Title:
【発明の名称】ブシュの曲げ加工のための方法と装置
Document Type and Number:
Japanese Patent JPH10501467
Kind Code:
A
Abstract:
The invention concerns a rounding device (10) comprising two shaping dies (12, 14) with shaping chambers (22, 24) in order to round a sheet bar (26) about a core (16). The peripheral lengths of the two shaping chambers (22, 24) are each longer than half the can length. During a shaping step, the core (16) penetrates a first shaping chamber (22) by a depth which is greater than the can radius. The sheet bar (26) is thus shaped in the form of a U. In an intermediate shaping stage, an auxiliary core (18) is placed on the core (16) such that, as the second shaping die (14) moves downwards, only the ends of the U-legs of the sheet bar blank (26) are shaped arcuately. When the auxiliary core (18) and part (20) of the first shaping die (12) have been removed, the final can shaping process occurs, in which the second shaping die (14) likewise travels over the centre of the can. The three-stage rounding method enables cans to be rounded highly accurately and carefully.
Inventors:
Halalto garut
Application Number:
JP52887496A
Publication Date:
February 10, 1998
Filing Date:
March 19, 1996
Export Citation:
Assignee:
Claus-Matsuhuai Actien Zeger Schaft
International Classes:
B21D5/00; B21D11/00; B21D5/01; B21D22/02; B21D51/10; B21D53/10; B65D1/12; (IPC1-7): B21D5/01
Attorney, Agent or Firm:
Toshio Yano (3 outside)