Workshop Technology
In sheet metal blanking, shear is provided on punches and dies so that

Good cut edge is obtained
Warping of sheet is minimized
Cut blanks is straight
Press load is reduced

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Workshop Technology
Lancing is the operation of

Removal of metal to the desired shape from the edge of a plate
Bending a sheet of metal along a curved axis
Cutting a sheet of metal in a straight line along the length
Cutting a sheet of metal through part of its length and then bending the cut portion

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