Applications : Stamping

Cold or hot stamping with mechanical press


Mechanical stamping is a process for forming parts that requires machines such as a mechanical press and suitable tools. The principle is based on the plastic deformation of the material (usually a metal), which consists of stretching or shrinking the sheet to obtain the desired shape.

A distinction is made between cold stamping, which is carried out at room temperature, and hot stamping, which is carried out with a part heated to about 800°C for mild steel.

Cold stamping is the most commonly used method of operation for the production of large or very large quantities of parts requiring only powerful unilateral action. Indeed, the cost price of the operation performed is extremely low considering the very large number of parts produced associated with a very short manufacturing time. The implementation of this type of tool is quite fast and allows the production of parts as soon as the tool is installed and adjusted on the press table.

Cold stamping can be carried out with a pneumatic press (up to 6 tons), or hydropneumatic presses (up to 30 tons) but for large production quantities, mechanical presses are more suitable. Their striking power and speed of execution enable them to achieve much higher productivity than pneumatic and hydropneumatic presses.

EMG mechanical presses can be equipped, at the customer's request and according to specifications, with any special adaptations required to optimize production:

Some examples of possible adaptations on EMG presses:
  •     A lower ejection system (pneumatic or mechanical) to release the part or the part that has just been manufactured.
  •     A system for lubricating production at each press stroke.
  •     A blowing system in the tool.
  •     A material transport system before and after cutting.
  •     A cutting system for scrap at the exit of the tool.
  •     An automatic screen system that physically protects the operator during typing.
  •     An evacuation control of the manufactured parts or the produced scrap.
  •     Specially designed protections for the geometry of the manufactured parts.
  •     Intelligent protections that guarantee the safety of operators and automate the departure of the press.
  •     The possibility of varying the speed of the slide's movement during striking.
  •     The adaptation of a PLC that will be able to manage the press according to its environment in a complex production line.