Title:
WORKING APPARATUS FOR FORMING CURVED SURFACE
Document Type and Number:
Japanese Patent JPS544272
Kind Code:
A
Abstract:
PURPOSE: To make sufficient the small number of times of press work, by forming the working plane of upper and lower forming dies so as to form a portion of the surface ofthe polyhedron touchin ginternally to the sphere, into the eggplant form, and by bending the steel plate wiht a large bending angle at the edge portion of the forming plane, and alsonby causing a permanent deformation at the crooked portion.
Inventors:
TAKIZAWA AKIRA
OOMORI MASARU
SEO HAJIME
AOKI TOSHIO
MURAKAMI MASAKI
OOMORI MASARU
SEO HAJIME
AOKI TOSHIO
MURAKAMI MASAKI
Application Number:
JP6928377A
Publication Date:
January 12, 1979
Filing Date:
June 10, 1977
Export Citation:
Assignee:
HITACHI SHIPBUILDING ENG CO
International Classes:
B21D5/01; B21D11/20; (IPC1-7): B21D11/20
Next Patent: RADIO WAVE ABSORBING PANEL FOR GLASS CURTAIN WALL