How is a complete cad drawing drawn?

First, you have to install the design software. The CAD design software is best from AUTOCAD company. Now the highest version is 20 12. Buy a book that works well, just for a week. Then draw a picture frame in the software (that is, the outer frame of the drawing, where your drawing should be drawn to prepare for printing in the future, and it is also convenient to predict and know the size of your parts). A3=420*297 mm, A2 is twice its size (long side by side), A4 is its 1/2. You can also go to the bottom of the net or use the frame that comes with the software.

There should be a title bar in the drawing box. There should be the name of the designer and the name of the part, the material of the part, the treatment method, the quantity, the proportion and so on. Refer to the national standard of mechanical drawing in detail.

Then make a picture in the picture frame, according to the national or ISO standards. For example, thick solid lines are used for the outline of parts, imaginary thin lines are used for invisible lines, and thin solid lines are used for dimension line.

Finally, mark the size, fill in the title bar, check it, and OK.