东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (6): 834-838.DOI: 10.12068/j.issn.1005-3026.2017.06.015

• 机械工程 • 上一篇    下一篇

动力伺服刀架端齿盘分度精度可靠性灵敏度设计

王新刚1， 常苗鑫1， 张恒1， 吕春梅2   

  1. (1. 东北大学 机械动力学与可靠性研究中心， 河北 秦皇岛066004； 2. 东北大学 机械工程及自动化学院， 辽宁 沈阳110819)
  • 收稿日期:2016-01-25 修回日期:2016-01-25 出版日期:2017-06-15 发布日期:2017-06-11
  • 通讯作者: 王新刚
  • 作者简介:王新刚(1979- )， 男，黑龙江齐齐哈尔人，东北大学副教授，博士.
  • 基金资助:
    国家自然科学基金资助项目(51475086)； 辽宁省自然科学基金资助项目(2014020026)； 河北省自然科学基金资助项目 ( E2015501073)； 中央高校基本科研业务费专项资金资助项目(N152304004).

Reliability and Sensitivity Design for Indexing Accuracy of End-toothed Disc of Power Servo Turret

WANG Xin-gang1， CHANG Miao-xin1， ZHANG Heng1， LYU Chun-mei2   

  1. 1. Research Center of Mechanical Kinetics and Reliability， Northeastern University， Qinhuangdao 066004， China; 2. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China.
  • Received:2016-01-25 Revised:2016-01-25 Online:2017-06-15 Published:2017-06-11
  • Contact: WANG Xin-gang
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摘要： 端齿盘加工精度的高低会直接影响到整个刀架的分度精度.在对端齿盘加工误差进行分析的基础上建立了端齿盘的分度误差模型，利用二阶矩和摄动方法求出端齿盘的可靠性指标，并计算出其可靠度.以端齿盘的分度误差模型为基础，将可靠性理论与灵敏度分析方法相结合，给出了动力伺服刀架端齿盘分度精度可靠性灵敏度设计的分析方法.通过算例得出了端齿盘各随机参数的可靠性灵敏度变化规律，并分析了各随机参数的变化对端齿盘分度精度可靠性的影响.研究表明，端齿盘各设计参数的改变对其可靠性的敏感程度不一，可通过优化敏感参数来提高齿盘的分度精度可靠性.同时为提高刀架系统的分度精度可靠性提供理论依据.

关键词: 分度端齿盘, 加工误差, 分度精度, 可靠性, 灵敏度

Abstract: The level of end-toothed disc accuracy has a direct effect on the indexing accuracy of the turret. The indexing error model of turret is proposed based on the analysis of end-toothed disc machining error and then the reliability index and reliability of end-toothed disc are obtained by using the second-order moment method and perturbation method. Using the indexing error model of end-toothed disc， and combing the reliability design theory with sensitivity analysis method， an analytical method for reliability and sensitivity design about end-toothed disc of power servo turret is proposed. The change rule of reliability and sensitivity about the random variable of end-toothed disc is given according to the example， and the effect on the indexing accuracy reliability of end-toothed disc is analyzed when the random variable of end-toothed disc changed. The study shows that， due to the different sensitive degree of design parameters to the indexing accuracy reliability， the sensitive parameters should be optimized so as to improve reliability of the end-toothed disc. Meanwhile， the as-proposed method may provide a theoretical basis for enhancing the reliability of the turret.

Key words: indexing end-toothed disc, machining error, indexing accuracy, reliability, sensitivity

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