Please introduce a friend to the free CAD basic tutorial, thank you

You pull a lot of relevant information at once.

AutoCAD software is an automatic computer-aided design software produced by Autodesk in the United States, which can be used to draw two-dimensional drawings and basic three-dimensional designs, through which it can be automatically drawn without knowing how to program, so it is widely used in the world, and can be used in civil engineering, decoration, industrial drawing, engineering drawing, electronic industry, garment processing and other fields. Links contain various versions of AutoCAD software and related basic and advanced tutorials and materials, covering home improvement, architecture, engineering design and other directions.

There are **, 100% free, high-speed**, mold design**, CNC programming**, product design**, copper dismantling**, each software**tutorial has, absolutely free.

Moreover, especially for beginners, remember not to rush to learn CAD. Be sure to make a study plan first, and then work your way up from shallow to deep. Only in this way can you ensure the quality of your learning, so that you will not give up halfway or get twice the result with half the effort!

Let's start with the idea.

The key point of this question is to draw the irregular quadrilateral in the middle, the entry point is F, the distance between the center of the middle circle is 30, and the angle e is 90 degrees.

The left intersection point with the bottom edge is the point E, and the offset line and the left and right intersection points of the rectangle are drawn from the F point and the center of the circle respectively, and the rest is very simple.

It can be done with the constraints of CAD, and it can be calculated and then drawn.

The difficulty of the diagram lies in the positioning of the 8,20,7,12 scales above, although the oblique lines above have no angles, but they can still be drawn, and by observation, we find that the steps of the protrusions of the upper parts, that is, the steps with diagonal lines of 12 and 7, the two dimensions are the same.

Here's how:1Draw the part except the steps first, this should be no problem2

In the figure above, the parts in the dimensions of 12 and 3 are divided into two partsDraw a straight line with half of 20 straight lines, that is, 10 dimensions, at the end of the circle with a radius of 7, at the end of the circle with a radius of 12, draw a straight line with 8, so that it is equal to the line on the two circles, this is a step.

4.Mirroring is fine.

There is no angle between the top length 12 and 8, and there is no length of 90 degrees below. So there is no way to draw it.

If you can provide these two sizes, I can send you a picture.

Import the diagram into CAD and trace it inside!

Sketch out in CAD according to the dimensions, and then dimension.

Or use Better WMF's software to import CAD directly

It's too, use a red pen to mark the drawing, and then the drawing comes out, but you have to back one up first, otherwise there will be no data.

What do you mean? How do you draw it?

1.Make a cyan triangle, angle 90°, side, 2Make a yellow triangle, side 34 as an arc (circle), distance 28 parallel lines, 3

Make a magenta straight line, the straight line is perpendicular to the hypotenuse of the cyan triangle, and the right end of the hypotenuse of the cyan triangle is made 105 arcs (circles), and its intersection is an end point of the arc r25, 4As an arc of R25, a vertex of the yellow triangle is a starting point of the arc R25, with the starting point, endpoint, and radius.

5.Trim excess lines. To make a horizontal straight line, select all the diagrams, and align the two corresponding ends of the horizontal line with the two ends of the hypotenuse of the cyan triangle.

It's hard to find a master.,Your picture looks like the data is wrong.,Draw it down in turn.,It's not right when it's 105.。