Общий каталог Tungaloy 2020 - 2021 - страница 1649

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Rp RE Rth Rth GradeInsertExt. ToolholderInt. ToolholderThreadingGroovingMiniature toolMilling cutterEndmillDrilling toolTooling SystemUser's GuideIndex User’s Guide - Technical Reference A Milling tools Roughness of finished surface B (1) Theoretical surface roughness Theoretical roughness as shown below, is the same as for single point turning ᭹With corner radius RE ᭹Without corner radius RE Rth： Theoretical roughness (μm) C α β fz ： Feed per tooth (mm/t) RE α β RE： Corner radius (mm) α： Corner angleβ： Face cutting edge angle D α fz βfz E F (2) Actual surface roughness A facemill cutter in practice is composed of multiple point cutting edges and is prone to create uneven peaks, or an axial runout error (Rp) on cuttingedges. One or two cutting edges being non-coplanar to the rest invariablycreate the dominant mark on a face-milled surface, producing periodicG patterns corresponding to the feed per revolution f (mm/rev) superimposing fz (Feed per tooth) on the feed per tooth fz (mm/t).f(Feed) H Improving surface roughness Face run out must be minimized and a low feed and high speed should be used. I Insert Also, in order to attain good finished surface at high efficiency, there are the SPCN42ZFR following methods: Body (1) In case of ordinary millLocatorUse wiper insert as shown in the figure at left.(2)Use of super finish mill for finishing.J • Use of combination mills with finishing insert such as TFD4400-A and 0.03 ~ 0.08 TFP4000IA (ap < 1.0 mm). • Use of super finish mill for finishing such as NMS cutters and SFP4000etc. K L M Tungaloy L061