Каталог Iscar сверла со сменной режущей частью 2022 - страница 130

INDEXABLE DRILLS USER GUIDE Chip jamming Broken Screw • Use recommended torque wrench • Lubricate the screw before tightening Rotating drill • Improve chip formation (change chipbreaker type or cutting condition) Insufficient machine power- • Increase coolant pressure Non-rotating drill • Improve chip formation (change chipbreaker type or cutting condition) • Increase coolant pressure • Reduce speed and feed Deflection • Use recommended chipbreaker for low feed Insufficient machine torque Rotating drill • Use shorter drill overhang (if possible)•Reduce feed by 30-50%•Checkthat overlapping is correct•Reduce feed•Use recommended chipbreaker for low feed between inner and outer inserts • Check inner insert is positioned over center within its limits • Increase coolant pressure Chip Formation Problems • Change the insert chipbreaker • Stabilize clamping device Long chip/ Chip jamming: Non-rotating drill This typical problem with stainless or low carbon steel,can affect hole quality, especially on surface finish, and • Check misalignment in some cases can cause insert or tool breakage. • Check that overlapping is correct between inner and outer inserts•Checkinnerinsert is positioned over center within its limitsOptimal ShapeToo Long Too Tight • Rotate drill 180 degrees • Increase coolant pressure • Change the insert chipbreaker If machining at Increase high speed, first speed within reduce speed. recommended If unsatisfactory, limits. If not increase feed, but satisfactory, do not exceed decrease feed. upper limit. 128 ISCAR