Каталог Dormer Pramet фрезерование 2021 - 2022 - страница 701

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9 DEFINITION OF BASIC TERMS Parts of an Indexable Insert Wiper edge Corner angle Main cutting edge Minor cutting edge Face Clamping hole Facet Flank Corner radius Flank facet Insert seating Geometry of milling tool Constructional angles determine the basic orientation of the seat Reducing the setting angle KAPR – kr at a constant feed fz causes position that the cutting insert is clamped in and are therefore im- a decrease in the chip thickness h. portant for the design of the milling cutter body. There are two an- • Rake angle of cutting edge LAMS – ls together with setting angle gles: axial face angle GAMP – gp (tool back rake) and radial face angle KAPR – kr and face angle GAMO – go, this determines the point GAMF – gf (tool side rake) – see picture below. of first contact between the edge and work piece. That is why it Working angles are the setting angle KAPR – kr, the orthogonal face affects the resistance of the edge to chipping during interrupted angle GAMO go and the rake angle of the cutting edge LAMS – ls. cut. At the same time, it affects the direction of chip evacuation. • Orthogonal face angle GAMO – go affects not only the extent of Working angles of the tool you can determine the bed using the for- plastic deformation of the cut chip but also the cutting force and mulas or diagrams below. temperature. The bigger the rake angle GAMO – go, the lower the cutting force and power demand of the spindle motor (and vice versa). • Setting angle KAPR – kr determines the thickness of the chip at a specific feed per tooth fz and axial depth of cut ap. It therefore affects cutting forces, specifically load, wear and tool service life. Working and constructional angles of milling tool B- B LAMO LAMS A-A A B C B C-C D A D C GAMP GAMF D-D 700 KAPR