关键词: 尺寸工程, 尺寸管理, 公差管理, 公差分析与优化, 产品设计

Abstract: To improve the quality and efficiency of product design,the recent progress of dimensional engineering was represented,which included its concept,process,tools and its roles in the product development process in detail.The weaknesses in the implementation of dimensional engineering were pointed out.Through the integration of digital matching and sealing technology,3D modeling software and Product Data Management (PDM) system and the dimensional tolerance analysis software,the consistency of the information flow was realized,and a unified dimension information processing platform was formed.The guidelines for the research on a new 3D tolerance analysis model and the theory oriented to product life cycle were proposed,and the popularization of dimensional engineering in all manufacturing industry was to be expected.

Key words: dimensional engineering, dimensional management, tolerance management, tolerance analysis and optimization, product design