The Innovative Research Of Engineering Drawing Expressions Based On Expression Method

In the form of expressions to express and describe the shape, size and location coordinates of the engineering drawings is a new idea and method on the description and expression of the graphics, it is a convenient way to represent,describe,input and output of the graphs, and the preparation of the corresponding drawing software. According to the parameter technology and parametric drawing principles, this paper has studied the expression representation method of drawings, the structure and content of graphic expression, defined the structure and content of the graphic expressions, established the classified lists of standardized graph elements and standardized sub-graphs, as well as the editing characters, and also developed the corresponding rules of the preparation of graphic expressions, given a sample of a typical engineering drawing with the expression representation method of drawings, and achieved the graph display of the sample on the preparation of the software.