A Method of Improving the Precision of Helical Gear Slotting by Electronic Helical Guide

Abstract

The invention discloses a method for improving slotting precision of a helical gear through an electronic spiral guide rail. The method comprises the steps of firstly, calculating to obtain a theoretical main motion curve according to parameters of a machine tool; utilizing straight line sections to approach the theoretical main motion curve, so as to obtain a designed main motion curve; establishing a G code for trial cut according to maximum allowable step lengths obtained through calculation of all the sections of straight lines, corresponding crank rotation angles and gear parameters; carrying out trial cut on a processed gear for one time through the G code for trial cut, and measuring the deviation of a helical line; reversely calculating the deviation of the main motion curve according to the deviation of the helical line, so as to obtain a new theoretical main motion curve; utilizing straight line sections to approach the new theoretical main motion curve; establishing a G code for production according to the maximum allowable step lengths obtained through calculation of all the sections of straight lines, the corresponding crank rotation angles and the gear parameters; and utilizing the G code for production in gear processing. According to the method, the relatively precise G code for production can be obtained through only carrying out trial cut on the gear for one time, the cost is low, the reliability is good, and the operability is high.

Description

technical field [0001] The invention belongs to the field of numerical control machine tools and relates to the numerical control machining technology of internal helical gears, in particular to a method for improving the precision of helical gear slotting by electronic spiral guide rails. Background technique [0002] Ordinary domestic gear shaping machines usually use mechanical helical guide rails to cut helical gears. When processing helical gears with different helix angles, the helical guide rails must be replaced. Due to the high manufacturing cost, complicated processing technology and troublesome replacement of the helical guide rails, the processing internal The efficiency and machining accuracy of helical gears are difficult to meet the requirements, so the use of electronic helical guides instead of mechanical helical guides is of great significance for improving the processing efficiency and precision of internal helical gears and enhancing the flexibility of mac...

AI Technical Summary

Problems solved by technology

However, this scheme is affected by factors such as the length and initial position of the connecting rod, the clearance of the kinematic pair, the force deformation and wear of the rod, and there is a non-negligible difference between the actual main motion curve and the theoretical main motion curve.

Moreover, the variation law of the deviation of the main motion curve caused by this is relatively complicated, and it is very difficult to eliminate its influence by finding the law

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