Packaging steel strip blanking clearance for the adaptability of the thickness of the material

Packaging steel strip for blanking clearance material adaptability of different thickness, different material thickness of sheet metal, in stamping process requirements are appropriate to the reasonable clearance. However, the material of the same thickness, the clearance value is not a fixed value, it is to permit a range, minimum and maximum space namely. Medium hardness material, for example, its clearance for 9 - the thickness of the material 12%; Press 0. 5 mm silicon steel sheet, generally take 0. 04 - 0. 6 mm ( Dual and clearance) 。 However, when the gap is 0. 01 or 0. 8 mm, as long as in the assembly of convex and concave die ensure uniform clearance, also can ensure the quality of blanking pieces. Often refer to choose 0 at this time. 01 mm clearance for the small gap, 0. 8 mm for large gap. Clearance value is too large or too small, will be the quality of parts size accuracy, the cross section and blanking force, if small changes of parts size and cross section, and strict quality awareness, can use general can change the properties of the die clearance, enlarge its application scope, through a set of complete to thickness were small parts of the tools of stamping processing. For example, the thickness of 0. 5 - 2 mm range of sheet metal, the clearance value can press 1. 2 mm is selected ( 0. 108 - 0. 156). That strike 0. The material thickness for 5 mm clearance, coining 2 mm thickness for the small gap. If use the die people coining 0. 1 mm thick glass fiber cloth, insulation can also be a multilayer placement for stamping processing. In short, in meet the product requirements, if the above method is allowed and applicable. If the stamping quality of strict, the need to change different size of intensive, combination and adjust the best reasonable clearance. This method, also used in the clearance of the new material test. It should be pointed out that general die is within the scope of a certain material thickness gm ( As a general rule, be 0. 5 - 2 mm) 。 If the material is too thin, small clearance, mould manufacturing precision demand is high, manufacture is difficult; Material is too thick, the die structure are required to have a certain strength, so as not to damage the mould. In general mould steel words commonly type allows the cutting material thickness range, in order to protect the mold from damage due to improper use.