Mechanical Engineering - Workshop Technology - Discussion

Please, explain it clearly.

How? Please explain.

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

Right @Nishad.

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.

@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".