Assembling and welding device for preventing deformation of profile steel flanges and profile steel assembling and welding method

Abstract

The invention provides a section steel flange anti-deformation assembling and welding device and a section steel assembling and welding method, and belongs to the technical field of steel structure machining. Combined section steel is conveyed to the position of a welding mechanism through a first section of section steel conveying line to be welded to a web and a wing plate; a welding seam formed by welding the web and the wing plate is continuously conveyed into the workbench frame along with the conveying mechanism, the web at the welding seam position is clamped through the web clamping mechanism, the wing plate at the welding seam position is pressed through the wing plate pressing mechanism, and then the welding seam position is fixed. And according to pre-calculated deformation parameters generated in the welding process of the wing plate and the web plate of the profile steel, the jacking roller is lifted to a set amount through the jacking roller lifting mechanism so as to apply reversible deformation force to the wing plate at the welding seam position, and correction of the wing plate at the welding seam position is completed. Compared with existing T / H-shaped steel assembling, welding and correcting equipment, the T / H-shaped steel assembling, welding and correcting equipment has the advantages that T / H-shaped steel one-time welding forming is achieved through reversible deformation, secondary correction is not needed, production efficiency is effectively improved, and cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure processing, and more specifically, to a steel flange anti-deformation assembly welding device and a steel assembly welding method. Background Art

[0002] Intelligent steel structure mechanical assembly welding technology has become the future development direction of the steel structure field. The welding technology of T-shaped steel and H-shaped steel assembly welding and straightening machine is to combine the web and wing of the steel and send them to the welding mechanism through the transmission line. The welding mechanism welds the web and wing assembled on the conveyor line. The welds produced after the wing and web are welded need to be corrected.

[0003] At present, the T / H-shaped steel welded by the T / H-shaped steel assembly welding and straightening machine is straightened in a hot state. After the straightening is completed, there is a temperature difference between the front and back sides of the T / H-shaped steel flange plate. When the T / H-shaped steel is cooled to room temperature, the flange plate of the T / H-shaped steel will still deform, so manual secondary correction is required, resulting in low production efficiency and high cost. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a steel flange anti-deformation assembly welding device and a steel assembly welding method to solve the problem in the prior art that after the T / H-shaped steel welded by the T / H-shaped steel assembly welding and correction machine is corrected in a hot state, due to the temperature difference between the front and back sides of the steel wing plate, it is deformed when cooled to room temperature, so manual secondary correction is required, resulting in low production efficiency and high cost.

[0005] The steel flange anti-deformation assembly welding device provided by the present invention is applied to the welding process of the wing plate and the web plate of T-shaped steel and H-shaped steel, and comprises a workbench frame, a conveying mechanism, a welding mechanism, a fixing mechanism and a weld anti-deformation mechanism; wherein,

[0006] The conveying mechanism comprises a first section of profiled steel conveying line arranged at the profiled steel inlet of the workbench frame and a second section of profiled steel conveying line arranged at the profiled steel outlet of the workbench frame;

[0007] The welding mechanism is arranged outside the steel section inlet of the workbench frame, and comprises a first welding torch and a second welding torch respectively arranged on both sides of the contact portion between the bottom of the web plate and the wing plate;

[0008] The fixing mechanism is arranged inside the frame of the workbench frame, and includes at least two groups of web clamping mechanisms and a wing plate pressing mechanism arranged between adjacent web clamping mechanisms; wherein each group of web clamping mechanisms includes a first clamping wheel and a second clamping wheel symmetrically arranged on both sides of the web; the wing plate pressing mechanism includes a first pressing roller and a second pressing roller symmetrically arranged on both sides of the web; the bottom surfaces of the first pressing roller and the second pressing roller abut against the top surface of the wing plate;

[0009] The weld anti-deformation mechanism includes a lifting roller arranged inside the frame and a lifting roller lifting mechanism providing lifting power for the lifting roller; the top of the lifting roller corresponds to the weld position and is located between the first clamping wheel and the second clamping wheel.

[0010] In addition, a preferred structure is that the workbench frame includes a bottom support frame and a frame workbench arranged on the top of the bottom support frame; fixing plates are arranged on both sides of the bottom of the bottom support frame; and the fixing plates are fixed to the ground by bolts.

[0011] In addition, a preferred structure is that both the first section of the steel conveyor line and the second section of the steel conveyor line are conveyor belt mechanisms; the conveyor belt mechanisms include a conveyor belt body and a conveyor belt motor that provides transmission force for the conveyor belt body.

[0012] In addition, a preferred structure is that the first welding torch and the second welding torch are respectively fixed on both sides of the contact portion between the bottom of the web and the wing plate through a welding robot arm.

[0013] In addition, a preferred structure is that both the first clamping wheel and the second clamping wheel are fixed to the inner side wall of the workbench frame through a telescopic rod.

[0014] In addition, a preferred structure is that the first clamping wheel and the second clamping wheel have the same structure, both comprising a fixed block, a first wheel body whose bottom surface is fixed to the top surface of the fixed block, and a second wheel body whose top surface is fixed to the bottom surface of the fixed block; one end of the fixed block is connected to the telescopic end of the telescopic rod; the fixed end of the telescopic rod is fixed to the inner side wall of the frame of the workbench frame.

[0015] In addition, a preferred structure is that the lifting mechanism of the lifting roller includes a first lifting arm and a second lifting arm respectively arranged at both ends of the lifting roller; a first bearing seat and a second bearing seat are respectively arranged on the top of the first lifting arm and the second lifting arm; a first bearing and a second bearing are respectively arranged inside the first bearing seat and the second bearing seat; and the shafts at both ends of the lifting roller are respectively connected to the first bearing and the second bearing.

[0016] In addition, a preferred structure is that the first lifting arm is a hydraulic lifting arm; and / or the second lifting arm is a hydraulic lifting arm.

[0017] In addition, a preferred structure is that two ends of the first pressing roller and the second pressing roller are respectively fixed to inner walls on both sides of the workbench frame.

[0018] The steel section welding method provided by the present invention uses the steel section flange anti-deformation welding device as described above to weld the flange plate and the web plate of the steel section, and comprises the following steps:

[0019] After assembling the flange plate and the web plate of the steel section to be welded, place them horizontally on the first section steel section conveying line with the bottom surface of the flange plate facing downward;

[0020] When the first section of the steel conveying line delivers the steel to the welding mechanism, the first welding torch and the second welding torch are used to weld the contact portion between the bottom of the web and the wing plate, so that a weld is formed between the wing plate and the web;

[0021] When the weld is transferred to the inside of the workbench frame, the web at the weld position is clamped and fixed by the web clamping mechanism, the wing at the weld position is clamped and fixed by the wing pressing mechanism, and the upward displacement of the lifting roller is set according to the deformation parameters generated during the welding process of the wing and web of the steel section calculated in advance, and the wing at the weld position is given a counter-deformation force by the lifting roller to correct the deformation of the weld;

[0022] The corrected weld is sent out through the second section of the steel conveying line until the end weld of the steel is sent out, thus completing the assembly welding of the steel.

[0023] It can be seen from the above technical scheme that the steel flange anti-deformation assembly welding device and steel assembly welding method provided by the present invention convey the combined steel to the welding mechanism position through the first section of the steel conveying line to weld the web and the wing plate; the weld formed by welding the web and the wing plate is continuously conveyed into the workbench frame by the conveying mechanism, the web at the weld position is clamped by the web clamping mechanism, and the wing plate at the weld position is pressed by the wing plate pressing mechanism, so as to fix the weld position, and the vertical rise amount of the lifting roller is determined according to the deformation amount parameters generated in the welding process of the wing plate and the web of the steel calculated in advance, and the lifting roller is lifted to the set rise amount by the lifting roller lifting mechanism, so as to give anti-deformation force to the wing plate at the weld position, and complete the correction of the wing plate at the weld position. Compared with the existing T / H-shaped steel assembly welding and correction equipment, the T / H-shaped steel can be welded and formed in one time through anti-deformation, without the need for secondary correction, effectively improving production efficiency and saving costs.

[0024] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By referring to the following description in conjunction with the accompanying drawings, and with a more complete understanding of the present invention, other objects and results of the present invention will become more apparent and easily understood.

[0026] Figure 1 It is a partial isometric view of a welding device for anti-deformation of a steel flange according to an embodiment of the present invention;

[0027] Figure 2 It is a cross-sectional schematic diagram of a steel flange anti-deformation assembly welding device according to an embodiment of the present invention;

[0028] Figure 3 It is an overall isometric view of a steel flange anti-deformation assembly welding device according to an embodiment of the present invention;

[0029] Figure 4 It is a partial effect diagram of the assembly welding device for the anti-deformation of the steel flange according to an embodiment of the present invention;

[0030] Figure 5 is a flow chart of a section steel assembly welding method according to an embodiment of the present invention;

[0031] Figure 6 The figure is a principle block diagram of a steel section welding method according to an embodiment of the present invention.

[0032] In the accompanying drawings, 1-workbench frame, 11-bottom support frame, 12-frame workbench, 13-fixed plate, 21-first section of steel transmission line, 211-conveyor belt body, 212-conveyor belt motor, 22-second section of steel transmission line, 3-welding mechanism, 31-first welding torch, 32-second welding torch, 41-first clamping wheel, 42-second clamping wheel, 43-first pressure roller, 44-second pressure roller, 45-telescopic rod, 46-fixed block, 47-first wheel body, 48-second wheel body, 51-lifting roller, 52-first lifting arm, 53-second lifting arm, 54-first bearing seat, 55-second bearing seat, 6-steel, 61-web plate, 62-wing plate, 7-central control device.

[0033] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0034] In response to the above-mentioned problem, in the prior art, after the T / H-shaped steel welded by a T / H-shaped steel assembly welding and straightening machine is straightened in a hot state, due to the temperature difference between the front and back sides of the steel flange, deformation occurs when it is cooled to room temperature, and manual secondary correction is required, resulting in low production efficiency and high cost. A steel flange anti-deformation assembly welding device and steel assembly welding method are proposed.

[0035] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] In order to illustrate the steel flange anti-deformation assembly welding device and steel assembly welding method provided by the present invention, Figure 1 The partial axial side structure of the welding device for the reverse deformation of the steel flange according to the embodiment of the present invention is shown; Figure 2 The cross-sectional structure of the welding device for the anti-deformation of the flange of a steel section according to an embodiment of the present invention is shown; Figure 3 The overall axial side structure of the welding device for the anti-deformation of the steel flange according to the embodiment of the present invention is shown; Figure 4 The partial structure of the welding device for the reverse deformation of the steel flange according to the embodiment of the present invention is shown; Figure 5 The process of the section steel welding method according to an embodiment of the present invention is shown; Figure 6 The principle of the section steel assembly welding method according to an embodiment of the present invention is shown.

[0037] like Figures 1 to 4 As shown together, the steel flange anti-deformation assembly welding device provided by the present invention is applied to the welding process of the wing plate and the web plate of T-shaped steel and H-shaped steel, and includes a workbench frame 1, a conveying mechanism, a welding mechanism, a fixing mechanism and a weld anti-deformation mechanism; wherein,

[0038] The conveying mechanism includes a first section of a steel section conveying line 21 arranged at the steel section entrance of the workbench frame 1 and a second section of a steel section conveying line 22 arranged at the steel section exit of the workbench frame 1;

[0039] The welding mechanism 3 is arranged outside the steel inlet of the workbench frame 1, and includes a first welding torch 31 and a second welding torch 32 respectively arranged on both sides of the contact portion between the bottom of the web 61 and the wing plate 62;

[0040] The fixing mechanism is arranged inside the frame of the workbench frame 1, and includes at least two groups of web clamping mechanisms and a wing plate pressing mechanism arranged between adjacent web clamping mechanisms; wherein each group of web clamping mechanisms includes a first clamping wheel 41 and a second clamping wheel 42 symmetrically arranged on both sides of the web 61; the wing plate pressing mechanism includes a first pressing roller 43 and a second pressing roller 44 symmetrically arranged on both sides of the web 61; the bottom surfaces of the first pressing roller 43 and the second pressing roller 44 abut against the top surface of the wing plate 62;

[0041] The weld anti-deformation mechanism includes a lifting roller 51 arranged inside the frame and a lifting roller lifting mechanism providing lifting power for the lifting roller; the top of the lifting roller corresponds to the weld position and is located between the first clamping wheel 41 and the second clamping wheel 42.

[0042] It should be noted that in order to ensure that the steel section 6 can be continuously transmitted on the conveying mechanism, the length of the steel section 6 is greater than the frame length of the workbench frame 1 .

[0043] The welding mechanism 3, the fixing mechanism, and the weld anti-deformation mechanism are all connected to a central control device, such as a central control computer, which is preferably fixed on the outer wall of the workbench frame 1, such as Figure 1 It is convenient to control the welding mechanism 3, the fixing mechanism and the weld anti-deformation mechanism.

[0044] It should be noted that the “first” and “second” in the present invention are used to distinguish the positions of components and do not involve any special meanings.

[0045] The assembled steel sections 6 are conveyed to the welding mechanism 3 through the first section of the steel section conveying line 21 to weld the web 61 and the wing 62; the weld formed by welding the web 61 and the wing 62 is continuously conveyed into the workbench frame 1 by the conveying mechanism, the web 61 at the weld position is clamped by the web clamping mechanism, and the wing 62 at the weld position is pressed by the wing pressing mechanism, so as to fix the weld position, and the vertical lifting amount of the lifting roller 51 is determined according to the deformation parameters generated in the welding process of the wing 62 and the web 61 of the steel section in advance, and the lifting roller 51 is lifted to the set lifting amount by the lifting roller lifting mechanism, so as to give the wing 62 at the weld position a reverse deformation force, and complete the correction of the wing 62 at the weld position. Compared with the existing T / H-shaped steel assembly welding and correction equipment, the T / H-shaped steel can be welded and formed in one time through reverse deformation, without the need for secondary correction, thereby effectively improving production efficiency and saving costs.

[0046] As a preferred solution of the present invention, the workbench frame 1 includes a bottom support frame 11 and a frame workbench 12 arranged on the top of the bottom support frame; fixing plates 13 are arranged on both sides of the bottom of the bottom support frame 11; the fixing plates 13 are fixed to the ground by bolts.

[0047] Specifically, the upper part of the workbench frame 1 is a frame workbench, the lower part is a support frame, and the bottom support frame 11 and the frame workbench 12 are an integrated structure or detachably fixedly connected by bolts, etc. The bottom of the bottom support frame 11 is preferably, but not limited to, fixed to the ground by bolts.

[0048] As a preferred solution of the present invention, the first section of the steel conveyor line 21 and the second section of the steel conveyor line 22 are both conveyor belt mechanisms; the conveyor belt mechanism includes a conveyor belt body 211 and a conveyor belt motor 212 that provides transmission force for the conveyor belt body 211 .

[0049] Specifically, the steel conveyor line is preferably but not limited to a conveyor belt mechanism, and can also be a conveyor roller, etc. When it is a conveyor belt mechanism, the conveyor belt motor 212 and the power roller of the conveyor belt body can be connected by a traditional gear set meshing (or gear + chain). This is a prior art and will not be described in detail.

[0050] As a preferred solution of the present invention, the first welding torch 31 and the second welding torch 32 are respectively fixed on both sides of the contact portion between the bottom of the web 61 and the wing plate 62 by welding robot arms.

[0051] Specifically, the first welding torch 31 and the second welding torch 32 are preferably fixed on both sides of the contact area between the bottom of the web 61 and the wing plate 62 by a welding robot arm. When the steel section 6 is conveyed to this position, the web 61 and the wing plate 62 are welded by the first welding torch 31 and the second welding torch 32.

[0052] As a preferred solution of the present invention, the first clamping wheel 41 and the second clamping wheel 42 are both fixed to the inner side wall of the workbench frame 1 through a telescopic rod 45 .

[0053] Specifically, the telescopic rod 45 is preferably, but not limited to, an electrically controlled telescopic rod or a hydraulic rod, and is used to adjust the position of the clamping wheel 41 .

[0054] As a preferred solution of the present invention, the first clamping wheel 41 and the second clamping wheel 42 have the same structure, both comprising a fixed block 46, a first wheel body 47 with a bottom surface fixed on the top surface of the fixed block 46, and a second wheel body 48 with a top surface fixed on the bottom surface of the fixed block 46; one end of the fixed block 46 is connected to the telescopic end of the telescopic rod 45; the fixed end of the telescopic rod 45 is fixed to the inner side wall of the workbench frame 1. Through the above structural design, the double-wheel clamping wheel has a better clamping and fixing effect on the web 61.

[0055] As a preferred solution of the present invention, the lifting roller lifting mechanism includes a first lifting arm 52 and a second lifting arm 53 respectively arranged at both ends of the lifting roller 51; a first bearing seat 54 and a second bearing seat 55 are respectively arranged on the top of the first lifting arm 52 and the second lifting arm 53; a first bearing and a second bearing are respectively arranged inside the first bearing seat 54 and the second bearing seat 55; and the shafts at both ends of the lifting roller 51 are respectively connected to the first bearing and the second bearing. Through the above structural design, the lifting roller 51 can be lifted and lowered more smoothly.

[0056] As a preferred solution of the present invention, the first lifting arm 52 is a hydraulic lifting arm; and / or the second lifting arm 53 is a hydraulic lifting arm.

[0057] It should be noted that the first lifting arm 52 and the second lifting arm 53 are preferably, but not limited to, hydraulic lifting arms.

[0058] As a preferred solution of the present invention, both ends of the first pressing roller 43 and the second pressing roller 44 are respectively fixed on the inner walls on both sides of the workbench frame 1 .

[0059] like Figure 5 and Figure 6As shown, the steel section welding method provided by the present invention uses the steel section flange anti-deformation welding device as described above to weld the flange plate and the web plate of the steel section, comprising the following steps:

[0060] Step S1, after the wing plate 62 and the web plate 61 of the steel section 6 to be welded are assembled, they are horizontally placed on the first section steel section conveying line 21 in a manner that the bottom surface of the wing plate 62 faces downward;

[0061] Step S2, when the first section of the steel conveying line 21 delivers the steel 6 to the welding mechanism, the first welding torch 31 and the second welding torch 32 are used to weld the contact portion between the bottom of the web 61 and the wing 62, so that a weld is formed between the wing 62 and the web 61;

[0062] Step S3, when the weld is transferred to the inside of the workbench frame 1, the web 61 at the weld position is clamped and fixed by the web clamping mechanism, the wing 62 at the weld position is clamped and fixed by the wing pressing mechanism, and the upward displacement of the lifting roller 51 is set according to the deformation parameters generated during the welding process of the wing and web of the steel section calculated in advance, and the anti-deformation force is applied to the wing 62 at the weld position by the lifting roller 51 to correct the deformation of the weld;

[0063] Step S4: The corrected weld is sent out through the second section steel conveyor line 22 until the end weld of the steel 6 is sent out, thus completing the assembly welding of the steel.

[0064] It should be noted that: Figure 6 The workpiece in the invention refers to the steel section 6.

[0065] It can be seen from the above specific embodiments that the steel flange anti-deformation assembly welding device and steel assembly welding method provided by the present invention convey the combined steel to the welding mechanism position through the first section of the steel conveying line to weld the web and the wing plate; the weld formed by welding the web and the wing plate is continuously conveyed into the workbench frame by the conveying mechanism, the web at the weld position is clamped by the web clamping mechanism, and the wing plate at the weld position is pressed by the wing plate pressing mechanism, so as to fix the weld position, and the vertical rise amount of the lifting roller is determined according to the deformation amount parameters generated in the welding process of the wing plate and the web of the steel calculated in advance, and the lifting roller is lifted to the set rise amount by the lifting roller lifting mechanism, so as to give anti-deformation force to the wing plate at the weld position, and complete the correction of the wing plate at the weld position. Compared with the existing T / H-shaped steel assembly welding and correction equipment, the T / H-shaped steel can be welded and formed in one time through anti-deformation, without the need for secondary correction, thereby effectively improving production efficiency and saving costs.

[0066] As described above, the steel flange anti-deformation assembly welding device and steel flange assembly welding method proposed by the present invention are described by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the steel flange anti-deformation assembly welding device and steel flange assembly welding method proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A welding device for the reverse deformation of steel flanges, applied to the welding process of flanges and webs of T-shaped steels and H-shaped steels, characterized in that: It includes a workbench frame, a conveying mechanism, a welding mechanism, a fixing mechanism and a weld anti-deformation mechanism; wherein, The conveying mechanism comprises a first section of profiled steel conveying line arranged at the profiled steel inlet of the workbench frame and a second section of profiled steel conveying line arranged at the profiled steel outlet of the workbench frame; The welding mechanism is arranged outside the steel section inlet of the workbench frame, and comprises a first welding torch and a second welding torch respectively arranged on both sides of the contact portion between the bottom of the web plate and the wing plate; The fixing mechanism is arranged inside the frame of the workbench frame, and includes at least two groups of web clamping mechanisms and a wing plate pressing mechanism arranged between adjacent web clamping mechanisms; wherein each group of web clamping mechanisms includes a first clamping wheel and a second clamping wheel symmetrically arranged on both sides of the web; the wing plate pressing mechanism includes a first pressing roller and a second pressing roller symmetrically arranged on both sides of the web; the bottom surfaces of the first pressing roller and the second pressing roller abut against the top surface of the wing plate; The weld anti-deformation mechanism includes a lifting roller arranged inside the frame and a lifting roller lifting mechanism providing lifting power for the lifting roller; the top of the lifting roller corresponds to the weld position and is located between the first clamping wheel and the second clamping wheel.

2. The welding device for anti-deformation of steel flange according to claim 1 is characterized in that: The workbench frame includes a bottom support frame and a frame workbench arranged on the top of the bottom support frame; fixing plates are arranged on both sides of the bottom of the bottom support frame; and the fixing plates are fixed to the ground by bolts.

3. The welding device for anti-deformation of steel flange according to claim 1 is characterized in that: The first section of the steel conveyor line and the second section of the steel conveyor line are both conveyor belt mechanisms; The conveyor belt mechanism comprises a conveyor belt body and a conveyor belt motor which provides transmission force for the conveyor belt body.

4. The welding device for anti-deformation of steel flange according to claim 1, characterized in that: The first welding torch and the second welding torch are respectively fixed on both sides of the contact portion between the bottom of the web and the wing plate through a welding robot arm.

5. The welding device for anti-deformation of steel flange according to claim 1 is characterized in that: The first clamping wheel and the second clamping wheel are both fixed to the inner side wall of the workbench frame through a telescopic rod.

6. The welding device for anti-deformation of steel flange according to claim 5, characterized in that: The first clamping wheel and the second clamping wheel have the same structure, both comprising a fixed block, a first wheel body whose bottom surface is fixed on the top surface of the fixed block, and a second wheel body whose top surface is fixed on the bottom surface of the fixed block; One end of the fixed block is connected to the telescopic end of the telescopic rod; The fixed end of the telescopic rod is fixed on the inner side wall of the workbench frame.

7. The welding device for anti-deformation of steel flange according to claim 1, characterized in that: The lifting roller lifting mechanism comprises a first lifting arm and a second lifting arm respectively arranged at both ends of the lifting roller; a first bearing seat and a second bearing seat are respectively arranged on the top of the first lifting arm and the second lifting arm; a first bearing and a second bearing are respectively arranged inside the first bearing seat and the second bearing seat; The shafts at both ends of the lifting roller are connected to the first bearing and the second bearing respectively.

8. The welding device for anti-deformation of steel flange according to claim 7, characterized in that: The first lifting arm is a hydraulic lifting arm; and / or, The second lifting arm is a hydraulic lifting arm.

9. The welding device for anti-deformation of steel flange according to claim 1, characterized in that: The two ends of the first pressing roller and the second pressing roller are respectively fixed on the inner walls on both sides of the workbench frame.

10. A method for welding section steel, characterized in that: The flange plate and web plate of a steel section are welded by using the steel section flange anti-deformation assembly welding device as claimed in any one of claims 1 to 9, comprising the following steps: After assembling the flange plate and the web plate of the steel section to be welded, place them horizontally on the first section steel section conveying line with the bottom surface of the flange plate facing downward; When the first section of the steel conveying line delivers the steel to the welding mechanism, the first welding torch and the second welding torch are used to weld the contact portion between the bottom of the web and the wing plate, so that a weld is formed between the wing plate and the web; When the weld is transferred to the inside of the workbench frame, the web at the weld position is clamped and fixed by the web clamping mechanism, the wing at the weld position is clamped and fixed by the wing pressing mechanism, and the upward displacement of the lifting roller is set according to the deformation parameters generated during the welding process of the wing and web of the steel section calculated in advance, and the wing at the weld position is given a counter-deformation force by the lifting roller to correct the deformation of the weld; The corrected weld is sent out through the second section of the steel conveying line until the end weld of the steel is sent out, thus completing the assembly welding of the steel.

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