Abstract
Machinability of engineering materials is crucial for industrial manufacturing processes since it affects all the essential aspects involved, e.g. workload, resources, surface integrity and part quality. Two basic machinability parameters are the surface roughness, closely associated with the functional and tribological performance of components, and the cutting forces acting on the tool. Knowledge of the cutting forces is needed for estimation of power requirements and for the design of machine tool elements, tool-holders and fixtures, adequately rigid and free from vibration. This work investigates the influence of cutting conditions on machinability indicators such as the main cutting force Fc and surface roughness parameters Ra and Rt when longitudinally turning CuZn39Pb3 brass alloy. Full quadratic regression models were developed to correlate the machining conditions with the imparted machinability characteristics. Further on, an advanced artificial grey wolf optimization algorithm was implemented to optimize the aforementioned responses with great success in finding the final optimal values of the turning parameters.
Highlights
Due to their physical and mechanical properties copper and zinc alloys possess excellent machinability; high electric as well as thermal conductivity, significant resistance to corrosion and noticeable antibacterial properties
The present study investigates the influence of cutting parameters on machinability indicators such as the main cutting force Fc and surface roughness parameters roughness average (Ra) and Rt when longitudinally turning CuZn39Pb3 brass alloy
I n the case of steels it was identified [9,22], that surface roughness decreases with increasing cutting speed and decreasing depth of cut and feed rate; such a behavior was not observed for the CuZn39Pb3 brass alloy
Summary
Due to their physical and mechanical properties copper and zinc alloys (brass) possess excellent machinability; high electric as well as thermal conductivity, significant resistance to corrosion and noticeable antibacterial properties. The present study investigates the influence of cutting parameters on machinability indicators such as the main cutting force Fc and surface roughness parameters Ra and Rt when longitudinally turning CuZn39Pb3 brass alloy. It should be noted that nowadays, due to the increasing trend towards unmanned manufacturing systems, machinability assessment procedures are crucial part in process planning for machining These procedures are based on a number of either individual or combined machinability criteria such as the tool-life and wear, material removal rate, cutting monitoring of cutting forces and/or power consumption, surface finish and machining accuracy [17]. The scope of the experiment is the investigation of the effect of cutting conditions on surface roughness parameters; Ra and Rt, as well as main cutting force component; Fc, when turning CuZn39Pb3 (CW614N) alloy. 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 mm Figure 2: Typical filtered surface roughness profile of a turned brass alloy
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