摘要：At present many CAD software products did not fully meet the requirements of National Standard 《Technical drafting and mechanical drawing》 that greatly affects the quality and speed of engineering design. Taking computer-aided design of typical mechanical parts as an example, this paper proposes an approach to develop corresponding functions in CAD software to enhance the standardization of engineering design.

摘要：In order to improve the shaping design ability of students in mechanical drawing, it is necessary to introduce and analyze the shaping design of parts and some typical shaping method. Firstly, shaping designs of different structures of some parts such as installation part, connection part and so on are introduced, and then the shaping design procedure of the base of reducer is analyzed. Secondly, some typical shaping design methods such as shaping design based on the deformation of the basic body, profile design shaping design, complementary shaping design, equal volume shaping design, variation shaping design and combinatorial shaping design are introduced and analyzed. Finally, the design model of various pipe joints used in the exhibition hall is given as a design question. It will be helpful to improve the spatial imagination and shaping ability of students.

摘要：In order to overcome many problems and shortcomings of our three-dimensional design education in mechanical drawing, make the students master the modem design method and technology easily, modem modeling method and shaping method are introduced, and the shaping designing methods of assembled-body are analyzed including basic requirements for shaping design, common principles of shaping and shaping design method. It will be helpful to improve the spatial imagination and modelling ability of student.