A longitudinal seam welding apparatus for a steel drum body

Abstract

This invention relates to the field of seam welding technology, specifically to a welding device for longitudinal seams of steel drum bodies. The device includes a rolling welding head, an outer diameter positioning roller, and a transfer frame. A curling positioning component, located below the rolling welding head, bends half of the steel plate into a circle and positions the overlapping edge of the curved circular portion. A pressing positioning component, located below the curling positioning component, presses the remaining straight portion of the steel plate in a rotating manner and positions the overlapping edge of the straight portion. Unlike traditional guide rail positioning methods, the positioning process of this device is performed simultaneously during the bending process of the steel plate. This eliminates the need for constant detection and control during guide rail movement, simplifying the operation process, reducing the time spent on positioning, and avoiding the time waste and path redundancy caused by separating positioning and bending in traditional methods. This makes the entire process from transfer to bending positioning of the steel plate more seamless, significantly improving overall production efficiency and reducing time costs in the production process.

Description

Technical Field

[0001] This invention relates to the field of seam welding technology, specifically to a welding device for longitudinal seams of steel drum bodies. Background Technology

[0002] Steel drums can be used to store various liquids. In the manufacturing process, cut steel plates are wrapped around to form a drum, and the joints are welded to form the drum body. Before wrapping, the two sides of the weld need to be thinned. When overlapping, the two sides partially overlap and are welded at the overlapping position. Resistance welding is commonly used, and the welding is done by rolling. With the help of automatic feeding equipment, it has a high degree of automation.

[0003] Before welding the steel drum body, the two sides need to be overlapped and aligned using a mechanical positioning system. The core of this system consists of guide rails, waist drum wheels, and outer diameter positioning rollers, along with precise conveying control to ensure a uniform and stable overlap. Therefore, after feeding, the drum is generally conveyed for a certain distance, and the guide rails are used to allow the edges of the steel plates to automatically overlap before welding is completed under restrictive conditions.

[0004] After welding, steel drums need to be expanded and reinforced in a rib-expanding machine. The accuracy of the overlap of the lap edges affects the expansion and reinforcement process. Therefore, the current requirements for the overlap control accuracy of the lap edges are relatively high. In existing technology, PLC program control is used. First, the drum is rolled by a rolling machine, then positioned once, and then the lap edge is positioned by a slide rail. Positioning rollers, waist drum wheels, etc. are used for auxiliary positioning to ensure that the overlapping area of ​​the lap edge forms a rectangle with the drum body. That is, the edge of the drum body after overlap is neat and the diameter of the drum body is appropriate. Under this process, it is highly dependent on the slide rail to restrict and position the drum body. The positioning path is long and the control conditions are few, which has certain room for improvement. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a welding equipment for longitudinal weld seams of steel drum body, which can effectively solve the problem of long positioning path in the existing process.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a welding device for longitudinal weld seams of steel drum bodies, including a roll welding head, an outer diameter positioning roller, and a transfer frame, and further comprising: The curling positioning component, located below the roll welding head, bends half of the steel plate into a circle and positions the edge overlap of the bent circular part of the steel plate. The pressing and positioning components are located below the curling and positioning components. They press the remaining straight part of the steel plate in a rotating manner and position the edge overlap of the straight part of the steel plate. The top plate assembly, located above the pressing and positioning assembly and corresponding to the position of the rotating pressing and positioning assembly, helps the steel plate bend, and the degree of bending of the steel plate can be adjusted by adjusting the position of the top plate assembly.

[0007] Furthermore, the coiling positioning assembly includes an arc-shaped guide plate and a flat support plate, the flat support plate being matched with the transfer frame, and the steel plate moving from the transfer frame to the flat support plate; The end of the arc-shaped guide plate has a rotatable L-shaped baffle and a liftable insert plate. The L-shaped baffle is used to block the side edge of the bent part of the steel plate. After the insert plate moves down, it presses down on the bent part of the steel plate and blocks the side edge of the steel plate after it is bent on the other side.

[0008] Furthermore, there are several arc-shaped guide plates that are staggered. An L-shaped baffle is rotatably connected to the arc-shaped guide plates located at the two side edges. A motor for driving the L-shaped baffle to rotate is fixedly installed on both sides of the two arc-shaped guide plates. An arc-shaped guide plate is fixedly connected to the inner diameter of the arc-shaped guide plate, which together with the arc-shaped guide plate restricts the movement path of the steel plate.

[0009] Furthermore, an electric push rod is fixedly mounted on the arc-shaped guide plate by a mounting base, and the insert plate is fixedly mounted on the moving shaft of the electric push rod, and the insert plate is vertically slidably inserted into the arc-shaped guide plate.

[0010] Furthermore, the curling positioning assembly also includes a second motor and a drive roller driven by the second motor. The drive roller is located above the junction of the arc-shaped guide plate and the flat support plate, contacts the steel plate and drives the steel plate to slide toward the flat support plate, and is guided by the flat support plate to bend.

[0011] Furthermore, the pressing and positioning assembly includes multiple arc-shaped pressing plates that are staggered with the arc-shaped guide plate. The tops of the multiple arc-shaped pressing plates are rotatably connected to overlapping edge pressing plates. A blocking plate is fixedly connected to the end edge of the overlapping edge pressing plate. Two arc-shaped pressing plates located on both sides are fixedly connected to motors that are fixedly connected to the overlapping edge pressing plates, which can drive the overlapping edge pressing plates to rotate.

[0012] Furthermore, it also includes a motor three, and the ends of the multiple arc-shaped pressing plates are fixedly connected to a rotating shaft, and the rotating shaft is rotatably connected to the multiple arc-shaped guide plates one, and the motor three is fixedly connected to the rotating shaft; Two arc-shaped pressing plates located on both sides are fixedly connected to the side walls of a motor, and the motor is driven by a rotating drum, which is rotatably connected to the middle position of the arc-shaped pressing plates.

[0013] Furthermore, the top plate assembly includes a mounting bracket fixed to the top of the support platform. A fixing plate is fixedly connected to the side of the mounting bracket, and an electric push rod II is fixedly connected to the fixing plate. The drive shaft of the electric push rod II is fixedly connected to the arc-shaped top plate, and the extension and retraction of the electric push rod II can adjust the position of the arc-shaped top plate and the arc-shaped pressing plate jointly clamping the steel plate.

[0014] Furthermore, it also includes a support platform, wherein motors two and three are fixed on the top of the support platform, and arc-shaped guide plate one and flat support plate are both fixedly installed on the top of the support platform; The outer diameter positioning roller is placed on the outlet side of the barrel body to assist in positioning the outer diameter of the barrel body.

[0015] The technical solution provided by this invention has the following advantages compared with the known prior art: 1. Unlike traditional guide rail positioning methods, the positioning process of this device is carried out simultaneously during the bending of the steel plate. There is no need for constant detection and control during the movement of the guide rail, which simplifies the operation process, reduces the time consumption of the positioning link, and avoids the time waste and path redundancy caused by the separation of positioning and bending in the traditional method. This makes the whole process of steel plate from transfer to bending positioning more continuous, greatly improves the overall production efficiency, reduces the time cost in the production process, and is suitable for the efficient production of batch steel drums.

[0016] 2. The curling positioning component and the pressing positioning component work together to achieve precise positioning during the bending process of the steel plate. This not only controls the bending of the steel plate but also precisely controls the overlapping position of the lap edge, avoiding the problems of lap edge offset and insufficient overlap in traditional positioning methods. The use of baffles and inserts, along with the auxiliary detection of sensors, can conveniently and stably determine the position of the steel plate lap edge, preventing the steel plate from shifting under elasticity. After welding, the edge of the barrel is neat and flat, effectively improving the strength and aesthetics of the weld and solving the weld quality problems caused by insufficient lap precision in traditional welding.

[0017] 3. During the movement of the steel plate towards the roll forming welding head, the outer diameter positioning roller limits the outer diameter of the drum by contacting the steel plate. It also acts as a limiter, preventing the steel plate from shifting position during welding, ensuring accurate weld positioning, and avoiding welding defects caused by weld misalignment. This improves the sealing performance and structural strength of the steel drum. Simultaneously, the coordinated operation of all components prevents additional bending of the steel plate during bending and positioning, protecting its original properties. Combined with the high strength and high plasticity of low-carbon thin steel plates, the finished steel drum meets both dimensional requirements and excellent performance, compensating for the poor corrosion resistance of low-carbon thin steel plates and extending the service life of the steel drum. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This is a schematic diagram of the overall right rear side structure of the present invention; Figure 2 This is a schematic diagram of the overall left front side structure of the present invention; Figure 3 This is a schematic diagram of the structure of the support platform and the curling positioning component of the present invention; Figure 4 This is a schematic diagram of the rear side of the pressing and positioning component structure of the present invention; Figure 5 This is a schematic diagram of the curling positioning component and the pressing positioning component of the present invention; Figure 6 This is a schematic diagram of the top end of the arc-shaped guide plate of the present invention; Figure 7 This is a schematic diagram of the pressing and positioning component of the present invention; Figure 8 This is a schematic diagram of the top structure of the arc-shaped pressing plate of the present invention; Figure 9 This is a schematic diagram of the top plate assembly of the present invention.

[0020] The labels in the diagram represent: 1. Roller welding head; 2. Outer diameter positioning roller; 3. Transfer frame; 4. Bearing platform; 5. Curling positioning assembly; 501. Arc-shaped guide plate one; 502. L-shaped baffle; 503. Motor one; 504. Insert plate; 505. Electric push rod one; 506. Flat support plate; 507. Drive roller; 508. Motor two; 509. Arc-shaped guide plate two; 6. Pressing positioning assembly; 601. Arc-shaped pressing plate; 602. Motor three; 603. Overlapping edge pressure plate; 604. Blocking plate; 605. Motor four; 606. Rotary drum; 7. Top plate assembly; 701. Arc-shaped top plate; 702. Fixing plate; 703. Electric push rod two; 704. Mounting frame. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] The present invention will be further described below with reference to embodiments.

[0023] Reference Figures 1 to 9 Example: A welding device for longitudinal seams of a steel drum body includes a roll welding head 1, an outer diameter positioning roller 2, a transfer frame 3, a support platform 4, a second motor 508, and a third motor 602, both fixed to the top of the support platform 4. An arc-shaped guide plate 501 and a straight support plate 506 are also fixedly installed on the top of the support platform 4. The outer diameter positioning roller 2 is positioned on the outlet side of the drum body to assist in positioning the outer diameter of the drum body. It also includes: a curling positioning component 5, located below the roll welding head 1, which bends half of the steel plate into a circle and positions the edge overlap of the curved circular part of the steel plate; a pressing positioning component 6, located below the curling positioning component 5, which presses the remaining straight part of the steel plate in a rotating manner and positions the edge overlap of the straight part of the steel plate; and a top plate component 7, located above the pressing positioning component 6 and corresponding to the position of the rotating pressing positioning component 6, which helps the steel plate bend and allows the degree of bending of the steel plate to be adjusted by adjusting the position of the top plate component 7.

[0024] The steel drum is made of low-carbon thin steel plate, which has the characteristics of high strength, high plasticity and easy processing. After painting, the shortcoming of poor corrosion resistance can be made up. After the steel drum is rolled, the two sides are welded together by roll welding. After being expanded and ribbed by the expansion machine, the drum body is roughly completed. After painting and installing the bottom and lid, the overall production process of the steel drum is completed.

[0025] During the welding process, resistance welding is used to weld the two edges of the steel plate together by rolling. Before welding, the two edges need to be ground to ensure the welding effect and the thickness after welding. The steel plate is placed on the transfer frame 3 and is pushed towards the curling and positioning component 5 by a conveyor belt or push rod. Under the guidance of the curling and positioning component 5, more than half of the steel plate is bent into a circle, and the side edge of the steel plate is positioned. That is, half of the steel barrel body is completed first. The other half is pressed and positioned by the pressing and positioning component 6 in a rotating manner, and the edge of the steel plate in this part is positioned. The barrel body is positioned and, after bending upwards, the two side edges overlap. After being rolled and welded by the roll welding head 1, the welding process of the barrel body is completed. The curling positioning component 5 and the pressing positioning component 6 work together to complete the bending of the barrel body and the positioning of the edges. To a certain extent, this can shorten the preparation time before welding and shorten the movement path. Unlike the guide rail positioning method, the positioning is carried out during the bending process. It does not require constant detection and control during the movement on the guide rail. The bending condition and the overlapping position are controllable, and the accuracy can be guaranteed in terms of the overlap accuracy of the overlapping edges.

[0026] After the steel barrel is bent and the overlapping edge is positioned, the circular steel plate is pushed by a conveyor belt or push rod towards the rolling welding head 1. When passing the outer diameter positioning roller 2, the outer diameter of the steel plate is limited by the outer diameter positioning roller 2, and the weld seam is prevented from shifting during welding by contacting the steel plate.

[0027] It should be noted that the coiling positioning component 5 and the pressing positioning component 6, and other related components, are all fixed at one end to one side. The steel plate is coiled on one side of the fixed side. The coiled steel plate will not be blocked by the coiling positioning component 5 and the pressing positioning component 6, and the steel plate should be located inside the coiling positioning component 5 and the pressing positioning component 6.

[0028] Specifically, the coiling positioning component 5 includes an arc-shaped guide plate 501 and a flat support plate 506. The flat support plate 506 is matched with the transfer frame 3, and the steel plate moves from the transfer frame 3 onto the flat support plate 506. The end of the arc-shaped guide plate 501 has a rotatable L-shaped baffle 502 and a liftable insert plate 504. The L-shaped baffle 502 is used to block the side edge of the bent part of the steel plate. After the insert plate 504 moves down, it presses down the bent part of the steel plate and blocks the side edge of the steel plate after bending on the other side. An arc-shaped guide plate 509 is fixedly connected to the inner diameter of the arc-shaped guide plate 501, which together with the arc-shaped guide plate 501 restricts the movement path of the steel plate.

[0029] The first arc-shaped guide plate 501 is semi-circular. The second arc-shaped guide plate 509 extends upward from the position of the drive roller 507, with a certain gap between its top and the top of the first arc-shaped guide plate 501. Below the first arc-shaped guide plate 501, an arc-shaped plate-like support is required. The middle position of this support corresponds to the top end position of the first arc-shaped guide plate 501, and it is used to support the overlapping edge of the steel plate. An L-shaped baffle 502 and an insert plate 504 are installed on the top edge. The L-shaped baffle 502 can be installed only on the two arc-shaped guide plates 501 near the outer edge to restrict the two corner positions at the edge of the steel plate, or the L-shaped baffle 502 can be installed on all the arc-shaped guide plates 501. The lower edge of the L-shaped baffle 502 should extend a certain distance beyond the inner diameter of the first arc-shaped guide plate 501 to ensure that the position of the steel plate is restricted. When the L-shaped baffle 502 is in a vertical position, the insert plate 504 is in a high position. The steel plate does not extend to the inner diameter of the arc-shaped guide plate 501. After the steel plate gradually bends upward along the inner diameter of the arc-shaped guide plate 501 and contacts the L-shaped baffle 502, the electric push rod 505 can drive the insert plate 504 to move downward and press it onto the steel plate. However, it should not excessively compress the steel plate to avoid additional bending. The downward-moving insert plate 504 can block the overlapping edge of the remaining straight part of the steel plate when pressing the positioning component 6 to bend it, so as to ensure the overlapping area of ​​the overlapping edges on both sides. A capacitive sensor or an inductive proximity switch can be added to the part of the L-shaped baffle 502 that contacts the steel plate to detect whether the side of the steel plate is in place. If it is not in place, the steel plate needs to be continuously driven to move. Once the overlapping edge of the steel plate is in place, the driving of the steel plate is stopped. In this way, the position of the overlapping edge on one side of the steel plate can be conveniently and stably determined.

[0030] Specifically, there are several arc-shaped guide plates 501 distributed in an alternating manner. L-shaped baffles 502 are rotatably connected to the arc-shaped guide plates 501 located at the two edge positions. Motors 503 for driving the L-shaped baffles 502 to rotate are fixedly installed on both sides of the two arc-shaped guide plates 501. Electric push rods 505 are fixedly installed on the arc-shaped guide plates 501 through mounting seats. Insert plates 504 are fixedly installed on the moving shaft of the electric push rods 505 and are vertically slidably inserted into the arc-shaped guide plates 501.

[0031] After the L-shaped baffle 502 restricts the bending of the steel plate, the motor 503 drives the L-shaped baffle 502 to rotate upward, allowing the overlapping edge of the steel plate on the other side to slide in, insert, or press in. Simultaneously, the electric push rod 505 should be controlled to drive the insert plate 504 to move downward, restricting the position of the overlapping edge of the steel plate on the other side while pressing down the bent steel plate. By utilizing the friction between the steel plate and the bottom of the insert plate 504, the positional displacement of the steel plate under its own elasticity is reduced, thereby ensuring the accuracy of the overlapping edge and ensuring that the edge of the barrel is neat and flat after welding.

[0032] When using a conveyor belt or pusher to push the rolled steel plate into a circle, the electric pusher 505 should drive the insert plate 504 to move upward to avoid affecting the linear movement of the steel plate.

[0033] Specifically, the curling positioning assembly 5 also includes a second motor 508 and a drive roller 507 driven by the second motor 508. The drive roller 507 is located above the junction of the arc-shaped guide plate 501 and the flat support plate 506, contacts the steel plate and drives the steel plate to slide towards the flat support plate 506, and is guided by the flat support plate 506 to bend.

[0034] As the steel plate bends upward along the arc-shaped guide plate 501, the drive roller 507 is driven to rotate by the motor 508. Through the contact between the drive roller 507 and the steel plate, the steel plate continues to move upward. Moreover, when the pressing positioning component 6 bends the remaining half of the steel plate, the motor 508 stops and locks itself. The non-rotating drive roller 507 contacts the steel plate to limit the displacement of the steel plate, so that the remaining half of the steel plate cannot move during the bending process.

[0035] Specifically, the pressing and positioning component 6 includes multiple arc-shaped pressing plates 601 that are staggered with the arc-shaped guide plate 501. The tops of the multiple arc-shaped pressing plates 601 are rotatably connected to overlapping edge pressing plates 603. A blocking plate 604 is fixedly connected to the end edge of the overlapping edge pressing plate 603. Two arc-shaped pressing plates 601 located on both sides are fixedly connected to motors 605 that are fixedly connected to the overlapping edge pressing plates 603, which can drive the overlapping edge pressing plates 603 to rotate.

[0036] Furthermore, it also includes a motor 602, and the ends of multiple arc-shaped pressing plates 601 are fixedly connected to a rotating shaft, which is rotatably connected to multiple arc-shaped guide plates 501, and the motor 602 is fixedly connected to the rotating shaft; the side walls of the two arc-shaped pressing plates 601 located on both sides are fixedly connected to a motor 605, and the motor 605 is driven by a rotating cylinder 606, which is rotatably connected to the middle position of the arc-shaped pressing plate 601.

[0037] Motor 602 serves as the power source, driving the arc-shaped pressing plate 601 to rotate upwards. This, in conjunction with the top plate assembly 7, causes the remaining portion of the steel plate to bend upwards. The rotation center of the arc-shaped pressing plate 601 coincides with the bottom end of the arc-shaped guide plate 501, meaning that the arc-shaped pressing plate 601 rotates at the bottom end of the arc-shaped guide plate 501. The arc-shaped pressing plate 601 and the arc-shaped guide plate 501 together can form a shape that is close to a perfect circle.

[0038] During the process of the steel plate gradually bending upwards, the overlapping edge pressure plate 603 should be rotated in advance using motor 605, so that the overlapping edge pressure plate 603 and the top of the arc-shaped pressing plate 601 extend tangentially. Figure 8The position shown indicates that the overlapping edge pressure plate 603 is rotated to a vertical position. After the arc-shaped pressing plate 601 and the arc-shaped guide plate 501 are combined into a circle, the overlapping edge pressure plate 603 is in a horizontal position due to the change in the position of the arc-shaped pressing plate 601. That is, the function of the overlapping edge pressure plate 603 is to adhere to the surface of the steel plate. When the steel plate is about to be rolled into a circle, the overlapping edge pressure plate 603 presses down on the overlapping part of the steel plate, preventing the edge of the steel plate from being unable to reach the other overlapping edge that has already been bent due to an improper upward angle. After the arc-shaped pressing plate 601 completes a 90° rotation, the motor 605 drives the overlapping edge pressure plate 603 to rotate, pressing down the overlapping edge of the steel plate to bend downwards, ensuring the overlapping effect.

[0039] Specifically, the top plate assembly 7 includes a mounting bracket 704 fixed to the top of the support platform 4. A fixing plate 702 is fixedly connected to the side of the mounting bracket 704. An electric push rod 703 is fixedly connected to the fixing plate 702. The drive shaft of the electric push rod 703 is fixedly connected to the arc-shaped top plate 701. The extension and retraction of the electric push rod 703 can adjust the position of the arc-shaped top plate 701 and the arc-shaped pressing plate 601 clamping the steel plate together.

[0040] It is important to note that, in order to ensure that the overlapping edges on both sides overlap smoothly, during the process of bending the remaining part of the steel plate by the curved pressing plate 601, the curved top plate 701 should extend outward a certain distance under the drive of the electric push rod 703, so that the curved top plate 701 is closer to the curved pressing plate 601. The earlier the curved top plate 701 contacts the steel plate, the greater the bending deformation angle of the steel plate, that is, the more horizontal the other overlapping edge of the steel plate becomes. Then, the curved top plate 701 is gradually moved backward under the drive of the electric push rod 703 until it overlaps the curved pressing plate 601. The centers of the pressure plates 601 coincide, and during this process, the steel plate with a smaller center is pushed towards the arc-shaped guide plate 501 by the arc-shaped pressing plate 601, and the other overlapping edge of the steel plate can move smoothly to below the top of the arc-shaped guide plate 501. As the arc-shaped top plate 701 returns to its position and the arc-shaped pressing plate 601 continues to move, the steel plate will be pressed into a state with the same center as the arc-shaped pressing plate 601 and the arc-shaped top plate 701. The top edge of the steel plate will continue to slide below the arc-shaped guide plate 501 until it is blocked by the insert plate 504, completing the overlap of the overlapping edges.

[0041] During the bending process of the arc-shaped pressing plate 601, since the overlapping edge pressing plate 603 is an extension of the tangential direction of the arc-shaped pressing plate 601, the edge of the steel plate will retract to the inside of the blocking plate 604 near the top of the arc-shaped guide plate 501 and come into contact with the blocking plate 604. Capacitive sensors or inductive contact switches are provided on both sides of the blocking plate 604 to help detect whether the side edges of the steel plate are in a parallel state. If the position slips, one of the drive drums 606 of the two motors 605 can be controlled to rotate independently to help adjust the position of the steel plate edge and ensure that the steel plate is straight during bending.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A welding device for longitudinal seams of steel drum bodies, comprising a roll welding head (1), an outer diameter positioning roller (2), and a transfer frame (3), characterized in that, Also includes: The curling positioning component (5) is located below the roll welding head (1), which bends half of the steel plate into a circle and positions the edge overlap of the bent circular part of the steel plate. The pressing positioning component (6) is located below the curling positioning component (5) and presses the remaining straight part of the steel plate in a rotating manner, and positions the edge overlap position of the straight part of the steel plate. The top plate assembly (7) is located above the pressing and positioning assembly (6) and corresponds to the position of the rotating pressing and positioning assembly (6). It helps the steel plate bend and the degree of bending of the steel plate can be adjusted by adjusting the position of the top plate assembly (7).

2. The welding equipment for longitudinal seams of steel drum bodies according to claim 1, characterized in that, The curling positioning component (5) includes an arc-shaped guide plate (501) and a flat support plate (506). The flat support plate (506) is matched with the transfer frame (3), and the steel plate moves from the transfer frame (3) onto the flat support plate (506). The end of the arc-shaped guide plate (501) has a rotatable L-shaped baffle (502) and a liftable insert plate (504). The L-shaped baffle (502) is used to block the side edge of the bent part of the steel plate. After the insert plate (504) moves down, it presses down the bent part of the steel plate and blocks the side edge of the steel plate after bending on the other side.

3. The welding equipment for longitudinal seams of steel drum bodies according to claim 2, characterized in that, The arc-shaped guide plates (501) are numerous and staggered. An L-shaped baffle (502) is rotatably connected to the arc-shaped guide plates (501) located at the two side edges. A motor (503) for driving the L-shaped baffle (502) to rotate is fixedly installed on both sides of the two arc-shaped guide plates (501). An arc-shaped guide plate (509) is fixedly connected to the inner diameter of the arc-shaped guide plate (501), which together with the arc-shaped guide plate (501) restricts the movement path of the steel plate.

4. The welding equipment for longitudinal seams of steel drum bodies according to claim 2, characterized in that, An electric push rod (505) is fixedly installed on the arc-shaped guide plate (501) by a mounting seat. The insert plate (504) is fixedly installed on the moving shaft of the electric push rod (505), and the insert plate (504) is vertically slidably inserted on the arc-shaped guide plate (501).

5. The welding equipment for longitudinal seams of steel drum bodies according to claim 3, characterized in that, The curling positioning assembly (5) also includes a second motor (508) and a drive roller (507) driven by the second motor (508). The drive roller (507) is located above the junction of the arc-shaped guide plate (501) and the flat support plate (506), contacts the steel plate and drives the steel plate to slide toward the flat support plate (506), and is guided by the flat support plate (506) to bend.

6. The welding equipment for longitudinal weld seams of steel drum bodies according to claim 5, characterized in that, The pressing and positioning assembly (6) includes multiple arc-shaped pressing plates (601) that are staggered with the arc-shaped guide plate (501). The top of the multiple arc-shaped pressing plates (601) is rotatably connected to an overlapping edge pressing plate (603). A blocking plate (604) is fixedly connected to the end edge of the overlapping edge pressing plate (603). Two arc-shaped pressing plates (601) located on both sides are fixedly connected to a motor (605) that is fixedly connected to the overlapping edge pressing plate (603), which can drive the overlapping edge pressing plate (603) to rotate.

7. The welding equipment for longitudinal seams of steel drum bodies according to claim 6, characterized in that, The pressing and positioning assembly (6) also includes a motor three (602), the ends of the plurality of arc-shaped pressing plates (601) are fixedly connected to a rotating shaft, and the rotating shaft is rotatably connected in the plurality of arc-shaped guide plates one (501), and the motor three (602) is fixedly connected to the rotating shaft; Two arc-shaped pressing plates (601) located on both sides are fixedly connected to a motor four (605) on their side walls. The motor four (605) is driven by a rotating drum (606), which is rotatably connected to the middle position of the arc-shaped pressing plate (601).

8. The welding equipment for longitudinal seams of steel drum bodies according to claim 7, characterized in that, The top plate assembly (7) includes a mounting bracket (704) fixed to the top of the support platform (4). A fixing plate (702) is fixedly connected to the side of the mounting bracket (704). An electric push rod (703) is fixedly connected to the fixing plate (702). The drive shaft of the electric push rod (703) is fixedly connected to the arc-shaped top plate (701). The extension and retraction of the electric push rod (703) can adjust the position of the arc-shaped top plate (701) and the arc-shaped pressing plate (601) clamping the steel plate together.

9. The welding equipment for longitudinal seams of steel drum bodies according to claim 7, characterized in that, It also includes a support platform (4), where the second motor (508) and the third motor (602) are fixed on the top of the support platform (4), and the arc-shaped guide plate (501) and the flat support plate (506) are fixedly installed on the top of the support platform (4); The outer diameter positioning roller (2) is placed on the outlet side of the barrel body to assist in positioning the outer diameter of the barrel body.

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