A can body necking and weld processing device

Abstract

This invention discloses a tank necking and weld processing device, belonging to the field of tank processing technology. It includes a U-shaped device body, with a clamping mechanism located at the middle of the upper surface of the U-shaped device body. Processing mechanisms are located on both sides of the clamping mechanism. Each processing mechanism includes a pair of sliding rails connected to one side of the outer surface of the U-shaped device body, with a U-shaped slider slidably connected inside each sliding rail. An O-shaped sliding frame is slidably connected inside each U-shaped slider, and the O-shaped sliding frame passes through the U-shaped slider. This device, through its primary fixing clamp and fixing frame, can fix tank walls of different diameters and lengths, improving its applicability. Furthermore, with two necking platforms and two welding robotic arms, it can simultaneously perform necking processing on both ends of the tank wall, and then simultaneously weld the tank wall to the tank bottom and top, further improving the processing efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of tank processing technology, and more specifically, to a device for tank necking and weld processing. Background Technology

[0002] A tank is a container used to store or transport liquids, gases, solids, and other substances, and is widely used in industries such as chemical, petroleum, food, pharmaceutical, and environmental protection. Tanks can be classified into various types based on their material, structure, and purpose, such as metal tanks, plastic tanks, and composite material tanks. Metal tanks are typically made of materials such as stainless steel, carbon steel, and aluminum alloys, and are characterized by high strength, corrosion resistance, and high-temperature resistance. Most metal tanks consist of a bottom, walls, and a top, which are welded together to form a complete tank.

[0003] During processing, the tank wall is aligned with the tank bottom and top, and then the three are connected together by welding to complete the tank body processing. However, directly aligning the tank wall with the tank bottom and top can easily cause misalignment, affecting the yield of the tank body. Therefore, before welding, it is necessary to perform a necking process at the joints where the tank wall meets the tank bottom and top, so that the outer diameter of the tank wall ends matches the inner diameter of the tank bottom and top, thereby inserting the tank bottom and top with the tank wall. This facilitates welding the tank wall, tank bottom, and tank top together, improving the tank body processing efficiency and yield.

[0004] However, existing processing devices mainly use fixed molds to squeeze the ends of the tank wall to reduce its diameter when narrowing the tank walls. However, the shape of the fixed molds is fixed and cannot be changed, which means that the processing device can only perform narrowing processing on a single outer diameter. When it is necessary to process narrowing with different outer diameters, it is necessary to constantly change the fixed molds of different diameters, which reduces the working efficiency of the processing device. Furthermore, it is impossible to adjust the outer diameter of the narrowed tank according to the inner diameter of the bottom and top of the tank, resulting in a certain gap between the outer diameter of the two ends of the tank wall and the inner diameter of the bottom and top of the tank, which affects the subsequent welding processing and reduces the yield of the processing device. To solve these problems, this application proposes a tank narrowing and welding processing device. Summary of the Invention

[0005] The purpose of this invention is to provide a device for tank necking and weld processing to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A tank necking and weld processing device includes a U-shaped device body. A clamping mechanism is provided at the middle position of the upper surface of the U-shaped device body. Processing mechanisms are provided on both sides of the clamping mechanism. Each processing mechanism includes a pair of slide rails with one side of the outer surface of the U-shaped device body. A U-shaped slider is slidably connected inside each slide rail. An O-shaped sliding frame is slidably connected inside each U-shaped slider, and the O-shaped sliding frame passes through the U-shaped slider.

[0008] The O-shaped sliding frame is slidably connected to the upper surface of the U-shaped device body. A narrowing platform is fixedly connected to one side of the upper surface of the O-shaped sliding frame, and a pair of narrowing platforms are located on both sides of the clamping mechanism. A welding robot arm is fixedly connected to the other side of the upper surface of the O-shaped sliding frame. A narrowing part is provided on the side of the outer surface of the narrowing platform near the clamping mechanism. A positioning mechanism is provided on the other side of the outer surface of the narrowing platform. A fixing mechanism is provided on both sides of the upper surface of the U-shaped device body, and the fixing mechanism is located on the side of the narrowing platform away from the clamping mechanism.

[0009] The clamping mechanism includes two fixed frames that are slidably connected to the middle position of the upper surface of the U-shaped device body. A movable structure is provided at the middle position of the upper surface of the U-shaped device body, and the movable structure is connected to the two fixed frames to drive the two fixed frames to move. A circular through hole is provided at the center position of the two fixed frames. A first annular plate is rotatably connected to the inner circular surface of the fixed frame. A first fixed clamp is provided on the inner circular surface of the first annular plate. A rotating part is provided on the outer circular surface of the first annular plate to drive the first annular plate to rotate.

[0010] The constriction section includes a set of four first-order sliding grooves on the outer surface of the constriction platform near the clamping mechanism. The four first-order sliding grooves are arranged in a circle. An L-shaped slider is slidably connected inside each of the four first-order sliding grooves. A constriction roller is rotatably connected to the short handle of each of the four L-shaped sliders. All four constriction rollers face the center of the constriction platform. A telescopic rod is fixedly connected to one side of the outer surface of each L-shaped slider. All four telescopic rods are fixedly connected to the constriction platform. A limit mechanism is provided on one side of the outer surface of each L-shaped slider. The limit mechanism is located on the side of the constriction roller near the center of the constriction platform.

[0011] By adopting the above technical solution, the two sets of No. 1 fixing clamps can fix tank walls of different diameters, and the distance between the two fixing frames is easy to adjust, allowing the two sets of No. 1 fixing clamps to move towards both ends of the tank wall, which can better fix the tank wall, and at the same time, it is convenient for the two sets of No. 1 fixing clamps to fix tank walls of different lengths. The clamping mechanism can fix tank walls of different diameters and lengths. By extending and shortening the No. 1 telescopic rod of the constriction section, the movement of the constriction rollers is controlled, ensuring that one end of the tank wall can move to the middle of the four constriction rollers, and then the four constriction rollers move towards the middle, thereby performing constriction processing on one end of the tank wall.

[0012] Preferably, the positioning mechanism includes four second-order sliding grooves formed on one side of the outer surface of the constriction platform, and the positions of the four second-order sliding grooves correspond to the positions of the four first-order sliding grooves. A first-order slider is slidably connected inside each of the second-order sliding grooves. A cylindrical positioning block is fixedly connected to one side of the outer surface of each first-order slider. A threaded rod is rotatably connected inside each of the four second-order sliding grooves, and the threaded rod passes through the first-order slider and is threadedly connected to it. A limit block is fixedly connected to the side of the outer surface of the L-shaped slider near the first-order slider, and the limit block extends into the second-order sliding groove and is slidably connected to it. A driving part is provided at the intersection of one end of the four threaded rods.

[0013] By adopting the above technical solution, rotating the threaded rod drives the cylindrical positioning block to move, so that the four cylindrical positioning blocks can fit against the inner wall of the tank bottom and tank top of different diameters, thereby fixing the tank bottom and tank top of different diameters.

[0014] Preferably, the drive unit includes an installation cavity opened at the center of the constriction platform. A second motor is fixedly connected to one side of the installation cavity. A first bevel gear is fixedly connected to the output end of the second motor. One end of each of the four threaded rods passes through the installation cavity and is fixedly connected to a second bevel gear. All four second bevel gears mesh with the first bevel gear.

[0015] By adopting the above technical solution, four threaded rods are driven to rotate simultaneously, thereby controlling the synchronous movement of four cylindrical positioning blocks.

[0016] Preferably, the four limiting blocks are all located on the side of the four first sliders away from the center of the narrowing platform, and the lower surface of the limiting block is on the same plane as the side line of the narrowing roller near the center of the narrowing platform, and the side line of the cylindrical positioning block away from the center of the narrowing platform is on the same plane as the upper surface of the first slider.

[0017] By adopting the above technical solution, when the limiting block is in contact with the first slider, the side line of the narrowing roller near the center of the narrowing platform and the side line of the cylindrical positioning block away from the center of the narrowing platform are both located on the same plane.

[0018] Preferably, the limiting mechanism includes a third slide groove on one side of the outer surface of the L-shaped slider. A second slider is slidably connected inside each of the third slide grooves, and the second slider is located on the side of the constriction roller near the center of the constriction platform. A limiting roller is rotatably connected to the outer surface of the second slider near the constriction roller. A second telescopic rod is fixedly connected to one side of the inner wall of the third slide groove. The output end of the second telescopic rod is fixedly connected to the second slider, and the contact surface between the output end of the second telescopic rod and the second slider is the side where the limiting roller is located.

[0019] By adopting the above technical solution, the limiting roller is driven to move towards the narrowing roller, so that the limiting roller and the narrowing roller simultaneously limit the tank wall, preventing the deformation of the tank wall caused by applying pressure to one side during the narrowing process, and ensuring the smoothness and flatness of the outer and inner sides of the narrowing part of the tank wall.

[0020] Preferably, the rotating part includes a first gear fixedly connected to the outer circular surface of the first annular plate, a second gear meshing with one side of the outer surface of the first gear, and the second gear is located inside the fixed frame. A first motor is fixedly connected to one side of the outer surface of the fixed frame, and the output end of the first motor is fixedly connected to the second gear.

[0021] By adopting the above technical solution, the tank wall can be driven to rotate, which facilitates the narrowing and welding of the tank wall.

[0022] Preferably, the fixing mechanism includes a set of three telescopic rods fixedly connected to both sides of the outer surface of the U-shaped device body, and the telescopic ends of the two sets of three telescopic rods are fixedly connected to the movable plate through the U-shaped device body. The outer surface of the two movable plates is provided with a placement groove on the side near the narrowing platform. A second annular plate is rotatably connected to one side of the inner circular surface of the placement groove, and a second fixing clamp is provided inside the second annular plate.

[0023] By adopting the above technical solution, the bottom and top of the tank are fixed inside the two movable plates respectively, which makes it easy to engage the bottom and top of the tank with the two ends of the tank wall.

[0024] Preferably, a fourth sliding groove is provided at the center of the inner wall of the placement groove, a cap-shaped abutment block is slidably connected inside the fourth sliding groove, and a rubber pad is fixedly connected to the outer surface of the cap-shaped abutment block away from the fourth sliding groove. A abutment spring is provided inside the cap-shaped abutment block.

[0025] By adopting the above technical solution, the bottom and top of the tank are pressed tightly against the tank wall, preventing separation between the bottom or top of the tank and the tank wall during welding.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. When using this invention, the first fixing clamp can fix tank walls of different diameters, and the distance between the two fixing frames can be adjusted, thereby fixing tank walls of different lengths, which improves the applicability of the device. In addition, there are two tapering platforms and two welding robotic arms, which can simultaneously perform tapering processing on both ends of the tank wall, and then simultaneously weld the tank wall to the tank bottom and the tank top, further improving the processing efficiency of the device.

[0028] 2. In use, this invention simultaneously restricts the outer and inner sides of the tank wall using both the necking roller and the limiting roller, effectively preventing tank wall deformation caused by applying pressure to only one side during the necking process, thus improving the yield of the tank wall necking process. It also ensures the smoothness and flatness of the outer and inner sides of the tank wall at the necking point, facilitating subsequent welding between the tank wall and the tank bottom and top, further improving the yield of the tank body processing.

[0029] 3. When this invention is used, after the limiting block and the first slider are engaged, the upper surface of the first slider and the lower surface of the limiting block are on the same plane. This causes the inner wall side line of the tank bottom or top to be on the same plane as the outer wall side line of one end of the tank wall, ensuring that the inner diameter of the tank bottom or top is the same as the outer diameter of one end of the tank wall. This allows the constricted ends of the tank bottom and top to fit together perfectly, preventing gaps at the connection between the tank bottom / top and the tank wall, improving the stability of the welding between the tank bottom / top and the tank wall, and thus increasing the yield rate of the tank body welding process. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a cross-sectional schematic diagram of the main body of the U-shaped device of the present invention;

[0032] Figure 3 This is a cross-sectional schematic diagram of the fixing frame of the present invention;

[0033] Figure 4 This is a schematic diagram of the U-shaped slider of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the necking platform of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the L-shaped slider of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the No. 1 slider of this invention;

[0037] Figure 8 This is a schematic diagram showing the disassembled threaded rod of the present invention;

[0038] Figure 9 This is a cross-sectional schematic diagram of the movable plate of the present invention;

[0039] Figure 10 This is a cross-sectional schematic diagram of the cap-shaped clamping block of the present invention.

[0040] The numbers in the diagram are as follows: 1. Main body of the U-shaped device; 2. Fixture; 21. Moving structure; 22. Ring plate No. 1; 23. Fixing clamp No. 1; 24. Gear No. 1; 25. Gear No. 2; 26. Motor No. 1;

[0041] 3. No. 1 slide rail; 31. U-shaped slider; 32. O-shaped sliding frame; 33. Narrowing platform; 34. Welding robot arm; 35. No. 1 slide groove; 36. L-shaped slider; 37. Narrowing roller; 38. No. 1 telescopic rod;

[0042] 4. No. 2 slide rail; 41. No. 1 slider; 42. Cylindrical positioning block; 43. Mounting cavity; 44. No. 2 motor; 45. No. 1 bevel gear; 46. No. 2 bevel gear; 47. Threaded rod; 48. Limiting block;

[0043] 5. No. 3 slide rail; 51. No. 2 slider; 52. Limiting roller; 53. No. 2 telescopic rod;

[0044] 6. Telescopic rod No. 3; 61. Movable plate; 62. Placement slot; 63. Annular plate No. 2; 64. Fixing clamp No. 2; 65. Slide groove No. 4; 66. Hat-shaped clamping block; 67. Clamping spring. Detailed Implementation

[0045] Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 A tank necking and weld processing device includes a U-shaped device body 1. A clamping mechanism is provided at the middle position of the upper surface of the U-shaped device body 1. Processing mechanisms are provided on both sides of the clamping mechanism. The processing mechanism includes a pair of slide rails 3 opened on one side of the outer surface of the U-shaped device body 1. U-shaped sliders 31 are slidably connected inside the slide rails 3. O-shaped sliding frames 32 are slidably connected inside the U-shaped sliders 31. The O-shaped sliding frames 32 pass through the U-shaped sliders 31 and are slidably connected to the upper surface of the U-shaped device body 1. A necking platform 33 is fixedly connected to one side of the upper surface of the O-shaped sliding frame 32. The pair of necking platforms 33 are located on both sides of the clamping mechanism. A welding robot arm 34 is fixedly connected to the other side of the upper surface of the O-shaped sliding frame 32. A necking part is provided on the side of the outer surface of the necking platform 33 near the clamping mechanism.

[0046] The clamping mechanism includes two fixed frames 2 that are slidably connected to the middle position of the upper surface of the U-shaped device body 1. A movable structure 21 is provided at the middle position of the upper surface of the U-shaped device body 1, and the movable structure 21 is connected to the two fixed frames 2 to drive the two fixed frames 2 to move. A circular through hole is provided at the center position of the two fixed frames 2. A first annular plate 22 is rotatably connected to the inner circular surface of the fixed frame 2. A first fixed clamp 23 is provided on the inner circular surface of the first annular plate 22. A rotating part is provided on the outer circular surface of the first annular plate 22 to drive the first annular plate 22 to rotate.

[0047] The narrowing section includes a set of four first-order slide grooves 35 on the outer surface of the narrowing platform 33 near the clamping mechanism. The four first-order slide grooves 35 are arranged in a circle. Each of the four first-order slide grooves 35 is slidably connected to an L-shaped slider 36. Each of the four L-shaped sliders 36 is rotatably connected to a narrowing roller 37 at its short handle. Each of the four narrowing rollers 37 faces the center of the narrowing platform 33. Each of the four L-shaped sliders 36 is fixedly connected to a telescopic rod 38 on one side of its outer surface. Each of the four telescopic rods 38 is fixedly connected to the narrowing platform 33. A limit mechanism is provided on one side of the outer surface of the L-shaped slider 36. The limit mechanism is located on the side of the narrowing roller 37 near the center of the narrowing platform 33. A positioning mechanism is provided on the other side of the outer surface of the narrowing platform 33.

[0048] Specifically, the limiting mechanism includes a third slide groove 5 opened on one side of the outer surface of the L-shaped slider 36. A second slider 51 is slidably connected inside the third slide groove 5. The second slider 51 is located on the side of the constriction roller 37 near the center of the constriction platform 33. A limiting roller 52 is rotatably connected to the side of the outer surface of the second slider 51 near the constriction roller 37. A second telescopic rod 53 is fixedly connected to one side of the inner wall of the third slide groove 5. The output end of the second telescopic rod 53 is fixedly connected to the second slider 51, and the contact surface between the output end of the second telescopic rod 53 and the second slider 51 is the side where the limiting roller 52 is set.

[0049] Furthermore, the rotating part includes a first gear 24 fixedly connected to the outer circular surface of the first annular plate 22. A second gear 25 is meshed with one side of the outer surface of the first gear 24, and the second gear 25 is located inside the fixed frame 2. A first motor 26 is fixedly connected to one side of the outer surface of the fixed frame 2, and the output end of the first motor 26 is fixedly connected to the second gear 25.

[0050] The steps of using this invention are as follows: First, place the tank wall to be processed between two fixed frames 2. Then, activate the moving structure 21 to drive the two fixed frames 2 to move towards the tank wall, so that both ends of the tank are inserted into the two fixed frames 2. Activate the first fixing clamp 23 to clamp and fix the tank in the fixed frame 2. The two first fixing clamps 23 simultaneously fix the tank wall from both ends, improving the fixing effect. The first fixing clamp 23 is composed of a telescopic rod and a clamping plate, which allows the first fixing clamp 23 to fix tank walls of different diameters, improving the applicability of the device.

[0051] Then, the first slide rail 3 is activated to drive the U-shaped slider 31 to move, which in turn moves the O-shaped sliding frame 32 towards the tank. This causes one side of the narrowing platform 33 to approach one end of the tank, and the narrowing section then performs narrowing processing on one end of the tank. Simultaneously, the first motor 26 is activated to drive the second gear 25 to rotate, which in turn drives the first gear 24 to rotate, thereby rotating the first annular plate 22 and ultimately rotating the tank. This completes the narrowing processing on one end of the tank. Since there are two narrowing platforms 33, both ends of the tank can be narrowed simultaneously, improving the working efficiency of the device. After the necking process is completed, slide rail 3 is activated, driving U-shaped slider 31 to move O-shaped sliding frame 32 away from the tank body. Then, U-shaped slider 31 drives O-shaped sliding frame 32 to move, causing necking platform 33 to move away from the main body 1 of the U-shaped device. Simultaneously, welding robot arm 34 moves towards the main body 1 of the U-shaped device, and then engages the necked ends of the tank bottom and top with the necked ends of the tank wall. Then, welding robot arm 34 is activated to weld the tank wall to the engaged ends of the tank bottom and top. At the same time, motor 26 is activated to drive the tank wall to rotate, thus completing the tank body processing. This device performs necking processing at both ends of the tank wall and then promptly welds the tank bottom and top to the tank wall, improving the processing efficiency of the device. Furthermore, the presence of two welding robot arms 34 allows for simultaneous welding of both the tank wall and the tank bottom and top, further enhancing the processing efficiency of the device.

[0052] Then, as the narrowing platform 33 moves toward the tank wall, the first telescopic rod 38 is simultaneously activated to shorten, causing the L-shaped slider 36 to move within the first slide groove 35. This drives all four L-shaped sliders 36 to move simultaneously toward the periphery of the narrowing platform 33. When the narrowing platform 33 approaches the tank wall, one end of the tank wall is located inside the four narrowing rollers 37, and the tank wall itself is positioned between the narrowing rollers 37 and the limiting rollers 52. The first telescopic rod 38 is then activated to extend, driving the narrowing rollers 37 to move toward the tank wall and fit against the outer side of the tank wall. Then, the second telescopic rod 53 is activated to shorten. The short movement of the first motor causes the second slider 51 to move within the third slide groove 5, thereby driving the limiting roller 52 to move towards the narrowing roller 37. This causes the limiting roller 52 to fit against the inner side of the tank wall. Then, the first motor 26 is activated to drive the tank wall to rotate, simultaneously activating the four first telescopic rods 38 to extend. This causes the four narrowing rollers 37 to move synchronously towards the center of the tank wall, allowing them to rotate around the outer side of the tank wall. This compresses one end of the tank wall from the outside inwards, reducing the diameter of that end and completing the narrowing of that end. Furthermore, as the narrowing roller 37 moves towards the center of the tank wall, it simultaneously drives the limiting roller 52 to move towards the center as well. The limiting roller 52, positioned against the inner side of the tank wall, restricts both the outer and inner sides of the tank wall simultaneously. This effectively prevents deformation of the tank wall caused by applying pressure from only one side during the narrowing process, thus improving the yield rate of the narrowing process. This also ensures the smoothness and flatness of the outer and inner sides of the tank wall constriction, which facilitates subsequent welding between the tank wall and the tank bottom and top, and improves the yield of the tank body processing.

[0053] Example 2, please refer to Figure 7 and Figure 8 The difference from embodiment 2 is that a positioning mechanism is provided on the other side of the outer surface of the narrowing platform 33. The positioning mechanism includes four second slide grooves 4 opened on one side of the outer surface of the narrowing platform 33, and the positions of the four second slide grooves 4 correspond to the positions of the four first slide grooves 35. A first slider 41 is slidably connected inside each of the second slide grooves 4. A cylindrical positioning block 42 is fixedly connected to one side of the outer surface of the first slider 41. A threaded rod 47 is rotatably connected inside each of the four second slide grooves 4, and the threaded rod 47 passes through the first slider 41 and is threadedly connected to the first slider 41. A limit block 48 is fixedly connected to the side of the outer surface of the L-shaped slider 36 near the first slider 41, and the limit block 48 extends into the second slide groove 4 and is slidably connected to the second slide groove 4. A driving part is provided at the intersection of one end of the four threaded rods 47.

[0054] Specifically, the drive unit includes an installation cavity 43 located at the center of the constricted platform 33. A second motor 44 is fixedly connected to one side of the installation cavity 43. A first bevel gear 45 is fixedly connected to the output end of the second motor 44. One end of each of the four threaded rods 47 passes through the installation cavity 43 and is fixedly connected to a second bevel gear 46. All four second bevel gears 46 are meshed with the first bevel gear 45.

[0055] Furthermore, the four limiting blocks 48 are all located on the side of the four first sliders 41 away from the center of the narrowing platform 33, and the lower surface of the limiting block 48 and the side line of the narrowing roller 37 near the center of the narrowing platform 33 are on the same plane, and the side line of the cylindrical positioning block 42 away from the center of the narrowing platform 33 and the upper surface of the first slider 41 are on the same plane.

[0056] The steps of using this invention are as follows: After the constriction roller 37 and the limiting roller 52 clamp one end of the can wall, the bottom or top of the can is placed on the side of the constriction platform 33 away from the can wall, so that the four cylindrical positioning blocks 42 are located inside the bottom or top of the can. Then, the second motor 44 is started to drive the first bevel gear 45 to rotate, and the first bevel gear 45 meshes with the second bevel gear 46, thereby driving the four second bevel gears 46 to rotate. At the same time, the threaded rod 47 is driven to rotate. Then, the threaded rod 47 passes through the first slider 41 and is threadedly connected to the first slider 41, thereby driving the first slider 41 to move inside the second slide groove 4. At the same time, the cylindrical positioning blocks 42 move synchronously, driving the four cylindrical positioning blocks 42 to move synchronously away from the center position of the constriction platform 33, so that the four cylindrical positioning blocks 42 simultaneously fit against the inner wall of the bottom or top of the can, thereby fixing the bottom or top of the can to one side of the constriction platform 33. Furthermore, the limiting block 48 fixed on one side of the L-shaped slider 36 moves inside the second slide groove 4, while the limiting block 48 is located on the side of the first slider 41 away from the center of the narrowing platform 33, so that the first slider 41 can restrict the movement of the narrowing roller 37.

[0057] Then, the first telescopic rod 38 is activated to extend and drive the necking roller 37 and the L-shaped slider 36 to move simultaneously towards the center of the necking platform 33, performing necking processing on one end of the tank wall. Simultaneously, it moves the limiting block 48 towards the first slider 41. When the limiting block 48 is in contact with the first slider 41, the L-shaped slider 36 and the necking roller 37 cannot move downwards, thus completing the necking processing on one end of the tank wall. Furthermore, because the side line of the cylindrical positioning block 42 is on the same plane as the upper surface of the first slider 41, the inner wall side line of the tank bottom or top is on the same plane as the upper surface of the first slider 41. At the same time, the lower surface of the limiting block 48 is on the same plane as the side line of the necking roller 37, making the outer wall side line of one end of the tank wall on the same plane as the lower surface of the limiting block 48. When the limiting block 48 and the first slider 41 are engaged, the upper surface of the first slider 41 and the lower surface of the limiting block 48 are on the same plane. This causes the inner wall side line of the tank bottom or top to be on the same plane as the outer wall side line of one end of the tank wall, ensuring that the inner diameter of the tank bottom or top is the same as the outer diameter of one end of the tank wall. This allows the constricted ends of the tank bottom and top to fit together perfectly, preventing gaps at the connection between the tank bottom / top and the tank wall, improving the stability of the welding between the tank bottom / top and the tank wall, and thus increasing the yield rate of the tank body welding process.

[0058] Example 3, please refer to Figure 9 and Figure 10 The difference from embodiment 3 is that a fixing mechanism is provided on both sides of the upper surface of the U-shaped device body 1, and the fixing mechanism is located on the side of the constriction platform 33 away from the clamping mechanism. The fixing mechanism includes a set of three telescopic rods 6 fixedly connected to both sides of the outer surface of the U-shaped device body 1, and the telescopic ends of the two sets of three telescopic rods 6 are fixedly connected to the moving plate 61 through the U-shaped device body 1. The outer surface of the two moving plates 61 is provided with a placement groove 62 on the side near the constriction platform 33. A second annular plate 63 is rotatably connected to one side of the inner circular surface of the placement groove 62, and a second fixing clamp 64 is provided inside the second annular plate 63.

[0059] Furthermore, a fourth sliding groove 65 is provided at the center of the inner wall of the placement groove 62. A cap-shaped abutment block 66 is slidably connected inside the fourth sliding groove 65, and a rubber pad is fixedly connected to the outer surface of the cap-shaped abutment block 66 away from the fourth sliding groove 65. A clamping spring 67 is provided inside the cap-shaped abutment block 66.

[0060] The steps of using this invention are as follows: After the two ends of the tank wall are narrowed, activate the first telescopic rod 38 and the second telescopic rod 53 to release the clamp on one end of the tank wall. Then, activate the third telescopic rod 6 to extend and drive the moving plate 61 to move towards the bottom or top of the tank, thereby moving the bottom or top of the tank into the placement groove 62. Then, activate the second fixing clamp 64 to clamp and fix the bottom or top of the tank from the outside. Next, activate the second motor 44 to drive the cylindrical positioning block 42 to move towards the center of the narrowing platform 33, thereby releasing the cylindrical positioning block 42 from fixing the bottom or top of the tank. Then, activate the third telescopic rod 6 and the U-shaped... The slider 31 separates the moving plate 61, the narrowing platform 33, and the tank wall. Then, the U-shaped slider 31 drives the O-shaped sliding frame 32 to move, causing the narrowing platform 33 to move away from the main body 1 of the U-shaped device. Simultaneously, the welding robot arm 34 moves towards the main body 1 of the U-shaped device. Then, the third telescopic rod 6 extends, driving the tank bottom or top towards the tank wall, causing the tank bottom or top to automatically engage with the tank wall. The welding robot arm 34 then welds the tank wall at the engaged position, completing the tank processing and improving the device's efficiency. Furthermore, the elastic potential energy of the clamping spring 67 drives the cap-shaped clamping block 66 to move outwards towards the fourth sliding groove 65, thereby squeezing the tank bottom or top towards the tank wall, ensuring a better engagement and preventing separation during welding, which would affect the welding process.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for tank necking and weld processing, comprising a U-shaped device body (1), wherein a clamping mechanism is provided at the middle position of the upper surface of the U-shaped device body (1), characterized in that: Both sides of the clamping mechanism are provided with processing mechanisms. The processing mechanism includes a pair of No. 1 slide rails (3) opened on one side of the outer surface of the U-shaped device body (1). U-shaped sliders (31) are slidably connected inside the No. 1 slide rails (3). O-shaped sliding frames (32) are slidably connected inside the U-shaped sliders (31). The O-shaped sliding frames (32) penetrate through the U-shaped sliders (31). The O-shaped sliding frame (32) is slidably connected to the upper surface of the U-shaped device body (1). A narrowing platform (33) is fixedly connected to one side of the upper surface of the O-shaped sliding frame (32), and a pair of narrowing platforms (33) are located on both sides of the clamping mechanism. A welding robot arm (34) is fixedly connected to the other side of the upper surface of the O-shaped sliding frame (32). A narrowing part is provided on the side of the outer surface of the narrowing platform (33) close to the clamping mechanism. A positioning mechanism is provided on the other side of the outer surface of the narrowing platform (33). A fixing mechanism is provided on both sides of the upper surface of the U-shaped device body (1), and the fixing mechanism is located on the side of the narrowing platform (33) away from the clamping mechanism. The constriction section includes a set of first-order slide grooves (35) opened on the outer surface of the constriction platform (33) near the clamping mechanism. There are four first-order slide grooves (35) in a circular arrangement. An L-shaped slider (36) is slidably connected inside each of the four first-order slide grooves (35). A constriction roller (37) is rotatably connected to the short handle of each of the four L-shaped sliders (36). The four constriction rollers (37) face the center of the constriction platform (33). A first-order telescopic rod (38) is fixedly connected to one side of the outer surface of each L-shaped slider (36). The four first-order telescopic rods (38) are fixedly connected to the constriction platform (33). A limit mechanism is provided on one side of the outer surface of each L-shaped slider (36). The limit mechanism is located on the side of the constriction roller (37) near the center of the constriction platform (33). The positioning mechanism includes four second slide grooves (4) opened on one side of the outer surface of the constricted platform (33), and the positions of the four second slide grooves (4) correspond to the positions of the four first slide grooves (35). The first slide block (41) is slidably connected inside each of the second slide grooves (4). A cylindrical positioning block (42) is fixedly connected to one side of the outer surface of the first slide block (41). A threaded rod (47) is rotatably connected inside each of the four second slide grooves (4), and the threaded rod (47) passes through the first slide block (41) and is threadedly connected to the first slide block (41). A limiting block (48) is fixedly connected to the side of the outer surface of the L-shaped slide block (36) close to the first slide block (41), and the limiting block (48) extends into the second slide groove (4) and is slidably connected to the second slide groove (4). A driving part is provided at the intersection of one end of the four threaded rods (47). The limiting mechanism includes a third slide groove (5) opened on one side of the outer surface of the L-shaped slider (36). A second slider (51) is slidably connected inside the third slide groove (5). The second slider (51) is located on the side of the constriction roller (37) near the center of the constriction platform (33). A limiting roller (52) is rotatably connected on the side of the outer surface of the second slider (51) near the constriction roller (37). A second telescopic rod (53) is fixedly connected to one side of the inner wall of the third slide groove (5). The output end of the second telescopic rod (53) is fixedly connected to the second slider (51), and the contact surface between the output end of the second telescopic rod (53) and the second slider (51) is the side where the limiting roller (52) is set.

2. The tank necking and weld processing device according to claim 1, characterized in that: The clamping mechanism includes two fixed frames (2) that are slidably connected to the middle position of the upper surface of the U-shaped device body (1). A movable structure (21) is provided at the middle position of the upper surface of the U-shaped device body (1), and the movable structure (21) is connected to the two fixed frames (2) to drive the two fixed frames (2) to move. A circular through hole is provided at the center position of the two fixed frames (2). A first annular plate (22) is rotatably connected to the inner circular surface of the fixed frame (2). A first fixed clamp (23) is provided on the inner circular surface of the first annular plate (22). A rotating part is provided on the outer circular surface of the first annular plate (22) to drive the first annular plate (22) to rotate.

3. The tank necking and weld processing device according to claim 2, characterized in that: The drive unit includes an installation cavity (43) located at the center of the constricted platform (33). A second motor (44) is fixedly connected to one side of the installation cavity (43). A first bevel gear (45) is fixedly connected to the output end of the second motor (44). One end of each of the four threaded rods (47) passes through the installation cavity (43) and is fixedly connected to a second bevel gear (46). All four second bevel gears (46) mesh with the first bevel gear (45).

4. The tank necking and weld processing device according to claim 2, characterized in that: The four limiting blocks (48) are all located on the side of the four first sliders (41) away from the center of the narrowing platform (33), and the lower surface of the limiting block (48) and the side line of the narrowing roller (37) near the center of the narrowing platform (33) are on the same plane. The side line of the cylindrical positioning block (42) away from the center of the narrowing platform (33) and the upper surface of the first slider (41) are on the same plane.

5. The tank necking and weld processing device according to claim 2, characterized in that: The rotating part includes a first gear (24) fixedly connected to the outer surface of the first annular plate (22). A second gear (25) is meshed on one side of the outer surface of the first gear (24), and the second gear (25) is located inside the fixed frame (2). A first motor (26) is fixedly connected to one side of the outer surface of the fixed frame (2), and the output end of the first motor (26) is fixedly connected to the second gear (25).

6. The tank necking and weld processing device according to claim 1, characterized in that: The fixing mechanism includes a set of three telescopic rods (6) fixedly connected to both sides of the outer surface of the U-shaped device body (1), and the telescopic ends of the two sets of three telescopic rods (6) are fixedly connected to the moving plate (61) through the U-shaped device body (1). The two moving plates (61) have a placement groove (62) on the side of their outer surface near the constriction platform (33). The inner circular surface of the placement groove (62) is rotatably connected to a second annular plate (63), and a second fixing clamp (64) is provided inside the second annular plate (63).

7. The tank necking and weld processing device according to claim 6, characterized in that: The center of the inner wall of the placement groove (62) is provided with a fourth sliding groove (65). A cap-shaped abutment block (66) is slidably connected inside the fourth sliding groove (65). A rubber pad is fixedly connected to the outer surface of the cap-shaped abutment block (66) away from the fourth sliding groove (65). A clamping spring (67) is provided inside the cap-shaped abutment block (66).

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