Multi-station automatic welding device for air conditioner copper pipe

Abstract

The invention relates to the technical field of copper pipe welding, in particular to an air conditioner copper pipe multi-station automatic welding device which comprises an operation table, a working plate is arranged on the upper portion of the operation table, a first welding station is arranged on one side of the working plate, and a second welding station is arranged on the other side of the working plate. A clamping device used for stabilizing a to-be-welded pipe is arranged on the side edge of the operation table, the first welding position and the second welding position are arranged on a moving path of the output end of the clamping device, the machining cost is saved, and efficient and high-quality copper pipe welding is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of copper pipe welding, and particularly relates to a multi-station automatic welding device for air conditioner copper pipes. Background Art

[0002] Copper pipes are one of the parts widely used in air conditioner production, mainly used for connecting pipelines in air conditioners. Refrigerant flows through the pipelines, and the sealing performance index is the most important quality index of copper pipe weldments. In the whole air conditioner production, copper pipes of various different specifications are needed, and copper pipes of various different specifications need to be used in combination. Therefore, it is necessary to cut and weld copper pipes so that copper pipes of different specifications can be suitable for the installation of air conditioners.

[0003] Since the structure of copper pipe weldments is relatively complex, a copper pipe weldment usually needs to be made by welding multiple parts. A common one is a three-way pipe, which needs to connect at least two branch pipes at one end of the three-way pipe. During processing, a hole is first enlarged at one end of the main pipe, and then formed by stamping from the middle, and a larger port is stamped into two smaller interfaces (as Figure 6 shown), then the branch pipes are inserted into the two ports, and then the inserted parts are welded. There are two common welding methods in the prior art. One is flame welding, where the welding rod is melted by the flame to fill the weld seam between the interfaces. The other is brazing. By pre-placing a filler at the welding position, and then using the eddy current generated by the coil to heat the workpiece and the filler. Since the melting point of the filler is relatively low, the filler can fill the gap at the joint, and welding is achieved after cooling. However, it is found in actual use that due to the small interval between the two branch pipes, if brazing is used, since the two fillers will be stacked in the middle position, there will be a large interval between the filler and the gap during welding, resulting in incomplete welding of one of the branch pipes. If flame welding is used, since it is necessary to go around two circumferences, a large amount of time will be consumed, and during the processing, since the branch pipes will be bent into different shapes, it is also necessary to fix the positions of the branch pipes during welding, resulting in high difficulty during welding. Therefore, it is necessary to solve the problem of slow welding between the narrow gaps of the two branch pipes. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiency of the large operation difficulty in welding two branch pipes of air conditioner copper pipes in the prior art, and provide a multi-station automatic welding device for air conditioner copper pipes.

[0005] In order to achieve the above purpose, the embodiments of the present invention specifically adopt the following technical solutions: A multi-station automatic welding device for air conditioner copper pipes, including an operation table. A working board is arranged on the upper part of the operation table. A first welding position is arranged on one side of the working board, and a second welding position is arranged on the other side of the working board. A clamping device for stabilizing the pipe to be welded is arranged on the side of the operation table. The first welding position and the second welding position are arranged on the moving path of the output end of the clamping device.

[0006] Further, the first welding position includes two support plates arranged on the working plate. Welding guns and a feeder are respectively arranged on the opposite surfaces of the support plates, and the output end of the feeder intersects with the extension line of the processing area of the welding gun.

[0007] Further, the feeder includes a feeding device arranged on the working plate. A discharge pipe is arranged at the front end of the feeding device, a chuck for guiding the welding rod is arranged at the end of the discharge pipe, a support pipe for supporting the welding rod is arranged at the tail of the feeding device. The feeding device includes a support wheel and a feeding wheel, a receiving groove is arranged on the side surface of the support wheel, and anti-slip ridges are arranged inside the receiving groove.

[0008] Further, a top plate is arranged above the working plate. An adjusting seat is movably arranged on the lower surface of the top plate. An adjusting rod is arranged at the lower part of the adjusting seat. The adjusting rod is a telescopic rod with damping. A baffle is arranged at the bottom of the adjusting rod, and a clamping plate matched with the baffle is arranged on one side surface of the baffle.

[0009] Further, the second welding position includes a welding cylinder arranged on the working plate, and a welding head of a brazing machine is arranged at the output end of the welding cylinder.

[0010] Further, the clamping device includes a base arranged on the side of the operating table. A support column is arranged at the upper part of the base. A rotating disk is arranged at the top of the support column, and a clamping part is arranged on the upper surface of the rotating disk.

[0011] Further, the clamping part includes a plurality of clamping cylinders arranged on the rotating disk. A clamping head for clamping the pipe to be welded is arranged at the output part of the clamping cylinder. A position sensor for detecting the position of the clamping cylinder is arranged on the upper surface of the operating table.

[0012] Further, a limiting rod for limiting the pipe to be welded is arranged at the front part of the clamping cylinder. The limiting rod is L-shaped. The upper part of the limiting rod passes through the front end of the clamping cylinder, and nuts for positioning are arranged on the upper and lower parts of the limiting rod.

[0013] The beneficial effects of the embodiments of the present invention are as follows: After the copper pipe and the branch pipe are positioned, they are rotated to the first welding position. The clamping plate and the baffle clamp and fix the position of the branch pipe, preventing large-angle movement of the copper pipe. The welding torch is first heated, and the heating time is set. Then the welding rod extends, and a solder joint is formed at the bottom of the branch pipe and the copper pipe. The position between the branch pipe and the copper pipe is determined, reducing the workload during flame welding, enabling welding at the narrow welding joint between the two branch pipes and the copper pipe, and fixing the position and angle of the branch pipe, facilitating further welding at the second welding position. Since only the part between the two branch pipes needs to be welded at the first welding position, compared with directly using a welding torch for welding, the welding area is smaller and the speed is faster;

[0014] When reaching the second welding position, the material clamping cylinder extends. First, the welding ring is sleeved onto the bottom of the branch pipe, and it is ensured that the notches of the welding rings are arranged opposite to each other. Then the welding cylinder extends, and the welding head accommodates the connection between the copper pipe and the branch pipe inside. The welding ring is welded to the gap by using eddy current induction. Since the welding rings do not overlap and are closer to the gap, the welding time is greatly reduced, the welding difficulty is lowered, the processing cost is saved, and efficient and high-quality copper pipe welding is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 is a schematic diagram of the overall structure of the present invention from another angle;

[0017] Figure 3 is a front view structure schematic diagram of the present invention;

[0018] Figure 4 is a schematic diagram of the back side structure of the working plate of the present invention;

[0019] Figure 5 is an enlarged structure schematic diagram of part A of the present invention;

[0020] Figure 6 is a schematic diagram of the position structure of the tee joint and the branch pipe to be welded in the present invention;

[0021] In the figure: 1, operating table; 2, working plate; 201, first welding position; 202, second welding position; 203, top plate; 204, welding cylinder; 205, welding head; 3, rotating disc; 301, material clamping cylinder; 302, clamping head; 303, limiting rod; 4, support rod; 401, welding torch; 402, support pipe; 403, adjusting seat; 404, adjusting rod; 405, baffle; 406, clamping plate; 407, discharge pipe; 408, support wheel; 409, feeding wheel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0023] Refer to Figures 1 to 5 , an automatic multi-station welding device for air-conditioning copper pipes according to an embodiment of the present invention mainly includes an operation table 1, a working plate 2 arranged on the operation table 1, a first welding position 201, a second welding position 202, a clamping device and related auxiliary mechanisms. The operation table 1 is arranged on the ground surface, and can be supported by floor bolts to facilitate the adjustment of the level of the entire platform, ensure the accuracy of the position of the copper pipe during welding, ensure that the welding rod can be inserted into the middle position at the bottom of the upper two branches of the copper pipe during welding, and ensure the stability during welding.

[0024] At the upper part of the operating table 1, there is a working plate 2 which is made of high-strength and high-temperature-resistant materials to withstand the high temperature and mechanical stress generated during the welding process. On one side of the working plate 2, there is a first welding position 201, and on the right side of the first welding position 201, there is a second welding position 202 to facilitate the selection of a suitable welding station according to different welding requirements. The first welding position 201 mainly includes two support plates 4 arranged on the working plate 2, and there is a certain distance between the support plates 4 to meet the space requirements during the welding of copper pipes. And at the bottom of the support plate 4, there is a bottom plate which is connected to the holes on the working plate 2 through bolts to facilitate the adjustment of the relative position between the two support plates 4. On the opposite sides of the support plates 4, there are respectively a welding torch 401 and a feeder. The output end of the feeder intersects with the extension line of the processing area of the welding torch 401 to ensure that the welding rod can be accurately fed between the bottoms of the two branch pipes at the upper part of the copper pipe during use. The welding torch 401 adopts a high-performance flame welding torch 401 with stable flame output and precise temperature control functions, which can meet the welding requirements of copper pipes of different specifications. The feeder includes a feeding device arranged on the support plate 4. At the front end of the feeding device, there is a discharge pipe 407. At the end of the discharge pipe 407, there is a chuck for guiding the welding rod. The welding rod used is a phosphor bronze welding rod. The discharge pipe 407 guides the welding rod, and the chuck at the end keeps the welding rod stable. The outlet of the chuck faces the connection between the copper pipe and the branch pipe to ensure that the welding rod can be accurately and stably fed into the welding area. At the tail of the feeding device, there is a support pipe 402 for supporting the welding rod to prevent the welding rod from bending or breaking during the feeding process. The support pipe 402 has a certain length, and the welding rod used in this embodiment is relatively long. Due to the material characteristics of the welding rod itself, it is not possible to design the welding rod into a coiled shape. It is not difficult to increase the length of the existing welding rod. To maintain the stability of the welding rod, the support pipe 402 and the discharge pipe 407 are on the same straight line to ensure stability during the transportation of the welding rod. On the working plate 2, there are support wheels 408 and feeding wheels 409. The support wheels 408 and the feeding wheels 409 are arranged between the discharge pipe 407 and the support pipe 402. And the feeding wheel 409 is connected to a feeding motor. The feeding wheel 409 abuts against the support wheel 408. On the conveying surface of the support wheel 408, there is a receiving groove, and anti-slip ridges are arranged inside the receiving groove. During use, the welding rod is placed inside the support pipe 402, and the end enters the receiving groove of the support wheel 408, and then is conveyed forward and enters the discharge pipe 407. The end of the welding rod protrudes from the chuck. The feeding motor is a stepping motor to improve the stability and accuracy of the welding rod feeding. During use, the welding joint between the copper pipe and the branch pipe is heated by the welding torch 401 and the welding rod. The welding rod is conveyed forward by the feeding motor, and the end of the welding rod enters between the two branch pipes, so that the narrow welding joint between the two branch pipes and the copper pipe is welded, and the position and angle of the branch pipe are fixed to facilitate the further welding of the second welding position 202. Since only the part between the two branch pipes needs to be welded at the first welding position 201,Compared with directly using the welding gun 401 for welding, the welded area is smaller and the speed is faster.

[0025] The second welding position 202 includes a welding cylinder 204 arranged on the working plate 2. The welding cylinder 204 is arranged on the back side of the working plate 2. The output end of the welding cylinder 204 is provided with a welding head 205 of a brazing machine. Different from the first welding position 201, the second welding position 202 uses brazing for welding. Since the first welding position 201 only spot-welds between the branch pipes and the copper pipes, and the welded part has a slightly higher height than the welded part between the copper pipe and the branch pipe, therefore, at the second welding position 202, first manually sleeved the welding ring used for brazing to the bottom of the branch pipe. The welding ring is set to be open and can be sleeved from the end of the branch pipe. The openings of the two welding rings are arranged oppositely, and the opening of the welding ring bypasses the protrusion welded at the first welding position 201, so that the welding ring acts on the welded part between the copper pipe and the branch pipe. Compared with directly using brazing welding in the prior art, it prevents the overlapping of the two welding rings, reduces the phenomenon of sand holes during welding, improves the welding quality during welding. Compared with single use of flame welding or brazing, it reduces the difficulty of manual operation, reduces the defect of unstable welding quality when using brazing, improves the product quality, and is suitable for occasions requiring higher welding precision and tightness. The welding cylinder 204 can be installed at different positions on the working plate 2 according to needs. There can be an interval of one to three workpieces between the first welding position 201 and the second welding position 202, which is convenient for the operator to install the welding ring to the bottom of the branch pipe, provides operation time, and ensures the welding quality.

[0026] Above the working plate 2, a top plate 203 is arranged. The top plate 203 uses a magnetic conductive material. The lower surface of the top plate 203 is movably provided with an adjusting seat 403. The adjusting seat 403 has magnetism inside and can be adjusted arbitrarily according to needs. The lower part of the adjusting seat 403 is provided with an adjusting rod 404. The adjusting rod 404 is a telescopic rod with damping and can adjust the height according to needs. The bottom of the adjusting rod 404 is provided with a baffle 405. One side of the baffle 405 is provided with a clamping plate 406 that cooperates with it. The bottom of the clamping plate 406 is hinged to the bottom of the baffle 405, and an effective motor is arranged at the hinge. During welding, it cooperates with the baffle 405 to clamp the branch pipe. When in use, the clamping cylinder 301 clamps the copper pipe, then installs the branch pipe to the connection processed at the top of the copper pipe, and adjusts the relative position between the branch pipes. When the clamping cylinder 301 moves the placed branch pipe to the first welding position 201, the clamping plate 406 closes, and the upper part of the branch pipe is clamped between the baffle 405 for auxiliary positioning and support of the copper pipe during the welding process, preventing the copper pipe from moving or deforming during the welding process, facilitating the formation of a welding point between the two branch pipes by the welding rod, improving the operation effect, and ensuring the processing quality.

[0027] The clamping device is arranged on the side of the operating table 1 and is used to stabilize the copper pipe to be welded. The clamping device includes a base arranged on the side of the operating table 1. A support column is arranged on the upper part of the base, and a rotating disk 3 is arranged on the top of the support column. A clamping part is arranged on the upper surface of the rotating disk 3, and a motor is arranged at the bottom of the rotating disk 3 to push the rotating disk 3 to rotate directionally. The clamping part includes a plurality of clamping cylinders 301 arranged on the rotating disk 3. A clamping head 302 for clamping the copper pipe to be welded is arranged at the output part of the clamping cylinder 301. The clamping head 302 is made of high-strength and wear-resistant materials, and a groove for accommodating the copper pipe is arranged on the opposite surface of the clamping head 302, which is convenient for clamping the copper pipe from below and can ensure stable and reliable clamping of the copper pipe during the welding process. A position sensor for detecting the position of the clamping cylinder 301 is arranged on the upper surface of the operating table 1, which can monitor the position and state of the clamping cylinder 301 in real time to ensure the accuracy and safety of the welding process.

[0028] A limiting rod 303 for limiting the copper pipe to be welded is arranged at the front part of the clamping cylinder 301. The limiting rod 303 is L-shaped. Its upper part passes through the front end of the clamping cylinder 301 and is positioned by a nut. A circular base is arranged at the bottom of the limiting rod 303. The base is below the clamping head 302 to support the copper pipe. The limiting rod 303 limits the movement range of the copper pipe during the welding process to prevent the copper pipe from shifting or falling off. It should be noted that when placing the copper pipe, one end of the connecting branch pipe needs to be set upward, and a marking point is arranged on the limiting rod 303 so that the installation positions of the two branch pipes are on the same straight line as the marking point, which is convenient for matching the welding position requirements of the first welding position 201, ensuring the welding quality and improving the use effect.

[0029] During actual use, first place the copper pipe to be welded on the clamping device and stably clamp it through the clamping head 302 and the limiting rod 303. Then install the two branch pipes into the holes machined on the upper part of the copper pipe. Since the inside of the copper pipe is a shrinkage hole, there is a certain frictional force when the branch pipes are installed at the top of the copper pipe, preventing the branch pipes from sliding down and ensuring the stable position of the branch pipes. Correspondingly, according to the angle between the finished branch pipes, adjust the position of the adjusting rod 404 and the height of the baffle 405 so that the two baffles 405 can abut against the upper parts of the two branch pipes to ensure batch processing. Then rotate the turntable 3. After clamping the copper pipe and the branch pipes and determining their positions, rotate them to the first welding position 201. The clamping plate 406 and the baffle 405 clamp and fix the position of the branch pipes to prevent large-angle movement of the copper pipe. The clamping cylinder 301 contracts and extends when reaching the first welding position 201, avoiding the influence of the support plate 4. After the clamping cylinder 301 extends and clamps the branch pipes, the welding gun 401 first heats up, sets the heating time, and then the welding rod extends to form a welding point at the bottom of the branch pipe and the copper pipe. Then the clamping cylinder 301 contracts and the turntable 3 rotates. When reaching the second welding position 202, the clamping cylinder 301 extends. First, slip the welding ring onto the bottom of the branch pipe and ensure that the notches of the welding rings are arranged opposite to each other. Then the welding cylinder 204 extends, and the welding head 205 accommodates the connection between the copper pipe and the branch pipe inside, and uses eddy current induction to weld the welding ring to the gap. Since the welding rings do not overlap and are closer to the gap, the welding time is greatly reduced and the welding difficulty is lowered. After the turntable 3 finishes welding, it rotates a certain angle, and then releases the welded workpiece. During the processing, one skilled worker can operate, reducing the labor, saving the processing cost, realizing efficient and high-quality copper pipe welding, improving the production efficiency, lowering the production cost, being convenient to operate, having a low maintenance cost, and having a wide application prospect.

[0030] It should be noted that in the description of the present invention, the terms indicating directions or position relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or position relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device comprising a series of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to these process, article, or apparatus / device.

[0033] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An automatic multi-station welding device for air-conditioning copper tubes, comprising an operating table, characterized in that: A working plate is provided on the upper part of the operation table. A first welding position is provided on one side of the working plate, and a second welding position is provided on the other side of the working plate. A clamping device for stabilizing the pipe to be welded is provided on the side of the operation table. The first welding position and the second welding position are arranged on the moving path of the output end of the clamping device.

2. The multi-station automatic welding device for air-conditioning copper pipes according to claim 1, wherein: The first welding position includes two support plates arranged on the working plate. A welding gun and a feeder are respectively arranged on the opposite surfaces of the support plates. The output end of the feeder intersects with the extension line of the processing area of the welding gun.

3. The multi-station automatic welding device for air-conditioning copper pipes according to claim 2, wherein: The feeder includes a feeding device arranged on the working plate. A discharge pipe is arranged at the front end of the feeding device. A chuck for guiding the welding rod is arranged at the end of the discharge pipe. A support pipe for supporting the welding rod is arranged at the tail of the feeding device. The feeding device includes a support wheel and a feeding wheel. A receiving groove is arranged on the side surface of the support wheel, and anti-slip ribs are arranged inside the receiving groove.

4. The multi-station automatic welding device for air-conditioning copper pipes according to claim 1, characterized in that: A top plate is arranged above the working plate. An adjusting seat is movably arranged on the lower surface of the top plate. An adjusting rod is arranged at the lower part of the adjusting seat. The adjusting rod is a telescopic rod with a damper. A baffle is arranged at the bottom of the adjusting rod. A clamping plate cooperating with it is arranged on one side surface of the baffle.

5. The multi-station automatic welding device for air-conditioning copper pipes according to claim 1, wherein: The second welding position includes a welding cylinder arranged on the working plate. The output end of the welding cylinder is provided with a welding head of a brazing machine.

6. The multi-station automatic welding device for air-conditioning copper tubes according to claim 1, wherein: The clamping device includes a base arranged on the side of the operation table. A support column is arranged on the upper part of the base. A rotating disk is arranged at the top of the support column. A clamping part is arranged on the upper surface of the rotating disk.

7. The multi-station automatic welding device for air-conditioning copper tubes according to claim 6, wherein: The clamping part includes a plurality of clamping cylinders arranged on the rotating disk. A clamping head for clamping the pipe to be welded is arranged at the output part of the clamping cylinder. A position sensor for detecting the position of the clamping cylinder is arranged on the upper surface of the operation table.

8. The multi-station automatic welding device for air-conditioning copper tubes according to claim 7, wherein: A limiting rod for limiting the pipe to be welded is arranged at the front part of the clamping cylinder. The limiting rod is L-shaped. The upper part of the limiting rod passes through the front end of the clamping cylinder. Nuts for positioning are arranged on the upper and lower parts of the limiting rod.

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