Общий каталог Yamawa 2021 - страница 703

• Copertina
• Capitoli web
• Parte finale web

20. Troubleshooting Intro Troubles Breakage Excessive wear SP Check point Prevent excessive Prevent clogging of chips Tap Workpiece Tap cutting torque Segments ∙ Use workpiece which ∙ Use workpiece which Hardness has regular structure has regular structure SL and hardness. and hardness. ∙ Pay attention to ∙ Pay attention to tapping position and material Shape tapping position and thickness. material thickness. PO Workpiece ∙ Provide bigger bored ∙ Provide bigger bored holes. holes. ∙ Provide countersinking ∙ Prevent work on hole entrance. hardening. ∙ Prevent work ST Bored hole hardening ∙ Provide deeper bored hole. ∙ Prevent slanting of hole. ROLL ∙ Avoid inconsistent Machine feed. ∙ Adjust feed stroke CARBIDE ∙ Use holder floating type. Jigs, Holders ∙ Use tap holder with torque limiter. LONG Cutting condition ∙ Reduce cutting speed ∙ Reduce cutting speed ∙ Provide proper timing for changing or filling-up of HAND cutting oil. TAPS ∙ Use cutting oil which ∙ Prevent mixing of different type of oil. Lubricant prevents cold welding. ∙ Use cutting oil which prevents cold welding. ∙ Use cutting oil. ∙ Use cutting oil. ∙ Adjust flow of cutting oil and method of lubrication. EG (STI) ∙ Remove unnecessary chips during tapping. On process ∙ Provide bigger space for chips disposal. SPECIAL THREADS, GAUGES ∙ Use PO tap (through hole). Selection ∙ Use SP tap (blind hole). ∙ Use roll tap. THREAD MILLS ∙ Use serial set tap. ∙ Change material of ∙ Change material of ∙ Provide bigger taps. taps. chiproom. ∙ Provide proper ∙ Provide proper Design hardness on taps. DIES Tap hardness on taps. ∙ Reconsider length of cutting chamfer. ∙ Reconsider length of cutting chamfer. ∙ Use set tap. ∙ Provide nitride on taps. CENTER DRILLS ∙ Be careful about burning during re-sharpening. ∙ Be careful about burning during re-sharpening. Regrind ∙ Provide proper land. ∙ Increase re-sharpening frequency. Technical info 704