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During blanking, a metal workpiece is removed from the metal strip or sheet through punching. A metal punch is forced into a die, shearing the steel blank from the larger metal piece. This is typically a high-speed, continuous process that creates defects on trimmed surfaces.

The blanking process can create residual cracks or hardening along the blanked edges, or cause edge deformation and burring if the clearance – the distance between the punch and the die – is excessive.

An automated edge inspection system will quickly alert operators to any defects in the blanking process, supporting quality control and ensuring the blanks created are fit for purpose. As the blanks are formed from a continuous web, process monitoring supports efficient operation.
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