Dieless drawing wire with a given end geometry by realizing temperature distribution evolution

Abstract

Abstract Dieless drawing that has been widely used to produce metal tubes, wires, and rods has more potential for the future, especially in manufacturing high performance screws and nails with specific points. Because there are no dies but heating and cooling system along with drawing platform needed, it is highly flexible and meets the requirements of the steadily asked manufacturing on-demand. Under this trend, this study attempts to propose a heat transfer model that can achieve the required temperature evolution for dieless drawing a wire to form a specific end geometry as a nail point by obtaining the required evolution of heat transfer coefficient and the correspondingly approximated cooling fluid rate. After it is validated with tests on a dieless drawing platform implemented with a cooling system, whose cooling flow rate is controllable, the results show that for a linear end geometry of a stainless steel wire, there is no significant difference between the temperature distribution evolution required and obtained from the experiment. Furthermore, the end geometry of the drawn wire falls within the current industry standard tolerances as well.