Pressing, also known as stamping, is the process of putting a flat piece or sheet of metal into a press where the die or tool forms the metal into a new shape. As with upset forging, this can either be done by using a single press of the machine, where each press produces the desired end product, or it can be done in stages using multiple presses and a number of different tools.
However, unlike forging, pressing is completed on cold metals and the impact of the blow is a powerful squeeze opposed to a single sudden bash.
The use of tools and dies is extremely important in the pressing operation as this is ultimately the shape that the metal will take. Manufacturers who undertake significant volumes of pressing activity may opt to have an in-house toolroom with toolmakers. Toolmakers are highly skills workers who are capable of producing tools or dies to meet the design needs. This helps to reduce the overall production time as there are no third party delays and if the operation is of a large enough scale, the cost savings could also be substantial.