| 摘要 |
A tape, which includes a number of parallel-extending, elongated wires of substantially circular cross-section, is formed by subjecting an elongated workpiece to two stages of deformation. In a first stage, the workpiece acquires an intermediate structure, in the form of a tape composed of a number of parallel-extending elongated elements, each having a cross-section which preferably includes a pair of diametrically opposed, substantially circular, arcuate portions. The cross-section of each elongated element also includes a non-circular, junction region converging toward the adjacent lateral edge of each adjacent elongated element. Each pair of adjacent elongated elements in the intermediate structure is joined together along the adjacent lateral edges, by two such junction regions, one included in each of the elongated elements of the pair. The contacting junction regions preferably meet one another along flat surfaces at approximately ninety degree angles. In the second stage of deformation, the intermediate structure is subjected to transverse, and preferably substantially lateral, compression forces which serve to deform each junction region into a generally circular, arcuate, cross-sectional shape. The two stages of deformation may take place one immediately following the other by the extrusion of the elongated workpiece through a suitably configured die having two longitudinally aligned deformation zones. |
