崔怡 仲梁维



DOI:10.16660/j.cnki.1674-098x.2104-5640-6606
摘 要:工程图学课程最基本的教学任务是培养学生的工程图表达能力。随着机械三维CAD软件的几何建模被引入课程环节,工程图表达能力培养指导思想调整为从三维模型到二维工程图的表达。但学生很难综合应用各类表达方法和软件视图工具做出清楚、完整、规范的工程图。本文从主视图投影方向的选择、零件工程图表达一般原则、标准化和四大类零件表达方案推荐4个方面对这部分教学内容进行重新编排和深入挖掘,重新梳理的内容对提高学生从三维到二维的工程图表达能力有极大帮助。
关键词:工程图学 表达能力 三维模型 工程图
中图分类号:G642;TB23-4 文献标识码:A文章编号:1674-098X(2021)05(a)-0243-04
Teaching Discussion on the Engineering Drawing Expression of Mechanical Part Three-Dimensional Model
CUI Yi ZHONG Liangwei
(College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, 200093 China)
Abstract: The basic teaching task of engineering graphics course is to cultivate students' engineering drawing expression ability. With the introduction of geometric modeling of mechanical 3D CAD software into the course, the teaching ideas is transformed into drawing two-dimensional engineering drawing based on three-dimensional model. However, it is difficult for students to make clear, complete and standardized engineering drawings by using various expression methods and software view tools. This paper discusses this part of teaching content from four aspects including the choice of projection direction, general principles, standardization and recommended expression scheme of typical parts. This part of the content can improve students' engineering drawing expression ability from 3D to 2D.
Key Words: Engineering graphics; Expression ability; 3D model; Engineering drawing
三维建模技术在机械行业的广泛应用,从根本上改变了产品的设计环节,大幅度提升了新产品开发效率,节约了产品开发成本,因此,零件的三维模型成为了设计表达的重要载体之一。同时,传统二维图纸作为大家公认的设计信息的一种表达方式,从多个视图、多种方式在一张图纸上对设计做紧凑的、高效的表達,并在此基础上进行尺寸标注、技术要求标注,使其依然成为设计表达的重要载体。三维模型与二维工程图将在很长一段时间内共存。
工程图形表达能力从来就是工程图学课程最基本的教学要求之一。在现代三维设计手段发展的情况下,基于机械三维CAD软件的几何建模被引入课程或实践环节,因此在图形表达能力培养上,也形成了从三维到二维表达的局面,体现了图形表达能力培养上指导思想的调整。……