Manufacturing apparatus and manufacturing method for stretch-formed product
US10071410B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2014 |
| Grant date | Sep 11, 2018 |
| Priority date | — |
| Expiry date | Dec 10, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D35/003
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
There is provided a manufacturing apparatus and a manufacturing method for a stretch-formed product which can improve the yield of material in the stretch forming performed while clamping the blank by the lock beads. The manufacturing apparatus for a stretch-formed product includes a die and a blank holder which have clamping surfaces facing each other, a punch that, in a state where a margin of a blank of a sheet material is clamped by the clamping surfaces of the die and the blank holder, relatively presses a forming region of the blank into the die and thereby performs stretch forming on the forming region of the blank, and lock beads that are provided on the clamping surfaces of the die and the blank holder in mutually similar shapes and have first surfaces, second surfaces that intersect with the first surfaces, and third surfaces that intersect with the second surfaces from outer edges toward the centers of the die and the blank holder, the first surfaces each having a plurality of depression-protrusion parts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.