A New Turning Method of Cylindrical Internal Gear

Abstract

A new type of cylindrical internal gear turning method, including circumferential NC forming and radial NC forming, which is realized by the linkage between a linear cutting axis Z-axis parallel to the workpiece axis and the rotary servo axis B-axis of the workpiece. By changing the linear axis Z-axis Positioning distance, complete the circular NC forming when rotating the workpiece, realize the circular feed through the relative position of the Z-axis linear motion, in the plane multi-point NC forming, the helix of each single point processing and the indexing between each tooth It is realized by a servo rotating axis B axis, and at the same time, the material removal in the tooth width direction is completed; the radial axis X axis of the workpiece completes the radial numerical control forming of the plane multi-point numerical control forming method by numerical control, and the circumferential numerical control forming Z axis and radial The multi-point compound motion of the X-axis of CNC forming forms a plane involute. The invention is suitable for processing the involute internal teeth with small diameter, large modulus, and large helix angle. During processing, only a numerical control lathe and the processing program provided by the method are needed, and the processing efficiency is high, and the cost of machine tools and cutting tools is low.

Description

technical field [0001] The invention relates to a novel cylindrical internal gear turning method, which is especially suitable for machining involute internal gears with small diameter, large modulus, and large helix angle. During processing, only a numerical control lathe and the processing program provided by the method are required, and the processing efficiency is high. Low machine and tool costs. Background technique [0002] It can be seen from the mechanical principle and gear processing technology and principle that the involute of the internal gear tooth is an expansion curve in the base circle, and the fan Cheng method gear grinding process with high machining accuracy cannot be used to manufacture the internal gear teeth. At the same time, if the normally meshed external gear is used as the rolling gear, the existing rolling equipment cannot control the deformation uniformity of the tooth surface of the internal gear and the backlash of the meshing gear pair, so t...

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Problems solved by technology

[0002] It can be seen from the mechanical principle and gear processing technology and principle that the involute of the internal gear tooth is an expansion curve in the base circle, and the fan Cheng method gear grinding process with high machining accuracy cannot be used to manufacture the internal gear teeth

At the same time, if the normally meshed external gear is used as the rolling gear, the existing rolling equipment cannot control the deformation uniformity of the tooth surface of the internal gear and the backlash of the meshing gear pair, so that the meshing accuracy required by the internal gear cannot be achieved. Has not been successfully implemented in internal gear tooth machining

[0003] In the prior art, internal gears are usually processed by forming methods such as gear shaping, tooth drawing, and forming milling. However, the manufacturing precision of the internal gear teeth processed by the above methods is low, generally not exceeding 7 grades, resulting in gears inside Vibration, noise, additional dynamic load, etc. are generated in the meshing transmission, which reduces the bearing capacity, life and reliability of the gear, and cannot meet the requirements of high-end equipment for precise transmission

[0004] At present, there are certain difficulties in the processing of involute internal teeth with small diameter, large modulus, and large helix angle. The use of gear shaper machining requires a special spiral guide rail, and the small-diameter tool sleeve cannot bear the load of the large-modulus gear. cutting force

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