JP2002299528A - Corrugated fin heat sink manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing device that can manufacture a heat sink in which substrates are provided on and under corrugated fins without brazing. SOLUTION: This manufacturing device manufactures the corrugated fin type heat sink by fixing the sections 70 of the corrugated fins 7 by pressing the sections 70 against fin fixing grooves 80 provided in parallel with each other on a substrate 8. This device is constituted of a plurality of press-fitted blades 1 inserted freely into spaces between the fins 7 in the horizontal directions of the fins 7, and which have heights lower than the lengths (h) of the spaces between the fins 7, support mechanisms 20 and 21 which support the blades 1 in a state where the blades 1 are arranged correspondingly to the fixing sections 70 and one side sections of the blades 1 can be opened freely, and a pressing means 2 which applies vertical pressing forces to the blades 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus for manufacturing a heat sink for cooling a semiconductor device.

[0002]

2. Description of the Related Art There are various types of heat sinks for cooling semiconductor elements. One of them is a type in which a number of plate-like fins are arranged and fixed on a substrate.

[0003] In the basic manufacturing method of this embodiment, plate-like fins are fixed to a substrate by brazing one by one. In order to solve the problem, a plurality of fin portions 12 and fixing portions obtained by appropriately bending and pressing a long plate member as shown in FIG. The corrugated (pleated) fins 14 consisting of 13
A form of fixing on the substrate 15 has been used.

[0004] However, even when the corrugated fins 14 are used, if brazing is performed as a fixing means for the fins 14, a stainless steel holding jig is required, and the holding jig absorbs heat energy to improve thermal efficiency. There is a problem in that the fin portion 12 is lowered or the pressing force deforms the fin portion 12. Therefore, a technique for fixing the corrugated fin to the substrate without the need for brazing has been proposed in Japanese Patent Application Laid-Open No. H10-75078. I have.

In this technique, as shown in FIG. 9, a fin fixing groove 16 is formed in a substrate 15 and a fixing portion 18 of a corrugated fin 14 is pressed and fixed in the groove 16. As shown in the figure, the groove 16 is formed in an expanded taper shape,
The fin fixing portion 18 is fitted therein, expanded by pressing, and pressed into the groove 16.

[0006]

However, Japanese Patent Application Laid-Open No.
In the technique of No. 75078, a press-fitting blade 19 that presses the fin fixing portion 18 from above is used. This is a press-fitting blade that can press from above the fin fixing portion 18 as shown in FIG. The mechanism is considered to be a mechanism in which the blades 19 are arranged in parallel so as to correspond to the respective fin fixing portions 18, and are vertically suspended and supported by the support portion 17 which is movable in the vertical direction. For this reason, the corrugated fins 14
Although it is possible to fix only the substrate 15, it is impossible to fix the substrate 15 on the other side to the form in which the substrate 15 is fixed on one side. Therefore, a fixing method such as brazing has to be applied to the substrate 15 on the other side, and the above problem still remains.

The present invention has been made in view of the above-described problems, and it is possible to manufacture a heat sink having a substrate on both upper and lower sides of a corrugated fin without any brazing. An object of the present invention is to provide a manufacturing apparatus capable of easily manufacturing various types of heat sinks.

[0008]

Therefore, a manufacturing apparatus for manufacturing a corrugated fin type heat sink according to the present invention presses and fixes each fixing portion of a corrugated fin to a fin fixing groove provided in parallel with a substrate. By doing
In a manufacturing apparatus for manufacturing a corrugated fin-type heat sink, a press-fitting blade that can be inserted between the fins from the horizontal direction of the corrugated fin, a plurality of press-fitting blades having a height equal to or less than an inter-fin space length, and A support mechanism arranged in parallel so as to correspond to the fixed portion, and at least one side thereof is freely openable, and a pressing means for applying a pressing force from above and below to each press-fitting blade. Features.

Here, the space between the fins means a space formed between the fins in the corrugated fin type heat sink as a completed product, and the space length is along the height direction of the fins. It means the length (for example, h shown in FIG. 1 (d)).

[0010] In the present invention, the press-fitting blade has a height equal to or less than the inter-fin space length, and at least one side is supported to be freely openable. If the corrugated fins are moved along the horizontal direction from the opened one side so that each press-fitting blade is inserted between the fins, each press-fitting blade corresponds to the fin fixing portion. Corrugated fins are mounted on the press-fitting blades in a state where the press-fitting blades are arranged between the fins. In this state, the substrate to be fixed is disposed on one or both of the upper and lower fixing portions of the corrugated fin, and a pressing force is applied to the press-fitting blade by the pressing means. As a result, the fin fixing part is fixed to the substrate. As described above, since the corrugated fin moves from the horizontal direction with respect to the press-fitting blade, and then the pressing force is applied,
Even if the substrate is already fixed to one of the upper and lower fixing portions of the corrugated fin, the substrate can be fixed to the other fixing portion. Of course, if the substrate is placed on both the upper and lower fin fixing portions after being moved in the horizontal direction and pressed, the upper and lower fin fixing portions can be simultaneously fixed in one process. In any case, a heat sink in which the substrate is provided on both the upper and lower sides of the corrugated fin can be manufactured only by applying the pressing force without any brazing.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings. Note that the following embodiments are merely examples, and it is obvious that the invention according to the present application is not limited to the following embodiments. That is, means equivalent to or replaceable with the respective means in the following embodiments are naturally included in the configuration of the invention according to the present application.

FIG. 1 shows a first embodiment of an apparatus for manufacturing a corrugated fin heat sink.

This apparatus comprises a plurality of press-fitting blades 1 and each press-fitting blade 1
And a fixed clamp 3. While each press-fitting blade 1 is arranged in parallel so that the height of the half of the inter-fin space length h of the heat sink to be manufactured corresponds to each fin fixing portion 70 of the corrugated fin 7 to be fixed, Both ends are supported by a support body 20 described later. The movable frame 2 is provided with the corrugated fins 7 in the center of the frame by the supports 20 erected on both ends and the connecting body 21 connecting the supports 20 by bridging the upper ends thereof. It has a gate shape in which an extra space 22 is formed. Both supports 20
Supports the side end of the press-fitting blade 1 at each lower end side, but one side can be freely opened because it is necessary to slide the corrugated fin 7 fixing part to each press-fitting blade 1 from the horizontal direction. It is necessary to take a form. For this reason, in the present embodiment, the other side of the support body 20 is fixed to the connection body 21 at the upper contact portion, but the one side is detachably fixed to the connection body 21. The support form of each press-fitting blade 1 on the one-side support 20 is also detachable. In addition, one side support 20 or press-fit blade 1
The respective attachment / detachment mechanisms may be formed by appropriately using known means such as hinges and screws.

An example of the use of this device is the corrugated fin 7
Next, an example in which a new substrate 8a is fixed to the other side while the substrate 8b is already fixed to the upper and lower sides will be described. While the substrate 8a is placed on the fixed clamp 3, the fixing of each press-fitting blade 1 to the detachable one-side support 20 is released, and the press-fitting blade 1 is detached from the connecting body 21, and the corrugated fins 7 are respectively fixed from the detached side. Sliding in the horizontal direction so that each press-fitting blade 1 is inserted into the part 70, so that the entire corrugated fin 7 enters the portal space 22,
After being attached to the press-fitting blade 1, the detached support 20 is connected to the connecting body 2.
1 and fix the opened end of each press-fitting blade 1 again. In this state, when the movable frame 2 is lowered, the press-fitting blades inserted into each fin fixing part 70 from the horizontal direction
1 also goes down (FIGS. 1 (a) and 1 (b)), whereby each fin fixing portion 70 fits into the groove 80 of the substrate 8a, and is further pressed to fix the corrugated fin 7 to the substrate 8a. ((C) in the same figure). After the fixing, the movable frame 2 is slightly raised to release the pressed state, and then, the detachable support 20 is removed again.
When the support 20 is detached from the press-fitting blade 1 on the side and the corrugated fin 7 fixed thereto is slid horizontally and taken out, the substrates 8a, 8
As a result, a heat sink to which b is fixed is obtained (FIG. 3D).

Next, FIGS. 2 and 3 show a second embodiment of an apparatus for manufacturing a corrugated fin heat sink.

The apparatus comprises a plurality of press-fitting blades 1 and each press-fitting blade 1
It is composed of a fixed / pressing cylinder 4 for supporting the frame and a fixed frame 5. Each press-fitting blade 1 is the same as that of the first embodiment, and is arranged in parallel so as to correspond to each fin fixing portion of the corrugated fin 7 to be fixed, while being pressed by a gripping portion 42 of a fixing cylinder 4a described later. One end is supported. The fixed frame 5 is composed of an upper plate 50 serving as a cylinder fixing plate, a lower plate 51 serving as a clamp, and four corner posts 52 connecting the upper and lower plates 50 and 51. Corrugated fins are provided between the upper and lower plates 50 and 51. An extra space 53 in which 7 can be sufficiently arranged is formed. Each of the cylinders 4 includes an upper plate 5 for each casing 40.
The rods 41 are fixed substantially along the center of 0 and at a predetermined distance from each other, and at that position, the rods 41 expand and contract in the vertical direction. Rod 41 of one fixing cylinder 4a
aGrip portion 42 grips one end of each press-fitting blade 1 at the tip.
However, at the tip of the rod 41b of the other pressing cylinder 4b, there is provided a pressing portion 43 which can abut on the other end of each press-fitting blade 1 respectively. Therefore, as shown in the drawing, each press-fitting blade 1 has one side end supported in parallel by being gripped by the gripping part 42 of the cylinder 4a, and the other side end thereof is formed by the reducing operation of the rod 41b of the pressing cylinder 4b. It becomes open.

Next, an example of use of this embodiment will be described with reference to FIG. As in the case of the first embodiment, this is a case where a substrate 8b on one side is fixed and a new substrate 8a is fixed on the other side. While supporting one end of each press-fitting blade 1 in a cantilever manner with the gripping portion 42 at the tip of the fixing cylinder rod 41a, the pressing cylinder rod 41b is reduced, and the other end of each press-fitting blade 1 is opened. In this state, open the corrugated fin from the open side.
7 is horizontally slid so that each press-fitting blade 1 is inserted into each fixing portion 70, and the entire corrugated fin 7 is moved to a position up to the intermediate portion between both cylinders 4a and 4b.
At this time, the substrate 8b is placed on the lower plate 51 (see FIG.
(a)). In this state, the pressing cylinder rod 41b is lowered, and when the pressing portion 43 comes into contact with the upper end of the other side of each press-fitting blade 1, the fixing cylinder rod 41a is synchronized with the pressing cylinder rod 41a simultaneously with the contact. And lower it (FIG. 6 (b)). When the cylinder rods 41a and 41b are lowered, the press-fitting blades 1 supported by the cylinder rods 41a and 41b are also lowered, whereby the corrugated fins 7 are also lowered. Substrate 8a mounted on lower plate 51
The corrugated fin 7 is lowered until it comes into contact with the cylinder rods 41a and 41b.
The press-fitting blade 1 descends to the bottom in the fixed part 70 of the corrugated fin 7, and then presses the fixed part 70 to lower it. Thereby, the fin fixing portion 70 is inserted into the groove of the substrate 8a.
The corrugated fins 7 are further pressed to fix the corrugated fins 7 on the substrate 8b (FIG. 3 (c)). After fixation, both cylinder rods 41a, 41b are slightly reduced to eliminate the pressing state, and then only rod 41b of pressing cylinder 4b is reduced,
If the other end of each press-fitting blade 1 is in an open state and the fixed corrugated fin 7 is slid in the horizontal direction and taken out therefrom, a heat sink to which the substrates 8a and 8b are fixed on both the upper and lower sides can be obtained. become.

The first and second embodiments use the case where the substrate 8b is already fixed to one of the upper and lower sides of the corrugated fin 7, but the substrate 8b
Needless to say, the fixing can be performed by the same steps as described above.

Next, FIG. 4 shows a third embodiment of an apparatus for manufacturing a corrugated fin type heat sink.

The apparatus includes a plurality of press-fitting blades 10 and each press-fitting blade.
The fixing and pressing cylinders 4 supporting the cylinder 10 and the stationary frame 5 are constituent elements, and the basic configuration and operation thereof are almost the same as those of the second embodiment, but the height of each press-fitting blade 10 is high. Is approximately the same length as the inter-fin space length h, and the arrangement of each press-fitting blade 10 is made to be relatively uneven at the upper and lower ends similarly to the pressing die 11, which will be described later.
A difference is that a second pressing cylinder 4c is disposed substantially at the center between the pressing cylinder 4a and the pressing cylinder 4b, and the rod 41c of the cylinder 4c is configured to extend and contract independently. At the tip of the rod 41c of the second pressing cylinder 4c, there is provided a grip portion 44 which can grip and support the substrate 8a. For this reason, as shown in FIG. 5 showing the operation state, for example, after the one-side (lower) substrate of the corrugated fin is fixed by the pressing action of the press-fitting blade 10 by the fixing cylinder 4a and the pressing cylinder 4b. (FIGS. 9A to 9C. The steps so far are exactly the same as those in the second embodiment.) The gripping portion 44 of the second pressing cylinder 4c grips the substrate 8a, and the rod 41c is moved. Is lowered to apply a pressing force from the substrate 8a to the corrugated fin 7 fixing portion side, so that the substrate on one end side (lower side) is
After the attachment of the substrate 8b, the substrate 8a on the other end side (upper side) can be attached (FIG. 4D). Needless to say, the process shown in FIG. 5 may be performed in a single process, and the substrates 8a and 8b above and below the corrugated fin 7 may be simultaneously fixed without dividing the application of the pressing force into multiple stages. In any case, corrugated fin 7
The substrates 8a and 8b can be fixed to both ends of the substrate in a series of steps. The grip portion 44 at the tip of the rod 41c is not particularly structured to grip the substrate 8a as long as it can fix the substrate 8a, and may be replaced by a known supportable means. No special provision is made, for example, after directly mounting the substrate 8a on the fin fixing portion 70,
A structure in which the pressing force is applied by lowering 41c may be used.

In these embodiments, the press-fitting blade supporting members (movable frame 2 and cylinder 4) move up and down with respect to the fixed base (clamp 3, lower plate 51), so that the press-fitting is possible. Although the pressing action of the blades 1 and 10 is generated, for example, the support members on the upper side are fixed, and the base side (the clamp 3, the lower plate 5
Either a configuration in which 1) is movable in the vertical direction or a configuration in which both the upper side and the base side are movable may be used. Further, the spaces 22 and 5 of the movable frame 2 and the fixed frame 5 are provided.
If 3 is made larger, as shown in FIG.
The same figure also shows the form in which the corrugated fins 7 are layered.
It can be manufactured in the order of the manufacturing steps (a) and (b) (in the figure,
8c is a connection substrate).

Next, FIG. 6 shows a fourth embodiment of an apparatus for manufacturing a corrugated fin type heat sink.

This device has a pressing die 11 whose upper and lower ends are uneven.
And an upper press clamp 6a movable on the upper side of the apparatus and a lower press clamp 6b movable on the lower side of the apparatus. As shown in FIG. 5E, each of the pressing dies 11 is provided with a fin portion 71 of the corrugated fin 7 to be fixed, as shown in FIG. A slit 13 into which 71) in () can be inserted is formed from one end surface side to a position just before the other end surface side. Then, the portion between the slits 13 corresponds to each fin fixing portion (7 in FIG.
0) is a press-fitting blade 12 as a press-fitting means,
In such a pressing die 11, since each press-fitting blade 12 formed by the slit 13 is open at one end face side and integrated at the end face side, the press-fitting blade 12 is integrated at the other end face side. The press-fit blades 12 serving as the press-fit blades are supported. In addition, between the adjacent press-fitting blades 12, if one upper end is the convex portion 12a and the lower end is the concave portion 12b, the adjacent upper end is the concave portion 12b and the lower end is the convex portion 12a.
As a whole, relative irregularities are formed at the upper and lower ends of the entire structure. In addition, the uneven shape conforms to the shape of the substrate 8a, 8b surface to which the corrugated fin 7 is to be fixed, that is, the concave portion is
The projections are in contact with the surfaces a and 8b, and the projections are fitted into the grooves (80 in FIG. 8B) of the substrate 8 via the fin fixing portions. Each press-fitting blade 12 has substantially the same height as the inter-fin space length h. Accordingly, the press-fitting blades 12 formed by these shapes of the pressing die 11, that is, the slits 13 and the unevenness of the upper and lower ends are arranged in parallel so as to correspond to the respective fixing portions of the corrugated fins 7 to be fixed. It becomes a form supported by. The upper press clamp 6a and the lower press clamp 6b are both movably arranged in the vertical direction.

An example of the use of this device is the corrugated fin 7
The following describes an example in which the substrates 8a and 8b are fixed to both upper and lower ends in one step. Substrate on lower press clamp 6b
8b, while one end of the pressing die 11
The press-fitting blades 12 are inserted horizontally between the fin portions 71 by moving the corrugated fins 7 in the horizontal direction so that the fin portions 71 are fitted into the corrugated fins 7.
The fins 7 are arranged on the substrate 8b such that the fin lower fixing portions 70 of FIG. 7 are fitted into the respective grooves 80 of the substrate 8b. At the same time, each groove 80 of the substrate 8a is
The substrate 8a is arranged on the fin 7 so as to be fitted into the fin 7 (FIGS. 6A and 6B). In this state, press the upper and lower press clamps 6
a, 6b are respectively moved, and the corrugated fin 7 and the substrate 8a,
When the substrate 8a is pressed while sandwiching it with the pressing die 11 (each press-fitting blade 12), the substrates 8a and 8b are fixed to both the upper and lower ends of the corrugated fin 7 (FIGS. (C) and (d)). Thereafter, the upper and lower press clamps 6a and 6b are separated from each other to release the pressed state, and the pressing die 1
If 1 is moved in the horizontal direction and removed from the corrugated fin 7, a heat sink having the substrates 8a and 8b on both the upper and lower sides of the corrugated fin 7 is obtained (the same as FIG. 1D).

In this embodiment, the upper and lower clamps 6
By moving both a and 6b in the vertical direction, the pressing die 11
The pressing action via the (press-fitting blade 12) is generated. Needless to say, as in the first embodiment and the like, one of them may be fixed and only the other may be movable. Also, as shown in FIG. 7 (c), when the corrugated fins 7 are stacked,
In this embodiment, if the pressing dies 11 are attached to the
It can be manufactured in the process (the manufacturing process in FIG. 2B is omitted).

[0026]

As described above, according to the heat sink manufacturing apparatus of the present invention, even if the heat sink has a configuration in which the substrate is provided on both the upper and lower sides of the corrugated fin, the heat sink can be manufactured without any brazing. Becomes

[0027] Also, the form in which the corrugated fins are multi-layered can be manufactured in a very simple manner, and it is possible to easily manufacture corrugated fin-type heat sinks in various forms as compared with the related art. .

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory diagrams showing a use state of a first embodiment example, where FIG. 1A is a state at the start of a fixing step, FIG. 1B is a cross-sectional view taken along the line XX of FIG. A sectional view taken along the line XX, (d) shows an end view of the completed heat sink.

FIG. 2 is an explanatory diagram showing a configuration of a second embodiment,
(a) is a front view, (b) is a right side view, (c) is a left side view, (d) is a plan view, and (e) is a sectional view taken along line XX of (a).

FIGS. 3A and 3B are explanatory diagrams showing a use state of the second embodiment example, wherein FIG. 3A shows a state in which a corrugated fin is mounted on a press-fitting blade, FIG. 3B shows a state in which the corrugated fin is lowered, and FIG. Each state in which the corrugated fin is fixed to the substrate is shown.

FIG. 4 is an explanatory diagram showing a configuration of a third embodiment;
(a) is a front view, (b) is a right side view, (c) is a left side view, (d) is a plan view, and (e) is a sectional view taken along line XX of (a).

FIGS. 5A and 5B are explanatory diagrams showing a use state of the third embodiment example, where FIG. 5A shows a state where corrugated fins are mounted on a press-fitting blade, FIG. 5B shows a state where corrugated fins are lowered, and FIG. The lower substrate is fixed to the corrugated fin, (d) is the upper substrate fixed to the corrugated fin, (e)
Is a sectional view taken along the line XX of (a), (f) is a sectional view taken along the line XX of (c), and (g) is a sectional view.
(d) is a sectional view taken along line XX.

FIGS. 6A and 6B are explanatory views showing a use state of the fourth embodiment example, wherein FIG. 6A is a state at the start of a fixing step, FIG. 6B is a cross-sectional view taken along the line XX of FIG. A cross-sectional view taken along line XX, (d) is an enlarged view of a portion A in (c), and (e) is a perspective view of a pressing type.

7A and 7B show a manufacturing process of one embodiment that can be manufactured by the manufacturing apparatus according to the present application, wherein FIG. 7A is a state diagram before being fixed, FIG. 7B is a state diagram where a lower substrate is fixed, and FIG. () Shows state diagrams in which the upper substrate is fixed.

FIG. 8 is an explanatory view showing a conventional corrugated fin type heat sink.

FIGS. 9A and 9B are explanatory diagrams of a heat sink manufacturing technique disclosed in Japanese Patent Application Laid-Open No. H10-75078, wherein FIG.
(b) shows the state after fixing.

FIGS. 10A and 10B are explanatory diagrams for anticipating an apparatus used in the manufacturing technique disclosed in FIG. 8, in which FIG.
Indicates the heat sink after fixing.

[Explanation of symbols]

 1,10,11 Press-fitting blade 2 Movable frame 3 Fixed clamp 4 Cylinder 5 Fixed frame 6 Press clamp 7 Corrugated fin 8 Substrate 22,53 Space

Claims (1)

[Claims] 1. A manufacturing apparatus for manufacturing a corrugated fin type heat sink by pressing and fixing each fixing portion of a corrugated fin to a fin fixing groove provided in parallel with a substrate, thereby forming a fin from a horizontal direction of the corrugated fin. A press-fitting blade that can be inserted into the interspace, a plurality of press-fitting blades having a height equal to or less than the inter-fin space length, and the press-fitting blades are arranged in parallel so as to correspond to the fixed portion, and at least one side thereof. A corrugated fin type heat sink manufacturing apparatus, comprising: a support mechanism for freely opening a portion; and pressing means for applying a pressing force from above and below to each press-fitting blade.