Analyzing the Effects of Lubrication Techniques on CNC Spindle Bearing Heat: An Experimental Investigation

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-10-13 DOI:10.48084/etasr.6146

Duc-Do Le, Tuan-Anh Bui

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Abstract

The machining ability and accuracy of a machine are determined by parameters such as the stiffness and load capacity of its spindle unit. In addition, the effectiveness and technique of lubrication and cooling can significantly affect the operational characteristics of the machine spindle. The current study investigated the effects of two different lubrication methods, grease and air-oil mixture, on the temperature which is generated at the spindle bearings of a Computer Numerical Control (CNC) machine. The temperature distribution and rise rate of the bearings were measured using a thermal imaging camera and thermocouples. The results indicated that the air-oil mixture method was more effective in dissipating heat and reducing the temperature of the bearings than the grease method, due to the direct cooling provided by the air-oil mixture to the bearing balls, resulting in improved lubrication efficiency and heat exchange with the environment. Compared to the grease lubrication method, the temperature of the bearings was lower by 7°C to 9°C depending on the position of the bearing on the CNC spindle. Therefore, it is recommended to use the air-oil mixture lubrication method, especially for high-speed processing on CNC machines. However, the discharge of oil particles from the ventilation system should be carefully controlled. Overall, the findings offer valuable insights into optimizing lubrication methods for CNC machines to enhance processing quality and reduce the impact of temperature on the bearing performance.

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润滑技术对数控主轴轴承热影响的实验研究

机床的加工能力和精度是由机床主轴单元的刚度和承载能力等参数决定的。此外，润滑和冷却的有效性和技术对机床主轴的运行特性有很大的影响。本文研究了润滑脂和混合油两种不同的润滑方式对数控机床主轴轴承产生的温度的影响。利用热像仪和热电偶测量了轴承的温度分布和上升速率。结果表明，空气-油混合物方法在散热和降低轴承温度方面比油脂方法更有效，因为空气-油混合物向轴承球提供了直接冷却，从而提高了润滑效率和与环境的热交换。与油脂润滑方法相比，根据轴承在数控主轴上的位置，轴承的温度降低了7°C至9°C。因此，建议使用气油混合润滑方法，特别是在数控机床上进行高速加工。但是，应从通风系统中仔细控制油颗粒的排放。总的来说，这些发现为优化数控机床的润滑方法提供了有价值的见解，以提高加工质量并减少温度对轴承性能的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.