Welding equipment for steel structure manufacturing

Abstract

The welding equipment for steel structure manufacturing comprises a machine body, a vertical groove, a first horizontal groove and a second horizontal groove are sequentially formed in the side wall of the machine body from top to bottom, a plurality of guide rods are fixedly installed in the vertical groove, a sliding plate is installed on the guide rods in a sliding mode, an adjusting screw rod is inserted into the sliding plate, and the adjusting screw rod is connected with the first horizontal groove and the second horizontal groove. And the adjusting screw rod is rotationally installed in the vertical groove, a fixing plate is installed on the outer side wall of the sliding plate, an inclination angle adjusting seat is rotationally installed on the fixing plate, and two adjusting cavities are symmetrically formed in the inclination angle adjusting seat. By freely adjusting the rotating angle of the horizontal I-shaped steel and freely adjusting the front, back, left and right inclination angles of the vertical I-shaped steel, more complex contact welding can be carried out, the application range of equipment welding is widened, the horizontal I-shaped steel is automatically centered and fixed in a horizontal synchronous clamping mode, and rapid and accurate welding can be carried out according to set data.

Description

Technical Field

[0001] The invention relates to the field of steel structure welding equipment, in particular to welding equipment for steel structure manufacturing. Background Art

[0002] Existing steel structure welding equipment usually adopts a two-dimensional horizontal welding method, that is, two I-shaped steels are horizontally clamped and connected, and then the connection is modeled by a welding head, and then welding is performed according to the modeling trajectory. However, this welding equipment can only perform plane welding, that is, the contact angle between the two I-shaped steels can only be changed within the plane, and multi-angle welding is not possible. The composition of steel structure building components is relatively complex, so the existing steel structure welding equipment has a small scope of application. In addition, when loading, the existing equipment needs manual feeding and positioning to ensure that the welding head can accurately move to the corresponding welding position according to the set data, and the operation is relatively cumbersome. Summary of the invention

[0003] The purpose of the present invention is to propose a welding device for steel structure manufacturing in order to solve the problems in the prior art that the welding can only be performed by changing the contact angle within a plane, the application range is small, and manual alignment is required, which makes the operation more troublesome.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A welding device for manufacturing steel structures comprises a machine body, a vertical groove, a first horizontal groove, and a second horizontal groove are sequentially provided on the side wall of the machine body from top to bottom, a plurality of guide rods are fixedly installed in the vertical grooves, a plurality of slide plates are slidably installed on the guide rods, an adjusting screw is inserted on the slide plate, the adjusting screw is rotatably installed in the vertical grooves, a fixed plate is installed on the outer side wall of the slide plate, an inclination adjustment seat is rotatably installed on the fixed plate, two adjusting cavities are symmetrically provided in the inclination adjustment seat, a pressure groove is provided on the inner wall of each adjusting cavity, two pressure control tubes respectively connected to the two pressure grooves are symmetrically inserted on the outer side wall of the inclination adjustment seat, and each adjusting An adjusting piston rod is sealed and slidably installed in the section cavity, and one end of each adjusting piston rod away from the pressure groove extends to the outside of the inclination adjustment seat and is rotatably installed with a clamp, a driving slide is slidably installed in the first horizontal groove, a welding arm is installed on the outer wall of the driving slide, and two positioning slides are symmetrically slidably installed in the second horizontal groove, a positioning plate is installed on the outer wall of each positioning slide, and an angle adjustment motor is installed on the outer wall of each positioning plate, and the shaft of each angle adjustment motor passes through the positioning plate and is installed with a positioning seat, a positioning groove is opened on the inner wall of each positioning seat, and a fixer is installed in each positioning groove.

[0005] Furthermore, a tilt adjustment motor is fixedly mounted on the outer wall of the skateboard, a driving gear is fixedly mounted on the shaft of the tilt adjustment motor, a driven gear is fixedly sleeved on the tilt adjustment seat, and the driven gear cooperates with the driving gear.

[0006] Furthermore, each of the clamps includes an inner clamping seat rotatably mounted on the adjusting piston rod, each of the inner clamping seat is mounted on an outer clamping seat, each of the inner clamping seat is provided with a plurality of inner pressure chambers, an inner clamping piston rod is sealed and slidably mounted in each of the inner pressure chambers, the ends of the plurality of inner clamping piston rods on the same side away from the inner pressure chamber extend to the outside of the inner clamping seat and are jointly mounted with an outer clamping plate, each of the outer clamping seat is symmetrically provided with a plurality of outer pressure chambers, an outer clamping piston rod is sealed and slidably mounted in each of the outer pressure chambers, the ends of the plurality of outer clamping piston rods on the same side away from the outer pressure chamber extend to the outside of the outer clamping seat and are jointly mounted with an inner clamping plate, an anti-stuck plate is mounted on the inner wall of each of the outer clamping plates, and the upper and lower surfaces of each of the anti-stuck plates are in sliding contact with the bottom wall of the inner clamping plate and the surface of the inner clamping seat respectively.

[0007] Furthermore, each of the inner clamping seats has two oil pressure chambers symmetrically opened on both sides of the multiple internal pressure chambers, each of the internal pressure chambers is connected to the oil pressure chambers on both sides, two clamping control tubes connecting the two oil pressure chambers are symmetrically inserted on the side walls of each of the inner clamping seats, and multiple pressure regulating tubes connecting the multiple internal pressure chambers are inserted on the side walls of each of the inner clamping seats. An isobaric chamber is centrally opened in each of the outer clamping seats, and each of the external pressure chambers is connected to the isobaric chamber. Multiple pressure-conducting tubes are commonly inserted on each of the inner clamping seats and the outer clamping seats, and the two ends of each of the pressure-conducting tubes are respectively connected to the corresponding internal pressure chamber and the isobaric chamber.

[0008] Furthermore, each of the fixers includes a support plate fixed on the bottom wall of the positioning groove, each of the support plates is symmetrically provided with a plurality of pressure-dividing chambers, each of the pressure-dividing chambers is sealed and slidably installed with a support piston rod, and the ends of the plurality of support piston rods on the same side away from the pressure-dividing chamber extend to the outside of the support plate and are jointly installed with a support splint, and a ball is rotatably embedded on the upper surface of each of the support splints.

[0009] Furthermore, each of the support plates is provided with a pressure supply channel in the center, each of the support plates is provided with two symmetrical pressure equalizing chambers, each of the pressure dividing chambers is connected to the pressure equalizing chamber on the corresponding side, both ends of each of the pressure supply channels are respectively connected to the corresponding two pressure equalizing chambers, a pressure supply pipe connected to the pressure supply channel is inserted into the bottom wall of each of the support plates, and one end of each of the pressure supply pipes away from the support plate is inserted into the positioning seat and extends to the outside of the positioning seat.

[0010] The advantages are: by freely adjusting the rotation angle of the horizontal I-shaped steel and the front, rear, left and right inclination angles of the vertical I-shaped steel, more complex contact welding can be performed, increasing the application range of equipment welding, and the horizontal I-shaped steel is automatically fixed in the center through horizontal synchronous clamping, which can quickly and accurately weld according to the set data. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural schematic diagram of a welding device for steel structure manufacturing proposed by the present invention; Figure 2 This is an enlarged view of the structure of the clamping part of a welding device for steel structure manufacturing proposed by the present invention; Figure 3 This is an enlarged view of the structure of the positioning seat part of a welding device for steel structure manufacturing proposed by the present invention; Figure 4 This is an enlarged view of the structure of the inclination adjustment seat of a welding device for steel structure manufacturing proposed by the present invention; Figure 5 This is an enlarged structural view of the fixer portion of a welding device for steel structure manufacturing proposed by the present invention.

[0012] In the figure: 1 body, 11 vertical slot, 12 first horizontal slot, 13 second horizontal slot, 2 guide rod, 21 slide plate, 22 adjustment screw, 23 fixing plate, 24 tilt angle adjustment motor, 25 driving gear, 3 driving slide, 31 welding arm, 4 positioning slide, 41 positioning plate, 42 angle adjustment motor, 43 positioning seat, 44 positioning slot, 5 fixer, 51 support plate, 52 pressure dividing chamber, 53 support piston rod, 54 support clamp, 55 ball, 56 pressure equalization cavity, 57 pressure supply channel, 58 pressure supply pipe, 6 inclination adjustment seat, 61 adjustment cavity, 62 pressure groove, 63 pressure control pipe, 64 adjustment piston rod, 65 driven gear, 7 clamp, 71 inner clamp seat, 72 outer clamp seat, 73 inner pressure cavity, 74 outer pressure cavity, 75 equal pressure cavity, 76 oil pressure cavity, 77 clamp control pipe, 78 pressure regulating pipe, 79 pressure guiding pipe, 8 inner clamp piston rod, 81 outer clamp plate, 82 anti-stuck plate, 9 outer clamp piston rod, 91 inner clamp plate. DETAILED DESCRIPTION

[0013] Reference Figure 1-Figure 5A welding device for steel structure manufacturing includes a body 1, a vertical groove 11, a first horizontal groove 12, and a second horizontal groove 13 are sequentially opened on the side wall of the body 1 from top to bottom, a plurality of guide rods 2 are fixedly installed in the vertical groove 11, a slide plate 21 is slidably installed on the plurality of guide rods 2, an adjusting screw 22 is inserted on the slide plate 21, and the adjusting screw 22 is rotatably installed in the vertical groove 11, a fixing plate 23 is installed on the outer side wall of the slide plate 21, an inclination adjustment seat 6 is rotatably installed on the fixing plate 23, two adjusting chambers 61 are symmetrically opened in the inclination adjustment seat 6, a pressure groove 62 is opened on the inner wall of each adjusting chamber 61, two pressure control tubes 63 respectively connected to the two pressure grooves 62 are symmetrically inserted on the outer side wall of the inclination adjustment seat 6, and each adjusting chamber 61 is provided with a pressure groove 62. An adjusting piston rod 64 is sealed and slidably installed in the cavity 61, and one end of each adjusting piston rod 64 away from the pressure groove 62 extends to the outside of the inclination adjustment seat 6 and is rotatably installed with a clamper 7, a driving slide 3 is slidably installed in the first horizontal groove 12, and a welding arm 31 is installed on the outer wall of the driving slide 3, and two positioning slides 4 are symmetrically slidably installed in the second horizontal groove 13, a positioning plate 41 is installed on the outer wall of each positioning slide 4, and an angle adjustment motor 42 is installed on the outer wall of each positioning plate 41, and the shaft of each angle adjustment motor 42 passes through the positioning plate 41 and is installed with a positioning seat 43, and a positioning groove 44 is opened on the inner wall of each positioning seat 43, and a fixture 5 is installed in each positioning groove 44.

[0014] The adjusting screw 22, driven by an external motor, can rotate and push the slide plate 21 to slide up and down along the guide rod 2 in the vertical groove 11, driving the slide table 3 to move horizontally in a screw-driven manner to improve the accuracy. The positioning slide table 4 is a cylinder slide, which is convenient for quickly centering the I-shaped steel through two positioning seats 43. The welding arm 31 is composed of a multi-degree-of-freedom mechanical arm, a welding needle and a modeling camera system, and can freely adjust the welding angle according to the contact surface of the two I-shaped steels; The clamp 7 can clamp and fix the I-shaped steel vertically, and the inclination adjustment seat 6 can rotate on the fixed plate 23, which can drive the clamp 7 to rotate, and realize the function of changing the left and right inclination angle welding of the I-shaped steel, and the two adjustment chambers 61 can independently control the pressure through the pressure control tube 63, that is, the two adjustment piston rods 64 can independently control the telescopic distance, and the two clamps 7 can independently change their telescopic distances by adjusting the piston rods 64, so as to realize the function of changing the front and rear inclination angle welding of the I-shaped steel, so that the equipment can adapt to contact welding at various angles, and increase the applicable scope of welding; The two positioning seats 43 can clamp the two ends of the I-shaped steel in the positioning groove 44, and the two positioning seats 43 move synchronously, so that the I-shaped steel is automatically centered after clamping, which is convenient for the equipment to automatically adjust the position of the welding arm 31 according to the blanking length of the I-shaped steel, thereby increasing welding efficiency and improving welding accuracy; The angle adjustment motor 42 can drive the positioning seat 43 to rotate, and the positioning seat 43 can drive the horizontally clamped I-shaped steel in the positioning groove 44 to rotate, so that the contact surface between the vertical I-shaped steel and it changes, further increasing the welding application range and enabling complex welding at various angles.

[0015] An inclination adjustment motor 24 is fixedly mounted on the outer wall of the slide plate 21 , a driving gear 25 is fixedly mounted on the shaft of the inclination adjustment motor 24 , a driven gear 65 is fixedly sleeved on the inclination adjustment seat 6 , and the driven gear 65 cooperates with the driving gear 25 .

[0016] The inclination adjustment motor 24 can drive the inclination adjustment seat 6 to rotate a certain angle through the driving gear 25 and the driven gear 65, so that the clamp 7 clamping the I-shaped steel can rotate, so that the vertical I-shaped steel can rotate a certain angle and be welded at a certain angle with the I-shaped steel horizontally clamped by the positioning seat 43.

[0017] Each clamper 7 includes an inner clamping seat 71 rotatably mounted on the adjusting piston rod 64, an outer clamping seat 72 is mounted on each inner clamping seat 71, a plurality of inner pressure chambers 73 are opened in each inner clamping seat 71, an inner clamping piston rod 8 is sealed and slidably mounted in each inner pressure chamber 73, a plurality of inner clamping piston rods 8 on the same side away from the inner pressure chamber 73 are extended to the outer side of the inner clamping seat 71 and are jointly mounted with an outer clamping plate 81, a plurality of outer pressure chambers 74 are symmetrically opened in each outer clamping seat 72, an outer clamping piston rod 9 is sealed and slidably mounted in each outer pressure chamber 74, a plurality of outer clamping piston rods 9 on the same side away from the outer pressure chamber 74 are extended to the outer side of the outer clamping seat 72 and are jointly mounted with an inner clamping plate 91, an anti-stuck plate 82 is mounted on the inner wall of each outer clamping plate 81, and the upper and lower surfaces of each anti-stuck plate 82 are in sliding contact with the bottom wall of the inner clamping plate 91 and the surface of the inner clamping seat 71 respectively; Two oil pressure chambers 76 are symmetrically provided on both sides of the multiple internal pressure chambers 73 in each inner clamping seat 71, and each internal pressure chamber 73 is connected to the oil pressure chambers 76 on both sides. Two clamping control tubes 77 connecting the two oil pressure chambers 76 are symmetrically inserted on the side wall of each inner clamping seat 71, and multiple pressure regulating tubes 78 connecting the multiple internal pressure chambers 73 are inserted on the side wall of each inner clamping seat 71. An isobaric chamber 75 is centrally provided in each outer clamping seat 72, and each external pressure chamber 74 is connected to the isobaric chamber 75. Multiple pressure guiding tubes 79 are commonly inserted on each inner clamping seat 71 and the outer clamping seat 72, and the two ends of each pressure guiding tube 79 are respectively connected to the corresponding inner pressure chamber 73 and the isobaric chamber 75.

[0018] The clamping control tube 77 and the pressure regulating tube 78 are both connected to the external oil pressure system. When the oil pressure chamber 76 is pressurized through the clamping control tube 77, the inner clamping piston rod 8 can be pushed to move toward the inner pressure chamber 73, so that the outer clamping plate 81 moves inward, and the pressure in the inner pressure chamber 73 is input into the isobaric chamber 75 through the pressure guiding tube 79, so that the pressure in the outer pressure chamber 74 increases, so that the outer clamping piston rod 9 moves outward and the inner clamping plate 91 moves outward, that is, the outer clamping plate 81 and the inner clamping plate 91 can approach each other and clamp the groove wall of the I-shaped steel, clamping on both sides inside and outside to increase the firmness of the clamping. The pressure regulating tube 78 can control the pressure in the inner pressure chamber 73 in real time through the oil pressure system to ensure that the outer clamping plate 81 and the inner clamping plate 91 can clamp the groove wall of the I-shaped steel, and can achieve the clamping of I-shaped steels of different widths, thereby increasing the scope of application.

[0019] Each of the fixing devices 5 comprises a support plate 51 fixed on the bottom wall of the positioning groove 44, and a plurality of pressure-dividing cavities 52 are symmetrically opened in each of the support plates 51, and a support piston rod 53 is sealed and slidably installed in each of the pressure-dividing cavities 52, and the ends of the plurality of support piston rods 53 on the same side away from the pressure-dividing cavities 52 extend to the outside of the support plate 51 and are jointly installed with a support clamping plate 54, and a ball 55 is rotatably embedded on the upper surface of each of the support clamping plates 54; A pressure supply channel 57 is centrally provided in each support plate 51, and two equalizing pressure chambers 56 are symmetrically provided in each support plate 51. Each pressure dividing chamber 52 is connected to the equalizing pressure chamber 56 on the corresponding side, and both ends of each pressure supply channel 57 are respectively connected to the corresponding two equalizing pressure chambers 56. A pressure supply pipe 58 connected to the pressure supply channel 57 is inserted on the bottom wall of each support plate 51, and one end of each pressure supply pipe 58 away from the support plate 51 is inserted on the positioning seat 43 and extends to the outside of the positioning seat 43.

[0020] The I-shaped steel horizontally clamped in the two positioning grooves 44 is placed on the supporting clamping plate 54. The ball 55 can reduce the surface friction of the I-shaped steel when the positioning seat 43 is clamped, so that the two ends of the I-shaped steel can smoothly contact the inner wall of the positioning groove 44 to achieve center clamping; The pressure supply pipe 58 is connected to the external oil pressure system. By controlling the pressure in the pressure supply channel 57 through the pressure supply pipe 58, the pressure in the pressure equalizing chamber 56 can be changed, so that the pressure in the pressure dividing chamber 52 changes. When the pressure in the pressure dividing chamber 52 increases, the support piston rod 53 moves outward and pushes the support clamp 54 to move outward, so that it presses against the groove wall of the I-shaped steel and fixes the I-shaped steel in the center, thereby preventing the positioning seat 43 from rotating and causing the I-shaped steel to slide and change its position, thereby avoiding affecting the accuracy of welding.

[0021] Specifically, the pressure control tube 63, the clamping control tube 77, the pressure regulating tube 78 and the pressure supply tube 58 are connected to the external hydraulic system, and the I-shaped steel unloaded by the automatic unloading machine is taken out and placed between the two clamps 7 and between the positioning grooves 44 of the two positioning seats 43, respectively. The two positioning seats 43 slide synchronously in the second horizontal groove 13, so that the two ends of the horizontal I-shaped steel are supported by the groove walls of the positioning grooves 44 of the two positioning seats 43, and the horizontal I-shaped steel is placed on the two fixtures 5; The oil pressure system controls the pressure in the pressure supply channel 57 to increase through the pressure supply pipe 58, so that the pressure in the pressure equalizing chamber 56 increases, and the pressure in the pressure dividing chamber 52 increases, so that the supporting piston rod 53 moves outward and pushes the supporting clamping plate 54 away from the supporting plate 51, so that the supporting clamping plate 54 is pressed against the groove wall of the horizontal I-shaped steel and fixes it in the center; The oil pressure system increases the pressure in the oil pressure chamber 76 through the clamping control tube 77, which pushes the inner clamping piston rod 8 to move toward the inner pressure chamber 73, so that the outer clamping plate 81 moves inward, and the pressure in the inner pressure chamber 73 increases. The pressure in the inner pressure chamber 73 is input into the isobaric chamber 75 through the pressure guide tube 79, so that the pressure in the outer pressure chamber 74 increases, and the outer clamping piston rod 9 moves outward and the inner clamping plate 91 moves outward, that is, the outer clamping plate 81 and the inner clamping plate 91 can be brought close to each other and clamp the groove wall of the I-shaped steel, and the pressure regulating tube 78 can control the pressure in the inner pressure chamber 73 in real time through the oil pressure system, so that the outer clamping plate 81 and the inner clamping plate 91 are both pressed tightly against the groove wall of the vertical I-shaped steel; According to the welding requirements, the control angle adjustment motor 42 drives the positioning seat 43 to rotate, and the inclination adjustment motor 24 rotates the inclination adjustment seat 6 through the driving gear 25 and the driven gear 65, then the inclination adjustment seat 6 drives the vertical I-shaped steel clamped by the clamp 7 to rotate left and right by a corresponding angle through the adjusting piston rod 64, the oil pressure system changes the pressure in the adjustment chamber 61 through the pressure control tube 63, so that the pressures in the two adjustment chambers 61 are different, so that the two clamps 7 can drive the vertical I-shaped steel to move forward and backward by a corresponding angle, the adjusting screw 22 rotates under the drive of the external motor and makes the slide plate 21 move downward, so that the inclination adjustment seat 6 moves downward and drives the vertical I-shaped steel to move downward through the clamp 7 and contact the horizontal I-shaped steel, the welding arm 31 moves to the corresponding position by driving the slide 3 according to the welding requirements and determines the welding area through the built-in modeling camera and starts welding the contact surface.

Claims

1. A welding device for steel structure manufacturing, comprising a body (1), characterized in that: The side wall of the machine body (1) is provided with a vertical groove (11), a first horizontal groove (12) and a second horizontal groove (13) in sequence from top to bottom; a plurality of guide rods (2) are fixedly mounted in the vertical groove (11); a slide plate (21) is slidably mounted on the plurality of guide rods (2); an adjusting screw (22) is inserted into the slide plate (21); the adjusting screw (22) is rotatably mounted in the vertical groove (11); a fixing plate (23) is mounted on the outer side wall of the slide plate (21); an inclination adjustment seat (6) is rotatably mounted on the fixing plate (23); two adjusting chambers (61) are symmetrically provided in the inclination adjustment seat (6); a pressure groove (62) is provided on the inner wall of each adjusting chamber (61); two pressure control tubes (63) respectively connected to the two pressure grooves (62) are symmetrically inserted into the outer side wall of the inclination adjustment seat (6); each adjusting chamber (61) is sealed with a pressure control tube (63) and a pressure control tube (63) is provided in the outer side wall of the inclination adjustment seat (6); and each adjusting chamber (61) is sealed with a pressure control tube (63) and a pressure control tube (63) is provided in the outer side wall of the inclination adjustment seat (6). An adjusting piston rod (64) is slidably mounted on the seal, and one end of each adjusting piston rod (64) away from the pressure groove (62) extends to the outside of the inclination adjustment seat (6) and is rotatably mounted with a clamp (7). A driving slide (3) is slidably mounted in the first horizontal groove (12), and a welding arm (31) is mounted on the outer wall of the driving slide (3). Two positioning slides (4) are symmetrically slidably mounted in the second horizontal groove (13), and a positioning plate (41) is mounted on the outer wall of each positioning slide (4), and an angle adjustment motor (42) is mounted on the outer wall of each positioning plate (41). The shaft of each angle adjustment motor (42) passes through the positioning plate (41) and is mounted with a positioning seat (43). A positioning groove (44) is formed on the inner wall of each positioning seat (43), and a fixer (5) is mounted in each positioning groove (44).

2. A welding device for steel structure manufacturing according to claim 1, characterized in that: An inclination adjustment motor (24) is fixedly mounted on the outer wall of the slide plate (21), a driving gear (25) is fixedly mounted on the shaft of the inclination adjustment motor (24), a driven gear (65) is fixedly sleeved on the inclination adjustment seat (6), and the driven gear (65) cooperates with the driving gear (25).

3. A welding device for steel structure manufacturing according to claim 1, characterized in that: Each of the clamps (7) comprises an inner clamping seat (71) rotatably mounted on the adjusting piston rod (64), an outer clamping seat (72) being mounted on each of the inner clamping seats (71), a plurality of inner pressure chambers (73) being provided in each of the inner clamping seats (71), an inner clamping piston rod (8) being sealed and slidably mounted in each of the inner pressure chambers (73), the ends of the plurality of inner clamping piston rods (8) on the same side away from the inner pressure chamber (73) extending to the outside of the inner clamping seat (71) and being mounted with an outer clamping plate (81) in common, and each of the outer clamping seats (71) being provided with a plurality of inner pressure chambers (73) and a plurality of inner pressure chambers (73) being provided with a plurality of inner pressure chambers (73) and a plurality of inner pressure chambers (73) being provided with an outer clamping plate (81) in common, and each of the outer clamping seats (71) being provided with a plurality of inner pressure chambers (73) and a plurality of inner pressure chambers (73) being provided with an outer clamping plate (81) in common, and each of the inner pressure chambers (73) being provided with an inner pressure chamber ... pressure chamber (73) in common, and each of the inner pressure chambers (73) being provided with an outer pressure chamber (73) and a plurality of inner pressure chambers (73) being provided with an outer pressure chamber (73) in common, and each of the inner pressure chambers (73) being provided with an outer pressure chamber (73) and a plurality of inner pressure chambers (73) being provided with an outer pressure chamber (73) in common, and each of the inner pressure chambers (73) being A plurality of external pressure chambers (74) are symmetrically provided in the seat (72), and an external clamping piston rod (9) is sealed and slidably installed in each of the external pressure chambers (74). The ends of the plurality of external clamping piston rods (9) on the same side away from the external pressure chamber (74) extend to the outside of the external clamping seat (72) and are commonly installed with an internal clamping plate (91). An anti-stuck plate (82) is installed on the inner wall of each of the external clamping plates (81), and the upper and lower surfaces of each of the anti-stuck plates (82) are respectively in sliding contact with the bottom wall of the internal clamping plate (91) and the surface of the internal clamping seat (71).

4. A welding device for steel structure manufacturing according to claim 3, characterized in that: Each of the inner clamping seats (71) has two oil pressure chambers (76) symmetrically arranged on both sides of the multiple inner pressure chambers (73), and each of the inner pressure chambers (73) is connected to the oil pressure chambers (76) on both sides. Two clamping control tubes (77) connected to the two oil pressure chambers (76) are symmetrically inserted on the side wall of each of the inner clamping seats (71). A plurality of pressure regulating tubes (78) connected to the multiple inner pressure chambers (73) are inserted on the side wall of each of the inner clamping seats (71). An isobaric chamber (75) is centrally arranged in each of the outer clamping seats (72), and each of the outer pressure chambers (74) is connected to the isobaric chamber (75). A plurality of pressure guiding tubes (79) are commonly inserted on each of the inner clamping seats (71) and the outer clamping seats (72), and the two ends of each of the pressure guiding tubes (79) are respectively connected to the corresponding inner pressure chamber (73) and the isobaric chamber (75).

5. A welding device for steel structure manufacturing according to claim 1, characterized in that: Each of the fixing devices (5) comprises a support plate (51) fixed on the bottom wall of the positioning groove (44), each of the support plates (51) is symmetrically provided with a plurality of pressure-dividing chambers (52), each of the pressure-dividing chambers (52) is sealed and slidably installed with a support piston rod (53), and the ends of the plurality of support piston rods (53) on the same side away from the pressure-dividing chamber (52) extend to the outside of the support plate (51) and are jointly provided with a support clamping plate (54), and a ball (55) is rotatably embedded on the upper surface of each of the support clamping plates (54).

6. A welding device for steel structure manufacturing according to claim 5, characterized in that: A pressure supply channel (57) is centrally provided in each of the support plates (51), two equalizing pressure chambers (56) are symmetrically provided in each of the support plates (51), each of the pressure dividing chambers (52) is connected to the equalizing pressure chamber (56) on the corresponding side, both ends of each of the pressure supply channels (57) are respectively connected to the corresponding two equalizing pressure chambers (56), a pressure supply pipe (58) connected to the pressure supply channel (57) is inserted into the bottom wall of each of the support plates (51), and one end of each of the pressure supply pipes (58) away from the support plate (51) is inserted into the positioning seat (43) and extends to the outside of the positioning seat (43).

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