Modeling and Analysis of Key Geometric Error for Gravity Deformation of Heavy-Duty CNC Machine Tool

• Published in: Applied Mechanics and Materials Vol. 552; no. Process Equipment, Mechatronics Engineering and Material Science II; pp. 90 - 95
• Main Authors: Fu, Hong Ya, Han, Zhen Yu, Wang, Han
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.06.2014
• Subjects: Accuracy; Computer numerical control; Error analysis; Errors; Gravitation; Machine tools; Mathematical models; CNC Machine Tool; Analysis; Geometric Error Modeling
• ISBN: 9783038351030; 3038351032
• ISSN: 1660-9336; 1662-7482; 1662-7482
• DOI: 10.4028/www.scientific.net/AMM.552.90

Gravity has huge impact on the accuracy of heavy-duty machine tools. To investigate errors caused by gravity, it is essential to figure out the most influential factor. This paper presents a geometric error modeling for heavy-duty CNC machine tools. Regarding a machine tool as a rigid multi-body system (MBS), the geometric error model has been established by utilizing kinematics chain and homogeneous transfer matrix (HTM). By analyzing the Jacobi matrix, the influence of all the geometric error parameters has been calculated to find out the key geometric error that affect the accuracy most. It is revealed that gravity of beam and tool affect the accuracy of the machine tool most through the ANSYS simulation. It supports a theoretical basis for the further research on error compensation of the key component of a machine tool.