Abstract: In a control circuit for a transfer device including feed bars movable along two or three axes and servo-actuators respectively provided for driving the feed bars in stroke-forming movements along the axes, there are provided a stroke signal generator for generating a stroke defining signal separately from press movement and press control device for controlling the operation of a press. Based on the output signal from the stroke signal generator, the press control delivers press starting and stopping instructions at appropriate instants not interfere with the movements of the feed bars for initiating press operations of an intermittent nature.

Abstract: Apparatus particularly well suited for successively transferring generally flat workpieces through a series or processing stations in a transfer press. Included are a pair of transfer bars extending horizontally in parallel spaced relation to each other. Disposed adjacent one end of the transfer bar pair, a feed mechanism longitudinally reciprocates the transfer bars. A pair of clamp mechanisms and a pair of lift mechanisms, disposed adjacent the opposite ends of the transfer bar pair, move the transfer bars toward and away from each other, and up and down, respectively. The transfer bars repeats the longitudinal, transverse, and vertical motions in a prescribed sequence for work transfer through the successive press stations. The feed, clamp, and lift mechanisms are all driven by respective DC servomotors so that the longitudinal, transverse, and vertical strokes of the transfer bars ar infinitely variable.

Abstract: A transfer press is disclosed including a bed, at least two slides, uprights and a crown. Driving means for the slides are accommodated within a plurality of driving chambers. Connecting rods are inserted within said uprights for tightly connecting said driving chambers with said bed. Each slide is actuated by a pair of connecting rods positioned diagonally adjacent to both ends thereof between forward and rearward members of the uprights for achieving uniform distribution of urging forces.