MICROCUTTING WORKPIECE MATERIAL Machinery's Handbook, 31st Edition
1171
10 2
2 3 4 5
Q = 1.25 n = 0.94 C = 40.79
10 1
2 3 4 5
Constant cir. speed High–low cir. speed Low–high cir. speed
10 0
3 4
5 6 10 0
2 3 4 5 6 Turning Time (min)
2
3
10 1
Fig. 11a. Tool life plot for turning tools. Circumference speed refers to the maximum cutting speed at the outer radius in turning. Cast A359/SiC⁄20p; tool H1 WC (-8,0,9,5,60,30,0.4mm); 0.5 mm depth; 0.07 mm/rev feed; dry.
Tool wear criterion
300
250
45 to 34 m/min 45 to 25 45 to 19 45 to 14 45 to 10 33 to 25 32 to 24 18 to 12
200
150
0 1 2 3 4 5 6 7 Accumulative Facing Time (min)
Fig. 11b. Cumulative flank wear of tool facing at high-to-low circumference speed. Cast A359/SiC⁄20p; tool H1 WC (-8,0,9,5,60,30,0.4mm); 0.5 mm depth; 0.07 mm/rev feed; dry.
10 2
2 3 4 5 6
Q = 1.5 n = 0.8957
10 1
Constant cir. speed High–low cir. speed Low–high cir. speed
4 3 2 6 5
2 3 4 5 6 7
2 3 4
10 0
10 1
Facing Time (min)
Fig. 11c. Tool life plot for facing tools. Circumference speed refers to the maximum cutting speed at the outer radius in facing. Cast A359/SiC⁄20p; tool H1 WC (-8,0,9,5,60,30,0.4mm); 0.5 mm depth; 0.07 mm/rev feed; dry.
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