Title:
細長い物体の一つ以上の長さ方向部分の断面を変形する方法と装置
Document Type and Number:
Japanese Patent JP2010531733
Kind Code:
A
Abstract:
The invention relates to such a method and apparatus, as well as to the resulting deformed object out of a relatively hard material such as e.g. a metal or plastic wire in which an undeformed section (2) is clamped near its ends (3, 4) and is subsequently upset in a controlled way by an axial pressure force (22) to a predefined shortened and thickened longitudinal section (5), with which simultaneously over substantially the entire contour sheath (19) of this section (2) a counterforce (29) is exerted so that, with the progressive deformation during upsetting, the total volume of the longitudinal section that is deforming, remains substantially constant. In this thickened section (5) a flattened zone (8) can subsequently be applied in order to realise a final shape (10) such as an opening (26). The invention concerns in particular also the use of a deformation line (40) for manufacturing a heddle for weaving looms.
Inventors:
Denaire, michel
Application Number:
JP2009553065A
Publication Date:
September 30, 2010
Filing Date:
March 11, 2008
Export Citation:
Assignee:
Durban Invest N.V.
International Classes:
B21F45/08; B21F5/00; D03C9/04
Domestic Patent References:
| JPS63174935U | 1988-11-14 | |||
| JPS4513703B1 | ||||
| JP48704Z |
Attorney, Agent or Firm:
Akira Kano