Title:
PLUG USED IN PIERCING MACHINE
Document Type and Number:
WIPO Patent Application WO/2013/161489
Kind Code:
A1
Abstract:
In order to extend the service life of a plug used in a piercing machine that pierce-rolls a billet, a plug (10) used in a piercing machine (30) that pierce-rolls a billet (36) is equipped with a plug main body (12), a buildup layer (14), and a spray coating (16). The buildup layer (14) is formed on the surface of the plug main body (12). The spray coating (16) covers at least the region of the surface of the plug main body (12) running from the rear end of the buildup layer (14) to the point of the maximum outer diameter of the plug main body (12).
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Inventors:
HIDAKA YASUYOSHI (JP)
HIGASHIDA YASUTO (JP)
SHIMODA KAZUHIRO (JP)
HIGASHIDA YASUTO (JP)
SHIMODA KAZUHIRO (JP)
Application Number:
PCT/JP2013/058866
Publication Date:
October 31, 2013
Filing Date:
March 26, 2013
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21B25/00; B21B19/04; C23C4/00
Foreign References:
| JP2010227999A | 2010-10-14 | |||
| JPH10249412A | 1998-09-22 | |||
| JPH03193204A | 1991-08-23 | |||
| JPS63248504A | 1988-10-14 | |||
| JP2009101408A | 2009-05-14 | |||
| JP4279350B1 | 2009-06-17 | |||
| JP2776266B2 | 1998-07-16 | |||
| JP3891679B2 | 2007-03-14 | |||
| JP2009101408A | 2009-05-14 |
Other References:
See also references of EP 2842645A4
Attorney, Agent or Firm:
UEBA Hidetoshi et al. (JP)
Hidetoshi Ueha (JP)
Hidetoshi Ueha (JP)
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