Sharp V-1 General & Electrics Manual page 100

SHARP
8.1.2 TABLE B (FOR MILLING)
Problem
Cutter misalignment during
rotation
Vibration during milling
Loose of End milling cutter
Deformation of workpiece
Discontinuity occurred in
plain milling
Actual cutting depth does
not match the setting value
Diagnostics
Misalignment in cutter itself
Misalignment while mounting
cutter
Bending of shank
Workpiece moving up while
up milling
Shank is long and small
Large backlash of lead screw
Workpiece is not clamped
well
Heavy load in cutting
The frequency of cutting force
variation is close to machine
natural frequency
Axial force acts toward the
direction away from spindle
Workpiece is not clamped
properly
Damage on table surface
residual stress in workpiece
The center of spindle is not
perpendicular to table or
saddle
Thermal deformation
Shank deforms while milling
Workpiece deformed and was
not fixed well
CH8-3
V-1 KNEE MILL GENERAL MANUAL
Troubleshooting
Properly grinding of cutter
and cutting edge
Reducing clearance between
shank and hole
Grinding the shank properly,
reducing tangential forces,
and clearing debris
Using oblique cutting and
down milling
Increasing rigidity of shank
Adjusting the blacklash
Clamping workpiece firm ly
Reducing spindle speed,
cutting depth, and feeding
rate
Using cutter with less teeth
Selecting proper oblique and
rotational to change the
direction of axial force
Change clamping style and
do not put excessive
clamping force during
finishing cutting
Smoothing the table surface
Annealing workpiece
thoroughly
Modifying the sliding way and
making it to be
perpendicular to spindle
Controlling the temperature
rising of machine
Increasing the rigidity of
shank and reducing cutting
force
Fixing the workpiece properly
KRDM24C0 V4.0S