Каталог Iscar вращающийся инструмент 2017 - страница 533

USER GUIDE INDEXABLE DRILLS Insert Positioning Machining Conditions Cooling Methods Directing the coolant through the tool is essential for reliable machining. This method prevents chip pile up, insert damage or breakage, and damage to the workpiece surface. Rotating Drills Internal Coolant External Coolant For best results: Apply standard cutting data. Drilling depth is limited to 1.5xD. 1. Check adapter rigidity. For larger depths, a pecking 2. Minimize drill runout in relation cycle is recommended. to spindle center line. 3. Use recommended cutting conditions. How to Select Cutting Parameters Step 2 - Initial Test Hole Drilling Step 1 - Prior to Drilling • Evaluate chip evacuation. If not satisfactory, adjust • Use charts on pages 532-533 to select feed feed and speed, using example photos below. and speed according to workpiece material. • If chip evacuation is still a problem, i.e. chips are too • For the first grade choice. In general we long, change the chipbreaker to GF as shown below. recommend selecting IC808. Too Tight Too Long SOMT/SOMX may cause insert damage Optimal Shape may cause tool damage Optimizing Chip Shape How To Achieve Optimal Chip Shape Chip control is one of the most important factors for Too Long tool performance in order Too Tight If machining at high speed, to facilitate chip evacuation Increase speed within first reduce speed. and avoid tool damage. recommended limits. Optimal Shape If unsatisfactory, increase Cutting conditions must If not satisfactory, feed, but do not be adjusted to achieve decrease feed. exceed upper limit. optimal chip shape. 529