| Kong Deshun(孔德顺)* **.[J].高技术通讯(英文),2020,26(2):217~223 |
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| Influence of velocity on the transmission precision of the ball screw mechanism |
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| DOI：doi：10.3772/j.issn.1006-6748.2020.02.012 |
| 中文关键词: |
| 英文关键词: ball screw mechanism (BSM), uniform motion, structural parameters, transmission precision |
| 基金项目: |
| Author Name | Affiliation | | Kong Deshun(孔德顺)* ** | (*Institute of Standard Metrology, China Academy of Railway Sciences Corporation Limted, Beijing 100081, P.R.China)
(**Beijing Huaheng Technology Co. Ltd., Beijing 100081, P.R.China) |
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| 中文摘要: |
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| 英文摘要: |
| Ball screw mechanism (BSM) is an important force-motion transfer device which is used in high-precision machine tools such as the computer numerical control. Performance parameters such as contact angle, helix angle, and the pitch radius of the screw can greatly affect the transmission precision, and the transmission precision of the BSM are not yet well resolved. In this study, ball contact point motion model is derived to assess the influence of contact angle, helix angle, and the pitch radius of the screw on transmission precision under uniform motion of the BSM. For the purpose of verifying the kinematic characteristics of the contact points between the balls and raceways under a state of uniform motion, a kinematic model is developed and values are computed for a set of boundary conditions. Comparing the simulated data to measured data, the laws of motion for the ball contact points developed in this study are confirmed. Moreover, the effect of the screw velocity on contact angle, helix angle and the pitch radius of the screw directly affects the velocity of the nut. Under the accelerated and uniform motion state of the screw, larger angular velocity of the screw results in an increase in the displacement deviation of the nut, and these parameters of the nut are considered to improve the transmission precision of the BSM. The verification of the research results provides a new research method for the study of the precision retention of ball screw mechanism. |
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