It is required to be able to draw the bracket and box parts by hand, and do the following:

(1) Drawing surface: a3;

(2) Proportion: determined according to national standards;

(3) Line drawing shall conform to national standards;

(4) the layout should be unified, the drawings should be neat, and the fonts should be neat;

(5) Parts must be expressed completely, clearly and correctly;

(6) Dimensions shall be complete, correct, clear and basically reasonable;

(7) Dimensional tolerance, form and position tolerance and roughness shall be correctly marked (note that the latest national standard GB/T131-2006 shall be adopted for roughness marking).

2. Understand the working drawing of parts and draw the working drawing of parts with AutoCAD.

Requirements can use AutoCAD to draw bracket and box parts, and master the following related knowledge:

(1) Draw the drawing frame and title bar; Draw straight lines and curves; Curve editing; Text annotation.

(2) Layer setting; Engineering marking; Call icon; Attribute query.

(3) making and calling building blocks; The use of galleries; Attribute modification.

3. Three-dimensional digital modeling

(1) sketch design

Skills in sketch design are required. (specifically: sketch drawing; Sketch constraint; Sketch editing; Display control)

(2) Feature modeling

It is required to master the basic steps of parametric feature modeling and the skills of editing three-dimensional entities. (including: definition and drawing of basic voxels; Operation of basic functions and auxiliary functions; Operation of Boolean operation; Feature editing)

(3) Surface modeling

It is required to master the generation methods of various three-dimensional surfaces. (Specifically, it includes: establishing a basic surface; Establishing a free-form surface; Surface editing)

(4) Assembly modeling

It is required to master the method of assembling an assembly from three-dimensional entities by using various assembly constraints, as well as the expression methods such as cutting and explosion. (including: basic assembly constraint method; Expressions such as cutting and explosion of assembly. )

(5) Generation of engineering drawings

It is required to master the method of generating two-dimensional engineering drawings from three-dimensional models and edit the engineering drawings to make them conform to national standards. (Specifically, it includes: setting the drawing environment of engineering drawings; Generating two-dimensional engineering drawings according to three-dimensional models).

(6) model rendering

It is required to master the rendering skills of 3D models (including rendering settings and model rendering).