Manufacturing piece of material susceptible to quenching in automotive industry, comprises cutting workpiece during hot stamping phase by punching and at beginning of deep-drawing phase

摘要

The method comprises: cutting a workpiece (P), by punching, during a hot stamping phase, and at beginning of a deep-drawing phase. The cutting is terminated before beginning of the quenching phase in press, and is started before or during the hot stamping phase. The hot stamping phase of the workpiece comprises a first step of relative movement between first and second drawing dies in a first direction formed on a movement path carrying a plastic deformation of the workpiece by hot stamping. The method comprises: cutting a workpiece (P), by punching, during a hot stamping phase, and at beginning of a deep-drawing phase. The cutting is terminated before beginning of the quenching phase in press, and is started before or during the hot stamping phase. The hot stamping phase of the workpiece comprises a first step of relative movement between first and second drawing dies in a first direction formed on a movement path carrying a plastic deformation of the workpiece by hot stamping. The cutting phase of the workpiece comprises: a first step of relative movement between first and second cutting elements (12, 13) in a first direction and carried on a movement path in cutting a hole for the workpiece; and then a second step of relative movement between the first and second cutting elements in a second direction opposite to the first direction and carried on a movement path allowing the first cutting element to release the workpiece, where one of the first and second stages of relative movement of the both cutting elements is carried out during the first stage of relative movement of the press dies. The first stage of relative movement of the cutting elements is performed before beginning of the first stage of relative movement of the press dies during the first stage of relative movement of the dies. The second stage of relative movement of the cutting elements is performed before the end of the first stage of relative movement of the drawing dies. The step of press-quenching is carried out between first and second steps of relative displacement of the press dies. The step of clamping of the workpiece between first and second clamping members is carried out before starting plastic deformation of the workpiece by hot stamping and before the cutting step, and ends after the quenching stage and during or after the second stage of relative movement of the second drawing dies when the step of relative movement of the press dies is implemented. An independent claim is included for a device for manufacturing a piece of material susceptible to quenching.