Advanced CAD exercises (I)

Use today CAD Dream of drawing a CAD Advanced exercises .

Target graphics

Operating tools

operating system ：Windows10

CAD Software ：CAD Dream drawing

step

1. First, draw two long lines 50 Horizontal straight line and length 95 Guides of vertical lines （ Here, helper objects are displayed in white , The actual object is displayed in cyan ）, As shown in the figure ：

Linear auxiliary line

2. Draw two radii with the two endpoints of a horizontal line as the center of the circle 25 The circle of , As shown in the figure below ：

Draw the radius 25 round

3. Then draw a radius of 75 The circle of , As shown in the figure below ：

Draw the radius 75 The circle of

4. Then draw a radius of 50 The circle of , As shown in the figure below ：

Draw a radius of 50 The circle of

5. With radius 75 Sum radius 50 Draw a radius of 75 The circle of , As shown in the figure below ：

Draw the radius again as 75 The circle of

6. Then we delete the auxiliary circle （ Off-white ） Re trim objects , The effect is shown below ：

Delete objects and trim objects

7. We choose the remaining arc to mirror with the vertical line as the mirror base , Then trim the small circle , The effect is shown in the figure ：

Mirror arc

8. Box all objects , Use the zoom command （SC） Take the lowest point of the object as the zoom base point , The midpoint of a vertical line is the scaling scale for scaling replication , The effect is shown below ：

Scale the copied object

9. Finally, delete the auxiliary line and mark it , As shown in the figure ：

Finish drawing