Title:
PRESS-FORMING DEVICE, PRESS-FORMING METHOD USING SAME, AND ROTOR CORE OF ALTERNATING-CURRENT GENERATOR FOR AUTOMOBILE MANUFACTURED USING THIS PRESS-FORMING METHOD
Document Type and Number:
WIPO Patent Application WO/2014/025022
Kind Code:
A1
Abstract:
[Problem] To achieve a press-forming device with which, when a steel rod-shaped projection having a tapered shape is press-formed, burrs generated between the projection and a back surface tool can be reduced without requiring an advanced lubricating film, and the forming of a back-surface part can be performed more suitably, and the service life of the forming tool can be prolonged.
[Solution] A device for press-forming a steel rod-shaped projection having a tapered tip, the device being characterized in that a preformed material to be processed (31a) is held in a back surface tool (32) and a freely rotating rotary roll (41) is rolled toward the tapered tip part of this material to be processed (31a) while being pressed against this material to be processed, thereby plastically deforming the material to be processed (31a) to form a tapered shape.
Inventors:
NUKA MOTOHARU (TH)
NOGUCHI TAKAYO (JP)
MURAMATSU TSUYOSHI (TH)
NOGUCHI TAKAYO (JP)
MURAMATSU TSUYOSHI (TH)
Application Number:
PCT/JP2013/071685
Publication Date:
February 13, 2014
Filing Date:
August 09, 2013
Export Citation:
Assignee:
SIGMA & HEARTS CO LTD (TH)
NUKA MOTOHARU (TH)
NOGUCHI TAKAYO (JP)
MURAMATSU TSUYOSHI (TH)
NUKA MOTOHARU (TH)
NOGUCHI TAKAYO (JP)
MURAMATSU TSUYOSHI (TH)
International Classes:
B21J5/06
Foreign References:
| JP2002320362A | 2002-10-31 | |||
| JPH1177227A | 1999-03-23 | |||
| JPS4940068B1 | 1974-10-30 | |||
| JP2011189357A | 2011-09-29 | |||
| JP2003112229A | 2003-04-15 |
Other References:
See also references of EP 2896472A4
None
None
Attorney, Agent or Firm:
TACHIBANA, Tetsuo et al. (JP)
Mandarin orange tree Tetsuo (JP)
Mandarin orange tree Tetsuo (JP)
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