A roll welding device

Abstract

This invention relates to a roll welding apparatus, comprising a frame, a horizontally oriented flat plate electrode at the lower part of the frame, and a clamping mechanism fixedly connected to the frame above the flat plate electrode and capable of vertical movement. The upper part of the frame has a slide rail parallel to the flat plate electrode, a slider sliding on the slide rail, and a vertically movable roller electrode on the slider. The roller electrode is located above the clamping mechanism and can rotate around its axis. The clamping mechanism includes a strip-shaped pressure plate parallel to the flat plate electrode and a support frame fixedly connected to the frame. The pressure plate slides vertically on the support frame and has a strip-shaped through hole. The roller electrode moves downward through the strip-shaped through hole and is electrically connected to the flat plate electrode. This invention uses a roller electrode as the upper electrode and a flat plate electrode as the lower electrode, enabling the welding of a long, straight weld seam in a single roll welding operation. The weld seam is aesthetically pleasing, highly efficient, and automatically clamps, ensuring low deviation in weld seam position and eliminating noticeable protrusions.

Description

Technical Field

[0001] This invention relates to welding equipment, and more particularly to a roll welding apparatus. Background Technology

[0002] With the rapid development of industrial technology, industrial production increasingly pursues high efficiency and high quality, especially in automated stamping lines. After each roll of material is used up, the head of the new roll needs to be welded to the tail of the original strip to achieve continuous feeding to the press. Ordinary welding processes use manual welding, employing welding wire or electrodes to fill the weld and then grinding the protruding parts of the weld. After welding, the weld height needs to be ground to ensure that the strip is free of protrusions and can smoothly enter the press. This mode cannot achieve efficient production, consumes a lot of manpower, has poor product precision, and a high product defect rate, making it difficult to match subsequent automated continuous production operations. Furthermore, some existing roll welding devices are not good at fixing the strip to be welded and cannot complete the welding of long straight seams in one go. Summary of the Invention

[0003] To address the shortcomings of existing methods, this invention provides a roll welding apparatus.

[0004] The technical solution adopted by this invention to solve its technical problem is: a roll welding device, including a frame, a horizontally oriented elongated flat electrode at the lower part of the frame, and a pressing mechanism fixedly connected to the frame above the flat electrode and capable of moving up and down; a slide rail parallel to the flat electrode is provided at the upper part of the frame, a slider driven by a servo motor slides on the slide rail, and a disc-shaped roller electrode capable of moving up and down is provided on the slider, the roller electrode being located above the pressing mechanism and capable of rotating around its axis; the pressing mechanism... The mechanism includes a strip-shaped pressure plate parallel to the flat plate electrode and a support frame fixedly connected to the frame. The pressure plate slides vertically on the support frame and has a strip-shaped through hole. The roller electrode moves downward through the strip-shaped through hole and is electrically connected to the flat plate electrode. The horizontal movement distance of the roller electrode matches the length of the strip-shaped through hole. The frame is also equipped with a feeding device, which includes a feeding bracket fixed to the frame, an upper roller and a lower roller that are parallel to the pressure plate, pivotally connected to the feeding bracket, and rotate in the same direction with an adjustable distance between them.

[0005] Preferably, the slider is provided with a mounting bracket that moves up and down, the mounting bracket is fixedly connected to a pressurizing cylinder, and the roller electrode is connected to the pressurizing cylinder.

[0006] Preferably, the servo motor is located on the upper part of the frame adjacent to the slide rail.

[0007] Preferably, the feed support includes a fixed column fixedly connected to the frame and a connecting member pivotally connected to the upper roller and the lower roller, wherein the connecting member is slidably or threadedly connected to the fixed column.

[0008] Preferably, four fixed posts and four connecting pieces are provided. The two ends of the upper roller are connected to the two fixed posts through two connecting pieces, and the two ends of the lower roller are connected to the other two fixed posts through two other connecting pieces.

[0009] The beneficial effects of this invention are as follows: the upper electrode is a disc-shaped roller electrode, and the lower electrode is a flat plate electrode. The roller electrode can move horizontally along the flat plate electrode and can also rotate itself during horizontal movement, forming a special roll welding. This ensures good conductivity and follow-up of the upper electrode, thereby ensuring the uniformity and flatness of the weld joint. The entire long straight weld can be welded in one go, resulting in a beautiful and efficient weld. At the same time, the material strip to be welded can be automatically clamped by the clamping mechanism, ensuring low deviation of the weld position and no obvious protrusion of the weld. This solves the problem of uneven welding and the need to grind the protruding weld after welding in traditional manual wire filler welding, as well as the problem that existing roll welding machines cannot perform long straight seam welding. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0011] Figure 2 This is an embodiment of the present invention. Figure 1 An enlarged schematic diagram of part A in the middle;

[0012] Component names and serial numbers in the diagram: 1-Frame 2-Flat plate electrode 3-Pressure mechanism 30-Pressure plate 31-Support frame 300-Strip through hole 4-Slide rail 40-Slider 400-Mounting bracket 401-Pressure cylinder 5-Servo motor 6-Roller electrode 7-Feeding device 70-Feeding bracket 71-Upper roller 72-Lower roller 700-Fixing column 701-Connecting part. Detailed Implementation

[0013] To more clearly illustrate the purpose, technical solutions, and advantages of the embodiments of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments, providing a clear and complete description. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. Furthermore, directional terms mentioned in the present invention, such as "up," "down," "front," "back," "left," "right," "inner," and "outer," are merely for reference to the directions shown in the accompanying drawings. The use of directional terms is for better and clearer explanation and understanding of the present invention, and is not intended to indicate or imply any necessary orientation of the present invention; therefore, it should not be construed as a limitation of the present invention.

[0014] Examples of embodiments of the present invention Figure 1 and Figure 2As shown, a roll welding device includes a frame 1, which is the same as the frame of a traditional roll welding machine. Upper and lower electrodes for roll welding, as well as other corresponding equipment, are mounted on the frame 1. A horizontally oriented elongated flat electrode 2 is provided at the lower part of the frame 1. The flat electrode 2 serves as the lower electrode of the roll welding device. It is an elongated flat electrode with a planar surface to facilitate the placement of the material to be welded. Its length is determined by the width of the material to be welded, preferably slightly larger than the width of the material. A pressing mechanism 3 is fixedly connected to the frame 1 above the flat electrode 2 and can move up and down. After the material to be welded is placed on the flat electrode 2, the pressing mechanism 3 moves downwards to fix it on the flat electrode 2. On the plate electrode 2, to ensure low deviation of the weld position, its up-and-down movement is achieved by a motor or cylinder, which can meet the needs of welding strips of different thicknesses. The upper part of the frame 1 is provided with a slide rail 4 parallel to the plate electrode 2. A slider 40 driven by a servo motor 5 slides on the slide rail 4. That is, the slider 40 slides on the slide rail 4 driven by the servo motor 5, and its sliding direction is along the long side of the plate electrode 2. This sliding allows the slider 40 to be positioned at different locations on the plate electrode 2. The servo motor 5 driving the slider 40 is located on the upper part of the frame 1 adjacent to the slide rail 4. The servo motor 5 ensures the accuracy of the movement distance. This structural arrangement also makes the structure more... Compact, simple, and easy to use, the slider 40 is equipped with a disc-shaped roller electrode 6 that can move up and down. The roller electrode 6 is located above the clamping mechanism 3 and can rotate around its own axis. The roller electrode 6 is a welding disc, which serves as the upper electrode. By moving it up and down, the distance between it and the flat electrode 2 can be adjusted to facilitate the placement of the material to be welded. At the same time, the roller electrode 6 moves horizontally with the slider 40 and can also rotate around its own axis. In this way, the roller electrode 6 can roll on the material to be welded during welding, realizing the welding of long straight seams. For the movement of the roller electrode 6 on the slider, the slider 40 is equipped with a vertically movable mounting bracket 400. The mounting bracket 400 is fixedly connected to... A pressurizing cylinder 401 is connected to the roller electrode 6. The pressurizing cylinder 401 moves up and down relative to the slider 40 with the mounting frame 400. The roller electrode 6 is connected to the piston of the pressurizing cylinder 401 and is driven by the pressurizing cylinder 401. When the roller electrode 6 presses against the strip to be welded, the pressurizing cylinder 401 ensures that the roller electrode 6 is in close contact with the strip to be welded during rolling and forms a welding circuit with the flat electrode 2. The pressing mechanism 3 includes a strip-shaped pressure plate 30 parallel to the flat electrode 2 and a support frame 31 fixedly connected to the frame 1. The pressure plate 30 moves up and down and slides on the support frame 31. The pressure plate 30 is provided with a strip-shaped through hole 300.The roller electrode 6 moves downward through the strip-shaped through hole 300 and electrically connects with the flat plate electrode 2. At this time, the pressure plate 30, slide rail 4, and flat plate electrode 2 are in a parallel position. The pressure plate 30 moves downward on the support frame 31 to press the strip to be welded. Its strip-shaped structure increases the contact area with the strip, fixing the strip more firmly and facilitating the rolling of the roller electrode 6 on the strip. The strip-shaped through hole 300 on the pressure plate 30 allows the roller electrode 6 to pass through and press against the strip to be welded, forming an upper and lower electrode circuit with the flat plate electrode 2. In order to ensure smooth welding, the horizontal movement distance of the roller electrode 6 is matched with the length of the strip-shaped through hole 300, thus avoiding the problem of partial welding failure or incomplete welding. At the same time, the length of the strip-shaped through hole 300 or the horizontal movement distance of the roller electrode 6 can be adjusted to accommodate strips of different widths to be welded. The horizontal movement distance of the roller electrode 6 can be adjusted by adjusting the stroke of the servo motor 5. This forms a welding circuit consisting of the roller electrode 6 and the flat electrode 2, which serve as the upper and lower electrodes. The power supply uses a medium-frequency inverter DC resistance welding power supply. This type of power supply has fault diagnosis and alarm functions for current abnormality, monitoring value over-limit, mains voltage over-limit, and overheating. Simultaneously, its power factor is as high as 90%, and the output current is in DC form. It has advantages such as high control precision, stable output current, low inductive reactance influence, lightweight welding transformer, and less spatter during welding. Its operating cost is lower than that of a power frequency AC power supply. Then, the material to be welded, such as aluminum strip, is placed on the lower flat electrode 2. The sliding plate 30 then presses the aluminum strip firmly onto the flat electrode 2. Afterward, the roller electrode 6 moves horizontally to the position above the corresponding aluminum strip with the slider 40, and then moves downward with the mounting bracket 400. The roller electrode 6 then passes through... The strip-shaped through-hole 300 on the pressure plate 30 presses against the aluminum strip, and then the pressure cylinder 401 drives the roller electrode 6 to press down and enhance the contact between the roller electrode 6 and the aluminum strip. The roller electrode 6 and the flat electrode 2 form a welding circuit. At the same time, since the weld is a section of weld, the roller electrode 6 rolls on the aluminum strip under the drive of the slider 40, realizing the welding of the aluminum strip within this rolling distance. After welding, the superimposed aluminum strip has no obvious protrusion, which eliminates the need for carbon dioxide shielded welding, plug welding and grinding processes, reducing workload and cost, and with less pollution. During operation, only one manual positioning of the material strips on both sides is required. After the material is aligned, the operator can press the operation button to realize automatic welding. The entire long straight weld can be welded in one go, with beautiful and efficient results. It also solves the problem that existing roller welding machines cannot perform long straight seam welding. Meanwhile, since the widths of the strips to be welded vary, to meet different requirements, the length of the flat electrode 2 is made greater than the length of the strip through-hole 300. The requirements are then met by adjusting the length of the strip through-hole 300 or the stroke of the servo motor 5. The length of the flat electrode 2 can be set using the maximum and minimum widths of the strips to be welded.

[0015] Further improvements, such as Figure 1 and Figure 2As shown, the frame 1 is also provided with a feeding device 7. The feeding device 7 includes a feeding bracket 70 fixed on the frame 1, an upper roller 71 and a lower roller 72 that are pivotally connected to the feeding bracket 70 and rotate in the same direction, with an adjustable distance between them. That is, the upper roller 71 and the lower roller 72 are both parallel to the pressure plate 30. They are pivotally connected to the feeding bracket 70 respectively, and they rotate in the same direction, that is, they rotate clockwise or counterclockwise at the same time. In use, the material belt is first placed between the upper and lower rollers, and then the distance between them is adjusted so that the material belt is clamped. Then, the rotation of the upper and lower rollers relative to the feeding bracket 70 is used to transport the material belt to the pressure plate 30. At this time, the feeding bracket 70 includes a fixed column 700 fixedly connected to the frame 1 and a connecting member 701 pivotally connected to the upper roller 71 and the lower roller 72. The connecting member 701 is slidably or threadedly connected to the fixed column 700. The fixed column 700 is fixed on the frame 1 and its position is fixed. By adjusting the position of the connecting member 701 on the fixed column 700, the distance between the upper and lower rollers is adjusted. The adjustment of the connecting member 701 is achieved by driving it to slide up and down on the fixed column 700 through a cylinder or motor, or by using the threaded rotation between the connecting member 701 and the fixed column 700 to adjust the position of the connecting member 701 on the fixed column 700. For structural stability, four fixed posts 700 and four connecting pieces 701 are provided. The two ends of the upper roller 71 are connected to the two fixed posts 700 through two connecting pieces 701, and the two ends of the lower roller 72 are connected to the other two fixed posts 700 through two other connecting pieces 701. This structure facilitates the setting of the upper and lower rollers and the rotation of the relative connecting pieces 701. At this time, the four fixed posts 700 can be set as the four vertices of a quadrilateral, and the upper and lower rollers are set on the fixed posts 700 on opposite sides. Then, the connecting piece 701 connected to the upper roller 71 passes over the pressure plate 30 and extends to the upper roller 72, so that the upper roller 71 is directly above the lower roller 72. The four fixed posts 700 can also be set on the same straight line, which is parallel to the pressure plate 30, and the four fixed posts 700 are spaced apart. The upper and lower rollers can be set on the two outer and two middle fixed posts 700 respectively.

[0016] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A roll welding apparatus, characterized in that: The device includes a frame, with a horizontally oriented elongated flat electrode at the lower part of the frame. A pressing mechanism is fixedly connected to the frame above the flat electrode and can move up and down. A slide rail parallel to the flat electrode is provided at the upper part of the frame. A slider driven by a servo motor slides on the slide rail, and a disc-shaped roller electrode that can move up and down is provided on the slider. The roller electrode is located above the pressing mechanism and can rotate around its axis. The pressing mechanism includes a strip-shaped pressure plate parallel to the flat electrode and a support frame fixedly connected to the frame. The pressure plate slides up and down on the support frame and has a strip-shaped through hole. The roller electrode moves downward through the strip-shaped through hole and is electrically connected to the flat electrode. The horizontal movement distance of the roller electrode matches the length of the strip-shaped through hole. The frame also includes a feeding device, which includes a feeding bracket fixed to the frame, an upper roller and a lower roller that are parallel to the pressure plate, pivotally connected to the feeding bracket, and rotate in the same direction with an adjustable distance between them.

2. The roll welding apparatus according to claim 1, characterized in that... The slider is equipped with a mounting bracket that moves up and down, and a pressure cylinder is fixedly connected to the mounting bracket. The roller electrode is connected to the pressure cylinder.

3. The roll welding apparatus according to claim 1, characterized in that... The servo motor is located on the upper part of the frame, adjacent to the slide rail.

4. The roll welding apparatus according to claim 1, characterized in that... The feeding bracket includes a fixed column fixedly connected to the frame and a connecting member pivotally connected to the upper roller and the lower roller. The connecting member is slidably or threadedly connected to the fixed column.

5. The roll welding apparatus according to claim 4, characterized in that... The fixed posts and connectors are provided in four types. The two ends of the upper roller are connected to the two fixed posts through two connectors, and the two ends of the lower roller are connected to the other two fixed posts through two other connectors.

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