Welding fixtures and welding equipment for heat dissipation devices

Abstract

This utility model discloses a welding fixture and welding equipment for a heat dissipation device. It can directly share the existing furnace temperature, complete welding in one pass through the furnace, and the fixture cools down rapidly, leaving almost no flux residue after mold opening. The welding fixture for the heat dissipation device includes an upper fixture and a lower fixture. The top of the lower fixture is provided with a receiving groove for placing the heat dissipation device. At least one side wall of the lower fixture has multiple first air guide holes that communicate with the receiving groove. The upper and lower fixtures are stacked and locked together during mold processing.

Description

Technical Field

[0001] This utility model relates to the field of welding fixture technology, and in particular to a welding fixture and welding equipment for a heat dissipation device. Background Technology

[0002] A vapor chamber is a heat dissipation device widely used in chips, electronic devices, and other applications, offering excellent heat dissipation performance. A vapor chamber typically consists of an upper cover and a lower cover, forming a vacuum chamber. The chamber is equipped with a seal, an air extraction port, and a working fluid injection port. Therefore, the sidewalls of the upper and lower cover plates in contact with each other require sealing; poor sealing directly affects the vapor chamber's performance. Current technology uses a fixture to weld the upper and lower cover plates together with flux. The fixture fixes the upper and lower cover plates and applies pressure, then places the entire fixture into a furnace. Heat from the furnace is transferred to the fixture, and welding begins when the flux melts. However, existing fixtures require a shared furnace temperature, and when both the fixture and the product are large, at least two reflows are needed to complete the welding. After removal from the furnace, the fixture cools slowly and requires complete cooling before it can be opened, significantly impacting production efficiency. Furthermore, some flux tends to adhere to the product surface, requiring manual wiping, increasing operational steps and costs.

[0003] Therefore, there is an urgent need to provide a welding fixture and welding equipment that can directly share the existing furnace temperature, complete welding in one pass through the furnace, and allow the fixture to cool down rapidly with almost no flux residue after mold opening, in order to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of this invention is to provide a welding fixture that can directly share the existing furnace temperature, complete welding in one pass through the furnace, and has rapid cooling, leaving almost no flux residue after mold opening.

[0005] Another objective of this invention is to provide a welding device, including a welding fixture that can directly share the existing furnace temperature, complete welding in one pass through the furnace, and has rapid cooling of the fixture, leaving almost no flux residue after mold opening.

[0006] To achieve the first objective mentioned above, this utility model provides a welding fixture for a heat dissipation device, which includes an upper fixture and a lower fixture. The top of the lower fixture is provided with a receiving groove for placing the heat dissipation device. At least one side wall of the lower fixture has a plurality of first air guide holes that are connected to the receiving groove. The upper fixture and the lower fixture are stacked and locked together during mold processing.

[0007] Preferably, the first air guide hole is arranged on the side wall along the length of the side wall.

[0008] Preferably, the first air guide holes are divided into multiple groups on the side wall, with a certain distance between adjacent groups of first air guide holes, and each group of first air guide holes includes at least one row of multiple first air guide holes.

[0009] Preferably, the heat dissipation device includes a heat dissipation component, and the lower fixture has a receiving groove at the bottom of the receiving groove for placing the heat dissipation component. At least one side wall of the lower fixture has a plurality of second air guide holes that communicate with the receiving groove.

[0010] Preferably, the second air guide hole is located below the first air guide hole. The second air guide hole is divided into several groups on the side wall. There is a certain distance between two adjacent groups of second air guide holes. Each group of second air guide holes includes at least two rows of multiple second air guide holes. The diameter of the second air guide hole is larger than the diameter of the first air guide hole.

[0011] Preferably, the bottom side of the upper fixture is provided with a protruding structure for pressing the edge of the heat dissipation device. The protruding structure is arranged in a ring shape and passes into the receiving groove when the upper fixture and the lower fixture are joined together for processing.

[0012] Preferably, the lower fixture has a socket in the receiving groove for inserting and positioning the pins of the heat dissipation device.

[0013] Preferably, the top sidewall of the upper fixture is provided with multiple upper clearance grooves, and the bottom sidewall of the lower fixture is provided with multiple lower clearance grooves.

[0014] Preferably, the upper fixture has an upper fixing through hole near its four sides, and the lower fixture has a lower fixing through hole near its four sides. When the upper and lower fixtures are closed together, a locking member is inserted into the upper and lower fixing through holes to lock them in place.

[0015] To achieve the second objective mentioned above, this utility model also provides a welding device, which includes the welding fixture for the heat dissipation device described above.

[0016] Compared with the prior art, the welding fixture for heat dissipation devices of this utility model includes an upper fixture and a lower fixture. The top of the lower fixture is provided with a receiving groove for placing the heat dissipation device, and at least one side wall of the lower fixture has multiple first air guide holes that communicate with the receiving groove. The upper and lower fixtures are stacked and locked together during mold processing. During welding, hot air from the furnace can flow into the receiving groove through the first air guide holes, directly flowing to the heat dissipation device, improving the heating efficiency of the heat dissipation device, accelerating its heating, and allowing the flux to quickly reach its melting point, achieving rapid welding. Compared with the prior art, when using the welding fixture of this utility model to weld heat dissipation devices, the heat dissipation device, in addition to being heated by physical contact with the welding fixture, can also be heated by the hot air flowing in through the first air guide holes, achieving a dual heating effect, effectively improving heating efficiency, thereby improving welding efficiency. This allows the use of existing furnace temperatures, and even if the welding fixture and product are large, welding can be completed in one pass. During welding, the flue gas generated can be discharged from the welding fixture through the first air duct after evaporation, avoiding the subsequent manual rosin wiping process and reducing process and time costs. After the welding fixture is opened, there is almost no rosin residue on the surface of the heat dissipation device, and the product surface has a good appearance. In addition, after the welding fixture is removed from the furnace, the heat from the heat dissipation device and the welding fixture can be transferred outward through the first air duct, improving the cooling efficiency of the welding fixture and reducing the waiting time for mold opening. Attached Figure Description

[0017] Figure 1 This is a perspective view of the welding fixture for the heat dissipation device of this utility model when the upper fixture and the lower fixture are stacked together and the mold is closed.

[0018] Figure 2 This is a perspective view of the welding fixture for the heat dissipation device of this utility model after the upper and lower fixtures are separated and molded.

[0019] Figure 3 This is a perspective view of the lower fixture of this utility model.

[0020] Figure 4 This is the front view of the lower fixture of this utility model.

[0021] Figure 5 This utility model relates to the lower jig along... Figure 4 The sectional view obtained after cutting along line segment AA.

[0022] Figure 6 This is a perspective view of the upper fixture of this utility model. Detailed Implementation

[0023] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0024] like Figures 1 to 5 As shown, this utility model discloses a welding fixture 100 for a heat dissipation device, including an upper fixture 10 and a lower fixture 20. The top of the lower fixture 20 is provided with a receiving groove 21 for placing the heat dissipation device. At least one side wall of the lower fixture 20 has a plurality of first air guide holes 22 penetrating through it, and the first air guide holes 22 communicate with the receiving groove 21. The upper fixture 10 and the lower fixture 20 are stacked and locked together during mold-fitting processing.

[0025] During processing, the heat dissipation device is placed in the receiving groove 21. After the upper fixture 10 and the lower fixture 20 are closed together, the upper fixture 10 and the lower fixture 20 are stacked and locked. Then, the welding fixture 100 is placed in the furnace. After the welding fixture absorbs the heat in the furnace, it transfers the heat to the heat dissipation device. When the welding position of the heat dissipation device is heated to the point where the flux melts, welding begins.

[0026] During welding, the welding fixture 100 of this invention allows hot air from the furnace to flow into the receiving tank 21 through the first air guide hole 22, directly flowing to the heat dissipation device. This improves the heating efficiency of the heat dissipation device, accelerates its heating, and allows the flux to quickly reach its melting point, achieving rapid welding. Compared to existing technologies, when welding the heat dissipation device using the welding fixture 100 of this invention, the device receives heat not only through physical contact with the welding fixture 100 but also through the hot air flowing in through the first air guide hole 22, achieving a dual heating effect. This effectively improves heating efficiency and welding efficiency, allowing the existing furnace temperature to be shared. Even if the welding fixture 100 and the product are large, welding can be completed in one pass. During welding, the waste gas generated by the flux evaporates and can be discharged from the welding fixture 100 through the first air guide hole 22, avoiding the subsequent manual rosin wiping process, thus reducing process and labor costs. After the welding fixture 100 is opened, the surface of the heat dissipation device is almost free of rosin, resulting in a good product appearance. In addition, after the welding fixture 100 is removed from the furnace, the heat dissipation device and the heat inside the welding fixture 100 can be transferred outward through the first air guide hole 22, which improves the cooling efficiency of the welding fixture 100 and reduces the waiting time for mold opening.

[0027] Preferably, the lower fixture 20 has a square structure, with multiple first air guide holes 22 penetrating through its four side walls, but it is not limited to this.

[0028] Flux is composed of rosin resin, surfactants, additives, and some organic solvents. Rosin resin is used to ensure a smooth soldering process. Rosin resin will naturally evaporate at higher temperatures.

[0029] like Figures 1 to 5As shown, preferably, the first air guide hole 22 is a circular through hole, but it can also be square, polygonal, etc., as needed. In the embodiment provided by this utility model, the heat dissipation device is a heat spreader 200, and the upper cover plate and the lower cover plate of the heat spreader 200 need to be welded to their surrounding sides. Of course, depending on actual needs, the heat spreader 200 can also be set as a heat pipe, etc.

[0030] like Figures 1 to 5 As shown, the first air guide holes 22 are arranged on the side wall along the length of the side wall to exhaust air, so that a considerable number of first air guide holes 22 are arranged to facilitate rapid and uniform heat conduction. Preferably, the first air guide holes 22 are located at the upper end of the side wall. In the embodiment provided by this utility model, the receiving groove 21 is square, and the rows of first air guide holes 22 arranged on the side wall can uniformly and quickly conduct heat to the surrounding sides of the heat spreader 200.

[0031] like Figures 1 to 5 As shown, the first air guide holes 22 are divided into multiple groups on the side wall (in the embodiment provided by this utility model, they are divided into 4 groups, but can be increased or decreased as needed). There is a certain distance between two adjacent groups of first air guide holes 22, and each group of first air guide holes 22 includes at least one row of multiple first air guide holes 22.

[0032] like Figures 1 to 5 As shown, the heat dissipation device also includes a heat dissipation component. The lower fixture 20 has a receiving groove 23 at the bottom of the receiving groove 21 for placing the heat dissipation component. At least one side wall of the lower fixture 20 has a plurality of second air guide holes 24 penetrating through it, and the second air guide holes 24 are connected to the receiving groove 23. The second air guide holes 24 have basically the same function as the first air guide holes 22, which can both allow hot air to flow through for convenient heating and heat dissipation, and facilitate the evaporation of flux inside the welding fixture 100. Preferably, the heat dissipation component is a fin structure 210, and the heat of the heat spreader 200 can be dissipated to the outside through the fin structure 210. The second air guide holes 24 are circular through holes, but they can also be square, polygonal, etc., as needed. In the embodiment provided by the utility model, the second air guide holes 24 are only provided on one side wall of the lower fixture 20, but they can be provided on other side walls as needed.

[0033] like Figures 1 to 5 As shown, the second air guide hole 24 is located below the first air guide hole 22. The second air guide hole 24 is divided into several groups on the side wall, with a certain distance between adjacent groups of second air guide holes 24. Each group of second air guide holes 24 includes two rows of multiple second air guide holes 24 to facilitate heat conduction and exhaust. Preferably, the diameter of the second air guide hole 24 is larger than the diameter of the first air guide hole 22.

[0034] like Figures 1 to 6As shown, the bottom side of the upper fixture 10 is provided with a protruding structure 11 for pressing the edge of the heat dissipation device (i.e., the heat spreader 200). The protruding structure 11 is arranged in a ring shape and passes into the receiving groove 21 during the mold-fitting process of the upper fixture 10 and the lower fixture 20. The protruding structure 11 can apply greater compressive force to the edge of the heat spreader 200, ensuring the welding quality of the four sides of the heat spreader 200.

[0035] like Figures 1 to 5 As shown, to enhance the positioning of the heat exchange plate 200 placed in the receiving groove 21, the upper fixture 10 has insertion holes 211 in the receiving groove 21 for inserting and positioning the heat dissipation device's pins 220. Pins 220 are provided at all four corners of the heat exchange plate 200, and correspondingly, insertion holes 211 are provided at all four corners of the receiving groove 21.

[0036] like Figures 1 to 6 As shown, the top sidewall of the upper fixture 10 is provided with multiple upper clearance grooves 12, and the bottom sidewall of the lower fixture 20 is provided with multiple lower clearance grooves 25. The upper clearance grooves 12 and lower clearance grooves 25 are provided to prevent the surface of the product from overheating and causing expansion and deformation. Preferably, the upper clearance grooves 12 and / or the lower clearance grooves 25 are arranged in a square shape, but it is not limited to this.

[0037] like Figures 1 to 6 As shown, the upper fixture 10 has upper fixing through holes 13 near its four sides, and the lower fixture 20 has lower fixing through holes 26 near its four sides. When the upper fixture 10 and the lower fixture 20 are closed, they are locked together by a locking element (not shown) that passes through the upper fixing through holes 13 and the lower fixing through holes 26, maintaining a certain clamping force on the heat exchange plate 200 throughout the welding process. Preferably, multiple upper fixing through holes 13 and lower fixing through holes 26 are provided. The locking element can be a screw or similar material.

[0038] In addition, a pin structure 14 is provided at the two corners of the bottom side of the upper fixture 10, and an insertion hole 27 is provided at the corresponding two corners of the top side of the lower fixture 20. The pin structure 14 is inserted into the insertion hole 27 to ensure the precise alignment of the upper fixture 10 and the lower fixture 20.

[0039] The welding fixture 100 for heat dissipation devices of this utility model can be used in welding equipment (not shown in the figure). The welding equipment includes a sintering furnace. After the upper fixture 10 and the lower fixture 20 are closed and locked together, the welding fixture 100 can be placed into the sintering furnace for welding processing.

[0040] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A welding fixture for a heat dissipation device, characterized in that: The device includes an upper fixture and a lower fixture. The top of the lower fixture is provided with a receiving groove for placing a heat dissipation device. At least one side wall of the lower fixture has a plurality of first air guide holes that are connected to the receiving groove. The upper fixture and the lower fixture are stacked and locked together when they are molded together.

2. The welding fixture for a heat dissipation device according to claim 1, characterized in that, The first air guide hole is arranged along the length of the side wall.

3. The welding fixture for a heat dissipation device according to claim 1, characterized in that, The first air guide holes are divided into multiple groups on the side wall, and there is a certain distance between two adjacent groups of the first air guide holes. Each group of the first air guide holes includes at least one row of multiple first air guide holes.

4. The welding fixture for a heat dissipation device according to claim 1, characterized in that, The heat dissipation device includes a heat dissipation component. The lower fixture has a receiving groove at the bottom of the receiving groove for placing the heat dissipation component. At least one side wall of the lower fixture has a plurality of second air guide holes that communicate with the receiving groove.

5. The welding fixture for a heat dissipation device according to claim 4, characterized in that, The second air guide hole is located below the first air guide hole. The second air guide hole is divided into several groups on the side wall. There is a certain distance between two adjacent groups of the second air guide hole. Each group of the second air guide hole includes at least two rows of multiple second air guide holes. The diameter of the second air guide hole is larger than the diameter of the first air guide hole.

6. The welding fixture for a heat dissipation device according to claim 1, characterized in that, The bottom side of the upper fixture is provided with a protruding structure for pressing the edge of the heat dissipation device. The protruding structure is arranged in a ring shape and is inserted into the receiving groove when the upper fixture and the lower fixture are molded together.

7. The welding fixture for a heat dissipation device according to claim 1, characterized in that, The lower fixture has a plug hole in the receiving groove for the pins of the heat dissipation device to be inserted and positioned.

8. The welding fixture for a heat dissipation device according to claim 1, characterized in that, The upper fixture has multiple upper clearance grooves on its top sidewall, and the lower fixture has multiple lower clearance grooves on its bottom sidewall.

9. The welding fixture for a heat dissipation device according to claim 1, characterized in that, The upper fixture has an upper fixing through hole near its four sides, and the lower fixture has a lower fixing through hole near its four sides. When the upper fixture and the lower fixture are closed together, a locking member is inserted into the upper fixing through hole and the lower fixing through hole to lock them together.

10. A welding device, characterized in that, Includes the welding fixture for heat dissipation devices as described in any one of claims 1-9.

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