Merchant's First Solution for Minimum Energy

Q. In an orthogonal cutting test with a tool of rake angle 15 deg, the following observations were made: chip thickness ratio = 0.37, horizontal cutting force = 1000 N, vertical cutting force = 1500 N.

The machining constant for the given machining operation is

1. ${76.82}^{\circ }$
2. ${65}^{\circ }$
3. ${55.8}^{\circ }$
4. ${49}^{\circ }$

Q. Common Data:
An orthogonal operation is carried out at $20m/min$ cutting speed, using a cutting tool of rake angle $15$ degree. The chip thickness is $0.4mm$ and uncut chip thickness is $0.2mm$

The shear angle (in degrees) is

1. $26.8$
2. $27.8$
3. $28.8$
4. $29.8$

Q.

Common Data:
An orthogonal operation is carried out at $20m/min$ cutting speed, using a cutting tool of rake angle $15$ degree. The chip thickness is $0.4mm$ and uncut chip thickness is $0.2mm$

The chip velocity (in $m/min$) is

1. $8$
2. $10$
3. $12$
4. $14$

Q. In a typical metal cutting operation, using a cutting tool with a positive rake $\alpha ={10}^o$, it is observed that the shear angle was ${20}^o$. The friction angle is

1. ${45}^o$
2. ${30}^o$
3. ${60}^o$
4. ${40}^o$