Abstract
The AISI 4140 steel is one of the most widely used alloys in various applications due to its good formability, high-strength, weldability and excellent corrosion resistance properties. In this study, the effects of cutting parameters (feed rate, depth of cut and cutting speed) were investigated on surface roughness, vibration, sound intensity and machine current during turning of AISI 4140 using coated carbide cutting tools under dry test condition. The response surface methodology, analysis of variance and statistical methods of main effect plot were applied to investigate the effects of input parameters on the response variables. Mathematical models for surface roughness, vibration, sound intensity and machine current were developed using multiple linear regression methods. In addition, the confirmation test was carried out in order to validate reasonable degree of approximation between predicted and experimental results. The results of this study showed that feed rate has the most significant impact on output parameters followed by depth of cut. Therefore, according to the experimental data, vibration, sound intensity, surface roughness and current values increase as the amount of feed rate and the depth of cut increases.
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