Punch Press

Abstract

The invention relates to a punch press, in which compressive machining is performed on a blank. The punch press includes tools, a ram, a drive element of the ram, and a precise-positioning operating device for moving the drive element of the ram, as well as a precise-positioning moving element for moving the ram in the direction of the tool row to the location of the desired tool. According to the invention the moving element of the ram is arranged to operate using the same moving operating device of the ram.

1 . Punch press, in which compressive machining is performed on a blank, which punch press includes:
 a feed line and an exist line for the blanks,   a tool series, which comprises several tools and a tool holder, in which tools are placed in a row, and in each tool of the tool series there is a plunger and a stop, between which the blank to be machined is arranged to be fed from the feed line,   a ram, which has a rest position and a work position, which ram has a first end and a second end, which first end of the ram is arranged in contact with the plunger is the work position, and which second end of the ram is arranged to be the drive head of the ram to move the plunger in order to perform the machining event,   a drive element of the ram, which is arranged to move in a direction perpendicular to the direction of movement of the ram, by means of which the drive element is arranged to direct force onto the drive head of the ram, in order to drive the ram,   a precise-positioning operating device for moving the drive element of the ram,   a precise-positioning moving element for moving the ram in the direction of the tool row to the location of the desired toll,   return means for returning the ram to the rest position,   positioning means for aligning the selected tool and the blank to be machined relative to each other in the work plane, which is at right angles to the direction of movement of the ram, characterized in that the said moving element of the ram is arranged to operate using the same said moving operating device of the ram.   
   
   
       2 . Punch press according to  claim 1 , characterized in that the precisely positionable operating device is a rolling screw. 
   
   
       3 . Punch press according to  claim 1 , characterized in that the rolling screw is a ball-race screw. 
   
   
       4 . Punch press according to  claim 1 , characterized in that the punch press includes a machine body and an operating-device body, and the positioning devices comprise linear operating-device body moving devices and linear feed devices, which are at right angles to each other. 
   
   
       5 . Punch press according to any of  claim 1 , characterized in that the drive element and the drive head of the ram are arranged to be formed of a roller and a sloping surface. 
   
   
       6 . Punch press according to  claim 1 , characterized in that the drive element of the ram is a rolling element. 
   
   
       7 . Punch press according to  claim 6 , characterized in that the rolling element is a roller nose. 
   
   
       8 . Punch press according to  claim 1 , characterized in that the said moving element of the ram comprises the said operating device and of the grip means belonging in connection with it. 
   
   
       9 . Punch press according to  claim 1 , characterized in that the ram has at least three operating positions, which are a rest position, a work position, and a transfer position. 
   
   
       10 . Punch press according to  claim 9 , characterized in that the grip elements include a cylinder in connection with the ram, by means of which the ram is raised to the transfer position.