Общий каталог Mitsubishi 2020 - 2021 - страница 1280

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y CUTTING CONDITIONS FOR SLOT MILLING ( inch) DC Cutting Width &.500"─&.625"(&12─&16 mm) &.750"─&1.000"(&20─&25 mm) &1.250"─&3.000"(&28─&100 mm) Work Material Properties ae Depth of Cut Feed per Tooth Depth of Cut Feed per Tooth Depth of Cut Feed per Tooth ap fz (IPT) ap fz (IPT) ap fz (IPT) N < .157 .006 < .157 .010 < .157 .008 < .25DC .157─.276 .004 .157─.276 .006 .157─.276 .004 < .157 .004 < .157 .008 < .157 .008 Aluminum Alloy ─ .25─.5DC .157─.276 .004 .157─.276 .004 .157─.276 .004 .5─.75DC < .197 .004 < .197 .006 < .197 .004 DC (Slot) < .197 .004 < .197 .008 < .197 .006 S < .157 .006 < .157 .006 < .157 .004 < .25DC Titanium Alloy < 350HB .157─.276 .004 .157─.276 .004 .157─.276 .003 .25─.5DC < .118 .002 < .118 .002 < .118 .002 .5─.75DC < .079 .004 < .079 .002 < .079 .002 Heat Resistant Alloy ─ DC (Slot) < .039 .002 < .039 .002 < .039 .002 H < .157 .004 < .197 .006 < .197 .006 < .25DC .157─.276 .003 .197─.276 .004 .197─.276 .004 .276─.335 .003 Hardened Steel 40─55HRC .25─.5DC < .079 .004 < .118 .006 < .118 .006 .079─.197 .003 .118─.217 .004 .5─.75DC < .157 .003 < .157 .003 < .118 .003 DC (Slot) < .118 .003 < .157 .003 < .118 .003 Note 1) These cutting conditions are a guide to the standard shank type and the arbor type. Please make adjustments according to the machining conditions. Note 2) Vibration is liable to occur in certain cases. Please reduce the depth of cut and / or reduce cutting conditions in the following cases. • When using the long shank type and extra long shank type. • When using long tool overhang with the standard or arbor type. • When the application has poor clamping rigidity or when using a low rigidity machine. Note 3) In case of coarse and fine pitch cutters, the coarse pitch type is recommended to prevent vibration. Note 4) For heavy interrupted and unstable cutting, the H breaker is first recommendation. y RAMPING/HELICAL MILLING a Ramping a Helical Milling Blind Holes, Through Holes Flat Bottom Pitch Pitch (P) (P) APMX RMPX APMX DC DC DC Hole Hole Diameter Diameter Refer to the table below when using .031 inch radius for maximum ramping angle, (DH) (DH) pitch and minimum/maximum hole diameter. Use cutting conditions for slot milling to calculate speed and feed when ramping / helical milling. Ramping Helical Milling (Blind Hole, Flat Bottom) Helical Milling (Through Hole) Cutting Edge Maximum Minimum Maximum Maximum Minimum Maximum Minimum Maximum Diameter * L DC Ramping Angle Distance 1 L * Hole Diameter 2 DH max. Pitch P max. Hole Diameter DH min. Pitch P max. Hole Diameter DH min. Pitch P max. (inch) RMPX (inch) (inch) (inch) (inch) (inch) (inch) (inch) INDEXABLE MILLING .500 6.0° 3.8 0.92 .09 .87 .07 .63 .020 .625 11.5° 1.9 1.17 .35 1.1 .27 .79 .079 .750 7.5° 3.0 1.42 .19 1.35 .17 1.03 .079 1.000 4.5° 5.0 1.92 .23 1.85 .19 1.58 .079 1.250 3.1° 7.3 2.42 .17 2.35 .15 2.05 .079 1.500 2.3° 9.8 2.92 .15 2.85 .13 2.56 .079 2.000 1.6° 14.1 3.92 .07 3.85 .07 3.55 .079 2.500 1.3° 17.4 4.92 .07 4.85 .07 4.56 .079 3.000 1.0° 22.6 5.92 .07 5.85 .07 5.52 .079 *12 L(=.394"/tan%). Cutters' moving distance until depth of cut reaches .394" at a maximum ramping angle. * {(cutting edge diameter DC) - (corner radius) - .008"} x 2 In case corner radius of .031". Other than that, find with the below formula. Note 1) When machining highly ductile materials with ramping angles above, chips could be continuous. In this case, decrease the ramping angle or feed per tooth. L105