CNC stamping is a metal processing technology widely used in manufacturing industry. It is also known as "punching" because it involves punching holes on the workpiece. It can be done by hand or by machine, the latter is preferred because it can force holes in hard metal. To learn more about how punching machines work, read on.

Punching knowledge of CNC punching machine

If a processing plant needs to punch one or more metal holes, one or more parts can be punched. Punching is a simple and effective method to make holes on metal workpiece. The workpiece is aligned between the punching tool (usually made of tungsten carbide or similar metal with higher strength) and the die. Once in place, the punch tool is pushed down into the workpiece to remove a piece of metal of the same shape as the mold from the workpiece. If a round die is used, the workpiece will have round holes. If a triangular die is used, the workpiece will have a triangular hole. In any case, punching always produces holes of the same shape as the mold.

How to punch holes by punching machine

In the past, punching was done by hand. Hand punch tools are still available today, and some companies and individuals still use them, but most punching is done by machine. Driven by hydraulic pressure, the machine pushes the punching tool onto and through the workpiece. Below the punch is a die block for a hole of the desired shape. When the press pushes the workpiece, it leaves a hole in the mold shape.

Advantages of NC punching

Stamping is a popular metal processing technology in manufacturing industry, because it has unique advantages over similar processes. According to encyclopedia, this is the most cost-effective process for making holes in metal work pieces. Secondly, punching can produce holes of various shapes. If a manufacturing company needs a hole of a specific shape, it can simply use the mold of that shape. Third, punching is a very fast process. It only takes a few seconds to punch at a time.

Although it is most commonly used for metal work pieces, it can also be used to punch holes in plastic parts. The process is basically the same, it needs to use punching tools and molds to open holes on the plastic workpiece. It is usually used to remove excess plastic from the workpiece at the final stage of assembly.