Large gantry polar coordinate CNC gear compound chamfering machine tool

Abstract

The invention discloses a large-size gantry polar coordinate numerical control gear compound chamfering machine tool. Based on a polar coordinate machining theory and a numerical control enveloping principle, compound chamfering of the end surfaces of the two sides of a tooth profile of an inner / outer straight / helical gear and simultaneous chamfering of the two sides in a tooth direction are realized by utilizing a hard alloy mill tool which rotates at a high speed; burs of tooth roots and edges and corners can be polished. The compound chamfering machine tool mainly comprises a machine tool body (1), an upright post (2), a cross beam (3), a rotary working table (14), an X1 axial and radial feeding system (4), an X2 axial and radial feeding system (11), a Z1 axial feeding system (6), a Z2 axial feeding system (8), a C shaft transmission worm gear pair (G5), a polishing wheel (SP4), a Z3 axial online probe system (18) and a chamfering main shaft system. The compound machine tool disclosed by the invention has the distinctive advantages that all chamfers in the tooth profile and the tooth direction can be completed by clamping a workpiece once; the sizes and the shapes of the chamfers are adjustable; the chamfer sizes are consistent; tooth grooves are centred automatically; the automation degree is high; the chamfering efficiency of a gear is improved.

Description

technical field [0001] The invention relates to a gear chamfering machine tool, especially a large-scale gantry polar coordinate CNC gear compound chamfering machine tool based on the principle of numerical control, which belongs to the disciplines and advanced manufacturing technologies of "Numerical Control Technology and Digital Manufacturing" and "Cutting Processing Technology and Equipment" field. technical background [0002] Gear chamfering is an important process before gear quenching heat treatment and finishing. It can remove burrs and sharp corners on the edge of gear teeth, effectively reduce quenching cracks, reduce stress concentration, reduce meshing noise of gears, and improve meshing quality and use of gears. life. [0003] For many years, the domestic gear industry has been using manual chamfering to chamfer the tooth profile and direction; however, with the continuous improvement of gear heat treatment and appearance requirements, many industries such as ...

AI Technical Summary

Problems solved by technology

At present, domestic chamfering machine tools mainly use the profiling method, which uses the direct contact between the profiling head and the tooth surface to control the chamfering tool to chamfer along the tooth profile. This method is simple in principle, but the profiling head is easy to wear and affects the machining accuracy. And it is easy to scratch the processed tooth surface. In addition, there are certain requirements for the pressure angle and root fillet of the gear, and it cannot meet the tooth chamfering

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