Inductive hardening of pinion teeth

摘要

The method comprises: clamping (S1) a gearwheel blank in a workholder of a multi-axis machine tool; clamping (S2) a milling head in a tool holder of the multi-axis machine tool; rotating the tool holder by a spindle drive to enable the milling head to mill out tooth spaces of the gearwheel blank to create a gearwheel having teeth; replacing the milling head in the tool holder by an inductor; inserting (S7) an inductor between two adjacent teeth of the gearwheel; and supplying the inductor with an alternating current from a current supply device of the drive to heat the two adjacent teeth. The method comprises: clamping (S1) a gearwheel blank in a workholder of a multi-axis machine tool; clamping (S2) a milling head in a tool holder of the multi-axis machine tool; rotating the tool holder by a spindle drive to enable the milling head to mill out tooth spaces of the gearwheel blank to create a gearwheel having teeth; replacing the milling head in the tool holder by an inductor; inserting (S7) an inductor between two adjacent teeth of the gearwheel; supplying the inductor with an alternating current from a current supply device of the spindle drive to inductively heat the two adjacent teeth; replacing the inductor in the tool holder by a machining tool; and remachining the teeth of the gearwheel by the machining tool. The multi-axis machine tool is designed as five-axis machine tool. The method further comprises: actively cooling an inductively heated tooth by a cooling medium after termination of inductive heating; transferring the inductor during active cooling of the inductively heated tooth for insertion between two other adjacent teeth of the gearwheel for inductively heating the two other adjacent teeth; predefining a frequency of the alternating current to the current supply device of the spindle drive by a control device of the multi-axis machine tool; transforming downward an alternating voltage by a transformer before supplying the inductor; and supplying the inductor with single-phase or three-phase alternating current. The alternating current has a frequency of 5-40 kHz. A transformer ratio of the transformer is 5:1-20:1.