JPS56119338A - Forming method for tapered fitting hole - Google Patents
Forming method for tapered fitting holeInfo
- Publication number
- JPS56119338A JPS56119338A JP1942280A JP1942280A JPS56119338A JP S56119338 A JPS56119338 A JP S56119338A JP 1942280 A JP1942280 A JP 1942280A JP 1942280 A JP1942280 A JP 1942280A JP S56119338 A JPS56119338 A JP S56119338A
- Authority
- JP
- Japan
- Prior art keywords
- tapered hole
- hole portion
- tapered
- fitting hole
- cavities
- 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
- Forging (AREA)
Abstract
PURPOSE: To simplify the work for forming the tapered fitting hole for a motor vehicle or the like by absorbing the excess thickness of the tapered hole portion which is produced in cold forging into cavities provided in the tapered hole inner surface.
CONSTITUTION: Axial cavities 8 are formed at several portions in the surface of the tapered hole portion on the taper receiving side by piercing using a press. Then, said tapered hole portion is cold-forged to expand into desired dimensions. The excess thickness produced on doing this is absorbed into the cavities 8. Accordingly, a stable tapered hole portion with highly accurate dimensions can be obtained by only cold forging using a taper punch or the like.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1942280A JPS56119338A (en) | 1980-02-19 | 1980-02-19 | Forming method for tapered fitting hole |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1942280A JPS56119338A (en) | 1980-02-19 | 1980-02-19 | Forming method for tapered fitting hole |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56119338A true JPS56119338A (en) | 1981-09-18 |
Family
ID=11998819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1942280A Pending JPS56119338A (en) | 1980-02-19 | 1980-02-19 | Forming method for tapered fitting hole |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56119338A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05317349A (en) * | 1992-03-17 | 1993-12-03 | Kiyomi Sukizaki | Male contraceptive |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS508990A (en) * | 1973-05-31 | 1975-01-29 |
-
1980
- 1980-02-19 JP JP1942280A patent/JPS56119338A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS508990A (en) * | 1973-05-31 | 1975-01-29 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05317349A (en) * | 1992-03-17 | 1993-12-03 | Kiyomi Sukizaki | Male contraceptive |
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