Using a CNC program, the shape of the holes punched can be anything from a simple circle or rectangle, to special shapes to suit specific designs. Complex sheet metal component shapes can be produced by using a combination of single hits and overlapping geometries.
Most turret punches are CNC-controlled and automatically position the metal sheet beneath the tool or programmed selection of a range of up to sixty tools which can be rotated as needed. A CAM (Computer Aided Manufacturing) process converts the metalwork design into the number of individual punch operations required.
The CNC punch is extremely fast at producing repetitive shapes, achieving up to 600 strokes per minute. A typical component (such as the side of a computer case) can be cut to high precision from a blank sheet in under 15 seconds in this manner.
By using this large number of strokes and employing several different tools in turn, a Turret Press can make a wide range of parts with out having to create specialised press tools for a specific task. This allows for rapid prototyping to begin quickly without tooling delays, saving time and money.