process and device for small-sized control of the work stations of an automatic machine tool

摘要

The process makes possible the programming of each work unit of an automatic machine tool by the operator assigned to the machine on the basis of immediate working requirements which can be duly evaluated by him, responding, in his own language, to a series of requests that appear on a screen.;On the basis of the replies given to him, a second electronic memory is programmed by a keyboard which makes the work stations operate in the requested mode.;The device for driving the work unit comprises: a stepper motor (1) that drives a nut (2) controlling, by a tube (4), valves (7 and 8) for intake and discharge of a fluid in the hydraulic cylinder (10) for driving the work unit, said piston (11) is solid with a screw (9) screwing in said nut (2) and prevents it from rotating, thus achieving a mechanical re- troaction that makes the control independent of the variation of the viscosity of the fluid by the effect of the temperature.