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Title:
MANUFACTURE OF MULTISTEP V-PULLEY MADE OF SHEET METAL
Document Type and Number:
Japanese Patent JPS60121024
Kind Code:
A
Abstract:

PURPOSE: To provide high strength to the attaching part of a V-pulley and to make it light in weight as a whole by drawing a sheet-shaped blank material into a closed-end, cylindrical, intermediate formed-part and forming plural V- grooves in its outer peripheral surface after providing thickness reduction to its cylindrical part.

CONSTITUTION: A closed-end, cylindrical, primary formed-part 22 is obtained by providing a primary drawing to a discoidal blank material 20, and a secondary formed-part 24 having stepped, closed-end, cylindrical shape is obtained by providing a secondary drawing to the part 22; and then a tertiary formed-part 32 having a bottom part 26 made to be an attaching part, a cylindrical part 28 to be a hub part, and a cylindrical part 30 to be a peripheral wall part, is obtained by providing a tertiary drawing to the part 24. Successively a quartic formed- part 40 is obtained by providing thickness reduction to the part 32 to make the thickness of part 30 less than that of the part 26; and the quintic formed-part 52 is obtained by forming annular projections 48, 50 in the outer periphery of part 40. Thus a multistep V-pulley 2 is obtained by forming plural V-grooves in the cylindrical outer-peripheral surface of part 52.


Inventors:
TANIMA RETSU
Application Number:
JP23003683A
Publication Date:
June 28, 1985
Filing Date:
December 06, 1983
Export Citation:
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Assignee:
KOJIMA PRESS KOGYO KK
International Classes:
B21D53/26; F16H55/44; (IPC1-7): B21D53/26; F16H55/44
Attorney, Agent or Firm:
Nakajima Michio



 
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