JPH06151658A - Manufacture of plate-fin type radiator - Google Patents

Abstract

PURPOSE:To provide a method manufacturing a plate-fin type radiator whose plate-fin thicknesses can be reduced and, further, whose plate-fin pitches can be fine and, as a result, whose radiation performance can be significantly improved. CONSTITUTION:A process in which a brazing sheet 3 whose both surfaces are cladded with solder material is placed on the one surface of a radiator base board 1 and a required number of plate-fine 2 are placed on the brazing sheet 3 with space keeping plates 5 provided between respective adjacent plate-fins 2 in parallel with each other so as to be approximately perpendicular to the radiator base 1, a process in which brazing between the radiator base 1 and the plate-fins 2 is performed and a process in which the space keeping plates 5 are drawn out of the spaces between the adjacent plate-fins 2 are provided. It is preferable to subject the assembled unit to a thermal treatment for aging curing. Further, it is preferable to form a plurality of protrusions on the upper and lower parts of both the surfaces of the space keeping plate 5.

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 plate fin type radiator used as a radiator for ICs, a radiator for Peltier elements, a radiator for motors, a radiator for electronic control parts, and the like.

In this specification, aluminum is meant to include pure aluminum and aluminum alloys.

[0003]

2. Description of the Related Art The following three methods are known as conventional methods for manufacturing a plate fin type radiator.

First, in the first method, a groove having a width corresponding to the fin thickness is formed on the plate fin mounting surface of the heat dissipation board, the ends of the plate fins are fitted into the groove, and then the heat dissipation board and the plate fin are fitted. This is a method of joining and with an adhesive.

However, in this method, since bonding is performed using an adhesive, there is a problem that the heat conductivity between the heat radiating substrate and the plate fin is deteriorated, and the heat radiating performance of the resulting radiator is poor.

The second method is a block cutting method in which a rectangular parallelepiped metal block is cut and raised to form a plate fin.

However, in this method, as the number of plate fins to be formed increases, the number of cutting steps increases, and the fins bend if the cutting blade is not moved little by little during the cutting operation. There was a problem that it took a long processing time. Further, regarding the relationship between the fin gap width and the fin height, for example, when the fin height is 20 mm, the fin thickness is 1.0 mm and the fin gap width is 2 mm, and the fin thickness and fin gap width are smaller than these limits. It is not possible. Therefore, there is a problem in that the surface area of the radiator cannot be increased so much that the heat radiation performance is poor.

The third method is an aluminum extrusion molding method, which is the most frequently used manufacturing method when the radiator is made of an aluminum material.

However, in this method, there is a restriction on the relationship between the fin pitch and the fin height due to the so-called tong ratio, and the fin gap width is 1/3 to 1/1 / the fin height.
The limit is about 4, and it is impossible to obtain a radiator with a fin pitch smaller than this. Therefore, the surface area of the radiator cannot be increased as in the case of the above-mentioned cutting method, and there is a problem that the heat radiation performance is insufficient for heat radiation of the high-density IC element which has become popular in recent years.

The object of the present invention is to solve the problems of the above-mentioned conventional method, to make it possible to make the plate fin thickness small and the fin pitch fine, and therefore the plate fin type radiator having a significantly improved heat dissipation performance. It is to provide a method capable of efficiently producing

[0011]

SUMMARY OF THE INVENTION The present invention has been devised to achieve the above object, and the first invention of the present invention comprises a plurality of aluminum plate fins on one surface of an aluminum heat dissipation board. A method of manufacturing a radiator, in which a brazing sheet having a brazing material clad on both sides is laminated on one surface of a heat radiation substrate, and a required number of plate fins are adjacent to each other on the brazing sheet surface on the heat radiation substrate. Steps of arranging the spacers in parallel with each other with a spacing plate interposed between the fins and substantially vertical to the heat dissipation substrate, brazing the heat dissipation substrate and the plate fins, and taking out the spacing plate from between the plate fins It is a method of manufacturing a plate fin type radiator including the following steps.

A second aspect of the present invention is a method for manufacturing a radiator having a plurality of aluminum plate fins on one surface of an aluminum heat dissipation board, wherein a brazing material sheet is placed on one surface of the heat dissipation board to dissipate the heat dissipation board. A step of arranging a required number of plate fins on the brazing filler metal sheet surface in parallel with each other with a spacing plate interposed between the fins adjacent to each other and in a substantially vertical shape with respect to the heat dissipation board; It is a method of manufacturing a plate fin type radiator including a step of brazing the heat dissipation substrate and the plate fins, and a step of taking out the spacing plate from between the plate fins.

A third aspect of the present invention is a method of manufacturing a radiator having a plurality of aluminum plate fins on one surface of an aluminum radiator board, the radiator board comprising a brazing sheet in which a brazing material is clad on one surface. A step of arranging a required number of plate fins on the brazing material surface in parallel with each other with a spacing plate interposed between the fins adjacent to each other and substantially vertically to the heat dissipation board; It is a method for manufacturing a plate fin type radiator, which comprises a step of brazing the plate fins and a step of taking out the spacing plate from between the plate fins.

The heat dissipation substrate used in the present invention is preferably made of an aluminum alloy, more preferably a heat treatment type aluminum alloy. The heat dissipation substrate has a length of 10 to 10, for example.
It has a width of 150 mm, a width of 10 to 150 mm, and a thickness of 1 to 5 mm.

The plate fin used in the present invention is preferably made of an aluminum alloy, and more preferably made of a heat treatment type aluminum alloy, like the heat dissipation substrate. The plate fin has, for example, a length of 10 to 150 mm, a width (height) of 5 to 80 mm, and a thickness of 0.3 to 1 mm.

It is preferable that the spacing plate used in the present invention has a plurality of small projections formed on the upper and lower sides of each surface. The shape of the small protrusion is arbitrary, and is, for example, a hemispherical shape or the like. Further, it is more preferable that a plurality of legs are formed at the lower end of the spacing plate.

The material of the spacing plate is preferably stainless steel or the like. Also, the height of the spacing plate should be approximately the same as or slightly lower than the height of the plate fins, and the thickness should be the same as the fin gap width, or if small protrusions are formed on both sides of the spacing plate. It is preferable that the thickness of the spacing plate including the small protrusions is the same as the fin gap width. For example, this thickness is 0.3-1 mm. The length of the spacing plate is preferably longer than the length of the plate fins for the later extraction process.

In the manufacturing method of the present invention, it is preferable to perform heat treatment (age hardening) after brazing to improve the yield strength of the material of the heat dissipation substrate and the plate fin.
The condition of this heat treatment is, for example, aluminum alloy A606.
In the case of 3, it is 200 ° C. for 3 hours.

[0019]

In the manufacturing method of the present invention, since the heat dissipating substrate and the plate fins are brazed, there are restrictions on the arrangement of the plate fins on the heat dissipating substrate such as the conventional block cutting method and aluminum extrusion molding method. Without
The fin thickness and fin gap width can be arbitrarily selected up to a minimum of 0.3 mm. As a result, the heat dissipation area per unit area of the heat dissipation board can be increased, and the heat dissipation performance of the radiator can be greatly improved.

Further, in the manufacturing method of the present invention, unlike the conventional method, an adhesive is not used and a brazing material is used, so that the thermal conductivity from the heat radiating substrate to the plate fin is not lowered.

Further, when a plurality of small projections are formed on the upper and lower sides of the spacing plate, respectively, the spacing plate comes into contact with the surface of the plate fin only at the tips of the small projections, so that Since the resistance between the plate fins and the plate fins is reduced, the operation for taking out the spacing plate from between the plate fins after brazing becomes very easy. Further, during brazing, a constant gap can be secured between the spacing plate and the plate fins, heat conduction is improved, and uniform heating can be performed, so that the quality of the radiator becomes stable.

[0022]

Embodiments of the present invention will now be specifically described with reference to the drawings.

[Embodiment 1] FIG. 1 shows an example of a radiator manufactured by the method of the first invention of the present invention.
(0) is a large number of plate fins (2) on one side of the heat dissipation board (1).
Is equipped with.

The method of the first invention will be described below in the order of steps with reference to FIGS.

First Step As a heat dissipation substrate (1), a heat treatment type aluminum alloy (A6063) having a length of 60 mm, a width of 60 mm and a thickness of 3.0 mm.
An extrusion plate was used. An aluminum brazing sheet in which a brazing material having a length of 60 mm, a width of 60 mm and a thickness of 1.6 mm is clad on both sides on one side of the heat dissipation board (1).
(3) was piled up.

Next, on the surface of the brazing sheet (3) on the heat dissipation board (1), a required number of plate fins (2) and a spacing plate (5) between adjacent plate fins (2) are provided. They were placed in parallel with each other and substantially perpendicular to the heat dissipation substrate (1) for setting (see FIGS. 2 and 4).

As the plate fin (2), a heat-treatable aluminum alloy (A6061) plate having a length of 60 mm, a height of 20 mm and a thickness of 0.5 mm was used.

Further, as the spacing plate (5), a length of 80 m
A stainless steel plate having m, a plate thickness of 0.3 mm, and a width (height) of 18 mm was used. The space retaining plate (5) has four hemispherical small protrusions (6) on each of the upper and lower sides, and four legs at each of the lower end and the upper end.
(7) is formed. The height of the small protrusions (6) is 0.1 mm, and the total thickness of the spacing plate (5) is 0.5 mm, combined with the thickness of the plates (see FIGS. 3A and 3B), and the fin gap width is 0. It will be 0.5 mm (see Fig. 4).

Second Step Next, the radiator component member after the setting is completed is moved up and down 2
It was sandwiched between a pair of stainless steel brazing plates (8) and secured with four spring clips (9). This is put in the furnace of the brazing device, and the temperature of 600
The heat dissipation substrate (1) and the brazing sheet (3), and the brazing sheet (3) and the lower ends of the plate fins (2) were joined together at ℃ (see FIG. 5).

Third Step After brazing, heat treatment (age hardening) was performed at a temperature of 200 ° C. for 3 hours.

Fourth Step After the heat treatment, both the upper and lower holding plates (8) and the spring clips (9) are removed, and the spacing plate (5) is taken out between the plate fins (2) (see FIG. 6). Heat dissipation board
Radiator with multiple plate fins (2) on one side of (1)
(10) was obtained (see FIG. 1).

According to the above method, the plate fin (2)
The thickness and width (height) of the aluminum plate itself are the thickness and height of the plate fins (2) after manufacturing, and the total thickness of the spacing plate (5) is the fin gap width. Therefore, the height of the plate fins (2) of the radiator (10) can be made extremely high and the fin gap width can be increased without being restricted by the conventional block cutting method or aluminum extrusion molding method. The plate fin type radiator (10) which can be made fine and has a high density can be manufactured.

Further, a plurality of hemispherical small protrusions (6) are formed on the upper and lower sides of the spacing plate (5), respectively, and a plurality of legs (7) are formed at the lower end. Interval holding plate (5)
Since the resistance between the plate fin (2) and the heat dissipation board (1) was small, it was very easy to take out the spacing plate (5) after brazing. In addition, a constant air gap can be secured between the spacing plate (5) and the plate fins (2) during brazing, resulting in better heat conduction and uniform heating, so a radiator (10 )was gotten.

Further, the heat dissipation board (1) and the plate fins
Since the heat-treatable aluminum alloy is used as (2), it can be age-hardened by heat treatment after brazing so that the heat dissipation substrate (1) and the plate fins (2) can maintain a predetermined hardness. When a non-heat treatment type aluminum alloy is used, it cannot be recovered bluntly.

[Embodiment 2] In the first step, the heat dissipation substrate
Place the brazing material sheet (11) on one side of (1), and dissipate the heat dissipation board (1).
Place the required number of plate fins on the upper brazing sheet (11) side.
A radiator provided with a large number of plate fins (2) was manufactured in the same manner as in Example 1 except that (2) was arranged.

According to the above method, a high density plate fin type radiator can be manufactured as in the case of the first embodiment.

[Embodiment 3] In the first step, the heat dissipation substrate
As (13), an aluminum brazing sheet having a brazing material clad on one side was used. A large number of plate fins (2) are provided in the same manner as in Example 1 except that a required number of plate fins (2) are arranged on the brazing material surface of the heat dissipation board (13).
A radiator having the above was manufactured.

According to the above method, a high density plate fin type radiator can be manufactured as in the case of the first embodiment.

[0039]

As described above, according to the manufacturing method of the present invention, the fin thickness and the fin gap width can be made extremely small. As a result, the heat dissipation area per unit area of the heat dissipation board can be made two to three times that of the conventional method, and the high density IC
It is possible to manufacture a radiator having sufficient heat radiation performance for heat radiation of the element.

Further, according to the manufacturing method of the present invention, the fin thickness and the fin gap width can be arbitrarily selected according to the heat radiation performance of the radiator, so that the weight of the radiator can be reduced, and the heat radiation can be further improved. Since necessary perforations can be formed in the substrate in advance, the number of processing steps required for manufacturing the radiator can be reduced and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a plate fin type radiator manufactured by the method of the present invention.

2 to 6 are diagrams for explaining the method of the present invention in order of steps, and FIG. 2 shows a setting state in which plate fins and spacing plates are alternately arranged on one surface of a heat dissipation substrate. It is a perspective view.

FIG. 3A is a perspective view of a spacing plate. 3B ... Horizontal sectional view taken along the line BB of FIG. 3A.

FIG. 4 is a side view of the state shown in FIG.

FIG. 5 is a perspective view showing a state in which brazing holding plates are arranged on both upper and lower surfaces of a radiator component member in a setting state and fixed by spring clips.

FIG. 6 is a perspective view showing a state in which the spacing plate is taken out between the plate fins after the plate fins are formed.

[Explanation of symbols]

 (1)… Heat dissipation board (2)… Plate fin (3)… Brazing sheet (5)… Spacing plate (6)… Small protrusions (10)… Heat radiator

Claims (4)

[Claims] 1. A method of manufacturing a radiator comprising a plurality of aluminum plate fins (2) on one surface of an aluminum heat dissipation board (1), wherein one surface of the heat dissipation board (1) is provided with a brazing material on both sides. Laminate the clad brazing sheets (3), and place the required number of plate fins (2) on the brazing sheet (3) surface on the heat dissipation board (1) next to each other.
The step of arranging the gap holding plate (5) between them in parallel and arranging them in parallel with each other and substantially perpendicular to the heat dissipation board (1), and the heat dissipation board (1) and the plate fin (2) are brazed. And a step of taking out the spacing plate (5) from between the plate fins (2). 2. A method of manufacturing a radiator comprising a plurality of aluminum plate fins (2) on one surface of an aluminum heat dissipation board (1), wherein a brazing material sheet (11) is provided on one surface of the heat dissipation board (1). ) On the heat dissipation board (1)
On the (11) surface, a required number of plate fins (2) are arranged in parallel with the spacing plate (5) interposed between the fins (2) adjacent to each other and with respect to the heat dissipation board (1). A plate fin type consisting of a step of arranging in a substantially vertical shape, a step of brazing the heat dissipation board (1) and the plate fins (2), and a step of taking out the spacing plate (5) from between the plate fins (2). Method of manufacturing radiator. 3. A method of manufacturing a heat radiator comprising a plurality of aluminum plate fins (2) on one surface of an aluminum heat radiation substrate, the heat radiation substrate (13) comprising a brazing sheet in which a brazing material is clad on one surface. On the brazing material surface
Arrange the required number of plate fins (2) in parallel with each other with the spacing plate (5) interposed between the adjacent fins (2) and substantially vertically to the heat dissipation board (13). A method of manufacturing a plate fin type radiator, comprising: a step of brazing the heat dissipation board (13) and the plate fin (2); and a step of taking out the spacing plate (5) from between the plate fins (2). 4. A plurality of small protrusions (6) on each of the upper and lower sides.
Using a spacing plate (5) formed with
The method according to any one of 3 above.