Welding device for steel structure factory building construction and using method thereof

Abstract

The invention relates to the technical field of welding equipment, and discloses a welding device for steel structure factory building construction and a using method thereof.The welding device comprises a surrounding frame arranged on a steel frame, the surrounding frame is composed of a first side baffle, a second side baffle, an upper arc frame and a lower arc frame, and the surrounding frame wraps the periphery of the steel frame and is used for reducing interference of the external environment in the welding process; the upper arc frame and the lower arc frame are rotationally connected with the first side baffle and the second side baffle, the enclosure frame is adopted for wrapping the welding position of the rod frame, welding heat loss is reduced, meanwhile, welding operation is completed in the mechanical mode that the welding gun moving mechanism is adopted for driving welding to move, health damage to operators is reduced, and the welding efficiency is improved. And the moving uniformity of the welding gun can be guaranteed, and the welding effect is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and in particular to a welding device for steel structure factory building construction and a use method thereof. Background Art

[0002] Nowadays, in the process of building construction, in order to improve the stability of the building, steel structure is generally used for construction. The steel structure is specifically a structural system composed of steel connected by components. Its core feature is that steel is the main load-bearing material. The high strength, good plasticity and toughness of steel, as well as excellent processing performance, are used to achieve efficient load-bearing and flexible design of the structure. Therefore, steel structures are used in the construction process of some factories, and welding is required to connect the steel structure components during the construction of steel structure factories.

[0003] However, in the existing factory building steel structure welding process, most of the welding is done by manual high-altitude welding with a handheld welding gun, which has a high welding risk. In addition, there is a lack of preheating before welding, and the welding speed is uneven during the welding process, sometimes too fast or too slow. After welding, the weld metal is affected by the external environment and cools too quickly. These situations can easily cause cracks or welding defects in the weld, affecting the connection strength of the steel structure. Summary of the Invention

[0004] The object of the present invention is to provide a welding device for steel structure factory building construction and a method of using the same, so as to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a welding device for steel structure factory building construction, including a frame arranged on a steel frame, the frame consisting of side baffle 1, side baffle 2, an upper arc frame and a lower arc frame, which is wrapped around the periphery of the steel frame and is used to reduce interference from the external environment during welding, wherein the upper arc frame and the lower arc frame are in a state of rotational connection with the side baffle 1 and the side baffle 2; a welding gun is installed on the lower arc frame for welding the steel frame, and a preheating mechanism is provided on the upper arc frame, the preheating mechanism is used to preheat the steel frame, and the preheating mechanism and the welding gun are arranged on opposite sides of the steel frame.

[0006] Furthermore, a welding gun moving mechanism is provided on the lower arc frame. The welding gun moving mechanism consists of a transverse screw moving assembly, a moving frame, a thumb electric push rod, a mounting frame and a rotating motor. The welding gun is driven to move laterally through the transverse screw moving assembly, the distance between the welding gun and the steel frame is adjusted by the thumb electric push rod, and the welding angle of the welding gun is adjusted by the rotating motor, thereby enabling the steel frame to be welded at a uniform speed.

[0007] Furthermore, both side baffle 1 and side baffle 2 are provided with a positioning and clamping mechanism, which is composed of a bidirectional screw lateral movement component, two clamping frames, a bidirectional screw longitudinal movement component and two clamping plates. The bidirectional screw lateral movement component is used to drive the two clamping frames to move, and is used to clamp the steel frame in the horizontal direction. The bidirectional screw longitudinal movement component is arranged on the clamping frame, and is used to drive the two clamping plates to clamp the top and bottom of the steel frame to complete the clamping in the vertical direction, thereby fixing side baffle 1 and side baffle 2 to the steel frame.

[0008] Furthermore, an annular T-slot is provided on the side baffle, and a T-shaped arc bar is installed on both the upper arc frame and the lower arc frame. The T-shaped arc bar is rotatably connected to the annular T-slot, and a rotating motor is installed on the side baffle. The rotating motor is engaged with the T-shaped arc bar through a gear to drive the upper arc frame and the lower arc frame to rotate.

[0009] Furthermore, the preheating mechanism consists of an adjustable electric push rod, a mounting frame, a heat-conducting roller and a heating plate. The adjustable electric push rod is installed on the upper arc frame, the mounting frame is arranged in the surrounding frame, the mounting frame is connected to the telescopic shaft of the adjustable electric push rod, the heat-conducting roller is arranged on the mounting frame, the heating plate is arranged on the mounting frame, and the heating plate is in contact with the heat-conducting roller. During use, the heat-conducting roller is in contact with the steel frame, and is used to conduct the heat generated by the heating plate to the steel frame to complete the preheating of the steel frame.

[0010] Furthermore, the number of heat-conducting rollers is set to multiple, and a synchronous belt assembly is provided on the mounting frame. The synchronous belt assembly is used to drive the multiple heat-conducting rollers to form a circular movement state on the mounting frame. The surface of the heat-conducting roller is provided with a hook groove, which is used to polish the surface of the steel frame through the movement of the heat-conducting roller.

[0011] Furthermore, the side baffle plate 2 is composed of two arc-shaped side plates 2, both of which are provided with T-shaped arc grooves, and the upper arc frame and the lower arc frame are both installed with T-shaped arc bars 2, which are slidingly connected to the T-shaped arc grooves, and the upper arc frame and the lower arc frame are both provided with T-shaped slide grooves, and T-shaped sliders are slidingly installed in the T-shaped slide grooves, and the T-shaped arc blocks are connected to the T-shaped arc bars 2, which are used to enable the side baffle plate 2 to be in a relatively movable state while being able to rotate with the upper arc frame and the lower arc frame.

[0012] Furthermore, an arc-shaped extrusion plate is provided in the lower arc frame, and the arc-shaped extrusion plate is connected to the side baffle plate 2. An arc-shaped fixing strip is installed on the upper arc frame, and a connecting rod is slidably installed on the arc-shaped fixing strip. An arc-shaped pushing plate is provided on one side of the arc-shaped fixing strip, and the arc-shaped pushing plate is connected to the connecting rod. A pushing spring is sleeved on the connecting rod, and the pushing spring is used to push the arc-shaped pushing plate to return to its original state when the arc-shaped pushing plate is not subjected to external force. The thickness of both sides of the arc-shaped extrusion plate is the same, and the thickness of both sides is less than the thickness of the middle. In the initial state, one side of the two steel frames is in a contact state. After preheating one side of the steel frame by the preheating mechanism, in order to avoid thermal expansion of the steel frame, the upper arc frame and the lower arc frame are driven to rotate by a rotating motor, thereby causing the arc-shaped pushing plate to rotate and form a pushing state with the arc-shaped extrusion plate, so that the side baffle plate 2 gives the steel frame a pulling force, so that the two steel frames are tightly connected.

[0013] Furthermore, one side of the upper arc frame and the lower arc frame is hingedly connected. After being installed on the steel frame and formed into a package, the side away from the hinge is connected with bolts, thereby forming a circular ring.

[0014] The present invention is a method for using a welding device for steel structure factory building construction, comprising the following steps: S1: Install the upper arc frame and the lower arc frame onto the steel frame through the positioning clamping mechanism, and connect one side of the upper arc frame and the lower arc frame with bolts to form a surrounding frame on the outside of the steel frame; S2: Start the preheating mechanism to preheat the steel frame welding part, and simultaneously start the synchronous belt assembly to drive the heat transfer roller to rotate, and clean and level the welding part; S3: Start the rotary motor to drive the upper arc frame and the lower arc frame to rotate 180 degrees, so that the preheating mechanism and the welding head can be switched. Driven by the upper arc frame, the arc push plate generates thrust on the arc extrusion plate, pushing the corresponding steel frame to move, reducing the expansion of the weld caused by thermal expansion; S4: The welding position is adjusted by the welding gun moving mechanism and the steel frame is welded at a uniform speed, and the preheating mechanism is simultaneously started to preheat the other side of the steel frame; S5: After welding is completed on one side of the steel frame, rotate 180 degrees, adjust the position of the preheating mechanism and the welding gun, and heat the preheating mechanism and the welded side of the steel frame to reduce the temperature drop rate. At the same time, the heat transfer roller is driven by the synchronous belt assembly to rotate to clean and level the welded area. After a certain period of time, weld the preheated area on the other side by welding. S6: After completing welding on one side of the steel frame in the above manner, the preheating mechanism is used to replenish the temperature of the weld to reduce the rate of temperature loss at the weld. Similarly, the multi-side welding operation of the steel frame is completed. S7: After all welding operations are completed, stay for two to three hours to keep the welds warm, then remove the enclosure from under the steel frame to complete the welding operation of the steel frame.

[0015] The present invention has the following beneficial effects: (1) Compared with the traditional handheld welding method, the present invention adopts a fixed welding method, that is, a frame is used to wrap the welding part of the rod frame, and at the same time, it is fixed to the corresponding two steel frames to be welded, and a welding gun moving mechanism is used to drive the welding to move. Therefore, after adjusting the welding position of the welding gun, the welding operation can be completed mechanically. No manual operation is required during the process, which reduces the damage to the health of the operator. At the same time, the movement of the welding gun is driven by the movement of the screw, which can ensure the uniformity of the movement of the welding gun and the welding effect.

[0016] (2) The present invention provides a preheating mechanism in the enclosure to preheat the steel frame, thereby improving the subsequent welding effect. At the same time, the preheating mechanism can replenish the temperature of the weld after welding is completed, thereby reducing the rate of temperature loss at the weld, and further ensuring the welding effect. At the same time, by providing a hook groove on the outer side of the heat-conducting roller on the preheating mechanism, a circular movement state is formed under the action of the synchronous belt assembly. In this state, under the joint action of the adjusting electric push rod, when preheating or replenishing the temperature of the steel frame, the weld is cleaned and leveled, thereby reducing the phenomenon of welding defects or cracks caused by burrs or impurities, and ensuring the welding effect of the steel frame.

[0017] (3) The present invention provides an arc-shaped extrusion plate and an arc-shaped push plate, and under the action of the push spring, after the steel frames are preheated, a thrust is given to one of the steel frames, so that the steel frame moves toward the other steel frame, thereby avoiding the increase in the gap between the two steel frames caused by thermal expansion during preheating, and also avoiding the gap between the steel frames caused by placement, thereby ensuring the welding effect of the steel frames while ensuring that the two steel frames are tightly connected.

[0018] (4) The present invention wraps the periphery of the welding part with a frame, so that the welding part is in a relatively closed environment, thereby reducing the influence of the external environment on welding and reducing the temperature loss rate of the welding part. At the same time, the frame can insulate the weld after welding, thereby ensuring the welding effect of the steel frame.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional view of the present invention; Figure 3 Schematic diagram of the expanded structure of the upper arc frame and the lower arc frame in the present invention; Figure 4 Schematic diagram of the structure of the lower arc frame in the present invention; Figure 5 Schematic diagram of the structure of the arc-shaped extruded plate in the present invention; Figure 6 It is a structural schematic diagram of the positioning and clamping mechanism of the present invention; Figure 7 Schematic diagram of the cross-sectional structure of the mounting frame of the present invention; Figure 8 Schematic diagram of the connection structure between the heat transfer roller and the synchronous belt assembly in the present invention Figure 9 It is a schematic diagram of the connection structure between the rotating motor and the lower arc frame in the present invention.

[0022] In the accompanying drawings, the components represented by the reference numerals are as follows: In the figure: 1. Steel frame; 2. Enclosure; 201. Side baffle 1; 202. Side baffle 2; 203. Upper arc frame; 204. Lower arc frame; 3. Welding gun; 4. Welding gun moving mechanism; 5. Positioning and clamping mechanism; 6. Rotating motor; 7. Preheating mechanism; 701. Adjusting electric push rod; 702. Mounting frame; 703. Heat transfer roller; 704. Heating plate; 8. Synchronous belt assembly; 9. Arc extrusion plate; 10. Arc fixing bar; 11. Arc push plate; 12. Push spring. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1-9As shown, the present invention is a welding device for steel structure factory building construction, including a frame 2 arranged on a steel frame 1, the frame 2 is composed of a side baffle 1 201, a side baffle 202, an upper arc frame 203 and a lower arc frame 204, which is wrapped around the periphery of the steel frame 1 and is used to reduce interference from the external environment during welding, wherein the upper arc frame 203 and the lower arc frame 204 are in a state of rotational connection with the side baffle 1 201 and the side baffle 2 202; a welding gun 3 is installed on the lower arc frame 204 for welding the steel frame 1, and a preheating mechanism 7 is provided on the upper arc frame 203, which is used to The steel frame 1 is preheated, and the preheating mechanism 7 and the welding gun 3 are arranged on the opposite side of the steel frame 1. One side of the upper arc frame 203 and the lower arc frame 204 are hingedly connected. After being installed on the steel frame 1 and forming a package, the side away from the hinge is connected by bolts. Thus, the upper arc frame 203 and the lower arc frame 204 form a circular ring. In the present invention, the side baffle 202 is composed of two arc-shaped side panels 2, and the side baffle 1 201 is composed of two arc-shaped side panels 1. By setting it in this way, the upper arc frame 203 and the lower arc frame 204 can be easily separated, and it is also convenient to install the entire frame 2 on the steel frame 1.

[0025] A welding gun moving mechanism 4 is provided on the lower arc frame 204. The welding gun moving mechanism 4 consists of a transverse screw moving assembly, a moving frame, a thumb electric push rod, a mounting frame 702 and a rotating motor. The transverse screw moving assembly drives the welding gun 3 to move transversely, and the distance between the welding gun 3 and the steel frame 1 is adjusted by the thumb electric push rod. The welding angle of the welding gun 3 is adjusted by the rotating motor, thereby being able to weld the steel frame 1 at a uniform speed. The transverse screw moving assembly adopts the existing technology, which is composed of a transverse moving motor and a transverse moving screw. The transverse moving motor drives the transverse moving screw to rotate, and the moving frame is threadedly connected to the moving screw. Under the limiting action of the lower arc frame 204, it moves horizontally when the transverse moving screw rotates, and then drives the welding gun 3 to move transversely. The moving frame is divided into two sections, which are connected by the thumb electric push rod. The lower section is connected to the transverse moving screw, and the upper section is rotationally connected to the welding gun 3.

[0026] The two side guard plates 201 and 202 are both provided with a positioning clamping mechanism 5, which consists of a bidirectional screw lateral movement assembly, two clamping frames, a bidirectional screw longitudinal movement assembly and two clamping plates. The bidirectional screw lateral movement assembly is used to drive the two clamping frames to move, and is used to clamp the steel frame 1 in the horizontal direction. The bidirectional screw longitudinal movement assembly is arranged on the clamping frame, which is used to drive the two clamping plates to clamp the top and bottom of the steel frame 1 to complete the clamping in the vertical direction, thereby fixing the side guard plate 201 and the side guard plate 202 to the steel frame 1 in a fixed connection state. The bidirectional screw lateral movement assembly and the bidirectional screw longitudinal movement assembly are both constructed by existing technology, and the two structures are similar. Both are composed of bidirectional screws, and the bidirectional screws are provided with threads in opposite directions, which synchronously drive the two clamping frames or the two clamping plates to move in the direction of approaching each other or in the direction of moving away from each other when rotating. In the present invention, one end of the bidirectional screw is connected with an inner hexagonal screw head, and the operator drives the bidirectional screw to rotate by a hexagonal wrench.

[0027] An annular T-slot is provided on the side baffle 201, and a T-shaped arc bar is installed on both the upper arc frame 203 and the lower arc frame 204. The T-shaped arc bar is rotatably connected to the annular T-slot. A rotating motor 6 is installed on the side baffle 201, and the rotating motor 6 is engaged with the T-shaped arc bar through a gear to drive the upper arc frame 203 and the lower arc frame 204 to rotate. An arc rack is provided on the T-shaped arc bar, and a circular gear is sleeved on the output shaft of the rotating motor 6, which is engaged with the arc rack.

[0028] The preheating mechanism 7 is composed of an adjusting electric push rod 701, a mounting frame 702, a heat-conducting roller 703 and a heating plate 704. The adjusting electric push rod 701 is mounted on the upper arc frame 203, the mounting frame 702 is arranged in the surrounding frame 2, the mounting frame 702 is connected to the telescopic shaft of the adjusting electric push rod 701, the heat-conducting roller 703 is arranged on the mounting frame 702, the heating plate 704 is arranged on the mounting frame 702, and the heating plate 704 is in contact with the heat-conducting roller 703. During use, the heat-conducting roller 703 is in contact with the steel frame 1 to transfer the heat generated by the heating plate 704 to the heat-conducting roller 703. The heat is conducted to the steel frame 1 to complete the preheating of the steel frame 1. The number of heat-conducting rollers 703 is set to multiple, and a synchronous belt assembly 8 is provided on the mounting frame 702. The synchronous belt assembly 8 is used to drive multiple heat-conducting rollers 703 to form a circular movement on the mounting frame 702. The surface of the heat-conducting roller 703 is provided with a hook groove, and the movement of the heat-conducting roller 703 is used to grind the surface of the steel frame 1. The synchronous belt assembly 8 is constructed using existing technology, and the end of the heat-conducting roller 703 that contacts the synchronous belt assembly is made of insulating material to reduce the impact of high temperature on the synchronous belt assembly 8.

[0029] The side baffle 202 is composed of two arc-shaped side panels 2, both of which are provided with T-shaped arc grooves, and the upper arc frame 203 and the lower arc frame 204 are both installed with T-shaped arc bars 2, which are slidably connected to the T-shaped arc grooves. The upper arc frame 203 and the lower arc frame 204 are both provided with T-shaped slide grooves, and T-shaped sliders are slidably installed in the T-shaped slide grooves. The T-shaped arc block is connected to the T-shaped arc bar 2, which is used to enable the side baffle 202 to be in a relatively movable state while being able to rotate with the upper arc frame 203 and the lower arc frame 204.

[0030] An arc-shaped extrusion plate 9 is provided in the lower arc frame 204, and the arc-shaped extrusion plate 9 is connected to the side baffle 202. An arc-shaped fixing bar 10 is installed on the upper arc frame 203, and a connecting rod is slidably installed on the arc-shaped fixing bar 10. An arc-shaped pushing plate 11 is provided on one side of the arc-shaped fixing bar 10, and the arc-shaped pushing plate 11 is connected to the connecting rod. A pushing spring 12 is provided on the connecting rod. The pushing spring 12 is used to push the arc-shaped pushing plate 11 to return to its original state when it is not subjected to external force. The thickness of the two sides of the arc-shaped extrusion plate 9 is the same, and the thickness of both sides is smaller than the thickness of the middle part.

[0031] In the initial state, one side of the two steel frames 1 is in contact. After one side of the steel frames 1 is preheated by the preheating mechanism 7, in order to prevent the steel frames 1 from thermal expansion, the upper arc frame 203 and the lower arc frame 204 are driven to rotate by the rotating motor 6, thereby causing the arc-shaped push plate 11 to rotate and form a pushing state with the arc-shaped extrusion plate 9, so that the side baffle 202 gives the steel frames 1 a pulling force, so that the two steel frames 1 are tightly connected.

[0032] When in use, the enclosure 2 is installed on the steel frame, and the enclosure 2 is wrapped around the welds of the steel frame to form a protective measure on the outside. Then, the electric push rod 701 can be started to adjust the position of the mounting frame 702 so that the heat-conducting roller 703 contacts the surface of the steel frame. Then, the heat-conducting roller 703 is heated by the heating plate 704, and the steel frame is preheated by the heat-conducting roller 703. At the same time, the heat-conducting roller 703 is driven to move by the synchronous belt assembly 8, and the welds of the steel frame are cleaned and leveled by the heat-conducting roller 703. After the preheating is completed, the upper arc frame 203 and the lower arc frame 203 are driven to rotate 180 degrees by the rotating motor 6. Align the welding gun 3 with the welding point of the steel frame, and then drive the welding gun 3 to move through the welding gun moving mechanism 4 to weld the steel frame at a uniform speed. During the welding operation, the other side of the steel frame is preheated by the preheating mechanism 7, thereby improving the welding efficiency. After the welding is completed, the position of the preheating mechanism 7 and the welding gun 3 is adjusted, and the preheating mechanism 7 is used to supplement the temperature of the welded part to avoid excessive temperature loss at the welded part, thereby ensuring the welding effect of the steel frame. Similarly, the multi-sided welding operation of the steel frame is completed in sequence. After the welding is completed, the frame 2 is left for two to three hours before being removed to keep the welded part warm, thereby ensuring the stability of the steel frame welding.

[0033] The present invention provides a method for using a welding device for steel structure factory building construction, comprising the following steps: S1: Install the upper arc frame 203 and the lower arc frame 204 onto the steel frame 1 through the positioning and clamping mechanism 5, and connect one side of the upper arc frame 203 and the lower arc frame 204 with bolts to form a surrounding frame 2 on the outside of the steel frame 1; S2: Start the preheating mechanism 7 to preheat the weld of the steel frame 1, and simultaneously start the synchronous belt assembly 8 to drive the heat transfer roller 703 to rotate, so as to clean and level the weld; S3: Start the rotary motor 6 to drive the upper arc frame 203 and the lower arc frame 204 to rotate 180 degrees, so that the preheating mechanism 7 and the welding head are switched in position. Driven by the upper arc frame 203, the arc-shaped push plate 11 generates a thrust on the arc-shaped extrusion plate 9, pushing the corresponding steel frame 1 to move, thereby reducing the expansion of the weld caused by thermal expansion; S4: The welding position is adjusted by the welding gun moving mechanism 4 and the steel frame 1 is welded at a uniform speed. The preheating mechanism 7 is simultaneously started to preheat the other side of the steel frame 1. S5: After the welding of one side of the steel frame 1 is completed, the steel frame 1 is rotated 180 degrees, and the positions of the preheating mechanism 7 and the welding gun 3 are adjusted. The preheating mechanism 7 contacts the welded side of the steel frame 1 to heat it and reduce the temperature drop rate. At the same time, the heat conduction roller 703 is driven to rotate by the synchronous belt assembly 8 to clean and level the welded area. After a certain period of time, the preheated area on the other side is welded. S6: After welding is completed on one side of the steel frame 1 in the above manner, the preheating mechanism 7 is used to heat the weld to reduce the temperature loss rate of the weld. Similarly, the multi-side welding operation of the steel frame 1 is completed. S7: After all welding operations are completed, stay for two to three hours to keep the welds warm, then remove the enclosure 2 from the steel frame 1 to complete the welding operation of the steel frame 1.

[0034] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A welding device for steel structure factory building construction, comprising a frame (2) arranged on a steel frame (1), characterized in that: The frame (2) is composed of a side baffle plate 1 (201), a side baffle plate 2 (202), an upper arc frame (203) and a lower arc frame (204), which is wrapped around the periphery of the steel frame (1) and is used to reduce interference from the external environment during the welding process, wherein the upper arc frame (203) and the lower arc frame (204) are in a state of rotational connection with the side baffle plate 1 (201) and the side baffle plate 2 (202); A welding gun (3) is installed on the lower arc frame (204) for welding the steel frame (1), and a preheating mechanism (7) is provided on the upper arc frame (203). The preheating mechanism (7) is used to preheat the steel frame (1), and the preheating mechanism (7) and the welding gun (3) are arranged on opposite sides of the steel frame (1).

2. A welding device for steel structure factory building construction according to claim 1, characterized in that: A welding gun moving mechanism (4) is provided on the lower arc frame (204). The welding gun moving mechanism (4) is composed of a transverse screw moving assembly, a moving frame, a thumb electric push rod, a mounting frame (702) and a rotating motor. The transverse screw moving assembly drives the welding gun (3) to move transversely, the thumb electric push rod is used to adjust the distance between the welding gun (3) and the steel frame (1), and the rotating motor is used to adjust the welding angle of the welding gun (3), thereby being able to weld the steel frame (1) at a uniform speed.

3. A welding device for steel structure factory building construction according to claim 2, characterized in that: A positioning clamping mechanism (5) is provided on both the side baffle 1 (201) and the side baffle 2 (202). The positioning clamping mechanism (5) is composed of a bidirectional screw lateral movement component, two clamping frames, a bidirectional screw longitudinal movement component and two clamping plates. The bidirectional screw lateral movement component is used to drive the two clamping frames to move, and is used to clamp the steel frame (1) in the horizontal direction. The bidirectional screw longitudinal movement component is provided on the clamping frame, and is used to drive the two clamping plates to clamp the top and bottom of the steel frame (1), completing the clamping in the vertical direction, thereby fixing the side baffle 1 (201) and the side baffle 2 (202) to the steel frame (1).

4. A welding device for steel structure factory building construction according to claim 3, characterized in that: An annular T-groove is provided on the side baffle (201), and a T-shaped arc strip is installed on both the upper arc frame (203) and the lower arc frame (204). The T-shaped arc strip is rotatably connected to the annular T-groove. A rotating motor (6) is installed on the side baffle (201), and the rotating motor (6) is engaged with the T-shaped arc strip through a gear to drive the upper arc frame (203) and the lower arc frame (204) to rotate.

5. A welding device for steel structure factory building construction according to claim 4, characterized in that: The preheating mechanism (7) is composed of an adjusting electric push rod (701), a mounting frame (702), a heat-conducting roller (703) and a heating plate (704). The adjusting electric push rod (701) is mounted on the upper arc frame (203). The mounting frame (702) is arranged in the surrounding frame (2). The mounting frame (702) is connected to the telescopic shaft of the adjusting electric push rod (701). The heat-conducting roller (703) is arranged on the mounting frame (702). The heating plate (704) is arranged on the mounting frame (702). The heating plate (704) is in contact with the heat-conducting roller (703). During use, the heat-conducting roller (703) is in contact with the steel frame (1) and is used to conduct heat generated by the heating plate (704) to the steel frame (1), thereby completing the preheating of the steel frame (1).

6. A welding device for steel structure factory building construction according to claim 5, characterized in that: The number of heat-conducting rollers (703) is set to be multiple, and a synchronous belt assembly (8) is provided on the mounting frame (702). The synchronous belt assembly (8) is used to drive the multiple heat-conducting rollers (703) to form a circular movement state on the mounting frame (702). The surface of the heat-conducting roller (703) is provided with a hook groove, and the movement of the heat-conducting roller (703) is used to grind the surface of the steel frame (1).

7. A welding device for steel structure factory building construction according to claim 6, characterized in that: The side baffle plate 2 (202) is composed of two arc-shaped side plates 2, each of which is provided with a T-shaped arc groove, and each of the upper arc frame (203) and the lower arc frame (204) is provided with a T-shaped arc bar 2, and the T-shaped arc bar 2 is slidably connected to the T-shaped arc groove, and each of the upper arc frame (203) and the lower arc frame (204) is provided with a T-shaped slide groove, and a T-shaped slider is slidably installed in the T-shaped slide groove, and the T-shaped arc block is connected to the T-shaped arc bar 2, so that the side baffle plate 2 (202) is in a state of being able to rotate with the upper arc frame (203) and the lower arc frame (204), and is also in a state of being able to move relatively.

8. A welding device for steel structure factory building construction according to claim 7, characterized in that: An arc-shaped extrusion plate (9) is provided in the lower arc frame (204), and the arc-shaped extrusion plate (9) is connected to the second side baffle (202). An arc-shaped fixing strip (10) is installed on the upper arc frame (203), and a connecting rod is slidably installed on the arc-shaped fixing strip (10). An arc-shaped push plate (11) is provided on one side of the arc-shaped fixing strip (10), and the arc-shaped push plate (11) is connected to the connecting rod. A push spring (12) is provided on the connecting rod. The push spring (12) is used to push the arc-shaped push plate (11) to return to its original state when it is not subjected to external force. The thickness of the arc-shaped extrusion plate (9) is the same on both sides, and the thickness of both sides is smaller than the thickness of the middle part.

9. A welding device for steel structure factory building construction according to claim 8, characterized in that: In the initial state, one side of the two steel frames (1) is in contact. After one side of the steel frame (1) is preheated by the preheating mechanism (7), in order to prevent the steel frame (1) from thermal expansion, the upper arc frame (203) and the lower arc frame (204) are driven to rotate by the rotating motor (6), thereby causing the arc-shaped push plate (11) to rotate and form a pushing state with the arc-shaped extrusion plate (9), so that the side baffle plate 2 (202) gives the steel frame (1) a pulling force, so that the two steel frames (1) are tightly connected.

10. A welding device for steel structure factory building construction according to claim 9, characterized in that: One side of the upper arc frame (203) and the lower arc frame (204) are hingedly connected. After being installed on the steel frame (1) and forming a package, the side away from the hinge is bolted, thereby forming a circular ring with the upper arc frame (203) and the lower arc frame (204).

11. A method for using a welding device for steel structure factory building construction according to claim 10, comprising the following steps: S1: The upper arc frame (203) and the lower arc frame (204) are mounted on the steel frame (1) through the positioning clamping mechanism (5), and one side of the upper arc frame (203) and the lower arc frame (204) are connected by bolts to form a surrounding frame (2) on the outside of the steel frame (1); S2: Start the preheating mechanism (7) to preheat the weld of the steel frame (1), and simultaneously start the synchronous belt assembly (8) to drive the heat transfer roller (703) to rotate, and clean and level the weld; S3: Start the rotating motor (6) to drive the upper arc frame (203) and the lower arc frame (204) to rotate 180 degrees, so that the preheating mechanism (7) and the welding head are switched in position. Driven by the upper arc frame (203), the arc push plate (11) generates a thrust on the arc extrusion plate (9), pushing the corresponding steel frame (1) to move, thereby reducing the expansion of the weld caused by thermal expansion; S4: adjusting the welding position by the welding gun moving mechanism (4) and welding the steel frame (1) at a uniform speed, and simultaneously starting the preheating mechanism (7) to preheat the other side of the steel frame (1); S5: After the welding of one side of the steel frame (1) is completed, the steel frame (1) is rotated 180 degrees, and the positions of the preheating mechanism (7) and the welding gun (3) are adjusted. The preheating mechanism (7) contacts the welded side of the steel frame (1) to heat it and reduce the temperature drop rate. At the same time, the heat conduction roller (703) is driven to rotate by the synchronous belt assembly (8) to clean and level the welded area. After a certain period of time, the preheated area on the other side is welded by welding. S6: After completing welding on one side of the steel frame (1) in accordance with the above method, the preheating mechanism 7 is used to heat the welded portion to reduce the rate of temperature loss at the welded portion. Similarly, the multi-faceted welding operation of the steel frame (1) is completed. S7: After all welding operations are completed, stay for two to three hours to keep the welds warm, then remove the enclosure (2) from the steel frame (1), completing the welding operation of the steel frame (1).

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