Updated: Sep 24, 2021
The pad is made of rubber or polyurethane. This rubber pad is placed in a ram of a press. The force applied on the blank by hydraulic cylinder through the ram and rubber pad. First, the blank is placed over the punch called male die. Then, the upper platen called female part is moved to just touch the top surface of the work. After this, the rubber pad. The blunk holder ring is used to distribute uniform pressure throughout the blank. Thus, the required shape is formed on the sheet metal between male and
Process is more economical.
Tooling cost is less.
Many required shapes can be formed in one rubber pad itself.
There is no need of lubricants.
Tool setting time is less.
Deeper shells can be drawn.
Rubber pads will wear out rapidly.
Sharp corners cannot be made accurately.
Production of flanged cylidrical and rectangular cups.
Production of parallel and tapered wall shells.
Production of unsymmetrical shape components.