Каталог Iscar вращающийся инструмент 2017 - страница 661

USER GUIDE Drill Penetration Instructions on 1. Drill a pilot hole 0.5xD deep with a short drill in Milling or Turning Machines: the same diameter as of the SUMOGUN drill. Note: The following procedure (1-4) is recommended 2. Enter the pre-hole at slow speed, feed and 50 for up to 400 mm hole depths using RPM until 1-2 mm before reaching the bottom. MNCNT …-400… drills 3. Activate the cooling system and increase rotation For hole depths between 400 up to 800 mm, use speed to recommended drilling speed, maintain for 2-3 MNCNT …-800… drill only after reaching 400 seconds, then continue at recommended drilling feed. mm depth with an MNCNT …-400… drill. No pecking is required. Apply maximum possible coolant flow rate. 4. After having reached the required depth, reduce speed to 50-100 RPM while exiting from the hole. 1. Pre-hole 1xD deep 2. Slow rotation and 3. Maintain for 2-3 4. Continue drilling for centering feed while entering seconds and activate at recommended to the pre-hole the cooling system cutting conditions 1xD 1xD 1xD SUMOGUN GUNDRILLS Pressure and Coolant Flow Rate for SUMOGUN Bar L/min Guidelines for Optimal 120 300 110 275 Gundrill Performance 100 250 • Coolant pressure and flow 90 225 It is recommended to use a strong coolant flow for 80 200 70 175 efficient chip flushing and cooling of the cutting edge 60 150 • Filtration 50 125 It is recommended to use a filter under 20 µm. 40 100 30 75 Note: Improper filtration may result in interrupted flow 20 50 of the lubricating oil. This creates a sticky surface on 10 25 the bearing pads and leads to premature wear of the Ø 10 12 14 16 18 20 22 24 26 mm tool and overloading the coolant pump and spindle seals. SUMOGUN Drilling Range Drilling Diameter • Temperature of the coolant Q l/min P bar GUNDRILL Machines The coolant temperature should be between Milling and Turning Machines 20 and 22º C. Note: Above 50º C the viscosity of the coolant is reduced by 50% and becomes ineffective. Gundrill Lubrication and Cooling The best performance is obtained by using oil. On equipment that uses water-soluble fluids (i.e. machining centers and CNC machines) a concentration between 10% and 15% is recommended. 657