In producing a punched hole of $$20mm$$ diameter, the dimension of the punch is ........ given the radial die clearance of $$0.1mm.$$

In a bending operation, If the modulus of elasticity $$E$$ is increased keeping all other parameters unchanged, the spring back will

In blanking operation, the best way to improve the smoothness and squarness of the edges is to

The function of draw bead in the deep drawing operation is to