What is the effect of blanking clearance on the dimensional accuracy of stamped parts?

   The blanking gap has an important influence on the dimensional accuracy of stamped parts, which is mainly reflected in the following aspects:
    Springback after punching

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        When the gap is too large, the material will have larger tensile deformation in the blanking process, and the springback will increase after the blanking is completed, resulting in the dimensions of the stamped part being smaller than expected.
        When the gap is too small, the material is over extruded and the rebound after blanking is smaller, but it may make the dimensions of the stamped part larger than expected.
    Friction between the mold and the material

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        A gap that is too small increases the friction between the die and the material, which not only increases the punching force, but also leads to increased wear of the die, which affects the dimensional accuracy of the die, and thus the dimensional accuracy of the stamped part.
    Deformation during blanking
        Too large a gap is likely to cause excessive stretching and bending deformation of the material during blanking, resulting in uneven edges and deviations in the dimensions of the stamped parts.
        Too small a gap will cause extrusion deformation of the material, which may also lead to non-conformity of the dimensions of the stamped parts.

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