JPH0112571B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] When the heat dissipation fin is caulked to a groove provided on a substrate, projecting walls are provided on the left and right sides of the groove for guiding and caulking the heat dissipation fin. The present invention relates to a method of manufacturing a heat radiator in which the heat radiating fins are easily and reliably caulked to the substrate.

[Problems to be solved by conventional technology and invention]

Conventionally, in this type of heatsink, the fins are placed on the board at extremely narrow intervals, for example, with a fin spacing of around 2 mm.
To implant fins with a thin thickness of around 0.3 mm, the fins are inserted into grooves provided on the substrate, and a convex portion of the substrate is crushed using a spacing plate having a chevron-shaped tip and a long groove corresponding to the fin. A method of caulking is known (Special Publication No. 36-9565).

This method requires a process of making grooves on the surface of the substrate using a metal saw, and also requires a specific jig for the process of caulking the fins.

Furthermore, as shown in Japanese Patent Publication No. 50-37148, the method of guiding a strip of fin material into a spiral groove and caulking the raised ridges on both sides of the groove by applying strong pressure requires a grooving process similar to the above. The fin caulking process not only requires a specific jig for pressing the ridges, but also the fin caulking height substantially depends on the depth of the groove, which is not sufficient for the purpose of the present invention.

[Means for solving problems]

The present invention has been made to address these problems, and uses an extruded material as a substrate having a groove for fitting a heat dissipation fin and left and right projecting walls for caulking the heat dissipation fin and also serving as a guide for mounting the heat dissipation fin. This eliminates the need for the grooving process using a metal saw, and the above-mentioned protruding wall section makes the caulking work of the heat dissipation fin easier and faster. Since it depends on the plate-shaped projecting wall portion having a large height, the caulking strength is sufficiently increased to ensure reliable caulking connection of the radiation fin to the substrate.

That is, the gist of the present invention is to
A number of grooves or V-grooves for fitting heat dissipation fins are provided, and fins that also serve as installation guides for heat dissipation fins are provided on the left and right sides of these grooves and have a height sufficiently large relative to the depth of the grooves. The substrate is an extruded aluminum or aluminum alloy material having a cross-sectional shape in which a plate-shaped protruding wall portion for caulking is erected in a V-shaped wing-like state, and heat dissipation fins are fitted into the grooves of the substrate and erected. The method of manufacturing a heat radiator is characterized in that the left and right plate-shaped projecting wall portions are closed so as to be joined to both sides of the heat radiating fin, and the heat radiating fin is caulked between them. It contains the objectives of the period.

The depth of the groove mentioned above and the height of the protruding wall that is sufficiently large relative to the depth of the groove are determined as appropriate, taking into consideration the size of the heat dissipation fin and the required caulking strength between the fin and the board. Ru. In order to further strengthen the connection between the fins and the protruding wall, it is effective to roughen or roughen the contact portion of the fin and/or the protruding wall.

Further, it is advantageous for the fin caulking operation and caulking strength to narrow the V-shaped opening of the projecting wall portion to 40 degrees or less.

〔Example〕

The present invention will be specifically explained below with reference to embodiments shown in the drawings.

Embodiment 1 As shown in FIG. 1A, the substrate 1 is made of an extruded aluminum or aluminum alloy material, and a large number of heat dissipation fin fitting grooves 2 each having a U-shaped cross section are carved in parallel and at equal intervals on both sides. At the same time, on the left and right sides of these grooves 2, projecting walls 3, 3 for mounting guides for heat radiation fins and for caulking the heat radiation fins, each having a height sufficient for the depth of the grooves 2, are set at a V-shaped opening of about 40 degrees. It has a structure that stands upright. The width of the groove 2 is such that the heat dissipation fin 4 can be fitted therein.

Therefore, as shown in FIG. The parts 3, 3 are raised so as to be closed from the left and right sides, and the radiation fin 4 is sandwiched between the left and right projecting wall parts 3, 3, and the radiation fin 4 is caulked to the substrate 1. As a result, the lower end edge of the heat dissipation fin 4 is fitted into the groove 2, and the fin 4 following this is fitted into the groove 2.
The projecting wall portions 3, 3 having sufficient height are closely attached to the lower part of the holder.

At this time, sufficient caulking strength of the heat dissipating fins 4 to the substrate 1 is ensured by the fitting contact with the grooves 2 and the pressure contact between the projecting wall portions 3, 3 having a sufficient height.

Embodiment 2 In this embodiment, as shown in FIGS. 2A and 2B, the heat dissipation fin fitting grooves 2 are V-shaped, and the V-shaped opening degree is made to match the V-shaped opening degree of the projecting wall portion 3. This example is the same as Example 1 except that the strips 2 and the protruding wall portions 3 are formed only on one side of the substrate 1.

In this case, the lower end of the heat dissipation fin 4 is at the V of the groove 2.
The left and right protruding walls 3, 3 act to hold it under pressure while it is wedge-shaped inside the shape.

[Brief explanation of drawings]

FIGS. 1A and 2B are an overall view of a board according to Embodiment 1 of the present invention and a diagram illustrating the state in which heat dissipation fins are attached to the board, and FIGS. FIG. 3 is an overall view of a related board and a diagram showing a state in which heat dissipation fins are attached to the board. 1... Board, 2... Groove for fitting heat dissipation fin, 3
... Projection wall for heat dissipation fin installation guide and caulking, 4
...heat dissipation fin.

Claims (1)

[Claims] 1 A large number of U-groove or V-groove heat dissipation fin fitting grooves are provided on one or both sides, and heat dissipation fins having a height sufficiently large relative to the depth of the grooves are provided on the left and right sides of these grooves. The substrate is an extruded aluminum or aluminum alloy material with a cross-sectional shape in which a plate-shaped protruding wall portion for fin caulking that also serves as an installation guide stands up in a V-shaped wing-like state, and heat dissipation fins are installed in the grooves of the substrate. A method for producing a heat radiator, which comprises: fitting and raising the left and right plate-shaped protruding walls to join both sides of the heat dissipation fin, and caulking the heat dissipation fin therebetween.