540 Каталог ISCAR 2017 Вращающийся режущий инструмент и инструментальная оснастка Стр.536

Каталог ISCAR 2017 Ротационный инструмент Стр. 536 0540 ENG Lab2u

INDEXABLE DRILLS DR-TWIST INDEXABLE DRILL LINE USER GUIDE Troubleshooting Irregular Conditions for DR Drills Regular Conditions for DR Drills If surface slope exceeds 5°, reduce feed by 50% during penetration or exit. It is preferred to pre-face the surface to eliminate slope. Drilling into a pre-hole reduces feed to eliminate deflection(1) of the drill body. Drilling an interrupted cut reduces feed during crossing to eliminate deflection(1) of the drill body. 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 inserts as a first priority. 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 1. Increase feed. If drilling a very soft material, reduce feed and increase 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. Solutions 1. Increase coolant pressure/volume. 2. Reduce cutting speed. Chipping Along Cutting Edge Solutions 1. Reduce entrance feed. 2. Choose a tougher grade. 3. Choose a geometry with open chip breaking for higher feeds. (SOMT, WOLH) 4. Reduce feed. 5. Reduce cutting speed. 6. Increase coolant pressure. Chipping of Center Insert Solutions 1. Check mounting of drill. 2. Check mounting of workpiece. 3. Reduce entrance feed. 4. Reduce cutting speed. 5. Check drill runout (should be 0.05 mm maximum). Excessive Flank Wear Solutions 1. Reduce cutting speed. 2. Increase coolant pressure/volume. 3. Choose a better wear resistant grade. Machine Troubleshooting Vibrations Solutions 1. Check mounting of drill. 2. Check mounting of workpiece. 3. Increase feed. If drilling a very soft material, reduce feed and increase speed. 4. Reduce cutting speed. Insufficient Torque Solutions 1. Reduce feed. 2. Choose a geometry with a looser chipformer. Insufficient Power Solutions 1. Reduce cutting speed. 2. Reduce feed. 3. Choose a geometry with a looser chipformer. Use GF chipformer 536 ISCAR