Mechanical Engineering - Workshop Technology - Discussion

@All

Let me explain:

The statement "In bending operation, the metal takes the shape of a punch" is generally true for many bending operations, but it's not universally accurate for all types of bending. Here's a more precise explanation:

1. In some bending operations, especially those using a punch and die:
- The metal does indeed take the shape of the punch as it's forced into the die.
- This is common in press brake operations and some other forming processes.

2. However, in other bending methods:
- The metal might conform to the shape of a die or form block, rather than a punch.
- Examples include roll bending or three-point bending, where there isn't necessarily a "punch" involved.

3. Additionally, factors like spring back can affect the final shape:
- After bending, the metal may partially return towards its original shape due to elastic recovery.
- This means the final shape isn't always a replica of the punch or die.

A more accurate general statement would be: "In many bending operations, the metal is formed to approximate the shape of the tooling (which may include a punch, die, or form block), subject to material properties and springback effects".

Die and punch are used for bending. If a v-shaped die and punch are used, then the bending is called v-bending.

The answer is incorrect. In bending, the metal takes the shape of the die.

It has to take the shape of the die it is placed on, not the punch.

Please, explain it clearly.

How? Please explain.

Right @Nishad.