Page 7 - Iscar_Article_Brochure
P. 7

allows considerable increases in feeds and
        speeds per tooth (fz) due to the effect of
        chip thinning.


        This advantageous geometry minimizes the radial
        effect of the cutting force and maximizes its axial
        influence, resulting in forces that act towards the
        spindle axis, i.e. the direction of maximum machine
        tool rigidity. The result - improved milling stability,
        reduced vibrations, prolonged tool life, reduced
        power  consumption and increased productivity.


        Although FF strategies began in the area of
        indexable milling, it soon extended to solid
        carbide endmills and became popular in the
        global die and mold making industry due to its
        efficiency when machining complicated shapes
        and cavities, especially of small sizes.
        Due to diverse and frequent changing working
        programs, their fast low-power machining
        centers and advanced CAD/CAM software,
        die and mold producers quickly saw the value
        of the new strategy.


        Although carbide endmills were the most
        commonly used cutting tool, FF milling cutters
        of relatively small diameters were also very
        popular prior to the introduction of the new
        strategy. Subsequently, the FF approach came
        into fast feed facing (“triple F”) and opened the
        way to the development of various indexable
        face milling cutters. Now, given the amount of
        face milling that takes place in this major global
        area, general engineering is the main consumer
        of these tools.


        Fast Feed Milling Cutters
        These milling cutters are a key factor in fast
        feed milling techniques. The cutter geometry,
        designed for efficient chip thinning, needs to
        ensure correct distribution of the cutting force
        components. There are two principal geometrical
        approaches. The first design requires the cutting
        edge of an FF milling cutter to be an arc of a
        great circle. Another concept is based on using
        one or two straight edges that are chords of the
        arc. In both cases, the small cutting edge angle



                                                                                            7
   2   3   4   5   6   7   8   9   10   11   12