1368 Каталог MITSUBISHI 2015 Токарный и вращающийся инструмент Инструментальные решения Стр.N052

Каталог MITSUBISHI 2015 Металлорежущий инструмент Стр. N052 1368 ENG Lab2u

DRILLING DRILLING (SOLID CARBIDE) CARBIDE MWS WSTAR DRILLS DB Type Drill(L D10 DC3) OPERATIONAL GUIDANCE FLAT FACE DRILLING Drilling a blind hole 1. Drilling a pilot hole 2. Initial cutting with the long type drill Use the SB type drill. 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.) (DPenetrate the guide hole at low revolution. (Revolution lOOOmin'1 feed rate 0.2 0.3mm/rev) Stop the long type drill 0.5 1.0mm short of the guide hole bottom. 3. Drill the deep hole 4. Drill retraction After drilling lower the cutting revolution about 0.5 1.0mm short of the hole end. (Revolution of around 1000min1) 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 11. 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 long type. TheMWS-SB type 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. (Revolution 1000min-1 feed rate 0.2 0.3mm/rev) Stop the long type drill 0.5 1.0mm short of the guide hole bottom. 5. Breaking through 4. Drill the deep hole When breaking through the cutting edge can be dam Feed rate should be half the normal feed. aged. Finally clear the hole at a revolution speed of 1000min-1 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. N052