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Patent Searching and Data


Title:
BURRING MACHINING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/080431
Kind Code:
A1
Abstract:
A burring machining material that has a structure satisfying the following Relational Expressions (1) to (3) is disclosed as a burring machining material capable of suppressing occurrence of fatigue cracking at burring machining portions. 3 ≤ Ra ≤ 100 …(1) 3.0 < h …(2) 24 + r - [TS / (40 + 0.28 × Ra)] < h …(3) Ra: arithmetic average coarseness (µm) of burring edge face, h: burring height (mm), r: radius (mm) of curvature of curved wall portion of burring machining portion, TS: tensile strength (MPa)

Inventors:
NAKADA KOHEI (JP)
TABATA RYO (JP)
KAWACHI TAKESHI (JP)
TOYODA TAKESHI (JP)
Application Number:
PCT/JP2021/037961
Publication Date:
April 21, 2022
Filing Date:
October 13, 2021
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
International Classes:
B21D19/08; C22C38/00; C22C38/60
Foreign References:
JP2018051609A2018-04-05
JP2826645B21998-11-18
JP2013164093A2013-08-22
JP2016159300A2016-09-05
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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