Общий каталог Mitsubishi 2020 - 2021 - страница 1294

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y Ramping / Helical Milling

a Ramping aa Helical Milling Blind Holes, Through Holes

Flat Bottom Pitch Pitch (P) (P)

APMX RMPX APMX

DCDCDC
HoleHole
DiameterDiameter
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.

RampingHelical Milling (Blind Hole,Flat Bottom)Helical Milling (Through Hole)
Cutting Edge Diameter DC (inch)Maximum Ramping Angle RMPXMinimum Distance 1 L (inch)Maximum Hole Diameter 2 DH max. (inch)Maximum Pitch P max. (inch)Minimum Hole Diameter DH min. (inch)Maximum Pitch P max. (inch)Minimum Hole Diameter DH min. (inch)Maximum Pitch P max. (inch)
.75014°2.71.42.511.31.43.80.019
1.00011°3.41.92.551.81.471.30.157
1.2507°5.42.42.432.31.391.80.196
1.5007°5.42.92.512.81.472.30.275
2.0004°9.43.92.393.81.393.30.275
2.5002°18.84.92.234.81.234.30.157
3.0002°18.85.92.315.81.275.30.236
4.0001.5°25.17.92.317.81.277.30.236

*1 L(=.591"/tan%). Cutters' moving distance until depth of cut reaches .591" at a maximum ramping angle. *2 In case corner radius of .031". Other than that, find with the below formula. {(cutting edge diameter DC) - (corner radius) - .008"} x 2 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