JPH0412489A - Manufacture of sheath heater - Google Patents
Manufacture of sheath heaterInfo
- Publication number
- JPH0412489A JPH0412489A JP11258990A JP11258990A JPH0412489A JP H0412489 A JPH0412489 A JP H0412489A JP 11258990 A JP11258990 A JP 11258990A JP 11258990 A JP11258990 A JP 11258990A JP H0412489 A JPH0412489 A JP H0412489A
- Authority
- JP
- Japan
- Prior art keywords
- metal tube
- heater
- heater wire
- tube
- coil
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 5
- 238000003754 machining Methods 0.000 abstract 2
- 238000003466 welding Methods 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電熱器等に使用されるシーズヒータに関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sheathed heater used in electric heaters and the like.
電熱器等にシーズヒータが用いられているが、その構造
及び製造方法を第３図の断面図を用いて説明する。同図
において、１は高融点金属からなるヒータ線、２は中軸
となる取付部材、３は金属チューブ、４は耐熱性絶縁材
粉末、５はヒータ線１の端末と取付部材の端末との接合
部である。第３図（イ）に示す如く、ヒータ線ｌの端末
と取付部材の端末との接合部５は溶接によって接合され
ており、この接合されたヒータ線１及び取付部材２の端
部側を金属チューブ３の内腔に挿入配置して、金属チュ
ーブ３の内腔空隙部に耐熱性絶縁材粉末４を充填する。A sheathed heater is used in electric heaters and the like, and its structure and manufacturing method will be explained using the cross-sectional view of FIG. 3. In the figure, 1 is a heater wire made of a high-melting point metal, 2 is a mounting member serving as a center shaft, 3 is a metal tube, 4 is a heat-resistant insulating powder, and 5 is a joint between the end of the heater wire 1 and the end of the mounting member. Department. As shown in FIG. 3(a), the joint 5 between the end of the heater wire 1 and the end of the mounting member is joined by welding, and the end portions of the joined heater wire 1 and the mounting member 2 are connected to metal. The heat-resistant insulating material powder 4 is inserted into the inner cavity of the metal tube 3 to fill the inner cavity of the metal tube 3 .
次に第３図（ロ）に示す如く、金属チューブ３を一端か
ら順次絞り加工し、この絞り加工によって耐熱性絶縁材
粉末４の充填密度を高くし、第３図（ハ）に示す如きシ
ーズヒータが得られる。Next, as shown in FIG. 3(b), the metal tube 3 is drawn sequentially from one end, and the filling density of the heat-resistant insulating material powder 4 is increased by this drawing process, and seeds as shown in FIG. 3(c) are formed. A heater is obtained.
上記の如き従来の製造方法によれば、金属チューブ３の
絞り加工時にヒータ線１と取付部材２との接合部５に応
力が加わり接合部５において断線が多発するという問題
があり、歩留まりが非常に悪い。According to the conventional manufacturing method as described above, there is a problem that stress is applied to the joint 5 between the heater wire 1 and the mounting member 2 during the drawing process of the metal tube 3, resulting in frequent disconnections at the joint 5, resulting in a very low yield. bad for
本発明は、上記の如き問題を解決するためになされたも
ので、ヒータ線の取付部材との溶接端近傍を予めコイル
状または波状に形成しておき、このヒータ線を取付部材
に溶接して、これらを金属チューブ内に挿入配置して、
該金属チューブ内腔の空隙部に耐熱性絶縁材粉末を充填
してのち、金属チューブの絞り加工を行ってシーズヒー
タを構成する製造方法を提供するものである。The present invention has been made to solve the above-mentioned problems, and involves forming the vicinity of the welded end of the heater wire with the mounting member in advance into a coiled or wavy shape, and welding the heater wire to the mounting member. , insert these into a metal tube,
The present invention provides a manufacturing method in which a sheathed heater is constructed by filling a heat-resistant insulating powder into the cavity of the inner cavity of the metal tube, and then drawing the metal tube.
上記の如き製造方法によれば、ヒータ線が取付部材との
溶接端近傍にコイル状または波状に形成されており、長
さ方向にゆとりがあるので、金属チューブの絞り加工に
際してヒータ線と取付部材との接合部への応力が吸収さ
れるので断線を生ずるおそれを回避することができる。According to the manufacturing method described above, the heater wire is formed in a coiled or wavy shape near the welded end with the mounting member, and there is some slack in the length direction, so when drawing the metal tube, the heater wire and the mounting member are Since the stress on the joint with the wire is absorbed, the risk of wire breakage can be avoided.
第１図は本発明によるシーズヒータの製造方法の実施例
を説明するための絞り加工前のシーズヒータの断面図で
あり、ヒータ綿１の両端部にはコイル状部１−１が形成
されており、該ヒータ綿１の両端末をそれぞれ中軸とな
る取付部材２の端末に溶接されて接合部５が形成されて
いる。この接合されたヒータｖＡ１及び取付部材の端部
側を金属チューブ３の内腔に挿入配置して、金属チュー
ブ３の内腔空隙にマグネシア等の耐熱性絶縁材粉末４を
充填する。そして金属チューブ３の外周を一方の端から
順次絞り加工して所要のシーズヒータが得られた。FIG. 1 is a sectional view of a sheathed heater before drawing for explaining an embodiment of the sheathed heater manufacturing method according to the present invention, in which coiled portions 1-1 are formed at both ends of heater cotton 1. Both ends of the heater cotton 1 are welded to the ends of the mounting member 2, which serves as the center shaft, to form a joint 5. The end portions of the joined heater vA1 and the attachment member are inserted into the inner cavity of the metal tube 3, and the inner cavity of the metal tube 3 is filled with heat-resistant insulating material powder 4 such as magnesia. Then, the outer periphery of the metal tube 3 was drawn sequentially from one end to obtain the desired sheathed heater.
第２図は、更に他の実施例を示すもので、シーズ型グロ
ープラグに用いられるシーズヒータの断面図を示す。同
図において、ヒータ線１の両端はコイル状に形成され、
その一端は中軸となる取付部材２に溶接により接合され
、また他端は鋲状金属片からなる取付部材６に溶接によ
り接合され、それぞれ接合部５が形成されている。これ
らの組立体を金属チュブ３の内腔に挿入配置して鋲状金
属片６と金属チュブ３とを溶接により接合して接合部７
が形成され、金属チュブ３の内腔空隙に耐熱性絶縁材粉
末４を充填して、金属チューブ３の外周を先端側から順
次絞り加工して所要のシーズヒータが得られた。FIG. 2 shows still another embodiment, and shows a sectional view of a sheathed heater used in a sheathed glow plug. In the figure, both ends of the heater wire 1 are formed into a coil shape,
One end thereof is joined by welding to a mounting member 2 serving as a center shaft, and the other end is joined by welding to a mounting member 6 made of a rivet-like metal piece, forming a joint portion 5 in each case. These assemblies are inserted into the inner cavity of the metal tube 3, and the stud-like metal piece 6 and the metal tube 3 are joined by welding to form a joint 7.
was formed, the inner cavity of the metal tube 3 was filled with heat-resistant insulating powder 4, and the outer periphery of the metal tube 3 was sequentially drawn from the tip side to obtain the desired sheathed heater.
上記の第１図及び第２図による実施例において絞り加工
してもヒータ線及びその接合部に断線の発生は認められ
なかった。In the examples shown in FIGS. 1 and 2 above, no breakage was observed in the heater wires or their joints even after the drawing process.
本発明のシーズヒータの製造方法によれば、ヒータ線が
コイル状または波状に形成されて、長さ方向にゆとりが
あるために、金属チューブの絞り加工に際してヒータ線
と取付部材との接合部に加わる応力が吸収されるので、
接合部において断線することがなく歩留まりが向上して
生産性が良くなる。According to the sheathed heater manufacturing method of the present invention, since the heater wire is formed in a coiled or wavy shape and has some slack in the length direction, the joint portion between the heater wire and the mounting member is formed when drawing the metal tube. Since the added stress is absorbed,
There is no wire breakage at the joint, which improves yield and productivity.
第１図及び第２図は本発明によるシーズヒータの製造方
法の実施例を説明する絞り加工前のシーズヒータの縦断
面図、第３図は従来のシーズヒータの製造方法を説明す
るための断面図である。
１：ヒータ線、２：取付部材、３：金属チューブ、４：
耐熱性絶縁材粉末、５：接合部。1 and 2 are longitudinal cross-sectional views of a sheathed heater before drawing to explain an embodiment of the method for manufacturing a sheathed heater according to the present invention, and FIG. 3 is a cross-sectional view for explaining a conventional method for manufacturing a sheathed heater. It is a diagram. 1: Heater wire, 2: Mounting member, 3: Metal tube, 4:
Heat-resistant insulating material powder, 5: Joint part.
Claims (1)
波状に形成してなるヒータ線の端部の取付部材に溶接し
、ヒータ線を溶接部分を含んで金属チューブ内に挿入配
置し、該金属チューブ内腔の空隙部に耐熱性絶縁材粉末
を充填してのち、上記金属チューブを絞り加工して金属
チューブ内を緻密に形成することを特徴とするシーズヒ
ータの製造方法。1. Weld the end of a substantially straight heater wire to a mounting member for the end of a coiled or wavy heater wire, insert the heater wire including the welded portion into a metal tube, and 1. A method for manufacturing a sheathed heater, which comprises filling a cavity in an inner cavity of a metal tube with heat-resistant insulating powder, and then drawing the metal tube to form a dense interior of the metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11258990A JPH0412489A (en) | 1990-04-27 | 1990-04-27 | Manufacture of sheath heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11258990A JPH0412489A (en) | 1990-04-27 | 1990-04-27 | Manufacture of sheath heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0412489A true JPH0412489A (en) | 1992-01-17 |
Family
ID=14590525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11258990A Pending JPH0412489A (en) | 1990-04-27 | 1990-04-27 | Manufacture of sheath heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0412489A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003007313A3 (en) * | 2001-07-03 | 2003-08-21 | Cci Thermal Technologies Inc | Corrugated metal ribbon heating element |
| EP3453963A1 (en) | 2017-09-06 | 2019-03-13 | NGK Spark Plug Co., Ltd. | Glow plug |
-
1990
- 1990-04-27 JP JP11258990A patent/JPH0412489A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003007313A3 (en) * | 2001-07-03 | 2003-08-21 | Cci Thermal Technologies Inc | Corrugated metal ribbon heating element |
| EP3453963A1 (en) | 2017-09-06 | 2019-03-13 | NGK Spark Plug Co., Ltd. | Glow plug |
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