JPS5568148A - Closed forging method of crankshaft - Google Patents
Closed forging method of crankshaftInfo
- Publication number
- JPS5568148A JPS5568148A JP14019778A JP14019778A JPS5568148A JP S5568148 A JPS5568148 A JP S5568148A JP 14019778 A JP14019778 A JP 14019778A JP 14019778 A JP14019778 A JP 14019778A JP S5568148 A JPS5568148 A JP S5568148A
- Authority
- JP
- Japan
- Prior art keywords
- dies
- die
- punches
- commanded
- pressing
- 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
Landscapes
- Forging (AREA)
Abstract
PURPOSE: To execute flash-free forging by letting the punches whose ends are of crankpin molding dies enter the material of the closed dies.
CONSTITUTION: The pre-formed material 1 is supplied between opened dies 3, 3', at which time punches 5', 5 are held vertically expanded. Next, when pressing is commanded to an outer press 9, the die 3' descends while holding the punch 3' and the dies 3 contact and stop with each other at the die parting face. At this time arrangement is so made that the material 1 accommodates in the die cavity and does not extrude to the die parting face. Then, when pressing is commanded to an inner press 10 and lower press 11, the punches 5', 5 advance while forcing aside the materiallc portion and are held in the dies at the punch ends. The remained material becomes crankpins 2c and the material having been forced aside fills the die cavity by making up the material insufficiency such of crankarm 2, crankshafts 2a, 2f, etc. This method eliminates the need for extraordinary screw-down force and improves yield as well.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14019778A JPS5568148A (en) | 1978-11-13 | 1978-11-13 | Closed forging method of crankshaft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14019778A JPS5568148A (en) | 1978-11-13 | 1978-11-13 | Closed forging method of crankshaft |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5568148A true JPS5568148A (en) | 1980-05-22 |
JPS6141652B2 JPS6141652B2 (en) | 1986-09-17 |
Family
ID=15263161
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14019778A Granted JPS5568148A (en) | 1978-11-13 | 1978-11-13 | Closed forging method of crankshaft |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5568148A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5768239A (en) * | 1980-10-11 | 1982-04-26 | Kobe Steel Ltd | Manufacturing device of crank arm for welded crank shaft |
JPS60174231A (en) * | 1984-02-21 | 1985-09-07 | Sumitomo Heavy Ind Ltd | Machine hydraulic pressure type double-acting press |
JPS62123340U (en) * | 1986-12-04 | 1987-08-05 | ||
DE102007002826A1 (en) * | 2007-01-19 | 2008-07-31 | Audi Ag | Crank shaft forging or casting method for motor vehicle, involves implementing forging or casting process in shaft such that section of material joint of shaft runs outside level, in which axis of shaft lies |
CN101823116A (en) * | 2010-05-11 | 2010-09-08 | 林素伟 | Forging process for engine crankshaft of excavator |
DE112005002861B4 (en) | 2004-11-23 | 2023-08-10 | Scania Cv Ab | Crankshaft, internal combustion engine and method of manufacturing a crankshaft |
-
1978
- 1978-11-13 JP JP14019778A patent/JPS5568148A/en active Granted
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5768239A (en) * | 1980-10-11 | 1982-04-26 | Kobe Steel Ltd | Manufacturing device of crank arm for welded crank shaft |
JPS60174231A (en) * | 1984-02-21 | 1985-09-07 | Sumitomo Heavy Ind Ltd | Machine hydraulic pressure type double-acting press |
JPH0478379B2 (en) * | 1984-02-21 | 1992-12-11 | Sumitomo Heavy Industries | |
JPS62123340U (en) * | 1986-12-04 | 1987-08-05 | ||
DE112005002861B4 (en) | 2004-11-23 | 2023-08-10 | Scania Cv Ab | Crankshaft, internal combustion engine and method of manufacturing a crankshaft |
DE102007002826A1 (en) * | 2007-01-19 | 2008-07-31 | Audi Ag | Crank shaft forging or casting method for motor vehicle, involves implementing forging or casting process in shaft such that section of material joint of shaft runs outside level, in which axis of shaft lies |
DE102007002826B4 (en) * | 2007-01-19 | 2008-10-30 | Audi Ag | A method for forging or casting a shaft, as well as a forged or cast shaft |
CN101823116A (en) * | 2010-05-11 | 2010-09-08 | 林素伟 | Forging process for engine crankshaft of excavator |
Also Published As
Publication number | Publication date |
---|---|
JPS6141652B2 (en) | 1986-09-17 |
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