Обший каталог Yamawa 2016 - 2017 - страница 851

25. 25. Trouble Shooting

Chipping Tapping operation Prevent excessive

Prevent clogging of chips 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 thickness.

• 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 during tapping. ●Provide bigger space for chip disposal.

• Provide bigger chip room.

●Reconsider length of cutting chamfer. ●Use set tap(Serial or conventional). ●Adjust relief angle on cutting chamfer.

●Be careful about burning during re-sharpening.

●Remove unnecessary chips during tapping. ●Provide bigger space for chip 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. ●Change material of tap. ●Provide bigger chip room. ●Provide smaller cutting angle. ●Reconsider length of cutting chamfer. ●Provide proper hardness. Use oil hole tap. ●Provide shorter thread length to tap.