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Research Status of Hydrostatic Bearing Technology in Machine Tool

Author(s):

Xiaodong Yu*, Weicheng Gao, Guangpeng Wu, Wenkai Zhou, Hongwei Bi, Yu Wang, Junfeng Wang and Jianhua Jiao  

Abstract:


Background: As the basis of mechanical manufacturing, large-scale machine tools are developing in the direction of improving processing accuracy, load-bearing capacity and rigidity. Hydrostatic thrust bearing, hydrostatic guide and hydrostatic ram are important components of large machine tools, with the continuous improvement of product accuracy requirements, the research on hydrostatic thrust bearing, hydrostatic guide and hydrostatic ram are more important.

Objective: This paper introduces the current research on hydrostatic thrust bearing, hydrostatic guide and hydrostatic ram to express the importance of hydrostatic ram in improving the machining accuracy of machine tools. The study aims to lay a foundation for research and development of hydrostatic ram in the future.

Methods: Firstly, the hydrostatic bearing technology is introduced. Secondly, the research status of hydrostatic thrust bearing, hydrostatic guide and hydrostatic ram are introduced to provide theoretical basis for improving the processing performance of rest ram.

Result: Deformation compensation and thermal deformation compensation of hydrostatic ram have been studied more. Most of study focus on the accuracy of hydrostatic ram, but less on the bearing performance of hydrostatic ram.

Conclusion: Breakthroughs have been made in the research on precision control and structural form of the hydrostatic bearing at home and abroad. Most scholars take the ram of Computer Numerically Control (CNC) boring and milling machines as the research object, but there are less research on the ram of vertical lathes. Therefore, the academic circle should pay more attention to the bearing performance of the hydrostatic ram of vertical lathes.

Keywords:

Tribology characteristics, friction pair deformation, hydrostatic thrust bearing, hydrostatic guide, hydrostatic ram, large machine tool.

Affiliation:

Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, Key Laboratory of Advanced Manufacturing and Intelligent Technology, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, Qiqihar Heavy CNC Equipment Corp. LTD., Qiqihar 161005, Qiqihar Heavy CNC Equipment Corp. LTD., Qiqihar 161005



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