JPH11290968A - Formation of heat radiator - Google Patents
Formation of heat radiatorInfo
- Publication number
- JPH11290968A JPH11290968A JP10121728A JP12172898A JPH11290968A JP H11290968 A JPH11290968 A JP H11290968A JP 10121728 A JP10121728 A JP 10121728A JP 12172898 A JP12172898 A JP 12172898A JP H11290968 A JPH11290968 A JP H11290968A
- Authority
- JP
- Japan
- Prior art keywords
- metal plate
- radiator
- pressing
- heat radiation
- cylindrical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/022—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being wires or pins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/063—Friction heat forging
- B21J5/066—Flow drilling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/367—Cooling facilitated by shape of device
- H01L23/3672—Foil-like cooling fins or heat sinks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
- F28D2021/0029—Heat sinks
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、発熱を伴う電子部
品等の近傍に設けられ、電子部品等から生ずる熱を効率
的に放熱するための放熱器に関するものであり、詳しく
は筒状の放熱フィンを備えた放熱器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator provided near an electronic component or the like that generates heat to efficiently radiate heat generated from the electronic component or the like. The present invention relates to a radiator provided with fins.
【０００２】[0002]
【従来の技術】パワートランジスタやＣＰＵに代表され
る集積回路等の電子部品は、その作動に伴って自ら熱を
生じる。この熱が充分に放熱されないと、能力が低下し
て効率ロスや誤動作を招来する虞れがある。そこで、こ
のような電子部品の放熱を効率的に行うために、図５に
示すように、回路基板６に搭載した発熱素子７の一部を
放熱器１０に当接させて放熱効果を高める技術が一般に
知られている。この放熱器１０は、アルミニウム等の熱
伝導性に優れた金属材料を、予め所定の形状に形成され
た金型を用いて鋳造や鍛造もしくは押出し成形等の加工
を施すことより、断面が櫛歯状を呈するように形成され
ている。すなわち、平板状の基部１１からほぼ垂直方向
に突出する複数の放熱フィン１２が互いに略平行に列設
されて放熱器１０が構成されている。2. Description of the Related Art Electronic components such as integrated circuits typified by power transistors and CPUs generate heat by themselves when operated. If this heat is not sufficiently dissipated, there is a possibility that the performance is reduced and efficiency loss or malfunction occurs. Therefore, in order to efficiently dissipate the heat of such electronic components, as shown in FIG. 5, a technique for improving the heat dissipating effect by contacting a part of the heat generating element 7 mounted on the circuit board 6 with the heat dissipator 10. Is generally known. The radiator 10 is formed by casting, forging, or extruding a metal material having excellent thermal conductivity, such as aluminum, using a mold formed in a predetermined shape in advance. It is formed so as to have a shape. That is, the radiator 10 is configured by arranging a plurality of radiating fins 12 projecting in a substantially vertical direction from the flat base 11 in substantially parallel to each other.
【０００３】[0003]
【発明が解決しようとする課題】放熱器の放熱効果は放
熱器全体の表面積にほぼ比例するので、図５に示すよう
な放熱器１０の放熱効果を高めるためには、放熱フィン
１２の数を増やして配列間隔を狭くしたり、あるいはま
た、放熱フィン１２の表面に凹凸部を設けたりする工夫
が施されている。しかしながら、放熱フィン１２の数を
増やして配列間隔を狭くしたり、表面形状に工夫を凝ら
すと、金型の形状が複雑になり製造コストが高騰してし
まうという問題がある。Since the heat radiation effect of the radiator is substantially proportional to the surface area of the entire radiator, in order to enhance the heat radiation effect of the radiator 10 as shown in FIG. The arrangement interval is narrowed by increasing the number, or a concavo-convex portion is provided on the surface of the radiation fin 12. However, if the number of the radiation fins 12 is increased to reduce the arrangement interval or the surface shape is devised, there is a problem that the shape of the mold becomes complicated and the manufacturing cost increases.
【０００４】また、上記放熱器１０は、平板状の基部１
１に対して垂直に板状の放熱フィン１２が列設されてい
るので、基部１１および放熱フィン１２の面とほぼ平行
な向きに生じる気流によって放熱効果を高めることがで
きる。ところが、基部１１に対して垂直な向きに気流が
生じ難いので、放熱フィン１２の表面積するにも関わら
ず充分な放熱効果を得ることができない。The radiator 10 has a flat base 1.
Since the plate-shaped radiating fins 12 are arranged in a line perpendicular to 1, the radiating effect can be enhanced by an airflow generated in a direction substantially parallel to the surfaces of the base 11 and the radiating fins 12. However, since airflow is unlikely to occur in a direction perpendicular to the base 11, a sufficient heat dissipation effect cannot be obtained despite the surface area of the heat dissipation fins 12.
【０００５】また、上記放熱器１０は、鋳造型や押し出
し成形型によって形成されるので、放熱フィン１２が設
けられる位置が予め決まってしまい、これに伴い発熱素
子７を取り付ける位置も制約されてしまう。従って、回
路基板６における配線パターンの設計自由度も制約を受
ける。仮に、放熱フィン１２の位置を変更する場合に
は、金型を変更しなければならず膨大な費用を必要とす
る問題がある。Further, since the radiator 10 is formed by a casting die or an extrusion die, the position where the radiating fins 12 are provided is determined in advance, and accordingly, the position where the heating element 7 is attached is restricted. . Therefore, the degree of freedom in designing the wiring pattern on the circuit board 6 is also restricted. If the position of the radiating fins 12 is changed, there is a problem that the die must be changed and a huge cost is required.
【０００６】本発明は以上のような従来技術の問題点を
解決するためになされたもので、放熱効果に優れた筒状
の放熱フィンを有する放熱器を簡単安価な方法により製
造することができる放熱器の形成方法を提供することを
目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and a radiator having a cylindrical radiating fin having an excellent radiating effect can be manufactured by a simple and inexpensive method. An object of the present invention is to provide a method for forming a radiator.
【０００７】[0007]
【問題を解決するための手段】上記の目的を達成するた
めに、本発明にかかる放熱器は、熱伝導性を有する金属
板の一方面側から、押圧工具を押圧して略擂り鉢状の凹
部を形成すると共に他方面に凸部を形成する押圧工程
と、上記凹部の底部に細径の透孔をポンチにより打ち抜
く打ち抜き工程と、上記ポンチの外径より大きい径のバ
ーリング工具を上記擂り鉢状の凹部側から貫通して上記
金属板の他方面から筒状の放熱フィンを形成するバーリ
ング工程とを少なくとも備え、上記金属板に塑性変形に
より筒状の放熱フィンを多数個立設したことを特徴とし
ている。Means for Solving the Problems In order to achieve the above object, a radiator according to the present invention is provided by pressing a pressing tool from one side of a heat conductive metal plate into a substantially mortar shape. A pressing step of forming a concave part and a convex part on the other surface, a punching step of punching a small-diameter through hole at the bottom of the concave part with a punch, and a burring tool having a diameter larger than the outer diameter of the punch. At least a burring step of forming a cylindrical heat radiation fin from the other surface of the metal plate penetrating from the concave side of the metal plate, wherein a large number of cylindrical heat radiation fins are erected by plastic deformation on the metal plate. Features.
【０００８】また、筒状の放熱フィン高さを金属板の板
厚のほぼ１乃至３倍としたことを特徴としている。Further, the height of the cylindrical radiating fins is substantially one to three times the thickness of the metal plate.
【０００９】さらにまた、金属板の一方面側から、押圧
する押圧工具を先細り状に形成し、金属板の板厚に近似
した深さの略擂り鉢状の凹部を形成することを特徴とし
ている。Still further, a pressing tool for pressing is formed in a tapered shape from one side of the metal plate, and a substantially mortar-shaped concave portion having a depth similar to the thickness of the metal plate is formed. .
【００１０】[0010]
【発明の実施の形態】以下、図面を参照して、本発明に
かかる放熱器の形成方法について詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for forming a radiator according to the present invention will be described in detail with reference to the drawings.
【００１１】［放熱器の構造］図１は、本発明の形成方
法によって形成された放熱器を示す断面図であり、
（ａ）は放熱器単体を拡大して示したもの、（ｂ）は当
該放熱器に発熱を伴う電子部品を当接させた状態を示し
たものである。FIG. 1 is a sectional view showing a radiator formed by the method of the present invention.
(A) is an enlarged view of the radiator alone, and (b) is a state in which an electronic component that generates heat is brought into contact with the radiator.
【００１２】図１（ａ）に示すように、放熱器１は、ア
ルミニウム等の熱伝導性に優れた金属板２からなる基部
２ａを塑性変形することにより、円形の筒状に形成され
た複数の放熱フィン３が形成されている。筒状の放熱フ
ィン３は、後述する形成方法により、金属板の基部２の
板厚ｔに対してほぼ１乃至３倍の高さｈに形成され、放
熱フィン３中央には基部２の表裏面に貫通した貫通孔４
が設けられている。As shown in FIG. 1A, a radiator 1 has a plurality of circular tubs formed by plastically deforming a base 2a made of a metal plate 2 having excellent thermal conductivity such as aluminum. Radiating fins 3 are formed. The tubular radiating fins 3 are formed at a height h approximately 1 to 3 times the thickness t of the base 2 of the metal plate by a forming method described later, and the front and back surfaces of the base 2 are provided at the center of the radiating fins 3. Through hole 4 penetrating through
Is provided.
【００１３】また、この筒状の放熱フィン３が突出した
金属板２の他方面には、貫通孔４に連通した開口部の周
縁に略擂り鉢状の凹部５が形成されている。この凹部５
を形成することにより、本来あるべき金属板２の肉を、
塑性変形により放熱フィン３方向に移動し、放熱フィン
３に必要な所定の高さｈを得るようにしている。そし
て、これら筒状の放熱フィン３は、上記略擂り鉢状の凹
部５が互いに重複しないように所定の間隔Ｐをおいて立
設されている。尚、放熱フィン３は円形の他に、略四角
形や三角形等の多角形にすることができる。On the other surface of the metal plate 2 from which the cylindrical radiating fins 3 protrude, a substantially mortar-shaped concave portion 5 is formed at the periphery of the opening communicating with the through hole 4. This recess 5
By forming, the meat of the metal plate 2 which should be originally,
It moves in the direction of the radiating fins 3 due to plastic deformation, so that a predetermined height h required for the radiating fins 3 is obtained. These tubular heat radiation fins 3 are erected at a predetermined interval P so that the above-mentioned substantially mortar-shaped concave portions 5 do not overlap with each other. The radiation fins 3 can be formed in a polygon other than a circle, such as a substantially quadrangle or a triangle.
【００１４】このように構成された放熱器１は、複数の
放熱フィン３が筒状に形成されていることから、従来技
術に示した放熱フィンを有する放熱器（図５を参照）に
比較して面積が増大している。従って、この表面積の増
大に比例して放熱効果が高められる。つまり、筒状の放
熱フィン３は、内周面と外周面および上端面を合計した
面積が表面積となるが、筒状の放熱フィン３の場合に
は、少なくとも貫通孔４の内周面の表面積が拡大してい
る。また、この貫通孔４を設けているので、冷却用の空
気が流通して放熱が大幅に促進する。The radiator 1 thus configured has a plurality of radiating fins 3 formed in a cylindrical shape, and thus is compared with the radiator having the radiating fins shown in the prior art (see FIG. 5). The area is increasing. Therefore, the heat radiation effect is increased in proportion to the increase in the surface area. In other words, the surface area of the cylindrical heat radiation fin 3 is the total area of the inner peripheral surface, the outer peripheral surface, and the upper end surface, but in the case of the cylindrical heat radiation fin 3, at least the surface area of the inner peripheral surface of the through hole 4. Is expanding. Further, since the through holes 4 are provided, cooling air flows and heat radiation is greatly promoted.
【００１５】以上の放熱器１は、図１（ｂ）に示すよう
に両端がケース８に取り付けられ、片面にはＣＰＵ等の
電子部品７の裏面がほぼ面接合するように当接してい
る。そして、所定の配線パターン（図示せず）が敷設さ
れた回路基板６を介して電子部品７に通電すると、この
電子部品７の作動により生じる熱は、電子部品７に当接
した放熱器１に伝わる。このとき、放熱器１には筒状の
放熱フィン３が複数個設けられているので、前述の如く
表面積が増大していることに加え、貫通孔４による冷却
用空気の流通により放熱が効率よく行える。As shown in FIG. 1B, both ends of the radiator 1 are attached to the case 8, and one side of the radiator 1 is in contact with the back surface of an electronic component 7 such as a CPU so that the back surface is almost joined. When electric current is applied to the electronic component 7 through the circuit board 6 on which a predetermined wiring pattern (not shown) is laid, heat generated by the operation of the electronic component 7 is transmitted to the radiator 1 in contact with the electronic component 7. Convey. At this time, since the radiator 1 is provided with a plurality of cylindrical radiating fins 3, the surface area is increased as described above, and the heat is efficiently radiated by the flow of the cooling air through the through holes 4. I can do it.
【００１６】［放熱器の製造方法］次に、本発明にかか
る放熱器の製造方法について説明する。図２（ａ）乃至
（ｃ）は、筒状の放熱フィン３の加工工程を示すもので
ある。先ず、図２（ａ）は押圧工程を示し、アルミニウ
ム等の熱伝導性に優れた金属板２に、先端を小径な平坦
面に形成し、この先端からテーパ状に拡開する先細り状
の押圧工具３０を用いて押圧し、金属板２の一方面に
は、金属板２の板厚を超える深さの擂り鉢状の凹部５を
形成し、金属板２の他面には凸部２１を突出形成する。[Method of Manufacturing a Heatsink] Next, a method of manufacturing a heatsink according to the present invention will be described. 2 (a) to 2 (c) show a processing step of the cylindrical heat radiation fin 3. FIG. First, FIG. 2A shows a pressing step, in which a metal plate 2 made of aluminum or the like having excellent thermal conductivity is formed with a small-diameter flat surface at a tip and is tapered from the tip into a tapered shape. Pressing using a tool 30, a mortar-shaped concave portion 5 having a depth exceeding the thickness of the metal plate 2 is formed on one surface of the metal plate 2, and a convex portion 21 is formed on the other surface of the metal plate 2. Form a protrusion.
【００１７】この押圧工程により、金属板２の一方面に
擂り鉢状の凹部５を形成すると、凹部５にあった肉が、
金属板２の他方面に形成される凸部２１に移動し、凸部
２１の肉が増加する。この押圧工程における押圧工具
は、図２（ｂ）に示すように、先端を略半球状に形成し
押圧工具３０ａであってもよい。また、押圧工具の先端
側形状としては、図２に示すような比較的大きな角度の
テーパを持たせる必要はなく、小さい角度に形成する
等、任意の角度に設定することができる。When the mortar-shaped concave portion 5 is formed on one surface of the metal plate 2 by this pressing step, the meat in the concave portion 5
The protrusion 21 moves to the protrusion 21 formed on the other surface of the metal plate 2 and the thickness of the protrusion 21 increases. As shown in FIG. 2 (b), the pressing tool in this pressing step may be a pressing tool 30a having a substantially hemispherical tip. Also, the tip side shape of the pressing tool does not need to have a relatively large angle of taper as shown in FIG. 2 and can be set to an arbitrary angle such as forming a small angle.
【００１８】次に、打ち抜き工程により、押圧工程を経
た金属板２の凸部２１をダイ４０に載置し、細径の棒状
部分を有するポンチ３１を擂り鉢状の凹部５の開口側か
ら貫通させて凹部５の底部を打ち抜き、細径の透孔２２
を穿設する。Next, the projection 21 of the metal plate 2 which has been subjected to the pressing step is placed on the die 40 by a punching step, and a punch 31 having a small-diameter rod-like portion is penetrated from the opening side of the mortar-shaped recess 5. Then, the bottom of the concave portion 5 is punched, and the small-diameter through hole 22 is formed.
Drilling.
【００１９】その後、打ち抜き工程を経た金属板２をダ
イ４１に設置し、バーリング工程により、ポンチ３１の
棒状部分よりも大きい径の棒状部分を有するバーリング
工具３２を擂り鉢状の凹部５の開口側から貫通させる。
このバーリング工程により、上記孔２２を拡径すると共
に、筒状の放熱フィン３を形成する。この結果、金属板
２の他方面に形成される筒状の放熱フィン３の高さを、
板厚に対してほぼ１乃至３倍とすることができる。因み
に、金属板２の板厚を１mm乃至３mmとしたとき、筒状の
放熱フィン３の高さは１mm乃至９mmとなる。また、上記
板厚の場合は、放熱フィン３の外径寸法を１mm乃至５mm
とするのが望ましく、最も高い放熱効果が得られる。Thereafter, the metal plate 2 which has been subjected to the punching step is placed on a die 41, and a burring tool 32 having a rod-shaped portion having a diameter larger than the rod-shaped portion of the punch 31 is opened by a burring step. Through.
Through this burring step, the diameter of the hole 22 is increased, and the cylindrical heat radiation fins 3 are formed. As a result, the height of the cylindrical heat radiation fin 3 formed on the other surface of the metal plate 2 is
It can be approximately one to three times the plate thickness. Incidentally, when the thickness of the metal plate 2 is 1 mm to 3 mm, the height of the cylindrical heat radiation fins 3 is 1 mm to 9 mm. In the case of the above-mentioned plate thickness, the outer diameter of the radiation fin 3 is 1 mm to 5 mm.
It is desirable to obtain the highest heat radiation effect.
【００２０】以上の各工程により形成すると、何れも金
属板２に対して塑性変形を施したものであり、鋳造型な
ど複雑な構造の金型を必要としないので、低コストで製
造することが可能となる。なお、これらの工程は一連の
順送り加工で行なってもよいし、単発加工で行なっても
よい。また、通常は、各工程において、多数の放熱フィ
ン３を多数の押圧工具３０、ポンチ３１、及び、バーリ
ング工具３２を用いて同時に形成することが好ましい
が、１個づつ、或いは、複数個づつ分割して形成するよ
うようにしてもよい。When the metal plate 2 is formed by the above-described steps, the metal plate 2 is plastically deformed, and a metal mold having a complicated structure such as a casting mold is not required. It becomes possible. Note that these steps may be performed by a series of progressive processing or single-shot processing. Usually, in each process, it is preferable to simultaneously form a large number of radiating fins 3 using a large number of pressing tools 30, punches 31, and burring tools 32, but it is preferable to divide one by one or a plurality of fins. You may make it form.
【００２１】以上のような３工程により加工することに
より、金属板２には板厚に対してほぼ１乃至３倍の高さ
を有する筒状の放熱フィン３を形成することができる。
このように、筒状の放熱フィン３を設けた放熱器１は、
複数の放熱フィン３を含めた単位空間における表面積が
増加すると共に、放熱フィン３の貫通孔４によって更に
表面積が増加するため、放熱効果を一段と高めることが
できる。さらに、この筒状の放熱フィン３の開口部に擂
り鉢状の凹部５を形成しているため、一層表面積が増大
するため放熱効果を高めるられ、その上、擂り鉢状の凹
部５の形状効果によって、熱気流が擂り鉢状の凹部５か
ら放熱フィン３の貫通孔４に導入されやすくなり、この
結果、対流効果が増大するため、放熱効果の高い放熱器
が得られる。一般に、ＣＰＵ等の集積回路に対しては、
特に冷却を必要とするため、冷却ファンを用いて放熱器
１を強制冷却するが、放熱フィン３の貫通孔４内に、冷
却ファンによる冷却風を通過させることにより、放熱効
果は従来の放熱器に対し、およそ５倍以上に達すること
が実験結果として得られた。By performing the processing in the above three steps, it is possible to form the cylindrical heat radiating fin 3 having a height of about 1 to 3 times the thickness of the metal plate 2.
Thus, the radiator 1 provided with the tubular radiating fins 3 is:
The surface area in the unit space including the plurality of radiating fins 3 is increased, and the surface area is further increased by the through holes 4 of the radiating fins 3, so that the heat radiation effect can be further enhanced. Further, since the mortar-shaped concave portion 5 is formed in the opening of the cylindrical radiating fin 3, the surface area is further increased, so that the heat radiation effect can be enhanced. In addition, the shape effect of the mortar-shaped concave portion 5 can be improved. This facilitates the introduction of the hot air flow from the mortar-shaped concave portion 5 into the through hole 4 of the radiating fin 3, and as a result, the convection effect is increased, so that a radiator having a high heat radiating effect can be obtained. Generally, for an integrated circuit such as a CPU,
Since cooling is particularly required, the radiator 1 is forcibly cooled by using a cooling fan. However, by passing the cooling air from the cooling fan through the through holes 4 of the radiating fins 3, the radiating effect is reduced. It was obtained as an experimental result that it reached about 5 times or more.
【００２２】図４（ａ）（ｂ）は、金属板２上に形成す
る筒状の放熱フィン３の配列例を示し、図４（ａ）は、
金属板２に多数の筒状の放熱フィン３を複数列に整列さ
せて形成したものである。また、図４（ｂ）は、金属板
２の中央部分に電子部品７を搭載するスペースを設ける
と共に、その電子部品７の周囲に多数の筒状の放熱フィ
ン３をランダムに形成した例を示している。このよう
に、電子部品７を配設する場合には、電子部品７の周囲
に多数の筒状の放熱フィン３を同心円状に複数列を形成
するようにしてもよく、さらには、電子部品７の発熱部
位側に集中して多数の放熱フィン３を形成したり、或い
は、隣接される他の構成部品とのスペースの関係から、
放熱フィン３を形成しない部位を設ける等、さまざまな
配列パターンを形成することが可能である。FIGS. 4A and 4B show an example of the arrangement of cylindrical heat radiation fins 3 formed on the metal plate 2. FIG.
A large number of tubular radiating fins 3 are formed on a metal plate 2 and arranged in a plurality of rows. FIG. 4B shows an example in which a space for mounting the electronic component 7 is provided in the central portion of the metal plate 2 and a large number of cylindrical radiation fins 3 are randomly formed around the electronic component 7. ing. As described above, when the electronic component 7 is provided, a plurality of cylindrical heat radiation fins 3 may be formed concentrically in a plurality of rows around the electronic component 7. Forming a large number of heat dissipating fins 3 concentrated on the heat generating portion side, or from the space relationship with other adjacent components,
Various arrangement patterns can be formed, for example, by providing a portion where the heat radiation fins 3 are not formed.
【００２３】以上、本発明を実施例に基づき具体的に説
明したが、本発明は上記実施例に限定されるものではな
く、その要旨を逸脱しない範囲で種々変形可能であるこ
とは言うまでもない。例えば、金属板２０に形成する多
数の筒状の放熱フィン３の高さが低い場合には、前述し
た打ち抜き工程とバーリング工程とを同一の工具によっ
て行ってもよい。また、筒状の放熱フィン３に形成する
擂り鉢状の開口部は、直線状のテーパ孔でなくとも、円
弧状に形成してもよい。さらに、略擂り鉢状の凹部５
は、図３に示すように、金属板２の板厚に対して２分の
１以下の深さであってもよく、図４（ｃ）に示すよう
に、筒状の放熱フィン３の高さを形成する部位によって
異ならせてもよい。As described above, the present invention has been specifically described based on the embodiments. However, it is needless to say that the present invention is not limited to the above-described embodiments and can be variously modified without departing from the gist thereof. For example, when the height of a large number of cylindrical heat radiation fins 3 formed on the metal plate 20 is low, the above-described punching step and burring step may be performed using the same tool. Further, the mortar-shaped opening formed in the cylindrical heat-radiating fin 3 may be formed in an arc shape instead of a linear tapered hole. Furthermore, a substantially mortar-shaped recess 5
As shown in FIG. 3, the depth may be less than half the thickness of the metal plate 2, and as shown in FIG. It may be made different depending on the portion where the surface is formed.
【００２４】[0024]
【発明の効果】以上述べたように、本発明による放熱器
の形成方法によれば、少ない工程数により、金属板に多
数の筒状の放熱フィンを簡単に形成することができ、製
造コストを低減することができる。また、筒状の放熱フ
ィンの開口部を漏斗状に形成することにより、その肉が
筒状の放熱フィンに移行できるので、良質な放熱フィン
を形成することができる。この方法によって形成した放
熱器は、金属板の厚さ以上の高さを有する筒状の放熱フ
ィンが多数個形成されているので、放熱器全体の表面積
を増加させることができると共に、放熱フィンが表裏面
に透通する貫通孔を有していることから空気の対流を通
過させることができ、放熱効果を一段と高めることがで
きる。特に、冷却ファンにより強制冷却する場合、冷却
風を放熱器の貫通孔を通過させると放熱効果を数倍以上
に高められる。As described above, according to the method of forming a radiator according to the present invention, a large number of tubular radiating fins can be easily formed on a metal plate with a small number of steps, and the manufacturing cost can be reduced. Can be reduced. Further, by forming the opening of the cylindrical heat radiation fin in a funnel shape, the meat can be transferred to the cylindrical heat radiation fin, so that a high quality heat radiation fin can be formed. In the radiator formed by this method, since a large number of cylindrical radiating fins having a height equal to or greater than the thickness of the metal plate are formed, the surface area of the entire radiator can be increased, and the radiating fins can be increased. Since there is a through hole penetrating the front and back surfaces, convection of air can be passed, and the heat radiation effect can be further enhanced. In particular, in the case of forcible cooling by a cooling fan, the heat radiation effect can be improved several times or more by passing the cooling air through the through holes of the radiator.
【図１】本発明にかかる放熱器の一実施形態を示したも
のであり、（ａ）は放熱器単体の断面図、（ｂ）は放熱
器に電子部品を当接させた状態を示した断面図である。FIG. 1 shows an embodiment of a radiator according to the present invention, in which (a) is a cross-sectional view of a radiator alone, and (b) shows a state in which electronic components are brought into contact with the radiator. It is sectional drawing.
【図２】本発明の放熱器における筒状の放熱フィンの加
工工程を示した図である。FIG. 2 is a view showing a processing step of a cylindrical radiating fin in the radiator of the present invention.
【図３】本発明の放熱器における筒状の放熱フィンの他
の例を示した断面図である。FIG. 3 is a cross-sectional view showing another example of a tubular radiator fin in the radiator of the present invention.
【図４】（ａ）（ｂ）（ｃ）は、本発明の放熱器におけ
る筒状の放熱フィンの配列例を示した平面図である。FIGS. 4 (a), (b) and (c) are plan views showing an example of the arrangement of tubular radiating fins in the radiator of the present invention.
【図５】従来の放熱器の構造を表した断面図である。FIG. 5 is a cross-sectional view illustrating a structure of a conventional radiator.
１ 放熱器 ２ 金属板 ３ 放熱フィン ４ 貫通孔 ５ 凹部 ７ 電子部品 ２２ 透孔 ３０ 押圧工具 ３１ ポンチ３１ ３２ バーリング工具 REFERENCE SIGNS LIST 1 radiator 2 metal plate 3 radiating fin 4 through hole 5 concave portion 7 electronic component 22 through hole 30 pressing tool 31 punch 31 32 burring tool
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｈ０５Ｋ 7/20 Ｈ０１Ｌ 23/36 Ｚ ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification code FI H05K 7/20 H01L 23/36 Z
Claims (3)
ら、押圧工具を押圧して略擂り鉢状の凹部を形成すると
共に他方面に凸部を形成する押圧工程と、上記凹部の底
部に細径の透孔をポンチにより打ち抜く打ち抜き工程
と、上記ポンチの外径より大きい径のバーリング工具を
上記擂り鉢状の凹部側から貫通して上記金属板の他方面
から筒状の放熱フィンを形成するバーリング工程とを少
なくとも備え、上記金属板に塑性変形により筒状の放熱
フィンを多数個立設したことを特徴とする放熱器の形成
方法。1. A pressing step of pressing a pressing tool from one side of a metal plate having thermal conductivity to form a substantially mortar-shaped concave portion and forming a convex portion on the other surface, and a bottom portion of the concave portion. A punching step of punching a small-diameter through hole with a punch, and a burring tool having a diameter larger than the outer diameter of the punch is penetrated from the mortar-shaped concave side, and a cylindrical heat-radiating fin is formed from the other surface of the metal plate. A burring step of forming at least a plurality of tubular radiating fins by plastic deformation on the metal plate.
のほぼ１乃至３倍としたことを特徴とする請求項１記載
の放熱器の形成方法。2. The method for forming a radiator according to claim 1, wherein the height of the cylindrical radiating fin is set to be approximately one to three times the thickness of the metal plate.
具を先細り状に形成し、金属板の板厚に近似した深さの
略擂り鉢状の凹部を形成することを特徴とする請求項１
記載の放熱器の形成方法。3. The method according to claim 1, wherein a pressing tool for pressing is formed in a tapered shape from one surface side of the metal plate, and a substantially mortar-shaped concave portion having a depth similar to the thickness of the metal plate is formed. Item 1
A method for forming the radiator according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12172898A JP4383532B2 (en) | 1998-04-15 | 1998-04-15 | Method of forming a radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12172898A JP4383532B2 (en) | 1998-04-15 | 1998-04-15 | Method of forming a radiator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11290968A true JPH11290968A (en) | 1999-10-26 |
| JP4383532B2 JP4383532B2 (en) | 2009-12-16 |
Family
ID=14818421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12172898A Expired - Fee Related JP4383532B2 (en) | 1998-04-15 | 1998-04-15 | Method of forming a radiator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4383532B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013126673A (en) * | 2011-12-19 | 2013-06-27 | Ricoh Co Ltd | Thin plate burring method and thin plate female screw-forming method |
| JP2017092202A (en) * | 2015-11-09 | 2017-05-25 | かがつう株式会社 | Heat sink and manufacturing method of heat sink and electronic component package using heat sink |
| JP6239809B1 (en) * | 2016-07-01 | 2017-11-29 | かがつう株式会社 | Heat sink and electronic component package |
| US10499537B2 (en) | 2016-07-01 | 2019-12-03 | Kaga, Inc. | Heat sink and electronic component package |
| JP2021053643A (en) * | 2019-09-26 | 2021-04-08 | ダイハツ工業株式会社 | Method for manufacturing component |
| CN117102376A (en) * | 2023-10-23 | 2023-11-24 | 宿迁胜星科技有限公司 | Punching die for processing aluminum profile electronic radiator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013016562A1 (en) * | 2013-09-27 | 2015-04-02 | Kaco Gmbh + Co. Kg | A method for producing a permanent connection between at least two workpieces and a compound prepared by this method |
-
1998
- 1998-04-15 JP JP12172898A patent/JP4383532B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013126673A (en) * | 2011-12-19 | 2013-06-27 | Ricoh Co Ltd | Thin plate burring method and thin plate female screw-forming method |
| JP2017092202A (en) * | 2015-11-09 | 2017-05-25 | かがつう株式会社 | Heat sink and manufacturing method of heat sink and electronic component package using heat sink |
| JP6239809B1 (en) * | 2016-07-01 | 2017-11-29 | かがつう株式会社 | Heat sink and electronic component package |
| US10499537B2 (en) | 2016-07-01 | 2019-12-03 | Kaga, Inc. | Heat sink and electronic component package |
| JP2021053643A (en) * | 2019-09-26 | 2021-04-08 | ダイハツ工業株式会社 | Method for manufacturing component |
| CN117102376A (en) * | 2023-10-23 | 2023-11-24 | 宿迁胜星科技有限公司 | Punching die for processing aluminum profile electronic radiator |
| CN117102376B (en) * | 2023-10-23 | 2024-01-09 | 宿迁胜星科技有限公司 | Punching die for processing aluminum profile electronic radiator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4383532B2 (en) | 2009-12-16 |
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