Каталог Iscar монолитные сверла 2022 - страница 32

SOLID CARBIDE DRILLS USER GUIDE Troubleshooting Problem Cause Solution Drill breakage • Poor clamping of the chuck • Check the clamping. Use hydraulic clamping chuck, maxin power chuck or a shrink system. • Workpiece movement • Increase workpiece chucking force. • Wrong drill • Check drill type and drilling depth, cooling system and workpiece material. • Insufficient coolant • Check cooling lubricant. Increase coolant pressure. In the case of external coolant supply, improve jet direction and add cooling jets. • Unsuitable cutting conditions • Reduce feed. • Worn out drill center point (chisel) • Regrind cutting edge. • Insufficient chip evacuation • Use pecking cycle. Chipping on the cutting corners • Poor clamping of the chuck • Check the clamping and adaptation. Use hydraulic clamping chuck, maxin power chuck or a shrink system. • Workpiece movement • Increase workpiece chucking force. • Wrong drill • Check drill type and drilling depth, cooling system and workpiece material. Possibly use longer drill. • Insufficient coolant • Check cooling lubricant. Increase coolant pressure. In the case of external coolant supply, improve jet direction and add cooling jets. • Unsuitable cutting conditions • Check cutting parameters, and possibly reduce feed. • Worn out or broken cutting corner • Replace drill or regrind cutting edge. Problem: Burrs on exit • Unsuitable cutting conditions • Reduce feed by 30-50% during exit. • Worn out drill • Replace drill. Rough surface finish • Unsuitable cutting conditions • Adjust feed to improve chip flow. Ra • Large runout • Make sure that the drill’s runout is within 0.02 mm (radial & axial). • Chip jamming • Reduce cutting speed. • Increase coolant pressure. • Apply pecking procedure. Deviation of hole position • Large runout • Make sure that the drill runout is within 0.02 mm (radial & axial). • Poor stability • Check and improve drill and workpiece clamping rigidity. • Rough application • When drilling hard materials or sloped surfaces, reduce feed by 30-50% during entrance. • Use a short pilot drill with 140° point angle. 180 ISCAR