Steel structure assembling and welding system

Abstract

A steel structure assembling and welding system comprises a welding positioning device (200), a conveying device (201) and a welding device (202), the welding positioning device (200) comprises a positioning conveyor (1), a set of transverse plate clamping sliding tables (2) and a set of vertical plate positioning mechanisms, and the set of transverse plate clamping sliding tables (2) are sequentially arranged and installed on a rack of the positioning conveyor (1); the T-shaped steel positioning device has the advantages that the T-shaped steel positioning speed is high, the T-shaped steel can be conveyed to a welding station in a positioning state after being positioned, and the labor intensity of workers is relieved. The T-shaped steel conveying speed is high, position deviation cannot occur when the T-shaped steel is conveyed, and follow-up welding is facilitated. T-shaped steel can be continuously welded, the welding speed is high, T-shaped steel positioning is accurate, and the product quality is good.

Description

Technical Field

[0001] The utility model relates to the field of T-shaped steel production equipment, in particular to a steel structure assembly welding system. Background Art

[0002] At present, when assembling and welding the existing T-shaped steel, it needs to be positioned by multiple positioning devices. After positioning, the workers use welding guns to weld the vertical plate and the horizontal plate of the T-shaped steel. When assembling the T-shaped steel, the workers use many clamps, which is a lot of work. There is a lack of a positioning device that can quickly position the horizontal plate and the vertical plate at the same time and can be transported to the welding station.

[0003] Before welding the T-shaped steel, the assembled T-shaped steel needs to be transported to the welding station for welding. During transportation, the vertical plate of the T-shaped steel is prone to offset when the existing conveying device is docked with the assembly device in the previous step, affecting the subsequent welding. There is a lack of a positioning conveying device that can guide the entering vertical plate of the T-shaped steel and keep it transported vertically forward.

[0004] When welding T-shaped steel, it is necessary to accurately clamp and position the T-shaped steel at the welding point. The existing positioning method mostly uses a clamp for multi-point clamping and positioning. After each welding, the clamp needs to be removed to remove the T-shaped steel. The production efficiency is low and cannot adapt to the production needs of the factory. Utility Model Content

[0005] The purpose of the utility model is to provide a steel structure assembly welding system to solve the above-mentioned shortcomings.

[0006] The utility model comprises a welding positioning device, a conveying device and a welding device.

[0007] The welding positioning device includes a positioning conveyor, a set of horizontal plate clamping slides and a set of vertical plate positioning mechanisms.

[0008] A set of cross-plate clamping slides are arranged in sequence and installed on the frame of the positioning conveyor. The slider of the cross-plate clamping slide limits the position of the T-shaped steel cross-plate from the side.

[0009] The vertical plate positioning mechanism includes a side limit arm and a lifting slide.

[0010] The side limit arm is installed on the frame of the positioning conveyor, the lifting slide is installed on one side of the positioning conveyor, a limit cylinder is arranged on the slider of the lifting slide, a limit roller is arranged at the end of the piston rod of the limit cylinder, and a vertical plate moving gap is formed between the side limit arm and the limit roller;

[0011] The conveying device includes a transfer conveyor and a pair of mirror-distributed vertical plate limit mechanisms.

[0012] The vertical plate limiting mechanism includes a distance adjustment slide, a limiting shell and a set of limiting rollers.

[0013] The distance-adjusting slide is installed on the frame of the transfer conveyor, and the two ends of the limit housing are respectively provided with oblique openings, and a roller mounting groove is opened on the limit housing. A group of limit rollers are sequentially arranged and installed in the roller mounting groove of the limit housing, and the limit housing is installed on the slider of the distance-adjusting slide, and a vertical plate passing area is formed between a pair of vertical plate limit mechanisms;

[0014] The welding device includes a pair of telescopic clamping mechanisms distributed in a mirror image, a pair of welding guns, a lifting frame and an upper pressure cylinder.

[0015] The telescopic clamping mechanism comprises a side pressure cylinder, a pair of lower pulleys and an upper pulley, a pulley mounting plate is arranged at the end of the piston rod of the side pressure cylinder, a pair of lower pulleys are mounted on the bottom surface of the pulley mounting plate, and the upper pulley is mounted on the top surface of the pulley mounting plate and is located between the pair of lower pulleys; a pair of welding guns are mounted on a horizontal ground through a welding gun bracket, an upper pressure cylinder is mounted on the top of a lifting frame, an upper pressure roller is arranged at the end of the piston rod of the upper pressure cylinder, and the lifting frame is located between the telescopic clamping mechanism and the welding gun;

[0016] The discharging end of the positioning conveyor is connected with the feeding end of the transfer conveyor, and the telescopic clamping mechanism is located at one side of the discharging end of the transfer conveyor.

[0017] The positioning conveyor is a roller conveyor; the cross-plate clamping slide is a positive and negative linear slide, a pair of limit sliders are arranged on the screw rod of the positive and negative linear slide, and the cross-plate clamping slide is located between a pair of conveying rollers of the positioning conveyor; a pulley mounting groove is opened on the limit slider, and a group of cross-plate guide pulleys are arranged in the pulley mounting groove.

[0018] The side limit arm is composed of a vertical fixed rod and a group of adjustment arms. The vertical fixed rod is installed on the frame of the positioning conveyor. A group of adjustment arms are arranged in sequence and detachably installed on the vertical fixed rod. A pulley is arranged at the end of the adjustment arm.

[0019] The lifting slide is a screw slide; the limit cylinder is horizontally installed on the slider of the lifting slide; a U-shaped roller frame is arranged at the end of the piston rod of the limit cylinder, and the limit roller is installed in the U-shaped roller frame.

[0020] The ends of the limiting shells of a pair of vertical plate limiting mechanisms form a V-shaped guiding opening.

[0021] The pitch-adjustable slide comprises a pair of guide rods, a pitch-adjustable lead screw and a component fixing frame, a lead screw nut and a pair of linear bearings are arranged on the component fixing frame, the pitch-adjustable lead screw is installed in the lead screw nut, the guide rod is installed in the linear bearing, the component fixing frame is installed on the frame of the transfer conveyor, and the limit housing is installed on the ends of the pair of guide rods and the pitch-adjustable lead screw; the component fixing frame is installed on the side wall of the frame of the transfer conveyor through a pair of L-shaped brackets; a hand wheel is arranged at the end of the pitch-adjustable lead screw.

[0022] The transfer conveyor is a roller conveyor; a pair of mirror-distributed transverse plate limit mechanisms are provided at the discharge end of the transfer conveyor, and the transverse plate limit mechanisms include a guide block, a side limit guide rod and a side limit roller; a guide hole is provided on the guide block, and the side limit guide rod is located in the guide hole; a locking screw is provided on the top of the guide block, and the side limit guide rod is pressed from above by the locking screw; a roller frame is provided at the end of the side limit guide rod, and the side limit roller is installed in the roller frame; a rectangular hole is provided on the guide block, and the cross-section of the side limit guide rod is rectangular, and the side limit guide rod is located in the rectangular hole of the guide block and slides back and forth; a threaded hole is provided on the top of the guide block, and the locking screw is screwed into the threaded hole to press the side limit guide rod.

[0023] The pulley mounting plate is an isosceles triangle plate, and a pair of lower pulleys are mounted at two feet of the bottom surface of the isosceles triangle plate.

[0024] The lifting frame is composed of a pair of guide columns and a top plate. The pair of guide columns are symmetrically distributed, and the top plate is installed on the top of the guide columns. An upper pressure slider is slidably arranged on the pair of guide columns. The cylinder barrel of the upper pressure cylinder is installed in the middle of the top plate. The piston rod of the upper pressure cylinder passes through the top plate and is fixedly connected with the upper pressure slider. An upper pressure roller is arranged at the bottom of the upper pressure slider, and the upper pressure slider is driven by the upper pressure cylinder to slide up and down along the pair of guide columns; guide holes are respectively opened at both ends of the upper pressure slider, and is installed on the guide columns through the guide holes.

[0025] A drag block with a right-angled triangle cross-section is provided on the top of the welding gun bracket, a guide cylinder is provided on the inclined surface of the drag block, an L-shaped mounting plate is provided at the end of the piston rod of the guide cylinder, an adjusting rod is provided on the guide cylinder, and the barrel of the welding gun is installed on the adjusting rod through a cross adjusting sleeve; the cross adjusting sleeve is composed of a horizontal tube and a vertical tube, the vertical tube is welded to the horizontal tube, the barrel of the welding gun is inserted into the vertical tube and fixed by a locking screw, and the horizontal tube is sleeved on the adjusting rod and fixed by a locking screw; a discharging conveyor is provided on one side of the welding gun; the discharging conveyor is a roller conveyor.

[0026] The utility model has the advantages that the T-shaped steel can be positioned quickly, and after positioning, the T-shaped steel can be transported to the welding station in a positioned state, thereby reducing the labor intensity of the staff. The T-shaped steel can be transported quickly, and the T-shaped steel will not be offset during transportation, which is convenient for subsequent welding. The T-shaped steel can be welded continuously, the welding speed is fast, the T-shaped steel is accurately positioned, and the product quality is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model.

[0028] Figure 2 It is a structural schematic diagram of the welding positioning device of the utility model.

[0029] Figure 3 It is a structural schematic diagram of the utility model when positioning T-shaped steel.

[0030] Figure 4 It is a structural schematic diagram of the conveying device of the utility model.

[0031] Figure 5 It is a structural schematic diagram of the utility model when conveying T-shaped steel.

[0032] Figure 6 It is a structural schematic diagram of the welding device of the utility model.

[0033] Figure 7 It is a structural schematic diagram of the telescopic clamping mechanism of the utility model.

[0034] Figure 8 It is a structural schematic diagram of a welding gun of the utility model.

[0035] Fig. 9 It is a structural schematic diagram of the utility model when welding T-shaped steel. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", etc. appear in the description of the present invention, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0040] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting" and "connection" 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 the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] As shown in the accompanying drawings, the utility model includes a welding positioning device 200, a conveying device 201 and a welding device 202.

[0042] The welding positioning device 200 includes a positioning conveyor 1, a set of horizontal plate clamping slides 2 and a set of vertical plate positioning mechanisms.

[0043] A set of cross-plate clamping slides 2 are arranged in sequence and installed on the frame of the positioning conveyor 1. The slider of the cross-plate clamping slide 2 limits the position of the T-shaped steel cross-plate from the side.

[0044] The vertical plate positioning mechanism includes a side limit arm 3 and a lifting slide 4.

[0045] The side limit arm 3 is installed on the frame of the positioning conveyor 1, the lifting slide 4 is installed on one side of the positioning conveyor 1, a limit cylinder 5 is arranged on the slider of the lifting slide 4, a limit roller 6 is arranged at the end of the piston rod of the limit cylinder 5, and a vertical plate moving gap is formed between the side limit arm 3 and the limit roller 6;

[0046] The conveying device 201 includes a transfer conveyor 20 and a pair of vertical plate limiting mechanisms distributed in a mirror image.

[0047] The vertical plate limiting mechanism includes a distance adjustment slide, a limiting housing 22 and a set of limiting rollers 23.

[0048] The distance-adjusting slide is installed on the frame of the transfer conveyor 20, and the two ends of the limit housing 22 are respectively provided with oblique openings, and the limit housing 22 is provided with a roller installation groove, and a group of limit rollers 23 are sequentially arranged and installed in the roller installation groove of the limit housing 22, and the limit housing 22 is installed on the slider of the distance-adjusting slide, and a vertical plate passing area is formed between a pair of vertical plate limit mechanisms;

[0049] The welding device 202 includes a pair of telescopic clamping mechanisms arranged in a mirror image, a pair of welding guns 50, a lifting frame 51 and an upper pressure cylinder 52.

[0050] The telescopic clamping mechanism includes a side pressure cylinder 102, a pair of lower pulleys 103 and an upper pulley 104, a pulley mounting plate is provided at the end of the piston rod of the side pressure cylinder 102, a pair of lower pulleys 103 are installed on the bottom surface of the pulley mounting plate, and the upper pulley 104 is installed on the top surface of the pulley mounting plate and is located between the pair of lower pulleys 103; a pair of welding guns 50 are installed on a horizontal ground through a welding gun bracket, an upper pressure cylinder 52 is installed on the top of a lifting frame 51, an upper pressure roller 107 is provided at the end of the piston rod of the upper pressure cylinder 52, and the lifting frame 51 is located between the telescopic clamping mechanism and the welding gun 50;

[0051] The discharge end of the positioning conveyor 1 is connected to the feed end of the transfer conveyor 20 , and the telescopic clamping mechanism is located at one side of the discharge end of the transfer conveyor 20 .

[0052] The positioning conveyor 1 is a roller conveyor; the cross-plate clamping slide 2 is a positive and negative linear slide, a pair of limit sliders 7 are arranged on the screw rod of the positive and negative linear slide, and the cross-plate clamping slide 2 is located between a pair of conveying rollers of the positioning conveyor 1; a pulley mounting groove is opened on the limit slider 7, and a group of cross-plate guide pulleys are arranged in the pulley mounting groove.

[0053] The side limit arm 3 is composed of a vertical fixed rod and a group of adjustment arms. The vertical fixed rod is installed on the frame of the positioning conveyor 1. A group of adjustment arms are arranged in sequence and detachably installed on the vertical fixed rod. A pulley is provided at the end of the adjustment arm.

[0054] The lifting slide 4 is a screw slide; the limit cylinder 5 is horizontally installed on the slider of the lifting slide 4; the piston rod end of the limit cylinder 5 is provided with a U-shaped roller frame, and the limit roller 6 is installed in the U-shaped roller frame.

[0055] The ends of the limiting housing 22 of a pair of vertical plate limiting mechanisms form a V-shaped guide opening.

[0056] The pitch-adjustable slide includes a pair of guide rods 24, a pitch-adjustable screw rod 25 and a component fixing frame 26. A screw nut and a pair of linear bearings are provided on the component fixing frame 26. The pitch-adjustable screw rod 25 is installed in the screw nut, the guide rod 24 is installed in the linear bearing, the component fixing frame 26 is installed on the frame of the transfer conveyor 20, and the limit housing 22 is installed at the ends of the pair of guide rods 24 and the pitch-adjustable screw rod 25; the component fixing frame 26 is installed on the side wall of the frame of the transfer conveyor 20 through a pair of L-shaped brackets; a hand wheel is provided at the end of the pitch-adjustable screw rod 25.

[0057] The transfer conveyor 20 is a roller conveyor; a pair of mirror-distributed transverse plate limiting mechanisms are provided at the discharge end of the transfer conveyor 20, and the transverse plate limiting mechanisms include a guide block 21, a side limiting guide rod 27 and a side limiting roller 28. A guide hole is provided on the guide block 21, and the side limiting guide rod 27 is located in the guide hole. A locking screw is provided on the top of the guide block 21, and the side limiting guide rod 27 is pressed from above by the locking screw. A roller frame is provided at the end of the side limiting guide rod 27, and the side limiting roller 28 is installed in the roller frame; a rectangular hole is provided on the guide block 21, and the cross-section of the side limiting guide rod 27 is rectangular. The side limiting guide rod 27 is located in the rectangular hole of the guide block 21 and slides back and forth; a threaded hole is provided on the top of the guide block 21, and the locking screw is screwed into the threaded hole to press the side limiting guide rod 27.

[0058] The pulley mounting plate is an isosceles triangle plate, and a pair of lower pulleys 103 are mounted at two feet of the bottom surface of the isosceles triangle plate.

[0059] The lifting frame 51 is composed of a pair of guide columns and a top plate. The pair of guide columns are symmetrically distributed, and the top plate is installed on the top of the guide columns. An upper pressure slider 108 is slidably arranged on the pair of guide columns. The cylinder barrel of the upper pressure cylinder 52 is installed in the middle of the top plate. The piston rod of the upper pressure cylinder 52 passes through the top plate and is fixedly connected to the upper pressure slider 108. An upper pressure roller 107 is arranged at the bottom of the upper pressure slider 108, and the upper pressure slider 108 is driven by the upper pressure cylinder 52 to slide up and down along the pair of guide columns; guide holes are respectively opened at both ends of the upper pressure slider 108, and is installed on the guide columns through the guide holes.

[0060] A drag block 109 with a right-angled triangle cross section is provided on the top of the welding gun bracket, a guide cylinder 110 is provided on the inclined surface of the drag block 109, an L-shaped mounting plate 111 is provided at the end of the piston rod of the guide cylinder 110, an adjusting rod 112 is provided on the guide cylinder 110, and the barrel of the welding gun 50 is installed on the adjusting rod 112 through a cross adjusting sleeve 113; the cross adjusting sleeve 113 is composed of a horizontal tube and a vertical tube, the vertical tube is welded to the horizontal tube, the barrel of the welding gun 50 is inserted into the vertical tube and fixed by a locking screw, and the horizontal tube is sleeved on the adjusting rod 112 and fixed by a locking screw; a discharge conveyor 114 is provided on one side of the welding gun 50; the discharge conveyor 114 is a roller conveyor.

[0061] Embodiment 1: The staff lifts the horizontal plate of the T-shaped steel to the top of the positioning conveyor 1 through the aerial crane in the factory, presses the slider of the slide 2 on the side wall of the horizontal plate through a group of horizontal plate clamping slides 2 to position it, and then lifts the vertical plate of the T-shaped steel to the horizontal plate through the aerial crane, and one side of the vertical plate rests on the pulley of the side limit arm 3, and then starts the lifting slide 4 to drive the limit cylinder 5 to move to the specified height and adapt to the vertical plate. The piston rod of the limit cylinder 5 extends out, driving the limit roller 6 to press on the vertical plate, and presses the vertical plate on the pulley of the side limit arm 3 to keep the vertical plate in a vertical state. At this time, start the positioning conveyor 1, and drive the horizontal plate and the vertical plate of the T-shaped steel to be transported to the welding station at the same time. During transportation, the horizontal plate is guided and transported by the horizontal plate guide pulley in the pulley mounting groove on the limit slider 7, and the vertical plate is guided and transported by the limit roller 6 and the pulley of the side limit arm 3, so as to ensure that the T-shaped steel will not deviate during welding.

[0062] After being positioned by the positioning device, the T-shaped steel moves to the feed end of the transfer conveyor 20 driven by the conveyor and enters through the oblique opening of the limit shell 22. Since the end of the limit shell 22 of the pair of vertical plate limit mechanisms forms a V-shaped guide opening, the feed opening is changed from large to small, which is convenient for the vertical plate of the T-shaped steel to enter. After the vertical plate of the T-shaped steel enters, a group of limit rollers 23 are used to keep the vertical plate vertical, and the T-shaped steel can move along the conveying direction of the transfer conveyor 20. By turning the hand wheel, the distance adjusting screw rod 25 is rotated in the screw rod nut to drive the limit shell 22 forward or backward to adjust the spacing between the pair of limit shells 22 to adapt to T-shaped steel vertical plates of different thicknesses. The side limit rollers 28 are used to limit and guide the side walls of the T-shaped steel cross plate to prevent the T-shaped steel cross plate from deviating during transportation. By adjusting the position of the side limit guide rod 27 in the guide hole of the guide block 21, the spacing between the pair of side limit rollers 28 is changed to adapt to T-shaped steel cross plates of different widths.

[0063] The T-shaped steel delivered by the positioning and conveying device is first clamped and positioned by the telescopic clamping mechanism. The piston rods of a pair of side pressure cylinders 102 extend at the same time, driving a pair of lower pulleys 103 and upper pulleys 104 to press on the side walls of the vertical plate of the T-shaped steel, clamping and positioning the vertical plate, and the piston rod of the upper pressure cylinder 52 extends, driving the upper pressure slider 108 to move downward, and the upper pressure roller 107 presses on the top of the vertical plate of the T-shaped steel to complete the positioning of the T-shaped steel. The T-shaped steel is continuously conveyed forward by the conveying device of the previous station and moves to the welding gun 50. The piston rod of the guide cylinder 110 extends, driving the welding gun 50 close to the junction of the vertical plate and the horizontal plate of the T-shaped steel for welding. After welding, the piston rod of the guide cylinder 110 is retracted. When the welding angle needs to be adjusted, the position of the cross adjustment sleeve 113 on the adjustment rod 112 can be adjusted to adjust the welding gun angle, and it is fixed by the locking screw after the adjustment is completed. The drag block 109 with a right triangle cross section is used to make the guide cylinder 110 have an inclined angle. After the piston rod of the guide cylinder 110 is extended, it is convenient to avoid the T-shaped steel and can adapt to T-shaped steels of various sizes. The welded T-shaped steel is output through the discharging conveyor 114.

Claims

1. A steel structure assembly welding system, characterized in that It comprises a welding positioning device (200), a conveying device (201) and a welding device (202), The welding positioning device (200) comprises a positioning conveyor (1), a set of horizontal plate clamping slides (2) and a set of vertical plate positioning mechanisms. A set of cross-plate clamping slides (2) are arranged in sequence and installed on the frame of the positioning conveyor (1). The position of the T-shaped steel cross-plate is limited from the side by the slider of the cross-plate clamping slide (2). The vertical plate positioning mechanism comprises a side limiting arm (3) and a lifting slide (4). The side limit arm (3) is installed on the frame of the positioning conveyor (1), the lifting slide (4) is installed on one side of the positioning conveyor (1), a limit cylinder (5) is arranged on the slider of the lifting slide (4), a limit roller (6) is arranged at the end of the piston rod of the limit cylinder (5), and a vertical plate moving gap is formed between the side limit arm (3) and the limit roller (6); The conveying device (201) comprises a transfer conveyor (20) and a pair of vertical plate limiting mechanisms distributed in a mirror image. The vertical plate limiting mechanism comprises a distance-adjusting slide, a limiting housing (22) and a set of limiting rollers (23). The distance-adjusting slide is mounted on a frame of a transfer conveyor (20), oblique openings are respectively arranged at both ends of a limit shell (22), a roller mounting groove is opened on the limit shell (22), a group of limit rollers (23) are sequentially arranged and mounted in the roller mounting groove of the limit shell (22), the limit shell (22) is mounted on a slider of the distance-adjusting slide, and a vertical plate passing area is formed between a pair of vertical plate limit mechanisms; The welding device (202) comprises a pair of telescopic clamping mechanisms distributed in a mirror image, a pair of welding guns (50), a lifting frame (51) and an upper pressure cylinder (52). The telescopic clamping mechanism comprises a side pressure cylinder (102), a pair of lower pulleys (103) and an upper pulley (104); a pulley mounting plate is arranged at the end of the piston rod of the side pressure cylinder (102); the pair of lower pulleys (103) are mounted on the bottom surface of the pulley mounting plate; the upper pulley (104) is mounted on the top surface of the pulley mounting plate and is located between the pair of lower pulleys (103); a pair of welding guns (50) are mounted on a horizontal ground through welding gun brackets; the upper pressure cylinder (52) is mounted on the top of a lifting frame (51); an upper pressure roller (107) is arranged at the end of the piston rod of the upper pressure cylinder (52); and the lifting frame (51) is located between the telescopic clamping mechanism and the welding gun (50); The discharge end of the positioning conveyor (1) is connected to the feed end of the transfer conveyor (20), and the telescopic clamping mechanism is located on one side of the discharge end of the transfer conveyor (20).

2. A steel structure assembly welding system according to claim 1, characterized in that: The positioning conveyor (1) is a roller conveyor; the cross-plate clamping slide (2) is a positive and negative thread linear slide, a pair of limit sliders (7) are arranged on the screw rod of the positive and negative thread linear slide, and the cross-plate clamping slide (2) is located between a pair of conveying rollers of the positioning conveyor (1); a pulley mounting groove is opened on the limit slider (7), and a group of cross-plate guide pulleys are arranged in the pulley mounting groove.

3. A steel structure assembly welding system according to claim 1, characterized in that: The side limit arm (3) is composed of a vertical fixed rod and a group of adjustment arms. The vertical fixed rod is installed on the frame of the positioning conveyor (1). The group of adjustment arms are arranged in sequence and detachably installed on the vertical fixed rod. The ends of the adjustment arms are provided with pulleys.

4. A steel structure assembly welding system according to claim 1, characterized in that: The lifting slide (4) is a screw slide; the limit cylinder (5) is horizontally installed on the slider of the lifting slide (4); the piston rod end of the limit cylinder (5) is provided with a U-shaped roller frame, and the limit roller (6) is installed in the U-shaped roller frame.

5. A steel structure assembly welding system according to claim 1, characterized in that: The ends of the limiting shells (22) of a pair of vertical plate limiting mechanisms form V-shaped guide openings.

6. A steel structure assembly welding system according to claim 1, characterized in that: The pitch-adjustable slide comprises a pair of guide rods (24), a pitch-adjustable screw rod (25) and a component fixing frame (26); a screw nut and a pair of linear bearings are arranged on the component fixing frame (26); the pitch-adjustable screw rod (25) is installed in the screw nut, the guide rod (24) is installed in the linear bearing, the component fixing frame (26) is installed on the frame of the transfer conveyor (20), and the limit housing (22) is installed on the ends of the pair of guide rods (24) and the pitch-adjustable screw rod (25); the component fixing frame (26) is installed on the side wall of the frame of the transfer conveyor (20) through a pair of L-shaped brackets; and a hand wheel is arranged at the end of the pitch-adjustable screw rod (25).

7. A steel structure assembly welding system according to claim 1, characterized in that: The transfer conveyor (20) is a roller conveyor; a pair of mirror-distributed transverse plate limiting mechanisms are arranged at the discharge end of the transfer conveyor (20), the transverse plate limiting mechanisms comprising a guide block (21), a side limiting guide rod (27) and a side limiting roller (28); a guide hole is opened on the guide block (21), the side limiting guide rod (27) is located in the guide hole, a locking screw is arranged on the top of the guide block (21), the side limiting guide rod (27) is pressed from above by the locking screw, a roller frame is arranged at the end of the side limiting guide rod (27), and the side limiting roller (28) is installed in the roller frame; a rectangular hole is opened on the guide block (21), the cross section of the side limiting guide rod (27) is rectangular, and the side limiting guide rod (27) is located in the rectangular hole of the guide block (21) and slides forward and backward; a threaded hole is opened on the top of the guide block (21), and the locking screw is screwed into the threaded hole to press the side limiting guide rod (27).

8. A steel structure assembly welding system according to claim 1, characterized in that: The pulley mounting plate is an isosceles triangle plate, and a pair of lower pulleys (103) are mounted at two feet of the bottom surface of the isosceles triangle plate.

9. A steel structure assembly welding system according to claim 1, characterized in that: The lifting frame (51) is composed of a pair of guide columns and a top plate. The pair of guide columns are symmetrically distributed. The top plate is installed on the top of the guide columns. An upper pressure slider (108) is slidably arranged on the pair of guide columns. The cylinder barrel of the upper pressure cylinder (52) is installed in the middle of the top plate. The piston rod of the upper pressure cylinder (52) passes through the top plate and is fixedly connected to the upper pressure slider (108). An upper pressure roller (107) is arranged at the bottom of the upper pressure slider (108). The upper pressure slider (108) is driven by the upper pressure cylinder (52) to slide up and down along the pair of guide columns; guide holes are respectively opened at both ends of the upper pressure slider (108), and the upper pressure slider (108) is installed on the guide column through the guide holes.

10. A steel structure assembly welding system according to claim 1, characterized in that: A drag block (109) with a right-angled triangle cross section is arranged on the top of the welding gun support, a guide cylinder (110) is arranged on the inclined surface of the drag block (109), an L-shaped mounting plate (111) is arranged at the end of the piston rod of the guide cylinder (110), an adjusting rod (112) is arranged on the guide cylinder (110), and a gun barrel of the welding gun (50) is mounted on the adjusting rod (112) through a cross adjusting sleeve (113); the cross adjusting sleeve (113) is composed of a horizontal pipe and a vertical pipe, the vertical pipe is welded to the horizontal pipe, the gun barrel of the welding gun (50) is inserted into the vertical pipe and fixed by a locking screw, and the horizontal pipe is sleeved on the adjusting rod (112) and fixed by a locking screw; a discharging conveyor (114) is arranged on one side of the welding gun (50); the discharging conveyor (114) is a roller conveyor.

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