Общий каталог Sumitomo 2019 - 2020 - страница 332

Grooving Tools Principal Force Principal Force SEC-Grooving Tools GND Type Key Points for Facing Holder Selection Precautions for Groove Expansion Recommended Chipbreakers MG ML GG GL GF GA Min. bore diameter Max. bore diameter 1 2 3 F Min. bore diameter· Select a holder with which the outer diameter of the first groove 45 to be machined is between the maximum and minimum grooving diameters of the holder. · If the first groove is within the effective work diameter range · If the machining start point is within the effective work diameter during groove expansion via plunging, the work diameter will not range, the work diameter will not be limited for subsequent passes. be limited for subsequent passes. Precautions for Traverse Cutting  Recommended Chipbreakers MG ML RN Considering the rigidity of the holder, we recommend machining from the outside to the inside. External → Internal Internal → External Feed Direction Feed Direction Cutting Point Cutting Point If machining is performed from the inner to the outer diameter, the wall thickness remaining on the principal force side will become thinner, reducing the rigidity of the holder. · If the machining start point for traverse face cutting operation is within the effective work diameter range, the work diameter will not be limited for subsequent passes. · Select the lower limit of the recommended cutting conditions for the chipbreaker and lengthen the chips for evacuation. (In face grooving, broken chips easily get stuck in grooves, which causes problems.) · When breaking chips, step feed is required. Key Points in Internal Diameter Machining Precautions for Internal Diameter Machining  Recommended Chipbreakers ML GL GF If the prepared hole diameter is small, use an ML type or GL type low-feed chipbreaker, both of which reduce chip curl diameter, to ensure adequate chip evacuation. MG ML GG GL GCMN3004-MG GCMN3002-ML GCMN3002-GG GCMN3002-GL Work Material: SCM415 Prepared Hole Diameter: ø25mm Holder: GNDI R2532-T306 Insert: GCM N300○-○○ Cutting Conditions: vc = 100m/min, f = 0.1mm/rev, ap = 3.0mm Wet Internal Diameter Machining External Machining GG GG Chip shapes differ between internal and external machining even under the same cutting conditions. Work Material: SCM415 Holder: GNDL R2525M-320, Insert: GCM N3002-GG GCMN3002-GG Cutting Conditions: vc = 100m/min, f = 0.10mm/rev, ap = 5.0mm Wet F18