JPH03267615A - Manufacture of heating cylinder in heating plug for diesel engine - Google Patents
Manufacture of heating cylinder in heating plug for diesel engineInfo
- Publication number
- JPH03267615A JPH03267615A JP6575290A JP6575290A JPH03267615A JP H03267615 A JPH03267615 A JP H03267615A JP 6575290 A JP6575290 A JP 6575290A JP 6575290 A JP6575290 A JP 6575290A JP H03267615 A JPH03267615 A JP H03267615A
- Authority
- JP
- Japan
- Prior art keywords
- tip
- pipe material
- thickness
- opening
- heating
- 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
- 238000010438 heat treatment Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 229910001026 inconel Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ディーゼルエンジンの始動を確実且つ容易と
すべくディーゼルエンジンに装着されて、その圧縮空気
を予熱せしめられるようにした加熱プラグの先端部分に
位置し、その内部にヒートコイルが内装されるディーゼ
ルエンジン用加熱プラグに於ける加熱筒の製造方法に関
する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a heating plug that is attached to a diesel engine in order to ensure and easily start the diesel engine, and is capable of preheating compressed air. The present invention relates to a method of manufacturing a heating cylinder for a heating plug for a diesel engine, in which a heating coil is installed inside the heating plug.
（従来の技術）
従来、ディーゼルエンジン用加熱プラグの加熱筒は、耐
熱合金製（例えば、インコネル等）パイプ材の先端部分
にスェージング加工を施すことによりある程度先端部分
を窄め、この先端部分に、別部材により予め略円錐筒状
に形成された先端構成部材を溶接手段によって接続し、
更に、先端構成部材の先端開口部分を溶接手段によって
閉塞して構成していた。(Prior Art) Conventionally, the heating tube of a heating plug for a diesel engine is made of a heat-resistant alloy (for example, Inconel, etc.) pipe material, and the tip is narrowed to some extent by swaging the tip, and the tip is A tip component member previously formed into a substantially conical tube shape by a separate member is connected by welding means,
Furthermore, the tip opening portion of the tip component member is closed by welding means.
（発明が解決しようとする課題）
そのため、構成部材が多く、溶接箇所も多くなり、その
製造が面倒となると共にコスト高となる等の難点もあっ
た。(Problems to be Solved by the Invention) Therefore, there are many constituent members and many welding points, which makes manufacturing complicated and increases costs.
また、スェージング加工により形成された加熱筒は、先
端部分の肉厚が不均一になり易い難点や、寸法精度の高
い加工が施し難い難点等を有していた。Further, the heating cylinder formed by swaging processing has the disadvantage that the thickness of the tip portion tends to be uneven, and the disadvantage that it is difficult to perform processing with high dimensional accuracy.
（課題を解決するための手段）
そこで、本発明は、前述の如き難点の解消を図り、加熱
筒の製造がより簡単に行えるようにすること等を目的と
し、この目的を達成すべく、適宜耐熱合金で所定寸法の
円筒状パイプ素材１を形成し、このパイプ素材１の先端
部１ａに、絞り加工を施して、先端部１ａの周壁部分が
若干内側に突出するような段部３を周設し、この先端部
１ａの段部３に複数工程からなる絞り加工を段階的に施
して、段部３の突出状態を段階的に大きくすると共に、
先端開口２を漸次小さくし、ポンチ先端周縁部分が段部
３に係止するようにしてパイプ素材１の先端部１ａ周壁
部分に複数工程からなる絞り加工を段階的に施して、段
部３が外がゎに向って湾出するように段階的にその湾曲
状態を大きくすると共に、先端開口２を漸次小さくし、
絞り加工でパイプ素材１の先端開口２を所定寸法に窄め
た後、絞り加工で先端部１ａの肉厚等を均一に修正する
と共に、絞り加工で基体部１ｂの肉厚等を均一に修正す
る手段を採用した。(Means for Solving the Problems) Therefore, an object of the present invention is to solve the above-mentioned difficulties and to make it easier to manufacture a heating cylinder. A cylindrical pipe material 1 of a predetermined size is formed from a heat-resistant alloy, and the tip 1a of the pipe material 1 is drawn to form a stepped portion 3 such that the peripheral wall portion of the tip 1a slightly protrudes inward. The stepped portion 3 of the tip portion 1a is subjected to a drawing process consisting of multiple steps in stages to increase the protrusion state of the stepped portion 3 in stages,
The tip opening 2 is gradually made smaller, and the circumferential wall portion of the tip portion 1a of the pipe material 1 is subjected to a drawing process consisting of multiple steps in stages such that the peripheral edge portion of the punch tip is locked to the step portion 3, thereby forming the step portion 3. Gradually increase the curved state so that the outside curves toward ゎ, and gradually reduce the tip opening 2,
After narrowing the tip opening 2 of the pipe material 1 to a predetermined size by drawing, the thickness of the tip 1a is corrected uniformly by the drawing process, and the thickness etc. of the base portion 1b is corrected uniformly by the drawing process. A method was adopted to do so.
（作用）
しかして、耐熱合金製パイプ素材１の先端部１ａの周壁
部分は、複数工程からなる絞り加工によって段階的に漸
次窄められ、その先端開口２が所定寸法に窄められたと
きは、絞り加工によって先端部１ａの肉厚等が均一に修
正されると共に、基体部１ｂの肉厚等が均一に修正され
る。(Function) Therefore, the peripheral wall portion of the tip 1a of the heat-resistant alloy pipe material 1 is gradually narrowed in stages by a drawing process consisting of multiple steps, and when the tip opening 2 is narrowed to a predetermined size. By drawing, the thickness, etc. of the tip portion 1a is corrected to be uniform, and the thickness, etc. of the base portion 1b is corrected to be uniform.
（実施例） 以下、本発明を図示例について説明する。(Example) Hereinafter, the present invention will be explained with reference to illustrated examples.
先ず、インコネル等の耐熱合金で所定寸法（例えば、直
径が約６ｍｍのパイプ材を利用する。）の円筒状パイプ
素材１（図 （＾）参照）を形成し、このパイプ素材１
の先端部１ａの周壁部分に、絞り加工を施して、先端部
１ａの周壁部分が両心に向って若干内側に突出するよう
な段部３を周設する（図 （Ｂ）参照）。First, a cylindrical pipe material 1 (see figure (^)) of a predetermined size (for example, a pipe material with a diameter of about 6 mm is used) is formed from a heat-resistant alloy such as Inconel, and this pipe material 1 is
The circumferential wall portion of the distal end portion 1a is drawn to form a stepped portion 3 such that the circumferential wall portion of the distal end portion 1a slightly protrudes inward toward both centers (see Figure (B)).
更に、このパイプ素材１先端部１ａの周壁部分に複数工
程からなる絞り加工を段階的に施し、段部３の突出状態
を段階的に大きくして、先端開口２を漸次小さくする（
図 （Ｃ）、 （ＤＪ、参照）。Further, the peripheral wall portion of the tip portion 1a of the pipe material 1 is subjected to a drawing process consisting of multiple steps in stages, so that the protruding state of the step portion 3 is gradually increased, and the tip opening 2 is gradually made smaller (
Figure (C), (see DJ).
次に、ポンチ先端周縁部分が段部３に係止するようにし
てパイプ素材１先端部１ａの周壁部分に複数工程からな
る絞り加工を段階的に施し、段部３が外がわに向って湾
出するように段階的にその湾曲状態を大きくすると共に
、先端開口２を漸次小さくする（図 （Ｅｌ、 （Ｆｌ
、 （ＧＪ参照）。Next, the circumferential wall of the tip 1a of the pipe material 1 is subjected to a drawing process consisting of multiple steps in stages so that the peripheral edge of the punch tip is locked to the step 3, so that the step 3 is turned outward. The curved state is gradually increased so that it curves out, and the tip opening 2 is gradually reduced (Figures (El, (Fl)
, (see GJ).
そして、絞り加工でパイプ素材１先端部１ａの先端開口
２を所定寸法（例えば、直径を約１ｍとする）に窄めた
後（図 （旧参照）、絞り加工でパイプ素材１の先端部
１ａの肉厚を均一にすると共に、各部を所定寸法に修正
しく図 （１）参照）、更に、絞り加工でパイプ素材１
の基体部１ｂの肉厚を均一にすると共に、各部を所定寸
法に修正する（図 （ｊ）参照）。After narrowing the tip opening 2 of the tip 1a of the pipe material 1 to a predetermined size (for example, about 1 m in diameter) by drawing (see Figure (old)), the tip 1a of the pipe material 1 is drawn by drawing. In addition to making the wall thickness uniform, each part is adjusted to the specified dimensions (see figure (1)), and then the pipe material 1 is drawn.
The thickness of the base portion 1b is made uniform, and each part is adjusted to the predetermined dimensions (see Figure (j)).
それから、先端開口２を溶接して、その溶接閉塞部４で
もって先端開口２を閉塞する（図 （Ｋ）参照）。Then, the tip opening 2 is welded, and the tip opening 2 is closed with the welded closing portion 4 (see Figure (K)).
更に、閉塞されたパイプ素材１の先端部分を適宜形状に
成形せしめて、ディーゼルエンジン用加熱プラグＰの加
熱筒Ｐ１が構成される（図 （Ｌ）参照）。Furthermore, the distal end portion of the closed pipe material 1 is formed into an appropriate shape to form the heating cylinder P1 of the heating plug P for a diesel engine (see Figure (L)).
ところで、図 （Ｂ）から図 （Ｊ）までの工程は、順
送り加工によって行われるもので、図 （Ｂｌ乃至図（
Ｊ）に対応するポンチとダイス夫々によって加工が連続
的に行われ、加熱筒Ｐ１を形成する際の製造能率の向上
が図られている。By the way, the processes from Figure (B) to Figure (J) are performed by progressive machining, and are shown in Figures (Bl to (J)).
Processing is performed continuously using punches and dies corresponding to J), thereby improving manufacturing efficiency when forming the heating cylinder P1.
図中５は、前述の如く構成される加熱筒Ｐ１に内装され
るニクロム線等のヒートコイルで、６は、加熱筒Ｐ１に
充填されるマグネシア等の耐熱性絶縁粉末である。In the figure, 5 is a heating coil such as nichrome wire that is housed in the heating cylinder P1 constructed as described above, and 6 is a heat-resistant insulating powder such as magnesia that is filled in the heating cylinder P1.
尚、パイプ素材１の形状、寸法、材質、先端開口２が所
定寸法に窄められるまでの具体的工程数や、工程途中に
於ける具体的形状等については、図示例のものに限定さ
れることなく適宜自由に設定できる。In addition, the shape, dimensions, material of the pipe material 1, the specific number of steps until the tip opening 2 is narrowed to a predetermined size, the specific shape during the process, etc. are limited to the illustrated example. You can freely set it as you like.
（発明の効果）
従って、本発明の方法は、適宜耐熱合金で所定寸法の円
筒状パイプ素材１を形成し、このｌくイブ素材１の先端
部１ａに、絞り加工を施して、先端部１ａの周壁部分が
若干内側に突出するような段部３を周設し、この先端部
１ａの段部３に複数工程からなる絞り加工を段階的に施
して、段部３の突出状態を段階的に大きくすると共に、
先端開口２を漸次小さくし、ポンチ先端周縁部分が段部
３に係止するようにしてパイプ素材１の先端部１ａ周壁
部分に複数工程からなる絞り加工を段階的に施して、段
部３が外がわに向って湾出するように段階的にその湾曲
状態を大きくすると共に、先端開口２を漸次小さくし、
絞り加工でパイプ素材１の先端開口２を所定寸法に窄め
た後、絞り加工で先端部１ａの肉厚等を均一に修正する
と共に、絞り加工で基体部１ｂの肉厚等を均一に修正す
るので、加熱筒Ｐ１の先端部分の加工が非常に簡単に行
えるようになると共に、肉厚が均一で寸法精實の高い加
熱筒Ｐ１を形成できるようになり、不良品の発生を抑制
できる加工が施せるようになる。(Effects of the Invention) Therefore, in the method of the present invention, a cylindrical pipe material 1 of a predetermined size is formed from an appropriate heat-resistant alloy, and the tip portion 1a of the pipe material 1 is drawn. A stepped portion 3 is provided around the edge of the tip portion 1a so that the peripheral wall portion thereof slightly protrudes inward, and the stepped portion 3 of the tip portion 1a is subjected to a drawing process consisting of multiple steps in stages to gradually change the protruding state of the stepped portion 3. In addition to increasing the size,
The tip opening 2 is gradually made smaller, and the circumferential wall portion of the tip portion 1a of the pipe material 1 is subjected to a drawing process consisting of multiple steps in stages such that the peripheral edge portion of the punch tip is locked to the step portion 3, thereby forming the step portion 3. The curved state is gradually increased so as to curve outward, and the tip opening 2 is gradually made smaller.
After narrowing the tip opening 2 of the pipe material 1 to a predetermined size by drawing, the thickness of the tip 1a is corrected uniformly by the drawing process, and the thickness etc. of the base portion 1b is corrected uniformly by the drawing process. As a result, the tip of the heating cylinder P1 can be processed very easily, and the heating cylinder P1 with uniform wall thickness and high dimensional accuracy can be formed, making it possible to suppress the occurrence of defective products. will be able to be applied.
しかも、構成部材が少なくて済むと共に、溶接箇所も少
なくて済み、加熱筒Ｐ１を容易に製造できるようになり
、しかも、作業能率が向上し、量産に適し、製造コスト
の低減が図れるようになる。Moreover, the number of structural members and welding points are reduced, making it easier to manufacture the heating cylinder P1, improving work efficiency, making it suitable for mass production, and reducing manufacturing costs. .
ところで、耐熱合金製パイプ素材１先端部１ａの周壁部
分に複数工程からなる絞り加工を段階的に施し、パイプ
素材１の先端開口２を段階的に漸次窄める工程を、順送
り加工によって行うことで、絞り加工を連続的に行える
ようになり、加熱筒Ｐ１を形成する際の製造能率を一段
と向上せしめることができるようになる。By the way, the peripheral wall portion of the tip portion 1a of the heat-resistant alloy pipe material 1 is subjected to a drawing process consisting of multiple steps in stages, and the step of gradually narrowing the tip opening 2 of the pipe material 1 is performed by progressive processing. Therefore, the drawing process can be performed continuously, and the manufacturing efficiency when forming the heating cylinder P1 can be further improved.
図面は、本発明を例示するもので、第１図はパイプ素材
から加熱筒が形成されるまでの工程を示す部分縦断面図
、第２図はディーゼルエンジン用加熱プラグの一部切欠
正面図である。
１・・・パイプ素材、１ａ・・・先端部、１ｂ・・・基
体部、２・・・先端開口、３・・・段部、４・・・溶接
閉塞部、５・・・ヒートコイル、６・・・耐熱性絶縁粉
末、Ｐ・・・ディーゼルエンジン用加熱プラグ、Ｐｌ・
・・加熱筒。
＠２図
特 許
出
願 人
有限会社 渡邊プレス製作所
１
ビThe drawings illustrate the present invention; Fig. 1 is a partial vertical sectional view showing the process from pipe material to formation of a heating cylinder, and Fig. 2 is a partially cutaway front view of a heating plug for a diesel engine. be. DESCRIPTION OF SYMBOLS 1... Pipe material, 1a... Tip part, 1b... Base part, 2... Tip opening, 3... Step part, 4... Welding closed part, 5... Heat coil, 6...Heat-resistant insulating powder, P...Heating plug for diesel engine, Pl.
・Heating tube. @2 drawing patent application Watanabe Press Seisakusho 1 B
Claims (1)
し、このパイプ素材の先端部に、絞り加工を施して、先
端部の周壁部分が若干内側に突出するような段部を周設
し、この先端部の段部に複数工程からなる絞り加工を段
階的に施して、段部の突出状態を段階的に大きくすると
共に、先端開口を漸次小さくし、ポンチ先端周縁部分が
段部に係止するようにしてパイプ素材の先端部周壁部分
に複数工程からなる絞り加工を段階的に施して、段部が
外がわに向って湾出するように段階的にその湾曲状態を
大きくすると共に、先端開口を漸次小さくし、絞り加工
でパイプ素材の先端開口を所定寸法に窄めた後、絞り加
工で先端部の肉厚等を均一に修正すると共に、絞り加工
で基体部の肉厚等を均一に修正することを特徴としたデ
ィーゼルエンジン用加熱プラグに於ける加熱筒の製造方
法。1. Form a cylindrical pipe material of a predetermined size from an appropriate heat-resistant alloy, and apply a drawing process to the tip of this pipe material to create a step around the tip so that the peripheral wall portion of the tip slightly protrudes inward. The stepped portion of the tip is subjected to a drawing process consisting of multiple steps in stages, so that the protruding state of the stepped portion is gradually increased, and the tip opening is gradually made smaller, so that the peripheral edge of the punch tip engages with the stepped portion. A drawing process consisting of multiple steps is applied to the peripheral wall of the tip end of the pipe material in stages so that the step part curves outward, and the curved state is gradually increased. , the tip opening is gradually made smaller, and after narrowing the tip opening of the pipe material to a predetermined size by drawing, the thickness of the tip is corrected uniformly by drawing, and the thickness of the base is adjusted by drawing. A method for manufacturing a heating tube in a heating plug for a diesel engine, which is characterized by uniformly correcting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6575290A JPH03267615A (en) | 1990-03-16 | 1990-03-16 | Manufacture of heating cylinder in heating plug for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6575290A JPH03267615A (en) | 1990-03-16 | 1990-03-16 | Manufacture of heating cylinder in heating plug for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03267615A true JPH03267615A (en) | 1991-11-28 |
Family
ID=13296070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6575290A Pending JPH03267615A (en) | 1990-03-16 | 1990-03-16 | Manufacture of heating cylinder in heating plug for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03267615A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010164242A (en) * | 2009-01-15 | 2010-07-29 | Ngk Spark Plug Co Ltd | Method of manufacturing heater tube for glow plug and the glow plug |
| JP2010249354A (en) * | 2009-04-13 | 2010-11-04 | Bosch Corp | Sheath manufacturing method of metal glow plug for diesel engine, manufacturing method of metal glow plug, sheath of metal glow plug for diesel engine, and metal glow plug for diesel engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6396420A (en) * | 1986-10-13 | 1988-04-27 | Jidosha Kiki Co Ltd | Manufacture of glow plug for diesel engine |
| JPS63147695A (en) * | 1986-12-11 | 1988-06-20 | 有限会社 渡邊プレス製作所 | Manufacture of ink cylinder made of metal such as ball pen |
-
1990
- 1990-03-16 JP JP6575290A patent/JPH03267615A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6396420A (en) * | 1986-10-13 | 1988-04-27 | Jidosha Kiki Co Ltd | Manufacture of glow plug for diesel engine |
| JPS63147695A (en) * | 1986-12-11 | 1988-06-20 | 有限会社 渡邊プレス製作所 | Manufacture of ink cylinder made of metal such as ball pen |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010164242A (en) * | 2009-01-15 | 2010-07-29 | Ngk Spark Plug Co Ltd | Method of manufacturing heater tube for glow plug and the glow plug |
| EP2208930A3 (en) * | 2009-01-15 | 2018-01-24 | NGK Spark Plug Co., Ltd. | Manufacturing method of heater tube of glow plug and glow plug |
| JP2010249354A (en) * | 2009-04-13 | 2010-11-04 | Bosch Corp | Sheath manufacturing method of metal glow plug for diesel engine, manufacturing method of metal glow plug, sheath of metal glow plug for diesel engine, and metal glow plug for diesel engine |
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