Description
Chevron cracking or “crow’s feet” is arguably the most significant form of surface damage directly attributable to the wiredrawing process. This paper sets forth the basic mechanics of the causal stick-slip friction/lubrication phenomenon and examines the implications for practical monitoring and control. Classical tribological models are reviewed and assessed in regard to experimental and quality control observations on friction, lubrication and surface quality. Discussions of drawing practice issues and the impact on product performance are presented.
