Abstract: In the classroom teaching of mechanical design, students have blind spots in understanding two-dimensional engineering drawings and space construction when teaching complex shapes of workpiece. In addition, a few teachers have problems in teaching methods, teaching AIDS, which are not conducive to better teaching. To solve these problems, this paper presents the applications of 3D printing technology to mechanical three-dimensional entity teaching experiment, through the "one learn two do three print" teaching method, make students better grasp the complicated workpieces drawing and characteristic, make the students master parts design main point, and mastering the core content of the course, the purpose of teaching.

Key words: 3D printing, Machinery manufacturing, Mechanical courses