Evaluation of drawing dies wear

摘要

The experiments with pressure drawing dies were carried out on the industrial straight line continuous drawing machine. The steel wires of 2.1 mm in diameter and carbon content of 0.85÷0.87 % were drawn from the wire rod of 5.5 mm in diameter, initially subjected to surface treatment with borax. The hydrodynamic lubrication was used to increase production effectiveness, improve wire quality and decrease a number of defective products. As a result of the experiment, the wire were achieved with the diameter and the ovality within the required tolerance and the improved surface quality. Moreover, drawing dies wear was observed. The moment of the dies wear was expressed by a dependence of the drawn wire surface roughness on the drawing process duration. It was found out that when hydrodynamic lubrication was used, dies consumption decreased 4.5 times in comparison to consumption of standard dies.