JPS5768239A - Manufacturing device of crank arm for welded crank shaft - Google Patents

Manufacturing device of crank arm for welded crank shaft

Info

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
Application number
JP14223280A
Other languages
Japanese (ja)
Inventor
Yoshinori Fukui
Junichi Yonezawa
Kensaku Hatake
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP14223280A priority Critical patent/JPS5768239A/en
Publication of JPS5768239A publication Critical patent/JPS5768239A/en
Pending legal-status Critical Current

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  • 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
JP14223280A 1980-10-11 1980-10-11 Manufacturing device of crank arm for welded crank shaft Pending JPS5768239A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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