The Thermal Error Characteristic Analysis and Thermal Error Modeling Compensation of Aspheric Grinder

Abstract

According to the literature analysis, the thermal error of CNC machine tools is the main factor affecting its processing accuracy, accounting for about 40% -70% ; This paper discusses the structure assembly of Aspherical Grinder, which is the research carrier of thermal error analysis of NC machine tool, and analyzes the characteristics and concrete forms of thermal error in aspherical grinder Based on the multi-input and single-output characteristics of the multi-linear regression model in the statistical theory, a multi-linear regression method is proposed to realize the thermal error modeling of aspheric grinder, the thermal error model of aspherical grinder is constructed based on matrix calculation, and the thermal error compensation system is designed in practice, the results show that the thermal error model of aspherical grinder based on the multiple linear regression theory can effectively compensate the thermal error of aspherical grinder and calculate the compensation data, the residual error after compensation has been reduced to 4.216E -002, greatly improving the aspheric surface grinder processing accuracy, making it meet the aspheric surface precision grinding processing needs.