Match the List-I with List-II following:
1. Tool-change cost
2. Machining cost
3. Non-productive cost
4. Tool cost
Consider the following actions:
1. Mechanical abrasion
3. Plastic deformation
Which of the above are the causes of tool wear?
What is the variation of cutting speed with tool life on log-log scale?
Match the List-1 with List-lI:
1. Cast alloy
4. Ideal material tools
In idealized chip formation, built up edge will break off and remove some of the cutting tool materials, thereby reducing tool life. Which of the following steps prevent built up edge?
1. Increasing cutting speed
2. Increasing feed rate
3. Increasing ambient work-piece temperature
4. Decreasing rake angle
5. Reducing friction
Select the correct answer using the code given below:
Why does crater wear start at some distance from the tool tip?
Diffusion play an important role in the development of crater wear at a high speed because temperature in the rake face is much higher than that in the flank surface.
Surface obtained for circular generatix and straight line directrix would be
Which of the following indicate better machinability?
1. Smaller shear angle
2. Higher cutting forces
3. Longer tool life
4. Better surface finish
Factors which come into play while evaluating the machinability of any metal are:
1. Tool life
2. Form and size of chip and shear angle
3. Cutting forces and power consumption
4. Surface finish
5. Cutting temperature
6. Rate of metal removal per tool grind
7. Rate of cutting under the standard force
8. Uniformity in dimensional accuracy of successive parts
Dynamometer is a device used for the measurement of
The primary tool force used in calculating the total power consumption in machining is the