotating shaft 2, and the gear 3 (39) cooperates with the two gears 2 (33).

5. The welding deformation pre-control device of the H-beam assembly welding and straightening machine according to claim 4 is characterized in that: The driving mechanism (4) comprises a mounting frame (41) fixed on a vertical plate 1 (310), a motor (42) being fixed to an inner wall of the mounting frame (41), a gear 1 (43) being fixed to an output end of the motor (42), one side of the gear 1 (43) being meshed with a one-way gear 1 (29), and the other side of the gear 1 (43) being meshed with a one-way gear 2 (38).

6. The welding deformation pre-control device of the H-beam assembly welding and straightening machine according to claim 5 is characterized in that: A controller is fixed on one side of the support platform (11), and the controller is electrically connected to the motor (42), the electromagnet (14) and the welding gun (35) respectively.

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