1400 Каталог MITSUBISHI 2015 Токарный и вращающийся инструмент Инструментальные решения Стр.N084

Каталог MITSUBISHI 2015 Металлорежущий инструмент Стр. N084 1400 ENG Lab2u

DRILLING SOLID CARBIDE DRILLS FOR MACHINING OF ALUMINIUM ALLOYS CARBIDE MIMS WSTAR DRILLS OPERATIONAL GUIDANCE FOR MNS...DB DRILLS FLAT FACE DRILLING Drilling a blind hole 1. Drilling a pilot hole 2. Initial cutting with the long type drill Use a drill with a larger (flatter) point angle than the super long type. Mitsubishi type MNS-LB MAE-MB or MAS-MB drill is recommended. Ensure a high precision hole is drilled for the guide. Drill depth Approx 1DC. (Adjust the pilot hole depth according to the length of the long type drill.) Penetrate the guide hole at low revolution. (Cutting speed 20 30m/min feed rate 0.2 0.3mm/rev) Stop the long type drill 1 3mm short of the guide hole bottom. 3. Drill the deep hole 4. Drill retraction After drilling lower the cutting revolution about 1 2mm short of the hole end. (Cutting speed of around 20 30m/min) Retract the drill to the pilot hole depth starting point at a feed rate of 3000mm/min. Finally clear the hole at a cutting speed of 20 30m/min and feed rate of 0.2 0.3mm/rev. INTERRUPED DRILLING Drilling and breaking through on irregular faces or angles 1. Spot facing 2. Drilling a pilot hole Machine a flat or the irregular face by using an end mill or slot drill capable of spot facing. Make the spot face diameter the same size as the required deep hole diameter. Use a drill with a larger (flatter) point angle than the super long type. Mitsubishi type MNS-LB MAE-MB or MAS-MB drill is recommended. Ensure a high precision hole is drilled for the guide. Drill depth Approx 1 DC. (Adjust the pilot hole depth according to the length of the long type drill.) 3. Initial cutting with the long type drill Penetrate the guide hole at a low revolution. (Cutting speed 20 30m/min feed rate 0.2 0.3mm/rev) Stop the long type drill 1 3mm short of the guide hole bottom. 4. Drill the deep hole Start cutting at the recommended speed and feed with a non-peck (continuous feed) cycle. 5. Breaking through When breaking through the cutting edge can be damaged. Afeed rate of 0.05 0.1 mm/rev is recommended. 6. Drill retraction Finally clear the hole at a cutting speed of 20 30m/min and feed rate of 0.2 0.3mm/rev. Retract the drill to the pilot hole depth starting point at a feed rate of 3000mm/min. N084