| KONG Deshun(孔德顺)* **,GAO Xiangsheng*** ****,JIANG Huizeng* **.[J].高技术通讯(英文),2023,29(3):247~256 |
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| Research and experimental analysis of precision degradation method based on the ball screw mechanism |
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| DOI：10. 3772 / j. issn. 1006-6748. 2023. 03. 003 |
| 中文关键词: |
| 英文关键词: ball screw mechanism (BSM),fractal theory,wear model,accelerated degradation method,friction torque,precision retention |
| 基金项目: |
| Author Name | Affiliation | | KONG Deshun(孔德顺)* ** | (*Institute of Standard Metrology,China Academy of Railway Sciences Corporation Limited,Beijing 100081,P. R. China)
(**Beijing Huaheng Technology Co. Ltd. ,Beijing 100081,P. R. China)
(***Key Laboratory of Advanced Manufacturing Technology,Beijing University of Technology,Beijing 100124,P. R. China)
(****Hebei Changxiang Rubber Plastic Technology Co. Ltd. ,Hengshui 053500,P. R. China) | | GAO Xiangsheng*** **** | | | JIANG Huizeng* ** | |
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| 中文摘要: |
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| 英文摘要: |
| As a key transmission component in computer numerical control (CNC) machine tools,the ball screw mechanism (BSM) is usually investigated under working load conditions. Its accuracy degradation process is relatively long,which is not conducive to the design and development of new products.In this paper,the normal wear depth of the BSM nut raceway is calculated under the variable speed operation condition using the fractal wear analysis method and the BSM's accelerated degradation proportional wear model. Parameters of the acceleration degradation model of the double-nut preloaded ball screw pair are calculated based on the physical simulation results. The accelerated degradation test platform of the BSM is designed and manufactured to calculate the raceway wear model when the lubrication condition is broken under the variable-speed inertial load and the boundary lubrication condition under the uniform speed state. Three load forces and two samples are selected for the accelerated degradation test of the BSM. The measured friction torque of the BSM is employed as the evaluation index of the accuracy degradation test. In addition,the life cycle of the accuracy retention is accurately calculated by employing the parameters of the physical simulation model of the BSM. The calculations mentioned above can be used to estimate BSM's accuracy performance degradation law under normal operating conditions. The application of the proposed model provides a new research method for researching the precision retention of the BSM. |
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