Comparative analyses of multi-pass face-turning of a titanium alloy under various cryogenic cooling and micro-lubrication conditions

Comparative analyses of multi-pass face-turning of a titanium alloy under various cryogenic cooling and micro-lubrication conditions

Blog Article

Titanium alloys, despite their high strength-to-weight ratio, are considered as difficult-to-machine materials.Their poor machinability is attributed, among other reasons, to the accumulation of intense heat near the cutting edge that leads to brisk tool damage.The tool damage, T-Shirts in turn, causes deterioration of work surface quality, consumption of more energy and hike in machining forces.

The paper focuses on application of innovative lubro-cooling approaches and variation in cutting parameters with a fixed material removal rate for the sake of impeding tool damage and improving associated performance measures.Two cryogenic coolants (liquid nitrogen and carbon dioxide snow), minimum quantity of lubrication (micro-lubrication) and hybridization of the two were tested for effective dissipation of heat in face-turning of a commonly used titanium alloy.Additionally, the effects of removing a given volume of the alloy in one and two cutting passes (with a fixed material removal rate) on tool wear, work surface roughness, Hats cutting energy consumption and machining forces were also experimentally investigated.

The double-pass approach was found to have performed better regarding surface roughness, cutting energy and machining forces.Hybrid application of liquid nitrogen and micro-lubrication, carbon dioxide snow, and hybrid application of snow and micro-lubrication yielded the best results regarding tool wear, cutting energy consumption, and work surface roughness, respectively.The solitary application of micro-lubrication yielded significant reduction in the cutting force component.

Keywords: Specific cutting energy, Machining forces, Liquid nitrogen, Tool damage, Carbon dioxide snow.