502,317 active members
5,902 visitors online

1. ## Calculating tool life

I am trying to calculate the tool life for a part designed in SolidWorks and milled in SolidCAM.

What are the parameters and formulas that I must have to do this?

I have

- The part material (Mild Steel (CQ))
- Feed Per Tooth (what are the units for this one?)
- Surface cutting speed (m/min?)

Any help or "pointing in the right direction" appreciated.

Cheers

2. Can I use Taylors Basic Equation?

(V)*(T^n) = C

where T = tool life
V = cutting speed
C and n are available from reference sources

does anyone have any experience with this formula?

3. ## Re: Calculating tool life

The "Manufacturing Planning and Estamating Handbook on page 6-56 has a table 6-20.
T is in minutes and C is the calculated constant.
V is in SFM.
The table gives the n value to use.
Work Material, Sinistered Carbide, High-speed steel.
Steel, soft .20 (this value using 300 FPM), .12
Steel, hardened .25 , .15
Cast iron .25 , .15
Light metals .41 , .41

The table gives those values for a 60 minute tool life, .009 ipr and .062 depth of cut for HSS.
Carbide using .010 ipr and .100 depth of cut.

For guesstimation I have just used .25 for Carbide cutters and .1 for HSS, and what ever FPM and IPR and the apparent tool life I was getting in minutes and change T to what I want to change for a guess at a new FPM