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Research on Thermal Errors of High Speed Motorized Spindle of 5-Axis CNC Machine Tools

Author: WangZiCheng
Tutor: ZhangChaoHui
School: Beijing Jiaotong University
Course: Mechanical Design and Theory
Keywords: High-speed spindle Thermal error Modeling Multi-body system Homogeneous transformation matrix Error compensation
CLC: TG659
Type: Master's thesis
Year: 2009
Downloads: 423
Quote: 3
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Abstract


In practical application process , the heating of the high-speed spindle axis CNC machining accuracy , it is largely restricted to the improvement of machining accuracy . Some data indicate that the error can be caused by fever accounted for 70% of all errors . Therefore , we must take effective measures to improve the accuracy of machine tools to analyze and reduce the thermal error . Based on this need , the thermal error of five-axis CNC machine tool spindle speed as the main object , the establishment of the spindle thermal error model provides a basis to guide the production practice , enabling effective thermal error on CNC machine tools predict , control, and compensation, in order to improve the machining accuracy of the workpiece . The main work of this paper is summarized as follows: (1 ) the use of the basic theory of heat transfer , the establishment of high-speed spindle spindle thermal error model , and derive the thermal error of the spindle axis . (2 ) XH714-5X five-axis NC machine tool for the study, the use of multi-body system theory to simplify the complex structure of the five-axis CNC machine tools . ( 3 ) the use of robotics in the homogeneous transformation matrix and the differential motion analysis method , error analysis of five-axis CNC machine tools , drawn between the five thermal error of the spindle and CNC machine tool axes of motion compensation amount relationship . ( 4) the use of a differential capacitive sensor to measure the amount of thermal error compensation , and in the course of on-site processing speed electric spindle thermal error compensation solutions.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal cutting and machine tools > Program control machine tools, CNC machine tools and machining
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