Cushion pin device for press
AssigneeHyundai Motor Company
InventorJu Young Kim
Life of this patent
Estimating the term…
Abstract
A cushion pin device for a press having a cushion pad in which a blank holder is seated on the top thereof outside a lower mold, and locks a blank holder to an upper mold while pressurizing an edge of a molded panel, includes: a cushion support disposed below the cushion pad, a cushion cylinder connected with a lower part of the cushion pad to move up or down the cushion pad from the cushion support, a linear scale mounted between the cushion pad and the cushion support to measure the position of the cushion pad, a main pressure control unit that keeps internal pressure of each cushion cylinder similarly, and a sub pressure control unit that is interconnected with the main pressure control unit so as to control the locking position of the cushion pad when each cushion cylinder operates.
Claims7
A cushion pin device for a press comprising:
- a cushion pad;
- a cushion support disposed below the cushion pad;
- cushion cylinders connected to the cushion pad to move the cushion pad up or down from the cushion support;
- main pressure control units, each of the main pressure control units is connected to a corresponding cushion cylinder for controlling a flow of working fluids into and out of the corresponding cushion cylinder, each of the main pressure control units is in communication with the other cushion cylinders to keep internal pressure of each of the cushion cylinders at a same pressure so that each of the cushion cylinders operate simultaneously when the cushion cylinders are operated for lock holding and locking move-up of the cushion pad;
- and
- a sub pressure control unit that is interconnected with the main pressure control units and cushion cylinders so as to control a locking position of the cushion pad when each of the cushion cylinders is operated, and
- support cylinders separate from the cushion cylinders that are mounted on both lower sides of the cushion support to support both lower sides of the cushion pad respectively which moves up from the cushion support.
Dependencies are inferred from the claim text.