Press die

Abstract

A press die including a first die, a second die disposed opposite to the first die to perform a press work on a panel together with the first die, a drawing unit configured to hold the panel, a trimming unit configured to cut the panel, and a fluid pressure controlling unit configured to selectively deliver fluid pressure to one of the drawing unit and the trimming unit, thereby operating both of the drawing unit and the trimming unit even with a small fluid pressure by selectively delivering fluid pressure to one of the drawing unit and the trimming unit.

What is claimed is: 
     
         1 . A press die, comprising:
 a first die;   a second die disposed opposite to the first die to perform a press work on a panel together with the first die;   a drawing unit configured to hold the panel;   a trimming unit configured to cut the panel; and   a fluid pressure controlling unit configured to selectively deliver fluid pressure to one of the drawing unit and the trimming unit.   
     
     
         2 . The press die of  claim 1 , wherein one of the first die and the second die is moved toward the other one of the first die and the second die. 
     
     
         3 . The press die of  claim 1 , wherein:
 the first die comprises a first core provided with a first die surface having a shape that corresponds to one side surface of a product to be manufactured;   the second die comprises a second core provided with a second die surface having a shape that corresponds to other side surface of the product to be manufactured, the second core provided with a drawing surface to hold the panel; and   the drawing unit comprises a drawing member disposed opposite to the drawing surface so that the panel is held in between the drawing member and the drawing surface, and a drawing actuator configured to move the drawing member according to the delivered fluid pressure.   
     
     
         4 . The press die of  claim 3 , wherein the drawing actuator comprises a drawing cylinder to which fluid pressure is delivered, and a drawing piston movably installed at the drawing cylinder so as to move according to an inside pressure of the drawing cylinder. 
     
     
         5 . The press die of  claim 1 , wherein:
 the trimming unit comprises a trimming member penetrating through one of the first core and the second core and protruding toward the other one of the first core and the second core, and a trimming actuator configured to move the trimming member according to the delivered fluid pressure,   one of the first core and the second core comprises a penetrating hole at which the trimming member is installed, and   the other one of the first core and the second core comprises a trimming hole provided at a position that corresponds to the penetrating hole.   
     
     
         6 . The press die of  claim 5 , wherein the trimming actuator comprises a trimming cylinder to which fluid pressure is delivered, and a trimming piston movably installed at the trimming cylinder so as to move according to an inside pressure of the trimming cylinder. 
     
     
         7 . The press die of  claim 1 , further comprising:
 a first delivery tube connecting the drawing unit to the fluid pressure controlling unit; and   a second delivery tube connecting the trimming unit to the fluid pressure controlling unit.   
     
     
         8 . The press die of  claim 1 , wherein the fluid pressure controlling unit is configured to deliver fluid pressure from one of the drawing unit and the trimming unit to the other one of the drawing unit and the trimming unit. 
     
     
         9 . A press die to perform a press work on a panel, comprising:
 a first die;   a second die disposed opposite to the first die;   a drawing unit to hold the panel;   a trimming unit to cut the panel; and   a fluid pressure controlling unit to selectively deliver fluid pressure to one of the drawing unit and the trimming unit.   
     
     
         10 . The press die of  claim 9 , wherein the second die includes a drawing surface to hold the panel, and
 the drawing unit comprises a drawing member disposed opposite to the drawing surface so that the panel is held in between the drawing member and the drawing surface, and a drawing actuator to move the drawing member according to the delivered fluid pressure.   
     
     
         11 . The press die of  claim 10 , wherein the drawing actuator comprises:
 a drawing cylinder to which fluid pressure is delivered; and   a drawing piston movably installed at the drawing cylinder so as to move according to an inside pressure of the drawing cylinder.   
     
     
         12 . The press die of  claim 9 , wherein the trimming unit comprises a trimming member penetrating through one of the first and second dies and protruding toward the other one of the first and second dies, and a trimming actuator to move the trimming member according to the delivered fluid pressure,
 one of the first and second dies includes a penetrating hole at which the trimming member is installed, and   the other one of the first and second dies includes a trimming hole provided at a position that corresponds to the penetrating hole.   
     
     
         13 . The press die of  claim 12 , wherein the trimming actuator comprises:
 a trimming cylinder to which fluid pressure is delivered; and   a trimming piston movably installed at the trimming cylinder so as to move according to an inside pressure of the trimming cylinder.   
     
     
         14 . The press die of  claim 9 , further comprising:
 a first delivery tube connecting the drawing unit to the fluid pressure controlling unit; and   a second delivery tube connecting the trimming unit to the fluid pressure controlling unit.