High speed milling and turning/turn broaching/turning and turn broaching

A method of cutting machining a workrpiece with rotationally symmetric surfaces, comprising the steps of:

• a first cutting machining operation in which a first cutting speed is produced primarily by rotation of the workpiece;
• and
• a second cutting machining operation in which a second cutting speed is produced primarily by rotation of a tool;
• wherein the workpiece is a crankshaft having an end flange and an end journal, and at least one of the end flange and the end journal is also machined within a same working procedure without removal from a machine which implements machining of remaining regions of the workpiece;
• wherein when the crankshaft is held between two points a central bearing is cutting machined by means of at least one of turning and rotational broaching and turning-rotational broaching at a periphery of the central bearing;
• wherein additional support for the crankshaft is effected at the machined central bearing and wherein cutting machining of at least one of the end flange and the end journal is effected at least at peripheral surfaces thereof by at least one of turn and rotational broaching and turning-rotational broaching,
• clamping of the crankshaft is effected at the machined peripheral surfaces of the end flange and the end journal;
• machining of the central bearings at least at the peripheral surface is effected by at least one of turning and rotational broaching and turning-rotational broaching, and
• machining of crank throw bearings at least at one of the periphery and crank side cheek end faces is effected by at least one of external milling and rotary milling.