Influence of back-tension on effect of skin pass in minimising residual stress levels after cold rod drawing

Experimental and numerical investigations have been carried out on the infl uence of back-tension on residual stress levels after cold bar drawing. In particular, the influence on the skin pass effect was studied. Experimental and numerical results show that back-tension has little influence on the r eduction of residual stress obtained following skin pass drawing. It is con cluded that a skin pass can be incorporated into the final stage of drawing regardless of the draft schedule of the overall drawing process. (C) 2001 loM Communications Ltd.