Mobile phone cooling plate welding device and welding method

Abstract

This invention relates to a welding apparatus and method for a mobile phone cooling plate. The apparatus includes a lower cover module, an upper cover module, multiple welding point pressing blocks, and a middle plate pressing block. The lower cover module supports the product; the upper cover module includes a cover plate insert, which has a welding channel corresponding to the welding path of the product, an outer peripheral support portion located outside the welding channel, a middle support portion located inside the welding channel, and an elongated connecting portion connecting the outer peripheral support portion and the middle support portion. Multiple welding point pressing blocks are elastically floatingly disposed on the outer peripheral support portion and arranged along the outer side of the welding channel for pressing the adjacent area outside the welding path. The middle plate pressing block is fitted onto the middle support portion and can elastically float along the pressing direction for pressing the adjacent area inside the welding path; a guide constraint structure is provided between the middle plate pressing block and the middle support portion to limit the sway of the middle plate pressing block. This apparatus can stably press the inner and outer sides of the welding path, reduce the fluctuation of the bonding gap, and improve the welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a welding device and welding method for mobile phone cooling plates. Background Technology

[0002] As consumer electronics products become thinner and lighter, the thickness of ultra-thin cooling plates has generally been reduced to the range of 0.3mm to 0.5mm. During the manufacturing process, the upper and lower thin-walled plates need to be sealed together by laser welding along the circumference.

[0003] like Figures 1 to 2 As shown, a typical mobile phone cooling plate includes an irregularly shaped first plate 110 and a second plate 120, which are stacked and then welded together along a welding path 130 for sealing. The welding path 130 is an irregularly shaped, nearly closed path, containing several small-radius corners, narrow areas, and narrow bridge connecting sections. Within the area enclosed by the welding path, a slender first region 140 (i.e., a slender region) is formed. This region is narrow in width, long in extension, and has very limited space above it. Outside this slender first region, the remaining area inside the welding path is a larger second region 150 (i.e., an open region), with a relatively open structure.

[0004] However, ultra-thin cooling plates have extremely low rigidity and are highly sensitive to heat input, making them prone to warping and deformation during welding. The problem is even more pronounced when the welding path exhibits the aforementioned irregular characteristics: springback and thermal deformation at small-radius corners can easily lead to uncontrollable bonding gaps; narrow areas and narrow bridge connections, due to their weak structural rigidity, are susceptible to burn-through or local collapse if the clamping force is too high, while insufficient clamping force can result in incomplete welding or seal failure.

[0005] Existing fixture solutions mostly employ rigid pressing with a single plate or use independent pressure heads arranged along the outer perimeter to press the outer side of the welding path. However, regardless of whether it's a single plate pressure block or an outer perimeter pressure head, the pressing effect is limited to the outer edge of the welding path or the periphery of the weld point, and cannot apply effective normal pressing constraints across the welding path to the inner area. This causes the enclosed area inside irregularly shaped welding paths to arch and deform during welding due to lack of support, directly affecting the sealing quality. Furthermore, rigid pressing with a single plate cannot differentiate the pressing force according to the different rigidity and deformation characteristics between narrow areas, narrow bridge sections, and open areas, leading to localized overpressure causing collapse of thin-walled structures, or insufficient pressing resulting in substandard weld fit. These defects are particularly pronounced in the welding of ultra-thin cooling plates in the 0.3mm to 0.5mm range. Summary of the Invention

[0006] Therefore, the purpose of this invention is to overcome the shortcomings of existing laser welding fixtures, which can only apply pressure to the outside of the welding path and cannot effectively constrain the inner area of ​​the irregular welding path. Furthermore, it is difficult to adjust the clamping force according to the rigidity differences of different areas such as narrow areas and narrow bridge sections, resulting in inner arching deformation, local overpressure collapse, or insufficient pressing during the welding of ultra-thin cooling plates. The invention provides a welding device and method for mobile phone cooling plates that can effectively constrain the inner area of ​​the welding path while clamping the outside of the welding path, and can provide an appropriate clamping force according to the rigidity differences of each area. This effectively suppresses the warping deformation of ultra-thin plates during the welding process and improves the sealing quality and welding yield under irregular welding paths.

[0007] To solve the above-mentioned technical problems, in a first aspect, the present invention provides a mobile phone cooling plate welding apparatus, comprising: The lower cover module is used to support the product; The upper cover module is capable of covering the lower cover module. The upper cover module includes a cover plate, which has a welding channel corresponding to the welding path of the product, an outer peripheral support portion located outside the welding channel, a middle support portion located inside the welding channel, and an elongated connecting portion connecting the outer peripheral support portion and the middle support portion. The elongated connecting portion is provided corresponding to a first area of ​​the product. Multiple welding point pressure blocks are elastically floatingly disposed on the outer peripheral support part and arranged sequentially along the outside of the welding channel for pressing the product in the adjacent area outside the welding path; A middle plate pressing block is sleeved on the middle support part and can elastically float relative to the middle support part along the pressing direction. It is used to press the second area of ​​the product. The second area is located inside the welding path and is adjacent to the first area. A guide constraint structure is provided between the middle plate pressing block and the middle support part. The guide constraint structure is used to limit the middle plate pressing block from swinging relative to the middle support part when the middle plate pressing block presses the second area.

[0008] In one embodiment of the present invention, the guide constraint structure includes a linear bearing and a bushing. The bushing is disposed in the central bearing portion. One end of the linear bearing is disposed in the middle plate pressure block, and the other end is slidably inserted into the bushing to limit the middle plate pressure block from shifting in the non-pressing direction and from swaying relative to the central bearing portion.

[0009] In one embodiment of the present invention, the middle plate pressure block is provided with a countersunk hole and a through hole communicating with the countersunk hole; the linear bearing includes a small-diameter guide section, a limiting platform stage and a large-diameter mating section connected in sequence; The small-diameter guide section is inserted into the bushing; the limiting platform stage is disposed in the through hole, and the outer diameter of the limiting platform stage is larger than the inner diameter of the bushing; the large-diameter mating section is accommodated in the countersunk hole. When the middle plate pressing block is in the initial state of not pressing the product, the lower end face of the limiting stage abuts against the top end face of the bushing to limit the downward distance of the middle plate pressing block relative to the middle bearing part.

[0010] In one embodiment of the present invention, the inner wall of the bushing is provided with a plurality of spaced guide protrusions, which are used to contact the linear bearing.

[0011] In one embodiment of the present invention, the middle plate pressing block has a cavity for accommodating the middle bearing portion, and the middle plate pressing block has a pressing surface on the side facing the product, the pressing surface being arranged around the outer periphery of the cavity; the pressing surface of the middle plate pressing block is recessed with a plurality of spaced shallow pressure grooves.

[0012] In one embodiment of the present invention, the middle plate pressure block is provided with a middle plate pressure block spring sealing plate, and the middle plate pressure block spring sealing plate is fixedly connected to the middle bearing part through a connector passing through a clearance hole on the middle plate pressure block; a first spring is provided between the middle plate pressure block spring sealing plate and the middle plate pressure block.

[0013] In one embodiment of the present invention, an air inlet plate is provided on the outer peripheral support portion, the air inlet plate is provided with an air inlet hole and an air passage; the outer peripheral support portion is provided with an air blowing hole, the air blowing hole is connected to the air inlet hole and the air passage, the air blowing hole is disposed between two adjacent welding point pressure blocks, and the opening of the air blowing hole is inclined toward the corresponding welding point; a second spring is provided between the air inlet plate and the welding point pressure block.

[0014] In one embodiment of the present invention, the lower cover module is provided with a flip-pressing mechanism, the flip-pressing mechanism including a flip handle rotatably disposed on the lower cover module, the flip handle housing a top ball and a third spring; the upper cover module is provided with an arc-shaped groove that cooperates with the top ball; when the flip handle is flipped to the pressing position, the top ball abuts into the arc-shaped groove to press the upper cover module against the lower cover module.

[0015] In one embodiment of the present invention, an auxiliary cover plate fixed to the lower cover module is further included, the auxiliary cover plate being provided with a plurality of lateral positioning components for positioning the second plate side of the product; The lateral positioning assembly includes a moving groove, a lateral positioning block, a pull rope, and a fourth spring; the lateral positioning block is movably disposed in the moving groove, the fourth spring abuts against the side of the lateral positioning block away from the product, and one end of the pull rope is connected to the lateral positioning block; a limiting rod and a stop plate are provided on the side of the lower cover module, the limiting rod is connected to the other end of the plurality of pull ropes, and the stop plate is provided with a first stop groove and a second stop groove; When the limiting rod is in the first stop groove, the pull rope pulls the lateral positioning block to the retracted position; when the limiting rod is in the second stop groove, the lateral positioning block abuts against the closed end of the moving groove under the action of the fourth spring, so that the lateral positioning block is in the positioning position.

[0016] In a second aspect, the present invention also provides a method for welding a mobile phone cooling plate, employing the aforementioned mobile phone cooling plate welding apparatus, comprising: Switch the lateral positioning block to the retracted position, place the first plate of the product on the lower cover module and position it; Switch the lateral positioning block to the positioning position so that the lateral positioning block abuts against the closed end of the moving groove; Using the lateral positioning block in its positioning position as a lateral positioning reference, the second plate of the product is placed in. The upper cover module is closed, so that the multiple welding point pressing blocks press the product in the adjacent area outside the welding path, and the middle plate pressing block presses the product in the adjacent area inside the welding path under the constraint of the guide constraint structure. Laser welding is performed on the product along the welding channel; After welding is completed, switch the lateral positioning block to the retracted position, open the upper cover module, and take out the welded product.

[0017] The technical solution of the present invention has the following advantages compared with the prior art: (1) Improve the consistency of the pressing position on the inside and outside of the welding path. The welding channel is used to avoid the laser welding area. The slender connecting part connects the outer peripheral support part and the middle support part into one unit, so that the middle support part can extend to the inside of the welding path. Since the outer peripheral support part and the middle support part belong to the same cover plate, the positional relationship between the two is fixed. After the upper cover module is closed, the outer welding point pressing block and the inner middle plate pressing block are pressed against the product with the cover plate as the position reference. Compared with the method of setting the middle support part separately, this structure reduces the error caused by the separate positioning and installation of the middle support part, and improves the consistency of the pressing position after each closing. As a result, multiple welding point pressing blocks can stably press against the adjacent area on the outside of the welding path, and the middle plate pressing block can stably press against the adjacent area on the inside of the welding path, so that the product is kept in close contact on both the inside and outside of the welding path, reducing the problem of the inner area lifting, opening or incomplete pressing.

[0018] (2) Ensure the uniformity of the pressing force distribution and improve the pressing stability of the middle plate pressing block. The slender connecting part is set in the first area of ​​the product, and the first area itself is narrow; at the same time, the slender connecting part also needs to avoid the welding channel corresponding to the welding path, so its width and arrangement space are limited, and its supporting rigidity is weaker than that of the outer bearing part. When the middle plate pressing block presses the product, if the product reaction force deviates from the center of the middle plate pressing block, the middle plate pressing block is prone to swaying, resulting in local over-pressing and local under-pressing. The guiding constraint structure guides and limits the middle plate pressing block, so that the middle plate pressing block mainly floats along the pressing direction, reducing the impact of swaying on the pressing force distribution. As a result, the pressing uniformity and repeatability of the middle plate pressing block on the adjacent area inside the welding path can be improved.

[0019] (3) Differentiated clamping for different rigid areas. Multiple outer weld point clamping blocks are elastically floating and independently set, forming multiple independent clamping points on the outer side of the welding path, especially providing local clamping constraints for areas such as small radius corners, reducing local over-pressure or under-pressure; the inner middle plate clamping blocks continuously clamp the adjacent area on the inner side of the welding path, avoiding rigid hard pressure on the entire area on the inner side of the welding path, and providing stable constraints for the inner area close to the welding path. Thus, the multi-point clamping on the outer side of the welding path and the continuous clamping on the inner side of the welding path work together to improve the problem that the overall clamping method cannot meet the clamping requirements on both the inner and outer sides of the welding path.

[0020] (4) Effectively suppresses welding warping deformation. During laser welding, the area near the welding path is locally heated and shrinks during cooling. Thin-walled plates are prone to warping or local opening due to uneven heating and welding shrinkage. Multiple outer welding point pressure blocks elastically press against the adjacent area outside the welding path, keeping the first and second plates in close contact outside the welding path; the inner middle plate pressure block continuously presses against the adjacent area inside the welding path, so that the area inside the welding path is pressure-constrained during heating and cooling, making it less prone to upward arching. With the two working together, the product is pressure-constrained on both the inside and outside of the welding path, which helps to reduce warping, twisting and local deformation during the welding process, and improves welding quality and sealing reliability. Attached Figure Description

[0021] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1 This is an exploded diagram of a mobile phone cooling plate. Figure 2 This is a schematic diagram of the product structure of a mobile phone cooling plate; Figure 3 This is a schematic diagram of the structure of the mobile phone cooling plate welding device provided by the present invention; Figure 4 This is a top view of the mobile phone cooling plate welding device provided by the present invention; Figure 5 This is a schematic diagram of the structure of the top cover module provided by the present invention; Figure 6 This is a top view of the top cover module provided by the present invention; Figure 7 This is a schematic diagram of the structure of the top cover module provided by the present invention (with the air intake plate removed). Figure 8 This is a partial structural schematic diagram of the top cover module provided by the present invention; Figure 9 yes Figure 8 An enlarged view at point A; Figure 10 This is a schematic diagram of the structure of the weld point pressure block provided by the present invention; Figure 11 This is a schematic diagram of the rear structure of the air intake plate provided by the present invention; Figure 12 This is a top view of the central bearing portion and the central plate pressure block provided by the present invention; Figure 13 yes Figure 12 A cross-sectional view along the BB direction; Figure 14 This is a schematic diagram of the guiding constraint structure provided by the present invention; Figure 15 This is an exploded view of the guiding constraint structure provided by the present invention; Figure 16 This is a schematic diagram of the structure of the lower cover module provided by the present invention; Figure 17 This is a partial structural schematic diagram of the lateral positioning component provided by the present invention; Figure 18 This is a partial structural schematic diagram of the lateral positioning component provided by the present invention; Figure 19 This is a schematic diagram of the gear shift plate provided by the present invention; Figure 20 This is a schematic diagram of the flipping and pressing mechanism provided by the present invention; Figure 21 This is a flowchart of the mobile phone cooling plate welding method provided by the present invention.

[0023] Explanation of reference numerals in the accompanying drawings: 100, Product; 110, First sheet metal; 120, Second sheet metal; 130, Welding path; 140, First area; 150, Second area; 10. Lower cover module; 11. Lower cover plate; 12. Product positioning part; 121. Positioning bearing surface; 122. Positioning cylinder; 13. Positioning post; 20. Top cover module; 21. Top cover plate; 22. Positioning hole; 23. Cover plate insert; 231. Welding channel; 232. Outer peripheral bearing part; 233. Middle bearing part; 234. Slender connecting part; 235. Pressure block mounting hole; 24. Welded pressure block; 241. Moving part; 242. Pressing part; 243. Limiting ear; 25. Middle plate pressure block; 251. Countersunk hole; 252. Through hole; 253. Cavity; 254. Pressing surface; 256. Middle plate pressure block spring sealing plate; 257. Pressure block spring hole; 26. Guiding constraint structure; 261. Linear bearing; 2611. Small diameter guide section; 2612. Limiting platform stage; 2613. Large diameter mating section; 262. Bushing; 2621. Guide protrusion; 27. Air intake plate; 271. Air intake hole; 272. Air passage; 273. Air blowing hole; 274. Air intake plate spring hole; 30. Tilting and clamping mechanism; 31. Tilting handle; 32. Top ball; 33. Third spring; 34. Arc-shaped groove; 40. Auxiliary cover plate; 41. Lateral positioning assembly; 411. Moving groove; 4111. Closed end; 412. Lateral positioning block; 413. Pull rope; 414. Fourth spring; 42. Limiting rod; 43. Gear plate; 431. First gear groove; 432. Second gear groove. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0025] See Figures 1 to 2 As shown, the mobile phone cooling plate welding device is used to press-fit and position the product 100 and cooperate with laser welding. The product 100 includes a first plate 110 and a second plate 120. The first plate 110 is larger in size, and the second plate 120 is smaller in size. The second plate 120 is stacked on the first plate 110, and the two are welded along a predetermined welding path 130. In some embodiments, the welding path 130 extends along the inner edge of the second plate 120 and is arranged around the second plate 120, forming a generally closed ring. For ease of explanation, the elongated section of the product 100 is defined as the first region 140 (i.e., the elongated region), and the open area inside the welding path 130 excluding the first region 140 is defined as the second region 150 (i.e., the open region).

[0026] See Figures 3 to 4 As shown, the mobile phone cooling plate welding device includes a lower cover module 10, an upper cover module 20, multiple welding point pressure blocks 24, and a middle plate pressure block 25. The lower cover module 10 is used to support the product 100. See also... Figure 16 As shown, the lower cover module 10 includes a lower cover plate 11, on which a product positioning part 12 is provided. The product positioning part 12 includes a positioning bearing surface 121 and a plurality of positioning cylinders 122 arranged around the positioning bearing surface 121. The positioning bearing surface 121 is used to support the first plate 110. The plurality of positioning cylinders 122 are respectively located at different sides of the positioning bearing surface 121, and position the sides of the first plate 110 through their respective cylindrical surfaces, thereby defining the position of the first plate 110 on the positioning bearing surface 121, so that the product 100 is in a predetermined welding position.

[0027] The upper cover module 20 can be positioned over the lower cover module 10. See also, in some embodiments, […]. Figure 5 and Figure 16 As shown, the upper cover module 20 includes an upper cover plate 21, a lower cover plate 11 with a positioning post 13, and a positioning hole 22 on the upper cover plate 21 that mates with the positioning post 13. When the upper cover module 20 is placed on top of the lower cover module 10, the positioning post 13 is inserted into the positioning hole 22, thereby limiting the position of the upper cover module 20 relative to the lower cover module 10.

[0028] See Figures 3 to 13As shown, the upper cover module 20 includes an upper cover plate 21 and a cover plate insert 23, with the cover plate insert 23 disposed within the upper cover plate 21. The cover plate insert 23 has a welding channel 231, an outer peripheral support portion 232, a central support portion 233, and an elongated connecting portion 234. The welding channel 231 is correspondingly disposed to the welding path 130 of the product 100 and is generally annular in shape corresponding to the welding path 130, used to avoid the laser welding area, so that the laser can weld the product 100 along the welding channel 231.

[0029] The outer peripheral support portion 232 is located outside the welding channel 231, and the middle support portion 233 is located inside the welding channel 231. The elongated connecting portion 234 connects the outer peripheral support portion 232 and the middle support portion 233. Since the welding channel 231 needs to avoid the welding path 130, the elongated connecting portion 234 is provided corresponding to the elongated first region 140 of the product 100, thereby keeping the middle support portion 233 inside the welding channel 231 while avoiding the welding path 130.

[0030] Multiple weld point pressure blocks 24 are elastically floatingly disposed on the outer peripheral support portion 232 and arranged sequentially along the outer side of the welding channel 231. After the upper cover module 20 is closed, the multiple weld point pressure blocks 24 respectively press against the adjacent area of ​​the product 100 located outside the welding path 130. Because the weld point pressure blocks 24 can elastically float, each weld point pressure block 24 can independently make room and press against the product 100 according to the local height difference of the adjacent area outside the product 100, reducing the problem of local hard pressing or incomplete pressing. A gap can be left between adjacent weld point pressure blocks 24 to reduce movement interference between adjacent weld point pressure blocks 24.

[0031] The middle plate pressure block 25 is fitted onto the middle support portion 233 and can elastically float relative to the middle support portion 233 along the pressing direction. After the upper cover module 20 is closed, the adjacent area outside the welding path 130 is pressed by multiple welding point pressure blocks 24, and the second area 150 inside the welding path 130 is pressed by the middle plate pressure block 25, so that the product 100 is pressed and constrained on both sides of the welding path 130.

[0032] See Figures 14 to 15As shown, a guide constraint structure 26 is provided between the middle plate pressing block 25 and the middle bearing part 233. Since the middle bearing part 233 is connected to the outer peripheral bearing part 232 through the slender connecting part 234, the supporting rigidity of the slender connecting part 234 is limited. When the middle plate pressing block 25 presses against the second region 150, the reaction force of the product 100 can easily cause the middle plate pressing block 25 to be eccentrically loaded, thereby causing the middle plate pressing block 25 to wobble relative to the middle bearing part 233. The guide constraint structure 26 is used to limit the wobble of the middle plate pressing block 25 relative to the middle bearing part 233 when the middle plate pressing block 25 presses against the second region 150, so that the middle plate pressing block 25 mainly floats along the pressing direction. As a result, the middle plate pressing block 25 can press against the inner region of the welding path 130 more stably, reducing the problem of over-pressing on one side and under-pressing on the other side.

[0033] During operation, product 100 is first placed on the lower cover module 10, and the product positioning part 12 on the lower cover module 10 is used for initial positioning of product 100. Then, the upper cover module 20 is placed on top of the lower cover module 10, so that the positioning pin 13 on the lower cover plate 11 is inserted into the positioning hole 22 on the upper cover plate 21, achieving closed positioning between the upper cover module 20 and the lower cover module 10. After closing, multiple welding point pressure blocks 24 press against the adjacent area of ​​product 100 located outside the welding path 130, and the middle plate pressure block 25 presses against the second area 150 of product 100 located inside the welding path 130 and adjacent to the first area 140. Subsequently, the laser welds product 100 along the welding channel 231.

[0034] Through the above structure, the lower cover module 10 can provide support and initial positioning for the product 100, and the upper cover module 20 can accurately cover the lower cover module 10; the welding channel 231 can avoid the welding path 130 of the product 100; multiple welding point pressure blocks 24 can perform distributed elastic pressing on the adjacent area outside the welding path 130; the middle plate pressure block 25 can perform elastic pressing on the second area 150 inside the welding path 130; and the guide constraint structure 26 can reduce the risk of the middle plate pressure block 25 swaying after being subjected to eccentric load. Therefore, the fluctuation of the bonding gap near the welding path 130 of the product 100 can be reduced, the pressing uniformity can be improved, and the welding quality and sealing reliability of the mobile phone cooling plate can be improved.

[0035] See Figures 14 to 15 As shown, the guide constraint structure 26 includes a linear bearing 261 and a bushing 262. The bushing 262 is disposed in the central bearing portion 233. One end of the linear bearing 261 is disposed in the middle plate pressure block 25, and the other end is slidably inserted into the bushing 262. When the middle plate pressure block 25 floats in the pressing direction under the reaction force of the product 100, the linear bearing 261 moves relative to the bushing 262. The bushing 262 forms a radial constraint on the linear bearing 261, thereby limiting the offset of the middle plate pressure block 25 in the non-pressing direction and reducing the wobble of the middle plate pressure block 25 relative to the central bearing portion 233.

[0036] Further, see Figure 13 As shown, the middle plate pressure block 25 is provided with a countersunk hole 251 and a through hole 252 communicating with the countersunk hole 251. The linear bearing 261 includes a small-diameter guide section 2611, a limiting stage 2612, and a large-diameter mating section 2613 connected in sequence. The small-diameter guide section 2611 is inserted into the bushing 262 and is used to mate with the bushing 262 to achieve guidance. The limiting stage 2612 is provided in the through hole 252, and the outer diameter of the limiting stage 2612 is larger than the inner diameter of the bushing 262. The large-diameter mating section 2613 is accommodated in the countersunk hole 251.

[0037] When the middle plate pressing block 25 is in its initial state before pressing the product 100, the large-diameter mating section 2613 is located in the countersunk hole 251, and the lower end face of the limiting stage 2612 abuts against the top face of the bushing 262, thereby limiting the downward distance of the middle plate pressing block 25 relative to the middle bearing part 233. When the middle plate pressing block 25 presses the product 100 and is subjected to the reaction force of the product 100, the middle plate pressing block 25 can drive the linear bearing 261 to move upward relative to the bushing 262 by a certain distance, the limiting stage 2612 disengages from the top face of the bushing 262, and the small-diameter guide section 2611 still guides and slides within the bushing 262. Thus, the initial downward position of the middle plate pressing block 25 can be limited, while ensuring that the middle plate pressing block 25 has a floating stroke during pressing.

[0038] See Figure 15 As shown, the inner wall of the bushing 262 is provided with multiple spaced guide protrusions 2621, which are used to contact the linear bearing 261. By contacting the linear bearing 261 with the guide protrusions 2621, the overall contact area between the inner wall of the bushing 262 and the linear bearing 261 can be reduced, thus lowering sliding resistance. A clearance space is formed between adjacent guide protrusions 2621, which can accommodate a small amount of lubricating medium or fine impurities, reducing the risk of the linear bearing 261 getting stuck when moving within the bushing 262. When the middle plate pressure block 25 is subjected to an off-center load, causing a slight lateral force on the linear bearing 261, the guide protrusions 2621 can provide local support, reducing the risk of the linear bearing 261 and the bushing 262 seizing up over a large area. Therefore, the floating movement of the middle plate pressure block 25 is smoother, and the pressing stability is better.

[0039] See Figure 13As shown, the middle plate pressing block 25 has a cavity 253 for accommodating the central support portion 233. A pressing surface 254 is provided on the side of the middle plate pressing block 25 facing the product 100, and the pressing surface 254 surrounds the outer periphery of the cavity 253. After the upper cover module 20 is closed, the middle plate pressing block 25 presses the adjacent area of ​​the product 100 located inside the welding path 130 through the pressing surface 254, avoiding direct hard pressing on the corresponding area of ​​the cavity 253. That is, the middle plate pressing block 25 does not hard press the entire central area of ​​the product 100, but rather presses the adjacent area inside the welding path 130 through the pressing surface 254 surrounding the outer periphery of the cavity 253. The pressing surface 254 of the middle plate pressing block 25 has multiple spaced shallow pressure grooves. These shallow pressure grooves are used to create local clearance during pressing, allowing the pressing surface 254 to accommodate local fitting deviations of the product 100 and reducing the risk of local overpressure. With multiple shallow pressure grooves spaced apart, the pressing surface 254 maintains a continuous pressing action and does not divide the middle plate pressing block 25 into multiple independent pressing blocks. Therefore, while maintaining continuous pressing within the welding path 130, the pressing adaptability of the middle plate pressing block 25 is improved.

[0040] See Figures 5 to 6 As shown, a middle plate pressure block 25 is provided with a middle plate pressure block spring sealing plate 256. The middle plate pressure block spring sealing plate 256 is fixedly connected to the middle bearing part 233 by a connector (screw), and the connector passes through a clearance hole on the middle plate pressure block 25. A first spring is provided between the spring hole on the middle plate pressure block spring sealing plate 256 and the pressure block spring hole 257 on the middle plate pressure block 25. The clearance hole provides clearance space for the movement of the middle plate pressure block 25 relative to the connector, so that the middle plate pressure block 25 will not be locked by the connector. The first spring applies an elastic force to the middle plate pressure block 25 toward the product 100, so that the middle plate pressure block 25 can elastically press against the second region 150 of the product 100 when the upper cover module 20 is closed.

[0041] See Figure 11 As shown, an air inlet plate 27 is provided on the outer peripheral support part 232, and the air inlet plate 27 has an air inlet hole 271 and an air passage 272. The outer peripheral support part 232 has an air blowing hole 273, which communicates with the air inlet hole 271 and the air passage 272. The air blowing hole 273 is located between two adjacent welding point pressure blocks 24, and the opening of the air blowing hole 273 is inclined towards the corresponding welding point.

[0042] See Figures 9 to 10As shown, the outer peripheral support portion 232 is also provided with a plurality of pressure block mounting holes 235, and a plurality of weld point pressure blocks 24 are movably disposed in the corresponding pressure block mounting holes 235. Each weld point pressure block 24 includes a moving portion 241, a pressing portion 242, and a limiting ear 243. The moving portion 241 is movably disposed in the pressure block mounting hole 235, and the pressing portion 242 is located on the side of the moving portion 241 facing the product 100, and is used to press the adjacent area of ​​the product 100 located outside the welding path 130. The pressure block mounting holes 235 provide lateral limiting to the moving portion 241, allowing the weld point pressure block 24 to float along the pressing direction and restricting the weld point pressure block 24 from shifting along the non-pressing direction.

[0043] The limiting ear 243 is provided on the moving part 241 and located above the outer peripheral support part 232. It is used to cooperate with the upper surface of the outer peripheral support part 232 to limit the downward distance of the solder joint pressure block 24 and prevent the solder joint pressure block 24 from coming out of the pressure block mounting hole 235.

[0044] The movable part 241 is provided with a movable part spring hole 2411, and the air inlet plate 27 is provided with an air inlet plate spring hole 274. A second spring is disposed in the corresponding movable part spring hole 2411 and air inlet plate spring hole 274, and abuts against the air inlet plate 27 and the welding point pressure block 24. The second spring is used to provide an elastic pressing force to the welding point pressure block 24 toward the product 100.

[0045] During welding, shielding gas or purging gas enters the gas passage 272 through the air inlet 271 and is then blown towards the area near the weld point through the air outlet 273. Since the air outlet 273 is located on the outer peripheral support 232 rather than on the weld point pressure block 24, the air blowing structure does not occupy the main pressing surface of the weld point pressure block 24, nor does it affect the elastic floating of the weld point pressure block 24 along the pressing direction. The orifice of the air outlet 273 is tilted towards the corresponding weld point, allowing the airflow to be output close to the welding area to blow away welding fumes and volatiles, reducing the obstruction of the weld point area by fumes and facilitating the inspection of welding quality.

[0046] See Figure 20As shown, the lower cover module 10 is equipped with a flip-and-press mechanism 30. The flip-and-press mechanism 30 includes a flip handle 31 rotatably mounted on the lower cover module 10, and a top ball 32 and a third spring 33 are housed in the flip handle 31. The upper cover plate 21 of the upper cover module 20 is provided with an arc-shaped groove 34 that mates with the top ball 32. When the upper cover module 20 is placed on top of the lower cover module 10, the flip handle 31 is rotated to the pressing position, and the top ball 32, under the action of the third spring 33, abuts into the arc-shaped groove 34, pressing the upper cover module 20 against the lower cover module 10. When it is necessary to open the upper cover module 20, the flip handle 31 is rotated in the opposite direction, causing the top ball 32 to disengage from the arc-shaped groove 34. When the top ball 32 mates with the arc-shaped groove 34, the third spring 33 provides an elastic preload, keeping the flip handle 31 stable in the pressing position and preventing it from loosening due to slight vibrations. This allows for rapid clamping and release between the upper cover module 20 and the lower cover module 10, facilitating material feeding, welding, and material removal.

[0047] See Figures 16 to 19 As shown, the mobile phone cooling plate welding device also includes an auxiliary cover plate 40 fixed to the lower cover module 10 by connectors (such as screws). The auxiliary cover plate 40 is provided with a plurality of lateral positioning components 41, which are used to position the side of the second plate 120 of the product 100. Each lateral positioning component 41 includes a moving groove 411, a lateral positioning block 412, a pull rope 413, and a fourth spring 414. The pull rope 413 is made of steel wire rope. The auxiliary cover plate 40 is provided with a clearance hole to avoid the product 100. The moving groove 411 is opened on the auxiliary cover plate 40 and is provided along the edge area of ​​the clearance hole. The lateral positioning block 412 is movably disposed in the moving groove 411. The fourth spring 414 abuts against the side of the lateral positioning block 412 away from the product 100. One end of the pull rope 413 is connected to the lateral positioning block 412. The lower cover module 10 has a limiting rod 42 and a stop plate 43 on its side. The limiting rod 42 is connected to the other end of a plurality of pull ropes 413, and the stop plate 43 has a first stop groove 431 and a second stop groove 432. Furthermore, the back of the auxiliary cover plate 40 has a plurality of pull rope grooves, which are used to guide the corresponding pull ropes 413 to move along a predetermined path and reduce interference between the multiple pull ropes 413.

[0048] When the limiting rod 42 is in the first stop groove 431, the pull rope 413 pulls the lateral positioning block 412, causing the lateral positioning block 412 to be in the retracted position. At this time, the lateral positioning block 412 avoids the insertion path of the first plate 110 and the removal path of the welded product 100. When the limiting rod 42 is in the second stop groove 432, the pull rope 413 is released, and the lateral positioning block 412 moves toward the side of the product 100 under the action of the fourth spring 414, and abuts against the closed end 4111 of the moving groove 411, thereby being in the positioning position. When the lateral positioning block 412 is in the positioning position, it is used as a lateral positioning reference for the second plate 120, limiting and positioning the side of the second plate 120, so that the second plate 120 maintains a predetermined stacking position relative to the first plate 110. Since the positioning position of the lateral positioning block 412 is defined by the closed end 4111 of the moving groove 411, rather than solely by the length of the pull rope 413, the lateral positioning block 412 can maintain a stable positioning reference even if there are changes in the tension of the pull rope 413, changes in the elasticity of the fourth spring 414, or differences in friction. This improves the lateral positioning consistency of the second plate 120 relative to the first plate 110 and reduces the impact of manual placement deviations on welding quality.

[0049] See Figures 1 to 21 As shown, this embodiment of the invention also discloses a method for welding a mobile phone cooling plate, which is implemented using the above-mentioned mobile phone cooling plate welding device and includes the following steps: Before welding, the lateral positioning block 412 is switched to the retracted position. Specifically, the limiting rod 42 is placed in the first stop groove 431, and the limiting rod 42 pulls the lateral positioning block 412 through the pull rope 413, causing the lateral positioning block 412 to move along the moving groove 411 to the side away from the product 100. At this time, the lateral positioning block 412 avoids the placement path of the first plate 110, making it easier to place the first plate 110 onto the lower cover module 10.

[0050] After the first plate 110 is placed, the lateral positioning block 412 is switched to the positioning position. Specifically, the limiting rod 42 is switched from the first stop groove 431 to the second stop groove 432, the pull of the pull rope 413 on the lateral positioning block 412 is reduced or released, and the lateral positioning block 412 moves along the moving groove 411 toward the side of the product 100 under the action of the fourth spring 414, and abuts against the closed end 4111 of the moving groove 411. At this time, the closed end 4111 of the moving groove 411 limits the final position of the lateral positioning block 412, so that the lateral positioning block 412 is in a stable positioning position.

[0051] Subsequently, the second plate 120 is placed on the first plate 110. Since the position of the lateral positioning block 412 is defined by the closed end 4111 of the moving groove 411, the second plate 120 can be stacked on the first plate 110 with a stable lateral reference, reducing lateral deviations caused by manual placement or changes in the tension of the pull rope 413.

[0052] After the second plate 120 is positioned, the top cover module 20 is closed. After the top cover module 20 is closed, multiple welding point pressure blocks 24 press against the adjacent area of ​​the product 100 located outside the welding path 130, and the middle plate pressure block 25 presses against the adjacent area of ​​the product 100 located inside the welding path 130 under the constraint of the guide constraint structure 26. Thus, the product 100 is pressure-constrained on both the inner and outer sides of the welding path 130, so that the first plate 110 and the second plate 120 remain in contact before welding.

[0053] In the pressing state, the laser welds the product 100 along the welding channel 231. During the welding process, the weld point pressing block 24 and the middle plate pressing block 25 continuously press the area near the welding path 130, reducing the gap fluctuation between the first plate 110 and the second plate 120 and improving the bonding stability during the welding process.

[0054] After welding is completed, the lateral positioning block 412 is switched back to the retracted position. Specifically, the limiting rod 42 is placed in the first stop groove 431, and the lateral positioning block 412 is pulled back by the pull rope 413. Then, the upper cover module 20 is opened, and the welded product 100 is taken out. After the lateral positioning block 412 retracts, it can avoid the product 100 removal path, reducing the risk of interference or scratches between the edge of the product 100 and the lateral positioning block 412 when removing the part.

[0055] Using the above method, when the first plate 110 is placed, the lateral positioning block 412 retracts to avoid it; when the second plate 120 is placed, the lateral positioning block 412 extends and forms a stable positioning reference with the closed end 4111 of the moving groove 411. During welding, the welding point pressure block 24 and the middle plate pressure block 25 respectively press against the areas on both sides of the welding path 130. When removing the part, the lateral positioning block 412 retracts again to avoid it. Therefore, the stacking positioning consistency of the first plate 110 and the second plate 120 can be improved, the fluctuation of the fitting gap near the welding path 130 can be reduced, and the welding quality and sealing reliability of the mobile phone cooling plate can be improved.

[0056] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A welding device for a mobile phone cooling plate, characterized in that: The lower cover module is used to support the product; The upper cover module is capable of covering the lower cover module. The upper cover module includes a cover plate, which has a welding channel corresponding to the welding path of the product, an outer peripheral support portion located outside the welding channel, a middle support portion located inside the welding channel, and an elongated connecting portion connecting the outer peripheral support portion and the middle support portion. The elongated connecting portion is provided corresponding to a first area of ​​the product. Multiple welding point pressure blocks are elastically floatingly disposed on the outer peripheral support part and arranged sequentially along the outside of the welding channel for pressing the product in the adjacent area outside the welding path; A middle plate pressing block is sleeved on the middle support part and can elastically float relative to the middle support part along the pressing direction. It is used to press the second area of ​​the product. The second area is located inside the welding path and is adjacent to the first area. A guide constraint structure is provided between the middle plate pressing block and the middle support part. The guide constraint structure is used to limit the middle plate pressing block from swinging relative to the middle support part when the middle plate pressing block presses the second area.

2. The mobile phone cooling plate welding device according to claim 1, characterized in that: The guiding constraint structure includes a linear bearing and a bushing. The bushing is disposed in the middle bearing portion. One end of the linear bearing is disposed in the middle plate pressure block, and the other end is slidably inserted into the bushing to limit the middle plate pressure block from shifting in the non-pressing direction and from swaying relative to the middle bearing portion.

3. The mobile phone cooling plate welding device according to claim 2, characterized in that: The middle plate pressure block is provided with a countersunk hole and a through hole communicating with the countersunk hole; the linear bearing includes a small-diameter guide section, a limiting platform stage and a large-diameter mating section connected in sequence; The small-diameter guide section is inserted into the bushing; the limiting platform stage is disposed in the through hole, and the outer diameter of the limiting platform stage is larger than the inner diameter of the bushing; the large-diameter mating section is accommodated in the countersunk hole. When the middle plate pressing block is in the initial state of not pressing the product, the lower end face of the limiting stage abuts against the top end face of the bushing to limit the downward distance of the middle plate pressing block relative to the middle bearing part.

4. The mobile phone cooling plate welding device according to claim 2, characterized in that: The inner wall of the bushing is provided with a plurality of spaced guide protrusions, which are used to contact the linear bearing.

5. The mobile phone cooling plate welding device according to claim 1, characterized in that: The middle plate pressing block has a cavity for accommodating the middle bearing part. The middle plate pressing block has a pressing surface on the side facing the product, and the pressing surface is arranged around the outer periphery of the cavity. The pressing surface of the middle plate pressing block is recessed with a plurality of spaced shallow pressing grooves.

6. The mobile phone cooling plate welding device according to claim 1, characterized in that: The middle plate pressure block is provided with a middle plate pressure block spring sealing plate, and the middle plate pressure block spring sealing plate is fixedly connected to the middle bearing part through a connector passing through the clearance hole on the middle plate pressure block; a first spring is provided between the middle plate pressure block spring sealing plate and the middle plate pressure block.

7. The mobile phone cooling plate welding device according to claim 1, characterized in that: An air inlet plate is provided on the outer peripheral support part, and the air inlet plate is provided with an air inlet hole and an air passage; the outer peripheral support part is provided with an air blowing hole, which is connected to the air inlet hole and the air passage, and the air blowing hole is located between two adjacent welding point pressure blocks, and the opening of the air blowing hole is inclined towards the corresponding welding point; a second spring is provided between the air inlet plate and the welding point pressure block.

8. The mobile phone cooling plate welding device according to claim 1, characterized in that: The lower cover module is provided with a flip-and-press mechanism, which includes a flip handle rotatably disposed on the lower cover module. The flip handle houses a top ball and a third spring. The upper cover module is provided with an arc-shaped groove that mates with the top ball. When the flip handle is flipped to the pressing position, the top ball abuts into the arc-shaped groove to press the upper cover module against the lower cover module.

9. The mobile phone cooling plate welding apparatus according to any one of claims 1 to 8, characterized in that: It also includes an auxiliary cover plate fixed to the lower cover module, the auxiliary cover plate being provided with a plurality of lateral positioning components for positioning the second plate side of the product; The lateral positioning assembly includes a moving groove, a lateral positioning block, a pull rope, and a fourth spring; the lateral positioning block is movably disposed in the moving groove, the fourth spring abuts against the side of the lateral positioning block away from the product, and one end of the pull rope is connected to the lateral positioning block; a limiting rod and a stop plate are provided on the side of the lower cover module, the limiting rod is connected to the other end of the plurality of pull ropes, and the stop plate is provided with a first stop groove and a second stop groove; When the limiting rod is in the first stop groove, the pull rope pulls the lateral positioning block to the retracted position; when the limiting rod is in the second stop groove, the lateral positioning block abuts against the closed end of the moving groove under the action of the fourth spring, so that the lateral positioning block is in the positioning position.

10. A method for welding a mobile phone cooling plate, characterized in that: The mobile phone cooling plate welding apparatus according to claim 9 includes: Switch the lateral positioning block to the retracted position, place the first plate of the product on the lower cover module and position it; Switch the lateral positioning block to the positioning position so that the lateral positioning block abuts against the closed end of the moving groove; Using the lateral positioning block in its positioning position as a lateral positioning reference, the second plate of the product is placed in. The upper cover module is closed, so that the multiple welding point pressing blocks press the product in the adjacent area outside the welding path, and the middle plate pressing block presses the product in the adjacent area inside the welding path under the constraint of the guide constraint structure. Laser welding is performed on the product along the welding channel; After welding is completed, switch the lateral positioning block to the retracted position, open the upper cover module, and take out the welded product.

Images