Title:
METAL PART FRACTURE MACHINE, CONNECTING ROD FRACTURE MACHINE, METAL PART FRACTURE METHOD, CONNECTING ROD FRACTURE METHOD, METHOD FOR MANUFACTURING METAL PART, AND METHOD FOR MANUFACTURING CONNECTING ROD
Document Type and Number:
WIPO Patent Application WO/2020/203328
Kind Code:
A1
Abstract:
Using, as a half-split type mandrel 27 to be inserted into a through-hole 5a of a metal part and a connecting rod B, a semi-circular first mandrel 27a that comes into contact with a side surface of the through-hole having rigidity on the lower side and corresponds to the diameter of the through-hole and a semi-circular second mandrel 27b that comes into contact with a side surface of the though-hole having rigidity on the higher side and that has a radial dimension smaller than the first mandrel member, a correction for making the rigidity close to isotropic is performed and a crack that occurs in the metal part and the connecting rod is propagated along a target fracture surface α during fracturing.
Inventors:
HASE HIROICHI (JP)
MURATA GAKUTO (JP)
MATSUI JUNGO (JP)
MURATA GAKUTO (JP)
MATSUI JUNGO (JP)
Application Number:
PCT/JP2020/012179
Publication Date:
October 08, 2020
Filing Date:
March 19, 2020
Export Citation:
Assignee:
YASUNAGA KK (JP)
International Classes:
B26F3/02; F16C7/00; B23P13/00
Foreign References:
| JP2004261953A | 2004-09-24 | |||
| JP2008144925A | 2008-06-26 |
Attorney, Agent or Firm:
NAGATO, Kanji (JP)
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