JPS5768239A - Manufacturing device of crank arm for welded crank shaft - Google Patents
Manufacturing device of crank arm for welded crank shaftInfo
- Publication number
- JPS5768239A JPS5768239A JP14223280A JP14223280A JPS5768239A JP S5768239 A JPS5768239 A JP S5768239A JP 14223280 A JP14223280 A JP 14223280A JP 14223280 A JP14223280 A JP 14223280A JP S5768239 A JPS5768239 A JP S5768239A
- Authority
- JP
- Japan
- Prior art keywords
- punches
- blank
- upper die
- crank
- plate blank
- 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 reduce the time for forming by half by installing punches that form a recessed part for projecting a crak pin so that they act to the lower die and upper die independently and thereby forging a plate blank from both sides simultaneously by pressing.
CONSTITUTION: A plate blank is placed on a forming member 8a of a lower die 5a. It is then shifted to just below an upper die 5b and the upper die 5b is moved downward to press the forming member 8a, 8b vertically inserting a spacer. The plate blank makes plastic deformation and a part of the blank bulges to the direction of a recessed part and a hole in which punches 13a, 13b advance and retreat, and a part corresponding to a crank pin forming part is formed thick. When punches 13a, 13b are advanced simultaneously with the upper and lower dies 5b, 5a pressed by a press, the blank of the thick part is pushed to the direction of the recessed part, and the projected part of the punch side is formed simultaneously filled between end face controlling members 12a, 12b, and projections that make the crank pin are formed.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14223280A JPS5768239A (en) | 1980-10-11 | 1980-10-11 | Manufacturing device of crank arm for welded crank shaft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14223280A JPS5768239A (en) | 1980-10-11 | 1980-10-11 | Manufacturing device of crank arm for welded crank shaft |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5768239A true JPS5768239A (en) | 1982-04-26 |
Family
ID=15310491
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14223280A Pending JPS5768239A (en) | 1980-10-11 | 1980-10-11 | Manufacturing device of crank arm for welded crank shaft |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5768239A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59133598U (en) * | 1983-02-25 | 1984-09-06 | 日本輸送機株式会社 | forklift |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5568148A (en) * | 1978-11-13 | 1980-05-22 | Kawasaki Yukou Kk | Closed forging method of crankshaft |
JPS5597837A (en) * | 1979-01-22 | 1980-07-25 | Burmeister & Wains Mot Mask | Preparation of crank arm for welding crankkshaft and press device that execute said method |
-
1980
- 1980-10-11 JP JP14223280A patent/JPS5768239A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5568148A (en) * | 1978-11-13 | 1980-05-22 | Kawasaki Yukou Kk | Closed forging method of crankshaft |
JPS5597837A (en) * | 1979-01-22 | 1980-07-25 | Burmeister & Wains Mot Mask | Preparation of crank arm for welding crankkshaft and press device that execute said method |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59133598U (en) * | 1983-02-25 | 1984-09-06 | 日本輸送機株式会社 | forklift |
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