摘要
成都飞机工业集团提出的S试件是针对五轴数控加工中心的动态加工精度而设计标准试件,并且该试件在机床的验收工作中取得了良好效果,但S试件的各项误差与机床各单项性能指标对应的映射关系尚无法精确建立,为研究机床各轴刚度特性对S试件轮廓误差的影响,文中建立了机床各轴的动力学模型,并基于多体空间理论建立了五轴机床的运动学模型,结合仿真加工的G代码和机床原始误差得到了S试件的轮廓误差模型,通过实际加工验证了模型的正确性,并在此基础上研究了各轴刚度对S试件轮廓误差的影响,为优化机床刚度性能提供了理论基础。
The S test piece proposed by Chengdu Aircraft Industry Group is a standard test piece designed for the dynamic machining accuracy of a five-axis CNC machining center, and the test piece has achieved good results in the acceptance work of the machine tool. The mapping relationship between the error and each individual performance index of the machine tool cannot be accurately established. In order to study the influence of the stiffness characteristics of each axis of the machine tool on the contour error of the S specimen, this paper establishes the dynamic model of each axis of the machine tool, and establishes the kinematics model of the five-axis machine tool based on the multi-body space theory.Combining the G code obtained by simulation and the original error of the machine tool, the contour error model of the S specimen is obtained. The correctness of the model is verified through actual processing, and the influence of the stiffness of each axis on the contour error of the S specimen is studied on this basis. It provides a theoretical basis for optimizing the rigidity performance of the machine tool.
作者
史凤梁
陈秀梅
杨庆东
SHI Fengliang;CHEN Xiumei;YANG Qingdong(School of Mechanical and Electrical Engineering,Beijing Information Science&Technology University,Beijing 100192,China)
出处
《机械工程师》
2022年第1期4-8,共5页
Mechanical Engineer
基金
北京市科技计划项目(Z191100002019004)
北京市教委科技计划一般项目(KM202011232012)。
关键词
五轴机床
S试件
轮廓误差
各轴刚度
five-axis machine tool
S test piece
contour error
stiffness of each axis