1. There are many ways to create 3d models through cad. Here, take the rotation method to create a 3d model as an example. Open cad, switch the view to 3D view, draw basic graphics and rotate coordinate axes.

2. Then in the "Modeling" function, select the rotation method, as shown in the figure.

3. After setting the rotation, open and select the 2D graphic to be rotated, as shown.

4. Then set the rotation axis. Here, take the drawn line as the rotation axis, and follow the prompts in the command window at the bottom.

5, then set the rotation mode, and the angle of 360 degrees is displayed here, as shown in the figure.

6. Finally, create a 3d model. If you want to observe the 3D effect of the model, you can switch the viewing mode intuitively.