Обший каталог Yamawa 2016 - 2017 - страница 851

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25. Trouble Shooting Chipping Tapping operation Description of products Prevent clogging of chips Prevent excessive Improve tapping method Tap Prevent clogging of chips Tap cutting torque ●Use workpiece material which has even structure and hardness. Pay attention to tapping ●If possible, use finer pitch tap or shorter tapping length. position and material thick- ness. Provide deeper tapping hole Provide bigger bored hole. ●Prevent slanting of holes. Provide bigger bored hole. (Blind hole). ●Prevent work hardnening. Provide deeper tapping hole (Blind hole). ●Provide countersinking on hole the entrance. ●Avoid inconsistent feed. Use tapping holder with ●Prevent centering-off with ●Use the tap holder of floating type. torque limitter. workpiece. ●Prevent vibration of axis of tap. ●Prevent vibration of axis of tap. ●Prevent centering-off with ●Use the tap holder of floating type. workpiece. ●Reduce cutting speed. ●Reduce cutting speed. ●Use the other cutting oil ●Check the viscosity. which prevent cold welding. ●Remove unnecessary chips ●Remove unnecessary chips during tapping. during tapping. ●Provide bigger space for chip ●Provide bigger space for chip disposal. disposal. ●Use PO taps (Through hole). ●Use PO taps (Through hole). ●Use SP taps (Blind hole). ●Use SP taps (Blind hole). ●Use Roll tap. ●Use Roll tap. ●Provide bigger chip room. ●Change material of tap. ●Provide bigger chip room. ●Provide smaller cutting angle. ●Reconsider length of cutting chamfer. ●Provide proper hardness. Use oil hole tap. ●Reconsider length of cutting chamfer. ●Provide shorter thread length to tap. ●Use set tap(Serial or conventional). ●Adjust relief angle on cutting chamfer. ●Be careful about burning during re-sharpening. Information Technical Technical-76 847