The Basics of CNC Punching

CNC punching is one of the key techniques that we use here at DB Sheetmetals to shape custom metal forms for a wide variety of industries. Our production team uses CNC punching in Suffolk to create a variety of perfectly patterned customized shapes out of varying thicknesses of sheet metal. But, how does the sheet metal punching process work?

Modern metal punching is carried out using heavy machinery, such as the Amada EM3510NT, which we utilise here at DB Sheetmetals.

How It’s Done

1. The sheet metal being punched is inserted between the punch and a die.

2. The punch moves downward and into the die, causing the sheet metal underneath the punch to be sheared away from the surrounding material.

3. Any cut metal is collected into a container for later use/recycling.

4. This is repeated many times until the desired pattern is reached on the sheet metal.

One particular method that is frequently utilised in our CNC punching in Suffolk is known as 'nibbling.' this process involves the creation of a long series of very small holes one at a time. These connected holes can create customized outlines to fit specific needs. In a lot of cases, however, here at DB Sheetmetals, engineers may use laser cutting instead of the CNC punching process to achieve these shapes because it places less physical stress on the workpiece.

What Affects Punch Quality?

The quality of each punch is determined by a few significant factors, including:

• The size/shape of the die and punch press;

• The amount of force applied

• The condition of the die and punch press

• The thickness of the metal being punched

The ram position accuracy and hit rates, (the Amada EM3510NT has the highest real-world hit rates and ram positioning accuracy on the market)

To find out more about whether CNC punching in Suffolk is the right choice for you and your metal needs, then call our friendly team on 01440 706218 or read more about our CNC punching here.