Application method of the thermal error-temperature loop in the spindle of a CNC machine tool

US11009857B2 · kind B2 · utility

Assignee

• Dalian University of Technology · CN

Inventors

• Kuo Liu · Dalian, CN
• Haibo Liu · 东风镇, CN
• Te LI · 东风镇, CN
• Haining Liu · Irvine, US
• Yongqing Wang · 东风镇, CN
• Zhenyuan JIA · 东风镇, CN

Key dates

• Filing date: Aug 30, 2018
• Grant date: May 18, 2021
• Expiry date: Mar 7, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B2219/49209
• WIPO field: Control
• WIPO sector: Instruments

Abstract

An application method of the thermal error-temperature loop in the spindle of a CNC machine tool. This uses a bar and two displacement sensors to determine radial thermal errors of the spindle. Meanwhile two temperature sensors are used to determine the temperature of the upper and lower surfaces of the spindle box. Then, the thermal error-temperature loop is drawn with the temperature difference between two temperature sensors as the abscissa and the radial thermal error of the spindle as the ordinate. Finally, the loop is employed to analyze the mechanism of the radial thermal deformation of the spindle and the thermal error level is evaluated. Since the method is based on measured data, the results of the analysis are closer to the reality, compared to those from the numerical simulations.