| Abstract: | A Waterbury-Farrel cold heading machine was instrumented so that the total force and frictional force could be recorded during the first blow operation of AISI 1018 steel wire and the efficiency of various lubricants, including zinc phosphate, was evaluated. Zinc phosphate and other bonded lubricants did not offer any distinct advantage in reducing the coefficient of friction between the wire and the central bore of the first blow punch whereas a low cost liquid lubricant, SAE 30 oil, used either alone on bare wire or with bonded lubricants proved to be the most effective. It is suggested that a low cost liquid lubricant, such as SAE 30 oil, used on bare wire has both economic and operational advantages under conditions where no extrusion is carried out during the first blow. |
