Grinding tooth error modeling and compensation method facing grinding wheel dressing precision

Abstract

The invention discloses a grinding tooth error modeling and compensation method facing grinding wheel dressing precision. The method comprises the steps of firstly, establishing a geometric error-space error model of a grinding wheel dressing system based on the geometric errors of the grinding wheel dressing system and forward kinematics; secondly, considering the grinding wheel dressing envelopemotion and dressing contact conditions, constructing a grinding wheel dressing error model, and revealing a mapping rule of the geometric errors to the grinding wheel dressing precision; then, further establishing a grinding wheel dressing error-tooth surface error model based on the conjugate grinding principle, and quantitatively analyzing the influence of the various geometric errors of the grinding wheel dressing system on the grinding tooth accuracy; and finally, obtaining an explicit calculation expression of the actual movement instruction of a dressing shaft by using the ideal cutterposition data and the geometric errors of the dressing system, and realizing the grinding error compensation facing the grinding wheel dressing precision. The actual movement instruction solution of the dressing shaft can be calculated by using an off-line high-performance computer, so that the error compensation strategy has the advantages of universality, easiness in implementation and the like.

Description

technical field [0001] The invention relates to the technical field of error analysis and precision control of numerical control machine tools, in particular to a grinding gear error modeling and compensation method for grinding wheel dressing accuracy. Background technique [0002] Form grinding uses the outer surface of the grinding wheel for grinding and finishing. The CNC form grinding machine includes two subsystems, the grinding wheel dressing system composed of diamond roller-grinding wheel and the form grinding system composed of grinding wheel-gear blank. In the grinding wheel dressing system, due to the installation error of the grinding wheel and the diamond roller, and the installation error and motion error of the dressing axis, it is inevitable that there will be a deviation between the actual profile of the grinding wheel and the ideal profile, that is, the grinding wheel dressing error. Grinding wheel dressing error is an important source of forming grinding...

AI Technical Summary

Problems solved by technology

However, most of the existing studies only focus on the influence of a single or a few grinding wheel installation errors on the tooth profile accuracy of the grinding gear, and lack the geometric errors of other grinding wheel dressing systems, including diamond roller installation errors, dressing axis straightness errors, and dressing axis motion errors. , leading to comprehensive modeling of grinding wheel dressing errors, and naturally lacks modeling of grinding gear errors caused by these sources of grinding wheel dressing errors

That is to say, the existing grinding wheel dressing error model and gear grinding error model are not systematic enough to analyze the source of error, and cannot effectively quantify and analyze the influence of geometric errors of all grinding wheel dressing systems on gear grinding accuracy.

In addition, there is also a lack of gear grinding error compensation strategy for grinding wheel dressing accuracy

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