Обший каталог Yamawa 2016 - 2017 - страница 849

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25. Trouble 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 chan i ●Prevent mixing of other oil int ●Use other cutting oil which pre ●Use cutting oil of insoluble typ ●Adjust flow of cutting oil andging or filling-up of cutting oil. o cutting oil. vents cold welding. e. l method of lubrication.
●Remove unnecessary chips
●Provide Nitride on taps.�Use oversiza 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.