Question

Consider the following statements related piercing and blanking
1. Shear on the punch reduces the maximum cutting force
2. Shear increases the capacity of the press needed
3. Shear increases the life of the punch
4. Total energy needed to make the cut remains unaltered due to provision of shear.
Which of the above statements are correct?

• A. $1$ and $2$
• B. $1$ and $4$
• C. $2$ and $3$
• D. $3$ and $4$

Answer 1

The correct option is B $1$ and $4$

Shear on punch reduces the maximum cutting forces but total energy required to make the cut remains unchanged