Sheet metal parts are generally widely used in industries such as electromechanical, light industry, and automotive parts.

The traditional production methods of the past have become increasingly unsuitable for modern design requirements due to their long cycles, low efficiency, and poor quality. In order to overcome these drawbacks, people have begun to use advanced CAD systems. Drawing with CAD on microcomputers is both simple and intuitive, and has great effects and significance.

Sheet metal parts can generally be divided into three categories:

1. Flat panel: Refers to general flat punching and shearing parts.

2. Bending type: CAD expands the designed graphics before bending and welding.

3. Forming type: Regular or free-form surface parts processed by stretching and other forming methods. These parts are all processed from flat blanks through stamping methods such as punching and deformation, and they have significant differences from parts processed by general machining methods. In stamping processing, bending deformation is the main processing method that causes complex spatial positional relationships in sheet metal parts.