Four-shaft numerically controlled ellipsoidal and spherical hobbing cutter spade milling machine tool

Abstract

The invention discloses a 4-axis nc relief grinding machine tool for ellipsoidal and spherical hobs, which is characterized in that: a machine bed(3) is provided with an arc adjusting plate(11) whose position can be adjusted and a rotary plate(19) that can rotate around a rotary shaft(18) fixed on the arc adjusting plate(11).The rotary plate(19) is sequentially provided with a radial feeding knife frame(22), a tangential feeding knife frame(15) and a cutter from the lower part to the higher part. The rotary shaft (18) is perpendicular to the central lines of a spindle box (1) and a tailstock (2). An arc rolling guiding rail (23) is arranged between the rotary plate (19) and the arc adjusting plate (11). The lower parts of the radial feeding knife frame (22) and the tangential feeding knife frame (15) are respectively provided with a straight line rolling guiding rail (21). With the proposal adopted, the special machine tool for processing spherical and ellipsoidal internal gear hobs is provided, which solves the problems that the cutters of large diameters are difficult to be processed with difficult processing and low precision.

Description

Technical field [0001] The invention relates to a four-axis numerically controlled ellipsoidal and spherical hob grinding machine tool, in particular to a machine tool for processing ellipsoidal and spherical internal gear hobs. technical background [0002] Gear shaping is currently the most commonly used method for machining internal gears based on the generative principle. The spherical hob is designed based on the principle of machining internal gears with a gear shaper. It is a generative tool. One hob can process large internal gears with the same modulus but different numbers of teeth. The hob is The tooth profile of the machined workpiece after the regrind of the shovel tooth structure is unchanged, and it has the advantages of high machining accuracy, long service life and good versatility. The spherical hob is the most ideal tool among the large internal gear hobbing tools at present. However, there is no special machine tool for processing spherical or ellipsoidal heli...

AI Technical Summary

Problems solved by technology

Because the position of the center of rotation of the shovel tooth lathe tool holder is fixed and cannot be moved, it just intersects perpendicularly to the center line of the machine tool spindle, so only spherical hobs can be processed

At the same time, ordinary shovel tooth lathes are completely mechanically driven, and cannot be corrected when the normal pitch of the hob is out of tolerance

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