JPH09271863A - Method for combining extruded materials and liquid-cooling heat sink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To combine small projections formed on extruded members by plastic deformation by pressing the recessing and the projecting line parts formed on the one side of the extruded material into corresponding to the projecting and the recessing parts on the other side thereof. SOLUTION: In a groove parts in both plates 2 and 2a for fitting to a cooling fluid carrying pipes 3, small projecting parts 3a are arranged. Further, in the base plates 2 and 2a, the projecting line parts 4 corresponding to the recessing line parts 4a for fitting are arranged on one side. In fitting the projecting line parts 4 and the corresponding recessing line parts 4a with the pressure, the projections corresponding to the small projections 3a on the base plates 2 and 2a are engraved on the surface of the cooling fluid carrying pipes 3 inserted between the base plates. By this method, the combining force and the contacting area between the base plates 2 and 2a and the pipes 3, are increased and a liquid-cooling heat sink having good cooling efficiency can be manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid cooling heat sink assembly method and a liquid cooling heat sink.

[0002]

2. Description of the Related Art When a heating element such as a diode or thyristor is cooled by a liquid cooling heat sink, a cooling fluid transportation pipe is made of a metal such as copper which is not easily corroded, and a heating element mounting surface is made of a metal such as aluminum. Since they are manufactured, the two metals are brazed or caulked.

Therefore, there is a problem in low productivity and increase in production cost in brazing, and in fitting two metals in caulking.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks of the prior art and utilizes the pressure at the time of joining two extruded materials to form a cooling fluid small protrusion at the time of joining two extruded materials. It is to provide a liquid-cooled heat sink that is low in price and has a good heat dissipation effect.

[0005]

[Problems to be Solved by the Invention] A plurality of concavo-convex portions having a portion having an angle on either or both sides of two independent extruded members to be joined and a plurality of small protrusions on the inner surface. An outer surface of the object sandwiched between the grooves of the extruded material when the two extruded materials are fastened by press-fitting the concave-convex linear portion formed on one extruded material into the corresponding convex-concave linear portion. In the method of joining extruded materials, the small protrusions formed on the extruded material are formed by plastic deformation.

[0006] Two independent extruded members to be joined are provided with a plurality of ridges or ridges each having an angled portion on one or both of the joining surfaces and a groove having a plurality of small protrusions on the inner surface. When the two extruded materials are fastened by press-fitting the uneven strip portion formed on one extruded material into the corresponding uneven strip portion, the extruded material is formed on the outer surface of the object sandwiched between the grooves of the extruded material. In the joining method of extruding materials, characterized in that the formed small protrusions are formed by plastic deformation, two independent extruding materials are the heating element mounting surfaces, and the object sandwiched between these is a cooling fluid transport pipe. It is a method of assembling a characteristic liquid-cooled heat sink.

Small protrusions corresponding to the small protrusions formed in the groove of the extruded material are formed on the outer surface of the cooling fluid transfer tube formed in the two independent extruded materials joined by pressure. This is a liquid-cooled heat sink.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is mainly implemented in a heat sink or the like for cooling a heating element such as a transistor or a thyristor in the industrial electric field.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of a liquid-cooled heat sink used for implementing the present invention, FIG. 2 is an assembly diagram of the liquid-cooled heat sink, FIG. 3 is a partially enlarged view before joining, and FIG.
[Fig. 4] is a partially enlarged view after joining. In FIG. 1, 2 and 2
Reference numeral a is a base plate to which a heating element made of extruded material or the like is attached, and reference numeral 3 is a hollow pipe made of copper or the like for transporting a liquid cooling fluid.

FIG. 2 shows the liquid-cooled heat sink of the present invention before assembling, and the grooves 2 and 2a are fitted with the cooling fluid transport pipes of the bases 2 and 2a to which the heating element made of extruded material or the like is attached. A small protrusion 3a is provided on the portion, and a convex ridge portion 4 corresponding to the fitting concave ridge protrusion 4a is provided on one of 2 and 2a, and a concave ridge corresponding to the convex ridge portion 4 by pressure is provided. When the portion 4a is fitted, 2 and 2 are formed on the surface of the cooling fluid transportation pipe 3 inserted between them.
A protrusion corresponding to the small protrusion 3a on a is carved.

FIG. 3 is a partially enlarged view of the two extruding members 2 and 2a before joining, in which the width d of the ridge 4 provided on 2 is the same as the width d1 of the groove 4a provided on the corresponding 2a. The concave streak portion 4a, which is slightly or slightly larger, has a changing angle θ, and when the corresponding convex streak portion 4 is press-fitted,
4 can be forcibly bent to cause a working effect, and the fastening by press fitting can be made a stronger fastening force.

FIG. 4 is a partially enlarged view of the cooling fluid transport pipe 3 after the two base plates 2 and 2a and the cooling fluid transport pipe 3 are fitted together. On the surface of the cooling fluid mail pipe, small protrusions attached to 2 and 2a are pressed. Since 2 and 2a are fitted together at the same time as engraved by, the coupling force and contact area of the base plates 2 and 2a and the pipe 3 are increased, and a liquid-cooled heat sink with good cooling efficiency can be manufactured.

[00013]

According to the present invention, since the cooling fluid transport pipe and the base plate for mounting the heating element sandwiching the cooling fluid transport pipe can be closely fitted to each other when the two base plates are fitted, the base plate and the cooling fluid transport pipe can be fitted. Not only can the contact area be increased, but the number of assembly steps can be reduced, so that low-priced products can be provided.

[00014]

[Brief description of drawings]

FIG. 1 is a perspective view of a liquid cooling heat sink to which the present invention is applied,

FIG. 2 is a view of the two base plates 2 and 2a and the cooling fluid transport pipe 3 before being combined.

FIG. 3 is an enlarged view of a portion before fitting the base plate,

FIG. 4 is a partially enlarged view after fitting the base plate.

[00015]

[Explanation of symbols]

 1, liquid-cooled heat sink 2, 2a base plate 3 liquid-cooled fluid transport pipe 3a small protrusion 4 convex ridge 4a concave ridge

Claims (3)

[Claims] 1. A groove provided with a plurality of ridges and ridges each having an angled portion on one or both sides of two independent extruded members to be joined, and a plurality of small protrusions on the inner surface. Is provided, and when the two extruded materials are fastened by press-fitting the uneven strip portion formed on one extruded material to the corresponding uneven strip portion, the extruded material is placed on the outer surface of the object sandwiched between the grooves of the extruded material. A method for joining together extruded materials, characterized in that the small protrusions formed on the base are formed by plastic deformation. 2. A method for assembling a liquid-cooled heat sink, characterized in that the two independent extruded members joined in claim 1 are heating element mounting surfaces, and the object sandwiched therebetween is a cooling fluid transport pipe. . 3. Small projections corresponding to the small projections formed in the groove of the extruded material are formed on the outer surface of the cooling fluid transfer tube formed in two independent extruded materials joined by pressure. A liquid-cooled heat sink.