4. Knife is Harder
Knife is Sharper
It is used to cut, with ease
i.e Approach Angle
5. What Do We Use To Cut Steel or Cast
Iron or Stainless Steel?
Tungsten Carbide – Since it’s harder than
most of the materials.
Diamond is hardest than all other materials.
6. What is Common in this Process?
Turning
Milling
Drilling
Grinding
8. What is required for machining?
Depth of Cut - Preset interference between
tool and work piece
Feed - Motion to bring in additional
material for machining
Speed - What generates the basic
wedge and cuts
9. Machine Classifications
Turning Center or Lathe
Vertical Machining Centre (VMC)
Horizontal Machining Centre (HMC)
Special Purpose Machines (SPM)
10. Zones of Heat Generation
Shear Zone
Chip Tool Interface
Tool Work
Interface
Work
12. TOOL WEAR
Gradual Tool Wear
– Unavoidable but controllable
Premature Wear or failure
– Avoidable
13. How Do We Rate Machinability?
Tool life in minutes
Cutting forces and Power consumed
Quality of Surface Finish
Chip formation
Material removal rate