Press machine stroke operation mechanism and operation control method therefor

Abstract

The present invention provides a stroke operation mechanism which is incorporated in a single-structure press machine so that various types of stroke operations can easily be generated on the slide side, and a control method for controlling the stroke operation mechanism so as to cause the mechanism to exhibit various types of stroke operations. The press machine stroke operation mechanism has a driving system having a feed screw member disposed on a plane in parallel therewith, at least one pair of nut members screwed on the screw member and moved by rotation of the screw member so as to separate from and approach to each other, and a servomotor for supplying torques for normal and reverse rotations to the screw member; and a slide system having a slide member supported below the screw member at right angles therewith so as to be vertically slidable, and a transmission bar member having an upper end axially connected to the nut members and a lower end axially connected to the slide member. The rotational frequency and the rotational speed of the servomotor are controlled for controlling the position and speed of the slide member between the upper dead center and the lower dead center during the stroke motion of the slide member, which is caused by rotation of the motor.

Dependencies are inferred from the claim text.