Каталог Iscar сверла со сменной режущей частью 2022 - страница 83

INDEXABLE DRILLS USER GUIDE Troubleshooting Cutting Edge Chipping 1 Check the stability of the machine spindle, tool and workpiece clamping rigidity. 2 Reduce feed rate, increase speed. 3 If the drill vibrates, reduce cutting speed and increase feed rate. 4 When drilling rough, hard or angled (up to 12° angular surface), reduce the feed rate by 30-50%. 5 Check cooling lubricant. Increase coolant pressure. In case of external coolant supply, improve jet direction and add cooling jets. Chisel Area Chipping 1 Reduce feed rate. 2 Increase coolant pressure. 3 Increase workpiece chucking force. Excessive Flank Wear 4 Reduce cutting speed. 5 Increase internal coolant pressure. Excessive Land Wear 1 Check the runout and make sure it is within 0.02 mm T.I.R. (radial and axial). 2 Reduce cutting speed. 3 When drilling rough, hard or angled (up to 12° angular surface), reduce the feed rate by 30-50%. 4 Increase coolant pressure. 5 Check the chisel point runout and make sure it is within 0.02 mm T.I.R. 6 Increase workpiece chucking force stability and rigidity. Built-Up Edge 1 Increase cutting speed/feed. 2 Increase Inaccurate Hole Position 1 Check the runout and make sure it is within 0.02 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 30%-50% 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 0.02 mm T.I.R. Deviation of Hole Tolerance 1 Check the runout and make sure it is within 0.02 mm T.I.R. (radial and axial cutting points). Ø > D nominal + 0.15mm 2 Reduce feed rate. D nominalØ < D nominal - 0.03mm3 Check the chisel point runout and make sure that it is within 0.02 mm T.I.R. 4 Wrong cutting edge. Replace head. 5 Increase workpiece chucking force. 6 Increase internal coolant pressure. Burrs on Exit 1 Reduce the feed rate by 50%-70% during exit. 2 Replace the worn head. Surface Finish Too Rough 1 Check the runout and make sure it is within 0.02 mm T.I.R. (radial and axial). 2 Adjust the feed for improved chip formation. Ra 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 0.02 mm T.I.R. 6 Use pecking cycle. 7 Replace the drilling head. 81