JPS62192226A - Manufacture of hollow screw - Google Patents
Manufacture of hollow screwInfo
- Publication number
- JPS62192226A JPS62192226A JP3235886A JP3235886A JPS62192226A JP S62192226 A JPS62192226 A JP S62192226A JP 3235886 A JP3235886 A JP 3235886A JP 3235886 A JP3235886 A JP 3235886A JP S62192226 A JPS62192226 A JP S62192226A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- hollow
- thread
- forming part
- forging
- 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 description 5
- 239000002184 metal Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000005242 forging Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は中空ネジの製造方法に関するものである。[Detailed description of the invention] [Industrial application field] This invention relates to a method for manufacturing a hollow screw.
［従来の技術］
従来の中空ネジの製造方法としては、自動機による切削
、ダイスによる切削、または転造ダイスと芯金とを使用
した転造加工がある。[Prior Art] Conventional methods for producing hollow screws include cutting with an automatic machine, cutting with a die, or rolling using a rolling die and a core metal.
［発明が解決しようとする問題点］
従来技術において、切削による加工は時間がかかり、ま
た転造ダイスと芯金による転造加工の場合は自動化が難
しく、いずれの方法によっても量産性に問題があり、加
工コストがかかっていた。[Problems to be solved by the invention] In the conventional technology, processing by cutting takes time, and rolling processing using a rolling die and core metal is difficult to automate, and any method poses problems in mass production. Yes, there were processing costs.
［発明が解決しようとする問題点］
この発明は上記従来における欠点を解決するものであり
、中空ネジのネジ溝を鍛造加工により形成するものであ
る。[Problems to be Solved by the Invention] The present invention solves the above-mentioned conventional drawbacks, and forms the thread groove of the hollow screw by forging.
［実施例］
板材から絞り加工で中空部材１を作る。この中空部材１
にはフランジ２、中空穴３が形成され、その軸部４には
ネジ形成用部分５と、ネジ非形成部分６がそれぞれ対向
位置に形成されている。このネジ非形成部分６を設けて
いるのは、もし軸部４の外周の全部にネジを形成すると
、一対の成形ダイで鍛造したとき、つなぎ部分にパリが
発生する場合があるので、このパリが発生するところに
ネジが形成されないようにしたものである。このネジ非
形成部分６の中央部６ａの肉厚がもっとも薄い部分は将
来ネジが形成された場合の谷径よりも内側にくるように
しておく。すなわちネジ非形成部分６の中心から軸心ま
での長さｍを、ネジの谷径ｒより小さくしておく。これ
はネジ非形成部分は鍛造による影響でわずかに変形して
脹み、相手方のナツトなどのネジ穴のネジ山と当ること
を防ぐためである。この中空部材１の中空穴３に芯金７
を挿入してセットシ、ネジ成形ダイ８．９で両側より鍛
造加工して軸部４のネジ形成用部分５にネジ山を盛り上
げてネジ部を形成する。[Example] A hollow member 1 is made from a plate material by drawing. This hollow member 1
A flange 2 and a hollow hole 3 are formed in the shaft portion 4, and a threaded portion 5 and a non-threaded portion 6 are formed in opposing positions, respectively. This non-threaded portion 6 is provided because if a thread is formed on the entire outer periphery of the shaft portion 4, burr may occur at the connecting portion when forged with a pair of forming dies. This prevents the formation of screws in areas where this occurs. The thinnest portion of the central portion 6a of this non-threaded portion 6 is arranged to be located inside the root diameter when a screw is formed in the future. That is, the length m from the center of the non-threaded portion 6 to the axis is made smaller than the root diameter r of the thread. This is to prevent the non-threaded part from being slightly deformed and swollen due to the effects of forging and coming into contact with the threads of the threaded hole of the mating nut. The core metal 7 is inserted into the hollow hole 3 of this hollow member 1.
is inserted, set, and forged from both sides using a thread forming die 8.9 to form a threaded portion by raising a thread on the thread forming portion 5 of the shaft portion 4.
ネジ形成用部分５、ネジ非形成部分６の形状は加工作業
性および作る中空ネジの用途を考慮して適宜の形状にす
ることが可能である。The shapes of the thread-forming portion 5 and the non-thread-forming portion 6 can be made into appropriate shapes in consideration of processing workability and the use of the hollow screw to be made.
たとえば第３図示のように中空部材のネジ形成用部分５
をより少くして必要部分にのみに配置し、ネジ非形成部
分６の肉厚を一定にしてもよい。また第４図示のように
中空穴３を非円形にしてネジ非形成部分６の厚さを一定
としてもよい。For example, as shown in FIG. 3, the thread forming portion 5 of the hollow member
It is also possible to make the thickness of the non-threaded portion 6 constant by reducing the number of screws and disposing it only in necessary areas. Alternatively, as shown in the fourth figure, the hollow hole 3 may be made non-circular and the thickness of the non-threaded portion 6 may be constant.
［発明の効果］
この発明によれば、中空ネジを鍛造で成形できるので加
工が容易であり、量産に適している。[Effects of the Invention] According to the present invention, since the hollow screw can be formed by forging, processing is easy and suitable for mass production.
図面はこの発明の詳細な説明図であり、第１図は正面図
、第２図は第１図■−■線断面図、第３図は中空部材の
他の例を示す正面図、第４図は中空部材のさらに他の例
を示す正面図である。
１・・・中空部材
３・・・中空穴
４・・・軸部
５・・・ネジ形成用部分
６・・・ネジ非形成部分
７・・・芯金
８・・・ネジ成形ダイ
９・・・ネジ成形ダイ。
以上The drawings are detailed explanatory diagrams of the present invention, and FIG. 1 is a front view, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 3 is a front view showing another example of the hollow member, and FIG. The figure is a front view showing still another example of the hollow member. 1... Hollow member 3... Hollow hole 4... Shaft portion 5... Thread forming part 6... Thread non-forming part 7... Core bar 8... Thread forming die 9...・Screw molding die. that's all
Claims (1)
部材を形成し、この中空部材の中空穴に芯金を挿入した
後、ネジ成形ダイにて上記ネジ成形用部分に鍛造でネジ
部分を形成することを特徴とする中空ネジの製造方法。A hollow member having a thread-forming part and a non-thread-forming part is formed in the shaft part, and a core metal is inserted into the hollow hole of this hollow member, and then the thread part is forged into the thread-forming part using a thread forming die. A method for manufacturing a hollow screw, characterized by forming a hollow screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3235886A JPS62192226A (en) | 1986-02-17 | 1986-02-17 | Manufacture of hollow screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3235886A JPS62192226A (en) | 1986-02-17 | 1986-02-17 | Manufacture of hollow screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62192226A true JPS62192226A (en) | 1987-08-22 |
Family
ID=12356731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3235886A Pending JPS62192226A (en) | 1986-02-17 | 1986-02-17 | Manufacture of hollow screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62192226A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017189795A (en) * | 2016-04-13 | 2017-10-19 | 有限会社山内エンジニアリング | Method for processing work-piece, method for manufacturing motor housing, punch set, and work-piece processing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5444257A (en) * | 1977-09-13 | 1979-04-07 | Kanegafuchi Chemical Ind | Laminated heat insulator |
-
1986
- 1986-02-17 JP JP3235886A patent/JPS62192226A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5444257A (en) * | 1977-09-13 | 1979-04-07 | Kanegafuchi Chemical Ind | Laminated heat insulator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017189795A (en) * | 2016-04-13 | 2017-10-19 | 有限会社山内エンジニアリング | Method for processing work-piece, method for manufacturing motor housing, punch set, and work-piece processing device |
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