JPS6418543A - Forging stock for crank throw and its forming method - Google Patents
Forging stock for crank throw and its forming methodInfo
- Publication number
- JPS6418543A JPS6418543A JP17531987A JP17531987A JPS6418543A JP S6418543 A JPS6418543 A JP S6418543A JP 17531987 A JP17531987 A JP 17531987A JP 17531987 A JP17531987 A JP 17531987A JP S6418543 A JPS6418543 A JP S6418543A
- Authority
- JP
- Japan
- Prior art keywords
- stock
- crank throw
- taper
- journal
- pin
- 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
Abstract
PURPOSE:To easily manufacture forging stock for a crank throw free from lack of fill by swaging in taper a pin part in the central contracted part of a round column stock and forming both axial ends by a special tool into an egg-shaped flange. CONSTITUTION:An insert die 21 fitted to the central contracted part of the round column stock is supported by a fixed ring 22 and a casing 23. The pin part 4 and a taper part 3 are swaged and formed by compression of a compression anvil 26 in an axial direction. Flange parts 2 are swaged and formed on both axial ends of the column stock 20 by one set of an upper and a lower control tool 24 having a die surface 24a controlling the external circumferential surface nearly in an egg shape and the compression anvil 26 having a recess part 25 to form a journal part 5. In this method the forging stock for the crank throw is obtained where the flange part 2 nearly in an egg shape having a narrow part 6 on the journal shaft side and a wide part 7 on the pin shaft side is connected with the taper part 3 and the journal part 5 is deviated against the center of the pin shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17531987A JPS6418543A (en) | 1987-07-14 | 1987-07-14 | Forging stock for crank throw and its forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17531987A JPS6418543A (en) | 1987-07-14 | 1987-07-14 | Forging stock for crank throw and its forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6418543A true JPS6418543A (en) | 1989-01-23 |
Family
ID=15994007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17531987A Pending JPS6418543A (en) | 1987-07-14 | 1987-07-14 | Forging stock for crank throw and its forming method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6418543A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002078875A1 (en) * | 2001-03-29 | 2002-10-10 | Showa Denko K.K. | Closed forging metod, forging production system using the method, forging die used in the method and system, and preform or yoke produced by the method and system |
| CN1298455C (en) * | 2001-03-29 | 2007-02-07 | 昭和电工株式会社 | Closed forging method, forging prodn. system using method, forging die used in method and system, and preform or yoke produced by method and system |
-
1987
- 1987-07-14 JP JP17531987A patent/JPS6418543A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002078875A1 (en) * | 2001-03-29 | 2002-10-10 | Showa Denko K.K. | Closed forging metod, forging production system using the method, forging die used in the method and system, and preform or yoke produced by the method and system |
| CN1298455C (en) * | 2001-03-29 | 2007-02-07 | 昭和电工株式会社 | Closed forging method, forging prodn. system using method, forging die used in method and system, and preform or yoke produced by method and system |
| US7257981B2 (en) * | 2001-03-29 | 2007-08-21 | Showa Denko K.K. | Closed forging method, forging production system using the method, forging die used in the method and system, and preform or yoke produced by the method and system |
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