Blanking is a production technology of parts with certain shape, size and performance by means of the power of conventional or special stamping equipment, so that the plate is directly subjected to defoemation force and deformation in the mold.
Fine blanking is a kind of material processing method developed on the basis of blanking. It is through improving the guiding accuracy, reducing the gap between the die and the die, increasing the reverse pressure and V-ring blank holder and other technological measures, resulting in the realization of precision stamping under the condition of strong three-way compressive stress.
The essential difference between blanking and fine blanking is that ordinary stamping can not effectively avoid the tear of section when blanking, and fine blanking is trying to restrain the tear of sheet metal when blanking.
Blanking can be processed almost any material, as long as the strength of the die steel is enough, the press pressure is enough.But the materials used for fine blanking need to have good plasticity, low yield ratio and high elongation, also need to have good microstructure.
The difference berween blanking and fine blanking is also the requirement of stamping equipment and the accurancy of the required stamping parts. You can choose to use fine blanking which required high accuracy of stamping parts and large amount of stamping parts.On the contrary, if the accuracy of stamping parts is not too high, and is pressed by ordinary sheet metal, choose blanking, which needs to be selected according to its own stamping characteristics.