摘要
针对数控加工中心中存在影响加工精度的几何误差问题,进行了空间几何误差场建模分析并设计了一种通用的空间误差场仿真分析软件。首先,基于多体系统理论对几何误差元素进行了分析,根据加工中心拓扑结构建立了空间误差场模型,模型与加工中心的工件链和刀具链中的运动轴类型和位置密切相关。为了方便分析不同类型加工中心的误差场,基于Visual Studio平台设计了三轴数控加工中心通用的空间误差场仿真软件,可实现加工中心误差场的可视化,同时可针对工件的加工代码生成补偿后加工代码,有利于加工中心的结构设计和后续误差补偿。最后将误差场仿真软件应用到Carver800T型立式加工中心。结合测量得到的误差项数据对加工中心工作空间误差场进行分析,得到工作空间误差分布曲线以及整个工作空间的误差场分布,同时得到工件补偿加工代码,为该加工中心的精度提高和误差补偿提供了依据。
For the geometric error elements of three-axis CNC machining center which greatly affect the machining precision, the spatial geometric error fields were analyzed, and the universe simulation software of error fields was developed. Firstly, error elements were analyzed based on multi-body theory; the spatial geometric error fields of machining center were modeled according to the topological structure of the machining center. It can be seen that the models of spatial geometric error fields were closely relative to the types and the positions of axes in the working piece chain and tool chain of the machining center. The models were different for machine centers with different topological structures. Then, the simulation software of error fields for universe three-axis CNC machining centers was developed due to the modeling process using Visual Studio platform in order to conveniently analyze the different machining centers. The software can realize the visualization of error fields and -enerate the compensated machining code based on the nominal code. It can give help for the structural design and error compensation of machining centers. Finally, the simulation software was applied to Carver800T vertical machining center. The error fields of this center were analyzed with all measured geometric error data to obtain the error distribution curve and the whole error fields of the machine tool. The compensated machining code was also obtained based on the nominal code of workpiece and the error fields of this machine center. It
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2016年第4期382-390,共9页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金项目(51175461)
国家自然科学基金创新研究群体科学基金项目(51221004)
浙江省科技厅公益性应用研究计划项目(2014C31089)
浙江省教育厅科研项目(Y201327389)
关键词
数控加工中心
拓扑结构
空间误差场建模
仿真软件
CNC machining center
topological structure
modeling of spatial error fields
simulation software
