JPH06198383A - Heat radiation plate and its production - Google Patents

Abstract

PURPOSE:To provide the heat radiation plate which hardly generates resonance and is suitable for automation. CONSTITUTION:A base 10 is formed with plural grooves 12 in parallel and fins 14 consisting of a blank material consisting of pure aluminum, etc., which are formed with engaging parts 16 consisting of recessed parts or projecting parts and having relatively low hardness are partly fitted into these groove. Pressurizing force is perpendicularly applied near the grooves 12 of the base 10 to form press-deformed parts 17 on the base 10. The fins 14 are partly fixed to the wall surfaces of the grooves 12 of the base 10 by the pressurized contact force of the press-deformed parts 17 on the fins 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio device and a computer.
The present invention relates to a heat radiating plate used for radiating heat with respect to temperature rise of a semiconductor and a semiconductor substrate, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, a heat radiating plate using fins has been used as a member for radiating heat generated in audio equipment, computers, semiconductor substrates and the like. As shown in FIG. 22, these conventional heat sinks are extruded by a die as shown in FIG.
As shown in FIG. 5, the fin itself is bent into a U shape, and the bent fin 4 is fixed to the base 6 by boss caulking 8
There are bent bosses and crimp fins.

The extruding fin 2 molded by die pressing as shown in FIG. 22 is formed by injecting a material into a die and extruding it. Therefore, the material to be used requires a certain hardness, and an alloy with hardness 37 is usually used.
This is because the fins themselves are distorted when using a material having a high degree of softness for molding, which is an embossing process, and the hardness of the material itself is an unavoidable problem in the molding process.

[0004]

Looking at these prior arts, first of all, in the case of the extrusion fin, the die used for its production is expensive, and it is necessary to remodel and produce the die each time the dimension and shape are changed. It was extremely time consuming and costly. In addition, it takes a lot of man-hours to set up the processing, and even if it is manufactured, a material loss occurs, so that a small amount of production becomes very expensive. For this reason, the extrusion process is generally expected to produce a considerable amount at a time, but if the design was changed or the production was stopped before the digestion, it would be a great loss.

Further, in the case of the extruding fin, the material is generally an alloy to improve the extruding property, so that the hardness is high. When used in an audio device, etc., first, resonance is easily generated in a high frequency range. Secondly, pure aluminum is used. Compared with this, there was a problem that the thermal conductivity was low and the heat dissipation was poor. Further, since the fins cannot be made thin or high by the molding means, and the fins cannot be changed individually, it is possible to satisfy the demands of the heat dissipation plate utilization industry, in particular, audio equipment. I couldn't say I was there.

Next, even in the method of fixing the fins by caulking, it is necessary to bend the fins themselves.
It is difficult to reduce the pitch of the fins because it requires mold cost, and because a so-called bite occurs when aligning the fins after U-shaped bending, it is difficult to reduce the pitch of the fins because a certain space is required to occupy the bosses. It was difficult to insert the into the boss, so automation could not be done. Furthermore, it is difficult to ensure that the fin bottom surface and the base surface are in close contact with each other by the boss caulking connection, and it is possible that the metal contact can be ensured only at the very periphery of the boss, and other parts are likely to be separated, and the heat dissipation characteristics This method also has major drawbacks due to the decrease and instability.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a heat dissipation plate in which a plurality of plate-shaped fins are provided upright on a base in a direction perpendicular to the surface of the base. Provided, a part of the fin is fitted in the groove, a pressing deformation part is provided in the vicinity of the groove of the base, and a part of the fin is crimped to the wall surface of the groove by the pressure of the pressing deformation part. Is.

[0008]

The pitch of the fins can be reduced, and the fins made of pure aluminum or the like having a relatively low hardness can be surely joined to the base.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. 1 to 5, 1
Reference numeral 0 is a base of a heat radiating plate made of a material that has a heat radiating effect and is hard to resonate, such as pure aluminum, in which grooves 12 are formed at a constant pitch. Reference numeral 14 is a fin made of a material such as a thin plate of pure aluminum that has a heat dissipation effect and is hard to resonate. On both sides of a lower portion of the fin, engaging portions 14 that are concave portions are formed to prevent the groove 12 from coming off. Has been done.

The lower portion of the fin 14 is fitted in the groove 12, and the lower portion of the fin 14 is firmly fixed to the wall surface of the groove 12 by the pressing deformation portion 17 formed in the vicinity of the groove 12. The engaging portion 16 is not particularly limited to the structure formed on both sides of the lower portion of the fin 14, and may be provided on only one side as shown in FIG. 6, or may not be provided in some cases. Further, the engaging portion 16 may be formed by a convex portion as shown in FIG. In addition, the pressing deformation part 1
The structure 7 is not particularly limited to the structure formed on both sides of the groove 12, and may be formed on one side of the groove 12.
Next, a method of manufacturing the heat dissipation plate will be described step by step.

[0011]

[Base Groove Forming Process] FIGS.
The process of forming the groove 12 is shown. Reference numeral 18 is a mounting table, and 20 is a pressing die. The pressing die 20 is configured to be connected to an elevating and lowering drive device and move on the mounting table 18 at a constant pitch. In the above configuration, the base 10 is fixed on the mounting table 18, and the pressing die 20 presses the base 10 with a constant pitch, whereby the grooves 12 are formed in the base 10 at a constant pitch. . The method of forming the groove 12 in the base 10 is as follows.
In addition to the above embossing, cutting with a milling cutter etc. is also possible.

[0012]

[Fin Engagement Part Forming Step] Next, the step of forming the engagement part 16 for preventing slipping out at the bottom of the fin 14 will be described with reference to FIGS.
Will be described with reference to. A pair of groove processing rollers 24 and 26 are rotatably supported on the mounting table 22. Further mounting table 2
In the strip-shaped fin material moving path on 2, the feed roller 2
8, 30 and shear cutter 32 are provided. A fin floating presser 36 is fixed to a bracket 34 standing on the mounting table 22, and fin fall prevention guide rollers 38 and 40 are rotatably supported by the presser 36. A roll portion 42a of a strip-shaped fin material 42 is rotatably supported on the mounting table 22, and the fin material 42 is rolled into a roll portion 42a.
And is fed from the groove processing rollers 24 and 26 by the driving force of the feed rollers 28 and 30.

At this time, the grooved roller 2 is formed on the fin material 42.
A concave engagement portion 16 is formed by 4, 26. The fin material 42 on which the engaging portions 16 are formed is cut into a fin by the shear cutter 32 to have a predetermined length. 15 and 16 show another embodiment of the engaging portion forming step. Upper push die 44 connected to the lifting drive device
And the lower pressing die 48 provided on the mounting table 46 presses the pure aluminum fin 14 to form the engaging portions 16 and 16 formed of concave portions in the fin 14. The fins 14 may be formed with the engaging portions 16 and 16 that are convex portions by a rolling technique.

[0014]

[Step of fixing the fins to the groove of the base] Next, the base 1
A process of fixing the lower portion of the fin 14 to the groove 12 of 0 will be described. 17 to 19, reference numeral 50 denotes a mounting table, which is a positioning plate 52 that regulates both ends of the base 10.
54 is fixed. Reference numeral 56 denotes an elevating body, and a shaft body 58 fixed to the elevating body is connected to an output shaft of an elevating drive device supported by a machine body (not shown). The lifting body 56 is
It is supported so that it can move in a direction parallel to the positioning plate 52 with respect to the mounting table 50. Lifting body 5
A horizontal hole 60 is formed in the center of the holder 6, and the holder 6
2 are arranged so that they can be raised and lowered.

A holding plate 64 is fixed to the holder 62. The holder 62 is biased downward by a coil spring 66 arranged in the lateral hole 60, and the biasing force causes the holder 62 to elastically contact the upper surface of the bottom member 68 of the elevating body 56. An upper portion of a plate-shaped pressing body 70 is fixed to the bottom member 68 of the elevating body 56.
A slit 72 is formed inside the pressing body 70,
The holding plate 64 is inserted and arranged in the slit groove 72. At the lower end of the pressing body 70, a tapered pressing blade 74 is formed.

In the above structure, the base 10 is placed on the mounting table 50 with the elevating body 56 being raised to a predetermined position.
To position. Next, the pressing body 70 is moved right above the groove 12 of the desired base 10. Next, the lower portion of the fin 14 is inserted into the selected groove 12 from the horizontal direction using the slit 72 of the pressing body 70 as a guide. Next, the lifting / lowering body 56 is lowered, and the pressing blade 74 presses the vicinity of the groove 12 in which the lower part of the fin 10 is inserted, and the groove 12 of the base 10 is pressed.
The pressing deformation portion 17 is formed in the vicinity of. As a result, the lower portion of the fin 14 is firmly fixed to the wall surface of the groove 12 of the base 10.

When the lifting / lowering body 56 descends, the pressing plate 64
Is pressed against the upper ends of the fins 14 by the elastic force of the coil springs 66, and prevents the fins 14 from floating. Fin 1
After fixing 4 to the groove 12, the lifting / lowering body 56 is lifted, the lifting / lowering body 56 is removed from the fins 14, and then the next groove 1
The pressing body 70 is moved above 2 and the fin 14 is fixed to the next groove 12 in the above-described manner. In this way, the fins 14 are sequentially erected on the base 10.

In the above-mentioned embodiment, the pressing deformation portions 17 are formed on both sides of the groove 12 of the base 10 to firmly fix the lower portion of the fin 14 to the wall surface of the groove 12 of the base 10. As shown in FIG. 20, a disk-shaped pressing body 82 is rotatably supported by a holder-84 which is vertically movable and movable in a linear direction and a direction perpendicular to the linear direction. It is also possible to press one side of the groove of the base 10 with a blade to form a pressing deformed portion on one side of the groove of the base 10 and to sequentially install the fins 14 on the base 10.

Further, as shown in FIG. 21, a pressing body 86 having a width substantially the same as the groove 12 is supported by a holder which can be moved up and down and movable in the pitch direction, and the pressing blade of the pressing body 86 is supported. Press one side of the groove 12 of the base 10 with the base 1
A pressure deforming portion is formed on one side of the groove of 0, and by this,
The fins 14 may be sequentially erected on the base 10. With the above configuration, the pitch of the fins 14 can be made smaller.

FIGS. 8, 9, and 10 show another embodiment of the heat sink. In the method of inserting the fins 14 into the base 10 as described above, it is not necessary to make the fins uniform in shape as in the conventional case, and it is possible to form the fins 14 one by one in a mountain shape as shown in FIG. Therefore, it is possible to elaborate on the design in the case where the radiator plate is designed to project to the outside especially in the acoustic relation.

FIG. 9 shows a heat radiating plate when the short fins 14 are provided in the longitudinal direction between the fins 14.
In the heat radiating plate, setting and releasing can be easily performed by providing a fixing screw hole 76 at the short fin 14. In FIG. 10, fixing members 78 and 80 projecting from the base 10 are provided. Unlike the case of the conventional die extrusion, the heat dissipation plate as shown in FIG. 10 can be easily manufactured. The base 10 is not limited to a flat plate member, but may be a curved plate member.

[0020]

[Effect] The present invention implemented by the above-described structure is
It is a system that can secure a production system that can respond immediately to model changes, design changes, mass production launches, etc. This makes it possible to support small-volume production and various shapes. Above all, even if the fin is made of a material with low hardness such as pure aluminum, the fin pitch can be made small, and the joint between the base and the fin has a close contact, which results in high heat dissipation and resonance phenomenon. The avoidance of can be obtained. Further, there is an effect that the production of the heat sink can be automated.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a heat dissipation plate.

FIG. 2 is an external view of a heat sink.

FIG. 3 is a side view of a heat sink.

FIG. 4 is an external view of a base.

FIG. 5 is an external view of a fin.

FIG. 6 is a cross-sectional view of the main parts showing another embodiment of the heat dissipation plate.

FIG. 7 is a cross-sectional view of essential parts showing another embodiment of the fin.

FIG. 8 is an external view showing another embodiment of the heat dissipation plate.

FIG. 9 is an external view showing another embodiment of the heat dissipation plate.

FIG. 10 is an external view showing another embodiment of the heat dissipation plate.

FIG. 11 is an external view showing a step of forming a groove in the base.

FIG. 12 is a side view showing a step of forming a groove in the base.

FIG. 13 is a side view showing a step of forming an engagement recess on the fin.

FIG. 14 is an external view showing a step of forming an engagement recess in a fin.

FIG. 15 is an external view showing another embodiment of the process of forming the engaging recesses on the fins.

FIG. 16 is a side view showing another embodiment of the step of forming the engagement recesses on the fins.

FIG. 17 is a side view showing a step of fixing fins to the base.

FIG. 18 is an enlarged side view of essential parts showing a step of fixing fins to the base.

FIG. 19 is a partially cutaway external view showing a step of fixing fins to the base.

FIG. 20 is a partially cutaway sectional view showing another embodiment of the step of fixing the fins to the base.

FIG. 21 is a partially cutaway sectional view showing another embodiment of the step of fixing the fins to the base.

FIG. 22 is an external view of a conventional technique.

FIG. 23 is an external view of a conventional technique.

FIG. 24 is a front sectional view of a conventional technique.

FIG. 25 is a side sectional view of the prior art.

[Explanation of symbols]

 2 fins 4 fins 6 bases 8 bosses 10 bases 12 grooves 14 fins 16 engaging recesses 17 pressing deformation parts 18 mounting tables 20 push molds 22 mounting tables 24 grooved rollers 26 grooved rollers 28 feed rollers 30 feed rollers 32 shear cutters 34 brackets 36 Floating Presser 38 Guide Roller 40 Guide Roller 42 Fin Material 44 Pushing Type 46 Placing Table 48 Pushing Type 50 Placing Table 52 Positioning Plate 54 Positioning Plate 56 Elevating Body 58 Shaft Body 60 Side Hole 62 Holder 64 Holding Plate 66 Coil Spring 68 Bottom Member 70 Pressing body 72 Slit 74 Pressing blade 76 Screw hole 78 Fixing member 80 Fixing member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunimoto Yokozuka 199-2 Ueda, Higashimura, Sawa-gun, Gunma Prefecture (72) Inventor Masayoshi Hayami 1-9-18 Seta, Setagaya-ku, Tokyo

Claims (8)

[Claims] 1. A heat dissipation plate in which a plurality of plate-shaped fins are erected perpendicularly to the surface of a base, a groove is provided in the base, and a part of the fin is fitted in the groove, A heat radiating plate characterized in that a pressing deforming portion is provided in the vicinity of the groove of the base, and a part of the fin is pressed against the wall surface of the groove by the pressure of the pressing deforming portion. 2. The heat dissipation plate according to claim 1, wherein an engaging portion is provided on a part of the fin, and the pressing deformation portion is press-fitted into the engaging portion. 3. The heat dissipation plate according to claim 1, wherein the engaging portion is a recess. 4. The heat dissipation plate according to claim 1, wherein the engaging portion is a convex portion. 5. The heat radiating plate according to claim 1, wherein the pressing and deforming portions are provided on both sides of the groove of the base. 6. The heat dissipation plate according to claim 1, wherein the pressing deforming portion is provided on one side of the groove of the base. 7. A step of linearly forming a groove in the plane of the base, a step of fitting a part of the fin into the groove, and a pressing body to make the vicinity of the groove perpendicular to the plane of the base. And a step of compressing and deforming the groove from the side by the pressing force. 8. The method of manufacturing a heat dissipation plate according to claim 7, further comprising the step of forming an engaging portion on a part of the fin.