### Interpretation of Wear Model Equation

Tool life is shown as a function of cutting speed on the left plot. The tool life equation *V* *T*^{n} = *C* is shown on a log-log plot on the right. The plots can be used to assess the effects of *n* and *C* on tool life.

To show the tool life model graphically:

Click "Reset" to initialize,

Set values for *n* and C,

Click "Start/Stop."

Different cases can be compared by changing *n* and/or *C* and "Start/Stop"

"Reset" will give a new display

*Task:* Determine the effects of the tool life model constants on predicted tool life for a specific cutting speed.

To do this,

a) plot tool life as a function of *C* for various values of *n*.

For example, let *V* = 100 m/min, set *n* = .25, determine *T* for *C* = 250, 300, 350, 400, 450, 500. Repeat for *n* = .32 and *n* = .39.

b) similarly, plot tool life as a function of *n* for various values of *C*.

© 2001 by Barney E. Klamecki. All rights reserved