in this paper we present a new method for tool-path generation and adaptive interpolation for a three-axis cnc milling machine. this method satisfied the force and / or the error conditions by using a variable-direction variable-feedrate strategy based on maximum feedrate map. the proposed adaptive interpolator modifies the cutting path and the moving direction according to the actual instantan...

The built up layer thickness in secondary deformation zone is one of the important parameters in metal cutting process. The built up layer (BUL) is formed in second deformation zone near the tool-chip interface in the back of the chip. This parameter influences the tool life and machined surface quality. This BUL should not be confused with the built up edge (BUE). The deformation of the BUL in...

A high strength nickel chromium alloy (50Cr-50Ni-Nb alloy), commonly referred to as IN-657, is specifically used for components in furnaces which are fired by low grade fuel oils containing high levels of vanadium, sodium and sulphur. The purpose of this study is to experimentally investigatethe effect of machining parameters on machinability in turning of Inconel 657. The considered parameters...

Abstract Nickel-based alloys have excellent mechanical properties and are widely used in the aviation aerospace industries. However, high-speed cutting of nickel-based has characteristics high force, temperature, low tool life. Tools with performance important for high-quality machining inner-base colleges universities. Many scholars begun to discuss use gradient functional materials nanocompos...

The reasons for the availability of a large variety of cutting-tool materials is best appreciated by reviewing the top eight parameters in the first column in Table 22.2 on p. 638. Among various factors, the type of workpiece material machined, the type of operation, and the surface finish and dimensional accuracy required all affect the choice of a cutting-tool material. For example, for inter...

This work is about a fuzzy logic model in order to suggest an initial cutting tool geometry for each work-tool material combination. The Takagi-Sugeno-Kang model was used to design the fuzzy system that was trained with suggested empirical cutting tool geometry values. The system inputs are the specific cutting energy of the work material and the ratio of the quadratic bending strength over mod...

The paper describes micro structural observation (LM and SEM), which has been made on quick-stop sectioned samples of the chip formation, either on metals (high-speed steels) and Ti3SiC2 ceramic. All milling tests were carried out using a “quick-stop” method developed by the authors. For micro structural analysis samples were prepared by standard metallographic technique and examined with a lig...