Page 27 - ISCARs-solutions-for-Heavy-Machining-2022

Face Milling
Next to Square Shoulder
• It is recommended that the width of cut be
no more than diameter DC in order to prevent
tooth overloading, due to excess machining
allowance in cusps produced after stepdown
• Down (climb) milling is preferable

Entry into Material

• In milling, an approach cut by arc (“rolling in”)
is preferable. When a milling cutter enters a machined
material by use of an arc, chip thickness grows to
a maximum value progressively and then gradually
diminishes to zero. It significantly contributes to machining
stability, improves tool life, and reduces vibrations

Milling Hole of Diameter D by Helical Interpolation
• Maximum and minimum hole diameters
Dmax and Dmin correspondingly:
• Dmax = 2 x DCX – 1, Dmin = DCX + DC
• Down (climb) milling is recommended, however APMX
if chip evacuation is problematic, up (conventional)
milling provides better results
• Helical pitch should not exceed maximum depth of cut APMX DC
• Helix angle should not exceed maximum ramping angle RMPX DCX
• It is recommended to reduce feed per tooth fz by 30-40%

Ramp Down Milling
• Depth of ramping per pass should
not exceed maximum depth of cut APMX
• Ramping angle should not exceed
maximum ramping angle RMPX APMX
• Down (climb) milling is preferable RMPX
• It is recommended to reduce feed
per tooth fz by 30-40%

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