The formula to calculate the Chip Per Tooth (CPT) is:
\[ CPT = \frac{FR}{SS \times NT} \]
Where:
Chip per tooth is a measure of the thickness of the material removed by each tooth of a cutting tool, such as a milling cutter, during one revolution. It is a critical parameter in machining that affects the surface finish, cutting forces, tool life, and the overall efficiency of the machining process. Proper selection of chip per tooth values can lead to improved productivity and better quality of the machined parts.
Let's say the feed rate (FR) is 100 inches/min, the spindle speed (SS) is 2000 RPM, and the number of teeth on the cutter (NT) is 4. Using the formula:
\[ CPT = \frac{100}{2000 \times 4} = 0.0125 \, \text{inches} \]
So, the chip per tooth (CPT) is 0.0125 inches.
Formula: \( CL = \frac{F}{N \cdot RPM} \)
Example: \( CL = \frac{100}{4 \cdot 3000} \)
Formula: \( IPT = \frac{F}{N \cdot RPM} \)
Example: \( IPT = \frac{120}{3 \cdot 2500} \)
Formula: \( FPT = \frac{F}{N \cdot RPM} \)
Example: \( FPT = \frac{150}{5 \cdot 2000} \)
