Welding equipment for stainless steel strip rolled rectangular steel pipe

Abstract

The invention relates to the technical field of steel pipe welding, and particularly discloses a stainless steel strip rolled rectangular steel pipe welding device which comprises a workbench, a first sliding groove is formed in the top of the workbench, a second sliding groove is formed in the top of the workbench, and the interior of the second sliding groove is slidably connected with a bottom plate through a positioning sliding block; the top of the bottom plate is fixedly connected with a high-frequency welding machine; the bottom of the fixing device is fixedly connected with the top of the workbench; the bottom of the supporting device is fixedly connected with the bottom of the inner wall of the first sliding groove; the outer side of the smoke removal device is fixedly connected with the top of the workbench through a support. The fixing device comprises a positioning frame body, and the outer side of the positioning frame body is fixedly connected with a reinforcing rod through a bolt and nut assembly. According to the welding equipment for the stainless steel strip rolled rectangular steel pipe, steel pipes with different diameters can be clamped and fixed, and the stability of the steel pipes during machining is improved.

Description

Technical Field

[0001] This invention relates to the field of steel pipe welding technology, specifically to a welding device for rolling rectangular steel pipes from stainless steel strips. Background Technology

[0002] Rectangular steel pipes, especially thin-walled stainless steel rectangular pipes, are widely used in building decoration, rail transportation, furniture manufacturing, machinery frames, and high-end kitchen and bathroom products due to their excellent strength-to-weight ratio, beautiful modern appearance, and outstanding corrosion resistance. In modern industry, the continuous production of long-length, high-efficiency welded steel pipes mainly adopts the strip coiling-high-frequency welding process. The basic process flow is as follows: After uncoiling and leveling, the coiled cold-rolled steel strip is continuously fed into a precision multi-pass forming unit. In the forming unit, the strip steel is gradually bent and coiled through a series of rollers with specific hole patterns, ultimately forming a tubular blank with a longitudinally closed straight seam. Subsequently, this tube blank is introduced into the core equipment of the welding process—the high-frequency welding machine. The high-frequency welding machine utilizes the skin effect and proximity effect of high-frequency current. When the high-frequency current passes through the edge of the tube blank to be welded, the current is highly concentrated on the tip surface of the V-shaped opening. Due to the resistance of the metal itself, this narrow area is instantly heated to a plastic or molten state. Next, the tube blank passes through a pair of precisely configured extrusion rollers. Under immense pressure, the heated metal edges are forged together to form a strong weld, achieving solid-state welding of the metals. The welded tube then undergoes processes such as deburring, cooling, sizing and straightening, and cutting to length to become the final product.

[0003] Chinese patent CN212264859U discloses a high-frequency welding machine technology for steel pipe welding, and discloses a high-frequency welding machine for steel pipe welding. The high-frequency welding machine includes a rectangular plate fixedly connected to the lower right side. A support rod is fixedly connected to both the front and rear ends of the upper surface of the rectangular plate. In this high-frequency welding machine for steel pipe welding, two steel pipes are first placed on two arc-shaped support plates. When the steel pipe to be welded is long, two circular clamping rods are pulled outwards, causing the inner ends of the two circular clamping rods to disengage from the circular clamping holes on the two rectangular plates. Then, the two rectangular plates are pulled out from the rectangular plate. This allows the user to place both ends of the steel pipe on the arc-shaped support plate on the rectangular plate and the arc-shaped support plate on the rectangular plate, respectively. Therefore, when welding the steel pipe, the user does not need to support the weight of the steel pipe by hand; they only need to rotate the steel pipe, thus facilitating the welding process. When using a high-frequency welding machine to weld steel pipes, the device cannot clamp and fix rectangular steel pipes of different diameters, causing the steel pipes to easily shake and fall off, thus affecting the entire processing. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides: a welding device for rolling stainless steel strip into rectangular steel pipes, comprising: The workbench has a first sliding groove on its top and a second sliding groove on its top. A base plate is slidably connected to the inside of the second sliding groove via a positioning slider. A high-frequency welding machine is fixedly connected to the top of the base plate. A fixing device, the bottom of which is fixedly connected to the top of the workbench; A support device, the bottom of which is fixedly connected to the bottom of the inner wall of the first sliding groove; A smoke removal device, the outer side of which is fixedly connected to the top of the workbench via a bracket; The fixing device includes: A positioning frame is provided, with a reinforcing rod fixedly connected to its outer side by a bolt and nut assembly. A limiting plate is fixedly connected to the outer side of the positioning frame. A first electric slide rail is fixedly connected to the side of the limiting plate away from the positioning frame. A sliding plate is slidably connected to the inside of the first electric slide rail by an electric slider. The extrusion roller has a moving rod rotatably connected to one end via a bearing. The first electric slide rail drives the sliding plate to move via its internal electric slider. The sliding plate drives the extrusion roller to move via the moving rod. Multiple sets of extrusion rollers simultaneously extrude rectangular steel pipes from four sides, thus clamping the steel pipes. The extrusion rollers maintain the extrusion of the steel pipes while they are moving, which can clamp and fix steel pipes of different diameters and improve the stability of the steel pipes during processing.

[0005] Preferably, multiple sets of reinforcing rods are provided, and the multiple sets of reinforcing rods are symmetrically distributed on both sides of the positioning frame. The positioning frame is provided with multiple sets of rods, and two sets of moving rods are provided, and the two sets of moving rods are symmetrically distributed at both ends of the extrusion roller.

[0006] Preferably, the end of the moving rod away from the extrusion roller is fixedly connected to one side of the sliding plate, and multiple sets of extrusion rollers are provided, which are evenly distributed on the outside of the positioning frame.

[0007] Preferably, the support device includes a second electric slide rail. A sliding base plate is slidably connected inside the second electric slide rail via an electric slider. An electric telescopic rod is fixedly connected to the side of the sliding base plate away from the second electric slide rail. A limit frame is fixedly connected to the movable end of the electric telescopic rod. A support roller is rotatably connected to the top of the limit frame via a bearing. The electric slider inside the second electric slide rail drives the sliding base plate to move. When the sliding base plate moves, it drives the electric telescopic rod to move. The electric telescopic rod drives the support roller to move through the limit frame, thereby moving the support roller to a suitable position to support the bottom of the steel pipe. This supports longer steel pipes and further prevents the steel pipe from swaying. The movable end of the electric telescopic rod drives the support roller to move through the limit frame, changing the position of the support roller, thus supporting steel pipes of different diameters and effectively improving the adaptability of the device.

[0008] Preferably, the sliding base plate is provided in two sets, and the two sets of sliding base plates are symmetrically distributed on the second electric slide rail.

[0009] Preferably, the bottom of the second electric slide rail is fixedly connected to the bottom of the inner wall of the first slide groove, and a rubber pad is sleeved and fixedly connected to the outer side of the support roller.

[0010] Preferably, the smoke removal device includes an air pump, the air pump's inlet end is connected to an extension pipe, the end of the extension pipe away from the air pump is connected to a dust collection cylinder, the end of the dust collection cylinder away from the extension pipe is connected to a distribution plate, the side of the distribution plate away from the dust collection cylinder is connected to a suction pipe, one end of the extension pipe extends into the interior of the dust collection cylinder and is fixedly connected to a filter screen. The fumes generated at the welding point are drawn into the suction pipe and then discharged into the distribution plate through the suction pipe. The fumes enter the interior of the dust collection cylinder through the distribution plate. Since a filter screen is provided at one end of the extension pipe, the filter screen can filter out the dust and impurities contained in the fumes, leaving the impurities in the dust collection cylinder. This allows for timely absorption of the fumes generated during welding and provides preliminary filtration treatment of the absorbed fumes.

[0011] Preferably, the bottom of the air pump is fixedly connected to the top of the workbench via a bracket, and a material inlet is provided on the outer side of the dust collection cylinder.

[0012] Preferably, the outer side of the dust collection cylinder is fixedly connected to the top of the workbench via a bracket, and multiple sets of suction pipes are provided, with the multiple sets of suction pipes evenly distributed on one side of the distribution plate.

[0013] This invention provides a welding device for rolling stainless steel strip into rectangular steel pipes. It has the following advantages: 1. The welding equipment for rolling rectangular steel pipes from stainless steel strips, through the installation of a fixing device, has multiple sets of extrusion rollers distributed on the four sides of the rectangular steel pipe. When the first electric slide rail is activated, the electric slider inside it drives the sliding plate to move. The sliding plate drives the extrusion rollers to move through the moving rod. Multiple sets of extrusion rollers simultaneously extrude the rectangular steel pipe from four sides, thus clamping the steel pipe. The extrusion rollers continue to extrude pressure on the steel pipe while it is moving. This equipment can clamp and fix steel pipes of different diameters and improve the stability of the steel pipe during processing.

[0014] 2. The welding equipment for rolling rectangular steel pipes with stainless steel strips, through the installation of the support device, the electric slider inside the second electric slide rail drives the sliding base plate to move. When the sliding base plate moves, it drives the electric telescopic rod to move. The electric telescopic rod drives the support roller to move through the limit frame, and then moves the support roller to a suitable position to support the bottom of the steel pipe. For longer steel pipes, this further prevents the steel pipe from shaking.

[0015] 3. The welding equipment for rolling rectangular steel pipes from stainless steel strips, through the installation of an electric telescopic rod and a support roller, allows the movable end of the electric telescopic rod to drive the support roller to move via a limit frame, changing the position of the support roller and thus supporting steel pipes of different diameters, effectively improving the adaptability of the device.

[0016] 4. The welding equipment for rolling rectangular steel pipes with stainless steel strips, through the installation of a fume extraction device, uses an air pump to draw the fumes generated at the welding point into the suction pipe, and then discharges them into a distribution plate through the suction pipe. The fumes then enter the dust collection cylinder through the distribution plate. Since a filter screen is installed at one end of the extension pipe, the filter screen can filter out the dust and impurities contained in the fumes, leaving the impurities in the dust collection cylinder. This allows for the timely absorption of the fumes generated during welding and provides preliminary filtration treatment for the absorbed fumes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the welding equipment for rolling stainless steel strip into rectangular steel pipes according to the present invention. Figure 2 This is a schematic diagram of the structure of the workbench of the present invention; Figure 3 This is a schematic diagram of the high-frequency welding machine of the present invention; Figure 4 This is a schematic diagram of the positioning frame of the present invention; Figure 5 This is a schematic diagram of the reinforcing rod of the present invention; Figure 6 This is a schematic diagram of the structure of the extrusion roller of the present invention; Figure 7 This is a schematic diagram of the structure of the sliding base plate of the present invention; Figure 8 This is a schematic diagram of the structure of the flow divider of the present invention; Figure 9 This is a schematic diagram of the internal structure of the dust collection cylinder of the present invention.

[0018] In the diagram: 1. Workbench; 2. First slide rail; 3. Second slide rail; 4. Base plate; 5. High-frequency welding machine; 6. Fixing device; 61. Positioning frame; 62. Reinforcing rod; 63. Limiting plate; 64. First electric slide rail; 65. Sliding plate; 66. Extrusion roller; 67. Moving rod; 7. Support device; 71. Second electric slide rail; 72. Sliding base plate; 73. Electric telescopic rod; 74. Limiting frame; 75. Support roller; 8. Smoke removal device; 81. Air pump; 82. Extension pipe; 83. Dust collection cylinder; 84. Diverter plate; 85. Suction pipe; 86. Filter screen. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] For the first embodiment, please refer to... Figures 1-7 This invention provides a technical solution: a welding device for rolling stainless steel strip into rectangular steel pipes, comprising: Workbench 1, with a first slide groove 2 and a second slide groove 3 on the top of the workbench 1. The interior of the second slide groove 3 is slidably connected to a base plate 4 via a positioning slider. A high-frequency welding machine 5 is fixedly connected to the top of the base plate 4. Fixing device 6, the bottom of fixing device 6 is fixedly connected to the top of workbench 1; Support device 7, the bottom of support device 7 is fixedly connected to the bottom of the inner wall of the first slide groove 2; The smoke removal device 8 is fixedly connected to the top of the workbench 1 via a bracket on its outer side. The fixing device 6 includes: The positioning frame 61 has a reinforcing rod 62 fixedly connected to its outer side by a bolt and nut assembly. A limiting plate 63 is fixedly connected to the outer side of the positioning frame 61. A first electric slide rail 64 is fixedly connected to the side of the limiting plate 63 away from the positioning frame 61. A sliding plate 65 is slidably connected inside the first electric slide rail 64 by an electric slider. The extrusion roller 66 has a movable rod 67 rotatably connected to one end of it via a bearing.

[0021] Multiple sets of reinforcing rods 62 are provided, and the multiple sets of reinforcing rods 62 are symmetrically distributed on both sides of the positioning frame 61. The positioning frame 61 is provided with multiple sets of reinforcing rods 62. Two sets of moving rods 67 are provided, and the two sets of moving rods 67 are symmetrically distributed at both ends of the extrusion roller 66.

[0022] The end of the moving rod 67 away from the extrusion roller 66 is fixedly connected to one side of the sliding plate 65. Multiple sets of extrusion rollers 66 are provided, and the multiple sets of extrusion rollers 66 are evenly distributed on the outside of the positioning frame 61.

[0023] The support device 7 includes a second electric slide rail 71. Inside the second electric slide rail 71, a sliding base plate 72 is slidably connected via an electric slider. An electric telescopic rod 73 is fixedly connected to the side of the sliding base plate 72 away from the second electric slide rail 71. A limit frame 74 is fixedly connected to the movable end of the electric telescopic rod 73. A support roller 75 is rotatably connected to the top of the limit frame 74 via a bearing.

[0024] Two sets of sliding base plates 72 are provided, and the two sets of sliding base plates 72 are symmetrically distributed on the second electric slide rail 71.

[0025] The bottom of the second electric slide rail 71 is fixedly connected to the bottom of the inner wall of the first slide groove 2, and a rubber pad is sleeved and fixedly connected to the outer side of the support roller 75.

[0026] In use, the operator uses an external robotic arm to pull the rectangular steel pipe to be welded into the positioning frame 61, and uses an external feeding mechanism to continuously push the steel pipe into the positioning frame 61, so that the steel pipe to be welded passes through the welding point of the high-frequency welding machine 5 and enters the second set of positioning frames 61. Then, the steel pipe is continuously pushed to move, and at the same time, the high-frequency welding machine 5 is turned on, and the high-frequency welding machine 5 can perform welding on the passing steel pipe. When the steel pipe enters the positioning frame 61, the steel pipe first rests on the extrusion rollers 66 at the bottom of the positioning frame 61. Since there are multiple sets of extrusion rollers 66 and they are distributed on the four sides of the rectangular steel pipe, the first electric slide rail 64 is turned on, and the sliding plate 65 is moved by the electric slider inside. The sliding plate 65 drives the extrusion rollers 66 to move through the moving rod 67. Multiple sets of extrusion rollers 66 extrude the rectangular steel pipe from four sides at the same time, which can clamp the steel pipe. When the steel pipe moves, the extrusion rollers 66 still maintain the extrusion on the steel pipe, which can clamp and fix steel pipes of different diameters and improve the stability of the steel pipe during processing.

[0027] The second electric slide rail 71 is activated, and the electric slider inside the second electric slide rail 71 drives the sliding base plate 72 to move. When the sliding base plate 72 moves, it drives the electric telescopic rod 73 to move. The electric telescopic rod 73 drives the support roller 75 to move through the limit frame 74. Then, the support roller 75 is moved to a suitable position to support the bottom of the steel pipe. This supports the longer steel pipe and further prevents the steel pipe from shaking.

[0028] When the electric telescopic rod 73 is activated, the movable end of the electric telescopic rod 73 drives the support roller 75 to move through the limit frame 74, changing the position of the support roller 75, thereby supporting steel pipes of different diameters and effectively improving the adaptability of the device.

[0029] For the second embodiment, please refer to... Figures 1-9 The present invention provides a technical solution: Based on the first embodiment, the smoke removal device 8 includes an air pump 81, the air inlet end of the air pump 81 is connected to an extension pipe 82, the end of the extension pipe 82 away from the air pump 81 is connected to a dust collection cylinder 83, the end of the dust collection cylinder 83 away from the extension pipe 82 is connected to a diverter plate 84, the side of the diverter plate 84 away from the dust collection cylinder 83 is connected to a suction pipe 85, and one end of the extension pipe 82 extends into the interior of the dust collection cylinder 83 and is fixedly connected to a filter screen 86.

[0030] The bottom of the air pump 81 is fixedly connected to the top of the workbench 1 via a bracket, and a material inlet is provided on the outside of the dust collection cylinder 83.

[0031] The outer side of the dust collection cylinder 83 is fixedly connected to the top of the workbench 1 via a bracket. Multiple sets of suction pipes 85 are provided, and the multiple sets of suction pipes 85 are evenly distributed on one side of the distribution plate 84.

[0032] When the high-frequency welding machine 5 is welding a steel pipe, the suction pump 81 is turned on. The suction pump 81 draws the fumes generated at the welding point into the suction pipe 85, and then discharges them into the distribution plate 84 through the suction pipe 85. The fumes then enter the dust collection cylinder 83 through the distribution plate 84. Since a filter screen 86 is provided at one end of the extension pipe 82, the filter screen 86 can filter out the dust and impurities contained in the fumes, leaving the impurities in the dust collection cylinder 83. This allows the fumes generated during welding to be absorbed in a timely manner and to perform preliminary filtration treatment on the absorbed fumes.

[0033] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A welding device for rolling rectangular steel pipes from stainless steel strip, characterized in that, include: A workbench (1) is provided with a first slide groove (2) on the top of the workbench (1) and a second slide groove (3) on the top of the workbench (1). A base plate (4) is slidably connected inside the second slide groove (3) by a positioning slider. A high-frequency welding machine (5) is fixedly connected to the top of the base plate (4). Fixing device (6), the bottom of which is fixedly connected to the top of the workbench (1); Support device (7), the bottom of which is fixedly connected to the bottom of the inner wall of the first slide groove (2); The smoke removal device (8) is fixedly connected to the top of the workbench (1) via a bracket on its outer side; The fixing device (6) includes: A positioning frame (61) is provided, with a reinforcing rod (62) fixedly connected to the outside of the positioning frame (61) by a bolt and nut assembly. A limiting plate (63) is fixedly connected to the outside of the positioning frame (61). A first electric slide rail (64) is fixedly connected to the side of the limiting plate (63) away from the positioning frame (61). A sliding plate (65) is slidably connected inside the first electric slide rail (64) by an electric slider. An extrusion roller (66) has a moving rod (67) rotatably connected to one end of the extrusion roller (66) via a bearing.

2. The welding equipment for rolling stainless steel strip into rectangular steel pipes according to claim 1, characterized in that: The reinforcing rods (62) are provided in multiple sets, and the multiple sets of reinforcing rods (62) are symmetrically distributed on both sides of the positioning frame (61). The positioning frame (61) is provided in multiple sets, and the moving rods (67) are provided in two sets, and the two sets of moving rods (67) are symmetrically distributed at both ends of the extrusion roller (66).

3. The welding equipment for rolling stainless steel strip into rectangular steel pipes according to claim 1, characterized in that: The end of the moving rod (67) away from the extrusion roller (66) is fixedly connected to one side of the sliding plate (65). The extrusion roller (66) is provided in multiple sets, and the multiple sets of extrusion rollers (66) are evenly distributed on the outside of the positioning frame (61).

4. The welding equipment for rolling stainless steel strip into rectangular steel pipes according to claim 1, characterized in that: The support device (7) includes a second electric slide rail (71), and a sliding base plate (72) is slidably connected inside the second electric slide rail (71) via an electric slider. An electric telescopic rod (73) is fixedly connected to the side of the sliding base plate (72) away from the second electric slide rail (71). A limit frame (74) is fixedly connected to the movable end of the electric telescopic rod (73). A support roller (75) is rotatably connected to the top of the limit frame (74) via a bearing.

5. The welding equipment for rolling stainless steel strip into rectangular steel pipes according to claim 4, characterized in that: The sliding base plate (72) is provided in two sets, and the two sets of sliding base plates (72) are symmetrically distributed on the second electric slide rail (71).

6. The welding equipment for rolling stainless steel strip into rectangular steel pipes according to claim 4, characterized in that: The bottom of the second electric slide rail (71) is fixedly connected to the bottom of the inner wall of the first slide groove (2), and a rubber pad is sleeved and fixedly connected to the outside of the support roller (75).

7. The welding equipment for rolling stainless steel strip into rectangular steel pipes according to claim 1, characterized in that: The smoke removal device (8) includes an air pump (81), the air inlet of the air pump (81) is connected to an extension pipe (82), the end of the extension pipe (82) away from the air pump (81) is connected to a dust collection cylinder (83), the end of the dust collection cylinder (83) away from the extension pipe (82) is connected to a diverter plate (84), the side of the diverter plate (84) away from the dust collection cylinder (83) is connected to an air suction pipe (85), and one end of the extension pipe (82) extends into the interior of the dust collection cylinder (83) and is fixedly connected to a filter screen (86).

8. The welding equipment for rolling stainless steel strip into rectangular steel pipes according to claim 7, characterized in that: The bottom of the air pump (81) is fixedly connected to the top of the workbench (1) via a bracket, and the dust collection cylinder (83) has a material inlet on its outer side.

9. The welding equipment for rolling stainless steel strip into rectangular steel pipes according to claim 7, characterized in that: The outer side of the dust collection cylinder (83) is fixedly connected to the top of the workbench (1) through a bracket. Multiple sets of suction pipes (85) are provided, and the multiple sets of suction pipes (85) are evenly distributed on one side of the distribution plate (84).

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