Convex, concave die gap between the control and adjustment of the method
Convex, concave die clearance control, should according to die structure, Precision stamping parts clearance size, blanking pieces of quality and practical assembly condition to selected. Convex, concave die gap between the control and adjustment method have the following kinds.
（1）Pervious to light method
Will convex, concave die after molmerged, shone a light on the underside, observe the convex, concave die around through light and distribution to judge the size of the clearance and uniformity. If not even, to adjust to evenly between fixed again, this method is suitable for small gap plate stamping die.
Will convex, concave die after molmerged, convex, concave die into the thickness of unilateral clearance feeler convex, concave die gaps in each direction. Precisionstamping parts Then tighten the screw on mode. Finally put paper to stamping and will last mould seat and fixed on board with drilling, reaming positioning pin hole, and at a pin location.
Gasket adjustment method is simple, convenient, clearance is used widely. As shown in figure 1 shows, the mat with good contour mat iron, will gaskets wrapped in the punch to the punch into the concave mould, observe the convex, concave die clearance condition. If clearance does not even, with striking the protruding models of fixed plate method clearance adjustment, then tighten the screw on mode. Finally put paper to stamping, observation on paper cutting around burr and even rate to judge whether clearance convex, concave die even, to adjust the gap until cutting burr uniform so far. Finally the mould seat and the plate with drilling, reaming positioning pin hole, and enter the pin location. This method widely used cutting materials focusing thick large clearance and bending stamping, deep drawing mould clearance control.
(4) Chemical method
When the convex, concave die complex shape, the use of the above several methods more difficult to adjust the gap, the chemical method can be used to control the gap, the plating method is used. Plating method is the punch in the work surface coated with copper or zinc instead of washers. The plating thickness and unilateral gap is same, Precisionstamping parts blade people concave die hole, and check the move without block phenomenon can assembly tighten. Coating in use process will die fall off naturally, need not removed. This uniform coating, can improve the uniformity of assembling clearance.