摘要
为了提高数控机床的机械加工性能,针对双蜗杆蜗轮传动的数控转台,在分析影响其啮合侧隙的几何与物理因素如中心距误差、中间平面误差、轴交角误差及载荷的基础上,基于多体动力学理论和接触碰撞理论建立双蜗杆机构虚拟样机模型,并在ADAMS中进行了仿真分析。为了进一步研究上述4种因素在不同变化范围的水平下对传动精度影响的大小,假定4种因素为正态分布且相互独立,利用Monte Carlo抽样仿真的方法对机构传动可靠性进行分析,从而确定主要影响因素。该方法为数控转台传动机构的优化设计提供了参考。
To improve the machining performance of Numerical Control （NC） machine tool, aiming at the NC rotary table of double worm and worm gear, the geometrical and physical influence factors on meshing backlash such as center distance error, midplane error, middle shaft angle error and load were analyzed. The mechanism virtual pro totype model of double worm was established based on multibody dynamics theory and contact impact theory, and the simulation analysis was given in ADAMS. To research the influence of above four factors on transmission accu racy under different changes range, the Monte Carlo method was used to analyze the mechanism reliability by assum ing that four factors for normal distribution and mutual independent. Thus the main influence factor was confirmed, and the reference for optimization design of NC rotary table＇s mechanism transmission was provided.
出处
《计算机集成制造系统》
EI
CSCD
北大核心
2014年第1期148-154,共7页
Computer Integrated Manufacturing Systems
基金
国家科技重大专项资助项目(2012ZX04002-041)~~
关键词
数控机床
数控转台
多体动力学
啮合侧隙
传动精度
MONTE
Carlo仿真
numerical control machine tool
numerical control rotary table
multi-body dynamics
meshing backlash
transmission accuracy
Monte Carlo simulation
