Title:
METHOD OF MANUFACTURING MAGNETIC POLE FOR ELECTRIC MACHINE
Document Type and Number:
Japanese Patent JPS55125058
Kind Code:
A
Abstract:
The present specification discloses a method for the manufacture of a pole shoe for electrical machines by the non-cutting shaping of a rolled- section blank. In known non-cutting methods the blank is fully subjected, during each shaping stage, to the forming forces simultaneously both in the region of the pole shoe core and in the region of the pole horns. The method of the present invention is performed by means of a progressive tool (1, 2,) (8, Figure 1, not shown) in two shaping stages, or in a device comprising two upsetting dies (24, 26). In the first shaping stage the core region (12) of the pole shoe is fully formed, and, in the second shaping stage, the pole horns (18, Figures 3,6, not shown) are fully formed by pressing. According to this method the forming of the core region (12) and the forming of the pole horns (18) are performed by separate applications of force, whereby the forming forces may be substantially reduced.
Inventors:
HAINRIHI BUIRUKE
KURAUSU BERUTORAMU
PEETAA FURANTSU
BUERUNAA ROSU
KURAUSU BERUTORAMU
PEETAA FURANTSU
BUERUNAA ROSU
Application Number:
JP2930080A
Publication Date:
September 26, 1980
Filing Date:
March 10, 1980
Export Citation:
Assignee:
BOSCH GMBH ROBERT
International Classes:
B21J5/08; B21K1/76; H02K15/02; (IPC1-7): H02K15/02