Abstract: An extrusion system including a press with a chassis, a slider mounted to be mobile vertically on the chassis and an actuating arrangement that moves the slider, a hollow container receiving a billet and having at one end an extrusion die and at the other end a piston mobile in translation horizontally in the container, and a movement transformation system arranged between the slider and the piston to transform the vertical movement in translation of the slider into horizontal movement in translation of the piston. With an arrangement of this kind, it is possible to use a press of higher power.

Abstract: The method for tracking deformation of a metal part subjected to a pressure force (F) includes the steps of measuring the displacement (d) of the metal part in the deformation zone, of measuring the intensity of the pressure force (F), of calculating, during a first period, the constant ratio (?) between the intensity of the pressure force (F) and the displacement (d) of the metal part, and of determining, during a second period, displacement values (de) and (dp) related respectively to an elastic deformation and to a plastic deformation of the metal part from the constant ratio (?) and a displacement (da) measured during the said second period.

Abstract: The method for tracking deformation of a metal part subjected to a pressure force (F) comprises the steps of measuring the displacement (d) of the metal part in the deformation zone, of measuring the intensity of the pressure force (F), of calculating, during a first period, the constant ratio (?) between the intensity of the pressure force (F) and the displacement (d) of the metal part, and of determining, during a second period, displacement values (de) and (dp) related respectively to an elastic deformation and to a plastic deformation of the metal part from the constant ratio (?) and the displacement (d) measured during the said second period. Use in particular for straightening or forming a metal part.