TW202006307A - Heat dissipation component and manufacturing method thereof - Google Patents

Abstract

A heat dissipation component and a manufacturing method thereof. The heat dissipation component has a main body. The main body has a first metal plate body and a second metal plate body. The first and second metal plate bodies together define a chamber. A capillary structure layer is disposed in the chamber and a working fluid is filled in the chamber. An outer periphery of the chamber of the main body has a flange section. The flange section has a sintered welding section. The sintered welding section is perpendicularly connected with the first and second metal plate bodies. The manufacturing method of the heat dissipation component employs fillet welding to directly perpendicularly weld and connect the first and second metal plate bodies so as to enhance the connection and sealing of the welded first and second metal plate bodies.

Description

Radiating element and its manufacturing method

A heat dissipation element and a manufacturing method thereof, in particular to a heat dissipation element and a method for manufacturing the heat dissipation element, which improve the bonding and sealing of the heat dissipation element.

The temperature equalizing plate or flat plate heat pipe is generally used as a heat conduction element. These two heat conduction elements have the characteristics of high thermal conductivity. Because the internal vacuum sealed chamber is filled with working liquid, the conversion of the two-phase characteristics of gas and liquid can quickly achieve the effect of heat conduction. , The temperature equalizing plate and the flat type heat pipe are superimposed through at least two metal plates above and below, and then the edge sealing, water injection and vacuum sealing are performed. The most commonly used materials for the temperature equalizing plate and the flat type heat pipe are copper, aluminum, Stainless steel and other metal materials, among which copper is most commonly used, is most commonly used because of its high thermal conductivity. Most temperature-averaged plates and flat-plate heat pipes mainly use diffusion bonding (Diffusion Bonding), brazing and spot welding for edge sealing, while diffusion bonding (Biffusion Bonding) and brazing (Brazing) are suitable for most materials However, if the combination of two different materials, such as copper and aluminum or copper and stainless steel, the diffusion bonding method is not applicable. The disadvantage of spot welding is that although it can be processed continuously but cannot be completely sealed, if it is used in the edge-sealing work, the vacuum degree of the internal chamber cannot be maintained and the working liquid is likely to leak due to poor sealing. Then lose the heat conduction effect. There are also companies who perform resistance welding by using resistance wheel welding. The current temperature-averaged plate or flat plate heat pipe of resistance wheel welding is mainly composed of an upper plate 3a (smaller surface area) and a lower plate 3b (larger surface area). After overlapping with each other, perform resistance wheel welding (as shown in Figures 1 and 1a) by overlapping the right and left corners of the upper and lower plates 3a and 3b (as shown in Figures 1 and 1a). Although resistance wheel welding can provide inconsistent sizes Welding combination of upper and lower plates 3a, 3b, but the welding method and material joints of conventional resistance wheel welding still have shortcomings, such as upper and lower plates 3a, 3b in order to form a vertical corner portion that can provide welding, choose the upper plate 3a It is smaller than the lower plate 3b, so the upper and lower plates 3a and 3b must be accurately aligned, and even a special jig must be used to position the upper and lower plates 3a and 3b. In addition, when the welding path of resistance wheel welding meets rounded corners, the path must be slowly corrected from a straight line to an arc, and multiple short straight lines are used to piece together into an arc path, so the resistance wheel welding The parts are repeated or the residence time is increased, the material is excessively melted or even destroyed to the capillary structure inside the temperature equalizing plate or flat plate heat pipe or the inner cavity is reduced, and in order to form a weldable vertical corner, the shape and size must be selected The difference between the upper and lower plates 3a, 3b makes the outer lip of the lower plate 3b prone to excess and ineffective lips, resulting in the disadvantage of waste of material. The conventional knowledge has the following disadvantages: 1. Waste of materials; 2. Poor airtightness; 3. Additional positioning is required; 4. Different materials are not easy to combine.

Secondly, in order to solve the above-mentioned shortcomings of the conventional technology, the main object of the present invention is to provide a heat dissipating element with better bonding and airtightness. Another object of the present invention is to provide a method for manufacturing a heat dissipating element that can improve the uniformity and tightness of a temperature equalizing plate. To achieve the above purpose, the present invention provides a heat dissipation element, which includes: a body; the body has a first metal plate body and a second metal plate body, and the first and second metal plate bodies jointly define a A cavity, the surface of the cavity has at least one capillary structure layer and is filled with a working liquid, the outer periphery of the body cavity has a lip portion, the lip portion has a sintered welding portion, and the sintered welding portion is vertically connected to the first 2. Two metal plates. To achieve the above purpose, the present invention provides a method for manufacturing a heat dissipating element, which includes the following steps: providing a first metal plate body and a second metal plate body; one of the first and second metal plate bodies A capillary structure is formed on the side; the first and second metal plates are stacked correspondingly, and through resistance wheel welding, the edges corresponding to the first and second metal plates corresponding to the overlapping are vertically sealed and reserved 1. Water injection and pumping area; perform vacuuming and water injection operations, and finally seal the water injection and pumping area through resistance wheel welding. The invention mainly improves the lack of poor bonding and tightness of the temperature equalizing plate by improving the welding angle structure and method of the resistance wheel welding and the first and second metal plate bodies.

Please refer to Figs. 2 and 3, which are three-dimensional exploded and assembled views of the first embodiment of the heat dissipation element of the present invention. As shown in the figure, the heat dissipation element includes: a body; the body 1 has a first Metal plate body 1a and a second metal plate body 1b, the material of the first and second metal plate bodies 1a, 1b is gold, silver, iron, copper, aluminum, commercial pure titanium, stainless steel or other metals with thermal conductivity In any one of them, the first and second metal plates 1a, 1b together define a closed chamber 1e, and the surface of the closed chamber 1e has at least one capillary structure 1d (which may be a sintered powder body or a fiber body or a grid) Any one of the body or the groove), the capillary structure 1d is selected to be provided in any one of the first and second metal plate bodies 1a, 1b, the sealed chamber 1e is filled with a working liquid 1g, and the body 1 is closed chamber The outer edge of the chamber 1e has a lip 1h, the lip 1h has a sintered weld 1i, the sintered weld 1i vertically connects the first and second metal plate bodies 1a, 1b, and the sintered weld 1i penetrates vertically The entire thickness of the first metal plate body 1a extends to one third to two thirds of the thickness of the second metal plate body 1b. The body 1 has a support structure 1c, which can be a support member that is deformed by external force or processed by pin cutting or through an external element as a support. The pin cutting process is selected from the first and second One side of any one of the metal plate bodies 1a, 1b forms a protruding structure through a pin cutting method (such as milling) to support the other plate body; the externally deformed support structure 1c is selected for this A supporting structure 1c formed by applying an external force to one side of any one of the first and second metal plate bodies 1a and 1b and recessing the other side; the additional element is transmitted through the first and second metal plate bodies 1a and 1b Setting a supporting body such as a supporting column between the two as the supporting structure 1c is not limited. Please refer to FIG. 4, which is an exploded perspective view of the second embodiment of the heat dissipating element of the present invention. As shown in the figure, the part of the description of this embodiment is the same as the aforementioned first embodiment, so it will not be repeated here. The difference between this embodiment and the foregoing first embodiment is that a capillary structure 3 is placed between the first and second metal plates. The capillary structure in this step is a single structure, and the capillary structure 3 is disposed on the Between the first and second metal plate bodies 1a, 1b, the capillary structure 3 is any one of a sintered powder plate body or a fiber body or a grid body or a wave plate or a plate body with a plurality of grooves, and penetrates through the The capillary structure 3 can provide auxiliary capillary force and increase the efficiency of vapor-liquid circulation. Please refer to FIG. 5, which is a flow chart of the steps of the first embodiment of the manufacturing method of the heat dissipating element of the present invention, and also refer to the processing schematic diagrams of FIGS. 6 and 7. As shown in the figure, the manufacturing method of the heat dissipating element of the present invention includes the following Steps: S1: providing a first metal plate body and a second metal plate body; providing a first metal plate body 1a and a second metal plate body 1b, the first and second metal plate bodies 1a, 1b are the same size Or any one of them, the first and second metal plates 1a, 1b can be any one of copper, aluminum, stainless steel, titanium alloy, and commercial pure titanium. In this embodiment, the combination of commercial pure titanium and copper is selected as The embodiments are described but not limited. S2: forming a capillary structure on one side of any one of the first and second metal plate bodies; forming a capillary structure on one side corresponding to any one or any one of the first and second metal plate bodies 1a, 1b 1d, the capillary structure 1d is any one of sintered powder, mesh body, groove or fiber body. S3: The first and second metal plates are stacked correspondingly, and through resistance wheel welding, the edges corresponding to the first and second metal plates corresponding to the stacked portions are vertically sealed and a water injection is reserved for air extraction Area; the aforementioned first and second metal plates 1a, 1b are stacked correspondingly between them to form a sealed chamber 1e, and the outer edges of the first and second metal plates 1a, 1b correspondingly overlap Through the combination of resistance wheel welding, when performing resistance wheel welding, the resistance wheel welding machine is mainly arranged perpendicular to the first and second metal plates 1a, 1b, so that the resistance wheel welding machine 2 The generated discharge melt penetrates vertically into the first and second metal plate bodies 1a, 1b, and directly penetrates the entirety of the first metal plate body 1a provided on the upper part and then penetrates the lower part of the first metal plate body 1a The thickness of the second metal plate body 1b is about one third to two thirds, and finally the area 1f to be filled with water is pumped and the other parts are closed, and the resistance wheel welding work is preferably based on this Resistance wheel welding machine 2 and the first and second metal plates 1a and 1b are protected by inert gas through argon gas to avoid oxidation reaction during resistance wheel welding. The working environment of resistance wheel welding can also be set at Carried out under vacuum to avoid contamination or oxidation during welding. S4: Carry out vacuuming and water injection operations, and finally seal the water injection and suction area through resistance wheel welding. Carry out suction and water injection, vacuumize and inject the working liquid into the first and second metal plates 1a, 1b after edge banding, and finally perform the same reserved water injection and suction area 1f through resistance wheel welding Closed. Please refer to FIG. 8, which is a flow chart of the steps of the second embodiment of the manufacturing method of the heat dissipating element of the present invention. As shown in the figure, the part of the description of this embodiment is the same as the first embodiment described above, so it will not be repeated here. However, the difference between this embodiment and the foregoing first embodiment is that a capillary structure is formed on either side of the first and second metal plates. After this step, there is a step S5: the first and second metal plates A capillary structure part is placed between them. The capillary structure part 3 in this step is a single structure body. The capillary structure part 3 is disposed between the first and second metal plates 1a, 1b. The capillary structure part is Sintered powder plate body or fiber body or grid body or wave plate or plate body with plural grooves. Please refer to FIG. 9, which is a flow chart of the steps of the third embodiment of the manufacturing method of the heat dissipating element of the present invention. As shown in the figure, the part of this embodiment is the same as the first embodiment described above, so it will not be repeated here. However, the difference between this embodiment and the aforementioned first embodiment is that a capillary structure is formed on either side of the aforementioned first and second metal plates; after this step, there is a step S6: the aforementioned first and second metal plates A support structure is formed on either side of the body; the support structure 1c may be a support member that is deformed by external force or processed by a pin cutting process or through an external component, and the pin cutting process is selected from the first 1. One side of any one of the two metal plates 1a, 1b forms a protruding structure through the pin-cutting method to support the other plate; the supporting structure of the external force deformation is selected from the first and second metals A supporting structure formed by applying an external force to one side of one of the plate bodies 1a, 1b and recessing the other side; the additional element is provided between the first and second metal plate bodies 1a, 1b For example, a supporting column is used as a supporting structure. In this embodiment, a supporting structure formed by external force press processing is selected as an illustrative embodiment and is not limited thereto. The present invention mainly improves the defect that commercial pure titanium or titanium metal or copper materials are not easy to combine by means of resistance wheel welding, and improves resistance wheel welding equipment and the first and second metal plates 1a to be subjected to resistance wheel welding during resistance wheel welding , 1b are arranged vertically, so that the discharge melting produced by resistance wheel welding penetrates the first metal plate body 1a and the second metal plate body 1b by one-third to two-thirds of the thickness at the same time. Complete bonding, improve the adhesion and tightness of the first and second metal plates 1a, 1b, and improve the lack of easy alignment of the conventional temperature plate or flat plate heat pipe.

1‧‧‧Body 1a‧‧‧The first metal plate 1b‧‧‧Second metal plate 1c‧‧‧support structure 1d‧‧‧Capillary structure 1e‧‧‧Closed chamber 1f‧‧‧Water injection area 1g‧‧‧working liquid 1h‧‧‧lip 1i‧‧‧sintered welding department 2‧‧‧Resistance wheel welding machine 3‧‧‧Capillary structure

Figure 1 is a schematic diagram of a conventional temperature equalization plate; Figure 1a is a schematic diagram of a conventional temperature equalization plate; Figure 2 is a three-dimensional exploded view of the first embodiment of the heat dissipation element of the present invention; Figure 3 is the present invention Sectional view of the first embodiment of the heat dissipation element; FIG. 4 is a perspective exploded view of the second embodiment of the heat dissipation element of the present invention; FIG. 5 is a flowchart of steps of the first embodiment of the method of manufacturing the heat dissipation element of the present invention; 6 is a schematic view of the first embodiment of the manufacturing method of the heat dissipating element of the present invention; FIG. 7 is a schematic view of the first embodiment of the manufacturing method of the heat dissipating element of the present invention; Step flow chart of the second embodiment; FIG. 9 is a step flow chart of the third embodiment of the manufacturing method of the heat dissipating element of the present invention.

1‧‧‧Body

1a‧‧‧The first metal plate

1b‧‧‧Second metal plate

1c‧‧‧support structure

1d‧‧‧Capillary structure

1e‧‧‧Closed chamber

1h‧‧‧lip

Claims (14)

A heat dissipation element includes: a body having a first metal plate body and a second metal plate body, the first and second metal plate bodies collectively define a closed chamber, and the surface of the closed chamber has at least one The capillary structure layer is filled with a working liquid. The outer periphery of the body cavity has a lip portion, and the lip portion has a sintered welded portion, and the sintered welded portion vertically connects the first and second metal plate bodies. According to the heat dissipating element described in item 1 of the patent application scope, the sintered welded portion vertically penetrates the entire thickness of the first metal plate body and extends to one third to three points of the thickness of the second metal plate The second place. As for the heat dissipating element described in item 1 of the patent application scope, the material of the first and second metal plates is any one of gold, silver, iron, copper, aluminum, commercial pure titanium, titanium alloy, and stainless steel. According to the heat dissipation element described in item 1 of the patent application scope, the body has a support structure, and the support structure may be a support member which is deformed by external force or processed by a cutting pin or by an external element, the cutting pin The processing method is to select a side of any one of the first and second metal plate bodies to form a protruding structure to support the other plate body by cutting pins; the supporting structure of the external force deformation is selected for the A supporting structure formed by applying an external force to one side of one of the first and second metal plate bodies and recessing the other side; the additional element is disposed between the first and second metal plate bodies Such as the support column as a support structure. According to the heat dissipating element described in item 1 of the patent application scope, there is a capillary structure between the first and second metal plates, and the capillary structure is a sintered powder plate or fiber or mesh or wave Either a plate or a plate body with plural grooves. A method for manufacturing a heat dissipating element includes the following steps: providing a first metal plate body and a second metal plate body; forming a capillary structure on either side of the first and second metal plate bodies; One and two metal plates are stacked correspondingly, and through resistance wheel welding, the edges corresponding to the first and second metal plates corresponding to the stacked areas are vertically sealed and a water injection and extraction area is reserved; In the water injection operation, the water injection and suction area is finally closed by resistance wheel welding. The method for manufacturing a heat dissipating element as described in item 6 of the patent application scope, wherein the material of the first and the metal plates is any one of copper, aluminum, commercial pure titanium, and stainless steel. The method for manufacturing a heat dissipating element as described in item 6 of the patent application scope, wherein argon gas is introduced as an inert gas to prevent the oxidation reaction during resistance wheel welding. The method for manufacturing a heat dissipating element as described in item 6 of the patent application scope, in which resistance wheel welding is performed under a vacuum environment. The method for manufacturing a heat dissipating element as described in item 6 of the patent application range, wherein the first and second metal plates are the same size or different. The method of manufacturing a heat dissipating element as described in item 6 of the patent application range, wherein the resistance wheel welding completely penetrates the first metal plate body and penetrates the second metal plate body by one third to two thirds of the thickness. The method for manufacturing a heat dissipating element as described in item 6 of the patent application scope, wherein a capillary structure is formed on either side of the first and second metal plates. After this step, there is a step for the first and second metals A capillary structure is placed between the plates, and the capillary structure is either a mesh or a fiber. The method for manufacturing a heat dissipating element as described in item 6 of the patent application scope, wherein the steps provide a first metal plate body and a second metal plate body; there is also a step in any one of the first and second metal plate bodies A supporting structure is formed on the side. The method of manufacturing a heat dissipating element as described in item 13 of the patent application range, wherein the support structure may be a support member that is deformed by external force or processed by a pin or processed by an external element, and the pin cutting process is selected from One side of any one of the first and second metal plates forms a protruding structure through a pin-cutting method to support the other plate; the supporting structure of the external deformation is selected from the first and second metals A support structure formed by applying an external force on one side of one of the plate bodies to the other side; the additional element is provided between the first and second metal plates by providing a support body such as a support column as a support structure.

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