Mechanical engineering thin-walled tube automatic welding device and using method thereof

Abstract

The invention provides a mechanical engineering thin-walled tube automatic welding device and a using method thereof, and relates to the technical field of thin-walled tube welding machining. The mechanical engineering thin-walled tube automatic welding device comprises a bottom frame, a left hexagonal frame and a right hexagonal frame are fixed to the upper portion of the bottom frame, a left tube body and a right tube body are arranged in the left hexagonal frame and the right hexagonal frame respectively, and butt joint structures used for connecting the left tube body and the right tube body are arranged on the hexagonal frames. Bearing structures used for supporting the welding position are arranged in the left pipe body and the right pipe body. According to the mechanical engineering thin-walled pipe automatic welding device and the using method thereof, the left pipe body and the right pipe body are placed in the left hexagonal frame and the right hexagonal frame correspondingly, the left pipe body and the right pipe body can rotate and be automatically welded through the butt joint structure, and the left pipe body and the right pipe body can be supported through the bearing structure to be tightly attached; therefore, the welding quality of the thin-walled tube is improved.

Description

Technical Field

[0001] This invention relates to the field of thin-walled tube welding technology, specifically to an automatic welding device for thin-walled tubes in mechanical engineering and its usage method. Background Technology

[0002] Thin-walled tubes are made by piercing steel ingots or solid tube blanks to form rough tubes, and then hot-rolling, cold-rolling or cold-drawing them. Thin-walled tubes have an important position in my country's steel pipe industry. In the field of machinery manufacturing, thin-walled steel tubes are widely used in the manufacturing and assembly of various mechanical equipment. Due to their low processing cost, high strength and ease of processing into various shapes, they are suitable for automobiles, ships, aerospace and other fields. Application number CN202010335752.9 discloses an automatic welding device for nano-thin-walled pipe fittings, including a base, a lifting plate on the top of the base, a support conveying mechanism at both ends of the top of the lifting plate, a first hydraulic cylinder fixedly installed between the lifting plate and the base, a welding machine on the top of the base, a second hydraulic cylinder fixedly installed at the bottom of the welding machine, a welding torch fixedly connected to the bottom end of the second hydraulic cylinder, and a support conveying mechanism including a support seat rotatably connected to the top of the lifting plate, with gear teeth provided on the circumferential side of the bottom end of the support seat; In the aforementioned patented structure, the lateral movement and rotation of the thin-walled tubes are mainly achieved through a support and conveying mechanism during the welding process of the two sets of thin-walled tubes. However, the process of lateral movement and rotation adjustment of the thin-walled tubes is relatively complicated, making it inconvenient to directly rotate the thin-walled tubes axially or circumferentially. Therefore, it is inconvenient to quickly move and rotate the thin-walled tubes laterally, resulting in low efficiency. In addition, the aforementioned patented structure only uses the lower support roller and the upper pressure roller to support and fix the thin-walled tubes during the welding process of the two sets of thin-walled tubes. This makes it difficult to ensure that the weld joints of the two sets of thin-walled tubes are axially tightly fitted. Furthermore, because the thin-walled tubes have low strength, they are only supported from the outside, making it inconvenient to support them from the inside. This can easily damage the tubes or even the thin-walled tubes themselves. Summary of the Invention

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an automatic welding device for thin-walled tubes in mechanical engineering and its usage method. It solves the problems of inconvenience in directly rotating and adjusting the thin-walled tube in the axial or circumferential direction, inconvenience in supporting it from the inside, and inconvenience in ensuring that the weld joints of two sets of thin-walled tubes are axially tightly fitted during the welding process.

[0004] (2) Technical solution To achieve the above objectives during the welding process of thin-walled tubes, such as facilitating direct axial or circumferential rotation adjustment of the thin-walled tubes, facilitating support from the inside of the thin-walled tubes, and facilitating axial tight fit at the weld joint of two sets of thin-walled tubes, the present invention provides the following technical solution: an automatic welding device for thin-walled tubes in mechanical engineering, comprising a base frame, with two hexagonal frames fixed on the top of the base frame, and a left tube body and a right tube body respectively disposed inside the two hexagonal frames. The hexagonal frames are provided with a butt joint structure for connecting the left tube body and the right tube body, and the left tube body and the right tube body are provided with a support structure for supporting the weld joint. The base frame includes a V-shaped frame, which is fixed at both ends of the base frame. Guide wheels rotate on the V-shaped frame. A linear frame is fixed between the two hexagonal frames on the left and right. A welding machine is fixed on the upper surface of the linear frame. A welding electric rod is fixed on the bottom surface of the linear frame. A welding gun is fixed at the bottom end of the welding electric rod. An adjusting motor is fixed on the inner side of the base frame. A lead screw is fixed at the output end of the adjusting motor. A guide rail is fixed on the outer side of the base frame. A guide groove is opened inside the guide rail. A telescopic slide rod slides inside the guide groove. The lead screw passes through the telescopic slide rod and is threaded to it. An adjusting electric rod is fixed on the telescopic slide rod.

[0005] Preferably, the docking structure includes a docking electric rod, which is fixed to the outside of the hexagonal frame. A linkage frame is fixed to the output end of the docking electric rod. A first steering motor is fixed to one side of the linkage frame, and a second steering motor is fixed to the other side of the linkage frame. Two sets of meshing semi-tooth discs are fixed to the output ends of both the first and second steering motors. A first axial swing arm and a second axial swing arm are axially arranged on the left and right tubes. A first radial swing arm and a second radial swing arm are radially arranged on the left and right tubes. A U-shaped frame is fixed to the ends of the first and second axial swing arms and the first and second radial swing arms. A drive motor is fixed to one side of the U-shaped frame, and a control power supply is fixed to the other side of the U-shaped frame. An axial roller is fixed to the output end of the drive motor on one side of the first and second axial swing arms, and a radial roller is fixed to the output end of the drive motor on one side of the first and second radial swing arms. Pressure sensors are fixed to both the axial and radial rollers.

[0006] Preferably, the No. 1 steering motor and the No. 2 steering motor are located on both sides of the linkage frame, and the output ends of the No. 1 steering motor and the No. 2 steering motor are fixedly connected to the half-tooth disc on their respective sides.

[0007] Preferably, the first axial rocker arm and the second axial rocker arm are fixedly connected to two sets of axially arranged half-tooth discs, and the first radial rocker arm and the second radial rocker arm are fixedly connected to two sets of radially arranged half-tooth discs.

[0008] Preferably, conductive rollers are fixed to the side of the axial roller and radial roller near the control power supply, and conductive brushes are fixed to the control power supply, with the conductive rollers and conductive brushes being rotatably connected.

[0009] Preferably, the supporting structure includes a three-head frame, which is fixed to an adjusting electric rod. A storage tank is fixed to the end face of the three-head frame, and a pump body is fixed to one outer end of the three-head frame. A guide tube is fixed to the pump body, and a fixed cylinder is fixed between the guide tubes. A volute-shaped metal rubber sheet is fixed to the surface of the fixed cylinder, and a volute-shaped cavity is formed inside the volute-shaped metal rubber sheet.

[0010] Preferably, the storage tank is filled with coolant, and the storage tank is connected to the pump body via a connecting pipe.

[0011] Preferably, the pump body, conduit, fixed cylinder, and spiral cavity are interconnected.

[0012] Preferably, three sets of the volute-shaped metal rubber sheets are equidistantly arranged along the circumference of the left and right tubes. The volute-shaped metal rubber sheets are volute-shaped, with one inner end of the volute-shaped metal rubber sheet fixedly connected to the fixed cylinder, and one outer end of the volute-shaped metal rubber sheet in contact with the inner wall of the left and right tubes.

[0013] A method for using an automatic welding device for thin-walled tubes in mechanical engineering includes the following steps: The first step involves placing the left tube on the guide wheel from the left end and the right tube on the guide wheel from the right end, and then simultaneously pushing the left and right tubes inward to bring them into contact. This ensures that the welding point of the left and right tubes is directly below the welding torch, allowing for subsequent automatic welding of the left and right tubes. The second step is to start the No. 1 steering motor and the No. 2 steering motor to rotate in opposite directions. Through the meshing of two sets of half-tooth discs, the No. 1 radial swing arm and the No. 2 radial swing arm can rotate inward in opposite directions synchronously. Thus, the No. 1 radial swing arm and the No. 2 radial swing arm can drive the radial roller to contact the left tube body and the right tube body through the U-shaped frame. Then, the drive motor is started to drive the radial roller to rotate. In turn, the radial roller can drive the left tube body and the right tube body to rotate intermittently in the same direction at the same time, so that the left tube body and the right tube body can be welded in the circumferential direction later. The third step involves intermittent rotation of the left and right pipe bodies, meaning that the left and right pipe bodies alternate between being stationary and rotating. The welding machine and welding electric rod are then activated. The welding electric rod moves the welding torch to the connection point of the left and right pipe bodies. When the left and right pipe bodies are stationary, the welding torch automatically welds them. When the left and right pipe bodies rotate, the welding torch stops welding. First, spot welding is performed along the circumference of the left and right pipe bodies, and then continuous welding is performed along the circumference of the left and right pipe bodies. During the spot welding of the left and right pipe bodies, the stationary and rotating states alternate. During the continuous welding of the left and right pipe bodies, the left and right pipe bodies rotate continuously, thus ensuring a more secure weld between them. Fourthly, during the spot welding of the left and right pipe bodies, the pump is started when the left and right pipe bodies are stationary and shut off when they rotate. Starting the pump allows the coolant inside the storage tank to be delivered to the volute cavity through the conduit and fixed cylinder. As the pressure inside the volute cavity increases, the volute metal rubber sheet deforms, causing one outer end to unfold outward and contact the inner wall of the left and right pipe bodies. Therefore, through the friction between the volute metal rubber sheet and the left and right pipe bodies, the volute metal rubber sheets on both sides tend to push the left and right pipe bodies inward in opposite directions, ensuring a tight fit at the connection point and providing support from the inside for the welded joint.

[0014] (III) Beneficial Effects This invention provides an automatic welding device for thin-walled tubes in mechanical engineering and its method of use. It has the following beneficial effects: 1. The first and second axial swing arms can drive the axial rollers to contact the left and right pipe bodies. When the drive motor is started, it drives the axial rollers on one side of the left and right pipe bodies to rotate in opposite directions. Therefore, it can drive the left and right pipe bodies to move in opposite directions, so that the connection point of the left and right pipe bodies is directly below the welding torch. Thus, the left and right pipe bodies can be connected. The first and second radial swing arms can make the radial rollers contact the left and right pipe bodies. When the drive motor is started, it drives the radial rollers to rotate intermittently. In turn, the radial rollers can drive the left and right pipe bodies to rotate simultaneously in the same direction. Therefore, it can quickly move the left and right pipe bodies axially and rotate circumferentially.

[0015] 2. When the pump is started, the coolant inside the storage tank is delivered to the volute cavity through the conduit and the fixed cylinder. This increases the pressure inside the volute cavity and causes the volute metal rubber sheet to deform and unfold. The outer part of the volute metal rubber sheet contacts the inner walls of the left and right pipes. Through the friction between the volute metal rubber sheet and the inner walls of the left and right pipes, the volute metal rubber sheets on both sides exert an inward and opposite pushing force, allowing the left and right pipes to fit together axially in opposite directions. At the same time, the volute metal rubber sheet also supports the welded joint of the left and right pipes from the inside out. Furthermore, the volute metal rubber sheet and the internal coolant rapidly cool and solidify the welded joint of the left and right pipes.

[0016] 3. After the welding of the left and right pipe bodies is completed, start the No. 1 and No. 2 steering motors on one side of the No. 1 and No. 2 axial swing arms. This will cause the No. 1 and No. 2 axial swing arms to drive the axial rollers to contact the left and right pipe bodies. Then, rotate the No. 1 and No. 2 radial swing arms in opposite directions, causing the radial rollers to disengage from the left and right pipe bodies. Start the drive motor and drive the axial rollers to rotate. In this way, the axial rollers can drive the welded left and right pipe bodies to move to the left or right, and remove the welded left and right pipe bodies, thus completing the automatic welding of the two thin-walled pipe sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a diagram showing the combination of the axial roller and the radial roller in the structure of this invention; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of a portion of the structure at point A; Figure 4 This is a combined diagram of the first and second radial swing arms of the present invention. Figure 5 This is a schematic diagram of the first radial swing arm and the second radial swing arm of the present invention; Figure 6 This is a schematic diagram of the spiral-shaped metal rubber sheet structure of the present invention; Figure 7 This is a main sectional view of the left and right tubes of the structure of this invention; Figure 8 For the present invention Figure 7 A magnified view of the structure at point B in the middle.

[0018] The components include: 1. Base frame; 101. V-shaped frame; 102. Guide wheel; 103. Linear frame; 104. Welding machine; 105. Welding electric rod; 106. Welding torch; 107. Adjusting motor; 108. Lead screw; 109. Guide rail; 110. Guide groove; 111. Telescopic slide rod; 112. Adjusting electric rod; 2. Hexagonal frame; 3. Left tube body; 4. Right tube body; 5. Docking structure; 501. Docking electric rod; 502. Linkage frame; 503. No. 1 steering motor; 504. No. 2 steering motor; 505. Half-tooth disc; 506. Axial swing arm No. 1; 507. Axial swing arm No. 2; 508. Radial swing arm No. 1; 509. Radial swing arm No. 2; 510. U-shaped frame; 511. Drive motor; 512. Control power supply; 513. Axial roller; 514. Radial roller; 515. Pressure sensor; 6. Support structure; 601. Three-head frame; 602. Storage tank; 603. Pump body; 604. Pipe; 605. Fixed cylinder; 606. Volute-shaped metal rubber sheet; 607. Volute-shaped cavity. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0020] Please see Figures 1-8 The present invention provides a technical solution: an automatic welding device for thin-walled tubes in mechanical engineering, including a base frame 1, two hexagonal frames 2 fixed on the top of the base frame 1, a left tube body 3 and a right tube body 4 respectively arranged inside the two hexagonal frames 2, a docking structure 5 for connecting the left tube body 3 and the right tube body 4 is provided on the hexagonal frames 2, and a support structure 6 for supporting the welding joint is provided inside the left tube body 3 and the right tube body 4. The base frame 1 includes a V-shaped frame 101, which is fixed at both ends of the base frame 1. Guide wheels 102 rotate on the V-shaped frame 101. A linear frame 103 is fixed between the two hexagonal frames 2. A welding machine 104 is fixed to the upper surface of the linear frame 103. A welding electric rod 105 is fixed to the bottom surface of the linear frame 103. A welding torch 106 is fixed to the bottom end of the welding electric rod 105. An adjusting motor 107 is fixed to the inner side of the base frame 1. A lead screw 108 is fixed to the output end of the adjusting motor 107. A guide rail 109 is fixed to the outer side of the base frame 1. A guide groove 110 is formed inside the guide rail 109. A telescopic slide rod 111 slides inside the guide groove 110, and the lead screw 108 passes through the telescopic slide rod 111 and is threadedly connected to it. An adjusting electric rod 112 is fixed to the telescopic slide rod 111. When the... After the left tube 3 and the right tube 4 are connected, the height of the telescopic slide rod 111 is adjusted so that the tripod 601 is aligned with the center of the left tube 3 and the right tube 4. The telescopic slide rod 111 is then fixed in place by bolts and is no longer extended or retracted. Then, the adjusting motor 107 is started to drive the lead screw 108 to rotate. The lead screw 108, through the telescopic slide rod 111, can drive the adjusting electric rod 112 to move inward. In turn, the adjusting electric rod 112 can drive the tripod 601 to move inside the left tube 3 and the right tube 4. Finally, the tripod 601 is adjusted again by the adjusting electric rod 112 so that the volute metal rubber sheet 606 moves to the connection point of the left tube 3 and the right tube 4 so that the volute metal rubber sheet 606 can support the welded joint of the left tube 3 and the right tube 4 from the inside.

[0021] In this embodiment, the docking structure 5 includes a docking electric rod 501, which is fixed to the outside of the hexagonal frame 2. A linkage frame 502 is fixed to the output end of the docking electric rod 501. A first steering motor 503 is fixed to one side of the linkage frame 502, and a second steering motor 504 is fixed to the other side of the linkage frame 502. Two sets of meshing semi-tooth discs 505 are fixed to the output ends of both the first steering motor 503 and the second steering motor 504. A first axial swing arm 506 and a second axial swing arm 507 are arranged axially on the left tube 3 and the right tube 4, and a first radial swing arm 508 and a second radial swing arm 507 are arranged radially on the left tube 3 and the right tube 4. U-shaped frames 510 are fixed to the ends of the first axial swing arm 506, the second axial swing arm 507, the first radial swing arm 508, and the second radial swing arm 509. A drive motor 511 is fixed to one side of the U-shaped frame 510, and a control power supply 512 is fixed to the other side of the U-shaped frame 510. An axial roller 513 is fixed to the output end of the drive motor 511 on one side of the first axial swing arm 506 and the second axial swing arm 507. A radial roller 514 is fixed to the output end of the drive motor 511 on one side of the first radial swing arm 508 and the second radial swing arm 509. A pressure sensor 515 is fixed to both the axial roller 513 and the radial roller 514. Specifically, see the instruction manual. Figure 4 and instruction manual Figure 5 As shown, the electric rod 501 can drive the linkage frame 502 to move, and adjust the distance between the first axial swing arm 506, the second axial swing arm 507, the first radial swing arm 508, and the second radial swing arm 509 and the positions of the left tube 3 and the right tube 4. The first steering motor 503 and the second steering motor 504 on one side of the first axial swing arm 506 and the second axial swing arm 507 are activated. The first steering motor 503 and the second steering motor 504, through two sets of meshing semi-gear discs 505, can drive the first axial swing arm 506 and the second axial swing arm 507 to rotate inwards and in opposite directions simultaneously. The first axial swing arm 506 and the second axial swing arm 507 are connected by a U-shaped frame 5. 10 can drive the axial roller 513 to contact the left tube 3 and the right tube 4. Start the drive motor 511 to drive the axial roller 513 to rotate in the opposite direction. Therefore, the axial roller 513 can drive the left tube 3 and the right tube 4 to move in the opposite direction axially. Similarly, start the first steering motor 503 and the second steering motor 504 on one side of the first radial swing arm 508 and the second radial swing arm 509. The first radial swing arm 508 and the second radial swing arm 509 rotate inward and in the opposite direction at the same time, and make the radial roller 514 contact the left tube 3 and the right tube 4. Start the drive motor 511 to drive the radial roller 514 to rotate. Therefore, the radial roller 514 can drive the left tube 3 and the right tube 4 to rotate.

[0022] In this embodiment, the first steering motor 503 and the second steering motor 504 are located on both sides of the linkage frame 502, and the output ends of the first steering motor 503 and the second steering motor 504 are fixedly connected to the half-tooth disk 505 on their respective sides. Specifically, see the instruction manual. Figure 4 As shown, the first steering motor 503 and the second steering motor 504 can drive the two sets of meshing half-tooth discs 505 to rotate in opposite directions simultaneously, so that the two sets of meshing half-tooth discs 505 can drive the first axial rocker arm 506 and the second axial rocker arm 507 or the first radial rocker arm 508 and the second radial rocker arm 509 to rotate in opposite directions.

[0023] In this embodiment, the first axial rocker arm 506 and the second axial rocker arm 507 are respectively fixedly connected to two sets of axially arranged half-tooth disks 505, and the first radial rocker arm 508 and the second radial rocker arm 509 are respectively fixedly connected to two sets of radially arranged half-tooth disks 505. Specifically, see the instruction manual. Figure 2As shown, the first axial swing arm 506 and the second axial swing arm 507 can support the left tube 3 and the right tube 4 through the axial roller 513, enabling the left tube 3 and the right tube 4 to move axially. The first radial swing arm 508 and the second radial swing arm 509 can support the left tube 3 and the right tube 4 through the radial roller 514, enabling the left tube 3 and the right tube 4 to rotate circumferentially.

[0024] In this embodiment, conductive rollers are fixed on the side of the axial roller 513 and the radial roller 514 near the control power supply 512, and conductive brushes are fixed on the control power supply 512, and the conductive rollers and conductive brushes are rotatably connected. Specifically, see the instruction manual. Figure 5 As shown, electrical energy is transferred between the conductive roller and the conductive brush through friction, which facilitates the control power supply 512 to power the drive motor 511 and the pressure sensor 515. The drive motor 511 will not interfere with the control power supply 512 when rotating. The pressure sensor 515 is a common type of sensor used to convert pressure signals into electrical signals. Its working principle is based on detecting changes in the physical properties of materials. When subjected to pressure, the resistance value of the strain gauge changes. This change can be converted into a voltage signal by a measuring circuit, thereby achieving pressure measurement. The pressure sensor 515 transmits the detected information to the first steering motor 503 and the second steering motor 504, enabling the first steering motor 503 and the second steering motor 504 to accurately control the rotation angles of the first axial swing arm 506 and the second axial swing arm 507, as well as the first radial swing arm 508 and the second radial swing arm 509. This avoids excessive compression and damage to the axial roller 513 and the radial roller 514 after they come into contact with the left tube 3 and the right tube 4.

[0025] In this embodiment, the supporting structure 6 includes a three-head frame 601, which is fixed on the adjusting electric rod 112. A storage tank 602 is fixed on the end face of the three-head frame 601. A pump body 603 is fixed on one outer end of the three-head frame 601. A conduit 604 is fixed on the pump body 603. A fixed cylinder 605 is fixed between the conduits 604. A volute-shaped metal rubber sheet 606 is fixed on the surface of the fixed cylinder 605. A volute-shaped cavity 607 is opened inside the volute-shaped metal rubber sheet 606. Specifically, see the instruction manual. Figure 8As shown, starting the pump body 603 can transport the coolant inside the storage tank 602 to the volute cavity 607 through the conduit 604 and the fixed cylinder 605. When the pressure inside the volute cavity 607 increases, the volute metal rubber sheet 606 deforms, causing one outer end of the volute metal rubber sheet 606 to unfold outward and contact the inner walls of the left tube 3 and the right tube 4. Therefore, through the friction between the volute metal rubber sheet 606 and the left tube 3 and the right tube 4, the volute metal rubber sheets 606 on both sides can exert an inward and reverse pushing force on the left tube 3 and the right tube 4, which can make the left tube 3 and the right tube 4 stick together tightly.

[0026] In this embodiment, the storage tank 602 is filled with coolant, and the storage tank 602 is connected to the pump body 603 through a connecting pipe; Specifically, see the instruction manual. Figure 6 As shown, the pump body 603 can transport the coolant inside the storage tank 602 to the volute cavity 607 through the conduit 604 and the fixed cylinder 605. When the pressure inside the volute cavity 607 increases, the volute metal rubber sheet 606 deforms, and the volute metal rubber sheet 606 and the coolant inside can quickly cool and solidify the weld between the left tube body 3 and the right tube body 4.

[0027] In this embodiment, the pump body 603, the conduit 604, the fixed cylinder 605, and the volute cavity 607 are interconnected. Specifically, see the instruction manual. Figure 7 As shown, the coolant can flow between the storage tank 602 and the volute cavity 607 through the pump body 603, the conduit 604 and the fixed cylinder 605. The external controller is electrically connected to the welding machine 104, the welding electric rod 105, the adjusting motor 107, the adjusting electric rod 112, the docking electric rod 501, the first steering motor 503, the second steering motor 504, the drive motor 511, the control power supply 512, the pressure sensor 515 and the pump body 603 through wires, so that the external controller can work individually or in combination with each structure.

[0028] In this embodiment, three sets of volute-shaped metal rubber sheets 606 are equidistantly arranged along the circumferential direction of the left tube 3 and the right tube 4. The volute-shaped metal rubber sheets 606 are volute-shaped. One inner end of the volute-shaped metal rubber sheet 606 is fixedly connected to the fixed cylinder 605, and one outer end of the volute-shaped metal rubber sheet 606 is in contact with the inner wall of the left tube 3 and the right tube 4. Specifically, see the instruction manual. Figure 6As shown, the volute-shaped metal rubber sheet 606 is arc-shaped and fits along the arc direction of the left tube 3 and right tube 4. This increases the contact area between the volute-shaped metal rubber sheet 606 and the left tube 3 and right tube 4, increases the friction between the volute-shaped metal rubber sheet 606 and the left tube 3 and right tube 4, and improves the cooling effect of the volute-shaped metal rubber sheet 606 and the internal coolant on the left tube 3 and right tube 4. The volute-shaped metal rubber sheet 606 is a composite material composed of metal wire and rubber. Its appearance and feel are similar to natural rubber. It has unique performance characteristics and application fields. It can be used for a long time in the range of -40℃ to 350℃. It has long-term resistance to high and low temperatures, good electrical insulation properties and high temperature resistance. At the same time, it has good thermal conductivity, which can effectively transfer heat. It also has high strength and rigidity, which can withstand large loads and maintain structural stability. It has good wear resistance and can resist friction and wear. It is suitable for occasions that need to withstand friction and wear. The metal rubber material combines the advantages of metal and rubber and has unique fatigue resistance.

[0029] A method for using an automatic welding device for thin-walled tubes in mechanical engineering includes the following steps: The first step involves placing the left tube 3 on the guide wheel 102 from the left end and the right tube 4 on the guide wheel 102 from the right end. Then, the left tube 3 and the right tube 4 are pushed inward simultaneously to bring them into contact, so that the welding point of the left tube 3 and the right tube 4 is located directly below the welding torch 106, so that the left tube 3 and the right tube 4 can be automatically welded in the future. The second step involves starting the No. 1 steering motor 503 and the No. 2 steering motor 504 to rotate in opposite directions. Through the meshing of two sets of half-tooth discs 505, the No. 1 radial swing arm 508 and the No. 2 radial swing arm 509 can rotate inward in opposite directions synchronously. Thus, the No. 1 radial swing arm 508 and the No. 2 radial swing arm 509 can drive the radial roller 514 to contact the left tube 3 and the right tube 4 through the U-shaped frame 510. Then, the drive motor 511 is started to drive the radial roller 514 to rotate. In turn, the radial roller 514 can simultaneously drive the left tube 3 and the right tube 4 to rotate intermittently in the same direction, so that the left tube 3 and the right tube 4 can be welded in the circumferential direction later. The third step involves intermittent rotation of the left pipe body 3 and the right pipe body 4, that is, alternating periods of stillness and rotation between the left pipe body 3 and the right pipe body 4. The welding machine 104 and the welding electric rod 105 are then activated. The welding electric rod 105 moves the welding torch 106 to the connection point of the left pipe body 3 and the right pipe body 4. When the left pipe body 3 and the right pipe body 4 are still, the welding torch 106 automatically welds them. When the left pipe body 3 and the right pipe body 4 rotate, the welding torch 106 stops welding. First, spot welding is performed along the circumference of the left pipe body 3 and the right pipe body 4, and then continuous welding is performed along the circumference of the left pipe body 3 and the right pipe body 4. During the spot welding of the left pipe body 3 and the right pipe body 4, the periods of stillness and rotation alternate. During the continuous welding of the left pipe body 3 and the right pipe body 4, the left pipe body 3 and the right pipe body 4 rotate continuously, thus ensuring a more secure weld between the left pipe body 3 and the right pipe body 4. Fourthly, during the spot welding of the left pipe body 3 and the right pipe body 4, pump body 603 is started when the left pipe body 3 and the right pipe body 4 are stationary, and pump body 603 is turned off when the left pipe body 3 and the right pipe body 4 rotate. The start of pump body 603 allows the coolant inside storage tank 602 to be transported to the volute cavity 607 through conduit 604 and fixed cylinder 605. When the pressure inside the volute cavity 607 increases, the volute metal rubber sheet 606 deforms, causing the volute metal rubber... One outer end of the sheet 606 extends outward and contacts the inner walls of the left tube 3 and the right tube 4. Therefore, through the friction between the volute metal rubber sheet 606 and the left tube 3 and the right tube 4, the volute metal rubber sheets 606 on both sides can push the left tube 3 and the right tube 4 inward in the opposite direction, which can make the connection between the left tube 3 and the right tube 4 fit tightly, and at the same time, it can support the welded joint of the left tube 3 and the right tube 4 from the inside.

[0030] The working principle and usage process of this invention are as follows: The left tube 3 is placed on the left guide wheel 102 from the left end, and the right tube 4 is placed on the right guide wheel 102 from the right end. Then, the first steering motor 503 and the second steering motor 504 on one side of the first axial swing arm 506 and the second axial swing arm 507 are activated. The first steering motor 503 and the second steering motor 504 can drive two sets of meshing half-tooth discs 505 to rotate simultaneously in opposite directions. The two sets of half-tooth discs 505 can also drive the first axial swing arm 506 and the second axial swing arm 507 to rotate inward simultaneously in opposite directions. The first axial swing arm 506 and the second axial swing arm 507, through the U-shaped frame 510, can drive the axial roller 513 to contact the left tube 3 and the right tube 4, thus making the left... When tube 3 and right tube 4 disengage from guide wheel 102, pressure sensor 515 detects contact with left tube 3 and right tube 4 and stops the operation of steering motor 503 and steering motor 504. Simultaneously, drive motor 511 starts, causing the axial rollers 513 on each side of left tube 3 and right tube 4 to rotate in the opposite direction. This allows left tube 3 and right tube 4 to move in the opposite direction, positioning the connection point of left tube 3 and right tube 4 directly below welding torch 106, thus enabling them to be joined. Similarly, starting the steering motors 503 and 504 on one side of radial swing arm 508 and radial swing arm 509 to rotate in the opposite direction allows radial roller 514 to contact left tube 3 and right tube 4. The left tube 3 and right tube 4 disengage from the axial roller 513, and simultaneously the drive motor 511 is activated to drive the radial roller 514 to rotate intermittently. This allows the radial roller 514 to drive the left tube 3 and right tube 4 to rotate intermittently in the same direction, alternating between stationary and rotating states. This enables automatic spot welding at the connection point of the left tube 3 and right tube 4, improving the weld strength. Then, the welding machine 104 and welding electric rod 105 are activated, and the welding electric rod 105 moves the welding torch 106 downwards to the connection point of the left tube 3 and right tube 4. When the left tube 3 and right tube 4 are stationary, the welding torch 106 automatically welds them. When the left tube 3 and right tube 4 rotate, the welding torch 106 stops welding. Therefore, during the intermittent rotation of the left tube 3 and right tube 4, spot welding is first performed along the circumference of the left tube 3 and right tube 4, and then continuous welding is performed along the circumference of the left tube 3 and right tube 4. In addition, when the connection between the left tube 3 and right tube 4 is moved directly below the welding torch 106, the height of the telescopic slide rod 111 is adjusted, and the adjusting motor 107 is started to drive the lead screw 108 to rotate. Then, the lead screw 108 can drive the adjusting electric rod 112 to move inward through the telescopic slide rod 111, so that the adjusting electric rod 112 can move the three-head frame 601 on the left and right sides into the left tube 3 and right tube 4 respectively. Then the adjusting motor 107 is stopped.Reactivating the electric adjusting lever 112 will move the volute-shaped metal rubber sheet 606 to both sides of the connection between the left tube 3 and the right tube 4, as per the attached instruction manual. Figure 8As shown, during the spot welding of the left pipe body 3 and the right pipe body 4 by the welding torch 106, and during the intermittent rotation of the left pipe body 3 and the right pipe body 4, when the left pipe body 3 and the right pipe body 4 are stationary, the pump body 603 is activated to transport the coolant inside the storage tank 602 to the volute cavity 607 through the conduit 604 and the stationary cylinder 605. This increases the pressure inside the volute cavity 607, and the volute metal rubber sheet 606 deforms and unfolds, causing the outer part of the volute metal rubber sheet 606 to contact the inner wall of the left pipe body 3 and the right pipe body 4. Through the friction between the volute metal rubber sheet 606 and the inner wall of the left pipe body 3 and the right pipe body 4, the volute metal rubber sheets 606 on both sides have an inward and opposite pushing force, causing the left pipe body 3 and the right pipe body 4 to rotate in opposite directions. 4. The two tubes can be tightly bonded together in opposite directions, and the volute-shaped metal rubber sheet 606 can also support the weld joint of the left tube 3 and right tube 4 from the inside out. The volute-shaped metal rubber sheet 606 and the internal coolant can quickly cool and solidify the weld joint of the left tube 3 and right tube 4. At this time, the welding gun 106 performs spot welding on the tightly bonded left tube 3 and right tube 4. After the spot welding is completed, the pump body 603 is closed, so that the coolant inside the volute cavity 607 flows back to the storage tank 602 through the conduit 604 and the fixed cylinder 605. The outside of the volute-shaped metal rubber sheet 606 deforms and retracts to its original position and detaches from the inner wall of the left tube 3 and right tube 4. Then the left tube 3 and right tube 4 rotate again, so that the volute-shaped metal rubber sheet 606 can be tightly bonded together in opposite directions. The volute rubber sheet 606 will not interfere with the left tube 3 and the right tube 4. Therefore, the volute rubber sheet 606, through its inner support and axial force, can keep the left tube 3 and the right tube 4 tightly attached together, making the welding torch 106 more secure during the circumferential spot welding of the left tube 3 and the right tube 4. After the spot welding of the left tube 3 and the right tube 4 is completed, the volute rubber sheet 606 is detached from the left tube 3 and the right tube 4, while the left tube 3 and the right tube 4 rotate continuously. Therefore, the welding torch 106 can continuously weld the left tube 3 and the right tube 4. After the welding of the left tube 3 and the right tube 4 is completed, the tripod 601 is first moved to the outside of the left tube 3 and the right tube 4, and then the telescopic slide rod 111 is retracted. At this time, the first steering motor 503 and the second steering motor 504 on one side of the first axial swing arm 506 and the second axial swing arm 507 are started. Similarly, the first axial swing arm 506 and the second axial swing arm 507 can drive the axial roller 513 to contact the left tube 3 and the right tube 4. Then, the first radial swing arm 508 and the second radial swing arm 509 are rotated in the opposite direction, so that the radial roller 514 is disengaged from the left tube 3 and the right tube 4. At the same time, the drive motor 511 is started and drives the axial roller 513 to rotate. Then, the axial roller 513 can drive the welded left tube 3 and the right tube 4 to move to the left or right, and remove the welded left tube 3 and the right tube 4, thereby completing the automatic welding process of the two thin-walled tubes.

[0031] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical engineering thin-walled pipe automatic welding device, comprising a base frame (1), characterized in that: Two left and right hexagonal frames (2) are fixed above the base frame (1), and a left tube body (3) and a right tube body (4) are respectively arranged inside the left and right hexagonal frames (2). A docking structure (5) for connecting the left tube body (3) and the right tube body (4) is arranged on the hexagonal frame (2), and a supporting structure (6) for supporting the welding point is arranged inside the left tube body (3) and the right tube body (4); The base frame (1) comprises a V-shaped frame (101), the V-shaped frame (101) being fixed at the front and rear ends of the base frame (1), a guide wheel (102) being rotatable on the V-shaped frame (101), a wire frame (103) being fixed between the left and right hexagonal frames (2), a welding machine (104) being fixed on the upper surface of the wire frame (103), a welding electric rod (105) being fixed on the bottom surface of the wire frame (103), and a welding gun (106) being fixed at the bottom end of the welding electric rod (105), An adjusting motor (107) is fixed on the inner side of the base frame (1), a screw rod (108) is fixed on the output end of the adjusting motor (107), a guide rail (109) is fixed on the outer side of the base frame (1), a guide groove (110) is provided inside the guide rail (109), a telescopic slide rod (111) slides inside the guide groove (110), the screw rod (108) passes through the telescopic slide rod (111) and is threadedly connected thereto, and an adjusting electric rod (112) is fixed on the telescopic slide rod (111).

2. The automatic welding device for thin-walled pipes in mechanical engineering according to claim 1, characterized in that: The docking structure (5) comprises a docking electric rod (501), the docking electric rod (501) being fixed on the outside of the hexagonal frame (2), a linkage frame (502) being fixed to the output end of the docking electric rod (501), a first steering motor (503) being fixed to one side of the linkage frame (502), a second steering motor (504) being fixed to the other side of the linkage frame (502), two sets of mutually meshing half gear discs (505) being fixed to the output ends of the first steering motor (503) and the second steering motor (504), a first axial swing arm (506) and a second axial swing arm (507) being arranged axially of the left tube body (3) and the right tube body (4), and a first radial swing arm (508) and a second radial swing arm (509) being arranged radially of the left tube body (3) and the right tube body (4). 509), the ends of the first axial swing arm (506) and the second axial swing arm (507) as well as the first radial swing arm (508) and the second radial swing arm (509) are all fixed with a U-shaped frame (510), a driving motor (511) is fixed on one side of the U-shaped frame (510), a control power supply (512) is fixed on the other side of the U-shaped frame (510), an axial roller (513) is fixed on the output end of the driving motor (511) on one side of the first axial swing arm (506) and the second axial swing arm (507), a radial roller (514) is fixed on the output end of the driving motor (511) on one side of the first radial swing arm (508) and the second radial swing arm (509), and a pressure sensor (515) is fixed on each of the axial roller (513) and the radial roller (514).

3. The automatic welding device for thin-walled pipes in mechanical engineering according to claim 2, characterized in that: The first steering motor (503) and the second steering motor (504) are respectively located on two sides of the linkage frame (502), and the output ends of the first steering motor (503) and the second steering motor (504) are respectively fixedly connected to the half gear disc (505) on one side thereof.

4. The automatic welding device for thin-walled pipes in mechanical engineering according to claim 2, characterized in that: The first axial swing arm (506) and the second axial swing arm (507) are respectively fixedly connected to two groups of half toothed discs (505) arranged axially, and the first radial swing arm (508) and the second radial swing arm (509) are respectively fixedly connected to two groups of half toothed discs (505) arranged radially.

5. The automatic welding device for thin-walled pipes in mechanical engineering according to claim 2, characterized in that: A conductive roller is fixed on one side of the axial roller (513) and the radial roller (514) close to the control power supply (512), a conductive brush is fixed on the control power supply (512), and the conductive roller and the conductive brush are rotatably connected.

6. The automatic welding device for thin-walled pipes in mechanical engineering according to claim 2, characterized in that: The supporting structure (6) comprises a three-head frame (601), the three-head frame (601) is fixed on the adjusting electric rod (112), a storage tank (602) is fixed on the end surface of the three-head frame (601), a pump body (603) is fixed on the outer end of the three-head frame (601), a guide tube (604) is fixed on the pump body (603), a fixed cylinder (605) is fixed between the guide tubes (604), a volute-shaped metal rubber sheet (606) is fixed on the surface of the fixed cylinder (605), and a volute-shaped cavity (607) is provided inside the volute-shaped metal rubber sheet (606).

7. The automatic welding device for thin-walled pipes in mechanical engineering according to claim 6, characterized in that: Cooling liquid is provided inside the storage tank (602), and the storage tank (602) is connected to the pump body (603) via a connecting pipe.

8. The automatic welding device for thin-walled pipes in mechanical engineering according to claim 6, characterized in that: The pump body (603), the conduit (604), the fixed cylinder (605), and the volute cavity (607) are interconnected.

9. The automatic welding device for thin-walled pipes in mechanical engineering according to claim 6, characterized in that: The volute-shaped metal rubber sheets (606) are arranged in three groups at equal intervals along the circumferential direction of the left tube body (3) and the right tube body (4); the volute-shaped metal rubber sheets (606) are volute-shaped; an inner end of the volute-shaped metal rubber sheets (606) is fixedly connected to the fixed cylinder (605); and an outer end of the volute-shaped metal rubber sheets (606) is in contact with the inner walls of the left tube body (3) and the right tube body (4).

10. The method for using the automatic welding device for thin-walled pipes in mechanical engineering according to any one of claims 1 to 9, characterized in that: The following steps are involved: The first step is to place the left tube body (3) from the left end onto the guide wheel (102), and place the right tube body (4) from the right end onto the guide wheel (102), and then simultaneously push the left tube body (3) and the right tube body (4) inwardly so that the left tube body (3) and the right tube body (4) are in contact with each other, so that the welding point of the left tube body (3) and the right tube body (4) is located directly below the welding gun (106), so that the left tube body (3) and the right tube body (4) can be automatically welded later; The second step is to start the first steering motor (503) and the second steering motor (504) to rotate in the opposite direction. The first steering motor (503) and the second steering motor (504) can make the first radial swing arm (508) and the second radial swing arm (509) rotate in the opposite direction in synchronization through the meshing of the two sets of half gear plates (505), so that the first radial swing arm (508) and the second radial swing arm (509) can drive the radial roller (514) to contact the left tube body (3) and the right tube body (4) through the U-shaped frame (510), and then start the driving motor (511) to drive the radial roller (514) to rotate, so that the radial roller (514) can simultaneously drive the left tube body (3) and the right tube body (4) to rotate in the same direction in an intermittent manner, so as to subsequently weld the left tube body (3) and the right tube body (4) in the circumferential direction; The third step is to start the welding machine (104) and the welding electric rod (105) while the left tube body (3) and the right tube body (4) are intermittently rotating, that is, while the left tube body (3) and the right tube body (4) are stationary and rotating alternately, so that the welding electric rod (105) drives the welding gun (106) to move to the connection point of the left tube body (3) and the right tube body (4). When the left tube body (3) and the right tube body (4) are stationary, the welding gun (106) automatically welds the left tube body (3) and the right tube body (4). When the left tube body (3) and the right tube body (4) are rotating, the welding machine (104) and the welding electric rod (105) are driven by the welding gun (106) to move to the connection point of the left tube body (3) and the right tube body (4). When the welding gun (106) stops welding, spot welding is first performed along the circumferential direction of the left tube body (3) and the right tube body (4), and then continuous welding is performed along the circumferential direction of the left tube body (3) and the right tube body (4). In the process of spot welding the left tube body (3) and the right tube body (4), the left tube body (3) and the right tube body (4) are alternately stationary and rotating. In the process of continuous welding the left tube body (3) and the right tube body (4), the left tube body (3) and the right tube body (4) are continuously rotated, so that the left tube body (3) and the right tube body (4) can be welded more firmly. In the fourth step, during the spot welding of the left tube body (3) and the right tube body (4), the pump body (603) is started when the left tube body (3) and the right tube body (4) are stationary, and the pump body (603) is closed when the left tube body (3) and the right tube body (4) are rotating. The pump body (603) is started to transport the cooling liquid in the storage tank (602) through the guide tube (604) and the fixed cylinder (605) to the volute cavity (607). When the pressure inside the volute cavity (607) increases, the volute metal rubber sheet (606) is deformed, causing the volute metal One outer end of the rubber sheet (606) is spread outward and contacts the inner walls of the left tube body (3) and the right tube body (4). Therefore, through the friction between the spiral metal rubber sheet (606) and the left tube body (3) and the right tube body (4), the spiral metal rubber sheets (606) on the left and right sides have a tendency to push the left tube body (3) and the right tube body (4) inward in the opposite direction, so that the connection between the left tube body (3) and the right tube body (4) can be tightly fitted, and at the same time, the welding point between the left tube body (3) and the right tube body (4) can be supported from the inside.

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