BASICS OF MACHINING METHODS TO YIELD WEAR-RESISTIVE AND FRETTING-RESISTIVE SURFACES, HAVING REGULAR ROUGHNESS PATTERNS

The paper discusses the advantages of parts' surfaces characterized by a regular roughness pattern obtained by using a method of vibrorollin g. These surfaces are superior to those machined with conventional tec hniques, especially with regard to improvement in related parts' perfo rmance. The results of the investigation disclosed a change in the per formance specifications of parts as a function of micro-groove profile variations, both with and without lubrication. Diagrams are included showing surface roughness parameters vs. machining conditions. They ca n be used to optimize machining parameters in order to achieve a prese lected roughness pattern, thus providing the needed parts' performance specification. Vibrorolling is a simple and cost-efficient machining method recommendable as a substitute for a variety of conventional, en vironmentally harmful techniques. (C) 1997 Elsevier Science S.A.