Side punching mechanism with movable guide block

Abstract

A side punching mechanism with a movable guide block includes a slider base disposed in a lower die. A slider is disposed on the slider base, a side punching pin is disposed at a front end of the slider, a movable guide block connected to the slider base in a sliding fit manner is disposed in front of the slider, the movable guide block includes a concave movable base and a boss disposed on the movable base, a front end of the boss protrudes forwards and extends out from the movable base, the front end of the boss has a shape of an indented arc, the boss is disposed at the center of the movable base, a through-hole is formed in the boss, and the slider slides on the slider base along a concave space of the movable base to drive the side punching pin to move in the through-hole.

What is claimed is: 
     
         1 . A side punching mechanism with a movable guide block, comprising a slider base disposed in a lower die, wherein a slider is disposed on the slider base, a side punching pin is disposed at a front end of the slider, a movable guide block connected to the slider base in a sliding fit manner is disposed in front of the slider, the movable guide block comprises a concave movable base and a boss disposed on the movable base, a front end of the boss protrudes forwards and extends out from the movable base, the front end of the boss has a shape of an indented arc, the indented arc fits with an outer-surface arc of the product, the boss is disposed at the center of the movable base, a through-hole for the side punching pin to enter is formed in the boss, the slider slides on the slider base along a concave space of the movable base to drive the side punching pin to move in the through-hole, the movable base comprises two L-shaped bent side wings disposed at the bottom of the boss, and the side wings each are bent into an L shape towards the slider to enclose the concave space. 
     
     
         2 . The side punching mechanism with a movable guide block according to  claim 1 , wherein an inclined face is disposed at a rear end of the movable base. 
     
     
         3 . The side punching mechanism with a movable guide block according to  claim 1 , wherein a return through-hole is formed in the movable base, a spring is disposed in the return through-hole, one end of the spring abuts against a cutting edge, the end abutting against the cutting edge of the spring is positioned below a flange of the product, and the other end of the spring is disposed in the slider and configured to coordinate in returning the slider. 
     
     
         4 . The side punching mechanism with a movable guide block according to  claim 3 , wherein the return through-hole is positioned under the boss. 
     
     
         5 . The side punching mechanism with a movable guide block according to  claim 2 , wherein the inclined face of the movable base is mated with an inclined face of a side-push inclined punch fixed to a floating plate, and the side-push inclined punch is disposed in an inner/outer splitting manner and comprises an inner-side-push inclined punch and an outer-side-push inclined punch wrapping around the inner-side-push inclined punch. 
     
     
         6 . The side punching mechanism with a movable guide block according to  claim 5 , wherein an inclined face of the outer-side-push inclined punch is mated with the inclined face of the movable base. 
     
     
         7 . The side punching mechanism with a movable guide block according to  claim 6 , wherein an inclined face of the inner-side-push inclined punch is mated with an inclined face of the slider. 
     
     
         8 . The side punching mechanism with a movable guide block according to  claim 1 , wherein a distance by which the boss extends out from the movable base is greater than a width of the flange of the product. 
     
     
         9 . The side punching mechanism with a movable guide block according to  claim 1 , wherein a counterbore is formed in each of the side wings, and a linear spring is disposed in the counterbore.