JPS55161541A - Closed rough forging method of crankshaft - Google Patents

Closed rough forging method of crankshaft

Info

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
Application number
JP6905779A
Other languages
Japanese (ja)
Other versions
JPS5813250B2 (en
Inventor
Michio Bessho
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.)
Kawasaki Hydromechanics Corp
Original Assignee
Kawasaki Hydromechanics Corp
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 Kawasaki Hydromechanics Corp filed Critical Kawasaki Hydromechanics Corp
Priority to JP54069057A priority Critical patent/JPS5813250B2/en
Publication of JPS55161541A publication Critical patent/JPS55161541A/en
Publication of JPS5813250B2 publication Critical patent/JPS5813250B2/en
Expired legal-status Critical Current

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
JP54069057A 1979-06-02 1979-06-02 Crankshaft rough forging method Expired JPS5813250B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49119849A (en) * 1973-03-06 1974-11-15

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49119849A (en) * 1973-03-06 1974-11-15

Cited By (9)

* Cited by examiner, † Cited by third party
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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