随着模型定义(model based definition,MBD)技术的发展,传统二维环境下的机加工工艺已无法满足企业要求,提出一种新的三维机加工工艺方法。通过工艺模型动态构建、工艺信息标识及标注、工艺规程设计和三维工艺输出及管理实现了基于三维...随着模型定义(model based definition,MBD)技术的发展,传统二维环境下的机加工工艺已无法满足企业要求,提出一种新的三维机加工工艺方法。通过工艺模型动态构建、工艺信息标识及标注、工艺规程设计和三维工艺输出及管理实现了基于三维模型的工艺设计;通过可视化发布、车间工艺推送等技术实现"三维模型下车间";同时使得设计、工艺、制造使用相同的数据源,突破设计、工艺、制造之间的信息不统一问题。实例分析结果证明:该方法有利于提高工艺设计的效率和准确性,具有可行性和有效性。展开更多
随着三维CAD的深化应用和基于模型的定义(model based defi nition,MBD)技术的发展,传统二维环境下的机加工工艺已无法满足企业智能化的要求.针对此问题,在分析三维机加工工艺设计特点的基础上,提出了基于Pro/E模型的三维机加工工艺设...随着三维CAD的深化应用和基于模型的定义(model based defi nition,MBD)技术的发展,传统二维环境下的机加工工艺已无法满足企业智能化的要求.针对此问题,在分析三维机加工工艺设计特点的基础上,提出了基于Pro/E模型的三维机加工工艺设计方法及实施技术途径,并以调距桨产品活塞杆零件为例验证了该方法的可行性和有效性.展开更多
Optical flow method is one of the most important methods of analyzing motion images. Optical flow field is used to analyze characteristics of motion objects. According to motion features of micro-electronic mechani-ca...Optical flow method is one of the most important methods of analyzing motion images. Optical flow field is used to analyze characteristics of motion objects. According to motion features of micro-electronic mechani-cal system (MEMS) micro-structure, the optical algorithm based on label field and neighborhood optimization is presented to analyze the in-plane micro-motion of micro-structure. Firstly, high speed motion states for each fre-quency segment of micro-structure in cyclic motion are frozen based on stroboscopic principle. Thus a series of dynamic images of micro-structure are obtained. Secondly, the presented optical algorithm is used to analyze the image sequences, and can obtain reliable and precise optical field and reduce computing time. As micro-resonator of testing object, the phase-amplitude curve of micro-structure is derived. Experimental results indicate that the meas-urement precision of the presented algorithm is high, and measurement repeatability reaches 40 nm under the same experiment condition.展开更多
文摘随着模型定义(model based definition,MBD)技术的发展,传统二维环境下的机加工工艺已无法满足企业要求,提出一种新的三维机加工工艺方法。通过工艺模型动态构建、工艺信息标识及标注、工艺规程设计和三维工艺输出及管理实现了基于三维模型的工艺设计;通过可视化发布、车间工艺推送等技术实现"三维模型下车间";同时使得设计、工艺、制造使用相同的数据源,突破设计、工艺、制造之间的信息不统一问题。实例分析结果证明:该方法有利于提高工艺设计的效率和准确性,具有可行性和有效性。
文摘随着三维CAD的深化应用和基于模型的定义(model based defi nition,MBD)技术的发展,传统二维环境下的机加工工艺已无法满足企业智能化的要求.针对此问题,在分析三维机加工工艺设计特点的基础上,提出了基于Pro/E模型的三维机加工工艺设计方法及实施技术途径,并以调距桨产品活塞杆零件为例验证了该方法的可行性和有效性.
基金Supported by Youth Natural Science Foundation of Beijing University of Chemical Technology (No.QN0734).
文摘Optical flow method is one of the most important methods of analyzing motion images. Optical flow field is used to analyze characteristics of motion objects. According to motion features of micro-electronic mechani-cal system (MEMS) micro-structure, the optical algorithm based on label field and neighborhood optimization is presented to analyze the in-plane micro-motion of micro-structure. Firstly, high speed motion states for each fre-quency segment of micro-structure in cyclic motion are frozen based on stroboscopic principle. Thus a series of dynamic images of micro-structure are obtained. Secondly, the presented optical algorithm is used to analyze the image sequences, and can obtain reliable and precise optical field and reduce computing time. As micro-resonator of testing object, the phase-amplitude curve of micro-structure is derived. Experimental results indicate that the meas-urement precision of the presented algorithm is high, and measurement repeatability reaches 40 nm under the same experiment condition.
