JPH1071462A - Radiation fin and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain high precision, high performance and miniaturization. SOLUTION: Plural fitting recessed parts 7, which are extendedly provided at least on one side of a base board 5 along the flowing direction of a cooling fluid, are formed parallelly to each other at spaces apart in the direction orthogonally crossing the flowing direction of the cooling fluid; and plural fin bodies 6a, which are formed by bending a metallic sheet in a zigzag cross- sectionally and which are extendedly provided parallelly to each other at spaces apart; are integrally formed into a main fin body 6 through connecting parts 6b which are in the direction orthogonally crossing the plane of each fin body 6a. The bent end parts and the connecting parts 6b of the main fin body 6 thus integrally formed are engaged with the fitting recessed parts 7 of the base board 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation fin and a method of manufacturing the same, and more particularly, to a radiation fin capable of forcibly cooling various heat generating parts by a cooling fluid such as air flowing by a fan or the like, and a method of manufacturing the same. About.

[0002]

2. Description of the Related Art Generally, a heat sink capable of forcibly cooling a heat generating portion by forcibly flowing a cooling fluid such as air through a fan or the like to a heat generating portion of various devices such as an inverter, a thyristor, a transistor, and a machine tool. Radiation fins called “radiation fins” are used.

FIG. 9 shows an example of this kind of conventional radiating fin. The conventional radiating fin 1 includes a thyristor,
A substrate 2 having a substantially rectangular planar shape to which heat-generating portions of various devices such as electronic components (not shown) such as transistors are fixed, and a large number of flat fins 3a held upright on the substrate 2 And a fin body 3 composed of The fin bodies 3a constituting the fin body 3 are forcibly blown by a fan (not shown) indicated by an arrow A in FIG. 9 so that the respective side faces of the fin bodies 3a face each other. Are arranged substantially parallel to each other at a desired interval G with respect to a flow direction of a desired cooling fluid such as air to be discharged.

[0004] Such a conventional radiating fin 1 comprises a substrate 2
Are formed by brazing the respective fin bodies 3a at a desired interval G to the surface thereof. When the fins 3a are brazed to the substrate 2, the fins 3a are positioned relative to the substrate 2 using a dedicated positioning jig and a holding jig (both not shown). A weight for pressing the fin body 3a against the substrate 2 is placed on the upper part of each fin body 3a and heated.

[0005] In recent years, the industrial world has always been trying to improve the performance and miniaturization of various products, and the high performance and miniaturization of the conventional radiating fins 1 are also required. Then, in order to increase the surface area of the fin body 3, the spacing G between the fin bodies 3a is reduced and the number of the fin bodies 3a is increased so as to increase the surface area of the fin body 3 in order to improve the performance and reduce the size of the heat radiation fins 1. A configuration in which 3a are arranged at high density is employed.

[0006]

However, in the above-described conventional radiating fins 1, a great deal of labor and time are required for holding the fin body 3 composed of a large number of fin bodies 3a on the substrate 2, which is economical. There was a problem that the burden was large.

Further, the substrate 2 and the fin body 3a formed individually are easily warped. If at least one of the substrate 2 and the fin body 3a is warped, the edge of the fin body 3a does not adhere to the substrate 2; There was a problem that brazing was difficult.

Furthermore, when the fin body 3a is brazed to the substrate 2, the fin body 3a is urged toward the substrate 2 and is heated in a state where the edge of the fin body 3a is in close contact with the substrate 2. 2 or at least one of the fins 3a is warped after brazing.
In some cases, distortion occurs in at least one of them, and there has been a problem that a highly accurate product cannot be stably obtained.

In order to cope with such a problem, a configuration in which a plurality of fin bodies 3a are integrated, for example, a plurality of fin bodies 3a are integrally formed by forming the fin body 3 by an extrusion material, The radiating fins 1 in which the main body 3 is brazed to the substrate 2 are conceivable. When the fin main body 3 is used as a mold, the fin main body 3 can be improved in accuracy and productivity, but each fin body can be improved. The thickness of the fins 3a cannot be reduced, and as a result, the interval G between the fins 3a is narrowed to increase the number of the fins 3a.
a cannot be arranged at high density, and there is a problem that high performance and small size cannot be achieved.

Further, as shown in FIG.
A is formed from an extruded mold material to integrally form a plurality of fin bodies 3a, and the fin body 3A is brazed to the substrate 2 via a brazing sheet BS in which a brazing material R is clad on both sides of a core material made of aluminum in advance. Fin 1A
However, even when the brazing sheet BS is used, similarly to the radiation fins 1, the interval G between the fins 3a is narrowed to increase the number of the fins 3a, thereby increasing the density of the fins 3a. The fin body 3A cannot be placed, cannot achieve high performance and small size, and when brazing with the brazing sheet BS, the fin body 3A
Jig (not shown) made of, for example, stainless steel for pressing the substrate 2 onto the substrate 2 via the brazing sheet BS.
This holding jig absorbs thermal energy during brazing, that is, not only reduces the thermal efficiency during brazing, but also deforms the fin body 3A. There was a point.

The present invention has been made in view of the above points, and has been made of a heat radiation fin capable of achieving high precision, high performance and small size, and a heat radiation fin capable of efficiently producing the heat radiation fin. It is intended to provide a manufacturing method.

[0012]

According to a first aspect of the present invention, there is provided a heat radiating fin having a plurality of fins on a surface of a substrate. In the fin, a plurality of fitting recesses extending along a flow direction of the cooling fluid are formed on at least one surface of the substrate in parallel with each other at intervals in a direction orthogonal to the flow direction of the cooling fluid. A fin in which a plurality of metal plates are bent in a zigzag cross section and extend in parallel with each other at intervals with a plurality of the fin members being integrally formed via a connecting portion in a direction perpendicular to the plane of each fin member. The point is that the bent end portion and the connection portion of the main body are fitted into the fitting concave portions of the substrate.

By adopting such a configuration, a plurality of fins are arranged at high density to achieve high performance and downsizing, and a high-precision fin body is easily held on a substrate with high precision. be able to.

According to a second aspect of the present invention, there is provided a heat radiation fin according to the first aspect, wherein each connecting portion of the fin body to be fitted into the fitting recess of the substrate is on the same plane. The point is formed to be located inside.

By adopting such a configuration, the fin main body can be held with high precision by the substrate.

The features of the radiation fin according to the present invention described in claim 3 of the present invention are described in claim 1 or claim 2.
In the above, the interval between the plurality of fin bodies of the fin main body is formed narrow at both ends in the arrangement direction and wide at the center, and the interval between the plurality of fitting concave portions of the substrate is at least one end of the bent end portion of the fin main body. The point is that it is formed to be fittable.

By adopting such a configuration, it is possible to cope with the distribution of the air pressure and the air volume of the cooling fluid, so that the cooling efficiency can be easily improved and the performance can be easily improved.

According to a fourth aspect of the present invention, there is provided a heat radiation fin according to any one of the first to third aspects, wherein the fin main body is fitted with the substrate. Is fixed at least partially with the joining force of the joining member.

By adopting such a configuration, the fin body can be more reliably held on the substrate.

Further, the heat radiation fin according to the present invention described in claim 5 is characterized in that in claim 4, the joining member is a heat conductive adhesive. As the heat conductive adhesive here, for example, an epoxy adhesive or the like containing a heat conductive filler can be exemplified.

By employing such a configuration, the fin body can be securely and easily held on the substrate.

The radiation fin according to the present invention described in claim 6 is characterized in that in claim 4, the joining member is a brazing material.

By employing such a configuration, the fin body can be securely and easily held on the substrate.

According to a seventh aspect of the present invention, there is provided a heat radiation fin according to any one of the first to sixth aspects, wherein the fin body has a leading end in a flow direction of a cooling fluid of the fin body. The point is that a pointed portion for preventing pressure loss is formed on at least one of the side and the end side.

With such a configuration, the ventilation resistance (pressure loss) of the cooling fluid when the cooling fluid passes through the fin body can be reduced, and the cooling efficiency can be improved.

[0026] Further, a feature of the radiation fin according to the present invention described in claim 8 is that, in any one of claims 1 to 7, at least the fin main body is made of aluminum or an aluminum alloy. On the point.

With such a configuration, the weight of the radiation fin can be reduced.

A feature of the method for manufacturing a radiating fin according to the present invention described in claim 9 is that a metal material is plastically deformed and extends on at least one surface along a flow direction of a cooling fluid. Forming a substrate in which the fitting concave portions are provided in parallel with each other at intervals in a direction orthogonal to the flow direction of the cooling fluid, and a metal plate having a substantially flat shape is plastically deformed and mutually separated at intervals. A plurality of folds extending in parallel are formed, and the metal plate is plastically deformed in a zigzag cross section based on the folds, and a plurality of fins extending parallel to each other at intervals are formed on the plane of each fin. A fin body integrally formed through a connecting portion in a direction perpendicular to the fin body is formed, and the bent end portion and the connecting portion of the fin body are fitted into the fitting concave portion of the board, and the board and the fin body are connected to each other. The point is to unite.

By adopting such a configuration, a high-precision and high-performance radiating fin can be easily manufactured, and the fin body can be a module. That is, the area of the fin main body can be easily changed. Furthermore, when at least the fin body is made of aluminum or an aluminum alloy, the weight of the heat radiation fin can be easily reduced.

The method of manufacturing a radiating fin according to the present invention described in claim 10 is characterized in that, in claim 9, at least a part of a fitting portion between the substrate and the fin body is caulked. The point is to apply.

By employing such a configuration, the fin body can be more reliably held on the substrate.

The method of manufacturing a radiating fin according to claim 11 of the present invention is characterized in that, in claim 9, at least a part of a fitting portion between the substrate and the fin body is joined. The point is that a joining process using members is performed.

By employing such a configuration, the fin body can be more securely held on the substrate.

The feature of the method of manufacturing a heat radiation fin according to the present invention described in claim 12 is that of claim 11
In the above, the joining process is performed using a thermally conductive adhesive as the joining member.

By employing such a configuration, the fin body can be more securely held on the substrate.

The feature of the method of manufacturing a heat radiation fin according to the present invention described in claim 13 is that of claim 11
In the above, the joining process is performed using a brazing material as the joining member.

By adopting such a configuration, the fin body can be more securely held on the substrate.

The method of manufacturing a heat radiation fin according to the present invention described in claim 14 is characterized in that a metal material is plastically deformed and extends on at least one surface along a flow direction of a cooling fluid. A substantially flat plate made of a brazing sheet in which a fitting concave portion is formed in parallel with each other at intervals in a direction orthogonal to the flow direction of the cooling fluid, and a brazing material is clad on both sides or one side of the core material in advance. Forming a plurality of folds extending parallel to each other at an interval by plastically deforming the metal plate having a shape, and forming the metal plates plastically in a zigzag cross section based on the folds and mutually forming A fin body is formed by integrally forming a plurality of fin bodies extending in parallel through a connecting portion in a direction perpendicular to the plane of each fin body, and a bent end portion of the fin body is formed in a fitting recess of the substrate. And articulation And at least a part of the fitting portion between the substrate and the fin main body is joined using a brazing material clad in advance to the fin main body to integrate the substrate and the fin main body. .

By adopting such a configuration, a high-precision and high-performance radiating fin can be easily manufactured, and the fin body can be a module. That is, the area of the fin main body can be easily changed. Further, the substrate and the fin body can be easily and reliably integrated.

The method of manufacturing a radiating fin according to the present invention described in claim 15 of the present invention is characterized in that, in any one of claims 9 to 14, the fin main body is formed. The edge of the metal plate located at least at one end of the fold formed on the metal plate is plastically deformed to prevent pressure loss on at least one of the leading edge and the trailing edge of the fin body in the flow direction of the cooling fluid. The point is to form a point.

By adopting such a configuration, a radiation fin excellent in cooling efficiency can be easily manufactured.

[0042]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

FIGS. 1 and 2 show an embodiment of a radiation fin according to the present invention. FIG. 1 is a schematic partial perspective view showing the entire structure, and FIG. FIG. 3 is a perspective view, and FIG. 3 is a partially enlarged cross-sectional view for explaining an arrangement state of the fin body of the fin body.

As shown in FIG. 1, the heat radiation fin 4 of the present embodiment has a substrate 5 and a fin body 6 held on the upper surface which is one surface of the substrate 5.

As shown in FIG. 1, the substrate 5 has a width WB of 100 to 60 fixed to a heat generating portion (not shown).
About 0 mm, in this embodiment, 200 mm, length LB is about 200 to 400 mm, in this embodiment, 330 mm, height HB is about 7 to 30 mm,
In the present embodiment, it is formed in a substantially rectangular shape with a plane of 12 mm. On the upper surface, which is one surface of the substrate 5, there are provided a plurality of fitting recesses 7 having a desired depth dimension, in this embodiment, about 3 mm and a substantially rectangular cross section. As shown in detail in FIG. 2, each of the fitting recesses 7 is formed along a flow direction substantially parallel to the flow direction of the cooling fluid indicated by an arrow A in FIG. Is about 3 to 5 mm, and 4 mm in the present embodiment.
The fitting recesses 7 adjacent to each other are arranged in parallel with a spacing GB of about 3 mm.

As shown in FIG. 1, the fitting recesses 7a, 7a located at both ends in the left-right direction in FIG. It is formed smaller than the groove width of the other fitting recesses 7b located between the fitting recesses 7a. However, the fitting recesses 7 located at both ends in the left-right direction in FIG.
The groove widths of a and 7a are made larger than the plate thickness of a fin body 6a described later. The reason why the groove width of the fitting recesses 7a, 7a located at both ends in the left-right direction of the substrate 5 is smaller than the groove width of the other fitting recesses 7b located therebetween is that the fin bodies located at both ends in the left-right direction in FIG. Connecting part 6b connected to 6a
This is for the purpose of reducing the width dimension WB of the substrate 5 located in the left-right direction in FIG. 1 so that the groove widths of all the fitting recesses 7 are essentially equal. Is no problem. In this case, the connecting portions 6 connected to the fin bodies 6a located at both ends in the left-right direction in FIG.
b may be fitted into the fitting recess 7a. Further, the substrate 5
The groove width of the fitting concave portions 7a, 7a located at both ends in the left-right direction of the fin body 6a may be formed to be substantially the same as the plate thickness of the fin body 6a.

The shape of the substrate 5 may be a plane square shape, a plane elliptical shape, a plane circular shape,
What is necessary is just to select from various shapes, such as H shape shape and a square tube shape, as needed, and it is not specifically limited to the shape of the board | substrate 5 of this Embodiment. Also, the dimensions of the substrate 5 may be set according to the shape of the heat generating part, and are not particularly limited to the dimensions of the substrate 5 in the present embodiment. Further, when the shape of the substrate 5 is a rectangular tube, the fitting recess 7 may be provided on a plurality of inner surfaces.

The fin body 6 is, as shown in FIG.
It is formed by bending a thin flat metal plate in a zigzag shape. More specifically, the fin main body 6 of the present embodiment is formed by bending a metal plate into a continuous square wave so that a plurality of substantially flat fin bodies 6a having the same height dimension HF are formed. The fin body 6a is integrally formed via a substantially flat connecting portion 6b in a direction orthogonal to the plane of the fin body 6a, and has a width dimension WF of about 90 to 590 mm as a whole,
In the present embodiment, the length LF is 190 mm and the length LF is 2
About 00 to 400 mm, and in this embodiment, about 330
mm and a height dimension HF of about 60 to 150 mm, and in this embodiment, 75 mm. As shown in detail in FIG. 3, each of the fin bodies 6a is formed along a flow direction substantially parallel to the flow direction of the cooling fluid indicated by the arrow A in FIG. Fin body 6
The pitch PF is 3 to
Fin bodies 6a adjacent to each other are arranged in parallel with an interval GF of about 3 mm so as to be about 5 mm, and in this embodiment about 4 mm. That is, the fin main body 6a of the present embodiment is a module.

As shown in FIG. 3, a desired inclination angle θ is provided at the leading edge and the trailing edge of the fin body 6 in the flow direction of the cooling fluid indicated by the arrow A in FIG. A point 8 (only part of which is shown in FIG. 3) for preventing pressure loss is formed. As shown in FIG. 3, the pointed end 8 is formed in an isosceles triangular cross section which is substantially plane-symmetric with the center plane of the plate thickness of the fin body 6 as a plane of symmetry.
Is tapered so that its thickness gradually decreases as the distance from the edge of the fin body 6 increases. further,
As shown in FIG. 3, each inclination angle θ of the tip 8 is formed to be about 45 degrees with respect to the distribution direction A in the present embodiment. The inclination angle θ of the point 8 may be in a range of 5 to 60 degrees, preferably in a range of 15 to 45 degrees with respect to a direction parallel to the flow direction of the cooling fluid indicated by the arrow A in FIG. In particular, the present invention is not limited to the angle θ in the present embodiment. It should be noted that the inclination angle θ of the tip 8 located on the leading side and the inclination angle θ of the tip 8 located on the trailing side (not shown) with respect to the flow direction of the cooling fluid indicated by the arrow A in FIG.
May be changed as necessary.

In this embodiment, the lower end of the bent end of the fin body 6 and the lower end of the connecting portion 6b in the vertical direction shown in FIG. The bent end portion of the fin body 6 located on the side and the connecting portion 6b are fitted, and the fin body 6 as a module is held on the substrate 5.

Next, an example of an embodiment of a method of manufacturing the radiation fins 4 according to the present embodiment will be described with reference to FIG.

FIG. 4 is a block diagram showing an example of an embodiment of a method for manufacturing a radiation fin according to the present invention.

As shown in FIG. 4, the method of manufacturing the heat radiation fins 4 according to the present embodiment includes a substrate forming step 9 for individually forming the substrate 5 and a fin forming for forming the fin body 6. Step 10 and a fin forming step 1 at a predetermined position of the substrate 5 formed by the substrate forming step 9.
And an assembling step 11 for holding the fin main body 6 formed by the fin body 0.

The above steps will be described in more detail.

In the substrate forming step 9, a metal material made of aluminum or an aluminum alloy is used as a blank (not shown), and the blank is formed into a known shape by using a mold (not shown) having a predetermined shape. By performing plastic working such as working, forging, or the like, at least one surface of the plurality of fitting recesses 7 extending along the flowing direction of the cooling fluid is separated by a space GB in a direction orthogonal to the flowing direction of the cooling fluid. Thus, a finished product (substrate 5) provided in parallel with each other is obtained. Various kinds of machining (cutting, grinding, etc.) may be performed as necessary.

The metal material used for the substrate 5 is as follows.
Other materials having excellent thermal conductivity, such as copper, copper alloy, magnesium, and magnesium alloy, may be used according to the necessity such as use conditions.

Further, as another method of forming the substrate 5, a metal material made of aluminum or an aluminum alloy in a molten state is poured into a mold (not shown) having a predetermined shape, and a casting process such as die casting or squeeze casting is performed. And a method of performing various types of machining (cutting, grinding, etc.) as necessary.

The fin forming step 10 is for forming a fin body 6 by plastically deforming the blank into a zigzag cross section using a flat metal plate made of aluminum or an aluminum alloy as a blank. It has a forming step 12, a fold forming step 13, and a bending step.

The point forming step 12 is for forming the point 8 for preventing pressure loss by plastically deforming the flat blank 15. In the present embodiment, a press die having a predetermined shape is used. And presses (both not shown) are used to plastically deform the two opposing edges of the four sides of the blank 15 located at both ends of the fold 16 to be described later. An equilateral triangular tapered point 8 for preventing pressure loss is formed.

The fold forming step 13 includes a blank 15
When the fin body 6 is formed by plastically deforming the fin body 6 into a zigzag cross section, this is a step necessary to easily obtain a high-precision fin body 6, and in the present embodiment, a press die having a predetermined shape is used. Blank 1 using a press (both not shown)
5 are plastically deformed, and as shown in FIG. 5, the front and back surfaces 1 extending parallel to each other at a predetermined interval on the surface of the blank 15.
A plurality of folds 16 having a pair of substantially triangular cross sections are formed. The interval GW of the fold 16 is set according to the shape of the fin body 6. In the present embodiment, two folds 16 having a short distance from each other can be formed simultaneously. That is, the distance G between two folds 16 that are close to each other
WP is formed at the same time by a press die (not shown), and a distance GWH between two folds 16 having a long distance therebetween.
Is formed by a feed amount of the blank 15 by a feed mechanism of a press (not shown).

The fold 16 formed on the blank 15
May be formed on any one of the surfaces of the blank 15, preferably on the surface facing in the bending direction. further,
All the folds 16 formed on the blank 15 may be determined by the feed amount of the blank 15 by a feed mechanism of a press (not shown).

In this embodiment, the fin body, which is the height of the fin main body 6, is controlled by controlling the feed amount of the blank 15 by a feed mechanism of a press (not shown) when forming the fold 16 in the blank 15. The height dimension HF of 6a can be easily changed. That is, by changing the feed amount of the blank 15 by the feed mechanism of the press (not shown) when forming the fold 16 as necessary, it is possible to easily form the fin body 6 having a different surface area that contributes to cooling of the heat generating part. Can be.

The order of the point forming step 12 and the fold forming step 13 may be reversed or the point forming step 12 may be reversed.
And the fold forming step 13 may be performed simultaneously to form the pointed end 8 and the fold 16 at the same time.

Also, in the present embodiment, the point 8
By changing the shape of the cavity of a press die (not shown) used when forming the shape, the position and shape of the pointed end 8 can be easily changed.

The bending step 14 is for plastically deforming the flat blank 15 having the fold 16 and the pointed end 8 into a zigzag cross section to integrally form the fin body 6. In this case, the blank 15 is bent in a zigzag cross section using a press die having a predetermined shape and a press (both not shown) according to the fold 16 formed in the blank 15 so that a finished product (fin body 6) is obtained. Has become.

The blank 15 made of a flat metal plate made of aluminum or an aluminum alloy for forming the fin body 6 may be a long hoop material or a sketch material. And blank 1
When a long hoop material or a sketch material is used as 5, for example, the tip 8 and the fold 1
After the blanks 6 are continuously formed, the blank 15 may be cut into a predetermined size, or the blanks 15 may be cut into a predetermined size, and then the pointed portions 8 and the folds 16 may be formed.

The assembling step 11 is for holding the fin body 6 on the substrate 5. The assembling step 11 of the present embodiment includes, for example, a fitting assembling step 11 A using only fitting, caulking. Can be selected as required from a caulking assembly process 11B using a bonding member, a bonding assembly process 11C using a bonding member, and the like. It is also possible to combine two or more of the fitting assembly process 11A, the caulking assembly process 11B, and the joining assembly process 11C.

The fitting and assembling step 11A includes the fin body 6
In this embodiment, the bent end portion and the connecting portion 6b of the fin body 6 located at the lower end portion in the height direction shown in the vertical direction in FIG. 1 and each of the bent end portions connected to the bent end portion. The connecting portion 6b is fitted into the fitting concave portion 7 of the substrate 5 with an interference to perform a fitting process to obtain a finished product (radiation fin 4).

The caulking assembling step 11B includes the bending end portion and the connecting portion 6b of the fin main body 6, and in this embodiment, the fin main body 6 located at the lower end side in the vertical direction shown in FIG. The bent end portion and each connecting portion 6b connected to the bent end portion are inserted into the fitting concave portion 7 of the substrate 5 by, for example, 0.2.
After loosely fitting with a clearance of about 0.3 mm, at least a part of the fitting portion between the fin body 6 and the substrate 5 is caulked to obtain a finished product (radiation fin 4).

The joining and assembling step 11C is performed in the fin body 6
In this embodiment, the bent end portion and the connecting portion 6b of the fin body 6 located at the lower end portion in the height direction shown in the vertical direction in FIG. 1 and each of the bent end portions connected to the bent end portion. The connecting portion 6b is inserted into the fitting concave portion 7 of the
After fitting with a clearance of about 0.3mm,
At least a part of the fitting portion between the fin body 6 and the substrate 5,
For example, the right and left ends shown in the left-right direction in FIG. 1 are fixed with the joining force (adhesive force) of a joining member (not shown). More specifically, bonding with an adhesive such as an epoxy-based adhesive containing a filler having good thermal conductivity. Finished product (radiation fins 4) by brazing with brazing material or the like and fixing it.
Is to be obtained.

That is, the structure of the assembling step 11 is as follows.
Various forms such as fitting, caulking, joining, etc. can be selected according to the design force, the holding force of the fin body 6 held on the substrate 5 depending on the use conditions, and the like. Even when joining is used, an adhesive or a brazing material can be selected as a joining member.

The heat radiation fins 4 of the present embodiment having the above-described configuration are formed by holding the fin body 6 as a module on the substrate 5, and the fin body 6 can be easily held on the substrate 5. Therefore, as compared with the conventional radiating fins 1, the labor and time required for assembly can be reduced, the productivity can be reliably improved, and the economical burden can be surely reduced. By using the fin main body 6 as a module, the substrate 5 and the fin main body 6 having different cooling performances can be easily combined according to the needs such as use and use conditions, and one kind can be efficiently produced in large quantities. In addition, high-mix low-volume production can be performed efficiently.

The fin body 6 of the heat radiation fin 4 according to the present embodiment is formed by bending a single metal plate, unlike the related art, and has a plurality of fin bodies 6a. Since the fins 6a can be integrally formed using a thin metal plate, the interval GF between the fins 6a is narrowed, the number of the fins 6a is increased, and the fins 6a can be easily arranged at high density. Higher performance and smaller size can be achieved.

Further, in the fin body 6 of the heat radiation fin 4 of the present embodiment, the fold 16 is formed in the blank 15 and the fold 16 is bent in accordance with the fold 16, so that the foldability is improved and Height H of each fin body 6a
Dimensional accuracy such as F and interval GF can be reliably improved. That is, it is possible to form the high-precision fin main body 6 that is easy to bend the blank 15 and has excellent dimensional accuracy.

Further, by determining all the folds 16 formed on the blank 15 by the feed amount of the blank 15 by a feed mechanism of a press (not shown), the fin body 6 is formed.
The height dimension HF and the interval GF of a can be easily changed.

That is, the interval GF between the fin bodies 6a is narrowed at both ends in the arrangement direction in accordance with the fin body 6A having a shape in which the height dimension HF of the fin bodies 6a varies depending on the position, or the wind pressure and the amount of air of a fan (not shown). The fin body 6B formed widely at the center can be easily formed. FIG. 6 shows a radiation fin 4A using a fin main body 6A having a shape in which the height dimension HF of the fin body 6a varies depending on the position, and the intervals GF between the fin bodies 6a are arranged in accordance with the wind pressure and air volume of a fan (not shown). FIG. 7 shows a radiation fin 4B using a fin body 6B formed narrow at both ends in the direction and wide at the center. The height H of the fin body 6a depends on the position shown in FIG.
When F forms the fin body 6A having a different shape,
Forming such that one end of the bent end of the fin body 6A, that is, the lower end shown below in FIG. 6 is located in the same plane, increases the accuracy after the fin body 6A is held on the substrate 5. It is important to keep. Further, FIG.
In the case of using the fin body 6B in which the distance GF between the fins 6a is narrow at both ends in the arrangement direction and wide at the center in accordance with the wind pressure and the flow rate of the fan (not shown) shown in FIG. It is important to use the substrate 5B in which the groove width and the interval GB of the fitting concave portion 7 correspond to each other.

Further, the radiation fins 4 of the present embodiment
In the fin body 6, a point 8 for preventing pressure loss is formed at the leading edge and the trailing edge of the fin body 6 in the flow direction of the cooling fluid. In this case, it is possible to reliably prevent turbulence, pressure loss, and increase in flow resistance when the cooling fluid generated between the fins 6a passes between the fins 6a. It is possible to realize a simplified arrangement. Note that the pointed portion 8 may be provided when the ventilation resistance when the cooling fluid passes between the fin bodies 6a increases, and may not be provided when the ventilation resistance does not increase.

The radiating fins 4 of the present embodiment are located in the fitting concave portions 7 of the substrate 5 at the bent end portions and the connecting portions 6b of the fin body 6, that is, at the lower end side shown in FIG. Since the bent end portion and each connecting portion 6b connected to the bent end portion are formed in the same plane, the fin body 6 can be easily and accurately fitted into the fitting concave portion 7. . The fin body 6 is held by the substrate 5 by fitting the bent end portion of the fin body 6 and the connecting portion 6b connected to the bent end portion into the fitting concave portion 7. 5, the accuracy of the interval GF between the respective fin bodies 6a of the fin body 6 can be kept high. That is, the radiation fins 4 with high precision can be easily formed.

Further, the fin body 6 is held by the board 5 by fitting the bent end of the fin body 6 and the connecting portion 6b connected to the bent end into the fitting recess 7 of the board 5. When the fin body 6 is brazed to the substrate 5, even if at least one of the substrate and the fin body 6 has a warp, the warp can be absorbed by the depth of the fitting recess 8, so that the brazing is facilitated. And can be performed accurately. Further, when the fin body 6 is brazed to the substrate 5, it is possible to improve the workability of the brazing operation and the thermal efficiency at the time of brazing without requiring a conventional special jig which is a positioning or weight. .

The radiation fins 4 of the present embodiment are made of aluminum or an aluminum alloy, so that the weight can be reduced.

FIG. 8 shows still another modification of the radiating fin according to the present invention. In the radiating fin 4C of this embodiment, a fin body 6C is formed by cladding a brazing material on one surface of a core material made of aluminum in advance. The fin body 6 </ b> C is brazed to the substrate 5. The brazing sheet forming the fin body 6C is obtained by laminating a flat metal plate made of an Al-Si alloy or the like as a brazing material on one side of a flat metal plate made of an aluminum alloy and rolling and hot-pressing the plate. Approximately 5 to 15% of the plate thickness is the thickness of the brazing material. The fin body 6C is formed by using the brazing sheet as a blank 15 and plastically deforming the blank 15 into a zigzag cross section, as in the above-described embodiment. At this time, it is important to form the brazing sheet so that the surface on which the brazing material is located faces the substrate 5. Other configurations are the same as those of the above-described embodiment.

According to the radiating fin 4C of this embodiment having such a configuration, the same effect as that of the radiating fin 4 of the above-described embodiment can be obtained, and when the fin body 6C is brazed to the substrate 5, Also, no special jig is required, and the workability of the brazing operation and the thermal efficiency at the time of brazing can be further improved.

Further, the brazing material of the brazing sheet constituting the fin body 6C is melted at the time of brazing, for example, at the corners of the fitting recesses 7 of the substrate 5 or on the surface located between the fitting recesses 7 of the substrate 5. The accumulation portion 21 of the brazing material, which accumulates at the corners and is exaggerated by being painted black in FIG. 8 and exaggerated, ensures that the substrate 5 and the fin main body 6C are in close contact with each other, and transfers heat from the substrate 5 to the fin main body 6C. It can be smoother.

In FIG. 8, the groove width of the fitting recesses 7a, 7a located at both ends in the left-right direction is considerably larger than the plate thickness of the fin body 6a of the fin body 6C. In the case where a large clearance is formed between the fitting recesses 7a located at both ends in the left-right direction in FIG. 8 and the side wall on the end side of the fitting recesses 7a, a spacer 19 made of, for example, stainless steel indicated by a broken line in FIG. It is preferable to perform the brazing operation with the side surfaces of the fin bodies 6a located at both ends in close contact with the side walls of the fitting recess 7a using only the illustrated). Since the spacer 19 made of stainless steel does not bond with the brazing material, it can be easily removed after the brazing operation is completed. This spacer 19 can naturally be used also when the above-mentioned radiation fins 4, 4A, 4B are manufactured by brazing. Furthermore, the fin body 6C
As a brazing sheet constituting the above, a brazing sheet clad on both sides of a core material made of aluminum may be used.

The present invention is not limited to the above embodiments, but can be modified as needed.

[0086]

As described above, according to the heat radiation fin of the present invention, it is possible to achieve high performance with high precision and downsizing, and according to the method of manufacturing the heat radiation fin of the present invention, An extremely excellent effect that the heat radiation fin of the present invention can be efficiently produced is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic partial perspective view showing the entire configuration of an example of an embodiment of a radiation fin according to the present invention.

FIG. 2 is a partially enlarged perspective view of the substrate of FIG. 1;

FIG. 3 is a partially enlarged cross-sectional view illustrating an arrangement state of a fin body of the fin body in FIG. 1;

FIG. 4 is a block diagram showing an example of an embodiment of a method for manufacturing a radiation fin according to the present invention.

FIG. 5 is an explanatory view showing a fold formed on a blank in a fold forming step of the method for manufacturing a heat radiation fin according to the present invention.

FIG. 6 is a schematic view showing a modified example of the radiation fin according to the present invention when viewed from the upstream side in the flow direction of the cooling fluid.

FIG. 7 is a view similar to FIG. 5, showing another modified example of the radiation fin according to the present invention when viewed from the upstream side in the flow direction of the cooling fluid.

FIG. 8 is a view similar to FIG. 5, showing still another modified example of the radiation fin according to the present invention as viewed from the upstream side in the flow direction of the cooling fluid.

FIG. 9 is a perspective view showing a conventional radiation fin.

FIG. 10 is an explanatory view showing a main part of another example of the conventional radiating fin as viewed from the upstream side in the flow direction of the cooling fluid.

[Explanation of symbols]

 4, 4A, 4B, 4C Radiation fins 5, 5B Substrate 6, 6A, 6B, 6C Fin body 6a Fin body 6b Connecting part 7 Fitting concave part 8 Pointed end 9 Substrate forming step 10 Fin forming step 11 Assembly step 12 Pointing end formation Step 13 Fold forming step 14 Bending step 15 Blank 16 Fold A Cooling fluid flow direction WB (substrate) width dimension LB (substrate) length dimension HB (substrate) height dimension GB (fitting recess) spacing PB Pitch of the fitting recess WF Width of the fin body LF Length of the fin body HF Height of the fin body and the fin body GF Interval of the fin body PF (of the fin body) Pitch GW (fold) interval

Claims (15)

[Claims] 1. A cooling fin having a plurality of fin bodies held on a surface of a substrate, wherein a plurality of fitting recesses extending along a cooling fluid flowing direction on at least one surface of the substrate are formed in a cooling fluid flowing direction. Are formed parallel to each other at a distance in a direction orthogonal to
A plurality of fins which are formed by bending a plurality of metal plates in a zigzag cross section and extending in parallel with each other at an interval via a connecting portion in a direction orthogonal to the plane of each fin; A heat dissipating fin, wherein a bent end portion and a connecting portion of the main body are fitted into fitting recesses of the substrate. 2. The heat dissipating fin according to claim 1, wherein each connecting portion of the fin body fitted into the fitting concave portion of the substrate is formed in the same plane. 3. The space between the plurality of fin bodies of the fin body is formed narrow at both ends in the arrangement direction and wide at the center, and the space between the plurality of fitting recesses of the substrate is set to at least the bent end of the fin body. The heat radiation fin according to claim 1 or 2, wherein one end is formed so as to be fittable. 4. The heat radiation device according to claim 1, wherein at least a part of a fitting portion between the substrate and the fin body is fixed with a joining force of a joining member. fin. 5. The radiating fin according to claim 4, wherein the joining member is a heat conductive adhesive. 6. The radiating fin according to claim 4, wherein the joining member is a brazing material. 7. The fin body according to claim 1, wherein at least one of a leading end and a trailing end of the fin body in the direction of flow of the cooling fluid has a pointed portion for preventing pressure loss.
The heat radiation fin according to any one of claims 1 to 4. 8. The radiation fin according to claim 1, wherein at least the fin body is made of aluminum or an aluminum alloy. 9. A metal material is plastically deformed to form a plurality of fitting recesses extending at least on one surface along a flow direction of the cooling fluid at a distance from each other at a distance in a direction perpendicular to the flow direction of the cooling fluid. Forming a substrate provided in parallel, plastically deforming a substantially flat metal plate to form a plurality of folds extending in parallel with each other at intervals, and forming a zigzag cross section on the metal plate based on the folds. A fin body is formed by integrally forming a plurality of fin bodies which are plastically deformed and extend in parallel with each other at an interval via a connecting portion in a direction perpendicular to the plane of each fin body, and A method for manufacturing a radiating fin, wherein a bent end portion and a connecting portion of the fin body are fitted into the mating recess to integrate the substrate and the fin body. 10. The method according to claim 9, wherein caulking is performed on at least a part of the fitting portion between the substrate and the fin body. 11. The method according to claim 9, wherein at least a part of the fitting portion between the substrate and the fin body is subjected to a joining process using a joining member. 12. The method according to claim 11, wherein a bonding process is performed using a thermally conductive adhesive as the bonding member. 13. The method according to claim 11, wherein a joining process is performed using a brazing material as the joining member. 14. A metal material is plastically deformed to form a plurality of fitting recesses extending at least on one surface along a flow direction of a cooling fluid at a distance in a direction orthogonal to a flow direction of the cooling fluid. A substrate provided in parallel is formed, and a plurality of metal plates having a substantially flat plate shape formed of a brazing sheet in which a brazing material is preliminarily clad on both surfaces or one surface of a core material are plastically deformed and extend parallel to each other at intervals. A plurality of fins that form a fold and are plastically deformed in a zigzag cross section based on the fold to extend in parallel with each other at intervals are connected to each other in a direction perpendicular to the plane of each fin. Forming a fin body integrally formed with the fin body, fitting the bent end portion and the connecting portion of the fin body into the fitting concave portion of the board, and at least a part of a fitting portion between the board and the fin body. Before A method of manufacturing a radiating fin, comprising joining the substrate and the fin body together by joining the fin body with a brazing material previously clad. 15. When forming the fin main body, an edge of the metal plate located at least at one end of a fold formed on the metal plate is plastically deformed to form a leading end of the fin main body in a flow direction of a cooling fluid and The method for manufacturing a radiation fin according to any one of claims 9 to 14, wherein a pointed portion for preventing pressure loss is formed on at least one edge on the rear side.