JPS646522B2 - - Google Patents
Info
- Publication number
- JPS646522B2 JPS646522B2 JP5161183A JP5161183A JPS646522B2 JP S646522 B2 JPS646522 B2 JP S646522B2 JP 5161183 A JP5161183 A JP 5161183A JP 5161183 A JP5161183 A JP 5161183A JP S646522 B2 JPS646522 B2 JP S646522B2
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- heat
- housing
- outer casing
- product
- 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.)
- Expired
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Details Of Resistors (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Description
（技術分野）
本発明は、コスト低減を図つた電力用抵抗器の
製造方法に関するものである。
（従来技術）
従来、放熱フインを設けた外筐の中に抵抗素体
を入れ、それにセメントを充填して構成する電力
用抵抗器は、その外筐がダイカストにより製作さ
れていたため、金型が極めて高価であり、しかも
電力容量の異なる抵抗器の種類に応じて外筐の大
きさも異なるので、各種類毎に金型を用意しなけ
ればならなかつた。例えば、電力容量が60w〜
300wの範囲で７種類の抵抗器がある場合、金型
代が１型300万円とすると、2100万円の金型代が
必要であつた。
（発明の目的）
そこで本発明は、上記従来例の欠点を解消する
ために、断面がほぼコの字形で、外面の少なくと
も一部に複数のフインを有するアルミ押出加工品
を所望の長さに切断して、これを外筐兼放熱器と
するようにした電力用抵抗器の製造方法を提供す
るものである。
本発明方法によれば、前記７種類の抵抗器に対
し、断面形状の異なる押出金型を２種類用意すれ
ばよく、かつ、金型代も１型10万円と極めて低価
格である。
（実施例）
以下、図面に基づいて実施例を詳細に説明す
る。
第１図は、本発明の一実施例の完成品を示した
ものである。１は断面がほぼコの字形をし、外側
の一面に複数の放熱フインを有する放熱器兼用ハ
ウジングである。２ａ，２ｂはエンドブラケツ
ト、３は一方のブラケツト２ａに嵌め込んだブツ
シング、４は、ハウジング１内に封入した抵抗素
体から引き出された耐熱リード線である。
ハウジング１は、第２図に示すＡ―A′のよう
に、アルミ押出加工品１０から所要の長さＬに切
断したものである。表は、抵抗器の種類に応じて
決められたハウジングの寸法を一例として示した
ものであるが、これによれば、断面形状は２種類
(Technical Field) The present invention relates to a method of manufacturing a power resistor with the aim of reducing costs. (Prior art) Conventionally, power resistors were constructed by placing a resistor element in an outer casing with heat dissipation fins and filling it with cement.The outer casing was manufactured by die-casting, so the mold was This is extremely expensive, and since the size of the outer casing varies depending on the type of resistor with different power capacity, a mold must be prepared for each type. For example, the power capacity is 60W~
If there were seven types of resistors in the 300W range, and the mold cost was 3 million yen per type, the mold cost would have been 21 million yen. (Object of the Invention) Therefore, in order to eliminate the drawbacks of the above-mentioned conventional examples, the present invention has an aluminum extrusion product having a substantially U-shaped cross section and a plurality of fins on at least a part of the outer surface, and is made into a desired length. The present invention provides a method of manufacturing a power resistor in which the resistor is cut and used as an outer casing and a heat sink. According to the method of the present invention, it is sufficient to prepare two types of extrusion molds with different cross-sectional shapes for the seven types of resistors, and the mold cost is extremely low at 100,000 yen per mold. (Example) Hereinafter, an example will be described in detail based on the drawings. FIG. 1 shows a completed product according to an embodiment of the present invention. Reference numeral 1 denotes a housing that also serves as a heat radiator and has a substantially U-shaped cross section and has a plurality of heat radiating fins on one outer surface. 2a and 2b are end brackets, 3 is a bushing fitted into one of the brackets 2a, and 4 is a heat-resistant lead wire drawn out from a resistor element enclosed in the housing 1. The housing 1 is obtained by cutting an aluminum extrusion product 10 to a required length L, as shown along line A-A' in FIG. The table shows the dimensions of the housing determined according to the type of resistor as an example, but according to this table, there are two types of cross-sectional shapes.
【表】
であり、従つて必要なダイス型も２型で済む。こ
の２型によりそれぞれ押出されたアルミ押出加工
品を所定の長さに切断すれば、７種類のハウジン
グを容易に得ることができる。
このようにして得たハウジング１の両端部にそ
れぞれエンドブラケツト２ａ，２ｂを取付ける。
ブラケツト２ａ，２ｂには、抵抗器を実装する際
に必要な取付ねじ用切欠６を設けており、また一
方のブラケツト２ａには、リード線引出用ブツシ
ング３を取付ける孔７を設けている。ハウジング
１へのブラケツト２ａ，２ｂの固着は、リベツト
８を用いてプロジエクシヨン溶接を行なう。ある
いはカシメにより固定してもよい。ブツシング３
は耐熱性のある碍子が使用される。
ブラケツトを固着したハウジング１内に、耐熱
リード線４を有し、かつ周囲を適当な絶縁物で被
覆した、例えばコイル状に成形した抵抗素体（図
示せず）を入れ、この上からセメントを流し込ん
で固める。なお、リード線４は、導線の上を耐熱
樹脂で被覆し、さらにその上をガラス編組したも
ので、ブツシング３の孔を通して引き出される。
以上の方法により製造された本実施例の抵抗器
は、そのハウジングが熱伝導度の大きいアルミ製
であり、かつフインを備えているので、放熱特性
が優れており、また、安全性が極めて高い。
なお、ハウジングとして筒状（例えば円筒、角
筒）のアルミ押出加工品を適当な長さに切断して
使用することも考えられるが、この場合、抵抗素
体を入れた後に充填する充填物が溶剤入り無機質
ボンドであると、溶剤の揮発が極めて困難で、実
際上、使用不可能である。また、粉末充填物の場
合は、たとえ加振充填しても充填密度の小さいも
のとなり、従つて熱伝導性が悪い。さらに、後で
抵抗器に振動などが加わると、粉体充填物が沈
み、このため上方に空洞が生じるなど、経年変化
が大きい。以上の理由により、筒状のハウジング
は、本発明に関わる電力用抵抗器には不向きであ
る。
（発明の効果）
以上説明したように、本発明によれば低価格の
押出加工用ダイス型を２種類用意すれば、７種類
の抵抗器に必要な放熱器兼用ハウジングを容易に
得ることができ、従つて、金型代を大幅に削減す
ることができる。又、他の部品も共通使用が可能
なため、標準化が容易になり、全体として著しい
コスト低減を実現することができる。[Table] Therefore, only two die types are required. Seven types of housings can be easily obtained by cutting the aluminum extrusion products extruded by these two molds into predetermined lengths. End brackets 2a and 2b are attached to both ends of the housing 1 thus obtained, respectively.
The brackets 2a and 2b are provided with notches 6 for mounting screws necessary for mounting the resistor, and one of the brackets 2a is provided with a hole 7 for mounting a bushing 3 for drawing out lead wires. The brackets 2a, 2b are fixed to the housing 1 by projection welding using rivets 8. Alternatively, it may be fixed by caulking. Bushing 3
Heat-resistant insulators are used. Into the housing 1 to which the bracket is fixed, a resistive element (not shown) having heat-resistant lead wires 4 and coated with an appropriate insulating material, for example, formed into a coil shape, is placed, and cement is poured over it. Pour and harden. The lead wire 4 is a conductive wire covered with a heat-resistant resin and further braided with glass, and is drawn out through a hole in the bushing 3. The resistor of this example manufactured by the above method has a housing made of aluminum with high thermal conductivity and is equipped with fins, so it has excellent heat dissipation characteristics and is extremely safe. . It is also possible to use a cylindrical (e.g. cylinder, rectangular cylinder) extruded aluminum product cut to an appropriate length as the housing, but in this case, the filler to be filled after inserting the resistor element is If it is an inorganic bond containing a solvent, it is extremely difficult to volatilize the solvent, making it practically unusable. In addition, in the case of powder filling, even if it is filled with vibration, the packing density will be low, and therefore the thermal conductivity will be poor. Furthermore, when vibrations are applied to the resistor later on, the powder filling sinks, creating a cavity above, resulting in significant deterioration over time. For the above reasons, a cylindrical housing is not suitable for the power resistor according to the present invention. (Effects of the Invention) As explained above, according to the present invention, by preparing two types of low-cost extrusion die molds, it is possible to easily obtain housings that also serve as heat sinks required for seven types of resistors. Therefore, the mold cost can be significantly reduced. Further, since other parts can be used in common, standardization becomes easy and a significant cost reduction can be realized as a whole.
第１図は、本発明の一実施例の完成品の外観
図、第２図は、同各部品の斜視図である。
１……放熱器兼用ハウジング、１ａ……フイ
ン、２ａ，２ｂ……エンドブラケツト、３……ブ
ツシング、４……耐熱リード線、６……取付ねじ
用切欠、１０……アルミ押出加工品。
FIG. 1 is an external view of a completed product according to an embodiment of the present invention, and FIG. 2 is a perspective view of each part of the same. 1...Housing that also serves as a heat sink, 1a...Fin, 2a, 2b...End bracket, 3...Bushing, 4...Heat-resistant lead wire, 6...Notch for mounting screw, 10...Aluminum extrusion product.
Claims (1)
一部に複数のフインを有するアルミ押出加工品を
所望の長さに切断し、その両端部に、取付用ねじ
孔若しくは切欠を有するブラケツトを固着してこ
れを外筐兼放熱器とし、該外筐兼放熱器に、絶縁
被覆耐熱リード線を有する抵抗素体を入れた後、
無機質耐熱ボンドを充填して固めることを特徴と
する電力用抵抗器の製造方法。1 Cut an aluminum extrusion product with a roughly U-shaped cross section and multiple fins on at least a portion of its outer surface to a desired length, and attach brackets with mounting screw holes or notches to both ends of the product. Then, use this as an outer casing and radiator, and insert a resistor element having an insulated heat-resistant lead wire into the outer casing and radiator.
A method for manufacturing a power resistor characterized by filling and hardening an inorganic heat-resistant bond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5161183A JPS59178701A (en) | 1983-03-29 | 1983-03-29 | Method of producing power resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5161183A JPS59178701A (en) | 1983-03-29 | 1983-03-29 | Method of producing power resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59178701A JPS59178701A (en) | 1984-10-11 |
| JPS646522B2 true JPS646522B2 (en) | 1989-02-03 |
Family
ID=12891697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5161183A Granted JPS59178701A (en) | 1983-03-29 | 1983-03-29 | Method of producing power resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59178701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505635A (en) * | 2011-10-18 | 2012-06-20 | 中铁大桥局股份有限公司 | Cast-in-situ formwork for bridge construction |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4733357B2 (en) * | 2004-03-12 | 2011-07-27 | ミクロン電気株式会社 | Method for manufacturing outer casing of power resistor |
-
1983
- 1983-03-29 JP JP5161183A patent/JPS59178701A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505635A (en) * | 2011-10-18 | 2012-06-20 | 中铁大桥局股份有限公司 | Cast-in-situ formwork for bridge construction |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59178701A (en) | 1984-10-11 |
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