How much aluminum sheet blanking die gap should have?
Blanking pieces obtained satisfactory quality. The gap is small die life is also smaller, but better quality of parts of. The gap is large die life is also large, but the quality was poor parts.
When reasonable blanking die gap, it is possible to make the vertical cracks in the material produced at the punch population overlap each other in the same position. Thus obtained a large blanking section with bright region, while the collapse of the fracture surfaces and burr smaller taper moderate, relatively smooth surface of the part.
Blanking Die reasonable gap: general thickness of the material in the punching clearance value less than 2mm blanking die can take less than 10%, if the requirements of small glitches, you can get to about 5% (bilateral gap).
