Patent ID: 8096736

Claim:
A machining unit for use in machining the surface of cylindrical cavities, including: a fixed supporting structure; a bench for supporting a workpiece that is to undergo machining; a machining head, mounted and guided in such a way as to be displaceable at least in two directions orthogonal to one another with respect to the fixed supporting structure; a motor-driven spindle, rotatably mounted on the machining head; a tool-holder assembly, connected in a decoupleable way to one end of the motor-driven spindle; at least one tool, carried by the tool-holder assembly in such a way that the at least one tool is adjustable in a direction substantially radial with respect to the axis of rotation of the spindle; an electrically controlled actuator, mounted on the tool-holder assembly for governing the radial displacement of adjustment of the at least one tool, the actuator including an electro servo motor for controlling longitudinal axial displacement of a stem for selective radial movement of the at least one tool by means of a screw transmission, the stem having a lateral cam surface cooperative with a feeler pin associated to a rocker arm, which carries the at least one tool so that a longitudinal axial displacement of the stem determines the substantially radial displacement of the at least one tool; and an electronic control system for governing the electrically controlled actuator for controlling the radial displacement of the at least one tool, the electronic control system comprising: an electronic control unit located in a stationary position with respect to the fixed supporting structure of the machining unit; a wireless communication system including a wireless transmitter and a receiver device, one of the respective wireless transmitter and receiver device situated in a stationary position with respect to the fixed supporting structure and the other of the wireless transmitter and receiver device mounted on the tool-holder assembly.