Общий каталог Mitsubishi 2020 - 2021 - страница 1294

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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 Diameter Maximum Minimum Maximum Maximum Minimum Maximum Minimum Maximum DC (inch) Ramping Angle Distance 1 L * DH max. * Hole Diameter 2 Pitch P max. Hole Diameter DH min. Pitch P max. Hole Diameter DH min. Pitch P max. RMPX (inch) (inch) (inch) (inch) (inch) (inch) (inch) .750 14° 2.7 1.42 .51 1.31 .43 .80 .019 1.000 11° 3.4 1.92 .55 1.81 .47 1.30 .157 1.250 7° 5.4 2.42 .43 2.31 .39 1.80 .196 1.500 7° 5.4 2.92 .51 2.81 .47 2.30 .275 2.000 4° 9.4 3.92 .39 3.81 .39 3.30 .275 2.500 2° 18.8 4.92 .23 4.81 .23 4.30 .157 3.000 2° 18.8 5.92 .31 5.81 .27 5.30 .236 4.000 1.5° 25.1 7.92 .31 7.81 .27 7.30 .236 *12 LIn(=.591"/tan%). Cutters' moving distance until depth of cut reaches .591" at a maximum ramping angle. * {(cutting edge diameter DC) - (corner radius) - .008"} x 2 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. L INDEXABLE MILLING L119