| 摘要 |
A group of drawing pulleys arranged in a spiral path and having between the successive pulleys individual dies for progressively reducing the cross section of a wire drawn by the pulleys through the dies. The axes of the pulleys are disposed spaced along the spiral path and in parallel relationship. The pulleys are rotatably driven with the speed of rotation such that the speed of each pulley is higher than the preceding pulley and proportional to the elongation of the wire being drawn because of reduction of its diameter. |
