基于MBD的三维CAD模型信息标注研究
发布时间：2018-09-12 06:35
【摘要】：数字化设计是机械设计与制造领域的一项关键环节,对整个机械制造业的发展具有重要的意义。现代航空航天等机械制造领域为了缩短产品生产周期,降低生产成本,提高产品质量,逐渐引进了MBD(Model Based Definition)数字化技术,3DMBD数字化设计技术的发展是一次质的飞跃。随着MBD技术的发展,三维CAD标注模型越来越受到重视,尤其是基于MBD的三维CAD系统的应用直接促使了工业时代又进入了新的领域。本文针对目前基于MBD三维CAD模型关于标注信息方面中存在的瓶颈问题,研究了零件的三维CAD模型信息标注与管理方法,从而完成对零件产品的全面数字化定义。研究内容主要包括以下几方面:(1)研究了基于MBD在三维CAD模型上利用PMI(Product Manufacturing Information)功能进行信息标注的方法。对三维CAD零件模型的几何尺寸、表面结构、公差、技术要求等方面进行了标注,在此基础上也提出了二维图纸继承相应视图的PMI三维标注的实现方法。(2)基于UG/PMI功能标注的方法,根据国家最新标准设计出了表面粗糙度、几何公差标注的新方法。解决了PMI自带辅助标注工具的不足,便于用户更快速、更高效的对三维CAD零件模型进行标注。(3)本文提出了三维CAD零件模型标注信息按“组”和“视图”两种方式进行有效组织和管理的新方法。解决了三维零件由于非几何信息标注的繁多导致显示效果呈现凌乱的现象,使信息表达不清楚,造成机加过程中信息难以识别等问题。
[Abstract]:Digital design is a key link in the field of mechanical design and manufacturing, and it is of great significance to the development of the whole mechanical manufacturing industry. With the development of MBD technology, more and more attention has been paid to 3D CAD annotation model. Especially, the application of MBD-based 3D CAD system has directly promoted the industrial age to enter a new field. In this paper, the method of information labeling and management for 3D CAD model of parts is studied, so as to complete the complete digital definition of parts. The research contents mainly include the following aspects: (1) The method of information labeling based on MBD on 3D CAD model using PMI (Product Manufacturing Information) function is studied. On the basis of this, a new method of PMI 3D marking based on UG/PMI function is proposed. (2) According to the latest national standard, a new method of surface roughness and geometric tolerance marking is designed. (3) A new method of effective organization and management of 3D CAD part model annotation information by "group" and "view" is proposed in this paper, which solves the problem of 3D part annotation caused by non-geometric information. The display effect is cluttered, which makes the information expression unclear and makes it difficult to identify the information in the machining process.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH122;TH16
[Abstract]:Digital design is a key link in the field of mechanical design and manufacturing, and it is of great significance to the development of the whole mechanical manufacturing industry. With the development of MBD technology, more and more attention has been paid to 3D CAD annotation model. Especially, the application of MBD-based 3D CAD system has directly promoted the industrial age to enter a new field. In this paper, the method of information labeling and management for 3D CAD model of parts is studied, so as to complete the complete digital definition of parts. The research contents mainly include the following aspects: (1) The method of information labeling based on MBD on 3D CAD model using PMI (Product Manufacturing Information) function is studied. On the basis of this, a new method of PMI 3D marking based on UG/PMI function is proposed. (2) According to the latest national standard, a new method of surface roughness and geometric tolerance marking is designed. (3) A new method of effective organization and management of 3D CAD part model annotation information by "group" and "view" is proposed in this paper, which solves the problem of 3D part annotation caused by non-geometric information. The display effect is cluttered, which makes the information expression unclear and makes it difficult to identify the information in the machining process.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH122;TH16
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