CONTROL METHOD FOR MECHANICAL PRESS AND CONTROLLER FOR THE SAME

PROBLEM TO BE SOLVED: To provide a control method for a mechanical press capable of avoiding the occurrence of crack, deformation, etc., in deep drawing. SOLUTION: The controller of the mechanical press includes an angle detector for detecting the rotating angle of a crank shaft, a displacement detector for detecting the relative displacement of a second slide section with respect to a first slide section and a controller of a drive mechanism. The controller controls the drive mechanism in such a manner that the first slide section descends on the basis of the crank angle signal detected by the angle detector, and the second slide section descends from its ascending position to a descending position at a first relative speed upon passage of the first slide section through the first descending start position, that the second slide section ascends at a relative speed from the descending position to the ascending position right after the second slide section reaches the descending position and that the first slide section ascends right after the passage of the first slide section through a bottom dead point. COPYRIGHT: (C)2005,JPO&NCIPI