机械制图教学具有抽象性强、技术性强、实践性强的特点,以上的特点导致很多高职学生不能高效地学习机械制图相关的知识。三维CAD是一种能在计算机上绘制3D图形的软件,高职教师可应用这一技术提高机械制图教学的效率。一、应用三维CAD技术的直观性教学抽象性太强是高职学生学习机械制图的第一个障碍。比如高职教师引导学生学习减速器装配图时,很多学生只能从抽象的词汇来理解教师所说的意思。即使高职 Mechanical drawing teaching is abstract, technical and practical characteristics, the above characteristics lead to many vocational students can not effectively learn mechanical drawing related knowledge. Three-dimensional CAD is a software that can draw 3D graphics on a computer. Higher vocational teachers can apply this technology to improve the efficiency of mechanical drawing teaching. First, the application of three-dimensional CAD technology intuitive teaching Abstract too strong is the first obstacle for vocational students to learn mechanical drawing. Such as vocational teachers to guide students to learn retarder assembly drawings, many students only from the abstract vocabulary to understand the meaning of the teacher said. Even higher vocational