The Spindle Axial Time-Varying Thermal Error Compensation Method for Horizontal Boring and Milling Machine Tool Based on Edge Computing

Abstract The time-varying thermal error of Horizontal Boring and Milling Machine Tool (HBMMT) directly affects the manufacturing performance of high-end parts. The time-varying thermal error is in axial direction due to the radial symmetry of spindle box is good. The spindle axial time-varying thermal error compensation method based on edge computing was studied for reducing the effect of spindle axial time-varying thermal error of HBMMT on the consistency of machining accuracy of parts. The spindle axial time-varying thermal error model was established based on the speed and acceleration of spindle temperature change. The spindle axial time-varying error compensation value was acquired by the edge computing, and the error was compensated based on the principle of coordinate origin offset. The error fluctuation range with compensation was reduced by 87.7%, and the accuracy stability of HBMMT was greatly improved.