DEVICE AND METHOD FOR CONTROLLING OUTER DIAMETER OF WIRE

摘要

PROBLEM TO BE SOLVED: To provide a wire outer diameter control device and method for controlling the outer diameter of a wire so that dielectric strength of an insulating coat can satisfy a specified value and the outer diameter can satisfy a specified value to economically manufacture the wire with the outer diameter in a range of specified value even when the outer diameter control device for the wire is started and the operating conditions of the outer diameter control device for the wire are changed. SOLUTION: A computation part 176 of an outer diameter control unit 17A performs sampling of an outer diameter measured by an outer diameter measuring device 15 to calculate an average value Xbar for the outer diameter (d) from its result, a standard deviationσfor the outer diameter and an outer diameter lower limit predicted value Du in accordance with the average value for the outer diameter and the standard deviation for the outer diameter (d). A set value correction part 177 calculates a new target value Ss from the outer diameter lower limit specified value and the width of a dead zone. A control computation part 175A determines the take-up speed of a take-up device in accordance with a difference between the new target value and an actual outer diameter to drive and control the take-up device in accordance with its result.