项目名称: 复杂空间型面误差在机测评及反馈补偿原理与方法
项目编号: No.51275348
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 机械、仪表工业
项目作者: 何改云
作者单位: 天津大学
项目金额: 80万元
中文摘要: 加工质量信息的表达、获取、传递和利用是数字化制造的重要内容。项目对在机检测环境下复杂空间型面公差定义、误差测评理论及反馈补偿方法等关键问题进行研究。用数学方法对型面几何误差进行描述、定义和建模,基于广义曲面几何误差评定拓扑学模型,给出复杂空间型面误差评定自适应格式的构造方法。使用多元非线性回归分析等统计学工具,研究基于3D几何模型的复杂空间型面采样智能规划及有关离散数据获取策略的若干问题,实现高效、准确地获得被测型面的结构参数信息。建立系统动误差综合模型,研究动、静误差分步补偿策略及基于刀位数据修正和工艺CAD模型重构相结合的误差补偿方法。最后,以项目的理论研究成果为核心内容,构建复杂空间型面误差在机测评与反馈补偿系统,并在实验平台上实现复杂空间型面典型零件的"设计-加工-测量-补偿加工"一体化的质量控制过程。这将为我国高性能复杂机械装备核心制造技术的突破提供理论支撑。
中文关键词: 误差补偿;在机检测;曲面重构;采样规划;
英文摘要: The expression、acquisition、transmission and utilization of processing quality information are the important contents of digital manufacturing. In this project,the tolerance definition、error evaluation theory and feedback compensation method of the complex spatial profile are mainly studied based on on-machine verification environment. Firstly, the mathematical method is utilized to describe、define and model the geometric error of the profile. And based on the topological model of the geometric error evaluation of the generalized profile, the construction method of adaptive error evaluation for complex spatial profile is proposed. Secondly, using the multiple non-linear regression analysis etc., the intelligent sampling planning and discrete data obtaining method aiming at 3D geometric model are studied, which realizes an efficient and accurate acquisition of structure parameters. Then, the comprehensive dynamic error model of system is modeled. A step-by-step compensation strategy for dynamic and static error is proposed and the compensation method based on cutter location data modification and process CAD model reconstruction is analyzed. Finally, using the theoretical research results, a system used for error evaluating and feedback compensating of complex spatial profile is constructed, realizing the "design-
英文关键词: error compensation;on-machine verification;surface reconstruction;sampling planning;