Обший каталог Yamawa 2016 - 2017 - страница 848

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Trouble Shooting 25.

Troubles Check pointBreakageExcessive wear
SegmentsPrevent excessive cutting torquePrevent clogging of chipsTapWorkpieceTap
Hardness●Use workpiece which has even structure and hardness.�Use workpiece which has even structure and hardness.
Shape●Pay attention to tapping position and material thickness.●Pay attention to tapping position and material thick- ness.
Workpiece Bored hole�Provide bigger bored holes. ●Prevent work hardening.�Provide bigger bored holes. ●Provide countersinking on hole entrance. �Prevent work hardening.
�Provide deeper tapping hole. ●Prevent slanting of hole.
Machine●Avoid inconsistent feed. ●Adjust feed stroke.
Jigs, Holders●Use tap holder of floating type. �Use tap holder with torque limitter.
Cutting condition Lubricant�Reduce cutting speed. ●Use the other cutting oil which prevents cold welding. ●Use insoluble type cutting oil.�Reduce cutting speed. ●Provide proper timing for cha i ●Prevent mixing of other oil int ●Use other cutting oil which pr ●Use cutting oil of insoluble ty ●Adjust flow of cutting oil andnging or filling-up of cutting oil. o cutting oil. events cold welding. pe. l method of lubrication.
On process●Remove unnecessary chips during tapping. ●Provide bigger space for chips disposal.
Selection●Use PO tap(through hole). ●Use SP tap(blind hole). ●Use Roll tap.
Desin Ta●Provide bigger chiproom.●Change material of taps. ●Provide proper hardness on taps.●Use serial set tap. ●Change material of taps. ●Provide proper hardness on taps.
g p●Reconsider length of cutting c ●Use set tap.hamfer.●Reconsider length of cutting c ●Provide nitride on taps.hamfer.
Re-grind●Be careful about burning duri ●Provide proper land.ng re-sharpening.●Be careful about burning duri ●Increase re-sharpening frequeng re-sharpening. ncy.

: Most suitable solution : Second most suitable solution