JPH0818191B2 - Radiator manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a radiator in which the height of the tips of the tongue fins can be made uniform when the tongue fins are formed by scraping the skin of the material.

[0002]

2. Description of the Related Art Generally, a radiator (heat sink) incorporated in an audio device or the like for suppressing a temperature rise of a semiconductor element such as a transistor or an IC is known. In this type of radiator manufacturing method, a plurality of tongue-shaped fins are integrally formed on the surface of the material by scraping up the skin of the aluminum material with a cutting tool.

By the way, in recent years, a plurality of grooves are provided on the surface of the material, and the cutting surface of the cutting tool is alternately inclined at different angles, and the skin of the material between the grooves is cut by the cutting tool. A manufacturing method has been proposed in which the tongue-shaped fins are arranged in a zigzag pattern at the raising stage (for example, Japanese Patent Publication No. 53-10297).

According to this, since the respective tongue-shaped fins are arranged in a zigzag pattern, there is an advantage that the efficiency on the air side is improved and the heat dissipation efficiency of the radiator is improved.

[0005]

However, in the conventional manufacturing method described above, the tongue fins can be arranged in a staggered manner at the step of forming the tongue fins, but the height of the tip of the tongue fins is increased. There is a problem that they cannot be aligned. If the heights of the tongue-shaped fin tips cannot be aligned, the end surfaces of the tongue-shaped fin tips will not align, so when installing this into an audio device, etc. There is a problem that a space is created between the parts and the wall surface of the housing, and the assembling space is wasted, and the ease of assembling becomes extremely poor.

Therefore, an object of the present invention is to solve the above-mentioned problems of the conventional technique and to manufacture a radiator in which the heights of the tips of the tongue fins can be made uniform at the stage of forming the tongue fins. To provide.

[0007]

In order to achieve the above object, the present invention provides a plurality of grooves on the surface of a raw material, and scrapes the skin of the raw material between the grooves with a cutting tool, In the method of manufacturing a radiator in which multiple tongue-shaped fins are formed on the surface of the material, the height of the material skin between the grooves is staggered and the guide surface of the cutting tool is markedly different. It is characterized in that the height of the tip of the tongue fin is made uniform at the stage of forming the tongue fin by shaving the skin so as to incline corresponding to the height of the skin.

[0008]

According to the present invention, since the height of the surface skin of the material is staggered alternately, and the guide surface of the cutting tool is provided with an inclination corresponding to the height of the surface skin having the height, At the stage of forming the tongue fins by scraping the skin of the material with a cutting tool, the total length of the tongue fins protruding backward is increased by the difference in the height of the skin, so The heights become equal (which would otherwise be lower than other tongue fins), resulting in a uniform tongue fin tip height.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a radiator according to the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 denotes a material made of aluminum. The surface of this material 1 has multiple grooves 3,3
... 3 is engraved, and the skin 5 of the material 1 between the groove 3 and the groove 3
Are shaving by the cutting tool 7. Then, when these skins 5 are scraped up, as shown in FIG. 2, each skin 5 constitutes a tongue-shaped fin 9, whereby a radiator 11 is formed.

However, according to this embodiment, as shown in FIG. 1, the height of the skin 5 of the blank 1 is staggered with heights A and B, and the guide surface 7a of the cutting tool 7 has the same height. , Slopes a and b corresponding to the height of the epidermis 5 with heights A and B are attached. That is, the guide surface 7a corresponding to the high skin 5 is provided with an inclination a of a gentle angle, and the guide surface 7a corresponding to the low skin 5 is provided with an inclination b of a large angle.

Next, the operation of this embodiment will be described.

As shown by an imaginary line in FIG. 1, when a cutting tool 7 is applied to the skin 5 of the material 1 and pushed forward, the material 1
The horizontal row of skins 5 are simultaneously scraped up. Next, the cutting tool 7 is pulled up, the cutting tool 7 is applied to a slightly retracted position, and the cutting tool 7 is extruded forward again. This time, the next horizontal row of skins 5 is scraped up. When this operation is repeated,
As shown in FIG.
And the radiator 11 is formed by this.

Therefore, according to this embodiment, the guide surface 7a of the cutting tool 7 has the inclinations a,
Since b is attached, the tongue fin 9 in the portion with the small inclination a projects rearward more than the tongue fin 9 in the portion with the large inclination b. , The tongue fins 9 are arranged in a staggered pattern.

Therefore, according to the radiator manufactured by this method, as shown in FIG. 2, the efficiency on the air side with respect to the air flow in the direction of the arrow 13 is improved, so that it is more efficient than the conventional radiator. The heat dissipation efficiency can be improved.

Further, according to this embodiment, since the height A and the height B of the outer skin 5 of the material 1 are alternately provided, the step of forming the tongue-shaped fins 9 by scraping up the outer skin 5 Since the total length of the tongue fins 9 projecting rearward is increased by the difference in height, the heights of all the tongue fins 9 are equal (the heights of the other tongue fins 9 are originally higher than those of other tongue fins 9). Becomes lower), and as a result, the heights of the tongue-shaped fin tips 9a can be made uniform.

Therefore, in the radiator manufactured by this method, the end faces on the side of the tongue fins 9a are aligned. Therefore, when the radiator is assembled into an audio device or the like, the tips of the tongue fins 9 having a low height and other ends are not formed. Since there is no gap between the parts and the wall surface of the housing, it is possible to eliminate the inconvenience such as waste of the assembling space, and it is extremely convenient to use.

Further, the cutting tool 7 according to the above-mentioned embodiment is constituted by the tool holder 7a and the tool 7b which are divided into two parts. According to this, the inclinations a and b of different angles are alternately arranged.
Need only be attached to the guide surface of the bite retainer 7a and need not be attached to the bite 7b itself, making the tool extremely easy, and even if the bite 7b wears,
The polishing is extremely simple and effective.

Although the present invention has been described based on the embodiment, it is clear that the present invention is not limited to this.

[0020]

As is apparent from the above description, according to the present invention, the height of the skin of the material between the grooves is alternately changed and the guide surface of the cutting tool is changed. Since the slope corresponding to the height of the epidermis is provided, the heights of the tips of the tongue fins can be perfectly aligned at the stage of scraping up the epidermis to form the tongue fins. Therefore, since the end surfaces of the tongue-shaped fin tips are perfectly aligned, when assembled in an audio device, there is no gap between the tongue-shaped fin tips and other parts or the wall surface of the housing. There is no waste in the built-in space, and it has the effect of becoming a radiator that is extremely easy to use.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a method for manufacturing a radiator according to the present invention.

FIG. 2 is a perspective view showing a radiator manufactured by this manufacturing method.

[Explanation of symbols]

 1 Material 3 Groove 5 Skin 7 Cutting Tool 7a Guide Surface 9 Tongue Fin 11 Heat Sink

Claims (1)

[Claims] 1. A radiator in which a plurality of grooves are provided on the surface of a material, and the skin of the material between the grooves is cut up by a cutting tool to form a plurality of tongue-shaped fins on the surface of the material. In the manufacturing method, the height of the outer skin of the material between the grooves is staggered, and the guide surface of the cutting tool is inclined to correspond to the height of the upper and lower skin, and the outer skin is scraped. A method for manufacturing a radiator, characterized in that the heights of the tips of the tongue fins are made uniform at the stage of raising tongue fins.