Каталог Iscar вращающийся инструмент 2017 - страница 540

USER GUIDE Troubleshooting Irregular Conditions for DR Drills If surface slope exceeds 5º, reduce feed by 50% during penetration or exit. It is preferred to pre-face the surface to eliminate slope. 1. Drilling into a pre-hole reduces feed to eliminate deflection (1) of the drill body. 2. Drilling an interrupted cut reduces feed during INDEXABLE DRILLS crossing to eliminate deflection (1) of the drill body. 3. Insufficient stability of workpiece requires additional support. Reduce feed. (1) Deflection may be observed by a mark on the drill body. Note: For irregular applications, , use DR drills with XOMT 1 2 3 inserts as a first priority. Regular Conditions for DR Drills Stacked Plates Drilling operation is not recommended, but may be done by specially designed drills in 16-60 mm range. Apply standard cutting data. Note: For irregular applications, use DR drills with XOMT inserts as a first priority. Indexable Insert Drills - Troubleshooting DR Chips Chip Jamming due to Long Chips Chip Jamming despite Short Chips Solutions Solutions 1. Increase feed. If drilling a 1. Increase coolant very soft material, reduce pressure/volume. feed and increase speed. 2. Reduce cutting speed. 2. Choose a geometry with a tighter chipbreaker for lower feeds (GF). 3. Long chips that rotate around the drill are problematic. If chip formation can not be improved by changing the machining conditions, use a pecking cycle. Chipping Along Cutting Edge Chipping of Center Insert Solutions Excessive Flank Wear Solutions 1. Reduce entrance feed. Solutions 1. Check mounting of drill. 2. Choose a tougher grade. 1. Reduce cutting speed. 2. Check mounting of workpiece. 3. Choose a geometry with open chip breaking 2. Increase coolant 3. Reduce entrance feed. for higher feeds. (SOMT, WOLH) pressure/volume. 4. Reduce cutting speed. 4. Reduce feed.* 3. Choose a better wear 5. Check drill runout (should 5. Reduce cutting speed. resistant grade. be 0.05 mm maximum). 6. Increase coolant pressure. Machine Troubleshooting Vibrations Insufficient Power Solutions Insufficient Torque Solutions 1. Check mounting of drill. Solutions 1. Reduce cutting speed. 2. Check mounting of workpiece. 1. Reduce feed.* 2. Reduce feed.* 3. Increase feed. If drilling a very soft material, 2. Choose a geometry with 3. Choose a geometry with reduce feed and increase speed.* a looser chipformer. a looser chipformer. 4. Reduce cutting speed. * Use GF chipformer 536 536 ISCAR ISCAR