Today, machining processes are among the most common and important industrial operations. Considering the wide applications of the machining processes, the importance of having an accurate and reliable monitoring system is clear. Therefore, several researches and studies have been performed to respond to this demand. Despite considerable efforts in this field, the achievement is not satisfactor...

This paper focuses on the effect of the drill geometry on the drilling of woven Carbon Fiber Reinforced Polymer composite (CFRPs). Although different geometrical effects can be considered in drilling CFRPs, the present work focuses on the influence of point angle and wear because they are the important factors influencing hole quality and machining forces. Surface quality was evaluated in terms...

In this paper, the tool wear mechanisms for low-frequency vibration-assisted drilling (LF-VAD) of carbon fiber-reinforced polymer (CFRP)/Ti6Al4V stacks are investigated at various machining parameters. Based on kinematics analysis, effect vibration amplitude chip formation, uncut thickness, radian, and axial velocity examined. Subsequently, LF-VAD cutting temperature, wear, delamination, geomet...

End cutting edges of tool determine machining quality the bottom surface slot in end-milling CFRP. However, due to anisotropy and heterogeneous CFRP, also semi-closed characteristic blind slots, end are more vulnerable wear than peripheral under strong abrasive fibers, leading poor thereby decreases assembly performance components. This paper aims reveal laws mechanisms edge which serves condit...

Abstract One of the main limits productivity during cutting processes is occurrence regenerative chatter. Due to these self-excited vibrations, load capacity machine components, tool as well performance cannot be fully utilized. There are several methods stabilize milling process. use increased process damping, which results from contact tool’s flank face and workpiece. The wear land naturally ...

Titanium alloys are the difficult to cut metals due their low thermal conductivity and chemical affinity with tool material. Since vibration is a replica of wear surface roughness, present study has proposed methodology for estimating roughness based on milling Ti-6Al-4V alloy using cemented carbide mill cutter. Experiments conducted at optimum levels cutting speed, feed per tooth, depth cut, e...

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Longitudinal ultrasonic vibration-assisted high-speed dry milling (LUVAHSDM) is adopted to improve the cutting performance and surface quality of Ti-6Al-4V (TC4). Multifaceted comparisons are presented in terms force, temperature, tool wear, 3D roughness, residual stress, utilizing AlCrN, AlCrSiN, AlTiN, AlTiSiN-coated tools. The results show that maximum forces feed longitudinal directions bot...

In order to improve the tool life and micro-hole machining quality, H-shaped chisel edge micro-drill (HCE-MD) was developed in this paper. The HCE-MD characterized by inner formed through thinning. micro-drilling process, can perform positive rake cutting, so area of workpiece extruded cutting with a negative angle is reduced. Based on this, distribution near corner improved. Then, fabricated s...

This research work highlights the effects of acoustic emission (AE) signals emitted during the milling of H13 tool steel as an important parameter in the identification of tool wear. These generated AE signals provide information on the chip formation, wear, fracture and general deformation. Furthermore, it is aimed at implementing an online monitoring system for machine tools, using a sensor f...