Общий каталог Yamawa 2022 - 2023 - страница 1235

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Trouble ShootingTrouble Shooting 25.25. Trouble ShootingTrouble Shooting

Un Improve cutting performancedersize cutting of internal thre Selection and design of tapad Work materialImprove cutting performanceBad surface, surface damaged Prevent weldingCheck cutting condition
●Check workmaterial.●Use workpiece which has even structure and hardness.
●Pay attention to tapping position and material thick- ness.●Pay attention to tapping position and material thick- ness.
●Adopt bigger bored hole. ●Prevent work hardening of material.
●Prevent work hardening.●Provide bigger bored holes.◯Prevent slanting of hole.
○Feed according to pitch.
●Use the tap holder of floating type. ●Prevent vibrating of axis of tap ●Prevent centering-off with work piece.
●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 typ ●Adjust flow of cutting oil andnging or filling-up of cutting oil. o cutting oil. events cold welding. e. l method of lubrication.
●Remove unnecessary chips
●Provide Nitride on taps.◎Use oversize taps.●Use spiral pointed taps (for through hole).◎Provide oxide coating on taps.◎Use oil hole taps.
○Provide larger cutting angle.●Adjust relief angle on cutting chamfer. ○Provide thread relief.◎Provide larger cutting angle. ●Adjust relief angle on cutting chamfer. ○Provide more narrow margin.●Change of no. of flutes on taps.●Reconsider length of cutting chamfer.
●Increase re-sharpening frequency.●Increase re-sharpening frequency. ●Provide precise re-sharpening ●Be careful about burning durin●Provide better surface finishing on flutes. . g re-sharpening.

Check pointCheck point

HardnessHardness

WorkpieceWorkpiece

Bored holeBored hole

●●Prevent slanting of hole.Prevent slanting of hole.

●●Provide countersinking on Provide countersinking on ◯◯Prevent work hardening.Prevent work hardening.

MachineMachine ●●Adjust feed stroke.Adjust feed stroke.

Jigs, HoldersJigs, Holders ◎◎Use tap holder with torque Use tap holder with torque

Cutting conditionCutting condition

which prevents cold welding.which prevents cold welding. ●●Use insoluble type cutting Use insoluble type cutting

during tapping.during tapping. On processOn process ●●Provide bigger space for Provide bigger space for chips disposal.chips disposal.

SelectionSelection ●●Use SP tap(blind hole).Use SP tap(blind hole). ●●Use Roll tap.Use Roll tap.

TapTap DesignDesign ●●Reconsider length of cutting chamfer.Reconsider length of cutting chamfer. ●●Reconsider length of cutting chamfer.Reconsider length of cutting chamfer. ●●Use set tap.Use set tap. ●●Provide nitride on taps.Provide nitride on taps.

●●Be careful about burning during re-sharpening.Be careful about burning during re-sharpening. Technical Inf ◎◎ : Most suitable solution : Most suitable solution ○○ : Second most suitable solution : Second most suitable solution