Ironing mold and formed material manufacturing method
US9744580B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Apr 15, 2014 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Apr 15, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D22/30
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An ironing mold according to the present invention is provided with a punch, and a die which forms a pushing hole with respect to the punch. When the skewness Rsk of a surface treated metal plate is less than −0.6 and no less than −1.3, then the curvature radius of a shoulder portion of the die and a clearance between a radius end and the punch are determined such that Y, which is expressed by {(tre−cre)/tre}×100, and X, which is expressed by r/tre, satisfy 0<Y≦18.7X−6.1, X satisfies X≧0.6 and r satisfies r≦0.5 h.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.