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...

Single screw compressors (SSCs) have been used in many fields. Compared with other kinds of compressors, the SSC should have many advantages due to its symmetrical structure and well balanced radial gas pressure on the screw rotor. However, its durability is not as good as expected. After operating for several thousand hours, its flow rate often decreases sharply. The essential reason is that t...

This paper proposes an implementation of calibrated acoustic emission (AE) and vibration techniques to monitor progressive stages of flank wear on carbide tool tips. Three cutting conditions were used on workpiece material, type EN24T, in turning operation. The root-mean-square value of AE (AErms) and the coherence function between the acceleration signals at the tool tip in the tangential and ...

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...

|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...