Каталог Iscar сверла со сменной режущей частью 2022 - страница 79

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 sloped surfaces (up to 7°), reduce the feed rate by 30-50% when entering and exiting. 5 Check cooling lubricant and 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 Check the adaptation. Use hydraulic clamping chuck, MAXIN power chuck or side lock systems. 4 Increase workpiece chucking force. Excessive Flank Wear 1 Check that the correct geometry is used. 2 Reduce cutting speed. 3 Increase internal coolant pressure. Excessive Flute Land Wear 1 Check that the correct geometry is used. 2 Check the runout and make sure it is within 0.02 mm T.I.R. (radial and axial). 3 Reduce cutting speed. 4 When drilling rough, hard or sloped surfaces (up to 7°), reduce the feed rate by 30-50% when entering and exiting. 5 Increase coolant pressure. 6 Check the chisel point runout and make sure it is within 0.02 mm T.I.R. 7 Increase workpiece chucking force stability and rigidity. 8 If there is low pocket gripping force - replace drill body. Built-Up Edge 1 Increase cutting speed/feed. 2 Increase coolant pressure. 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). 2 Reduce feed rate. Ø > D nominal + 0.15mm 3 Check the chisel point runout and make sure that it is within 0.02 mm T.I.R. D nominalØ < D nominal - 0.03mm4 Wrong cutting edge. Replace head. 5 Increase workpiece chucking force. 6 Check the adaptation. Use hydraulic clamping chuck, MAXIN power chuck or side clamping systems. 7 Increase internal coolant pressure. 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 Use double margin geometry. Hole Not Straight: 1 Use 2M geometry. 2 Drill a pre-hole for centering (check recommendations for pre-hole operation). 3 Increase coolant pressure, improve jet direction in case of external coolant supply. 4 Increase the feed. 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. Burrs on Exit 1 Reduce the feed rate by 30%-50% when exiting. 2 Replace the worn head. 3 Check the adaptation. Use hydraulic clamping chuck, MAXIN power chuck or side clamping systems. 77