Novel copper bar chamfer mould that punches a hole

The utility model provides a novel copper bar chamfer mould that punches a hole. The mould includes die carrier, fixed plate, stripper, lower die carrier and lower mould, is equipped with the terrace die on the stripper, corresponds to be equipped with die mold insert, its characterized in that on the lower mould: left and right side clamp splice and cushion in that the both sides of die mold insert are equipped with reset spring respectively between left and right side clamp splice and die mold insert, seted up side kicking block extrusion hole respectively in the outside of two cushions, install left and right side kicking block in terrace die both sides, and left and right side kicking block sets up in the extrusion of the side kicking block with the every side relative position in hole, and when punching a hole to the processing work piece, the side kicking block that the embedding of left and right side kicking block corresponds the side extrudees downtheholely, be equipped with the round boss around the reason on the die hole of die mold insert, the lateral surface of boss is the inclined plane. The utility model discloses ensure to warp at the in-process width of the workpiece disappearance that punches a hole to carry out the chamfer to the burr face when punching a hole, solved the burr and pierced through the problem that the insulating layer formed the short circuit.