TWI661172B - Heat dissipation component and manufacturing method thereof - Google Patents

Abstract

A heat dissipation element and a manufacturing method thereof, the heat dissipation element has a body, and the body has A first metal plate body and a second metal plate body together define a cavity. The cavity has a capillary structure layer and is filled with a working liquid. The outer edge of the body cavity has a lip, and the lip has a The sintered welded part is vertically connected to the first and second metal plate bodies, and the manufacturing method of this case directly and vertically welds and combines the first and second metal plate bodies through resistance wheel welding, thereby improving the first and second metal plate bodies after welding. Combination and tightness.

Description

Radiating element and manufacturing method thereof

A heat radiation element and a manufacturing method thereof, in particular, a heat radiation element and a manufacturing method thereof that improve the welding degree and tightness of welding of the heat radiation element.

The temperature equalizing plate or flat plate heat pipe is generally used as a heat conduction element. These two heat conduction elements have high thermal conductivity. The internal vacuum sealed chamber is filled with working liquid, which allows the conversion of the two-phase characteristics of gas and liquid to quickly achieve the effect of heat conduction. The temperature equalizing plate and flat-type heat pipe are stacked through at least two metal plate bodies, and then the edge sealing, water injection, vacuum sealing and other operations are performed. The most commonly used materials for the temperature equalizing plate and flat-type heat pipe are copper, aluminum, Metal materials such as stainless steel, of which copper is the most commonly used, because copper itself has the highest thermal conductivity, so it is most commonly used.

Most temperature equalizing plates and flat heat pipes are mainly used for edge bonding by diffusion bonding and brazing and spot welding. Diffusion bonding and brazing are suitable for most materials. However, if the combination of two dissimilar materials such as copper and aluminum or copper and stainless steel is not suitable for the diffusion bonding method.

The disadvantage of spot welding is that although continuous processing can be performed, but the edge sealing cannot be completely closed, if the work used on the edge of the temperature equalizing plate cannot maintain the vacuum of the internal chamber and the working fluid is easy to leak due to poor sealing, As a result, the heat conduction effect is lost.

There are also companies who perform welding and joining by using resistance wheel welding. The current temperature-welding plate or flat-plate heat pipe of resistance wheel welding mainly consists of an upper plate 3a (smaller surface area) and a lower plate 3b (surface (Larger product) after being superimposed on each other, and then through the right and corner positions where the upper and lower plates 3a and 3b are overlapped to perform resistance wheel welding (as shown in Figures 1 and 1a), although resistance wheel welding can Provides welding of upper and lower plates 3a and 3b with inconsistent sizes. However, the conventional welding method and material of resistance wheel welding still have disadvantages. For example, the upper and lower plates 3a and 3b are used to form vertical corners that can provide welding. The upper plate 3a is selected to be smaller than the lower plate 3b, so the upper and lower plates 3a, 3b must be accurately aligned, and even a special jig must be used to position the upper and lower plates 3a, 3b.

Furthermore, when the welding path of resistance wheel welding encounters rounded corners, the path must be slowly modified from a straight line to an arc shape, and multiple short straight lines will be used to piece together the arc path. Repeated parts or increased dwell time will cause the material to over-melt or even destroy the capillary structure inside the soaking plate or flat heat pipe or shrink the internal cavity. In addition, in order to form a weldable vertical corner, you must choose a shape and size Different upper and lower plates 3a and 3b make the outer edge lip of the lower plate 3b easy to produce unnecessary and invalid lips, forming the disadvantage of material waste.

Knowing has the following disadvantages: 1. waste of materials; 2. poor sealing; 3. additional positioning must be performed; 4. different materials are not easy to combine.

Therefore, in order to solve the shortcomings of the above-mentioned conventional technologies, the main object of the present invention is to provide a heat-dissipating element with better combination and tightness.

Another object of the present invention is to provide a method for manufacturing a heat dissipation element capable of improving the bonding and sealing performance of a temperature equalizing plate.

In order to achieve the above object, 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, the first and second metal plate bodies together define a cavity, and the surface of the cavity has at least one capillary structure layer and is filled with a working liquid, The outer edge 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 and second metal plate bodies.

In order to achieve the above object, the present invention provides a method for manufacturing a heat dissipation element, which includes the following steps: providing a first metal plate body and a second metal plate body; A capillary structure is formed on the side; the first and second metal plates are overlapped correspondingly, and the edge sealing operation corresponding to the corresponding overlap of the first and second metal plates is performed by resistance wheel welding and reserved. A water injection and air extraction area; vacuum and water injection operations are performed, and finally the water injection and air extraction area is closed by means of resistance wheel welding.

The present invention mainly improves the lack of the uniformity and tightness of the isothermal plate by improving the angle structure and method of welding between the resistance wheel welding and the first and second metal plates.

1‧‧‧ Ontology

1a‧‧‧First metal plate body

1b‧‧‧Second metal plate body

1c‧‧‧Support structure

1d‧‧‧capillary structure

1e‧‧‧closed chamber

1f‧‧‧Injection area

1g‧‧‧working fluid

1h‧‧‧lip

1i‧‧‧Sintered Welding Section

2‧‧‧ resistance wheel welding machine

3‧‧‧ Capillary Structure

Figure 1 is a schematic diagram of a conventional temperature equalizing plate; Figure 1a is a schematic diagram of a conventional temperature equalizing plate; Figure 2 is a three-dimensional exploded view of a first embodiment of a heat dissipation component of the present invention; and Figure 3 is a present invention A cross-sectional view of the first embodiment of the heat-dissipating element; FIG. 4 is an exploded perspective view of the second embodiment of the heat-dissipating element of the present invention; FIG. 5 is a flowchart of the steps of the first embodiment of the method of manufacturing the heat-dissipating element of the present invention; FIG. 6 is a processing schematic diagram of the first embodiment of the manufacturing method of the heat dissipation element of the present invention; FIG. 7 is a processing schematic diagram of the first embodiment of the manufacturing method of the heat dissipation element of the present invention; FIG. 8 is a flowchart of the steps of the second embodiment of the method for manufacturing a heat dissipation element according to the present invention; FIG. 9 is a flowchart of the steps of the third embodiment of the method for manufacturing a heat dissipation element according to the present invention.

Please refer to Figs. 2 and 3, which are three-dimensional exploded and assembled diagrams 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 materials of the first and second metal plate bodies 1a, 1b are gold, silver, iron, copper, aluminum, commercial pure titanium, Any of stainless steel or other metal with thermal conductivity, 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 can be sintered Powder body or fiber body or grid body or groove), the capillary structure 1d is selected to be installed in any of the first and second metal plate bodies 1a, 1b, and the closed chamber 1e is filled with a work Liquid 1g, the outer edge of the sealed chamber 1e of the body 1 has a lip portion 1h, the lip portion 1h has a sintered welding portion 1i, and the sintered welding portion 1i is vertically connected to the first and second metal plate bodies 1a, 1b, The sintered welding portion 1i vertically penetrates the entire thickness of the first metal plate body 1a and extends to one third to two thirds of the plate thickness of the second metal plate body 1b.

The body 1 has a supporting structure 1c. The supporting structure 1c can be a supporting member that can be deformed by external force, or can be processed by cutting pins, or through external components. The cutting pin processing is selected from the first and second One side of any one of the metal plate bodies 1a, 1b is formed by a cutout processing method (such as milling) to form a protruding structure to support the other plate body; the supporting structure 1c deformed by the external force is selected from this Any one of the first and second metal plate bodies 1a, 1b is a support structure 1c formed by applying an external force to one side of the first and second metal plate bodies to be recessed to the other side; the external element is transmitted through the first and second metal plate bodies 1a, 1b. It is not limited to provide a support body such as a support column as the support structure 1c between the two.

Please refer to FIG. 4, which is an exploded perspective view of the second embodiment of the heat dissipation element of the present invention. As shown in the figure, the description and implementation of this embodiment are the same as those of the first embodiment, so it will not be repeated here. Implement The difference between this example and the first embodiment is that a capillary structure 3 is placed between the first and second metal plate bodies. The capillary structure in this step is a single structure, and the capillary structure 3 is provided in the first Between one or two metal plate bodies 1a, 1b, the capillary structure 3 is any one of sintered powder plate body, fiber body, grid body, wave plate or plate body with a plurality of grooves, and passes through the capillary The structural member 3 can provide auxiliary capillary force and increase the efficiency of vapor-liquid circulation.

Please refer to FIG. 5, which is a flowchart of the steps of the first embodiment of the manufacturing method of the heat dissipation element of the present invention, and refer to the processing schematic diagrams of FIGS. 6 and 7. As shown in the figure, the manufacturing method of the heat dissipation element of the present invention includes the following step:

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 being the same or different in size Any one of the first and second metal plate bodies 1a and 1b may 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 used as an example. Examples are not limited.

S2: A capillary structure is formed on either side of the first and second metal plate bodies; a capillary structure is formed on any one or any two sides of the first and second metal plate bodies 1a, 1b corresponding to each other 1d, the capillary structure 1d is any of a sintered powder, a mesh body, a groove or a fibrous body.

S3: Laminate the first and second metal plates correspondingly, and use resistance wheel welding to vertically perform edge sealing operations corresponding to the corresponding overlapping portions of the first and second metal plates and reserve a water injection pump. Area; the aforementioned first and second metal plate bodies 1a, 1b are stacked correspondingly to form a closed chamber 1e, and the outer edges of the first and second metal plate bodies 1a, 1b are overlapped correspondingly Combined by means of resistance wheel welding. When resistance wheel welding is performed, the resistance wheel welding tool is mainly disposed perpendicular to the first and second metal plate bodies 1a and 1b, so that the The discharge fusion generated by the resistance wheel welding machine 2 penetrates vertically into the first and second metal plate bodies 1a, 1b, directly penetrates the entire first metal plate body 1a provided on the upper part, and then penetrates the first metal plate body 1a. The second metal plate 1b in the lower part of a metal plate body 1a has a thickness of about one third to two thirds. Finally, the area 1f to be filled with water and air is reserved to close other parts. When performing the resistance wheel welding work, Preferably, the resistance wheel welding tool 2 and the first and second metal plate bodies 1a and 1b are protected by inert gas with argon gas to avoid oxidation reaction during resistance wheel welding work, and the resistance can also be changed. The working environment of wheel welding is set in a vacuum environment to avoid contamination or oxidation reactions during welding.

S4: Vacuuming and water injection are performed. Finally, the water injection and air extraction area is closed by resistance wheel welding.

Carry out air-pumping and water-injection operations, and vacuum-inject working fluid into the first and second metal plates 1a and 1b after edge-sealing. Finally, the reserved water-injection and air-exhausting area 1f is conducted by resistance wheel welding Closed.

Please refer to FIG. 8, which is a flowchart of the steps of the second embodiment of the method for manufacturing a heat dissipation component according to the present invention. As shown in the figure, the implementation of this embodiment is the same as that of the first embodiment, so it will not be repeated here. However, the difference between this embodiment and the first embodiment is that a capillary structure is formed on either side of the first and second metal plate bodies. After this step, there is a step S5: on the first and second metal plate bodies. A capillary structure is placed between them. The capillary structure 3 of this step is a single structure. The capillary structure 3 is disposed between the first and second metal plate bodies 1a and 1b. The capillary structure is Either a sintered powder plate body or a fiber body or a grid body or a wave plate or a plate body having a plurality of grooves.

Please refer to FIG. 9, which is a flowchart of the steps of the third embodiment of the method for manufacturing a heat dissipation component of the present invention. As shown in the figure, the implementation of this embodiment is the same as that of the first embodiment, so it will not be repeated here. To repeat, the difference between this embodiment and the first embodiment is that a capillary structure is formed on either side of the first and second metal plate bodies; after this step, there is a step S6: A support structure is formed on any one side of the metal plate body; the support structure 1c is a support member that can be deformed by external force, or processed by cutting pins, or through external components, and the cutting pins are selected from One side of any one of the first and second metal plate bodies 1a, 1b is formed by a protruding pin to form a protruding structure to support the other plate body; the supporting structure deformed by the external force is selected from the first, Any one of the two metal plate bodies 1a, 1b is a supporting structure formed by applying an external force to one side of the plate body and recessing the other side; the external component is penetrated between the first and two metal plate bodies 1a, 1b A support body such as a support column is set as the support structure. In this embodiment, the support structure formed by external force press processing is selected as an illustrative embodiment and is not limited thereto.

The invention mainly improves the defect that the commercial pure titanium or titanium metal or copper material is not easy to combine by means of resistance wheel welding, and improves the resistance wheel welding device and the first and second metal plate bodies 1a that are to be subjected to resistance wheel welding during resistance wheel welding. And 1b are arranged vertically correspondingly, so that the discharge fusion generated by resistance wheel welding penetrates the first metal plate body 1a and the second metal plate body 1b one-third to two-thirds of the thickness at the same time. Complete joining, improving the binding and sealing properties of the first and second metal plate bodies 1a, 1b, and improving the lack of alignment of conventional temperature equalizing plates or flat heat pipes.

Claims (12)

A heat dissipating 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 edge of the body cavity has a lip portion, the lip portion has a sintered welding portion, the sintered welding portion is vertically connected to the first and second metal plate bodies, and the sintered welding portion Perpendicularly penetrates the entire thickness of the first metal plate body and extends to one third to two thirds of the plate thickness of the second metal plate body. According to the heat dissipating component described in item 1 of the scope of patent application, 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 the first item of the patent application scope, the body has a supporting structure, and the supporting structure may be a supporting member that is deformed by external force or processed by cutting pins or through an external element as a support. The processing system is selected from one of the first and second metal plates to form a protruding structure by cutting pins to support the other plate; the supporting structure deformed by external force is selected from the Any one of the first and second metal plates is a support structure formed by applying an external force to one side of the first and second metal plates and denting the other side; the external element is a support provided through the first and second metal plates. Such as support columns as support structures. According to the heat dissipating element described in item 1 of the scope of patent application, there is a capillary structure between the first and second metal plates, and the capillary structure is a sintered powder plate or fiber or grid or wave Either a plate or a plate with a plurality of grooves. A method for manufacturing a heat dissipation 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; The first and second metal plates are overlapped correspondingly, and through resistance wheel welding, the edge corresponding to the first and second metal plates corresponding to the overlapped portion is edge-sealed and a water injection and air extraction area is reserved. The resistance wheel Welding system completely penetrates the first metal plate body and penetrates one-third to two-thirds of the thickness of the second metal plate body; vacuuming and water injection operations are performed, and finally the water injection and air extraction area is performed by resistance wheel welding Closed. The method for manufacturing a heat dissipation element according to item 5 of the scope of the patent application, wherein the material of the first and metal plate bodies is any one of copper, aluminum, commercial pure titanium, and stainless steel. According to the method for manufacturing a heat dissipation element according to item 5 of the scope of the patent application, wherein argon is passed as an inert gas to prevent the oxidation reaction from occurring during resistance wheel welding. The method for manufacturing a heat dissipation element according to item 5 of the scope of patent application, wherein the resistance wheel welding is performed in a vacuum environment. The method for manufacturing a heat dissipation element according to item 5 of the scope of patent application, wherein the first and second metal plate bodies are the same or different in size. The method for manufacturing a heat dissipation component according to item 5 of the scope of patent application, wherein a capillary structure is formed on either side of the first and second metal plates, and a step is provided on the first and second metals after this step. A capillary structure is placed between the plates, and the capillary structure is any of a grid body or a fiber body. The method for manufacturing a heat dissipation element according to item 5 of the scope of the patent application, wherein the steps provide a first metal plate body and a second metal plate body; and a step is performed on any one of the first and second metal plate bodies. A support structure is formed on the side. According to the method for manufacturing a heat dissipation component according to item 11 of the scope of the patent application, wherein the support structure is a support member that is deformed by external force or processed by cutting pins or through an external element as a support, the cutting process is selected from One side of any one of the first and second metal plates is formed with a protruding structure through a pin to support the other plate; the supporting structure deformed by the external force is selected from the first and second metals. A supporting structure formed by applying an external force to one side of any one of the plate bodies and indenting the other side; the external element is provided through a support body such as a support post between the first and second metal plate bodies structure.