Общий каталог Tungaloy 2020 - 2021 - страница 1668

Предыдущая страница Следующая страница

Навигация

Troubleshooting for indexable drills

ProblemCauseCountermeasure
toolMisalignment of workpiece rotation Offset machining in excess of allowable range¡Set the misalignment to 0 ~ 0.2 mm. ¡Use the tool in the allowable offset range.
theOffset direction reduced diameter of workpiece¡Set offset direction extended diameter of workpiece
onNo fl atness of the entr surface¡Flatten the entry surface in pre-machining.
The tool periphery arksl y¡Set the feed for lower than 0.05 mm/rev in rough surface area.
h mChippingofperipheral cuttingedge¡Exchange the insert.
atcBend of workpiece¡Change to the clampmethod with rigidity.
cr¡Increase the cutting speed by 20 % and lower the feed by 20 % within standard conditions.
SChip packing¡Raise the fl uidpressure(for higher than 1.5 MPa).
Misalignment for workpiece rotation¡Set the misalignment to 0 ~ 0.2 mm.
Inappropriate offset contents¡Adjust offset contents.
Hole diameter yNo fl atness of the entry surface¡Flatten the entry surface in pre-machining.
acl¡Set the feed for lower than 0.05 mm/rev at rough surface area.
ccurBend of workpiece¡Change to the clampmethod with rigidity.
e a¡The concentration of cutting fl uid must be higher than 5 %.
holVarieties and supply of cutting fl uid¡Use the cutting fl uid superior in lubricity.
Roughness ate¡Change to internal cuttingfl uid supplyfrom external one.
opriInaroriate cuttin conditions¡Increase the cutting speed by 20 % within standard conditions.
pprppp g¡Lower the feed by20 % within standard conditions.
InaFailures of inserts¡Exchange the insert.
¡Increase the cutting speed by 20 % and lower the feed by 20 % within standard conditions.
CommonChip packing¡Raise the fl uidpressure(for higher than 1.5 MPa).
Looseness of screws¡Tighten the screw.
¡Work within standard conditions.
Inappropriate cutting conditions¡Increase the cutting speed by 10 % within standard conditions. ¡Increase the feed by 10 % within standard conditions.
Failures of inserts¡Exchange inserts.
Prolonged and twisted of chipsMachining by external fl uid supply¡Change to internal cutting fl uid supply from external one. ¡Work by step feed.
trol¡Use dwell function for 0.1 sec approximately.
Chip conChips around the central cutting edge¡There is a tendency to shorten the chips when shifting to higher speed and feed.
Chi kinFluid supply¡Change to internal cutting fl uid supply from external one. ¡Raise the fl uidpressure(for higher than 1.5 MPa).
p pacg¡Increase the cutting speed by 20 % and lower the feed by 20 % within standard conditions.
Inappropriate cutting conditions¡Raise the fl uidpressure(for higher than 1.5 MPa).
CommonLarge failure of drill holders¡Exchange the drill holder.
Looseness of screws¡Tighten the screw.
Inappropriate cutting conditions¡Lower the cutting speed by 20 % within standard conditions. ¡Increase the feed by10 % within standard conditions.
Large wear of inserts¡Exchange the insert.
Chatter¡Change to the machine with higher torque rigidity.
Vibration in drilling¡Change to the clamp method with rigidity.
¡Change the drill settingmethod.
ersLooseness of screws¡Tighten the screw.
OthInsuffi cient machinepower and torque¡Use the range of number of revolutions suited machine spec. Lower the feed by 20 ~ 50%.
Machine stopBurned inserts¡Exchange inserts before the failure becomes larger. ¡Check the oil-hole plug screw is tightly screwed in place. ¡Check that the fl uid fl ows powerfully from the drill. ¡Lower the cutting speed and the feed by 20 % within standard conditions.
Failures of inserts¡Exchange the insert.
Large burrInappropriate cutting conditions¡Lower the feed by 20 ~ 50% just before leaving from the workpiece.