METHOD FOR FORMING PULLEY FOR BELT TYPE CVT AND PULLEY FOR BELT TYPE CVT FORMED BY SAID FORMING METHOD

WIPO Patent Application WO/2014/208220

A1

The purpose of the present invention is to provide a low-cost method for forming a pulley for a belt type CVT such that, by molding a conical belt sliding surface part and a cylindrical shaft part as a unit from raw materials, problems with residual stress, strain, and defects accompanying welding are eliminated and high strength, uniformity, and reduced weight are provided. A disk shaped raw material (W0) is cleaved using a cleaving roller (R1) to a position corresponding to the outer peripheral surface of a shaft part (22) from the outer peripheral surface thereof toward the center part while rotating the raw material (W0). One side (W1b) of the cleaved raw material (W1) is compressed and reduced in diameter using a forming roller (R2). Furthermore, ironing forming is performed on a cylindrical shaft part (W2b) formed using the forming roller (R2) by using an ironing roller (R3) while pressing against a mold (D2), thereby forming a cylindrical shaft part (W3b). Also, ironing forming is performed on the other side (W1a) of the cleaved raw material (W1) by using an ironing roller (R4) while pressing onto a mold (D1), thereby forming a conical belt sliding surface part (W4a).

JPH05200472	MANUFACTURE OF WHEEL
WO/2001/007181	SHEET METAL MEMBER AND METHOD OF MANUFACTURING THE MEMBER
JP3699553	PRODUCTION OF POLY-V PULLEY

HIGAKI KOJI (JP)

PCT/JP2014/063294

December 31, 2014

May 20, 2014

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NIHON SPINDLE MFG CO LTD (JP)

B21H1/04; B21D22/14; B21D53/26; F16H9/12

US5987952A	1999-11-23
JP2006218496A	2006-08-24
JP2004537699A	2004-12-16
JP2004001092A	2004-01-08

MORI, OSAMU (JP)
Woods 治 (JP)

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