This research work focuses on the experimental investigations conducted using uncoated cBN tool and (AlCrN) PVD Coated for turning Inconel 718. Two different sets of experiments – one with another coated inserts were considering three levels cutting speeds, feed rates depth cuts. The performance over evaluated it was found that AlCrN can produce 10-12% drop in force, 15% reduction flank wear 10...

Machining of titanium alloys is characterised by extremely rapid tool wear due to the high cutting temperature and the strong adhesion at the tool-chip and tool-workpiece interface, caused by the low thermal conductivity and high chemical reactivity of Ti alloys. With the aim to monitor the tool conditions during dry turning of Ti-6Al-4V alloy, a machine learning procedure based on the acquisit...

|III Abstract Powder metallurgy (PM) is usually used in manufacturing parts with complex geometries, such as gears and structural parts. The main attractions of PM are the high rate of material utilization, environmental friendliness of production, economic advantages (especially for complex geometries), and possibility of obtaining lighter components. To find a wide range of applications and c...

The challenges of machining, particularly milling, glass fibre-reinforced polymer (GFRP) composites are their abrasiveness (which lead to excessive tool wear) and susceptible to workpiece damage when improper machining parameters are used. It is imperative that the condition of cutting tool being monitored during the machining process of GFRP composites so as to re-compensating the effect of to...

Abstract The tool geometry is generally of great significance in metal cutting performance. response surface method was used to optimize chamfer achieve reliable and minimum wear slot milling. Models were developed for edge chipping, rake wear, flank wear. adequacy the models verified using analysis variance at a 95% confidence level. Each optimized individually, multiple responses simultaneous...

The gearboxes of aircraft gas turbine engines are their most stressed parts. One the main gearbox defects is tooth flank wear that causes resonant oscillations in engine structure elements. This defect generally assessed using vibroacoustic diagnostics methods. It noted currently existing recommendations on setting limit values for diagnostic indicators do not take into account type mathematica...

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...

Inconel 718 is a highly valued material in the aerospace and nuclear industries due to fact of its exceptional properties. However, processing this quite difficult, especially through machining processes. Machining results rapid tool wear, even when low removal rates are considered. In study, instrumented turning experiments were employed evaluate machinability alloy using PCBN tools while asse...

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...