Workshop Technology
In sheet metal work, he cutting force on the tool can be reduced by

Increasing the hardness of die
Grinding the cutting edges sharp
Providing shear on tool
Increasing the hardness of tool

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Workshop Technology
Piercing is an operation of cutting

A flat sheet to the desired shape
A hole (other than cylindrical) in a sheet of metal by the punch and the die
A cylindrical hole in a sheet of metal by the punch and the die
A number of holes evenly spaced in a regular pattern on a sheet of metal

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Workshop Technology
Notching is the operation of

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
Removal of metal to the desired shape from the edge of a plate

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Workshop Technology
In a hot chamber die casting machine

Nonferrous alloys with low melting temperature are casted
Ferrous alloys with high melting temperature are casted
Nonferrous alloys with high melting temperature are casted
Ferrous alloys with low melting temperature are casted

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