JPS6431537A - Heading method for hollow part - Google Patents
Heading method for hollow partInfo
- Publication number
- JPS6431537A JPS6431537A JP18863387A JP18863387A JPS6431537A JP S6431537 A JPS6431537 A JP S6431537A JP 18863387 A JP18863387 A JP 18863387A JP 18863387 A JP18863387 A JP 18863387A JP S6431537 A JPS6431537 A JP S6431537A
- Authority
- JP
- Japan
- Prior art keywords
- punch
- hollow
- die
- closed
- hollow hole
- 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.)
- Granted
Links
Abstract
PURPOSE:To shorten the cutting time of a hollow part with circumferential groove by forming a closed hollow hole by front and rear punches on the circular columnar blank of the die inside and punching the hollow hole after forming an outer circular groove with the pressure of a die and sleeve. CONSTITUTION:A 1st closed hollow hole 20a is formed by pressing the circular columnar blank of the inside of a die 25 with a rear punch 25 by a front punch 21. A 2nd closed hollow hole 30b is then formed with the pressing of a front punch 31. The semi-finished part 30 inserted into a rear punch 44 and supported by a front punch 41 is pressed by approaching it by a die 45 and sleeve 42 and the specified external shape with an outer circular groove 55a is formed. The closed part of the opposite hollow holes of this forming part is punched by a front punch 51 to make a hollow part 50. This hollow heading part 50 is formed with the specified outer circular groove, the cutting time thereafter is widely shortened and the material yield is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18863387A JPS6431537A (en) | 1987-07-28 | 1987-07-28 | Heading method for hollow part |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18863387A JPS6431537A (en) | 1987-07-28 | 1987-07-28 | Heading method for hollow part |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6431537A true JPS6431537A (en) | 1989-02-01 |
JPH03140B2 JPH03140B2 (en) | 1991-01-07 |
Family
ID=16227115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18863387A Granted JPS6431537A (en) | 1987-07-28 | 1987-07-28 | Heading method for hollow part |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6431537A (en) |
-
1987
- 1987-07-28 JP JP18863387A patent/JPS6431537A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH03140B2 (en) | 1991-01-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |