Press working apparatus

Abstract

A press working apparatus is provided that can prevent interference between the die and the punch and thus obtain a good sheared surface of a product. One embodiment is a press working apparatus comprising a lower mold frame on which a die is mounted, a sheet material being laid on the die; an upper mold frame movable toward and away from the lower mold frame; and a punch mounted on the upper mold frame for carrying out a predetermined press working on the sheet material laid on the die when the upper mold frame approaches proximately to the lower mold frame. Either the die or the punch can be freely displaced in its horizontal plane, and the press working apparatus further comprises a positioning apparatus for setting the relative position of the die and the punch.

1 . A press working apparatus comprising a first mold frame on which a die is mounted, a second mold frame on which a punch is mounted, the first and second mold frames being movable relative to one another in a direction of relative movement, the first and second mold frames further being adapted to carry out press working on a sheet material arranged between the die and the punch, and a positioning apparatus configured to set the relative positions of the die and the punch, wherein one of the die and the punch can be freely displaced in a plane generally perpendicular to the direction of relative movement. 
   
   
       2 . The press working apparatus of  claim 1 , wherein the positioning apparatus comprises guide bars projected from one of the first and second mold frames toward the opposing mold frame, and guide bores formed in the other of the first and second mold frames, the guide bores configured to accept the guide bars therewithin when the first mold frame approaches the second mold frame. 
   
   
       3 . The press working apparatus of  claim 1 , wherein the first and second mold frames are disposed in a generally horizontal plane, and the first mold frame is disposed vertically below the second mold frame. 
   
   
       4 . The press working apparatus of  claim 1 , wherein the die and the punch are respectively connected to the first mold frame and the second mold frame via pinned members secured on the associated mold frame, wherein there is a clearance space between the pinned members and the associated die or punch, and wherein the die or the punch is able to freely displace in a generally horizontal plane by a distance determined by the clearance space. 
   
   
       5 . The press working apparatus of  claim 4  further comprising a retaining member adapted to engage the horizontal and side surfaces of the associated die or the punch for preventing the associated die or the punch from slipping out of associated mold frame. 
   
   
       6 . The press working apparatus of  claim 5 , wherein the retaining member is generally L-shaped. 
   
   
       7 . The press working apparatus of  claim 5 , wherein the punch is adapted to simultaneously perform both outer and inner circumferential punching works. 
   
   
       8 . The press working apparatus of  claim 7 , wherein the punch is adapted to contain scraps from the punching operation therewithin. 
   
   
       9 . The press working apparatus of  claim 1 , wherein the punch is adapted to simultaneously perform both outer and inner circumferential punching works. 
   
   
       10 . The press working apparatus of  claim 9 , wherein the punch is adapted to contain scraps from the punching operation therewithin.