FACTORS EFFECTING NON TRADITIONAL MACHINING
THERE ARE VARIOUS FACTORS WHICH EFFECT NON-TRADITIONAL MACHINING.THESE ARE:-
TYPE OF MATERIAL TO BE MACHINED
- Effect of abrasive grain size
- Effect of lubricant
- Effect of temperature
- Tool feed rate
- Effectiveness of machining
- Gap between tool and work piece
- Cost effectiveness
- Effect of lubricant:-
The lubricant used in machining helps ease the machining. The lubricant helps to overcome the high temperature near the machining region by absorbing most of the heat. It also helps to complete the circuit as in case of electro-chemical machining. It acts as electrolyte in this case.
The electrolyte should not have very high fluidity as because it will not stay near machining region. And it should not be very viscous, high viscosity fluid will be unable to carry heat from working region. Hence it should have optimum viscosity.
Various lubricant like Greece, Coconut oil, Mobil etc are used.- Effect of temperature:-
The temperature is important factor which effects machinability. When the temperature is very high the machinability decreases as tool may wear out due to high temperature or work piece may get effected resulting in bad machinability.
As the cutting speed increases the temperature increases (as shown in graph), when the speed increases to enormous limit, temperature of machining area also increases to high level, this is to be controlled.
Effect of speed on machining
As the speed increases the machining rate (material removal rate) increases, but up to certain limit only. Beyond a particular limit machinability decreases. High speed results in high temperature generation and also wear of tool may occur.
Effect of grain size
As the speed increases the machining rate (material removal rate) increases, but up to certain limit only. Beyond a particular limit machinability decreases. High speed results in high temperature generation and also wear of tool may occur.
Effectiveness of machine:-
The tool and machine should be such that there should be minimum vibration (in case of ultrasonic machining). The voltage and current should be optimum according to operation requirement. The clamping of work piece to the fixture should be firm enough so that it should not move or deviate while machining.
Gap between tool and work piece:-
The affect of gap between the tool and work piece plays important role in non traditional machining. In case of abrasive jet machining, larger is the gap greater will be the speed of grains due to gravity. similarly in laser beam machining, laser beam penetration will be more if the gap will be less.
Cost effectiveness:-
Production in mass should be such that it is cost effective. There is no use of such production. The process non traditional machining should be chosen that is most cost efficient which further depends on the type of material to be machined and environmental condition. Machining parameter should optimum will affects the cost directly.
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