HW-09-17-08s-Ch23

HW-09-17-08s-Ch23 - IE 215 Solutions for Problems due Sep...

This preview shows pages 1–3. Sign up to view the full content.

IE 215 Solutions for Problems due Sep 17, 2008 (Ch 23) 23.3 A series of turning tests were conducted using a cemented carbide tool, and flank wear data were collected. The feed was 0.010 in/rev and the depth was 0.125 in. At a speed of 350 ft/min, flank wear = 0.005 in at 1 min, 0.008 in at 5 min, 0.012 in at 11 min, 0.0.015 in at 15 min, 0.021 in at 20 min, and 0.040 in at 25 min. At a speed of 450 ft/min, flank wear = 0.007 in at 1 min, 0.017 in at 5 min, 0.027 in at 9 min, 0.033 in at 11 min, and 0.040 in at 13 min. The last value in each case is when final tool failure occurred. (a) On a single piece of linear graph paper, plot flank wear as a function of time. Using 0.020 in of flank wear as the criterion of tool failure, determine the tool lives for the two cutting speeds. (b) On a piece of natural log-log paper, plot your results determined in the previous part. From the plot, determine the values of n and C in the Taylor Tool Life Equation. (c) As a comparison, calculate the values of n and C in the Taylor equation solving simultaneous equations. Are the resulting n and C values the same? Solution: (a) Flank Wear vs Time 0.000 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045 0 5 10 15 20 25 30 Time (min) Flank Wear (in) Flank v = 350 ft/min Flank v = 450 ft/min Using the graph, at 350 ft/min the tool last about 6.2 min ; at 450 ft/min, it lasts 19.0 min . (b) The points are graphed in Excel and the line connecting the two points is extended to the axis.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Taylor Tool Life 10 100 1000 1 10 100 Tool Life (min) Cutting Speed (ft/min) C is read from the Y-intercept and is approximately 680 ft/min. The slope, n , can be determined by taking the ln of the
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/24/2008 for the course IE 215 taught by Professor Groover during the Fall '08 term at Lehigh University .

Page1 / 4

HW-09-17-08s-Ch23 - IE 215 Solutions for Problems due Sep...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online