Question

Reduction in friction angle decreases cutting force why

Answer 1

The decrease in cutting forces with negative rake angle results from a large clearance angle, which helps in the reduction of friction and increases tool life. ... The experimental results revealed that the force due to chip formation is much higher than those due to ploughing and particle fracture.
Cutting tool: Cemented carbide
Cutting speed (m/min): 40,60,100,150,200
Cutting condition: Dry