An intelligent welding device and system for sign production

Abstract

The present invention discloses an intelligent welding device and system for producing signboards, including a box body, wherein a first hydraulic cylinder and a second hydraulic cylinder are fixedly installed on the inner top and inner bottom of the box body, a first abutment plate is fixedly installed on the telescopic ends of the two first hydraulic cylinders, and a second abutment plate is fixedly installed on the telescopic ends of the two second hydraulic cylinders, a mounting groove is provided on the top of the box body, and a "U"-shaped frame is fixedly installed on the top of the box body. The present invention can not only automatically adjust the distance between the welding gun and the arc-shaped part in real time during the welding process, thereby meeting the requirements of the arc welding seam, but also weld the arc weld seam twice to ensure the welding quality, and can also meet the welding requirements of arc-shaped parts of different lengths through adjustment, and during the welding process, argon gas can be blown to the weld seam to protect the weld seam, further ensuring the quality of the weld seam, and is easy to use.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and in particular to an intelligent welding device and system for producing signboards. Background Art

[0002] Laser welding involves irradiating a laser beam onto the workpiece surface, causing the workpiece surface to heat up rapidly and melt, thereby forming a weld. Its working principle involves the excitation of a laser-activated medium, causing it to oscillate back and forth in a resonant cavity, forming a stimulated radiation beam. When the beam contacts the workpiece, its energy is absorbed by the workpiece, and the temperature reaches the melting point of the material, allowing welding to occur.

[0003] When welding some signs, it is necessary to weld arc-shaped parts and straight parts with a certain curvature. Since the weld is arc-shaped, it is difficult for the existing welding device to always align the muzzle of the laser welding gun with the weld. At the same time, during the welding process, due to the high temperature at the weld, the weld is easy to react with oxygen at high temperature, resulting in oxidation of the weld, affecting the welding quality. For this reason, we proposed an intelligent welding device and system for sign production. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an intelligent welding device and system for sign production.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An intelligent welding device for producing signboards comprises a box body, wherein a first hydraulic cylinder and a second hydraulic cylinder are fixedly installed on the inner top and inner bottom of the box body, a first abutment plate is fixedly installed on the telescopic ends of the two first hydraulic cylinders, and a second abutment plate is fixedly installed on the telescopic ends of the two second hydraulic cylinders, a mounting groove is opened on the top of the box body, a "U"-shaped frame is fixedly installed on the top of the box body, an air storage box is arranged on the top of the "U"-shaped frame, an adjustment component is arranged on the "U"-shaped frame, an intelligent welding component connected to the adjustment component is arranged in the box body, and a symmetrically arranged protection component is arranged on the "U"-shaped frame.

[0007] Preferably, the adjustment assembly includes a reciprocating motor fixedly mounted on the top of the "U"-shaped frame, a rotating shaft is fixedly connected to the output shaft of the reciprocating motor, an adjusting rod is fixedly mounted on the bottom of the rotating shaft, an adjusting groove is opened at the bottom of the adjusting rod, a threaded rod is rotatably connected between the inner walls at both ends of the adjusting groove, an adjustment block is threadedly sleeved on the outer wall of the threaded rod, the adjustment block is slidably connected to the inner walls on both sides of the adjusting groove, one end of the threaded rod passes through the inner wall of one end of the adjusting groove and extends out, one end of the threaded rod is fixedly mounted with an adjustment knob located outside the adjusting groove, a reciprocating rod is arranged below the adjusting rod, a groove is opened at the top of the reciprocating rod, an inner rod is fixedly mounted on the bottom of the adjusting block, one end of the inner rod is located in the groove and is slidably connected to the inner wall of the groove.

[0008] Preferably, the intelligent welding assembly includes a moving rod that is penetrated in the mounting groove and close to the inner walls on both sides of the mounting groove, one end of the moving rod located above the mounting groove is fixedly connected to the bottom of the reciprocating rod, an "L"-shaped block is fixedly installed on one side wall of the moving rod, a guide rod is fixedly connected between the "L"-shaped block and the moving rod, a mounting block is slidably sleeved on the guide rod, a spring is fixedly connected between the mounting block and the "L"-shaped block, a circular hole located below the guide rod is opened on the moving rod, a rotating tube rotatably connected to the mounting block is penetrated on the mounting block, the rotating tube penetrates the circular hole, and a stop block is fixedly installed on the end of the rotating tube away from the "L"-shaped block, the "L A reversing motor is fixedly mounted on the outer wall of the "L"-shaped block, the output shaft of the reversing motor passes through the "L"-shaped block and is rotatably connected to the "L"-shaped block, a reversing rod is fixedly mounted on the output shaft of the reversing motor, the reversing rod is adapted to the rotating tube and one end of the reversing rod is located in the rotating tube, a laser welding gun located below the rotating tube is penetrated by the mounting block, an air blowing pipe located below the laser welding gun is fixedly mounted on one side wall of the mounting block close to the abutment block, a first contact switch is arranged on one side wall of the mounting block, a second contact switch is arranged on one side wall of the moving rod close to the first contact switch, and both the first contact switch and the second contact switch are located in the circuit of the reversing motor.

[0009] Preferably, the protection assembly includes a protection box fixedly mounted on the outer wall of the "U"-shaped frame, a connecting rod slidably connected to the outer wall of the "U"-shaped frame is penetrated by, one end of the connecting rod is fixedly connected to the reciprocating rod, and the other end of the connecting rod is fixedly connected to a piston block slidably connected to the inner wall of the protection box, the protection box is provided with a first protection tube and a second protection tube connected to the interior thereof, the end of the first protection tube away from the protection box is connected to the blowing pipe, and the end of the second protection tube away from the protection box is connected to the air storage box.

[0010] Preferably, a pointer is provided on the outer side wall of the inner rod, and a scale line is provided on the top of the reciprocating rod.

[0011] Preferably, the stop block is semicircular, the reversing rod is a square rod, and the axis of the laser welding gun, the axis of the air blowing pipe and the axis of the rotating tube are located on the same vertical plane.

[0012] Preferably, the ends of the first protection tube and the second protection tube connected to the protection box are both located on the side of the piston block away from the reciprocating rod, and one-way valves are provided in the first protection tube and the second protection tube.

[0013] Preferably, an intelligent welding system for signboard production comprises the intelligent welding device as described in any one of the above.

[0014] Beneficial effects of the present invention:

[0015] By setting the adjustment component and the intelligent welding component, the welding gun can be reciprocated during the reciprocating movement of the reciprocating rod, so that the weld can be welded twice, thereby improving the welding quality.

[0016] By setting up an intelligent welding component, during the welding process, the distance between the welding gun and the arc-shaped part can be adjusted in real time by making the stop block contact with the inner wall of the arc-shaped part, so that the muzzle of the welding gun is always aligned with the weld, meeting the welding requirements of the arc weld.

[0017] By setting up the adjustment component, the linear distance between the axis of the inner rod and the axis of the rotating shaft 16 can be changed by turning the adjustment knob, thereby changing the distance of the left and right movement of the welding gun, meeting the welding requirements of arc parts of different lengths and having a wider range of uses.

[0018] By setting up a protective component, argon gas can be automatically blown out at the weld during the welding process, thereby effectively isolating the oxygen in the air and preventing the weld from reacting with oxygen at high temperatures, thereby avoiding oxidation of the weld and further ensuring the quality of the weld.

[0019] The present invention can not only automatically adjust the distance between the welding gun and the arc part in real time during the welding process, thus meeting the requirements of arc welding seams, but also perform two weldings on the arc welds to ensure the welding quality. Moreover, the present invention can also be adjusted to meet the welding requirements of arc parts of different lengths. During the welding process, argon gas can be blown into the weld to protect the weld, thus further ensuring the quality of the weld and being easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of an intelligent welding device for signboard production proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of an intelligent welding device for signboard production proposed by the present invention when viewed from above;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the adjustment assembly and the intelligent welding assembly of the present invention;

[0023] Figure 4 A schematic diagram of a three-dimensional structure of an adjustment component and an intelligent welding component of the present invention with half of the components cut away;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure inside the protection box of the present invention;

[0025] Figure 6 It is a schematic diagram of the planar structure of the vertical surface orientation of the stop block of the present invention when it is in different areas of the arc-shaped member.

[0026] In the figure: 1 box, 2 first hydraulic cylinder, 3 first abutment plate, 4 second hydraulic cylinder, 5 second abutment plate, 6 moving rod, 7 "L" block, 8 reversing motor, 9 laser welding gun, 10 first protection tube, 11 protection box, 12 second protection tube, 13 "U" frame, 14 air storage box, 15 reciprocating motor, 16 rotating shaft, 17 adjustment rod, 18 inner rod, 19 reciprocating rod, 20 mounting groove, 21 rotating tube, 22 adjustment knob, 23 pointer, 24 scale line, 25 connecting rod, 26 guide rod, 27 spring, 28 abutment block, 29 reversing rod, 30 first contact switch, 31 second contact switch, 32 air blowing pipe, 33 mounting block, 34 groove, 35 threaded rod, 36 adjustment block, 37 adjustment groove, 38 piston block, 39 round hole. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Reference Figure 1-Figure 6, an intelligent welding device for label production, comprising a box body 1, a first hydraulic cylinder 2 and a second hydraulic cylinder 4 are fixedly installed on the inner top and the inner bottom of the box body 1, a first abutment plate 3 is fixedly installed on the telescopic ends of the two first hydraulic cylinders 2, and a second abutment plate 5 is fixedly installed on the telescopic ends of the two second hydraulic cylinders 4, a mounting groove 20 is opened on the top of the box body 1, a "U"-shaped frame 13 is fixedly installed on the top of the box body 1, an air storage box 14 is arranged on the top of the "U"-shaped frame 13, and an adjustment component is arranged on the "U"-shaped frame 13, and the adjustment component comprises a reciprocating motor 15 fixedly installed on the inner top of the "U"-shaped frame 13, a rotating shaft 16 is fixedly connected to the output shaft of the reciprocating motor 15, an adjusting rod 17 is fixedly installed on the bottom of the rotating shaft 16, and the adjusting rod 17 is fixedly installed on the bottom of the rotating shaft 16. An adjustment groove 37 is provided at the bottom, and a threaded rod 35 is rotatably connected between the inner walls at both ends of the adjustment groove 37. An adjustment block 36 is threadedly sleeved on the outer wall of the threaded rod 35. The adjustment block 36 is slidably connected to the inner walls on both sides of the adjustment groove 37. One end of the threaded rod 35 passes through the inner wall of one end of the adjustment groove 37 and extends out. An adjustment knob 22 located outside the adjustment groove 37 is fixedly installed at one end of the threaded rod 35. A reciprocating rod 19 is provided below the adjustment rod 17. A groove 34 is provided at the top of the reciprocating rod 19. An inner rod 18 is fixedly installed at the bottom of the adjustment block 36. One end of the inner rod 18 is located in the groove 34 and is slidably connected to the inner wall of the groove 34. A pointer 23 is provided on the outer wall of the inner rod 18, and a scale line 24 is provided at the top of the reciprocating rod 19.

[0029] An intelligent welding assembly connected to the adjustment assembly is arranged in the box body 1, and the intelligent welding assembly includes a moving rod 6 which is arranged in the installation groove 20 and is close to the inner walls on both sides of the installation groove 20. One end of the moving rod 6 located above the installation groove 20 is fixedly connected to the bottom of the reciprocating rod 19, and an "L"-shaped block 7 is fixedly installed on one side wall of the moving rod 6. A guide rod 26 is fixedly connected between the "L"-shaped block 7 and the moving rod 6. A mounting block 33 is slidably sleeved on the guide rod 26, and a spring 27 is fixedly connected between the mounting block 33 and the "L"-shaped block 7. A circular hole 39 located below the guide rod 26 is opened on the moving rod 6, and a rotating tube 21 rotatably connected to the mounting block 33 is arranged on the mounting block 33. The rotating tube 21 passes through the circular hole 39, and a stop block 28 is fixedly installed on the end of the rotating tube 21 away from the "L"-shaped block 7, and a reversing motor 8 is fixedly installed on the outer wall of the "L"-shaped block 7 The output shaft of the reversing motor 8 passes through the "L"-shaped block 7 and is rotatably connected with the "L"-shaped block 7. A reversing rod 29 is fixedly installed on the output shaft of the reversing motor 8. The reversing rod 29 is adapted to the rotating tube 21 and one end of the reversing rod 29 is located in the rotating tube 21. A laser welding gun 9 located below the rotating tube 21 is penetrated through the mounting block 33. A blow pipe 32 located below the laser welding gun 9 is fixedly installed on a side wall of the mounting block 33 close to the stop block 28. A first contact switch 30 is arranged on one side wall of the mounting block 33. A second contact switch 31 is arranged on a side wall of the moving rod 6 close to the first contact switch 30. The first contact switch 30 and the second contact switch 31 are both located in the circuit of the reversing motor 8. The stop block 28 is semicircular, and the reversing rod 29 is a square rod. The axis of the laser welding gun 9, the axis of the blow pipe 32 and the axis of the rotating tube 21 are located on the same vertical plane.

[0030] The "U"-shaped frame 13 is provided with a symmetrically arranged protection component, which includes a protection box 11 fixedly installed on the outer wall of the "U"-shaped frame 13, and a connecting rod 25 slidably connected to the outer wall of the "U"-shaped frame 13 is penetrated, one end of the connecting rod 25 is fixedly connected to the reciprocating rod 19, and the other end of the connecting rod 25 is fixedly connected to a piston block 38 slidably connected to the inner wall of the protection box 11, and the protection box 11 is provided with a first protection tube 10 and a second protection tube 12 connected to the interior thereof, the end of the first protection tube 10 away from the protection box 11 is connected to the blowing tube 32, and the end of the second protection tube 12 away from the protection box 11 is connected to the air storage box 14, and the ends of the first protection tube 10 and the second protection tube 12 connected to the protection box 11 are both located on the side of the piston block 38 away from the reciprocating rod 19, and the first protection tube 10 and the second protection tube 12 are both provided with a one-way valve.

[0031] An intelligent welding system for signboard production comprises any one of the intelligent welding devices described above.

[0032] When the present invention is used, in the initial state, the mounting block 33 abuts against the moving rod 6, and the first contact switch 30 and the second contact switch 31 contact each other, so that the reversing motor 8 is started once and its output shaft rotates 180 degrees. The output shaft of the reversing motor 8 drives the square reversing rod 29 to rotate, and the reversing rod 29 is adapted to the rotating tube 21, so that the rotating tube 21 and the abutting block 28 can be rotated 180 degrees. Figure 3 As shown, the arc-shaped member to be welded with a certain curvature is brought into contact with the semicircular abutment block 28, and the semicircular abutment block 28 is located in the middle of the arc-shaped member. Then, two first hydraulic cylinders 2 are provided to bring the two first abutment plates 3 closer to each other, so that the arc-shaped member can be pressed and fixed, and the straight member and the fixed arc-shaped member are abutted against each other. Then, two second hydraulic cylinders 4 are provided to bring the two second abutment plates 5 closer to each other, so that the straight member can be pressed and fixed. By providing a laser welding gun 9, the middle part of the arc weld of the straight member and the arc-shaped member can be welded.

[0033] Then, the reciprocating motor 15 is started, and the reciprocating motor 15 is started to rotate the rotating shaft 16 and the adjusting rod 17 by one circle, so that the inner rod 18 rotates by one circle around the axis direction of the rotating shaft 16. Since the inner rod 18 is located in the groove 34 and is slidably connected to the inner wall of the groove 34, the reciprocating rod 19 can move back and forth left and right, and then the intelligent welding assembly can move left and right as a whole. When the inner rod 18 rotates ninety degrees around the axis of the rotating shaft 16 for the first time, the reciprocating rod 19 will first move to the direction of the vertical surface of the semicircular block 28 to the farthest distance, so that the contact point between the semicircular block 28 and the arc-shaped member can always be located at the rotating shaft. On the vertical plane where the axis of the tube 21, the axis of the laser welding gun 9 and the axis of the air blowing pipe 32 coincide, during this movement, since the inner wall of the arc-shaped part has an arc, it will cause the stop block 28, the rotating tube 21 and the mounting block 33, the laser welding gun 9 and the air blowing pipe 32 to move a distance away from the arc-shaped part, the spring 27 is compressed, and the mounting block 33 drives the first contact switch 30 to move so that the first contact switch 30 gradually moves away from the second contact switch 31, so that the directions of the laser welding gun 9 and the air blowing pipe 32 are moved backward for a distance, thereby adapting to the curvature of the arc-shaped part, and realizing welding of half of the arc weld area;

[0034] When the inner rod 18 rotates ninety degrees for the second time around the axis of the rotating shaft 16, the semicircular abutment 28, the laser welding gun 9 and the air blow pipe 32 move from the farthest distance to the middle section of the arc-shaped part. By setting the spring 27, the semicircular abutment 28 can always be in contact with the arc-shaped inner wall of the arc-shaped part, so that during this movement, the laser welding gun 9 and the air blow pipe 32 gradually approach the arc-shaped part, and the first contact switch 30 gradually approaches the second contact switch 31, so that the distance between the laser welding gun 9 and the air blow pipe 32 and the arc-shaped part is shortened. It can perform self-adjustment in real time, so as to perform secondary repair welding on half of the arc weld of the arc-shaped part, thereby improving the welding quality. When the semicircular block 28 moves to the middle position of the arc-shaped part again, its first contact switch 30 contacts with the second contact switch 31 again, so that the circuit of the reversing motor 8 is connected again, and its output shaft and the reversing rod 29 rotate 180 degrees again, and the reversing rod 29 cooperates with the rotating tube 21, so that the vertical surface of the semicircular block 28 faces the other half of the arc weld.

[0035] When the inner rod 18 rotates ninety degrees for the third time around the axis of the rotating shaft 16, the semicircular block 28 will move to the farthest distance in the direction of the vertical surface of the semicircular block 28 (the other half of the arc weld), and the block 28, the rotating tube 21 and the mounting block 33, the laser welding gun 9 and the air blow pipe 32 will all move a distance away from the arc part, and the spring 27 will be compressed, and the mounting block 33 will drive the first contact switch 30 to move so that the first contact switch 30 gradually moves away from the second contact switch 31, so that the directions of the laser welding gun 9 and the air blow pipe 32 will move backward for a distance, thereby adapting to the curvature of the arc part to achieve welding of the other half of the arc weld, and when the inner rod 18 rotates ninety degrees for the fourth time around the axis of the rotating shaft 16, the semicircular block 28, the laser welding gun 9 and The air blow pipe 32 moves from the farthest distance to the middle section of the arc-shaped part. The spring 27 is provided to ensure that the semicircular abutment 28 always abuts against the arc-shaped inner wall of the arc-shaped part. During this movement, the laser welding gun 9 and the air blow pipe 32 gradually approach the arc-shaped part, and the first contact switch 30 gradually approaches the second contact switch 31, thereby performing secondary repair welding on the other half of the arc-shaped weld of the arc-shaped part. When the semicircular abutment 28 moves to the middle section of the arc-shaped part again, the first contact switch 30 contacts the second contact switch 31 again, thereby connecting the circuit of the reversing motor 8 again, and the output shaft and the reversing rod 29 rotate one hundred and eighty degrees again, and the reversing rod 29 cooperates with the rotating tube 21 to change the vertical direction of the semicircular abutment 28.

[0036] During the reciprocating motion of the reciprocating rod 19, the connecting rod 25 is provided to enable the piston blocks 38 in the two protection boxes 11 to move left and right. During the motion of both piston blocks 38 to the left or right, the argon gas in the gas storage box 14 will be sucked into one of the protection boxes 11 through the second protection tube 12, and the argon gas in the other protection box 11 will be squeezed into the blowing tube 32 through the first protection tube 10 on the other protection box 11 and sprayed out at the weld. Since argon gas is an inert gas, its chemical properties are very stable and it is not easy to react chemically with other substances. Therefore, during the laser welding process, argon gas can effectively isolate the air from the argon gas. Oxygen can be used to prevent the weld from reacting with oxygen at high temperature, thereby avoiding oxidation of the weld and ensuring the quality of the weld. Before starting the reciprocating motor 15, the threaded rod 35 can be rotated by turning the adjusting knob 22, so that the adjusting block 36 can move toward or away from the rotating shaft 16. The adjusting block 36 drives the inner rod 18 to move. By setting the pointer 23 and the scale line 24, the straight-line distance between the axis of the inner rod 18 and the axis of the rotating shaft 16 can be adjusted, and then the reciprocating distance of the reciprocating rod 19 can be adjusted, so as to weld arc welds of different lengths and meet the welding requirements of arc parts of different lengths. It is easy to use.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligent welding device for signboard production, comprising a box (1), characterized in that: The inner top and inner bottom of the box body (1) are both fixedly mounted with a first hydraulic cylinder (2) and a second hydraulic cylinder (4); the telescopic ends of the two first hydraulic cylinders (2) are both fixedly mounted with a first abutment plate (3); the telescopic ends of the two second hydraulic cylinders (4) are both fixedly mounted with a second abutment plate (5); a mounting groove (20) is provided on the top of the box body (1); a "U"-shaped frame (13) is fixedly mounted on the top of the box body (1); an air storage box (14) is provided on the top of the "U"-shaped frame (13); an adjustment component is provided on the "U"-shaped frame (13); the adjustment component comprises a reciprocating motor (15) fixedly mounted on the inner top of the "U"-shaped frame (13); an output shaft of the reciprocating motor (15) is fixedly connected to the output shaft of the reciprocating motor (15); A rotating shaft (16) is provided, an adjusting rod (17) is fixedly mounted at the bottom of the rotating shaft (16), an adjusting groove (37) is provided at the bottom of the adjusting rod (17), a threaded rod (35) is rotatably connected between the inner walls at both ends of the adjusting groove (37), an adjusting block (36) is threadedly sleeved on the outer wall of the threaded rod (35), the adjusting block (36) is slidably connected to the inner walls at both sides of the adjusting groove (37), one end of the threaded rod (35) penetrates the inner wall at one end of the adjusting groove (37) and extends out, an adjusting knob (22) located outside the adjusting groove (37) is fixedly mounted at one end of the threaded rod (35), a reciprocating rod (19) is provided below the adjusting rod (17), and a groove is provided on the top of the reciprocating rod (19) (34), an inner rod (18) is fixedly installed at the bottom of the adjustment block (36), one end of the inner rod (18) is located in the groove (34) and is slidably connected to the inner wall of the groove (34), an intelligent welding assembly connected to the adjustment assembly is arranged in the box body (1), the intelligent welding assembly includes a moving rod (6) which is arranged through the installation groove (20) and is close to the inner walls on both sides of the installation groove (20), one end of the moving rod (6) located above the installation groove (20) is fixedly connected to the bottom of the reciprocating rod (19), an "L"-shaped block (7) is fixedly installed on one side wall of the moving rod (6), a guide rod (26) is fixedly connected between the "L"-shaped block (7) and the moving rod (6), and a sliding sleeve on the guide rod (26) A mounting block (33) is provided, a spring (27) is fixedly connected between the mounting block (33) and the "L"-shaped block (7), a circular hole (39) is provided on the moving rod (6) and is located below the guide rod (26), a rotating tube (21) is provided through the mounting block (33) and is rotatably connected thereto, the rotating tube (21) passes through the circular hole (39), a stop block (28) is fixedly installed on one end of the rotating tube (21) away from the "L"-shaped block (7), a reversing motor (8) is fixedly installed on the outer wall of the "L"-shaped block (7), an output shaft of the reversing motor (8) passes through the "L"-shaped block (7) and is rotatably connected to the "L"-shaped block (7), and a reversing rod (29) is fixedly installed on the output shaft of the reversing motor (8),The reversing rod (29) is adapted to the rotating tube (21) and one end of the reversing rod (29) is located in the rotating tube (21). A laser welding gun (9) located below the rotating tube (21) is provided through the mounting block (33). A blowpipe (32) located below the laser welding gun (9) is fixedly installed on a side wall of the mounting block (33) close to the stop block (28). A first contact switch (30) is provided on a side wall of the mounting block (33). A second contact switch (31) is provided on a side wall of the moving rod (6) close to the first contact switch (30). Both the first contact switch (30) and the second contact switch (31) are located in the circuit of the reversing motor (8). The U-shaped frame (13) is provided with symmetrically arranged A protection assembly, the protection assembly comprising a protection box (11) fixedly mounted on the outer wall of a "U"-shaped frame (13), a connecting rod (25) slidably connected to the outer wall of the "U"-shaped frame (13) being provided through the outer wall, one end of the connecting rod (25) being fixedly connected to a reciprocating rod (19), the other end of the connecting rod (25) being fixedly connected to a piston block (38) slidably connected to the inner wall of the protection box (11), the protection box (11) being provided with a first protection tube (10) and a second protection tube (12) connected to the interior thereof, the end of the first protection tube (10) away from the protection box (11) being connected to the blowing tube (32), the end of the second protection tube (12) away from the protection box (11) being connected to the air storage box (14).

2. The intelligent welding device for signboard production according to claim 1 is characterized in that: A pointer (23) is provided on the outer side wall of the inner rod (18), and a scale line (24) is provided on the top of the reciprocating rod (19).

3. The intelligent welding device for signboard production according to claim 2 is characterized in that: The stop block (28) is semicircular, the reversing rod (29) is a square rod, and the axis of the laser welding gun (9), the axis of the air blowing pipe (32), and the axis of the rotating pipe (21) are located on the same vertical plane.

4. The intelligent welding device for signboard production according to claim 3 is characterized in that: The ends of the first protection tube (10) and the second protection tube (12) that are in communication with the protection box (11) are both located on a side of the piston block (38) away from the reciprocating rod (19), and one-way valves are provided in the first protection tube (10) and the second protection tube (12).

5. An intelligent welding system for signboard production, characterized in that: The invention comprises an intelligent welding device as described in any one of claims 1 to 4.

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