【摘要】 针对工程图学课程教学,从工程应用角度介绍了产品定义技术所经历的3个阶段,即二维设计二维出图、三维设计二维出图和全三维数字化定义,引出基于模型技术的起源与应用发展。结合波音787飞机模型解析了基于模型定义数据集的组成和表达形式。引用航空标准中几何尺寸与公差标注方法,以圆柱面为例,探讨了与基于模型定义技术相融合的工程图学课程教学案例,对比分析了二维工程图和三维基于模型定义数据集的表达内容、表达形式和优缺点。与基于模型定义技术相融合的工程图学课程教学,一方面可以增加课堂信息量、拓宽学生的知识面,强化学生的工程基础,为后续专业课程学习和实际应用打下良好基础;另一方面也可以激发学生的学习兴趣和科研兴趣,形成科研与教学之间的良性互动。更多还原

【Abstract】 Aiming at the teaching of engineering graphics, the present study introduces the three development stages of product definition technology from the perspective of engineering application, including two-dimensional design and two-dimensional drawing release, three-dimensional design and two-dimensional drawing release, and fully three-dimensional digital definition. The origin and application development of model-based definition technology are also introduced elaborated in this paper. The content and expression method of model-based definition dataset are introduced and analyzed by using Boeing 787 aircraft model. Referring to the geometric dimension and tolerance annotation method of aviation standard, taking cylindrical surface as an example, we discussed the teaching case of engineering graphics course integrated with model-based definition technology. The expressive content and method, advantages and disadvantages between two-dimensional engineering drawings and fully three-dimensional model-based definition dataset are compared and analyzed. Engineering graphics course integrated with model-based definition technology can not only increase the amount of classroom information, but also broaden the students’ knowledge and provide a good foundation for the following professional courses and practical application. In addition, it can stimulates the student’s interest in learning and scientific research, and promote the good interaction between scientific research and teaching.更多还原