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Patent Searching and Data


Title:
LUBRICATED PUNCH
Document Type and Number:
WIPO Patent Application WO/2017/090818
Kind Code:
A1
Abstract:
The present invention relates to a punch for making holes in a thin sheet material made of metal and the like, the punch having excellent durability since lubricating oil can be supplied to the outer surface of the end portion of the punch. The punch comprises: a body comprising a punching part positioned at one side thereof in the longitudinal direction and a supporting part positioned at the other side thereof in the longitudinal direction; a lubricating oil passage formed to penetrate the inside of the body in the longitudinal direction, and having one or more outlets on the outer surface of the punching part; and a lubricating oil supply control means for opening and closing the outlets of the lubricating oil passage.

Inventors:
LEE, Suk Man (102-803. 32, Dotjil-ro 261beon-gilNam-gu, Ulsan, 44699, KR)
LEE, Sun Hong (305-304, 2879-7 Ulmil-ro, Beomseo-eup,Ulju-gun, Ulsan, 44934, KR)
Application Number:
KR2015/014066
Publication Date:
June 01, 2017
Filing Date:
December 22, 2015
Export Citation:
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Assignee:
GIL CO.,LTD. (4 Jukjeon-ro, Buk-gu, Ulsan, 44253, KR)
LEE, Suk Man (102-803. 32, Dotjil-ro 261beon-gilNam-gu, Ulsan, 44699, KR)
International Classes:
B21D28/34; B21D37/18
Foreign References:
JP2001137974A2001-05-22
JP2009082976A2009-04-23
JPH10109125A1998-04-28
KR200446799Y12009-12-03
JPH07112227A1995-05-02
Attorney, Agent or Firm:
KIM, Su-Jin (17F, 430 Eonju-ro,Gangnam-gu, Seoul, 06210, KR)
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