JPS55161541A - Closed rough forging method of crankshaft - Google Patents
Closed rough forging method of crankshaftInfo
- Publication number
- JPS55161541A JPS55161541A JP6905779A JP6905779A JPS55161541A JP S55161541 A JPS55161541 A JP S55161541A JP 6905779 A JP6905779 A JP 6905779A JP 6905779 A JP6905779 A JP 6905779A JP S55161541 A JPS55161541 A JP S55161541A
- Authority
- JP
- Japan
- Prior art keywords
- die
- crankshaft
- parts
- punches
- rough
- 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 achieve the realization of flashless forging and the improvement in material yield by forming the rough-forged shape of the crankshaft part having a pair of opposing convex parts to a bar material for crankshaft and moving the excess metal of the crankshaft part to the adjoining crank throw parts.
CONSTITUTION: After punches 5, 5' are spread above and below and a bar material 1 is fed into a lower die 3, presses 9, 9 are pressed, then an upper die 3' lowers while holding the punch 5' and makes close contact with a lower die 3 at the die parting plane. At this time, the sizes of die cavities 4, 4' and the cavity portions at both ends are so made that the material 1 does not extrude to the die parting plane. Next, when a press 10 and lower press 11 are pressed, the punches 5, 5' enter along the respective through-holes of the upper and lower dies by way of master plates 6, 6', whereby the rough-forged shape having convex faces in the positions corresponding to the respective crankshaft parts 2a on the material 1 is formed. At the same time, the excess metal of the material 1 is moved toward the die cavities 4, 4' for adjoining crank throw parts 2b, whereby the material shortage in the die cavities is replenished.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54069057A JPS5813250B2 (en) | 1979-06-02 | 1979-06-02 | Crankshaft rough forging method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54069057A JPS5813250B2 (en) | 1979-06-02 | 1979-06-02 | Crankshaft rough forging method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55161541A true JPS55161541A (en) | 1980-12-16 |
JPS5813250B2 JPS5813250B2 (en) | 1983-03-12 |
Family
ID=13391553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54069057A Expired JPS5813250B2 (en) | 1979-06-02 | 1979-06-02 | Crankshaft rough forging method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5813250B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101823116A (en) * | 2010-05-11 | 2010-09-08 | 林素伟 | Forging process for engine crankshaft of excavator |
WO2016147674A1 (en) * | 2015-03-18 | 2016-09-22 | 新日鐵住金株式会社 | Method for manufacturing forged crankshaft |
WO2016152933A1 (en) * | 2015-03-24 | 2016-09-29 | 新日鐵住金株式会社 | Method for manufacturing forged crankshaft |
WO2019176508A1 (en) * | 2018-03-16 | 2019-09-19 | 日本製鉄株式会社 | Method for producing forged crankshaft |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6094238U (en) * | 1983-12-05 | 1985-06-27 | テルモ株式会社 | Temperature sensor for extracorporeal blood circulation circuit |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49119849A (en) * | 1973-03-06 | 1974-11-15 |
-
1979
- 1979-06-02 JP JP54069057A patent/JPS5813250B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49119849A (en) * | 1973-03-06 | 1974-11-15 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101823116A (en) * | 2010-05-11 | 2010-09-08 | 林素伟 | Forging process for engine crankshaft of excavator |
WO2016147674A1 (en) * | 2015-03-18 | 2016-09-22 | 新日鐵住金株式会社 | Method for manufacturing forged crankshaft |
CN107405677A (en) * | 2015-03-18 | 2017-11-28 | 新日铁住金株式会社 | The manufacture method of crankshaft forging |
JPWO2016147674A1 (en) * | 2015-03-18 | 2018-01-18 | 新日鐵住金株式会社 | Manufacturing method of forged crankshaft |
CN107405677B (en) * | 2015-03-18 | 2018-11-06 | 新日铁住金株式会社 | The manufacturing method of crankshaft forging |
WO2016152933A1 (en) * | 2015-03-24 | 2016-09-29 | 新日鐵住金株式会社 | Method for manufacturing forged crankshaft |
CN107405678A (en) * | 2015-03-24 | 2017-11-28 | 新日铁住金株式会社 | The manufacture method of crankshaft forging |
JPWO2016152933A1 (en) * | 2015-03-24 | 2017-12-07 | 新日鐵住金株式会社 | Manufacturing method of forged crankshaft |
WO2019176508A1 (en) * | 2018-03-16 | 2019-09-19 | 日本製鉄株式会社 | Method for producing forged crankshaft |
Also Published As
Publication number | Publication date |
---|---|
JPS5813250B2 (en) | 1983-03-12 |
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