Pass schedule design system in the dry wire-drawing process of high carbon steel

Abstract

Recently, high-speed drawing has become very common because of the increase in customer demands and production rate in real industrial fields. In the high-carbon steel wire-drawing process, the wire temperature rises greatly according to the increase in the final drawing speed. The rapid temperature rise makes the wire more embrittled and finally leads to wire breakage. Therefore, in this paper, an approximate wire temperature estimation method is proposed to control the maximum temperature rise in the wire-drawing process. Using these results, it is possible to develop the isothermal pass schedule programme, to design the wire-drawing process. Also, the conventional pass schedule can be redesigned by considering the pass schedule constraints. As a result, the wire temperature was considerably reduced and the productivity of the final product could be improved by about 11 per cent.