Общий каталог Sumitomo 2019 - 2020 - страница 935

150˚ OthersBrazedReamersIndexableIndexableInsert TypeHead TypeSolidDrilling Super MultiDrills XHGS Type / PHT Type ■ Recommended Drilling Method (1) Make a guide hole using the PHT type  Select the same nominal diameter for the PHT type dedicated guide hole drill as the XHGS type deep hole drill. (The guide drill diameter is designed to be 0.02 mm to 0.05 mm larger than the long drill diameter.) H H = Drill diameter × 1.5 to 2.0 times the depth (2) Feed the XHGS type deep hole drill through the guide hole at low rotation speed J  Spindle Speed: 500min-1  Feed Rate: 1000 to 2000mm/min * If the drill is inserted into the guide hole at the set cutting speed, peripheral run-out may cause damage to the drill's peripheral edges. Stop 1mm away from the guide hole depth 1 (3) Increase rotation speed until the set cutting speed is reached, then start normal drilling operation * On some NC machines, the feed command may be activated before the set spindle speed Increase rotation speed is reached, so it is recommended to enter a dwell sequence before the feed command. (4) After drilling, rotation speed is reduced and the drill is retracted from the work material  Spindle speed: 500min-1 Feed rate: 1,000 to 2,000mm/min * Retracting a drill from the work material at a high rotation speed is dangerous as doing so Change rotation speed to 500 min-1 may result in breakage due to runout. (5) Other notes  A flat base should be prepared first if the entry side is a non-flat surface (slanted surface, cylindrical surface, etc.). Spot facing using an endmill or flat MultiDrill MDF type (see page J34) Concave ended endmills cannot be used.  If the exit side is a non-flat surface, reduce the feed rate to f=0.05mm/rev immediately before the breakthrough point to prevent the drill from breaking or burrs from forming. ■ Coolant (1) Internal coolant supply  Use coolant equivalent to JIS A1-1 (emulsion).  Pump pressure Steel: 1. 5 to 2. 0MPa (higher pressure results in a stronger cooling effect, which affects chips and wear) Cast iron and aluminum alloy: 4. 0 to 6. 0MPa (prioritize cooling performance) (2) Internal MQL  Air pressure : 0.5MPa or greater  Evacuation volume : It is recommended to set the maximum evacuation volume for your equipment. *Consult the manufacturer if you intend to machine aluminum alloy. (3) Internal dual-fluid mist  Air pressure : 0.5MPa or greater  Evacuation volume : It is recommended to use the optimal setting for your equipment. J75