Chip-breaking process of gears which are milled with helical tool with cutters shaped like the tooth space. Beskrivning The process The workpiece is fixed on a vertical rotating axis and the cutting tool on a horizontally rotating axis. The rotation of these axes are coordinated so that the workpiece periphery is fed at the same rate as the motion of the cutting inserts helical form. The workpiece is usually rotated several turns to create full teeth. The angle between these shafts is adjusted depending on the angle of the gears desired. Gear hobbing Process films Advantages and disadvantages In comparison with alternative methods Quick process Continuous process Simultaneous processing of multiple gear blanks no overheating of the tool Tight tolerances Smooth surface Not suitable for producing internal teeth
