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Title:
METHOD FOR FORMING HOLE-PROCESSED CASTS, CAST CASING, AND SCREW COMPRESSOR CASING
Document Type and Number:
WIPO Patent Application WO/2015/114932
Kind Code:
A1
Abstract:
A method for forming hole-processed casts that performs hole processing with a drill (17) so that the hole communicates with a cored hole (12) comprises a casting step and a hole processing step. In the casting step, a cast (10) is made, the cast having the cored hole (12) that includes a flat inner wall face (15a), with the width of the position where hole processing is performed with a drill (17) being a second length (H2) resulting from adding a first height (H1) that is the manufacturing error range for the cast (10) to the diameter (D) of the drill (17). In the hole processing step, a through-hole (13) is formed by way of the drill (17) so that the inside of the cored hole (12) and the outside of the cast (10) communicate via the flat inner wall face (15a).

Inventors:
MIYATAKE, Toshiyuki
YONETSU, Tomoya
Application Number:
JP2014/081463
Publication Date:
August 06, 2015
Filing Date:
November 27, 2014
Export Citation:
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Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.) (2-4 Wakinohama-Kaigandori 2-chome, Chuo-ku Kobe-sh, Hyogo 85, 〒6518585, JP)
International Classes:
B23B35/00; B22C9/04; B22C9/24; B22D29/00; B23B41/00; B23P15/00; F04C29/00
Foreign References:
JPS56131819A1981-10-15
JP2009243404A2009-10-22
JPS52111083A1977-09-17
JP2012011477A2012-01-19
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (AOYAMA & PARTNERS, Umeda Hankyu Bldg. Office Tower 8-1, Kakuda-cho, Kita-ku, Osaka-sh, Osaka 17, 〒5300017, JP)
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