solved anna university problems on tool life

SOLVED ANNA UNIVERSITY PROBLEMS ON TOOL LIFE

AU Problem 1.8

The following cutting speed of cutting time observations has been noted in a machining process. Calculate

1) 'n' and C.

2) Recommend the cutting speed for a desired tool life of 60minutes.

Similar to Problem 1.29 on Page 1.83

AU Problem 1.9

A cutting tool when used for machining workpiece at a cutting speed of 50 m/min lasted for 100 minutes. Taking n = 0.26 in the Taylor's too-life equation, determine: (1) the life of the tool for an increase in cutting speed by 25% and (2) the cutting speed to obtain a tool life of 180 minutes. 

Similar to Problem 1.24 on Page 1.79.

[Ans:- Tool life for an increase in cutting speed by 25%, T2 = 42.39 min, Cutting speed to obtain a tool life of 180 minutes, V3 = 42.91 m/min]

AU Problem 1.10

Tool life test in turning yield the following data: (1) V = 110 m/min, T = 20 min; (2) V 85 m/min, T = 40 min. (a) Determine the n and C values in the Taylor tool life equation. Based on the equation, compute (b) the tool life for a speed of 95 m/min and (C) the speed corresponding to a tool life of 30 min.

Given data:

V1 = 110 m/min

T1 = 20 min

V2 = 85 m/min

T2 = 40 min

Solution:

(a) From Taylor's tool life equation,

AU Problem 1.11

Turning tests have resulted in 1-minute tool life at a cutting speed of 4.0 m/s and a 20- minute tool life at a speed of 2.0 m/s. (1) Find the n and C values in the Taylors tool life equation. (2) Project how long the tool would last at a speed of 1.0 m/s.

Similar to AU Problem 1.10 on Page 1.89.

1.35. CUTTING FLUIDS

[Ans:- n = 0.231, C = 10.3 & T = 404,04 min]