Mechanical Engineering - Workshop Technology - Discussion

The correct answer is: providing shear on the tool.

In sheet metal work, providing shear on the tool, also known as "shear angle" or "cutting clearance", can significantly reduce the cutting force required. This is because the shear angle allows the tool to cut the metal more efficiently, with less friction and resistance.

Here's why the other options are incorrect:

- Grinding the cutting edges sharp (option 1) can increase the cutting force, as a sharper edge can dig deeper into the metal, requiring more force.
- Increasing the hardness of the tool (option 2) can improve its durability, but it may not necessarily reduce the cutting force.
- Increasing the hardness of the die (option 4) is not directly related to reducing the cutting force on the tool.

Providing shear on the tool is a common technique used in sheet metal cutting to reduce the force required, improve tool life, and enhance the overall cutting process.

I think option C is correct.

Reduce the cutting force by giving the shear angle on the tool and also give a double shear angle (it is used more than a single shear angle).

And one method is used for reducing the cutting force by the steeped punch.

Punch is made in steps.

Option C is the right answer.

C is the right answer. I too agree.

The capacity of the machine can reduce by providing shear on the tool. Shear on tool does not affect the work done of the press. Shear provide on the tool is correct.

Providing shear on tool is correct one.

The Correct answer is C by proving shear the force is reduced.

C is correct. I too agree.

A option is right.

As f = blanking area * shear stress.

As area decreases, force will also decreases.

Yes, shear angle is the right answer.