JP2002026550A - Calking type heat sink - Google Patents
Calking type heat sinkInfo
- Publication number
- JP2002026550A JP2002026550A JP2000199674A JP2000199674A JP2002026550A JP 2002026550 A JP2002026550 A JP 2002026550A JP 2000199674 A JP2000199674 A JP 2000199674A JP 2000199674 A JP2000199674 A JP 2000199674A JP 2002026550 A JP2002026550 A JP 2002026550A
- Authority
- JP
- Japan
- Prior art keywords
- groove
- plate
- fin
- caulking
- heat sink
- 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.)
- Pending
Links
Landscapes
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、かしめ作業性に優
れ、且つかしめ状態が良好な、特に電子機器の冷却に適
したかしめ型ヒートシンクに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a caulking type heat sink which is excellent in caulking workability and good in a caulking state, and is particularly suitable for cooling electronic equipment.
【０００２】[0002]
【従来の技術】ヒートシンクは、図２に示すように、基
板１上に板状フィン４を接合したもので、接合方法に
は、かしめによるもの（かしめ型ヒートシンク）、ろう
付けによるもの、基板と板状フィンを一体に押出成形し
て接合したものなどが知られているが、特にかしめ型ヒ
ートシンクは安価であり最も普及している。2. Description of the Related Art As shown in FIG. 2, a heat sink is formed by joining plate-like fins 4 on a substrate 1. The joining method includes caulking (caulking heat sink), brazing, and a substrate. It is known that a plate-like fin is integrally formed by extrusion molding, and in particular, a caulking type heat sink is inexpensive and most widely used.
【０００３】かしめ型ヒートシンクは、例えば、図３
（イ）、（ロ）に示すように、基板１上に断面角型の突
起部２を、複数本、平行に設け、この突起部２に突起部
２の長さ方向に平行に溝３を設け、溝３の各々に板状フ
ィン４の基部を挿入し、突起部２間のかしめ用溝６に押
圧具（図示せず）の先端部を押込んで、前記突起部２を
構成する突起部片８を溝３側に押圧して板状フィン４の
基部を溝３内にかしめたものである。A caulking type heat sink is shown in FIG.
As shown in (a) and (b), a plurality of projections 2 each having a square cross section are provided in parallel on the substrate 1, and grooves 3 are formed in the projections 2 in parallel with the length direction of the projections 2. The bases of the plate-like fins 4 are inserted into each of the grooves 3, and the tip of a pressing tool (not shown) is pushed into the caulking groove 6 between the protrusions 2, thereby forming the protrusions constituting the protrusions 2. The base of the plate-like fin 4 is crimped into the groove 3 by pressing the piece 8 toward the groove 3.
【０００４】[0004]
【発明が解決しようとする課題】しかし、前記従来のか
しめ型ヒートシンクは、かしめ状態が不良なため所望の
放熱特性が得られなかったり、ごく稀ではあるが輸送中
の振動や衝撃により板状フィンが抜け落ちたりすること
があった。またかしめ用溝への押圧具の押込み作業性が
悪かった。本発明者等は、このような状況に鑑み、かし
め型ヒートシンクについて種々検討し、基板に設ける溝
部分の形状や寸法などを適正に設定することにより、か
しめ状態やかしめ作業性を改善し得ることを知見し、さ
らに検討を重ねて本発明を完成させるに至った。本発明
は、かしめ状態が良好で、且つかしめ作業性に優れ、特
に電子機器の冷却に適したかしめ型ヒートシンクの提供
を目的とする。However, the above-mentioned conventional caulking type heat sink cannot provide desired heat radiation characteristics due to poor caulking condition, or, rarely, vibrates or impacts during transportation. Sometimes fell off. Also, the workability of pushing the pressing tool into the caulking groove was poor. In view of such circumstances, the present inventors have studied variously about the caulking type heat sink, and by appropriately setting the shape and dimensions of the groove portion provided on the substrate, it is possible to improve the caulking state and the caulking workability. After further study, the present invention was completed. An object of the present invention is to provide a caulking type heat sink which has a good caulking state and excellent caulking workability, and is particularly suitable for cooling electronic equipment.
【０００５】[0005]
【課題を解決するための手段】請求項１記載の発明は、
基板上に断面角型の突起部が、複数本、平行に設けら
れ、前記突起部の長さ方向に溝（幅Ｗ、深さＢ）が設け
られ、前記溝に板状フィン（厚さｔ）の基部が挿入さ
れ、前記板状フィンの基部が前記突起部を構成する突起
部片（幅Ａ）を溝側に押圧することによりかしめられて
いるかしめ型ヒートシンクにおいて、かしめ前の基板お
よび板状フィンが下記（ａ）〜（ｃ）の関係式を満足す
ることを特徴とするかしめ型ヒートシンクである。 ０．８≧（Ａ／Ｂ）≧０．４………（ａ） ２．０≧（Ｒ／Ａ）≧０．３………（ｂ） ０．４≧（Ｗ−ｔ）／ｔ≧０．０５（ｃ） 但し、Ｒは突起部片の反溝側の円弧状角部の半径。According to the first aspect of the present invention,
A plurality of square-shaped projections are provided in parallel on the substrate, grooves (width W, depth B) are provided in the length direction of the projections, and plate-like fins (thickness t) are provided in the grooves. ) Is inserted, and the base of the plate-like fin is caulked by pressing the projection piece (width A) constituting the projection toward the groove side. A swaged heat sink characterized in that the fins satisfy the following relational expressions (a) to (c). 0.8 ≧ (A / B) ≧ 0.4 (a) 2.0 ≧ (R / A) ≧ 0.3 (b) 0.4 ≧ (W−t) / t ≧ 0.05 (c) where R is the radius of the arc-shaped corner on the side opposite to the groove of the projection piece.
【０００６】[0006]
【発明の実施の形態】本発明は、基板上に設けられた突
起部片の幅Ａと溝深さＢの比（Ａ／Ｂ）、突起部片の反
溝側の円弧状角部の半径Ｒと突起部片の幅Ａの比（Ｒ／
Ａ）および溝幅Ｗと板状フィンの厚さｔとの関係（Ｗ−
ｔ）／ｔを適正に規定することにより、板状フィンのか
しめ状態およびかしめ作業性を改善したものである。BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a ratio (A / B) of a width A of a projection piece provided on a substrate to a groove depth B (A / B), and a radius of an arc-shaped corner on a side opposite to a groove of the projection piece. R and the ratio of the width A of the projection piece (R /
A) and the relationship between the groove width W and the thickness t of the plate-like fin (W−
By properly defining t) / t, the caulking state of the plate-like fin and the caulking workability are improved.
【０００７】本発明において、前記（Ａ／Ｂ）を０．８
以下０．４以上に規定する理由は、Ａが大きく（厚く）
て（Ａ／Ｂ）が０．８を超える場合はかしめに多大の労
力を要しかしめ作業性が悪化するためであり、Ｂが小さ
く（浅く）て（Ａ／Ｂ）が０．８を超える場合は十分な
かしめ力が得られないためである。またＡが小さく（薄
く）て（Ａ／Ｂ）が０．４未満になる場合は十分なかし
め力が得られないためであり、Ｂが大きく（深く）て
（Ａ／Ｂ）が０．４未満になる場合は溝内面と板状フィ
ンとの有効な接触面積（放熱特性）が飽和するうえ、基
板（押出形材）の溝加工が困難になるためである。In the present invention, (A / B) is set to 0.8
The reason for specifying below 0.4 or more is that A is large (thick)
When (A / B) exceeds 0.8, a large amount of labor is required for caulking and workability deteriorates, and B is small (shallow) and (A / B) exceeds 0.8. In this case, sufficient crimping force cannot be obtained. Also, when A is small (thin) and (A / B) is less than 0.4, it is because a sufficient caulking force cannot be obtained, and when B is large (deep) and (A / B) is 0.4 If it is less than the above, the effective contact area (radiation characteristic) between the inner surface of the groove and the plate-like fin is saturated, and the groove processing of the substrate (extruded shape) becomes difficult.
【０００８】本発明において、前記（Ｒ／Ａ）を２．０
以下０．３以上に規定する理由は、曲率半径Ｒが大きく
て（Ｒ／Ａ）が２．０を超える場合はかしめ具が突起部
片の下方で接触するため突起部片を溝側に押圧するのが
困難になるためであり、Ａが小さく（薄く）て（Ｒ／
Ａ）が２．０を超える場合は突起部片によるかしめ力が
十分に得られないためである。また曲率半径Ｒが小さく
て（Ｒ／Ａ）が０．３未満となる場合は、かしめ具をか
しめ溝に押込む際にかしめ具が突起部片にぶつかり易く
なるためであり、Ａが大きく（厚く）て（Ｒ／Ａ）が
０．３未満となる場合は突起部片を溝側に押圧するのに
多大の労力を要するためである。In the present invention, (R / A) is set to 2.0
Hereinafter, the reason why the radius is defined to be 0.3 or more is that when the radius of curvature R is large and (R / A) exceeds 2.0, the caulking tool contacts below the protruding piece so that the protruding piece is pressed toward the groove. This is because A becomes small (thin) and (R /
If A) exceeds 2.0, the crimping force of the projection pieces cannot be sufficiently obtained. When the radius of curvature R is small and (R / A) is less than 0.3, the caulking tool is likely to hit the protruding piece when the caulking tool is pressed into the caulking groove. This is because when (R / A) is less than 0.3, a large amount of labor is required to press the projection piece toward the groove.
【０００９】本発明において、前記（Ｗ−ｔ）／ｔを
０．４以下０．０５以上に規定する理由は、０．４を超
えると板状フィンと溝内面との間隙が大きすぎて双方の
密着性が劣り、０．０５未満では板状フィンと溝内面と
の間隙が小さすぎて板状フィンを溝内に挿入し難くなる
ためである。In the present invention, the reason that (Wt) / t is defined to be 0.4 or less and 0.05 or more is that if it exceeds 0.4, the gap between the plate-like fin and the inner surface of the groove is too large and both Is less than 0.05, the gap between the plate-like fin and the inner surface of the groove is too small, and it is difficult to insert the plate-like fin into the groove.
【００１０】本発明において、基板上の突起部に設ける
溝の幅Ｗ、深さＢ、前記突起部を構成する突起部片の幅
Ａ並びに板状フィンの厚さｔの寸法は、通常使用されて
いるかしめ型ヒートシンクのそれに近似したものであ
り、その近似した寸法の中で、（Ａ／Ｂ）、（Ｒ／
Ａ）、（（Ｗ−ｔ）／ｔ）などの比を規定したものであ
る。In the present invention, the dimensions of the width W and depth B of the groove provided in the projection on the substrate, the width A of the projection piece constituting the projection and the thickness t of the plate-like fin are usually used. It is an approximation of that of a caulking type heat sink, and (A / B), (R /
A), ((W-t) / t) and the like.
【００１１】[0011]
【実施例】以下に、本発明を実施例により詳細に説明す
る。 （実施例１）図１（イ）に示すように、基板１の上面に
断面角型の突起部２を、２７個、平行に設け、各突起部
２にはその長さ方向にそれぞれ溝３を設け、溝３の各々
に板状フィン４の基部を挿入し、次いで図１（ロ）に示
すように、基板１を受け板５上に載せ、基板１上面の突
起部２間のかしめ用溝６に押圧具７の先端部を押込んで
突起部片８を溝３側に押圧して板状フィン４を溝３内に
かしめて、図１（ハ）に示すかしめ型ヒートシンクを製
造した。基板には幅１２０ｍｍ、長さ２００ｍｍ、厚さ
１０ｍｍのアルミニウム合金押出形材を用いた。板状フ
ィンには幅１２０ｍｍ、高さ（溝内部分を含む）１００
ｍｍ、厚さｔｍｍのアルミニウム合金板を用いた（図２
参照）。図１（イ）に示した、かしめ前の基板の溝幅
Ｗ、溝深さＢ、突起部片の幅Ａ、突起部片の反溝側の円
弧状角部の半径Ｒ、および板状フィンの厚さｔは、表１
に示すように、本発明で規定する関係式（ａ）〜（ｃ）
を満足する範囲で種々に変化させた。The present invention will be described below in detail with reference to examples. (Example 1) As shown in FIG. 1A, 27 protrusions 2 each having a rectangular cross section are provided in parallel on the upper surface of a substrate 1, and each protrusion 2 has a groove 3 in its longitudinal direction. And the base of the plate-like fin 4 is inserted into each of the grooves 3, and then the substrate 1 is placed on the receiving plate 5, as shown in FIG. The protruding piece 8 was pressed into the groove 6 to press the protruding piece 8 toward the groove 3 to caulk the plate-like fin 4 into the groove 3, thereby producing a caulked heat sink shown in FIG. As the substrate, an extruded aluminum alloy material having a width of 120 mm, a length of 200 mm, and a thickness of 10 mm was used. The plate-like fin has a width of 120 mm and a height (including the inside of the groove) of 100 mm.
mm, and an aluminum alloy plate having a thickness of tmm was used (FIG. 2).
reference). The groove width W, the groove depth B, the width of the projection piece, the radius R of the arc-shaped corner on the side opposite to the groove of the projection piece, and the plate-like fin shown in FIG. Table 1 shows the thickness t of
As shown in the following, relational expressions (a) to (c) defined in the present invention
Was varied in a range satisfying the above.
【００１２】（比較例１）かしめ前の基板の溝幅Ｗ、溝
深さＢ、突起部片の幅Ａ、突起部片の反溝側の円弧状角
部の半径Ｒ、および板状フィンの厚さｔを表１に示すよ
うに、前記関係式（ａ）〜（ｃ）を満足しない範囲で種
々に変化させた他は、実施例１と同じ方法によりかしめ
型ヒートシンクを製造した。Comparative Example 1 A groove width W, a groove depth B, a width A of a protruding piece, a radius R of an arc-shaped corner on a side opposite to a groove of a protruding piece, and a shape of a plate-like fin before caulking. As shown in Table 1, a caulked heat sink was manufactured in the same manner as in Example 1, except that the thickness t was variously changed so as not to satisfy the above-mentioned relational expressions (a) to (c).
【００１３】実施例１および比較例１で製造した各々の
かしめ型ヒートシンクについて、かしめ作業性およびか
しめ状態を調べた。かしめ作業性については（１）溝へ
の板状フィンの挿入性、（２）かしめ溝への押圧具の挿
入性、（３）かしめ溝への押圧具の押込力（かしめ荷
重）を調べ評価した。かしめ状態については（４）溝内
面と板状フィンとの隙間の有無、（５）溝から板状フィ
ンを引抜く際の引抜力を調べ評価した。調査および評価
結果を表２に示す。For each of the caulked heat sinks produced in Example 1 and Comparative Example 1, the caulking workability and the caulked state were examined. Regarding the caulking workability, (1) insertability of the plate-like fin into the groove, (2) insertability of the pressing tool into the caulking groove, and (3) pressing force (caulking load) of the pressing tool into the caulking groove are evaluated. did. Regarding the swaged state, (4) the presence or absence of a gap between the inner surface of the groove and the plate-like fin, and (5) the pulling force when pulling out the plate-like fin from the groove were evaluated. Table 2 shows the survey and evaluation results.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】表２より明らかなように、本発明例品のＮ
ｏ．１〜９は、いずれも前記（１）〜（５）を満足し、
かしめ作業性およびかしめ状態に優れるものであった。
これに対し、比較例のＮｏ．１０は溝が深すぎて（Ａ／
Ｂ）が本発明規定値未満となり、本発明例のＮｏ．２と
較べてかしめ状態が飽和しており、しかも、溝が深井た
め基板の押出成形が困難であった。Ｎｏ．１１はＡが厚
すぎたため（Ａ／Ｂ）が本発明規定値を超えかしめ荷重
が増大し、またＲが小さかったため（Ｒ／Ａ）が本発明
規定値未満となり押圧具の挿入性が劣った。Ｎｏ．１２
はＲが小さかったため（Ｒ／Ａ）が本発明規定値未満と
なり押圧具の挿入性が劣った。Ｎｏ．１３はＲが大きす
ぎたため（Ｒ／Ａ）が本発明規定値を超え、またｗが大
きすぎたため（ｗ−ｔ）／ｔが本発明規定値を超え、か
しめ状態が劣った。Ｎｏ．１４はｔが小さいため（ｗ−
ｔ）／ｔが本発明規定値を超え、かしめ状態が劣った。As is evident from Table 2, the N
o. 1 to 9 all satisfy the above (1) to (5),
The staking workability and the staking state were excellent.
On the other hand, in Comparative Example No. 10 has too deep grooves (A /
B) is less than the specified value of the present invention, and No. B of the present invention example. As compared with 2, the swaged state was saturated, and furthermore, the grooves were deep well, so that the extrusion of the substrate was difficult. No. In No. 11, because A was too thick, (A / B) exceeded the specified value of the present invention and the caulking load increased, and because R was small, (R / A) was less than the specified value of the present invention, and the insertability of the pressing tool was poor. . No. 12
Since R was small, (R / A) was less than the value specified in the present invention, and the insertability of the pressing tool was poor. No. In No. 13, (R / A) exceeded the value specified in the present invention because R was too large, and (wt) / t exceeded the value specified in the present invention because w was too large, and the crimping state was poor. No. 14 has a small t (w−
t) / t exceeded the value specified in the present invention, and the crimping state was poor.
【００１７】前記実施例（本発明例）では、基板溝への
板状フィンの挿入およびかしめを常温で高速度で行った
が、何のトラブルも起きなかった。本発明では、基板の
溝内に、予め、熱伝導性接着剤を入れておくと、基板と
板状フィン間の熱伝達性が向上し、より放熱特性に優れ
るかしめ型ヒートシンクが得られる。In the above embodiment (Example of the present invention), the insertion and crimping of the plate-like fin into the substrate groove were performed at room temperature at a high speed, but no trouble occurred. In the present invention, if a heat conductive adhesive is previously placed in the groove of the substrate, the heat transfer between the substrate and the plate-like fins is improved, and a caulked heat sink having more excellent heat radiation characteristics can be obtained.
【００１８】[0018]
【発明の効果】以上に述べたように、本発明のかしめ型
ヒートシンクは、基板上に設けられた突起部を構成する
突起部片の幅Ａと溝深さＢの比（Ａ／Ｂ）、突起部片の
反溝側の円弧状角部の半径Ｒと突起部片の幅Ａの比（Ｒ
／Ａ）、および溝幅Ｗと板状フィンの厚さｔとの関係
（Ｗ−ｔ）／ｔを適正に規定したもので、板状フィンの
かしめ作業性およびかしめ状態に優れ、工業上顕著な効
果を奏する。As described above, the caulking type heat sink of the present invention has a ratio (A / B) of the width A of the projection piece constituting the projection provided on the substrate to the groove depth B, The ratio (R) of the radius R of the arc-shaped corner on the side opposite to the groove of the projection piece to the width A of the projection piece
/ A), and the relationship (W-t) / t between the groove width W and the thickness t of the plate-like fins is properly defined, and the plate-like fins have excellent workability and a state of being swaged, and are industrially remarkable. Effect.
【図１】本発明のかしめ型ヒートシンクの実施形態を示
す、（イ）はかしめ前の横断面説明図、（ロ）はかしめ
作業時の横断面説明図、（ハ）はかしめ後の横断面説明
図である。FIG. 1 shows an embodiment of a caulking type heat sink of the present invention, (a) is a cross-sectional explanatory view before caulking, (b) is a cross-sectional explanatory view at the time of caulking work, and (c) is a cross-sectional view after caulking. FIG.
【図２】ヒートシンクの斜視説明図である。FIG. 2 is a perspective explanatory view of a heat sink.
【図３】（イ）は従来のかしめ型ヒートシンクのかしめ
前の平面説明図、（ロ）は図（イ）のａ−ａ矢視図であ
る。FIG. 3A is an explanatory plan view of a conventional caulked heat sink before caulking, and FIG. 3B is a view taken along the line aa in FIG.
１ 基板 ２ 突起部 ３ 溝 ４ 板状フィン ５ 受け板 ６ かしめ用溝 ７ 押圧具 ８ 突起部片 DESCRIPTION OF SYMBOLS 1 Substrate 2 Protrusion part 3 Groove 4 Plate fin 5 Receiving plate 6 Caulking groove 7 Pressing tool 8 Protrusion piece
Claims (1)
平行に設けられ、前記突起部の長さ方向に溝（幅Ｗ、深
さＢ）が設けられ、前記溝に板状フィン（厚さｔ）の基
部が挿入され、前記板状フィンの基部が前記突起部を構
成する突起部片（幅Ａ）を溝側に押圧することによりか
しめられているかしめ型ヒートシンクにおいて、かしめ
前の基板および板状フィンが下記（ａ）〜（ｃ）の関係
式を満足することを特徴とするかしめ型ヒートシンク。 ０．８≧（Ａ／Ｂ）≧０．４………（ａ） ２．０≧（Ｒ／Ａ）≧０．３………（ｂ） ０．４≧（Ｗ−ｔ）／ｔ≧０．０５（ｃ） 但し、Ｒは突起部片の反溝側の円弧状角部の半径。A plurality of projections having a square cross section on a substrate;
A groove (width W, depth B) is provided in parallel with the length direction of the protrusion, a base of a plate-like fin (thickness t) is inserted into the groove, and a base of the plate-like fin is In the caulking type heat sink which is caulked by pressing the protruding piece (width A) constituting the protruding part toward the groove side, the substrate and the plate-like fin before caulking have the following relational expressions (a) to (c). A swaged heat sink characterized by satisfying the following. 0.8 ≧ (A / B) ≧ 0.4 (a) 2.0 ≧ (R / A) ≧ 0.3 (b) 0.4 ≧ (W−t) / t ≧ 0.05 (c) where R is the radius of the arc-shaped corner on the side opposite to the groove of the projection piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000199674A JP2002026550A (en) | 2000-06-30 | 2000-06-30 | Calking type heat sink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000199674A JP2002026550A (en) | 2000-06-30 | 2000-06-30 | Calking type heat sink |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002026550A true JP2002026550A (en) | 2002-01-25 |
Family
ID=18697657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000199674A Pending JP2002026550A (en) | 2000-06-30 | 2000-06-30 | Calking type heat sink |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002026550A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6924983B2 (en) | 2002-08-05 | 2005-08-02 | Nidec Corporation | Heat sink fan |
| KR200465921Y1 (en) | 2010-05-27 | 2013-03-25 | 충-시엔 후앙 | Heat sink module |
-
2000
- 2000-06-30 JP JP2000199674A patent/JP2002026550A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6924983B2 (en) | 2002-08-05 | 2005-08-02 | Nidec Corporation | Heat sink fan |
| KR200465921Y1 (en) | 2010-05-27 | 2013-03-25 | 충-시엔 후앙 | Heat sink module |
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| A711 | Notification of change in applicant |
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