Method for Determination of the Expected Roughness of Cut Surfaces

Abstract

Nowadays the manufacturing companies create stricter and stricter demands on quality requirements of surfaces machined by cutting. The fulfilment of these requirements is often not an easy task, and in addition technologists should deal with the economic aspects too. Surface roughness indexes are important parameters in characterization of the quality of parts, especially in case of engaging and sliding one another machine elements influences remarkably their tribological properties and lifespan. Therefore it is indispensably important to completely satisfy the surface roughness requirements. It can mean a great help, if the prospective value of roughness indexes can be predicted in advance for the actual machining environment, since the selection of the optimal tool-geometrical and technological parameters become possible. Such a method will be introduced in the paper, by the help of which theoretical values of surface roughness can be determined for single point cutting by the help of an analytical model. A general mathematical model is introduced, by the help of which edge geometry of every realistically evolving tool can be described. Theoretical values of the relevant roughness indexes used in practice can be calculated by the application of this model. The connection with the real roughness data gained by experiments can be written down after this, hereby the surface roughness can be predicted, and thus the planning of technology can be faster and more efficient.