Positive feeder device for feeding metal wires at constant tension

摘要

A metal wire feeder device including a body presenting a wire braking member, one or more pulleys driven by respective motors about which the wire is wound, the wire before reaching a processing machine passing through a compensator member and a tension sensor, an electronic control unit able to continuously measure the tension value and make it uniform at a predetermined value by acting on a first regulator loop operating on the motors and a second regulator loop operating on the compensator member. The electronic control unit operates automatically in making the tension uniform at the predetermined value, on the basis of the fed wire quantity or of the wire feed velocity.

主权项

1. A feeder device for receiving metal wires unwinding from a corresponding spool and feeding the received metal wires to a processing machine at a desired tension, the feeder device comprising:
a body having a wire braking member, a tension sensor associated with the body for measuring tension of the wire being fed by the feeder device to the processing machine, an actuator associated with the body, at least one rotary member driven by the actuator, and about which the metal wire winds for a fraction of a turn or for several turns, to feed the wire to the processing machine at a tension which is a function of drive torque generated by the actuator rotating the rotary member, the tension being regulated to be maintained within a region of a predetermined and/or programmable reference value and be increased or decreased if needed to return the tension to the region, a control unit for controlling the movement of the actuator connected to the tension sensor, the control unit arranged to regulate torque generated by the actuator on the rotary member on a basis of tension measured by the sensor, the tension being able to be greater or less than that under which the wire unwinds from the corresponding spool; the control unit having or cooperating with a memory containing tension data related to a wire feed value measured independently by the feeder device, the control unit cooperating with the memory; and and wherein the control unit determines said feed value by using at least one parameter selected from the group consisting of the wire feed quantity fed by the device and the wire feed velocity, the wire tension being modified on the basis of an operative stage of the processing machine by acting on the rotary member and the actuator.