Title:
DRILLING DEVICE, DRILLING METAL MOLD, AND METHOD OF CHANGING THE MOLD
Document Type and Number:
WIPO Patent Application WO/2007/043125
Kind Code:
A1
Abstract:
A drilling device (100) comprising a die mold (120), a punch mold (130) having
a punch, and a punch lifting mechanism (60) lifting the punch. The punch (140)
comprises a punch body (142) and a punch head part (144), and the punch lifting
mechanism (60) comprises punch head part holding parts (82, 84) capable of holding
the punch head part. The drilling device further comprises a holding state control
mechanism for holding the punch head part on the punch head part holding parts
and releasing the held state of the punch head part by the punch head part holding
parts. In the drilling device (100), since only the punch can be replaced, when
the punch of the punch mold is worn, all spare parts for a drilling mold must not
be prepared, that was required in a conventional drilling device. As a result,
the drilling device can easily reduce drilling cost.
Inventors:
KATO KAZUHIKO (JP)
Application Number:
PCT/JP2005/018199
Publication Date:
April 19, 2007
Filing Date:
September 30, 2005
Export Citation:
Assignee:
BEAC CO LTD (JP)
KATO KAZUHIKO (JP)
KATO KAZUHIKO (JP)
International Classes:
B21D28/34; B21D37/04
Foreign References:
JPS61192498A | 1986-08-27 | |||
JPH09192757A | 1997-07-29 | |||
JPH0732298A | 1995-02-03 | |||
JPS6286926U | 1987-06-03 | |||
JP2001347325A | 2001-12-18 | |||
JPS6060123U | 1985-04-26 | |||
JPS5982122A | 1984-05-12 | |||
JPH09141599A | 1997-06-03 | |||
JPH01181926A | 1989-07-19 |
Attorney, Agent or Firm:
MATSUO, Nobutaka et al. (9862-60 Ochiai, Fujimi-machi, Suwa-gu, Nagano 14, JP)
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