An alloy resistance strip welding equipment

Abstract

This invention provides an alloy resistance strip welding device for welding multiple strips together. It includes a leveling mechanism, a welding table, and a traction machine arranged sequentially along the strip conveying direction. The traction machine pulls the strips synchronously forward, allowing them to pass through the leveling mechanism and the welding table. A laser welding head is mounted on the welding table, facing the contact point of adjacent strips, and is used to weld adjacent strips together. The leveling mechanism includes a base, a leveling roller group, and a feed roller. The leveling roller group rolls the strips to make them flat. The feed roller is located on the base at one end away from the welding table and guides the strips to adhere to each other. In summary, when changing the strip size, there is no need to readjust the feed roller, which improves the strip feeding efficiency, ensures the strips are tightly packed before entering the welding station, and guarantees the welding quality of the alloy resistance strips.

Description

Technical Field

[0001] This invention relates to the field of resistor production, and in particular to an alloy resistor strip welding equipment. Background Technology

[0002] Figure 1 This is a schematic diagram of the strip 20 used to prepare alloy resistors. The strip 20 consists of a resistor strip 21 and copper strips 22 welded to both sides of it. During the raw material processing stage of alloy resistor production, the above three strips need to be welded together in sequence.

[0003] When welding the strips, two guide plates are configured on the strip conveying path to guide the copper strips 22 located on both sides toward the resistor strip 21, so that the sides of the resistor strip 21 and the copper strip 22 are in contact, preparing for welding. However, the method of using guide plates to keep the three strips in contact with each other has the following problems: 1. When the material dimensions change, the spacing of the guide plates needs to be readjusted, and it cannot be used directly; 2. The spacing between the guide plates requires high precision. If the spacing between the two guide plates is too large, it cannot be guaranteed that the material is in a close fit when it enters the welding station, resulting in a problem of incomplete welding at the part where the material is not in fit. If the spacing between the two guide plates is too small, the material cannot pass through the guide plates smoothly, resulting in a jamming problem. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an alloy resistance strip welding equipment that eliminates the need for readjustment when changing the strip size, improves welding efficiency, and ensures that the strip enters the welding station in a tight-fitting state, thereby guaranteeing welding quality.

[0005] The objective of this invention is achieved through the following technical solution: An alloy resistance strip welding equipment for welding multiple strips together includes: a leveling mechanism, a welding table, and a traction machine arranged sequentially along the strip conveying direction; The traction machine is used to pull the strip material synchronously and move it so that the strip material passes through the leveling mechanism and the welding table. The welding table is equipped with a laser welding head, which faces the contact position of adjacent strip materials. The laser welding head is used to weld adjacent strip materials together. The leveling mechanism includes a base, a leveling roller group, and a feeding roller. The leveling roller group is used to roll the strip to make the strip flat. The feeding roller is located on the base at one end away from the welding table and is used to guide the strips to fit together.

[0006] In one embodiment, the feed roller includes a central shaft and flexible threaded sleeves disposed at both ends of the central shaft. A grinding ring is provided on the central shaft, and two flexible threaded sleeves are slidably disposed on both sides of the grinding ring. A spring is provided at the end of each flexible threaded sleeve, and the spring is used to drive the flexible threaded sleeve to fit against the grinding ring. The outer wall of the flexible threaded sleeve is provided with external threads, and the external threads on the two flexible threaded sleeves have opposite directions of rotation. The rotation of the flexible threaded sleeve is used to push the strip material toward the grinding ring so that each strip material fits against the other.

[0007] In one embodiment, a flat key is provided on the central shaft, and a groove matching the flat key is provided on the flexible threaded sleeve.

[0008] In one embodiment, the width of the polishing ring is greater than the width of a single strip of material.

[0009] In one embodiment, the feed rollers are provided in two.

[0010] In one embodiment, the leveling roller group includes a plurality of upper rollers and a plurality of lower rollers, the upper rollers being located above the strip and the lower rollers being located below the strip, and the upper rollers and the lower rollers being staggered.

[0011] In one embodiment, the leveling roller assembly further includes a hydraulic cylinder and a lifting frame. The upper roller is mounted on the lifting frame, and the hydraulic cylinder is connected to the lifting frame. The hydraulic cylinder is used to drive the upper roller to move closer to or further away from the lower roller.

[0012] In one embodiment, a limiting groove is provided on the base, and a slider that matches the limiting groove is provided on the lifting frame.

[0013] In one embodiment, a silicone layer is provided on the outer wall of the flexible threaded sleeve.

[0014] In one embodiment, there are two laser welding heads, which are staggered from each other.

[0015] In summary, when changing the strip size, there is no need to readjust the feed rollers, which can improve the feeding efficiency of the strip, keep the strip in a tight fit when entering the welding station, and ensure the welding quality of the alloy resistance strip. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the alloy resistor strip structure; Figure 2 This is a schematic diagram of the structure of an alloy resistance strip welding equipment; Figure 3 This is a schematic diagram of the leveling mechanism; Figure 4 This is an internal structural view of the leveling mechanism; Figure 5 This is a schematic diagram showing the disassembly of the feed roller; Figure 6 A view showing the fit between the feed strip and the feed rollers during feeding.

[0018] Reference numerals: 10, Alloy resistance strip welding equipment; 100, Leveling mechanism; 110, Base; 111, Limiting groove; 120, Leveling roller group; 121, Upper roller; 122, Lower roller; 123, Hydraulic cylinder; 124, Lifting frame; 125, Slider; 130, Feed roller; 131, Central shaft; 132, Flexible threaded sleeve; 1321, External thread; 133, Grinding ring; 134, Spring; 135, Flat key; 200, Welding table; 210, Laser welding head; 300, Traction machine. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Please see Figure 2 The present invention provides an alloy resistance strip welding equipment 10, which includes: a leveling mechanism 100, a welding table 200 and a traction machine 300 arranged sequentially along the strip conveying direction.

[0023] The aforementioned alloy resistor strip welding equipment 10 is used to weld the raw materials of alloy resistors, specifically to weld multiple strips (here referring to resistor strip 21 and two copper strips 22) together.

[0024] The traction machine 300 is used to pull the strip material synchronously so that the strip material passes through the leveling mechanism 100 and the welding table 200. When feeding, the resistive strip material 21 is positioned between the two copper strip materials 22.

[0025] The welding table 200 is equipped with a laser welding head 210, which faces the contact position of adjacent strips. The laser welding head 210 is used to weld adjacent strips together; that is, the laser welding head 210 faces the contact position of the resistive strip 21 and the copper strip 22, and welds the copper strip 22 and the resistive strip 21 together to obtain... Figure 1 The alloy resistor strip shown is material 20.

[0026] Please see Figure 2 In one embodiment, there are two laser welding heads 210, which are staggered. After the three strips are bonded together, there are two bonding areas. Each of the two laser welding heads 210 is responsible for the welding task of one bonding area. The welding operation is completed in a single feed, which improves the welding efficiency.

[0027] Please see Figure 3 and Figure 4 The leveling mechanism 100 includes a base 110, a leveling roller group 120, and a feed roller 130. The leveling roller group 120 is used to roll the strip to make it flat. Both the resistive strip 21 and the copper strip 22 are coiled materials, bundled and stored. After unwinding, they are in a bent state. Rolling the unwinding part with the copper strip 22 can straighten the strip, ensuring that it is straight when it enters the welding position, thus preventing the strips from misaligning and causing welding failure. The feed roller 130 is located on the base 110 at the end away from the welding table 200. The feed roller 130 is used to guide the strips to come together, so that the copper strip 22 and the resistive strip 21 are in contact, preparing for the welding operation.

[0028] It should be noted that during welding, the copper strip 22 and the resistive element strip 21 need to be tightly bonded together. However, during the feeding process, there is a lack of connection between the resistive element strip 21 and the copper strip 22. The tension provided by the traction machine 300 alone cannot guarantee that the resistive element strip 21 and the copper strip 22 are bonded together. To avoid the problem of incomplete welding caused by gaps between the strips, this application also makes the following improvements to the feed roller 130: Please see Figure 3 and Figure 5 The feed roller 130 includes a central shaft 131 and flexible threaded sleeves 132 disposed at both ends of the central shaft 131. A grinding ring 133 is provided on the central shaft 131. Two flexible threaded sleeves 132 are slidably disposed on both sides of the grinding ring 133. A spring 134 is provided at the end of the flexible threaded sleeve 132. The spring 134 is used to drive the flexible threaded sleeve 132 to fit against the grinding ring 133. Please see Figure 5 and Figure 6 The flexible threaded sleeve 132 has an external thread 1321 on its outer wall, and the external threads 1321 on the two flexible threaded sleeves 132 have opposite directions of rotation. The rotation of the flexible threaded sleeve 132 is used to push the strip material toward the grinding ring 133 so that the strip materials fit together. Preferably, there are two feed rollers 130.

[0029] The principle by which the feed roller 130 drives the strip to stick together is as follows: The copper strip 22 and the resistor strip 21 are connected to the traction machine 300, and the resistor strip 21 is positioned between the two copper strips 22. The traction machine 300 provides traction force to drive the three strips to feed synchronously.

[0030] During welding, the copper strip 22 and the resistive element strip 21 need to be tightly bonded together. However, during the feeding process, there is a lack of connection between the resistive element strip 21 and the copper strip 22. The tension provided by the traction machine 300 alone cannot guarantee that the resistive element strip 21 and the copper strip 22 are bonded together. In this application, a feed roller 130 is configured at the strip feeding position. Two flexible threaded sleeves 132 on the feed roller 130 contact the two copper strips 22, and the external thread 1321 generates a thrust during the rotation of the feed roller 130. The direction of the thrust is as follows... Figure 6 As indicated by the arrow, the copper strip 22 is guided towards the resistive strip 21, thereby ensuring that the resistive strip 21 and the copper strip 22 are always in close contact. The laser welding head 210 welds the boundary between the resistive strip 21 and the copper strip 22, welding the three strips together.

[0031] It should be noted that when the external thread 1321 contacts the copper strip 22, slippage will occur when the thrust generated by the external thread 1321 is greater than the friction between the external thread 1321 and the copper strip 22. The copper strip 22 is kept in close contact with the resistive material strip 21, while the flexible threaded sleeve 132 continues to rotate, which can prevent the strip from being crushed. Furthermore, the flexible threaded sleeve 132 is slidably connected to the central shaft 131. When the reaction force acting on the flexible threaded sleeve 132 during the feeding process is too large, the spring 134 will be compressed, and the flexible threaded sleeve 132 will slide. After the reaction force decreases, the spring 134 will push the flexible threaded sleeve 132 back to its original position. The flexible threaded sleeve 132 and the spring 134 form a buffer structure, which makes the thrust acting on the strip controllable and can prevent the strip from being crushed.

[0032] Please see Figure 6 To further ensure the stability of the feeding process, two feed rollers 130 are configured. The two feed rollers 130 clamp the front and back sides of the strip respectively. When the strip passes the position of the feed rollers 130, the two flexible threaded sleeves 132 above and below clamp the copper strip 22 like "pliers". When the upper and lower feed rollers 130 rotate, the thrust generated by the external thread 1321 is directed towards the resistive strip 21. The two feed rollers 130 cooperate to drive the copper strip 22 toward the resistive strip 21.

[0033] In one embodiment, a silicone layer (not shown) is provided on the outer wall of the flexible threaded sleeve 132.

[0034] Please see Figure 5 In one embodiment, a flat key 135 is provided on the central shaft 131, and a sliding groove (not shown) matching the flat key 135 is provided on the flexible threaded sleeve 132, so that the flexible threaded sleeve 132 slides more smoothly relative to the grinding ring 133, avoiding jamming during translation.

[0035] The resistor strip 21 and the copper strip 22 are strips of different materials. Their sides are in contact, and there are burrs and protrusions on the edges of the strips, which causes a height difference at the boundary after they are in contact. In order to avoid the height difference at the contact point of the strips affecting the welding effect, the width of the grinding ring 133 is greater than the width of a single strip. In this way, the grinding ring 133 contacts the boundary point of the strips during the feeding process. When the feeding roller 130 rotates, the grinding ring 133 polishes the boundary point, making the boundary point of the strips flush and improving the welding quality.

[0036] In one embodiment, the feed roller 130 is located on the base 110 at one end away from the welding table 200, so that the three strips of material are brought together at the point where the material enters the welding equipment, in preparation for subsequent welding operations.

[0037] Please see Figure 3 and Figure 5In one embodiment, the leveling roller assembly 120 includes multiple upper rollers 121 and multiple lower rollers 122. The upper rollers 121 are located above the material, and the lower rollers 122 are located below the material, with the upper rollers 121 and lower rollers 122 offset from each other. The leveling roller assembly 120 also includes a hydraulic cylinder 123 and a lifting frame 124. The upper rollers 121 are mounted on the lifting frame 124, and the hydraulic cylinder 123 is connected to the lifting frame 124. The hydraulic cylinder 123 is used to drive the upper rollers 121 closer to or further away from the lower rollers 122. A limiting groove 111 is provided on the base 110, and a slider 125 matching the limiting groove 111 is provided on the lifting frame 124. After the equipment is started, the hydraulic cylinder 123 drives the lifting frame 124 to descend, pressing the strip between the upper roller 121 and the lower roller 122. During the feeding process, the upper roller 121 and the lower roller 122 roll the front and back sides of the strip respectively to make the strip flat.

[0038] In summary, the alloy resistance strip welding equipment 10 has the following beneficial effects: 1. When the flexible threaded sleeves 132 distributed on both sides of the central shaft 131 rotate, they generate thrust through the external thread 1321 to drive each strip material to move closer together, so that the strip materials remain in a close fit during the feeding process, saving the process of debugging the equipment and improving the efficiency of strip material welding.

[0039] 2. The flexible threaded sleeve 132 is slidably connected to the central shaft 131, and the end of the flexible threaded sleeve 132 is equipped with a spring 134. When the thrust applied to the strip is too large, the flexible threaded sleeve 132 slides to buffer and avoid scratching the strip.

[0040] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An alloy resistance strip welding device for welding multiple strips together, characterized in that, include: A leveling mechanism, a welding table, and a traction machine are arranged sequentially along the conveyor direction; The traction machine is used to pull the strip material synchronously and move it so that the strip material passes through the leveling mechanism and the welding table. The welding table is equipped with a laser welding head, which faces the contact position of adjacent strip materials. The laser welding head is used to weld adjacent strip materials together. The leveling mechanism includes a base, a leveling roller group, and a feeding roller. The leveling roller group is used to roll the strip to make the strip flat. The feeding roller is located on the base at one end away from the welding table and is used to guide each strip to fit together. The feed roller includes a central shaft and flexible threaded sleeves at both ends of the central shaft. A grinding ring is provided on the central shaft, and two flexible threaded sleeves are slidably disposed on both sides of the grinding ring. A spring is provided at the end of each flexible threaded sleeve, and the spring is used to drive the flexible threaded sleeve to fit against the grinding ring. The outer wall of each flexible threaded sleeve is provided with an external thread, and the external threads on the two flexible threaded sleeves have opposite directions of rotation. The rotation of the flexible threaded sleeve is used to push the strip material toward the grinding ring so that each strip material fits against the other. A flat key is provided on the central shaft, and a groove matching the flat key is provided on the flexible threaded sleeve.

2. The alloy resistance strip welding equipment according to claim 1, characterized in that, The width of the grinding ring is greater than the width of a single strip of material.

3. The alloy resistance strip welding equipment according to claim 1, characterized in that, The feed rollers are provided in two.

4. The alloy resistance strip welding equipment according to claim 1, characterized in that, The leveling roller assembly includes multiple upper rollers and multiple lower rollers. The upper rollers are located above the strip, and the lower rollers are located below the strip, with the upper rollers and lower rollers being staggered.

5. The alloy resistance strip welding equipment according to claim 4, characterized in that, The leveling roller assembly also includes a hydraulic cylinder and a lifting frame. The upper roller is mounted on the lifting frame, and the hydraulic cylinder is connected to the lifting frame. The hydraulic cylinder is used to drive the upper roller to move closer to or further away from the lower roller.

6. The alloy resistance strip welding equipment according to claim 5, characterized in that, The base has a limiting groove, and the lifting frame has a slider that matches the limiting groove.

7. The alloy resistance strip welding equipment according to claim 1, characterized in that, The outer wall of the flexible threaded sleeve is provided with a silicone layer.

8. The alloy resistance strip welding equipment according to claim 1, characterized in that, The laser welding head is provided in two parts, and the two laser welding heads are staggered with each other.

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