An automatic adjustment device for welding gun angle for steel structure welding

Abstract

The present invention discloses an automatic angle adjustment device for welding a welding gun for steel structural parts, comprising a welding gun assembly, a lead screw transmission device, a first electric cylinder, a mounting plate, a rotating device, a second electric cylinder and a mounting seat, wherein the transmission direction of the lead screw transmission device is left and right, and the first electric cylinder is vertically arranged on the lead screw transmission device; the mounting plate is horizontally arranged on the upper end of the push rod of the first electric cylinder; the rotating device is installed on the mounting plate, and the rotating device comprises a rotating shaft, and the axial direction of the rotating shaft is left and right; the second electric cylinder is connected with the rotating device, and the rotating device drives the second electric cylinder to rotate; the mounting seat is connected with the second electric cylinder, and the welding gun assembly is installed on the mounting seat; the present invention can automatically adjust the position, angle and running route of the welding gun angle according to the position and angle of the welding parts required on the large I-beam, so as to realize automatic welding, effectively improve the welding efficiency and reduce the labor intensity of the workers.

Description

Technical Field

[0001] The invention relates to the field of steel component processing devices, in particular to an automatic angle adjustment device for a welding gun used for welding steel structural parts. Background Art

[0002] With the development of society, especially the progress of science and technology, the rapid development of social productivity has been greatly promoted; especially the continuous advancement of automation and industrialization, which has made social development run on the fast lane of the times.

[0003] With the development of society, it is also necessary to build buildings of a certain height in the shortest possible time while ensuring quality; large-scale steel structure buildings came into being.

[0004] In large steel structure buildings, H-shaped steel (I-beam) is a common component. When processing large I-beams, the flange and web of the I-beam are welded first, and then holes are opened and auxiliary plates are welded at the designed position according to the specific structure of the steel structure where the I-beam is located. Or, in order to facilitate the stable installation of the I-beam, diagonal braces, lifting plates and other parts are welded on the web of the I-beam. When welding parts on large I-beams, the angle of the welding gun needs to be adjusted according to the position of the parts, the groove conditions, etc. to meet the welding needs.

[0005] Therefore, it is a problem worth studying to provide an automatic adjustment device for the angle of a welding gun used for welding steel structural parts. Summary of the invention

[0006] In order to solve the deficiencies in the above-mentioned prior art, the present invention provides an automatic angle adjustment device for welding a welding gun for steel structure parts, which can automatically adjust the position, angle and running route of the welding gun according to the position and angle of the required welding parts on the large I-beam, thereby realizing automated welding, effectively improving welding efficiency and reducing the labor intensity of workers.

[0007] The object of the present invention is achieved in that:

[0008] A welding gun angle automatic adjustment device for welding steel structure parts, comprising a welding gun assembly, and further comprising:

[0009] A screw transmission device, wherein the transmission direction of the screw transmission device is left-right;

[0010] A first electric cylinder is vertically arranged on the screw transmission device, and the screw transmission device drives the first electric cylinder to move along the left and right directions;

[0011] A mounting plate, horizontally arranged on the upper end of the first electric cylinder push rod;

[0012] A rotating device is installed on the mounting plate, wherein the rotating device comprises a rotating shaft, and the axial direction of the rotating shaft is the left-right direction;

[0013] The second electric cylinder is connected to the rotating device, and the rotating device drives the second electric cylinder to rotate. When the second electric cylinder is in a horizontal position, its movement direction is a front-back direction;

[0014] A mounting seat is connected to the second electric cylinder, and the welding gun assembly is mounted on the mounting seat.

[0015] The screw transmission device includes two vertical plates, a screw, a polished rod, a first reducer, a first servo motor and a slide seat. The two vertical plates are arranged parallel to each other. The first reducer is installed on the outer side of one vertical plate. The first servo motor is connected to the input end of the first reducer; the screw is rotatably installed between the two vertical plates and is connected to the output end of the first reducer. The polished rod is fixedly installed on the two vertical plates. The polished rod and the screw are both arranged horizontally, and the length direction is along the left and right direction; the slide seat is connected to the polished rod through a polished hole, and is connected to the screw through a threaded hole. The first electric cylinder is vertically installed on the slide seat.

[0016] The rotating device includes a mounting frame, a second servo motor, a second reducer, a rotating shaft and a connecting guide seat. The mounting frame is mounted on the upper end surface of the mounting plate, the second reducer is mounted on the mounting frame, the second servo motor is mounted on the second reducer, and the second servo motor is connected to the input end of the second reducer, the rotating shaft is connected to the output end of the second reducer, the connecting guide seat is connected to the rotating shaft and rotates synchronously with the rotating shaft, and the second electric cylinder is mounted on the connecting guide seat.

[0017] The rotating shaft includes a cylindrical portion and a rectangular block portion, the cylindrical portion is connected to the second reducer, the connecting guide seat is provided with a rectangular hole adapted to the rectangular block portion of the rotating shaft, and the connecting guide seat is sleeved on the rectangular block portion of the rotating shaft through its rectangular hole; the connecting guide seat is provided with a connecting through hole leading to its rectangular hole, the rectangular block portion of the rotating shaft is provided with a threaded hole, the connecting guide seat is fixedly connected to the rotating shaft by a bolt, and the rod of the bolt passes through the connecting through hole of the connecting guide seat and is screwed into the threaded hole provided on the rectangular block portion of the rotating shaft.

[0018] The connecting guide seat includes a square tube portion, the second electric cylinder is installed in the square tube portion, the length direction of the square tube portion is the same as the movement direction of the second electric cylinder, and a rectangular through groove is provided on the upper end wall of the square tube portion; the mounting seat includes a connecting portion and a flat plate portion fixedly connected to the connecting portion, the connecting portion is connected to the push rod of the second electric cylinder, the connecting portion passes through the rectangular through groove, the flat plate portion is located on the upper side of the square tube portion, and the welding gun assembly is installed on the flat plate portion of the mounting seat.

[0019] A fixing block is arranged on the side wall of the square tube portion, a guide cylindrical hole is arranged in the fixing block, a threaded through hole leading to the guide cylindrical hole is arranged on the fixing block, and a fixing bolt is installed in the threaded through hole; a round rod is inserted into the guide cylindrical hole, the diameter of the round rod is the same as the aperture of the guide cylindrical hole, the length direction of the round rod is the same as the length direction of the square tube portion, a length scale is arranged on the cylindrical wall of the round rod along its length direction, and a measuring plate is vertically arranged at one end of the round rod.

[0020] A through groove is arranged on the cylindrical wall of the round rod along its length direction, and a scale is arranged in the through groove. The length direction of the scale is along the length direction of the round rod, and the length scale is arranged on the scale.

[0021] There are three through grooves, and the three through grooves are evenly arranged along the circumferential direction of the round rod, and a scale is arranged on the bottom wall of each through groove.

[0022] In addition, it includes a third electric cylinder, which is horizontally arranged on the upper end surface of the mounting plate, and its movement direction is the front and rear direction. A first button switch is arranged at the front end of the push rod of the third electric cylinder, and the first button switch is electrically connected to the third electric cylinder.

[0023] A cylinder is provided at the front end of the push rod of the third electric cylinder, and the length direction of the cylinder is the same as the movement direction of the third electric cylinder. The first button switch is provided in the cylinder and is located at the end of the cylinder close to the push rod of the third electric cylinder. A through hole for the power cord of the first button switch to pass through is provided on the cylinder wall of the cylinder, and an end cover is provided at the end of the cylinder away from the push rod of the third electric cylinder, and a guide through hole is provided on the end cover; a spring and a T-block are provided in the cylinder, and the spring is located between the push rod and the T-block of the third electric cylinder. The transverse part of the T-block is cylindrical, and its diameter is the same as the aperture of the cylinder. The vertical part of the T-block passes through the guide through hole provided on the end cover, and the top of the vertical part of the T-block is equipped with a second button switch, and the second button switch is electrically connected to the third electric cylinder.

[0024] Positive and beneficial effects: 1. The present invention can automatically adjust the position, angle and running route of the welding gun angle according to the position and angle of the required welding parts on the large I-beam, realize automatic welding, effectively improve welding efficiency and reduce the labor intensity of workers; 2. The present invention is provided with a structure for positioning the welding gun assembly, and the welding gun assembly is positioned and installed so that the distance between the welding gun head and the second electric cylinder push rod in the running direction of the second electric cylinder is always the same after each installation of the welding gun assembly. In this way, it is more accurate and convenient to adjust the position and angle of the welding gun assembly through the industrial computer; 3. The present invention is provided with a third electric cylinder and a first button switch, which can automatically calculate the distance between the welding gun head of the welding gun assembly and the I-beam, and then combined with the data of the position of the parts on the I-beam input into the industrial computer, it can calculate how each private service motor and each electric cylinder should operate to complete the automatic welding. In this way, it is more convenient to automatically adjust the position, angle and running route of the welding gun assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of embodiment 1 of the present invention;

[0026] Figure 2 This is a front view of Embodiment 1 of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of Example 1 of the present invention when the lead screw transmission device and the first electric cylinder are removed;

[0028] Figure 4 It is a structural schematic diagram of the screw transmission device of the present invention;

[0029] Figure 5 It is a three-dimensional schematic diagram of embodiment 2 of the present invention;

[0030] Figure 6 This is a front view of Embodiment 2 of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of Example 2 of the present invention when the lead screw transmission device and the first electric cylinder are removed from the front view;

[0032] Figure 8 This is a schematic diagram of the structure of Embodiment 2 of the present invention when the lead screw transmission device and the first electric cylinder are removed from the rear view perspective;

[0033] Fig. 9 This is a schematic diagram of the installation structure of the round rod according to Embodiment 2 of the present invention;

[0034] Fig.10 This is a schematic diagram of the internal structure of the cylinder of Example 2 of the present invention.

[0035] The figure shows: welding gun assembly 1, screw transmission device 2, vertical plate 201, screw 202, polished rod 203, first reducer 204, first servo motor 205, slide seat 206, first electric cylinder 3, mounting plate 4, rotating device 5, mounting frame 501, second servo motor 502, second reducer 503, connecting guide seat 504, square tube portion 505, rectangular through groove 506, second electric cylinder 6, mounting seat 7, third electric cylinder 8, first push button switch 9, cylinder 10, end cover 11, spring 12, T-shaped block 13, second push button switch 14, fixing block 15, round rod 16, scale 17, fixing bolt 18, measuring plate 19. DETAILED DESCRIPTION

[0036] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0037] Example 1

[0038] An automatic adjustment device for welding gun angle for steel structure welding, please refer to Figure 1 , Figure 2 and Figure 3 , including a welding gun assembly 1, a screw transmission device 2, a first electric cylinder 3, a mounting plate 4, a rotating device 5, a second electric cylinder 6 and a mounting seat 7.

[0039] See also Figure 4 The screw transmission device 2 includes two vertical plates 201, a screw rod 202, a light rod 203, a first reducer 204, a first servo motor 205 and a slide seat 206. The two vertical plates 201 are arranged parallel to each other and vertically. The first reducer 204 is installed on the outer surface of a vertical plate 201, and the first servo motor 205 is connected to the input end of the first reducer 204. The screw rod 202 is rotatably installed between the two vertical plates 201 and is connected to the output end of the first reducer 204. The light rod 203 is fixedly installed on the two vertical plates 201, and the light rod 203 and the screw rod 202 are both arranged horizontally, and the length direction is along the left and right direction. The slide seat 206 is connected to the light rod 203 through a light hole, and is connected to the screw rod 202 through a threaded hole. The first electric cylinder 3 is vertically installed on the slide seat 206. The first servo motor 205 is started, and the first servo motor 205 drives the polished rod 203 to rotate through the first reducer 204, thereby driving the slide seat 206 to move along the left and right direction.

[0040] See also Figure 1 , Figure 2 and Figure 3, the first electric cylinder 3 is vertically arranged on the screw transmission device 2, and the screw transmission device 2 can drive the first electric cylinder 3 to move along the left and right direction. The mounting plate 4 is horizontally arranged on the upper end of the push rod of the first electric cylinder 3. The rotating device 5 includes a mounting frame 501, a second servo motor 502, a second reducer 503, a rotating shaft and a connecting guide seat 504. The mounting frame 501 is installed on the upper end surface of the mounting plate 4, the second reducer 503 is installed on the mounting frame 501, the second servo motor 502 is installed on the second reducer 503, and the second servo motor 502 is connected to the input end of the second reducer 503, and the rotating shaft is connected to the output end of the second reducer 503. The axial direction of the rotating shaft of the rotating device 5 is along the left and right direction. The rotating shaft includes a cylindrical portion and a rectangular block portion, the cylindrical portion is connected to the second reducer 503, a rectangular hole matching the rectangular block portion of the rotating shaft is provided on the connecting guide seat 504, and the connecting guide seat 504 is sleeved on the rectangular block portion of the rotating shaft through its rectangular hole, so that the connecting guide seat 504 can rotate synchronously with the rotating shaft. The connecting guide seat 504 is provided with a connecting through hole leading to its rectangular hole, and the rectangular block portion of the rotating shaft is provided with a threaded hole. The connecting guide seat 504 is fixedly connected to the rotating shaft by a bolt, and the rod of the bolt passes through the connecting through hole of the connecting guide seat 504 and is screwed into the threaded hole provided on the rectangular block portion of the rotating shaft. The second servo motor 502 drives the rotating shaft and the connecting guide seat 504 to rotate through the second reducer 503. The connecting guide seat 504 includes a square tube portion 505, and when the connecting guide seat 504 is actively moved to a horizontal position of its square tube portion 505, the length direction of the square tube portion 505 is along the front-back direction. A rectangular through slot 506 is provided on the upper end wall of the square tube 505, and the length direction of the rectangular through slot 506 is along the length direction of the square tube 505. The second electric cylinder 6 is installed in the square tube 505, and its movement direction is the same as the length direction of the square tube 505. The mounting seat 7 includes a connecting portion and a flat plate portion fixedly connected to the connecting portion, the connecting portion is connected to the push rod of the second electric cylinder 6, the connecting portion passes through the rectangular through slot 506, the flat plate portion is located on the upper side of the square tube 505, and the welding gun assembly 1 is installed on the flat plate portion of the mounting seat 7.

[0041] Working principle of this embodiment: When welding parts on a large I-beam, the I-beam is placed in the left-right direction. Neither the I-beam nor the parts need to be moved. The parts are first spot welded to the I-beam, or a clamping support structure is used to support and clamp the parts on the I-beam. The lead screw transmission device 2 can drive the welding gun assembly 1 to move in the left-right direction, the first electric cylinder 3 can drive the welding gun assembly 1 to move in the up-down direction, and the second electric cylinder 6 can drive the welding gun assembly 1 to move straight forward, straight backward, obliquely forward, and obliquely backward. The rotating device 5 can drive the welding gun assembly 1 to rotate to adjust the angle of the welding gun. When performing automated welding, the first servo motor 205 of the screw transmission device 2, the second servo motor 502 of the rotating device 5, the first electric cylinder 3 and the second electric cylinder 6 are all connected to the industrial computer. The data such as the welding size, welding route, welding angle of each connection of the I-beam and parts are input into the industrial computer. The welding gun assembly 1 can be controlled by the industrial computer to automatically adjust the position, angle and running route to realize automated welding, which can effectively improve welding efficiency and reduce the labor intensity of workers.

[0042] Example 2

[0043] An automatic adjustment device for welding gun angle for steel structure welding, please refer to Figure 5 , Figure 6 , Figure 7 and Figure 8 , including a welding gun assembly 1, a screw transmission device 2, a first electric cylinder 3, a mounting plate 4, a rotating device 5, a second electric cylinder 6 and a mounting seat 7.

[0044] See also Figure 4 The screw transmission device 2 includes two vertical plates 201, a screw rod 202, a light rod 203, a first reducer 204, a first servo motor 205 and a slide seat 206. The two vertical plates 201 are arranged parallel to each other and vertically. The first reducer 204 is installed on the outer surface of a vertical plate 201, and the first servo motor 205 is connected to the input end of the first reducer 204. The screw rod 202 is rotatably installed between the two vertical plates 201 and is connected to the output end of the first reducer 204. The light rod 203 is fixedly installed on the two vertical plates 201, and the light rod 203 and the screw rod 202 are both arranged horizontally, and the length direction is along the left and right direction. The slide seat 206 is connected to the light rod 203 through a light hole, and is connected to the screw rod 202 through a threaded hole. The first electric cylinder 3 is vertically installed on the slide seat 206. The first servo motor 205 is started, and the first servo motor 205 drives the polished rod 203 to rotate through the first reducer 204, thereby driving the slide seat 206 to move along the left and right direction.

[0045] See also Figure 5 , Figure 6 , Figure 7 and Figure 8, the first electric cylinder 3 is vertically arranged on the screw transmission device 2, and the screw transmission device 2 can drive the first electric cylinder 3 to move along the left and right direction. The mounting plate 4 is horizontally arranged on the upper end of the push rod of the first electric cylinder 3. The rotating device 5 includes a mounting frame 501, a second servo motor 502, a second reducer 503, a rotating shaft and a connecting guide seat 504. The mounting frame 501 is installed on the upper end surface of the mounting plate 4, the second reducer 503 is installed on the mounting frame 501, the second servo motor 502 is installed on the second reducer 503, and the second servo motor 502 is connected to the input end of the second reducer 503, and the rotating shaft is connected to the output end of the second reducer 503. The axial direction of the rotating shaft of the rotating device 5 is along the left and right direction. The rotating shaft includes a cylindrical portion and a rectangular block portion, the cylindrical portion is connected to the second reducer 503, a rectangular hole matching the rectangular block portion of the rotating shaft is provided on the connecting guide seat 504, and the connecting guide seat 504 is sleeved on the rectangular block portion of the rotating shaft through its rectangular hole, so that the connecting guide seat 504 can rotate synchronously with the rotating shaft. The connecting guide seat 504 is provided with a connecting through hole leading to its rectangular hole, and the rectangular block portion of the rotating shaft is provided with a threaded hole. The connecting guide seat 504 is fixedly connected to the rotating shaft by a bolt, and the rod of the bolt passes through the connecting through hole of the connecting guide seat 504 and is screwed into the threaded hole provided on the rectangular block portion of the rotating shaft. The second servo motor 502 drives the rotating shaft and the connecting guide seat 504 to rotate through the second reducer 503. The connecting guide seat 504 includes a square tube portion 505, and when the connecting guide seat 504 is actively moved to a horizontal position of its square tube portion 505, the length direction of the square tube portion 505 is along the front-back direction. A rectangular through slot 506 is provided on the upper end wall of the square tube 505, and the length direction of the rectangular through slot 506 is along the length direction of the square tube 505. The second electric cylinder 6 is installed in the square tube 505, and its movement direction is the same as the length direction of the square tube 505. The mounting seat 7 includes a connecting portion and a flat plate portion fixedly connected to the connecting portion, the connecting portion is connected to the push rod of the second electric cylinder 6, the connecting portion passes through the rectangular through slot 506, the flat plate portion is located on the upper side of the square tube 505, and the welding gun assembly 1 is installed on the flat plate portion of the mounting seat 7.

[0046] See also Figure 7 and Fig. 9A fixing block 15 is arranged on the side wall of the square tube 505. The fixing block 15 is a rectangular block. A guide cylindrical hole is arranged in the fixing block 15. A threaded through hole leading to the guide cylindrical hole is arranged on the fixing block 15, and a fixing bolt 18 is installed in the threaded through hole. A round rod 16 is inserted into the guide cylindrical hole. The diameter of the round rod 16 is the same as the aperture of the guide cylindrical hole. The length direction of the round rod 16 is the same as the length direction of the square tube 505. Three through grooves are evenly arranged on the cylindrical wall of the round rod 16 along its circumferential direction. The length direction of the through grooves is along the length direction of the round rod 16. A scale 17 is arranged on the bottom of each through groove. The length direction of the scale 17 is the same as the length direction of the round rod 16. The scale 17 is provided with a length scale along its length direction. Since three scales 17 are arranged, the scale value on the scale 17 at the end of the fixing block 15 can be viewed more conveniently. A measuring plate 19 is provided at one end of the round rod 16, and the round rod 16 is perpendicular to the measuring plate 19. By loosening the fixing bolt 18, the round rod 16 can be rotated and moved along its length direction, and the round rod 16 drives the measuring plate 19 to move. When the welding gun assembly 1 is installed on the flat plate portion of the mounting seat 7, positioning is performed through the measuring plate 19 so that the welding gun head on which the welding gun assembly 1 is installed reaches a fixed position relative to the push rod of the second electric cylinder 6. In this way, it is more accurate and convenient to adjust the position and angle of the welding gun assembly 1 through the industrial computer. After the welding gun assembly 1 is positioned, the measuring plate 19 is retracted and the fixing bolt 18 is tightened to fix the round rod 16 and the measuring plate 19 so that they do not affect welding.

[0047] See also Figure 5 , Figure 6 , 7 and Fig.10, a third electric cylinder 8 is also horizontally mounted on the upper end surface of the mounting plate 4, and the movement direction of the third electric cylinder 8 is along the front-back direction. A cylinder 10 is provided at the front end of the push rod of the third electric cylinder 8, and the length direction of the cylinder 10 is the same as the movement direction of the third electric cylinder 8. A first button switch 9 is provided in the cylinder 10, and the first button switch 9 is located at one end of the cylinder 10 close to the push rod of the third electric cylinder 8. A through hole for the power line of the first button switch 9 to pass through is provided on the cylinder wall of the cylinder 10. An end cover 11 is provided at one end of the cylinder 10 away from the push rod of the third electric cylinder 8, and a guide through hole is provided on the end cover 11. A spring 12 and a T-shaped block 13 are provided in the cylinder 10, and the spring 12 is located between the push rod of the third electric cylinder 8 and the T-shaped block 13. The transverse part of the T-shaped block 13 is cylindrical, and its diameter is the same as the aperture of the cylinder 10. The vertical part of the T-shaped block 13 passes through the guide through hole provided on the end cover 11, and the top of the vertical part of the T-shaped block 13 is installed with a second button switch 14. The first button switch 9 and the second button switch 14 are both electrically connected to the third electric cylinder 8 through the industrial computer. Under the action of the spring 12, the T-block 13 is pressed against the end cover 11. When the vertical distance between the I-beam and the present invention is determined, the third electric cylinder 8 is started, and the third electric cylinder 8 drives the cylinder 10 to move toward the I-beam. The second button switch 14 is pressed after encountering the I-beam. When the second button switch 14 is pressed until it is triggered, the second button switch 14 transmits a signal to the industrial computer, and the industrial computer controls the third electric cylinder 8 to decelerate. As the third electric cylinder 8 continues to run, the T-block 13 is pressed in the direction of the first button switch 9. When the lateral part of the T-block 13 presses the first button switch 9 until the first button switch 9 is triggered, the first button switch 9 transmits a signal to the industrial computer, and the industrial computer controls the third electric cylinder 8 to stop running. In this way, the cylinder 10 can be moved quickly, and the third electric cylinder 8 can be stably stopped to prevent the first button switch 9 from being crushed. According to the running distance of the third electric cylinder 8 and the triggering distance of the first button switch 9, combined with the position of the welding gun head of the welding gun assembly 1, the distance between the welding gun head of the welding gun assembly 1 and the I-beam can be calculated, and then combined with the data of the position of the parts on the I-beam input into the industrial computer, it can be calculated how each private service motor and each electric cylinder should operate to complete the automatic welding. In this way, it is more convenient to automatically adjust the position, angle and running route of the welding gun assembly 1.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A welding gun angle automatic adjustment device for welding steel structure parts, comprising a welding gun assembly (1), characterized in that: Also includes: A screw transmission device (2), wherein the transmission direction of the screw transmission device (2) is a left-right direction; A first electric cylinder (3) is vertically arranged on the screw transmission device (2), and the screw transmission device (2) drives the first electric cylinder (3) to move in a left-right direction; A mounting plate (4) is horizontally arranged on the upper end of the push rod of the first electric cylinder (3); A rotating device (5) is mounted on the mounting plate (4), wherein the rotating device (5) comprises a rotating shaft, and the axial direction of the rotating shaft is a left-right direction; The second electric cylinder (6) is connected to the rotating device (5), and the rotating device (5) drives the second electric cylinder (6) to rotate. When the second electric cylinder (6) is in a horizontal position, its movement direction is a front-rear direction; A mounting seat (7), the mounting seat (7) being connected to the second electric cylinder (6), and the welding gun assembly (1) being mounted on the mounting seat (7); The rotating device (5) comprises a mounting frame (501), a second servo motor (502), a second reducer (503), a rotating shaft and a connecting guide seat (504); the mounting frame (501) is mounted on the upper end surface of the mounting plate (4); the second reducer (503) is mounted on the mounting frame (501); the second servo motor (502) is mounted on the second reducer (503); the second servo motor (502) is connected to an input end of the second reducer (503); the rotating shaft is connected to an output end of the second reducer (503); the connecting guide seat (504) is connected to the rotating shaft and rotates synchronously with the rotating shaft; and the second electric cylinder (6) is mounted on the connecting guide seat (504); The rotating shaft comprises a cylindrical portion and a rectangular block portion, the cylindrical portion is connected to the second reducer (503), the connecting guide seat (504) is provided with a rectangular hole adapted to the rectangular block portion of the rotating shaft, the connecting guide seat (504) is sleeved on the rectangular block portion of the rotating shaft through its rectangular hole; the connecting guide seat (504) is provided with a connecting through hole leading to its rectangular hole, the rectangular block portion of the rotating shaft is provided with a threaded hole, the connecting guide seat (504) is fixedly connected to the rotating shaft by a bolt, the rod of the bolt passes through the connecting through hole of the connecting guide seat (504) and is screwed into the threaded hole provided on the rectangular block portion of the rotating shaft; The connecting guide seat (504) comprises a square tube portion (505), the second electric cylinder (6) is installed in the square tube portion (505), the length direction of the square tube portion (505) is the same as the movement direction of the second electric cylinder (6), and a rectangular through groove (506) is provided on the upper end wall of the square tube portion (505); the mounting seat (7) comprises a connecting portion and a flat plate portion fixedly connected to the connecting portion, the connecting portion is connected to the push rod of the second electric cylinder (6), the connecting portion passes through the rectangular through groove (506), the flat plate portion is located on the upper side of the square tube portion (505), and the welding gun assembly (1) is installed on the flat plate portion of the mounting seat (7); A fixing block (15) is arranged on the side wall of the square tube portion (505), a guide cylindrical hole is arranged in the fixing block (15), a threaded through hole leading to the guide cylindrical hole is arranged on the fixing block (15), and a fixing bolt (18) is installed in the threaded through hole; a round rod (16) is inserted into the guide cylindrical hole, the diameter of the round rod (16) is the same as the hole diameter of the guide cylindrical hole, the length direction of the round rod (16) is the same as the length direction of the square tube portion (505), a length scale is arranged on the cylindrical wall of the round rod (16) along its length direction, and a measuring plate (19) is vertically arranged at one end of the round rod (16); The invention also comprises a third electric cylinder (8), wherein the third electric cylinder (8) is horizontally arranged on the upper end surface of the mounting plate (4), and its movement direction is the front-to-back direction; a first button switch (9) is arranged at the front end of the push rod of the third electric cylinder (8), and the first button switch (9) is electrically connected to the third electric cylinder (8); a cylinder (10) is arranged at the front end of the push rod of the third electric cylinder (8), and the length direction of the cylinder (10) is the same as the movement direction of the third electric cylinder (8); the first button switch (9) is arranged in the cylinder (10) and is located at one end of the cylinder (10) close to the push rod of the third electric cylinder (8); a power line for the first button switch (9) is arranged on the cylinder wall of the cylinder (10). The cylinder (10) is provided with an end cover (11) at one end away from the push rod of the third electric cylinder (8), and the end cover (11) is provided with a guide through hole; a spring (12) and a T-shaped block (13) are provided in the cylinder (10), and the spring (12) is located between the push rod of the third electric cylinder (8) and the T-shaped block (13); the transverse portion of the T-shaped block (13) is cylindrical, and its diameter is the same as the aperture of the cylinder (10); the vertical portion of the T-shaped block (13) passes through the guide through hole provided on the end cover (11); a second button switch (14) is installed at the top end of the vertical portion of the T-shaped block (13), and the second button switch (14) is electrically connected to the third electric cylinder (8).

2. The automatic welding gun angle adjustment device for steel structure welding according to claim 1 is characterized in that: The screw transmission device (2) comprises two vertical plates (201), a screw rod (202), a polished rod (203), a first reducer (204), a first servo motor (205) and a slide seat (206); the two vertical plates (201) are arranged parallel to each other; the first reducer (204) is installed on the outer side of one vertical plate (201); the first servo motor (205) is connected to the input end of the first reducer (204); the screw rod (202) The slide seat (206) is rotatably mounted between the two vertical plates (201) and connected to the output end of the first reducer (204); the light rod (203) is fixedly mounted on the two vertical plates (201); the light rod (203) and the lead screw (202) are both arranged horizontally, and their length directions are along the left-right direction; the slide seat (206) is connected to the light rod (203) through a light hole, and is connected to the lead screw (202) through a threaded hole; and the first electric cylinder (3) is vertically mounted on the slide seat (206).

3. The automatic welding gun angle adjustment device for steel structure welding according to claim 1 is characterized in that: A through groove is provided on the cylindrical wall of the round rod (16) along its length direction, and a scale (17) is provided in the through groove. The length direction of the scale (17) is along the length direction of the round rod (16), and the length scale is provided on the scale (17).

4. The automatic welding gun angle adjustment device for steel structure welding according to claim 3 is characterized in that: There are three through grooves, and the three through grooves are evenly arranged along the circumferential direction of the round rod (16), and a scale (17) is arranged on the bottom wall of each through groove.

Images