At present,sheet metal prototyping punching is the most efficient method to produce precision fabricated 

metal components with many holes.Punching is often the cheapest way to create holes in sheet metal in

medium to high production volumes.

In order to obtain the desired shape of the metal ,a machine is need to press a shape through a sheet of 

metal in the process of sheet metal prototyping punching. 

By using a turret, a computer numerical controlled machine,the process will be done.The machine use 

pneumatic,hydraulic,or electrical power to press the shape with huge force to shear the metal sheet.The

shape is formed by pressing the material against a die with enough force.

The shear forces generated between the material and die separate the material into the desired shape.But

the desired shape can not be created because burred edges and rough surfaces are formed. These edges

and surfaces must need further process until the desired  shape is finally achieved. 

Sheet Metal Prototyping Punching Process