Coil material belt

Abstract

The utility model relates to a coil material strip, and relates to the technical field of inductors, the coil material strip comprises two material strip main bodies and welding pieces, the number of the material strip main bodies is two, the material strip main bodies are arranged in parallel, and the material strip main bodies extend in the length direction; the multiple welding pieces are arranged between the two material belt bodies, every two welding pieces are oppositely arranged at intervals in the width direction, and each welding piece is provided with a spot welding opening. The device is used for solving the problem of poor contact caused by the fact that a ball bag formed by cooling after spot welding of an existing coil material belt and a coil is large.

Description

Technical Field

[0001] This application relates to the field of inductor technology, and in particular to a coil strip. Background Technology

[0002] Coil strips are widely used in the manufacturing of electronic components, playing a crucial role, especially in the production of inductors. With the miniaturization and high integration of electronic products, higher demands are placed on the quality and stability of inductors. However, before molding, the two ends of the inductor coil need to be spot-welded to the coil strip. During spot welding, molten metal overflows, forming large spherical bulges. This not only increases the risk of poor contact at the solder joints but may also affect the electrical performance and reliability of the final product. Utility Model Content

[0003] This application provides a coil strip to solve the problem of poor contact caused by the large ball-shaped bulge formed after the current coil strip is spot-welded and cooled.

[0004] A coil strip, comprising:

[0005] The material strip body has two parallel strips, each extending along the length direction;

[0006] Welding pieces are provided in multiples and are all located between the two main strips. Every two welding pieces are arranged at intervals along the width direction, and each welding piece is provided with a spot weld.

[0007] By adopting the above technical solution, when the two ends of the coil are spot welded to two oppositely arranged welding pieces, liquid metal flows into the spot weld joint, which reduces the volume of the solidified ball pack, effectively reducing the probability of poor contact at the welding point caused by the ball pack, improving the reliability of the welding point, and thus ensuring the electrical performance and connection stability of the coil strip.

[0008] In one embodiment, the welding piece includes a connecting portion and a bending portion, one end of the connecting portion is connected to the strip body, and the other end is connected to the bending portion, wherein the bending portion is provided with a spot weld.

[0009] By adopting the above technical solution, this design ensures that the welding piece is firmly connected to the main body of the coil strip, can withstand a certain external force, and ensures that the welding piece will not easily fall off during subsequent processing and use, thereby enhancing the overall structural stability of the coil strip.

[0010] In one embodiment, the bent portion includes a first segment and a second segment, the first segment and the second segment extending on both sides along the length direction, and the spot weld is located in the second segment.

[0011] By adopting the above technical solution, it was determined that the spot weld joint can be located inside the second section, allowing operators to accurately align it during spot welding, thus improving the precision and efficiency of spot welding. At the same time, this positioning facilitates the flow of liquid metal into the spot weld joint, ensuring consistent welding quality.

[0012] In one embodiment, the spot weld is located on the side of the second segment away from the connection portion and extends toward the connection portion.

[0013] By adopting the above technical solution, the spot weld joint is made larger in volume by passing through from the outside to the inside of the second end, making it easier for liquid metal to flow into the spot weld joint. Furthermore, the flow path of the liquid metal is more reasonable during the welding process, which can better fill the spot weld joint and form a stronger welded connection.

[0014] In one embodiment, the second segment is further provided with a groove, the groove being arranged along the length direction, and the spot weld passing through the groove.

[0015] By adopting the above technical solution, the two ends of the coil can be placed in the grooves on the two opposite second segments and then spot welded. This design improves the accuracy and efficiency of spot welding, reduces the offset and misalignment of the coil during spot welding, improves the stability and reliability of welding, ensures the structural strength and electrical performance of the coil strip, and improves product quality.

[0016] In one embodiment, the material strip body is further provided with positioning holes, which correspond one-to-one with the connecting parts.

[0017] By adopting the above technical solution, the positioning hole can be used as a positioning reference during the die casting and cutting process of inductors, enabling the processing equipment to accurately position and process the material strip, improving processing accuracy and efficiency, reducing product size deviations or quality problems caused by inaccurate positioning, and improving the overall quality of the product.

[0018] In one embodiment, the connecting portion is further provided with a plurality of through holes.

[0019] By adopting the above technical solution, the contact area of ​​liquid metal when spot welding the connection part with other components is increased, the reliability of the connection is improved, the coil strip is more adaptable to harsh working environments, and the failure caused by unreliable connection is reduced.

[0020] In one embodiment, the coil strip further includes a support plate, which is provided in multiple manner and connected to two strip bodies at both ends respectively. The support plate and the welding plate are arranged at intervals along the length direction.

[0021] By adopting the above technical solution, both ends of the support plate are connected to the main body of the strip, and are arranged alternately with the welding plate along the length direction. This helps to evenly distribute the stress generated when the strip is under force, avoid stress concentration in a certain part, enhance the connection strength between the main bodies of the strip, and make the strip less prone to deformation or damage during transportation and processing, thereby improving the overall structural stability and durability of the coil strip.

[0022] In one embodiment, the strip body further includes a through hole located at the connection between the strip body and the support piece.

[0023] By adopting the above technical solution, stress concentration is effectively reduced. Stress concentration may cause cracks or damage to the strip in that area. The presence of through holes disperses the stress, making the stress distribution more uniform, increasing the outward deformation of the support plate, and improving the fatigue resistance and service life of the strip.

[0024] In one embodiment, the strip body, the support sheet, and the welding sheet are integrally formed.

[0025] By adopting the above technical solution, the connection processes between components are reduced, improving production efficiency. At the same time, one-piece molding avoids potential problems such as loosening or detachment at the connection points, improving product quality and reliability, and ensuring the overall performance of the coil strip.

[0026] In summary, this application includes at least one beneficial effect:

[0027] 1. When the two ends of the coil are spot welded to two oppositely arranged welding pieces, liquid metal flows into the spot weld joint, which reduces the volume of the ball after solidification. This effectively reduces the probability of poor contact at the welding point caused by the ball, improves the reliability of the welding point, and thus ensures the electrical performance and connection stability of the coil material.

[0028] 2. The two ends of the coil can be placed in the grooves on the two opposite second sections for spot welding. This design improves the accuracy and efficiency of spot welding, reduces the offset and misalignment of the coil during spot welding, improves the stability and reliability of welding, ensures the structural strength and electrical performance of the coil strip, and improves product quality.

[0029] 3. It increases the contact area of ​​liquid metal when spot welding the connection part with other components, improves the reliability of the connection, makes the coil strip more adaptable to harsh working environments, and reduces failures caused by unreliable connections. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a coil strip provided in an embodiment of this application;

[0031] Figure 2yes Figure 1 A magnified view of part A in the middle;

[0032] Figure 3 This is a schematic diagram of the structure of a coil strip provided in the second embodiment of this application;

[0033] Figure 4 yes Figure 3 A magnified view of part B in the middle section.

[0034] Explanation of reference numerals in the attached drawings: 1. Coil strip; 11. Strip body; 111. Positioning hole; 112. Through hole; 12. Welding piece; 121. Spot weld; 122. Connecting part; 1221. Through hole; 123. Bending part; 1231. First section; 1232. Second section; 1233. Groove; 13. Support piece. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-4 The coil strip provided in this application will be described in further detail.

[0036] Example 1

[0037] Please see Figure 1-4 The coil strip 1 provided in this embodiment includes two parts: a strip body 11 and a welding piece 12.

[0038] like Figures 1 to 2 As shown, two strip bodies 11 are arranged side by side and extend along the length direction. Specifically, the strip body 11 is made of high-strength aluminum alloy material, which has good thermal conductivity and corrosion resistance. Its surface is anodized to improve wear resistance.

[0039] Multiple welding pieces 12 are distributed between two strip bodies 11, with each pair of welding pieces 12 spaced apart along the width direction. Each welding piece 12 has a spot weld joint 121. Specifically, the welding piece 12 includes a connecting portion 122 and a bending portion 123, which are connected to each other at a certain angle. One end of the connecting portion 122 is firmly connected to the strip body 11, and the other end gradually transitions to the bending portion 123. There is a gap between two bending portions 123 facing each other along the width direction, which facilitates spot welding of the two ends of the coil to the bending portion 123 respectively. The connecting portion 122 is made of thin steel plate with good ductility, with a thickness of about 0.1mm-0.2mm, so as to ensure sufficient strength while having a certain degree of flexibility to adapt to complex processing environments. The bending portion 123 includes a first segment 1231 and a second segment 1232. Along the width direction, the first segments 1231 of the two welding pieces 12 correspond to each other, and the second segments 1232 also correspond to each other. The first segments 1231 and 1232 are spaced apart and extend along both sides of the length direction, forming a unique geometric shape. This facilitates placing the two ends of the coil on the two opposing second segments 1232. The second segments 1232 have spot welds 121 to accommodate excess molten material. The bending portion 123 can use the same material and be formed into the desired shape through stamping. The first segment 1231 of the bending portion 123 can be an arc shape or other smooth curve shape to reduce stress concentration. The spot welds 121 can also be rectangular, circular, or other shapes depending on different requirements.

[0040] The spot weld joint 121 can be located at the end of the second segment 1232 away from the connecting portion 122 and extend towards the connecting portion 122; alternatively, the spot weld joint 121 can be located within the second segment 1232. Both designs allow molten metal to flow smoothly into the spot weld joint 121 during spot welding, thereby dispersing the heat accumulation area, avoiding excessive local thermal stress, and improving reliability. Regarding the construction of the spot weld joint 121 itself, in addition to the basic opening, some small protrusions or decorative textures can be added, such as adding a fine serrated texture to the edge or locally thickening the treatment layer, etc., with the aim of more effectively controlling the heat transfer path and optimizing the hydrodynamic characteristics.

[0041] The strip body 11 may also be equipped with positioning holes 111, which correspond one-to-one with the connecting part 122. Specifically, the positioning holes 111 are usually circular or polygonal in structure and can be made by machining or chemical etching. Their purpose is to facilitate precise positioning in subsequent processes, such as the die casting of inductors and the cutting and separation stage.

[0042] The coil strip 1 may also include a support plate 13. The two ends of the support plate 13 are fixedly connected to the two strip bodies 11, and the support plate 13 and the welding plate 12 are arranged alternately along the length. To reduce stress concentration, through holes 112 can be made at the connection between the strip body 11 and the support plate 13. Specifically, the main function of the support plate 13 is to enhance the rigidity of the entire coil strip 1 and prevent it from undergoing excessive deformation under external forces. The support plate 13 can also be made of various materials, such as high-strength aluminum alloy or carbon fiber composite materials, to meet the requirements for corrosion resistance and lightweighting under different environmental conditions. The through holes 112 can take various forms, including T-shaped holes, circular holes, square holes, or irregularly shaped holes, depending on the actual situation. In addition, reinforcing ribs can be provided around the through holes 112 to compensate for the loss of mechanical properties caused by the opening. The entire coil strip 1 is produced using an integrated molding process, which greatly simplifies the assembly process and significantly shortens the production cycle time.

[0043] The implementation principle of this embodiment is as follows: By setting spot weld joints 121 in the second segment 1232, when the two ends of the coil are placed on the two opposite second segments 1232 for spot welding, the liquid metal can flow into the spot weld joints 121, reducing the possibility of poor contact caused by the formation of spherical bulges after the liquid metal cools. By introducing the support piece 13 and the through hole 112 structure, not only is the overall mechanical property of the coil strip 1 enhanced, but the stress distribution is also optimized, thereby significantly reducing the possibility of damage caused by external vibration or impact. In addition, the presence of the through hole 112 also indirectly improves the production process, increasing production efficiency and product quality.

[0044] Example 2

[0045] like Figures 3 to 4 As shown, this embodiment differs from the previous embodiment in that the second segment 1232 is further provided with a groove 1233, which extends along the length direction, and the spot welding port 121 passes through the groove 1233. Specifically, the groove 1233 can be used to pre-fix the end of the coil to be welded. The groove 1233 can be made by machining, and its height needs to be less than the height of the second segment 1232, while its width can be slightly larger than the coil diameter. The bottom surface of the groove 1233 is polished to reduce frictional resistance and provide a certain guiding effect for the coil. The opening of the groove 1233 can be designed with a gradually expanding transition shape, which helps to guide the liquid metal flow into the spot welding port 121, thereby better achieving the spot welding goal.

[0046] In addition, the connecting part 122 is provided with multiple through holes 1221. The through holes 1221 can be arranged in a matrix or other shapes. The shape of each through hole 1221 can be square, circular, etc. The function of the through holes 1221 is to increase the welding contact area between the connecting part 122 and other components such as circuit boards, thereby improving the welding strength. The layout of the through holes 1221 can be flexibly arranged according to the load conditions, and can be evenly distributed or biased towards a specific area for reinforcement. It is recommended that the edges of the through holes 1221 be chamfered to help eliminate potential hazards caused by sharp edges and extend service life.

[0047] The implementation principle of this embodiment is as follows: by introducing the groove 1233, the accuracy and efficiency of spot welding are improved, the offset and misalignment of the coil during spot welding are reduced, and the stability and reliability of welding are improved; by setting the through hole 1221, the welding strength of the welding piece 12 and other devices is improved, and the failure caused by unreliable connection is reduced.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A coil strip, characterized in that, include: The material strip body (11) has two parallel sections, and both material strip bodies (11) extend along the length direction; Welding pieces (12) are provided in multiples and are all located between the two strip bodies (11). Every two welding pieces (12) are arranged at intervals relative to each other in the width direction. Each welding piece (12) is provided with a spot weld (121).

2. The coil strip according to claim 1, characterized in that, The welding piece (12) includes a connecting part (122) and a bending part (123). One end of the connecting part (122) is connected to the strip body (11), and the other end is connected to the bending part (123). The bending part (123) is provided with a spot weld (121).

3. The coil strip according to claim 2, characterized in that, The bent portion (123) includes a first segment (1231) and a second segment (1232), the first segment (1231) and the second segment (1232) extending on both sides along the length direction, and the spot weld (121) is located in the second segment (1232).

4. The coil strip according to claim 3, characterized in that, The spot weld (121) is located on the side of the second segment (1232) away from the connecting part (122) and extends toward the connecting part (122).

5. A coil strip according to claim 3, characterized in that, The second segment (1232) is also provided with a groove (1233), the groove (1233) is provided along the length direction, and the spot weld (121) passes through the groove (1233).

6. A coil strip according to claim 2, characterized in that, The main body (11) of the material strip is also provided with positioning holes (111), and the positioning holes (111) correspond one-to-one with the connecting part (122).

7. A coil strip according to claim 2, characterized in that, The connecting part (122) is also provided with a plurality of through holes (1221).

8. A coil strip according to claim 1, characterized in that, The coil strip (1) also includes a support plate (13). The support plate (13) is provided in multiple ways and its two ends are respectively connected to the two strip bodies (11). The support plate (13) and the welding plate (12) are arranged at intervals along the length direction.

9. A coil strip according to claim 8, characterized in that, The material strip body (11) also includes a through hole (112), which is located at the connection between the material strip body (11) and the support piece (13).

10. A coil strip according to claim 8, characterized in that, The strip body (11), the support piece (13), and the welding piece (12) are integrally formed.

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