Обший каталог Yamawa 2016 - 2017 - страница 848

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25. Trouble Shooting Description of products Troubles Breakage Excessive wear Check point Segments Prevent excessive Prevent clogging of chips Tap Workpiece Tap cutting torque ●Use workpiece which has Use workpiece which has even structure and hardness. even structure and hardness. Hardness ●Pay attention to tapping position and material thickness. ●Pay attention to tapping position and material thick- Shape ness. Workpiece Provide bigger bored holes. Provide bigger bored holes. ●Prevent work hardening. ●Provide countersinking on hole entrance. Bored hole Prevent work hardening. Provide deeper tapping hole. ●Prevent slanting of hole. ●Avoid inconsistent feed. Machine ●Adjust feed stroke. ●Use tap holder of floating type. Jigs, Holders Use tap holder with torque limitter. Reduce cutting speed. Reduce cutting speed. Cutting condition ●Use the other cutting oil ●Provide proper timing for changing or filling-up of cutting oil. which prevents cold welding. ●Prevent mixing of other oil into cutting oil. ●Use insoluble type cutting Lubricant oil. ●Use other cutting oil which prevents cold welding. ●Use cutting oil of insoluble type. ●Adjust flow of cutting oil and method of lubrication. ●Remove unnecessary chips during tapping. On process ●Provide bigger space for chips disposal. ●Use PO tap(through hole). Selection ●Use SP tap(blind hole). ●Use Roll tap. ●Provide bigger chiproom. ●Change material of taps. ●Use serial set tap. ●Provide proper hardness on ●Change material of taps. taps. ●Provide proper hardness on Tap Design taps. ●Reconsider length of cutting chamfer. ●Reconsider length of cutting chamfer. ●Use set tap. ●Provide nitride on taps. ●Be careful about burning during re-sharpening. ●Be careful about burning during re-sharpening. Technical Information Re-grind ●Provide proper land. ●Increase re-sharpening frequency. : Most suitable solution   : Second most suitable solution Technical-73 844