Aluminum alloy pipeline welding device and welding method thereof

Abstract

The invention is suitable for the technical field of aluminum alloy welding, and provides an aluminum alloy pipeline welding device and a welding method thereof.The aluminum alloy pipeline welding device comprises a welding unit and a slow cooling unit; the welding unit comprises a supporting frame, a displacement air cylinder, a displacement sliding block, an electric telescopic rod, a rotating disc, a sliding rail, an electric sliding block, an adjusting piece and a welding gun. The slow cooling unit comprises a fixing plate, a fixing block, a telescopic air cylinder, a telescopic plate, an arc-shaped rail, an electric arc block, a heating plate and an electric heating wire. The four to-be-welded areas of the aluminum alloy pipeline and the flange are divided, the four to-be-welded areas do not make contact with spot welding on the formal welding path, welding operation continues after impurities on the surface of the spot welding area are ground through the angle grinder, and therefore the strength and the sealing performance of a welding seam are improved, and the welding efficiency is improved. And the welding quality of the welding position of the aluminum alloy pipeline and the flange is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum alloy welding, and more specifically, it relates to an aluminum alloy pipe welding device and a welding method thereof. Background Art

[0002] An aluminum alloy pipe is a pipe made of aluminum alloy material and is used for transporting liquids, gases or other media; due to its light weight, corrosion resistance, good thermal conductivity, high strength and other characteristics, aluminum alloy pipes are widely used in many fields; among them, the welding of aluminum alloy pipes is one of the important processes in the processing and installation of aluminum alloy pipes.

[0003] In the prior art, the welding of aluminum alloy pipes needs to select a suitable welding position according to the specific application scenario. When welding an aluminum alloy pipe with a flange, first, the aluminum alloy pipe and the flange need to be centered to ensure that the center lines of the pipe and the flange are consistent; then, the pipe and the flange are fixed by using a fixture or spot welding fixation method to prevent displacement during the welding process; finally, continuous welding is carried out with a welding torch to achieve a reliable connection between the aluminum alloy pipe and the flange.

[0004] However, during the formal welding process, the welding path will coincide with the spot welding area. There are slag or oxides that are not completely melted in the spot welding area. When welding formally again, the impurities in the spot welding area will be wrapped in the weld, forming pores or slag inclusions, thereby reducing the strength and tightness of the weld, and further affecting the welding quality at the welding joint of the aluminum alloy pipe and the flange.

[0005] At the same time, welding again before the thermal stress in the spot welding area is completely released will cause the thermal stress to concentrate in the spot welding area, resulting in welding deformation, affecting the shape and size of the welding joint, and being unfavorable to the welding quality and efficiency; for this reason, an aluminum alloy pipe welding device and a welding method thereof are proposed to improve the existing problems. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an aluminum alloy pipe welding device and a welding method thereof.

[0007] To achieve the above object, the present invention provides the following technical solution: An aluminum alloy pipe welding device, comprising a carrying unit, a welding unit, and a slow cooling unit; wherein, the carrying unit includes a carrying frame, a lifting cylinder disposed within the carrying frame, a lifting table disposed at the telescopic end of the lifting cylinder, lifting plates symmetrically disposed at both ends of the lifting table in the radial direction, pulleys symmetrically disposed in the lifting plates in the axial direction, pressing cylinders symmetrically disposed on one side of the carrying frame in the radial direction, a pressing plate rotatably connected to the telescopic end of the pressing cylinder, and a vertical block rotatably connected to the side wall of the pressing plate; one end of the vertical block away from the pressing plate is connected to the top of the carrying frame; the welding unit is disposed at one end of the carrying frame and includes a support frame, a displacement cylinder disposed on one side of the support frame, a displacement slider disposed at the telescopic end of the displacement cylinder, an electric telescopic rod disposed on the side wall of the displacement slider, a rotating disk rotatably connected to the telescopic end of the electric telescopic rod, slide rails uniformly disposed in the circumferential direction on the side wall of the rotating disk, electric sliders sliding on the slide rails, an adjusting member disposed on the side of the electric slider away from the slide rail, and a welding torch disposed at one end of the adjusting member; the adjusting member can adjust the welding angle of the welding torch and can also reverse the angle of the welding torch to reduce the trailing of the welding wire; the slow cooling unit is disposed on one side of the adjusting member and includes a fixing plate, a fixing block disposed on the side wall of the fixing plate, a telescopic cylinder disposed at one end of the fixing block, a telescopic plate disposed at the telescopic end of the telescopic cylinder, arc-shaped tracks symmetrically disposed in the telescopic plate, electric arc blocks sliding on the arc-shaped tracks, a heating plate disposed on the side of the electric arc block away from the arc-shaped track, and electric heating wires disposed on the side wall of the heating plate.

[0008] The present invention is further configured such that: a carrying plate is further disposed on the top of the carrying frame, and through grooves are symmetrically disposed in the radial direction on the top of the carrying plate, and one end of the lifting plate away from the lifting table can penetrate through the corresponding through groove.

[0009] The present invention is further configured such that: a placement groove is further opened at one end of the lifting plate away from the lifting table, the placement groove is arc-shaped, the pulleys can be symmetrically distributed with respect to the placement groove, and both ends of the pulleys can be rotatably connected to the corresponding inner walls of the lifting plate.

[0010] The present invention is further configured such that: a pressing groove is opened on the side wall of the pressing plate, the pressing groove is arc-shaped, and a rubber pad is disposed in the pressing groove.

[0011] The present invention is further configured such that: a long track is provided on the side of the displacement slider away from the electric telescopic rod, the displacement slider can slide on the long track, and the side of the long track away from the displacement slider is connected to the side wall of the support frame; on the side wall of the support frame close to the displacement cylinder in the radial direction, long plates are symmetrically provided, fixed pulleys are rotatably connected to both ends of the long plates, the outer ring of the rotating disk can be in rolling connection with the fixed pulleys in a matching manner, and a perforation is provided in the middle of the rotating disk.

[0012] The present invention is further configured such that: the adjusting member includes an extension plate, an adjusting motor provided on one side of the extension plate, and an adjusting plate provided at the output end of the adjusting motor; one side of the extension plate can be connected to the side wall of the electric slider away from the slide rail, the adjusting motor is located on the side of the extension plate close to the electric slider, the output end of the adjusting motor penetrates through the extension plate and is connected to the adjusting plate, and the welding torch is located at one end of the adjusting plate.

[0013] The present invention is further configured such that: an arc-shaped plate is provided at the end of the adjusting plate away from the welding torch, angle values are provided on the arc-shaped plate, and a pointing arrow is further provided on the side wall of the extension plate close to the adjusting plate, and one end of the pointing arrow is located on the angle values.

[0014] The present invention is further configured such that: the side of the fixing plate away from the fixed block is connected to the side wall of the rotating disk close to the slide rail, the telescopic end of the telescopic cylinder penetrates through the fixed block and is connected to the telescopic plate, the telescopic plate is arc-shaped, a cavity is provided inside the telescopic plate, and the cavity can penetrate through both ends of the telescopic plate.

[0015] The present invention is further configured such that: the arc-shaped tracks are symmetrically distributed in the cavity, the heating plate is arc-shaped, a heating groove is provided on the side wall of the heating plate close to the electric heating wire, the end face of the heating groove is in an inverted U shape, and the electric heating wire is located in the heating groove.

[0016] An aluminum alloy pipeline welding method, using the aluminum alloy pipeline welding device as described above, includes the following steps: S1. Place the aluminum alloy pipeline that has been spot-welded on the carrier frame so that the end spot-welded to the flange is close to the support frame. Then start the lifting cylinder, and its telescopic end pushes the lifting platform to move upward, so that the lifting plate and the pulley are displaced synchronously, lift the aluminum alloy pipeline, and make the aluminum alloy pipeline at a height convenient for welding. S2. During the operation of S1, the pressing cylinder is started simultaneously, and its telescopic end pushes the pressing plate to rotate along the side wall of the vertical block, so that the pressing plate approaches the aluminum alloy pipeline, presses the aluminum alloy pipeline, and cooperates with the lifting plate to fix and clamp the aluminum alloy pipeline. S3. When welding the aluminum alloy pipe and the flange, on the one hand, the electric slider starts, drives the adjusting part and the welding torch, and slides along the opening direction of the slide rail, so that the welding torch approaches the welding joint of the aluminum alloy pipe and the flange, and welds the area to be welded; on the other hand, the displacement cylinder also starts, its telescopic end extends, pushes the displacement slider to slide, so that the electric telescopic rod also moves synchronously, and pulls the rotating disc to rotate, so that the four welding torches can continuously weld in the corresponding welding areas, and stop welding when approaching the spot welding area without contacting the four spot welding areas; S4. During the working process of S3, the electric telescopic rod starts, and its telescopic end will extend or retract with the rotation of the rotating disc and the distance between the rotating disc and the electric telescopic rod itself; the adjusting part can adjust the welding angle of the welding torch, so that the welding torch always maintains the best welding inclination angle, and at the same time can also reversely rotate the angle of the welding torch to reduce the wire trailing at the end of welding; S5. After the preliminary welding is completed, the spot welding area is polished by a angle grinder to remove the impurities on the surface of the spot welding area. At this time, there is a gap between the spot welding area and the tail of the continuous welding; then the telescopic cylinder starts, drives the telescopic plate to approach the spot welding area and the tail of the continuous welding, and covers the two areas; S6. During the working process of S5, the two electric arc blocks also start, drive the heating plate and the electric heating wire, and slide along the opening direction of the arc track, so that the two heating plates leave the inside of the telescopic plate and gradually unfold, so that one of the heating plates covers the spot welding area, and the other heating plate covers the tail of the continuous welding, so as to achieve the purpose of heating and slow cooling of the corresponding area by the corresponding electric heating wire.

[0017] In summary, the present application includes at least one of the following beneficial technical effects: (1) By dividing the area to be welded of the aluminum alloy pipe and the flange, the area to be welded is divided into four, and does not contact the spot welding during the welding path of the formal welding. After the impurities on the surface of the spot welding area are polished by a angle grinder, the welding operation is continued, thus avoiding the problem that there are incompletely melted welding slag or oxides in the spot welding area. When welding formally again, the impurities in the spot welding area will be wrapped in the weld, forming pores or slag inclusions, thereby improving the strength and sealing performance of the weld, and further improving the welding quality of the welding joint between the aluminum alloy pipe and the flange.

[0018] (2) By adjusting the welding angle of the welding torch, the welding torch always maintains the best welding inclination angle, and at the same time can also reversely rotate the angle of the welding torch to reduce the wire trailing at the end of welding, thus ensuring the aesthetics of the weld and improving the performance of the welding joint.

[0019] (3) By simultaneously heating and slow cooling the spot welding area and the tail of the formal welding, the tail of the formal welding is maintained at a certain temperature to ensure the efficiency during subsequent welding; the spot welding area is slowly cooled, avoiding the problem that re-welding occurs before the thermal stress in the spot welding area is fully released, which would cause the thermal stress to concentrate in the spot welding area and lead to welding deformation. This ensures the shape and size of the welded joint, which is beneficial to the quality and efficiency of welding. Description of the Drawings

[0020] Figure 1 This is a schematic diagram of the overall structure of the aluminum alloy pipe welding device of the present invention.

[0021] Figure 2 This is a partial schematic diagram of the bearing unit of the present invention.

[0022] Figure 3 This is another partial schematic diagram of the bearing unit of the present invention.

[0023] Figure 4 This is a schematic diagram of the overall structure of the welding unit of the present invention.

[0024] Figure 5 This is a schematic diagram of the overall structure of the rotating disk and the perforation of the present invention.

[0025] Figure 6 This is a schematic diagram of the overall structure of the adjusting member of the present invention.

[0026] Figure 7 This is a schematic diagram of the overall structure of the slow cooling unit of the present invention.

[0027] Figure 8 This is an exploded view of the slow cooling unit of the present invention.

[0028] Description of the reference numerals: 1. Bearing unit; 11. Bearing frame; 111. Bearing plate; 112. Through groove; 12. Lifting cylinder; 13. Lifting table; 14. Lifting plate; 141. Placing groove; 15. Pulley; 16. Pressing cylinder; 17. Pressing plate; 171. Pressing groove; 172. Rubber pad; 18. Standing block; 2. Welding unit; 21. Support frame; 211. Long plate; 212. Fixed pulley; 22. Displacement cylinder; 23. Displacement slider; 231. Long track; 24. Electric telescopic rod; 25. Rotating disk; 251. Perforation; 26. Slide rail; 27. Electric slider; 28. Adjusting member; 281. Extension plate; 282. Adjusting motor; 283. Adjusting plate; 284. Arc plate; 285. Angle value; 286. Pointing arrow; 29. Welding torch; 3. Slow cooling unit; 31. Fixed plate; 32. Fixed block; 33. Telescopic cylinder; 34. Telescopic plate; 341. Cavity; 35. Arc track; 36. Electric arc block; 37. Heating plate; 371. Heating groove; 38. Electric heating wire. Detailed implementation mode

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0030] Please refer to Figures 1-8 , the present invention provides the following technical solutions: Example 1, refer to Figures 1-8 , an aluminum alloy pipe welding device, including a carrying unit 1, a welding unit 2 and a slow cooling unit 3; wherein, the function of the carrying unit 1 is to both carry and support the aluminum alloy pipe to ensure that the center lines of the pipe and the flange are consistent, and to fix and clamp the aluminum alloy pipe to prevent displacement during the welding process; thus realizing the reliable connection between the aluminum alloy pipe and the flange.

[0031] On the one hand, the main purpose of the welding unit 2 is to divide the welding areas of the aluminum alloy pipe and the flange, so that there are four welding areas respectively, and the welding path during formal welding does not contact the spot welding. After grinding the impurities on the surface of the spot welding area with a angle grinder, the welding operation is continued, thus avoiding the problem that there are incompletely melted welding slag or oxides in the spot welding area. When welding formally again, the impurities in the spot welding area will be wrapped in the weld seam, forming pores or slag inclusions, thereby improving the strength and tightness of the weld seam, and further improving the welding quality of the welding joint between the aluminum alloy pipe and the flange.

[0032] On the other hand, it can also adjust the welding angle of the welding torch 29, so that the welding torch 29 always maintains the best welding inclination angle, and at the same time, the angle of the welding torch 29 can be rotated reversely to reduce the wire trailing at the end of welding, thereby ensuring the aesthetics of the weld seam and improving the performance of the welding joint.

[0033] The function of the slow cooling unit 3 is to heat and slow cool the spot welding area and the tail of the formal welding at the same time, so that the tail of the formal welding maintains a certain amount of heat to ensure the efficiency during subsequent welding; to slowly cool the spot welding area, avoiding the problem that the thermal stress in the spot welding area is not fully released and then welding again, which will cause the thermal stress to concentrate in the spot welding area, resulting in welding deformation, thus ensuring the shape and size of the welding joint, which is beneficial to the welding quality and efficiency.

[0034] Refer to Figures 1-3, specifically, the bearing unit 1 includes a bearing frame 11, a lifting cylinder 12 disposed within the bearing frame 11, a lifting platform 13 disposed at the telescopic end of the lifting cylinder 12, lifting plates 14 symmetrically disposed at both ends of the lifting platform 13 in the radial N direction, pulleys 15 symmetrically disposed within the lifting plates 14 in the axial M direction, pressing cylinders 16 symmetrically disposed on one side of the bearing frame 11 in the radial N direction, a pressing plate 17 rotatably connected to the telescopic end of the pressing cylinder 16, and a vertical block 18 rotatably connected to the side wall of the pressing plate 17; one end of the vertical block 18 away from the pressing plate 17 is connected to the top of the bearing frame 11.

[0035] Among them, first place the aluminum alloy pipe that has been spot-welded on the bearing frame 11, such that the end spot-welded to the flange is close to the support frame 21. Subsequently, start the lifting cylinder 12, and its telescopic end pushes the lifting platform 13 to move upward, thereby causing the lifting plates 14 and the pulleys 15 to be displaced synchronously, lifting the aluminum alloy pipe, and placing the aluminum alloy pipe at a height convenient for welding.

[0036] During this process, the pressing cylinder 16 is started simultaneously, and its telescopic end pushes the pressing plate 17 to rotate along the side wall of the vertical block 18, causing the pressing plate 17 to approach the aluminum alloy pipe, pressing the aluminum alloy pipe, and cooperating with the lifting plates 14 to fixedly clamp the aluminum alloy pipe, thereby realizing a reliable connection between the aluminum alloy pipe and the flange.

[0037] Refer to Figures 4-6 , specifically, the welding unit 2 is disposed at one end of the bearing frame 11 and includes a support frame 21, a displacement cylinder 22 disposed on one side of the support frame 21, a displacement slider 23 disposed at the telescopic end of the displacement cylinder 22, an electric telescopic rod 24 disposed on the side wall of the displacement slider 23, a rotating disk 25 rotatably connected to the telescopic end of the electric telescopic rod 24, slide rails 26 uniformly disposed in the circumferential direction on the side wall of the rotating disk 25, an electric slider 27 sliding on the slide rails 26, an adjusting member 28 disposed on the side of the electric slider 27 away from the slide rails 26, and a welding torch 29 disposed at one end of the adjusting member 28; the adjusting member 28 can adjust the welding angle of the welding torch 29 and can also reversely rotate the angle of the welding torch 29 to reduce the trailing of the welding wire.

[0038] When welding the aluminum alloy pipe and the flange, on the one hand, the electric slider 27 starts, drives the adjusting member 28 and the welding torch 29, and slides along the opening direction of the slide rail 26, so that the welding torch 29 approaches the welding joint of the aluminum alloy pipe and the flange, and welds the area to be welded; on the other hand, the displacement cylinder 22 also starts, its telescopic end extends, pushes the displacement slider 23 to slide, so that the electric telescopic rod 24 also displaces synchronously, and pulls the rotating disc 25 to rotate, so that the four welding torches 29 can continuously weld in the corresponding welding areas, stop welding when approaching the spot welding area, do not contact the four spot welding areas, and continue the welding operation after grinding the impurities on the surface of the spot welding area with a grinding wheel, thus avoiding the problem that there are incompletely melted welding slag or oxides in the spot welding area. When welding formally again, the impurities in the spot welding area will be wrapped in the weld seam, forming pores or slag inclusions, thereby improving the strength and tightness of the weld seam, and further improving the welding quality of the welding joint between the aluminum alloy pipe and the flange.

[0039] During this process, the electric telescopic rod 24 starts, and its telescopic end will extend or retract with the rotation of the rotating disc 25 and the distance between the rotating disc 25 and the electric telescopic rod 24 itself; the adjusting member 28 can adjust the welding angle of the welding torch 29, so that the welding torch 29 always maintains the best welding inclination angle, and at the same time can also reverse the angle of the welding torch 29 to reduce the wire trailing at the end of welding, thus ensuring the aesthetics of the weld seam and improving the performance of the welding joint.

[0040] Refer to Figures 7-8 , specifically, the slow cooling unit 3 is arranged on one side of the adjusting member 28, and it includes a fixing plate 31, a fixing block 32 arranged on the side wall of the fixing plate 31, a telescopic cylinder 33 arranged at one end of the fixing block 32, a telescopic plate 34 arranged at the telescopic end of the telescopic cylinder 33, arc-shaped tracks 35 symmetrically arranged in the telescopic plate 34, electric arc blocks 36 sliding on the arc-shaped tracks 35, a heating plate 37 arranged on the side of the electric arc block 36 away from the arc-shaped track 35, and electric heating wires 38 arranged on the side wall of the heating plate 37.

[0041] After the preliminary welding is completed, there is a gap between the spot welding area and the tail of the continuous welding at this time; subsequently, the telescopic cylinder 33 is activated to drive the telescopic plate 34 to approach the spot welding area and the tail of the continuous welding, covering the two areas; during this process, the two electric arc blocks 36 are also activated to drive the heating plate 37 and the electric heating wire 38 to slide along the opening direction of the arc track 35, so that the two heating plates 37 move out of the inside of the telescopic plate 34 and gradually unfold, so that one of the heating plates 37 covers the spot welding area, and the other heating plate 37 covers the tail of the continuous welding, so as to achieve the purpose of heating and slow cooling of the corresponding area by the corresponding electric heating wire 38; keeping a certain amount of heat at the tail of the formal welding to ensure the efficiency during subsequent welding; slowly cooling the spot welding area, avoiding the problem that the thermal stress in the spot welding area is not fully released and then welding again, which will cause the thermal stress to concentrate in the spot welding area, resulting in welding deformation, thus ensuring the shape and size of the welded joint and being beneficial to the welding quality and efficiency.

[0042] Refer to Figures 1-3 , further, a bearing plate 111 is further provided on the top of the bearing frame 11, and through grooves 112 are symmetrically provided in the radial N direction on the top of the bearing plate 111. One end of the lifting plate 14 away from the lifting platform 13 can penetrate through the corresponding through groove 112.

[0043] Refer to Figures 1-3 , furthermore, a placement groove 141 is formed at one end of the lifting plate 14 away from the lifting platform 13. The placement groove 141 is arc-shaped. The pulleys 15 can be symmetrically distributed with respect to the placement groove 141, and both ends of the pulleys 15 can be rotatably connected to the corresponding inner walls of the lifting plate 14; a pressing groove 171 is formed on the side wall of the pressing plate 17. The pressing groove 171 is arc-shaped, and a rubber pad 172 is arranged in the pressing groove 171.

[0044] Among them, through the design of the through groove 112, when the lifting platform 13 moves upward, the two lifting plates 14 can only move upward along the corresponding through groove 112, thus achieving the purpose of guiding.

[0045] When the pressing plate 17 rotates, the pressing groove 171 will gradually approach the outer wall of the aluminum alloy pipe and fit tightly with the outer wall of the aluminum alloy pipe. At the same time, the rubber pad 172 will also firmly squeeze the outer wall of the aluminum alloy pipe, thus ensuring the stability of the aluminum alloy pipe.

[0046] Refer to Figures 4-5, Further, a long track 231 is provided on the side of the displacement slider 23 away from the electric telescopic rod 24. The displacement slider 23 can slide on the long track 231, and the side of the long track 231 away from the displacement slider 23 is connected to the side wall of the support frame 21; on the side wall of the support frame 21 close to the displacement cylinder 22 in the radial N direction, long plates 211 are symmetrically provided. Fixed pulleys 212 are rotatably connected to both ends of the long plate 211, and the outer ring of the rotating disk 25 can be in rolling connection with the fixed pulleys 212 in a matching manner. A perforation 251 is provided in the middle of the rotating disk 25.

[0047] Among them, when the displacement cylinder 22 is activated, it will push the displacement slider 23 to slide on the long track 231, so that the electric telescopic rod 24 also moves synchronously, and pulls the rotating disk 25 to rotate. During this process, the four fixed pulleys 212 will also rotate, and at the same time, the four fixed pulleys 212 also play a role in support and guidance.

[0048] It should be noted that the diameter of the perforation 251 is larger than that of the flange and the aluminum alloy pipe. Therefore, the end of the aluminum alloy pipe spot-welded to the flange can be placed through the perforation 251.

[0049] Refer to Figure 6 , Further, the adjusting member 28 includes an extension plate 281, an adjusting motor 282 provided on one side of the extension plate 281, and an adjusting plate 283 provided at the output end of the adjusting motor 282; one side of the extension plate 281 can be connected to the side wall of the electric slider 27 away from the slide rail 26. The adjusting motor 282 is located on the side of the extension plate 281 close to the electric slider 27. The output end of the adjusting motor 282 penetrates the extension plate 281 and is connected to the adjusting plate 283. The welding torch 29 is located at one end of the adjusting plate 283.

[0050] Among them, when the welding torch 29 approaches the welding joint of the aluminum alloy pipe and the flange, the adjusting motor 282 is activated to drive the adjusting plate 283 to rotate, so that the adjusting plate 283 can drive the welding torch 29 to rotate synchronously, so that the welding torch 29 is at the best tilting angle for welding; and during the rotation of the rotating disk 25, the tilting angle of the welding torch 29 is adjusted at any time, so that the welding torch 29 always maintains the best welding tilting angle, thereby improving the welding quality.

[0051] When the welding torch 29 welds to the tail, that is, when it is close to the spot welding area, the adjusting motor 282 is activated to drive the adjusting plate 283 and the welding torch 29 to rotate in the opposite direction, so that the welding wire at the tail can be quickly broken, reducing the welding wire trailing at the end of the welding, thereby ensuring the beauty of the weld and improving the performance of the welding joint.

[0052] Refer to Figure 6, Further, an arc-shaped plate 284 is provided at one end of the adjusting plate 283 away from the welding torch 29. An angular value 285 is provided on the arc-shaped plate 284. A pointing arrow 286 is also provided on the side wall of the extension plate 281 close to the adjusting plate 283. One end of the pointing arrow 286 is located on the angular value 285.

[0053] Among them, during the rotation process of the adjusting plate 283, the angular value 285 will also change, and the pointing arrow 286 will point to the value of the inclination angle of the welding torch 29; the angular value 285 generally includes angles from 0 to 90 degrees and from 0 to -20 degrees. By observing the angular value pointed by the pointing arrow 286, the value of the inclination angle of the welding torch 29 can be known.

[0054] Embodiment 2: Through the technical solution of Embodiment 1, although the problems in the prior art that there are unmelted welding slag or oxides in the spot welding area, and when welding again formally, the impurities in the spot welding area will be wrapped in the weld seam, forming pores or slag inclusions, and the problem of the existence of welding wires at the tail of welding are solved, however, the problem that when welding again without completely releasing the thermal stress in the spot welding area, the thermal stress will be concentrated in the spot welding area, resulting in welding deformation is still not solved; for this reason, the following solution is proposed now: Refer to Figures 7-8 , Further, one side of the fixing plate 31 away from the fixing block 32 is connected to the side wall of the rotating disk 25 close to the slide rail 26. The telescopic end of the telescopic cylinder 33 penetrates through the fixing block 32 and is connected to the telescopic plate 34. The telescopic plate 34 is arc-shaped, and a cavity 341 is provided inside the telescopic plate 34. The cavity 341 can penetrate through both ends of the telescopic plate 34.

[0055] Refer to Figures 7-8 , Further, arc-shaped tracks 35 are symmetrically distributed inside the cavity 341. The heating plate 37 is arc-shaped. A heating groove 371 is provided on the side wall of the heating plate 37 close to the electric heating wire 38. The end face of the heating groove 371 is in an inverted U shape, and the electric heating wire 38 is located inside the heating groove 371.

[0056] Among them, when the two electric arc blocks 36 are started, they drive the heating plate 37 to slide along the opening direction of the arc-shaped track 35, so that the two heating plates 37 leave the cavity 341 and gradually unfold, so that one of the heating plates 37 covers the spot welding area, and the other heating plate 37 covers the tail of the continuous welding, so as to achieve the purpose of heating and slow cooling of the corresponding area by the corresponding electric heating wire 38.

[0057] Embodiment 3: A method for welding aluminum alloy pipes, using the aluminum alloy pipe welding device as described above, includes the following steps: S1. Place the spot-welded aluminum alloy pipe on the carrier 11, with the end spot-welded to the flange close to the support frame 21. Then start the lifting cylinder 12, and its telescopic end pushes the lifting platform 13 to move upward, so that the lifting plate 14 and the pulley 15 are displaced synchronously, lifting the aluminum alloy pipe to a height convenient for welding.

[0058] S2. During the operation of S1, the pressing cylinder 16 starts simultaneously. Its telescopic end pushes the pressing plate 17 to rotate along the side wall of the vertical block 18, making the pressing plate 17 close to the aluminum alloy pipe, pressing the aluminum alloy pipe, and cooperating with the lifting plate 14 to fixedly clamp the aluminum alloy pipe.

[0059] S3. When welding the aluminum alloy pipe and the flange, on the one hand, the electric slider 27 starts, driving the adjusting member 28 and the welding torch 29 to slide along the opening direction of the slide rail 26, so that the welding torch 29 approaches the welding joint of the aluminum alloy pipe and the flange and welds the area to be welded; on the other hand, the displacement cylinder 22 also starts, and its telescopic end extends, pushing the displacement slider 23 to slide, so that the electric telescopic rod 24 also moves synchronously and pulls the rotating disc 25 to rotate, so that the four welding torches 29 can continuously weld in the corresponding welding areas, stop welding when approaching the spot-welding area, and do not contact the four spot-welding areas.

[0060] S4. During the operation of S3, the electric telescopic rod 24 starts, and its telescopic end will extend or retract with the rotation of the rotating disc 25 and the distance between the rotating disc 25 and the electric telescopic rod 24 itself; the adjusting member 28 can adjust the welding angle of the welding torch 29, so that the welding torch 29 always maintains the best welding inclination angle, and at the same time, the angle of the welding torch 29 can be reversed to reduce the wire trailing at the end of welding.

[0061] S5. After the preliminary welding is completed, use a grinding machine to polish the spot-welding area to remove the impurities on the surface of the spot-welding area. At this time, there is a gap between the spot-welding area and the tail of the continuous welding; then the telescopic cylinder 33 starts, driving the telescopic plate 34 to approach the spot-welding area and the tail of the continuous welding to cover the two areas.

[0062] S6. During the operation of S5, the two electric arc blocks 36 also start, driving the heating plate 37 and the electric heating wire 38 to slide along the opening direction of the arc track 35, so that the two heating plates 37 leave the inside of the telescopic plate 34 and gradually unfold, so that one of the heating plates 37 covers the spot-welding area, and the other heating plate 37 covers the tail of the continuous welding, so as to achieve the purpose of heating and slow cooling of the corresponding area by the corresponding electric heating wire 38.

[0063] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

Claims

1. An aluminum alloy pipeline welding device, characterized in that: include, A bearing unit (1), comprising a bearing frame (11), a lifting cylinder (12) arranged in the bearing frame (11), a lifting platform (13) arranged at the telescopic end of the lifting cylinder (12), a lifting plate (14) symmetrically arranged at both ends of the lifting platform (13) in a radial direction, a pulley (15) symmetrically arranged in the lifting plate (14) in an axial direction, a pressing cylinder (16) symmetrically arranged on one side of the bearing frame (11) in a radial direction, a pressing plate (17) rotatably connected to the telescopic end of the pressing cylinder (16), and a vertical block (18) rotatably connected to the side wall of the pressing plate (17); an end of the vertical block (18) away from the pressing plate (17) is connected to the top of the bearing frame (11); A welding unit (2) is arranged at one end of the carrier frame (11), comprising a support frame (21), a displacement cylinder (22) arranged at one side of the support frame (21), a displacement slider (23) arranged at the telescopic end of the displacement cylinder (22), an electric telescopic rod (24) arranged on the side wall of the displacement slider (23), a rotating disk (25) rotatably connected to the telescopic end of the electric telescopic rod (24), a slide rail (26) evenly arranged on the side wall of the rotating disk (25) in all directions, an electric slider (27) sliding on the slide rail (26), an adjusting member (28) arranged on the side of the electric slider (27) away from the slide rail (26), and a welding gun (29) arranged at one end of the adjusting member (28); the adjusting member (28) can adjust the welding angle of the welding gun (29), and can also reversely rotate the angle of the welding gun (29) to reduce welding wire tailing; and, The slow cooling unit (3) is arranged on one side of the adjusting member (28), and comprises a fixed plate (31), a fixed block (32) arranged on the side wall of the fixed plate (31), a telescopic cylinder (33) arranged at one end of the fixed block (32), a telescopic plate (34) arranged at the telescopic end of the telescopic cylinder (33), an arc track (35) symmetrically arranged in the telescopic plate (34), an electric arc block (36) sliding on the arc track (35), a heating plate (37) arranged on the side of the electric arc block (36) away from the arc track (35), and an electric heating wire (38) arranged on the side wall of the heating plate (37); one of the heating plates (37) covers the spot welding area, and the other heating plate (37) covers the tail of the continuous welding.

2. The aluminum alloy pipeline welding device according to claim 1 is characterized in that: A bearing plate (111) is also provided on the top of the bearing frame (11), and through grooves (112) are symmetrically provided in the radial direction of the top of the bearing plate (111), and one end of the lifting plate (14) away from the lifting platform (13) can penetrate the corresponding through groove (112).

3. The aluminum alloy pipeline welding device according to claim 2 is characterized in that: The lifting plate (14) is also provided with a placement groove (141) at one end away from the lifting platform (13); the placement groove (141) is arc-shaped; the pulleys (15) can be symmetrically distributed about the placement groove (141); and the two ends of the pulleys (15) can be rotatably connected to the corresponding inner wall of the lifting plate (14).

4. The aluminum alloy pipeline welding device according to claim 3 is characterized in that: A pressing groove (171) is provided on the side wall of the pressing plate (17), the pressing groove (171) is arc-shaped, and a rubber pad (172) is provided in the pressing groove (171).

5. The aluminum alloy pipeline welding device according to claim 1 is characterized in that: A long track (231) is provided on a side of the displacement slider (23) away from the electric telescopic rod (24); the displacement slider (23) can slide on the long track (231); and a side of the long track (231) away from the displacement slider (23) is connected to a side wall of the support frame (21); A long plate (211) is symmetrically arranged in the radial direction of the side wall of the support frame (21) close to the displacement cylinder (22), and both ends of the long plate (211) are rotatably connected to fixed pulleys (212). The outer ring of the rotating disk (25) can be rollingly connected with the fixed pulley (212), and a through hole (251) is opened in the middle of the rotating disk (25).

6. The aluminum alloy pipeline welding device according to claim 5 is characterized in that: The adjusting member (28) comprises an extension plate (281), an adjusting motor (282) arranged at one side of the extension plate (281), and an adjusting plate (283) arranged at an output end of the adjusting motor (282); One side of the extension plate (281) can be connected to a side wall of the electric slider (27) away from the slide rail (26); the adjustment motor (282) is located on a side of the extension plate (281) close to the electric slider (27); an output end of the adjustment motor (282) passes through the extension plate (281) and is connected to the adjustment plate (283); and the welding gun (29) is located at one end of the adjustment plate (283).

7. The aluminum alloy pipeline welding device according to claim 6 is characterized in that: An arc plate (284) is provided at one end of the adjustment plate (283) away from the welding gun (29), and an angle value (285) is provided on the arc plate (284). A directional arrow (286) is also provided on the side wall of the extension plate (281) close to the adjustment plate (283), and one end of the directional arrow (286) is located on the angle value (285).

8. The aluminum alloy pipeline welding device according to claim 1, characterized in that: A side of the fixed plate (31) away from the fixed block (32) is connected to a side wall of the rotating disk (25) close to the slide rail (26); a telescopic end of the telescopic cylinder (33) passes through the fixed block (32) and is connected to the telescopic plate (34); the telescopic plate (34) is arc-shaped; a cavity (341) is provided in the telescopic plate (34); and the cavity (341) can pass through both ends of the telescopic plate (34).

9. The aluminum alloy pipeline welding device according to claim 8, characterized in that: The arc-shaped tracks (35) are symmetrically distributed in the cavity (341); the heating plate (37) is arc-shaped; a heating groove (371) is provided on a side wall of the heating plate (37) close to the electric heating wire (38); an end face of the heating groove (371) is in an inverted U shape; and the electric heating wire (38) is located in the heating groove (371).

10. A method for welding an aluminum alloy pipeline, using the aluminum alloy pipeline welding device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The aluminum alloy pipe that has been spot-welded is placed on the carrier frame (11) so that the end spot-welded with the flange is close to the support frame (21). Then, the lifting cylinder (12) is started, and the telescopic end thereof pushes the lifting platform (13) to move upward, thereby causing the lifting plate (14) and the pulley (15) to move synchronously, and the aluminum alloy pipe is lifted so that the aluminum alloy pipe is at a height that is convenient for welding. S2. During the working process of S1, the pressing cylinder (16) is started at the same time, and its telescopic end pushes the pressing plate (17) to rotate along the side wall of the vertical block (18), so that the pressing plate (17) approaches the aluminum alloy pipe, presses the aluminum alloy pipe, and cooperates with the lifting plate (14) to fix and clamp the aluminum alloy pipe; S3. When welding the aluminum alloy pipe and the flange, on the one hand, the electric slider (27) is started, driving the adjustment member (28) and the welding gun (29) to slide along the opening direction of the slide rail (26), so that the welding gun (29) is close to the welding point between the aluminum alloy pipe and the flange, and welds the welding point to be welded; on the other hand, the displacement cylinder (22) is also started, and its telescopic end is extended, pushing the displacement slider (23) to slide, so that the electric telescopic rod (24) is also synchronously displaced, and the rotating disk (25) is pulled to rotate, so that the four welding guns (29) can continuously weld in the corresponding welding area, stop welding when approaching the spot welding area, and do not contact the four spot welding areas; S4. During the working process of S3, the electric telescopic rod (24) is started, and its telescopic end is extended or retracted with the rotation of the rotating disk (25) and the distance between the rotating disk (25) and the electric telescopic rod (24); the adjusting member (28) can adjust the welding angle of the welding gun (29) so that the welding gun (29) always maintains the best welding tilt angle, and can also reverse the angle of the welding gun (29) to reduce the tail of the welding wire at the end of welding; S5, after the preliminary welding is completed, the spot welding area is grinded by an angle grinder to remove impurities on the surface of the spot welding area. At this time, there is a gap between the spot welding area and the tail of the continuous welding. Then, the telescopic cylinder (33) is started to drive the telescopic plate (34) to approach the spot welding area and the tail of the continuous welding to cover the two areas. S6. During the working process of S5, the two electric arc blocks (36) are also started, driving the heating plate (37) and the electric heating wire (38) to slide along the opening direction of the arc track (35), so that the two heating plates (37) leave the inside of the telescopic plate (34) and gradually expand, so that one of the heating plates (37) covers the spot welding area and the other heating plate (37) covers the tail of the continuous welding, so that the corresponding electric heating wire (38) can achieve the purpose of heating and slowly cooling the corresponding area.

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