written 5.0 years ago by |
The ease with which machining of given material can be done called machinability.
Parameters which affects the machinability of material.
1) Physical and mechanical properties of material
2) Chemical composition
3) Cutting conditions
- Machinability can be evaluated by knowing following parameters.
1. Specific cutting energy :
Lower the specific cutting energy required for machining implies better machining of work piece.
Specific cutting energy $\downarrow$ Machinability $\uparrow$
2. Tool Life :
Longer tool life at given cutting speed indicates good machinability.
Tool Life $\uparrow$ Machinability $\uparrow$
3. Surface Finish :
Better is surface finish, higher is Machinability
surface finish $\uparrow$ Machinability $\uparrow$
4. Forces and power consumption :
Lower the forces and power consumption better will be machining.
Forces and power consumption $\downarrow$ Machining $\uparrow$
5. Shear angle :
Lower the shear angle better the machinability.
Shear angle $\downarrow$ Machinability $\uparrow$
6. Cutting Force :
Lesser the cutting force for removing the higher volume of metal, higher will be machining ability.
cutting force $\downarrow$ Machinability $\uparrow$
7. Material removal rate :
Under the similar conditions of machining, Higher the MRR, Better the machining of workpiece.
MRR $\uparrow$ Machinability $\uparrow$