Title:
VARIABLE DIE AND PRESSING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/068837
Kind Code:
A1
Abstract:
The present invention provides a variable die capable of changing forming conditions in order to correct a forming error due to springback of a material. According to one embodiment, the variable die comprises an upper part and a lower part. The upper part comprises an upper cam. The lower part comprises: a lower body; a mounting portion connected to the lower body and having an object to be formed mounted thereon; and a forming portion connected to the lower body, disposed on one side of the mounting portion, and comprising a lower cam corresponding to the upper cam to linearly move in a first direction toward the mounting portion by means of the upper cam and the lower cam. The forming portion comprises: the lower cam; a base plate having the lower cam connected thereto, and formed to be movable in the first direction; actuators having one part fixed to the base plate; and a cam block connected to the actuators. A plurality of actuators, which are distanced in a second direction different from the first direction, are connected to the cam block. The actuators have a structure which can be stretched in the first direction.
Inventors:
LEE JAE-WOOK (KR)
KIM TAE-HYO (KR)
KIM TAE-HYO (KR)
Application Number:
PCT/KR2022/016023
Publication Date:
April 27, 2023
Filing Date:
October 20, 2022
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
B21D22/24; B21D5/02; B30B15/02
Foreign References:
| CN211539221U | 2020-09-22 | |||
| KR102178739B1 | 2020-11-13 | |||
| KR100645587B1 | 2006-11-14 | |||
| KR20090100501A | 2009-09-24 | |||
| US20040020261A1 | 2004-02-05 |
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (KR)
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