Behavior of austenitic stainless steels at high speed turning using specific force coefficients

• Published in: International journal of advanced manufacturing technology Vol. 62; no. 5-8; pp. 505 - 515
• Main Authors: Fernández-Abia, Ana Isabel, Barreiro, Joaquín, López de Lacalle, Luis Norberto, Martínez-Pellitero, Susana
• Format: Journal Article
• Language: English
• Published: London Springer-Verlag 01.09.2012; Springer Nature B.V
• Subjects: Austenitic stainless steels; CAE) and Design; Coefficients; Computer-Aided Engineering (CAD; Cutting force; Cutting speed; Engineering; Experimentation; Industrial and Production Engineering; Mathematical models; Mechanical Engineering; Media Management; Original Article; Shearing; Stainless steel; Turning (machining); Mechanistic model; Characterization; Austenitic stainless steel; High speed turning; Cutting forces
• ISSN: 0268-3768; 1433-3015
• DOI: 10.1007/s00170-011-3846-9

Turning operation has been widely studied, and it is a well-known process. However, still today some limitations exist in the processing of some materials, mainly due to the poor or inexistent characterization. Such is the case of austenitic stainless steels, which in spite of being materials of high economic and technological value, their behavior to machining is still not well understood in some aspects. There are not reliable and updated technological data about austenitic stainless steels at industry. This fact is especially significant when considering technological development conducted by a continuous increment of cutting speeds. Nowadays, there is not a reliable mechanistic model for austenitic stainless steels turning adjusted for high cutting speeds. In this paper, a mechanistic model for cutting force prediction is presented. This model was developed for machining with nose radius tools considering the effect of the edge force due to the rounded cutting edge. In addition, a set of machining tests were carried out to obtain the specific force coefficients expressions for austenitic stainless steels using the mechanistic approach at high cutting speeds. The specific cutting coefficients were obtained applying the force model as an inverse model. This paper presents expressions for shearing and edge cutting coefficients which are valid for a wide range of cutting conditions. Results were validated by comparing the values estimated by the model with the ones obtained by experimentation.