JP3198284B2 - Extruded material joining method and liquid-cooled heat sink - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for assembling a liquid-cooled heat sink and a liquid-cooled heat sink.

[0002]

2. Description of the Related Art When a heating element such as a diode or a thyristor is cooled by a liquid-cooled heat sink, a cooling flow is required.
The body transport pipe is made of a metal such as copper which is hardly corroded, and the heating element mounting surface is made of a metal such as aluminum. Therefore, the two metals are joined by brazing or caulking.

[0003] For this reason, there is a problem in brazing, which results in low production and an increase in production price, and in caulking, there is a problem in bonding the two metals.

[0004]

SUMMARY OF THE INVENTION The present invention overcomes the above-mentioned disadvantages of the prior art and provides a cooling flow sandwiched between two extruded members.
The shape of the body transport tube is reduced when the two extruded materials are joined together.
The extruded material constituting the groove provided with the protrusion is sandwiched between the grooves.
Using the pressure at the time of joining the extruded materials
Small protrusions provided on the extruded material on the outer surface of the cooling fluid transport pipe
It is an object of the present invention to provide a liquid-cooled heat sink that is inexpensive and has a good heat radiation effect by embossing .

[Means for Solving the Problems]

[0005] The present invention provides for two independent pushes to be joined.
A groove having a plurality of small projections is provided on the material,
Correspondence between the two extruded materials when extruded materials are joined
The small surface on the outer surface of the object sandwiched between the two grooves
The protrusion shape is determined by the pressure when the two extruded materials are joined together.
Extruded material characterized by being formed by plastic deformation
It is a method of combining aspirations.

[0006] The present invention provides for two independent pushes to be joined.
A groove having a plurality of small projections is provided on the material,
Correspondence between the two extruded materials when extruded materials are joined
The small surface on the outer surface of the object sandwiched between the two grooves
The protrusion shape is determined by the pressure when the two extruded materials are joined together.
Extruded material characterized by being formed by plastic deformation
The two Germans combined in the combining method
The raised extruded material is used as the heating element mounting surface,
A liquid characterized in that the object to be filled is a cooling fluid transport pipe
It is a cold heat sink.

[0007] The present invention is a two-part pressure joint.
Outside the cooling fluid transport pipe formed in the vertical extruded material
Small protrusions formed in the grooves of the extruded material on the side surface
With a liquid-cooled heat sink characterized by being engraved
is there.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is embodied mainly in a heat sink for cooling a heating element such as a transistor or a thyristor in the field of industrial electricity.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a liquid-cooled heat sink used in the embodiment of the present invention, FIG. 2 is an assembled view of the liquid-cooled heat sink, and FIG. 3 is a partially enlarged view of the two extruded members before joining . 4 is a cooling fluid transport pipe and two pushes
It is the elements on larger scale after the joining of the material . In FIG. 1, 2
And 2a are base plates to which a heating element made of extruded material or the like is attached, and 3 is a cold plate made of copper or the like.
A hollow tube for transporting retirement fluid.

FIG. 2 shows the cooling fluid transport pipes of the bases 2 and 2a on which a heating element made of extruded material or the like is to be mounted, before the liquid-cooled heat sink of the present invention is assembled.
The groove portion of the bond to 2 and 2a are ridges 4 are provided corresponding to the coupling concave portion 4a on one the small projections 3a are provided, also 2 and 2a, the ridge by a pressure When the part 4 and the corresponding concave ridge part 4a are joined, the cooling fluid transport pipe 3 sandwiched between the parts 4 is formed by two extruded materials 2 and 2a.
The projections corresponding to the small projections 3a on 2 and 2a are engraved on the outer surface thereof, being deformed into the shape of the groove to be formed .

FIG. 3 is an enlarged view of a portion before joining of the two extruded members 2 and 2a.
Is made the same as or slightly larger than the width d1 of the concave portion 4a provided in the corresponding 2a. The concave ridge portion 4a has a changing angle θ, and the corresponding convex ridge portion 4 is press-fitted. time, the convex portion 4 forcibly bent to cause a processing effect can be even stronger bonding force binding by press-fitting.

FIG. 4 is a partially enlarged view after the two base plates 2 and 2a and the cooling fluid transport pipe 3 are connected . Small projections attached to 2 and 2a are formed on the surface of the cooling fluid transport pipe by pressure. And 2a are joined at the same time as they are notched, so that the joining force and contact area of the base plates 2 and 2a and the cooling fluid transport pipe 3 are increased, and a heat sink with good thermal efficiency can be manufactured.

[0013]

According to the present invention, the close connection between the cooling fluid transport pipe and the base plate on which the heating element is mounted, which sandwiches the cooling fluid transport pipe, can be performed when the two base plates are connected. In addition to increasing the contact area, the number of assembly steps can be reduced, so that a low-priced product can be provided.

[0014]

[Brief description of the drawings]

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

FIG. 2 shows two base plates 2 and 2a and a cooling fluid transport pipe 3
Figure before joining

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

FIG. 4 is an enlarged view of a part after the base plate is joined .

[0015]

[Explanation of symbols]

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

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B21D 39/03 B21D 53/02 B23P 19/02 H01L 23/40 H01L 23/46

Claims (3)

(57) [Claims] 1. The method according to claim 1, wherein the two independent extruded members are joined together.
Providing a groove having a plurality of small protrusions therein, wherein the extruded material
When the two extruded materials correspond to each other,
The small projections on the outer surface of the object sandwiched between the two grooves
Plastic deformation due to the pressure at the time of joining the two extruded materials
Of extruded materials characterized by forming by extrusion
Law. 2. The two independent extruded materials being joined,
Providing a groove having a plurality of small protrusions therein, wherein the extruded material
When the two extruded materials correspond to each other,
The small projections on the outer surface of the object sandwiched between the two grooves
Plastic deformation due to the pressure at the time of joining the two extruded materials
Of extruded materials characterized by forming by extrusion
Two independent pushes combined in a method combining method
The extruded material is used as the heating element mounting surface, and the object is sandwiched between
A liquid-cooled heat sink, characterized in that
Link. 3. Two independent pushes joined by pressure
The outer surface of the cooling fluid transport tube formed in the outgoing material
Small protrusions formed in the grooves of the extruded material are engraved
A liquid-cooled heat sink, comprising: