MANUFACTURE OF STRANDED WIRE FOR WIRING

PURPOSE:To obtain a stranded wire with an improved conductivity, strength, and straightness, by annealing an aluminum, applying a wire drawing process, stranding plural wires into the stranded wire, continuously heating and cooling the stranded wire in a straight line condition, and then winding it. CONSTITUTION:After an aluminum or an aluminum alloy wire is annealed, a wire drawing process is applied at the room temperature in the processing rate 90% or more, and plural aluminum or aluminum alloy wires are stranded to obtain a stranded wire. Then, after continuously heating and cooing the stranded wire and then winding it, an objective stranded wire is obtained. In this case, since a distortion is generated by winding a high strength stranded wire, it is favorable to continuously heat and cool the stranded wire in an unwound straight line condition and then to wind it. As the aluminum or the aluminum alloy wire, an Al-Mg system alloy such as the JIS-5085 alloy is used favorably.