METHOD AND SYSTEM FOR PRODUCING RING-SHAPED MEMBER FOR VEHICLE, AND SYNCHRONIZER RING

Title:

METHOD AND SYSTEM FOR PRODUCING RING-SHAPED MEMBER FOR VEHICLE, AND SYNCHRONIZER RING

Document Type and Number:

WIPO Patent Application WO/2017/104800

Kind Code:

A1

Abstract:

Provided are a method and system for producing a ring-shaped member, said method and system improving production efficiency. A punching process is carried out on an axial intermediate part of a first intermediate annular material (25) so as to produce a pair of ring-shaped members (a first ring-shaped member 28A and a second ring-shaped member 28B). A punching step comprises a step in which a first punching process is carried out over a first range of the axial intermediate part in the circumferential direction, and a step in which a second punching process is carried out over a second range of the axially-oriented intermediate part, which is at least partially different than the first range, in the circumferential direction. The first punching process is carried out such that at least one tab (15a, 15b) is formed. The second punching process is carried out such that at least one separate tab (15a, 15b) is formed, thereby producing the pair of ring-shaped members (28A, 28B).

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Inventors:

KOBAYASHI KAZUTO (JP)
KOYAMA HIROSHI (JP)
YASUDA YUU (JP)

Application Number:

PCT/JP2016/087543

Publication Date:

June 22, 2017

Filing Date:

December 16, 2016

Export Citation:

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Assignee:

NSK LTD (JP)

International Classes:

B21D28/28; B21D28/00; B21D53/26; B21K1/30; F16D23/06

Foreign References:

JPH049238A	1992-01-14
JPH0270329A	1990-03-09
JPH03297527A	1991-12-27

Other References: