Study of thermal stonecutting tools

The paper discusses the issues related to facing stone production of hard-rock granite rocks. It describes the rational methods for producing dimension stones and designs of thermal tools to destruct rocks in processing and production of dimension stones. The designs of thermal tools characterized by increased output performance has been developed as a work tool for power-operated unit of stone-cutting machines

The influence of operational factors on the contact-fatigue effect of couple of wheel-rail friction in curves of small radius

Lubrication on sharp curves has been commonly adopted as a method of reducing friction between the wheel flange and rail gauge face to minimize wear and energy consumption. Additionally, lubrication between the running surface of the low-rail and the wheel tread has recently been recognized as a significant factor in reducing the likelihood of low-rail corrugation, squealing noise and rail gauge face wear. This paper describes a friction-moderating system (FRIMOS) for the interface between the top of the low-rail and the wheel tread, consisting of a solid lubricant known as a friction moderator and a jetting device installed on the vehicle to apply the moderator to the wheel/rail interface