Title:
MOLDING DEVICE FOR PULLING OPEN ELONGATED HOLES IN PIPES OR SHEETS
Document Type and Number:
WIPO Patent Application WO/2012/102271
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a high-tolerance molding device that uses a pulling technique to quickly form a desired elongated hole in a workpiece such as a pipe or a sheet with little material loss, due to the use of single-piece molding, while preventing material degradation. The workpiece is provided with a pilot hole that is smaller than but roughly concentric with the desired elongated hole. This molding device is characterized by the provision of: a power-coupling arm that moves in a direction roughly perpendicular to the surface in which the aforementioned pilot hole is provided and can be inserted into said pilot hole; a control unit that controls the movement of said power-coupling arm; and a plug that is prepositioned on the opposite side, with respect to the power-coupling arm, of the surface of the workpiece in which the pilot hole is provided. Said plug can engage with and move together with the arm.
Inventors:
ARAKI KATSUKI (JP)
Application Number:
PCT/JP2012/051449
Publication Date:
August 02, 2012
Filing Date:
January 24, 2012
Export Citation:
Assignee:
ARAKI TECHNICAL AND RES CO LTD (JP)
ARAKI KATSUKI (JP)
ARAKI KATSUKI (JP)
International Classes:
B21D19/08
Foreign References:
| JPH0390221A | 1991-04-16 | |||
| JPH09103827A | 1997-04-22 | |||
| JP2003001331A | 2003-01-07 |
Attorney, Agent or Firm:
OKUMACHI TETSUYUKI (JP)
奥町 Tetsuyuki (JP)
奥町 Tetsuyuki (JP)
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Claims: