Каталог Iscar вращающийся инструмент 2017 - страница 514

USER GUIDE Troubleshooting Built-Up Edge 1. Increase cutting speed/feed. 2. Increase coolant pressure. INDEXABLE DRILLS Deviation of Hole Tolerance 1. Check the runout and make sure it is within 0.03 Ø > D nominal + 0.15mm mm T.I.R. (radial and axial cutting points). D nominal Ø < D nominal - 0.03mm 2. Reduce feed rate. 3. Check the chisel point runout and make sure it is within 0.03 mm T.I.R. 4. Worn cutting edge. Replace head. 5. Increase workpiece chucking force. 6. Increase internal coolant pressure. Surface Finish Too Rough 1. Check the runout and make sure it is within 0.03 mm T.I.R. (radial and axial). Ra 2. Adjust the feed for improved chip formation. 3. In case of chip jamming - increase the coolant flow and/or reduce the cutting speed. 4. Increase the coolant pressure. 5. Check the chisel point runout and make sure it is within 0.03 mm T.I.R. 6. Use pecking cycle. 7. Replace the drilling head Hole Not Straight • Drill a pre-hole for centering (check recommendations for pre-hole operation). • Increase coolant pressure; improve jet direction in case of external coolant supply. • Increase the feed. Inaccurate Hole Position 1. Check the runout and make sure it is within 0.03 mm T.I.R. (radial and axial). 2. Check the stability of the machine spindle, tool and workpiece clamping rigidity. 3. When drilling rough, hard or sloped surfaces (up to 7°), reduce the feed rate by 50%-70% when entering. 4. Drill a pre-hole with a 140° point angle for centering. 5. Check the chisel point runout and make sure it is within 0.03 mm T.I.R. Burrs on Exit 1. Reduce the feed rate by 50%-70% when exiting. 2. Replace the worn head. 510 510 ISCAR ISCAR