Title:
BREAKING METHOD FOR METALLIC COMPONENT AND BREAKING METHOD FOR CONNECTING ROD
Document Type and Number:
Japanese Patent JP2020085208
Kind Code:
A
Abstract:
To provide a breaking method capable of performing breaking while forming a satisfactory broken-out surface in which three-dimensional displacement is suppressed, by using a method for easily forming a stress concentration part.SOLUTION: The present invention relates to a breaking method for a metallic component in which a metallic components 1, B including a predetermined through-hole 5a is provided, a groove part 17 continued from a first opening end to a second opening end of the through-hole is formed at opposed positions on an inner peripheral surface of the through-hole, and the metallic component is broken from the groove part. Positions δ, δ1 and δ2 where a stress is concentrated when starting breaking the metallic component are specified in the groove part of the metallic component. A stress concentration part 19 is formed at a position of a bottom of the groove part corresponding to a specified position of the groove part in such a manner that the specified position is defined as a breaking start point. When starting breaking the metallic component, a crack S1 is generated from the stress concentration part 19 first among portions of the groove part, and a crack S2 is grown from the portions of the groove part.SELECTED DRAWING: Figure 2
Inventors:
HASE KOICHI
KAIMASU YUJI
KAIMASU YUJI
Application Number:
JP2018224821A
Publication Date:
June 04, 2020
Filing Date:
November 30, 2018
Export Citation:
Assignee:
YASUNAGA KK
International Classes:
F16C7/00; B26F3/02
Domestic Patent References:
| JP2006300081A | 2006-11-02 | |||
| JP2003049822A | 2003-02-21 | |||
| JP2000002231A | 2000-01-07 |
Foreign References:
| US6357321B1 | 2002-03-19 |
Attorney, Agent or Firm:
Koji Nagato