Mechanical Engineering - Workshop Technology - Discussion

The correct answer is piercing.

Piercing is the operation of cutting a cylindrical hole in a sheet of metal using a punch and die. The punch is pressed through the metal, creating a hole, while the die supports the metal and helps to shape the hole.

Here's why the other options are incorrect;
- Shearing: Shearing is a cutting operation that uses a shear blade to cut a straight line in a sheet of metal.
- Punching: Punching is a general term that refers to the use of a punch and die to cut or shape a hole in a sheet of metal, but it can include various operations like piercing, blanking, and more.
- Blanking: Blanking is the operation of cutting a flat shape or profile from a sheet of metal using a punch and die, but it does not specifically involve cutting a cylindrical hole.

=> Piercing is a common operation in sheet metalworking and is often used to create holes for bolts, rivets, or other fasteners.

In the piercing operation the small holes are cut where in the punching the optimum standard holes are cut.

Example of piercing is creating holes on the electronic circuit to place the electronic small component.

Puching is the right answer because in question asking about cylindrical hole not an only hole. Piercing is a process making any kind of hole instead cylindrical hole.

Piercing is operation for cutting hole other than circular shape. And punching is cutting hole of circular shape in sheet metal.

Punching is correct please refer to RS Khurmi objective book page no. -671 question no. -123 workshop technology.

Option B is wrong. Correct answer is option C (Piercing is for making hole other than cylindrical hole).

Piercing and punching is the same thing.

In piercing cylindrical holes are treated as scrap.

The Answer is option C punching belongs to circular, piercing belongs to other than circular.

Option C is correct because the piercing is punch hole other than cylindrical.