Punch assembly of cnc punch press machine

Abstract

A punch assembly of CNC punch press machine is disclosed. A press type of lock system is provided between the guide sleeve and the lock ring of the punch assembly of CNC punch press machine. When it needs to adjust the length of the plunger chip, the lock ring and the guide sleeve are locked by the locking mechanism, bringing the entire mechanism into a state of adjustment, and pinching the upper lock ring by hand is not necessary. When the adjustment of the length of the plunger chip is achieved, press the hook pin to unlock the locking mechanism, and lock ring will be reset. Thus, the operation of adjustment is easy and convenient.

What is claimed is: 
     
         1 . A punch assembly of CNC punch press machine, comprising:
 a guide assembly, comprising:   a guide sleeve;   a lock ring, movably sleeved outside an upper part of the guide sleeve, wherein two symmetric circular grooves are provided on the lock ring;   two shotpins, one end of which is fixed to the guide sleeve, and the other end of which is placed into the circular grooves;   pressure springs, respectively mounted in two symmetric circular grooves on outer cylinder of the upper part of the guide sleeve; and   two poke pins, one end of which is fixed to the lock ring, and the other end of which is inserted into one end of the springs of the circular grooves of the guide sleeve;   wherein a press type of lock system is provided between the guide sleeve and the lock ring, the press type of lock system comprises a hook pin and a spring, the hook pin is provided with a latch hook, the guide sleeve is provided with a cylinder hole, the cylinder hole is configured to cooperate with the hook pin in a manner of sliding fit, and the spring is set in the cylinder hole; a flat groove is provided on a lower end surface of the lock ring, which allow the hook pin slide rather than rotate, and a groove is provided on an inner end face of the flat groove matching the latch hook of the hook pin.   
     
     
         2 . The punch assembly of CNC punch press machine according to  claim 1 , wherein a forepart of the hook pin is flat circular, the lower part of the hook pin is provided with a serrated latch hook, and a tail part of the hook pin is cylinder-shaped.