Каталог Widia all star 2020 - страница 177

Trochoidal Milling

TTConventional Slotting

• Full slotting limitations: — Usually not more then ap = 1 x D. — Conventional and climb milling at the same time. — High heat development on the tool and on the workpiece. — Difficult chip evacuation. — High radial forces.
• This means: — No constant chip thickness. — Low MRR. — Surface quality from the left to right side are different. — Limited tool life. — High power and torque requirements for the machine.

fz = feed per tooth [mm/z] n

Feed direction

hm = average chip thickness [mm]

TTae and Chip Thickness

fz

n d1

ae

hm To calculate average chip thickness: hm = fz ( )ae d1 Simplified formula for shown application and 90° angles on the tool. The chip thickness defines the load on the cutting edge.