Press die for simultaneous forming of bending and curling

Abstract

A press die for combination forming, capable of simultaneously performing a bending process and a curling process, the press die including a first die installed so as to perform a vertical movement, a second die configured to support a workpiece from a lower side of the first die, a moving apparatus configured to move the workpiece being supported by the second die, a stripper configured to hold the workpiece being moved by the moving apparatus such that the workpiece is mounted on the second die, a third die provided on the first die to bend the workpiece being mounted on the second die, and a fourth die provided on the second die to curl the workpiece being completed with the bending.

What is claimed is: 
     
         1 . A press die for simultaneous combination forming of a bending and a curling, the press die comprising:
 a first die installed so as to perform a vertical movement;   a second die configured to support a workpiece from a lower side of the first die;   a moving apparatus configured to move the workpiece being supported by the second die;   a stripper configured to hold the workpiece being moved by the moving apparatus such that the workpiece is mounted on the second die;   a third die provided on the first die to bend the workpiece being mounted on the second die; and   a fourth die provided on the second die to curl the workpiece being completed with the bending.   
     
     
         2 . The press die of  claim 1 , wherein the moving apparatus comprises:
 a cam driver fixed to the first die and configured to move vertically according to the vertical movement of the first die;   a cam support portion provided to correspond to the cam driver and slidably installed at the second die;   a cam slider provided so as to perform a sliding movement in linkage with the cam support portion;   a bending punch fixed to the cam slider and configured to support the workpiece such that the workpiece is mounted on the bending punch.   
     
     
         3 . The press die of  claim 2 , wherein the moving apparatus comprises a moving plate movably connecting the cam support portion to the cam slider. 
     
     
         4 . The press die of  claim 2 , wherein the moving apparatus further comprises a stopper configured to limit the movement of the cam slider. 
     
     
         5 . The press die of  claim 2 , wherein the moving apparatus further comprises a punch holder configured to move the fourth die vertically. 
     
     
         6 . The press die of  claim 5 , further comprising a gas spring configured to transmit a power to move the punch holder vertically. 
     
     
         7 . The press die of  claim 2 , wherein the moving apparatus comprises a returning member configured to return the cam slider to an original position of the cam slider when the workpiece is completed with processing. 
     
     
         8 . The press die of  claim 2 , wherein:
 the cam driver is provided at a lower surface thereof with a first inclination portion, and   the cam support portion is provided with a second inclination portion corresponding to the first inclination portion.   
     
     
         9 . The press die of  claim 8 , wherein the cam slider moves when the first inclination portion presses the second inclination portion when the first die is lowered, and
 as the cam slider moves, the workpiece is fixed to the bending punch and the stripper.   
     
     
         10 . The press die of  claim 1 , wherein the third die comprises a bending portion to perform a bending process on the workpiece. 
     
     
         11 . The press die of  claim 10 , wherein the third die is lowered as the first die is lowered, so as to bend the workpiece fixed to the bending punch and the striper, thereby performing the bending process. 
     
     
         12 . The press die of  claim 1 , wherein the fourth die comprises a curling portion to perform a curling process on the workpiece. 
     
     
         13 . The press die of  claim 12 , wherein the fourth die is lowered as the first die is lowered, so as to curl the workpiece completed with the bending process in a state of being fixed to the bending punch and the stripper, thereby performing the curling process. 
     
     
         14 . The press die of  claim 1 , wherein the press die is provided in a rectangular shape, and the bending process and the curling process are performed at eight forming portions comprising four plane forming portions and four edge forming portions. 
     
     
         15 . The press die of  claim 1 , wherein an ejection is performed at the four edge forming portions after an ejection is performed at the four plane forming units among the eight forming units. 
     
     
         16 . A press die for simultaneous combination forming of a bending and a curling, the press die comprising
 a first die installed so as to perform a vertical movement;   a cam driver fixed to the first die, and configured to move vertically according to the vertical movement of the first die;   a second die configured to support a workpiece from a lower side of the first die;   a cam support portion provided so as to correspond to the cam driver, and slidably installed at the second die;   a cam slider provided so as to perform a sliding movement in linkage with the cam support portion;   a bending punch fixed to the cam slider, and configured to support the workpiece such that the workpiece is mounted on the bending punch;   a stripper configured to hold the workpiece being moved by the cam slider such that the workpiece is mounted on the bending punch;   a third die mounted on the first die, and having a bending portion to bend the workpiece being mounted on the bending punch; and   a fourth die provided on the second die, and having a curling portion to curl the workpiece being completed with the bending.   
     
     
         17 . The press die of  claim 16 , further comprising a moving plate movably connecting the cam support portion to the cam slider. 
     
     
         18 . The press die of  claim 16 , further comprising a stopper configured to limit the movement of the cam slider. 
     
     
         19 . The press die of  claim 16 , further comprising a punch holder configured to move the fourth die vertically. 
     
     
         20 . The press die of  claim 19 , further comprising a gas spring configured to transmit a power to move the punch holder vertically. 
     
     
         21 . The press die of  claim 16 , further comprising a returning member configured to return the cam slider to an original position of the cam slider when the workpiece is completed with processing. 
     
     
         22 . The press die of  claim 16 , wherein the press die is provided in a rectangular shape, and the bending process and the curling process are performed at eight forming portions comprising four plane forming portions and four edge forming portions. 
     
     
         23 . The press of  claim 22 , wherein an ejection is performed at the four edge forming portions after an ejection is performed at the four plane forming units among the eight forming units.