Question

A straight turning operation is carried out at the feed rate of 100 mm/min using a single point cutting tool with signature 8 – 8 – 5 – 5 – 7 – 25 – 0 (ASA). The spindle speed is 1600 rpm. The roughness, in μm, of the machined surface in terms of peak-to-valley height is ................. (round off to 2 decimal places).

Hint:

The roughness value can be calculated using the feed rate and spindle speed in turning operations, along with the tool signature.

Answer 1

- The roughness \(R_a\) is given by the formula: \[ R_a = \frac{C}{f \cdot N} \] where \(C\) is a constant, \(f\) is the feed rate, and \(N\) is the spindle speed. Using the given parameters and the tool signature, we calculate the roughness as: \[ R_a = 7.1 \, \mu m \]