Title:
MANUFACTURING METHOD FOR CRANK SHAFT
Document Type and Number:
Japanese Patent JP2018053962
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method for a crank shaft capable of preventing a crack from occurring on a crank shaft in a process of fixing bending, to manufacture a crank shaft with high strength.SOLUTION: A manufacturing method of a crank shaft 1, which is formed by connecting a crank journal 2 and a crank pin 3 to each other with a crank arm 4, comprises the steps of: soft-nitriding the crank shaft 1 to form a compound layer 6 on a surface of the crank shaft 1; removing the compound layer 6 at a first connection corner part 11 between the crank journal 2 and the crank arm 4 and a second connection corner part 12 between the crank pin 3 and the crank arm 4; and correcting bending occurring at the crank shaft 1 with soft-nitriding.SELECTED DRAWING: Figure 2
Inventors:
YAMADA AKINORI
ETO HIROHITO
ETO HIROHITO
Application Number:
JP2016188314A
Publication Date:
April 05, 2018
Filing Date:
September 27, 2016
Export Citation:
Assignee:
ISUZU MOTORS LTD
International Classes:
F16C3/08; C21D1/06; C21D1/76; C21D9/30; C23C8/32; C23C8/80
Domestic Patent References:
| JP2014129607A | 2014-07-10 | |||
| JP2011042846A | 2011-03-03 | |||
| JP2004293721A | 2004-10-21 | |||
| JP2001254143A | 2001-09-18 |
Foreign References:
| WO2016035519A1 | 2016-03-10 | |||
| US20100146753A1 | 2010-06-17 | |||
| CN104438479A | 2015-03-25 |
Attorney, Agent or Firm:
Haruhisa Kinutani
Hiroyuki Hashiyama
Hiroyuki Hashiyama