Die device

Abstract

There is provided a die device capable of reliably releasing a workpiece from a die even when the workpiece has an undercut, and conveying the workpiece to a next process. A die device including: a lower die; and a lifter that lifts a pressed workpiece from the lower die, the lower die having an undercut region which is a portion that interferes with the workpiece when the workpiece is moved along a press direction, the lifter including: a vacuum cup that comes into contact with the workpiece; a rod part having a distal end provided with the vacuum cup; and a linear drive servomotor for causing the rod part to advance/retreat in an axial direction, and further including a rotary drive servomotor that turns the lifter in a direction orthogonal to the axial direction, wherein the lifter moves the workpiece by combining both movement along the press direction and movement in a direction inclined to the press direction.

What is claimed is: 
     
         1 . A die device comprising:
 a lower die; and   a lifter that lifts a pressed workpiece from the lower die,   the lower die having an undercut region which is a portion that interferes with the workpiece when the workpiece is moved along a press direction,   the lifter comprising:   an abutting part that comes into contact with the workpiece;   a rod part having a distal end provided with the abutting part; and   a driving means for causing the rod part to advance/retreat in an axial direction, and   the die device further comprising a turning drive part that turns the lifter in a direction orthogonal to the axial direction, wherein   the lifter moves the workpiece by combining both movement along the press direction and movement in a direction inclined to the press direction.   
     
     
         2 . The die device according to  claim 1 ,
 wherein the undercut region of the lower die includes:   a movable die part that moves in such a direction as to release an undercut; and   a fixed die part having a portion that remains as an undercut in relation with the workpiece even in a state in which the movable die part moves to perform release.   
     
     
         3 . The die device according to  claim 1 ,
 wherein the abutting part is provided with a vacuum cup.   
     
     
         4 . The die device according to  claim 1 ,
 further comprising support lifters that advance and retreat in a direction along the press direction,   wherein the support lifters are provided in at least each one of a turning direction and a counter-turning direction of the lifter with the lifter interposed therebetween,   the die device comprising a control device that controls protrusion positions of the support lifters in accordance with turning operation of the lifter.   
     
     
         5 . The die device according to  claim 4 ,
 wherein the support lifters are each provided with a sliding member for enhancing sliding performance between the workpiece and the support lifter, at a portion that comes into contact with the workpiece.   
     
     
         6 . The die device according to  claim 1 ,
 wherein the undercut region of the lower die includes:   
       a movable die part that moves in such a direction as to release an undercut; and
 a fixed die part having a portion that remains as an undercut in relation with the workpiece even in a state in which the movable die part moves to perform release, and 
 the abutting part is provided with a vacuum cup. 
 
     
     
         7 . The die device according to  claim 1 ,
 wherein the undercut region of the lower die includes:   a movable die part that moves in such a direction as to release an undercut; and   a fixed die part having a portion that remains as an undercut in relation with the workpiece even in a state in which the movable die part moves to perform release,   the die device further comprising support lifters that advance and retreat in a direction along the press direction,   wherein the support lifters are provided in at least each one of a turning direction and a counter-turning direction of the lifter with the lifter interposed therebetween,   the die device comprising a control device that controls protrusion positions of the support lifters in accordance with turning operation of the lifter.   
     
     
         8 . The die device according to  claim 1 ,
 wherein the undercut region of the lower die includes:   a movable die part that moves in such a direction as to release an undercut; and   a fixed die part having a portion that remains as an undercut in relation with the workpiece even in a state in which the movable die part moves to perform release,   the abutting part is provided with a vacuum cup,   the die device further comprising support lifters that advance and retreat in a direction along the press direction,   wherein the support lifters are provided in at least each one of a turning direction and a counter-turning direction of the lifter with the lifter interposed therebetween,   the die device comprising a control device that controls protrusion positions of the support lifters in accordance with turning operation of the lifter.   
     
     
         9 . The die device according to  claim 1 ,
 wherein the undercut region of the lower die includes:   a movable die part that moves in such a direction as to release an undercut; and   a fixed die part having a portion that remains as an undercut in relation with the workpiece even in a state in which the movable die part moves to perform release,   the die device further comprising support lifters that advance and retreat in a direction along the press direction,   wherein the support lifters are provided in at least each one of a turning direction and a counter-turning direction of the lifter with the lifter interposed therebetween,   the die device comprising a control device that controls protrusion positions of the support lifters in accordance with turning operation of the lifter,   wherein the support lifters are each provided with a sliding member for enhancing sliding performance between the workpiece and the support lifter, at a portion that comes into contact with the workpiece.   
     
     
         10 . The die device according to  claim 1 ,
 wherein the undercut region of the lower die includes:   a movable die part that moves in such a direction as to release an undercut; and   a fixed die part having a portion that remains as an undercut in relation with the workpiece even in a state in which the movable die part moves to perform release,   the abutting part is provided with a vacuum cup,   the die device further comprising support lifters that advance and retreat in a direction along the press direction,   wherein the support lifters are provided in at least each one of a turning direction and a counter-turning direction of the lifter with the lifter interposed therebetween,   the die device comprising a control device that controls protrusion positions of the support lifters in accordance with turning operation of the lifter, wherein   the support lifters are each provided with a sliding member for enhancing sliding performance between the workpiece and the support lifter, at a portion that comes into contact with the workpiece.