Patent ID: 8341996

Claim:
A method for deep drawing a metal sheet including a press, a table, a drawing punch, a drawing die and a counterpressure plate interacting with the drawing die to form a flow path for the metal sheet, the method comprising a first deflection phase wherein at least one drawing strip movable relative to the counterpressure plate is pushed transversely through the flow path of the metal sheet in order to deflect the metal sheet during a drawing phase; a second deflection phase wherein the drawing strip extends further transversely through the flow path and increases the degree of deflection of the metal sheet to inhibit the flow of the metal sheet during the second deflection stage, and wherein the metal sheet is essentially plastically formed at the end of the deep-drawing operation, wherein the degree of deflection required during the first deflection phase is set by means of an interchangeable distance piece which is arranged between the counterpressure plate and the drawing strip and serves as a limit stop; and providing a pressure pin between the table and the drawing strip, and wherein the pressure pin is shorter than the distance between the table and the drawing strip during the drawing phase, the distance being reduced during the drawing phase, and the pressure pin being clamped in place between the table and the drawing strip at the end of the drawing phase whereby the pressure pin exerts a force on the drawing strip and the drawing strip is lifted from the distance piece serving as a limit stop for the drawing strip, such that the drawing strip is in the second deflection phase.