Title:
METHOD FOR MANUFACTURING FORMED MATERIAL, AND FORMING METAL MOLD
Document Type and Number:
WIPO Patent Application WO/2020/184480
Kind Code:
A1
Abstract:
Provided is a method for manufacturing a formed material, comprising manufacturing a formed material having a trunk portion and a flange portion by subjecting a raw-material metal plate to multi-stage drawing. The multi-stage drawing includes performing compressive drawing at least once for forming the trunk portion by drawing a trunk portion element while applying a compressive force to the trunk portion element using a metal mold which includes a die having a push-in hole, a punch, and a pressing means for applying a compressive force to the peripheral wall of the trunk portion element along a depth direction of the trunk portion element. The push-in hole has a tapered surface which extends in the circumferential direction of the push-in hole at the entry of the push-in hole, and which extends while being inclined with respect to the axial direction of the push-in hole. The push-in hole is configured such that component forces of the compressive force are directed toward radially inside of the push-in hole due to the tapered surface.
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Inventors:
IWANAGA SHUICHI (JP)
NAKAMURA NAOFUMI (JP)
NAKAMURA NAOFUMI (JP)
Application Number:
PCT/JP2020/009850
Publication Date:
September 17, 2020
Filing Date:
March 06, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
B21D22/28; B21D24/06
Foreign References:
| JP2016000427A | 2016-01-07 | |||
| JPH03221218A | 1991-09-30 | |||
| JPS6092021A | 1985-05-23 |
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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