Question

Differentiate between the positive and negative rake angles

Answer 1

Answer:

positive rake angles

1.positive rake offers a thin wedge.

2.higher cheap load cannot be applied as tool cannot with stand it.

3.positive rake is suitable for machening soft and ductile material such as copper and aluminium.

4.it also tend tend to reduce chip thickness and thus CRC remains low

negative rake angles

1.negative rake makes wedge thicker

2.higher cheap load can be applied safetly.

3.Negative rake is good for machening hard and brittle materials such as titanium.

4.it tends to increase chip thickness and thus CRC becomes high.

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