CN1128038C - Thermal radiator and its manufacture technology - Google Patents

Abstract

The present invention provides a heat radiator and a manufacture method thereof. Jacks are directly punched on a plurality of thin plate surfaces, and the jacks are overlapped into a base which is leaned on a computer central processor; blades which convexly extend at the same side of the base are orderly inserted in the jacks; then, all the thin plate surfaces are quickly inserted into one body by the method that deformation slotted holes are punched on gaps of the blades to shorten the machining time; the thin plate surfaces are properly ground and cut into finished products. The heat radiator which is provided with a plurality of blades can be manufactured.

Description

Heat sink and manufacturing method thereof

The present invention relates to a heat dissipation device and its manufacturing method, in particular to a heat dissipation device which punches holes on the surface of a thin plate for inserting blades, and uses the punched out deformation slots to embed each thin plate surface to form a base and the heat dissipation device. Manufacturing method.

At present, with the rapid development of the computer information industry and the widening range of computer applications in various industries, the user's requirements for the computer central processing unit (CPU) to process data are also getting faster and faster, and the current central processing unit The circuit design tends to be simplified and centralized, so the central processing unit no longer only includes a simple chip, and many miniaturized electronic components are gradually incorporated into the central processing unit, so electronic components like this are getting faster and faster The calculation speed will be accompanied by a relatively high overall heat generation. Such high temperature heat is very detrimental to the stability and quality of the telecommunications transmission of the central processing unit. Therefore, it is necessary to use a heat dissipation medium with a fast heat dissipation speed to assist in dissipating heat. For the structure of the heat dissipation device in the prior art, reference may be made to US Patent Nos. 4,712,159, 4,879,891 and other patents. The heat dissipation devices of these patents utilize extrusion molding, and a plurality of large-area heat dissipation fins are integrally protruded on the same side surface of the heat dissipation panel, so that the heat is exported by placing the heat dissipation panel next to the central processing unit Then through the contact with the air through the blades, it is dissipated by convection. However, the heat dissipation efficiency of the above-mentioned structure is not high, and cannot effectively meet the actual heat dissipation needs of the current central processing unit, and it is easy to cause many problems during manufacture, and the biggest problem comes from how to effectively expand the heat dissipation surface area of the heat dissipation device. Generally speaking, when the number of blades is set more and denser, and the relative ratio of the extension height to width is larger (that is, the blades are thinner and higher), the overall heat dissipation surface area of the heat sink can be appropriately increased. However, in the existing Under the manufacturing technology of extrusion molding, it is not easy for the blade width to height ratio to be 1:8. Therefore, the width of the blades cannot be too thin, and the number of blades cannot be increased relatively, thus limiting the heat dissipation capability.

In order to solve the above problems, some improvements have been made in U.S. patents such as Nos. 4,884,331, 5,208,731, 5,464,054, and 5,486,980. Grooves are cut on the above-mentioned large-area heat dissipation blades, that is, each blade is cut into a plurality of strip-shaped heat sinks, and then heat dissipation devices are added. heat dissipation surface area. However, such a design can only increase part of the heat dissipation surface area, and cannot effectively increase the number of blades or change their width-to-height ratio, and the blades that are too thin and narrow are prone to bending or breaking when they are grooved, so processing The speed of trenching should not be too fast, which will greatly reduce the productivity.

The main purpose of the present invention is to provide a heat sink that increases the heat dissipation surface area of the heat sink several times and its manufacturing method. It can arrange a larger number of denser blades on the base of the heat sink with the same area, and effectively improve the heat dissipation. The overall cooling efficiency of the device. In addition, by utilizing the relatively easy punching process of thin plates, the heat sink can quickly punch holes for blade assembly, thereby shortening the processing time and effectively increasing production capacity.

The technical feature of the present invention is that it includes the steps of punching, punching and shearing, combining, impacting, milling and cutting. strips, and then form the base of each plate surface and make the rows of blades tightly fit on the corresponding sockets in turn and properly extend on the same side of the base, and then impact the deformation slots on the appropriate positions of the base between the blades, so that The boards are embedded and fixed into one body to strengthen the combination of the blades, and then cut to an appropriate length to obtain the finished product.

Compared with the prior art, the present invention has the following advantages: because the cooling device adds more blades on the side of the base, and the height of the blades is not limited by the extrusion molding production process, the heat dissipation area can be effectively increased, The heat dissipation efficiency is better and the CPU can be maintained to work normally.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a partial perspective view of the finished product of the cooling device of the present invention with vertically arranged blades.

Fig. 2 is a manufacturing flow chart of the heat sink of the present invention.

Fig. 3 is a perspective view of the bottom plate of the heat dissipation device combined with the blades of the present invention.

Fig. 4 is a perspective view of the heat sink of the present invention impacting and assembling the bottom plate.

Fig. 5 is a sectional view along the line V-V of Fig. 4 .

Fig. 6 is a sectional view along line VI-VI of Fig. 1 .

Fig. 7 is a perspective view of the finished product of the cooling device of the present invention with blades arranged laterally.

As shown in Figure 1, the cooling device 1 includes a base 10 which rests on the central processing unit (not shown) to absorb and conduct the heat generated by the central processing unit, and a row of heat sinks extending from the surface of the base to one side. The blade 2, wherein the base 10 is formed by superimposing the first plate surface 11, the second plate surface 12 and the third plate surface 13, it can also be provided with more or less number of plate surfaces according to the needs of actual processing, Several rows of jacks 111, 121, 131 (shown in Figure 3) are correspondingly punched on these boards at a certain distance, and when these boards are stacked to form the base 10, the jacks on each board can just move up and down. align. The blade 2 is in the shape of a long strip, which is formed by punching and cutting two staggered continuous blade strips 20 (shown in FIG. 3 ) directly on the material belt, and then combining with the base 10 and folding off the guide belt 21 respectively. Each blade 2 has a bottom 22 slightly wider than the aperture of the insertion hole and a narrower top 23. Therefore, the blade 2 can be quickly inserted from one side of the base 10 through the oppositely arranged insertion hole by using the narrower top 23 of the blade 2. To the other side, it is plugged and fixed by its wider bottom 22, so that several rows of blades 2 extending to one side can be assembled on the surface of the base 10. Between these blades 2, a gap 14 is formed as a passage for air circulation. Therefore, the heat generated by the central processing unit can be conducted to each blade 2 through the base 10, and the side surface of each blade 2 and the gap 14 Contact with the air, so that the heat is transferred to the air, and then the heat is dissipated by air convection. In addition, on the surface of the base 10 between every four adjacent blades 2, the deformation slots 15 are processed and punched. The gap between the blades 2 is punched, so it can match the characteristics that the bottom 22 of each blade 2 is plugged into the socket, so that the board surfaces are tightly combined into a complete base 10 without separation, and the deformation slot 15 is punched out. Afterwards, the base 10 plate surface of the side will be pulled jointly, so that the edge of the socket hole near the deformation slot 15 is deformed thereupon, which also helps the blade 2 to be fastened on the base 10 and is not easy to come out.

Please refer to shown in Fig. 2, it is the flow process that the present invention manufactures above-mentioned radiator 1, and it comprises following several steps: 1, punching step (Stamping) 30:

Firstly, thin plates (usually aluminum thin plates) made of materials with good thermal conductivity are used as the plate surfaces 11, 12, 13 of the base 10, and rows of jacks are punched directly on these plate surfaces. 111, 121, 131. Second, punching and shearing step (Stamping) 31:

While carrying out the punching operation on each plate surface, two intersecting blade strips 20 (shown in FIG. 3 ) can be produced on the long strip of material by punching and shearing, wherein the interleaved punching and shearing blade strips 20 are In order to save material, pre-integrating the vane 2 onto a guide belt 21 will help the vane 2 to be quickly assembled with the board surface of the base 10 . 3. Assembling step (Assembling) 32:

As shown in Figure 3, the plate surfaces that have been punched are superimposed on each other to form a base 10, and the rows of blades 2 connected to the guide belt 21 are respectively guided and aligned with each socket of the base 10, and then each blade 2 Insert the jacks one by one from the bottom side of the base 10 and protrude from the other side, and then fix the base 10 and each blade by tightly fitting the wider bottom 22 of each blade 2 into the jack on the corresponding board surface. 2, the redundant guide strip 21 connected to the bottom side of the blade 2 can be broken off and removed. 4. Punching step 33:

As shown in Figure 4, the base 10 combined with rows of blades 2 is moved below the mold 4, the mold is composed of a fixed plate 40 and a row of impact arms 41 extending downward from the fixed plate 40, wherein the fixed plate 40 Assembled on the machine platform (not shown in the figure), it can be pushed up and down by the machine platform, and the bottom edge of each row of impact arms 41 is protrudingly provided with several square top blocks 42 spaced apart by a certain distance. Since each row of impact arms 41 is longitudinally arranged parallel to the direction of the blades 2 of the cooling device 1, and its setting position is just on the gap 14 of each row of blades 2, when the machine platform drives the fixed plate 40 to move up and down, the Each impact arm 41 is respectively inserted in the gap of each row of blades 2 to move, and the length that the impact arm 41 extends downward is larger than the height of the blade 2, so the downward movement of the impact arm 41 will make the square top block at the bottom 42 directly impacts on the gaps between four adjacent blades 2 to form deformation slots 15 of appropriate depth and trapezoidal hole shape. The stronger the capability of embedding the plate surface of the base 10 and each blade 2 is, as shown in FIG. 5 . 5. Milling step (Milling) 34:

Please refer to Figure 5 and Figure 6, after the assembly of the base 10 and the blade 2 is completed, the other side of the base 10 that is not protruding from the blade 2 can be further milled to remove the deformation groove caused by punching. The bulge 16 protruding from the hole 15 restores the flatness of the side surface and is beneficial to lean against the central processing unit. 6. Cutting step (Cutting) 35:

Cutting operations are carried out on the above-mentioned finished milling semi-finished product according to the required specifications of the cooling device 1 . Seven, complete the finished product 36.

Therefore, the heat dissipation device 1 made by the above-mentioned steps of the present invention can add a large number of blades 2 on the base 10 to effectively increase the heat dissipation surface area of the entire heat dissipation device 1 while saving time and cost. The overall heat dissipation effect of the heat dissipation device 1 is good, so as to solve the heat dissipation problem of the current central processing unit. Moreover, the structure of dividing the base 10 into several plate surfaces will help the rapid completion of the punching process, and the method of impacting the deformation slot 15 to consolidate the base 10 plate surface and the blade 2 also has the advantages of facilitating processing and saving time utility.

In addition, as shown in Figure 7, the blades 2 of the cooling device 1' can also be arranged on the base 10' in a horizontal direction relative to the base 10', so that more blades 2 can be arranged on the base 10', effectively increasing the The heat dissipation capability of the heat dissipation device 1'.

Claims (11)

1. a heat abstractor is used for resting on thermal source, so as to absorbing and heat that conduction heat sources produces, it is characterized in that:

Base is made up of a plurality of plate faces, dashes according to certain spacing on the plate face and is provided with several sockets hole;

Blade is inserted in the jack of each plate face and protrudes and extends on the side of base by base one side;

The distortion slotted eye, be located between the base blade and adjacent these blades on the appropriate location, can end the plate face of base and adjacent blades embedding fixing.

2. according to the described heat abstractor of claim 1, it is characterized in that: base is to be formed by stacking each other and when superimposed, jack set on it be able to consistency from top to bottom by plural plate face.

3. according to the described heat abstractor of claim 1, it is characterized in that: blade is behind the continuous blade bar cracking-off steering tape that gone out by the direct punching of strip and make, these blades all are long strip-board shape, and having than the jack aperture is wide bottom and comparatively sharp narrow top, when each blade is inserted to opposite side by base one side, utilize the bottom plug of its broad only to be fixed on the jack of each plate face.

4. according to the described heat abstractor of claim 1, it is characterized in that: the distortion slotted eye is gone out by mould institute's punching out on the susceptor surface between per four adjacent blades.

5. the manufacture method of a heat abstractor is characterized in that: the punching step is the jack of punching out number row on the good thin plate of heat conductivity;

Forming step is to make the blade that fuses by means of steering tape on strip;

Integrating step, be several to be dashed have the thin plate of jack to be overlapped into heat dissipation base, guide blade in a row again and aim at successively and insert in the jack of each thin plate, make each blade protrude out out, and the bottom of each blade is tightly fitted in the jack fixed by opposite side;

Impact step, but be distortion with mould bump base knocking-on build-in base and each blade on the position between adjacent blades;

The milling step is not carry out milling operation with protruding out vaned base another side, makes on this flat side down and the smooth plug in central processing unit of energy.

6. according to the manufacture method of the described heat abstractor of claim 5, it is characterized in that: being used for the thin plate of punching is aluminium sheet.

7. according to the manufacture method of the described heat abstractor of claim 5, it is characterized in that: forming step be borrow punching processing make blade on the strip and make by interconnected mode each blade bottom one be connected in the strip dual-side on the related steering tape of making.

8. according to the manufacture method of claim 5 or 7 described heat abstractors, it is characterized in that: its bottom of the made blade of forming step is wide than the jack of each thin plate, with the jack tight fit.

9. according to the manufacture method of claim 5 or 7 described heat abstractors, it is characterized in that: after integrating step is inserted the jack of base with each blade, can will be connected in the removal that fractures of the unnecessary steering tape in blade bottom side.

10. according to the manufacture method of the described heat abstractor of claim 5, it is characterized in that: impact the mould that step adopted and is formed, at each striking arm root edge and convex with several jacking blocks by fixed head and from the striking arm in a row that fixed head extends downwards.

11. the manufacture method according to the described heat abstractor of claim 5 is characterized in that: the semi-finished product of finishing milling can further cut off step again, to cut off out the heat abstractor finished product that meets required specification.

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