engineering recuitment GATE ME 2023-24 Test Series Production Engineering (Manufacturing) Machining Processes and Machine Tools Economics of Machining
For machining mild steel, with a speed of 50 m/min, a tool life of 50 minutes is obtained, and when the cutting speed was 80 m/min, the tool life was 15 minutes. The time required to change a tool is 10 minutes. The machining cost is Rs. 5/min and tool cost is Rs. 80
1
The tool life exponent = 0.29
2
For maximum productivity criteria, Toptimum = 17.5 minutes
3
For maximum profit criteria, Toptimum = 40.6 minutes
4
The tool life exponent = 0.39