What are the prerequisites for learning CAD?

My experience is similar to yours, I studied AutoCAD mechanical drawing 2004 in February this year, I basically don't know how to read drawings, but in the process of my study, I found that CAD is just an auxiliary tool, it contains a wide range, and it does not necessarily have to be mechanical drawing. After 2 months of study, I have mastered the various operations of CAD in general, and I have made my own works according to the requirements. The effect is not bad.

Right now, I'm looking at the signs about mechanical drawing, etc., and I'm feeling better and better day by day.

I can do it, and you can do it! It's not very difficult to learn boldly!

You need to know what you do when you learn CAD! He's there to help with drawing!

What do you want to do with CAD?

If you're using it for graphic design! Then it means that you are in the industry now!

It shows that you already have a certain understanding of diagrams! Just don't worry!

If you just want to learn CAD, it doesn't matter!

Actually, there is nothing about software! As long as you want to learn to draw more, you will.

Let's put it this way, I'll tell you some basic things, you can use it in 30 minutes, but you can't create value, if you want to use CAD to make a living, then you have to learn to read pictures

Buy the book "Mechanical Drawing" on it.

Oh, you won't look at a three-dimensional drawing to draw a projection map of all sides, it's useless to learn, if you want to learn CAD, you have to understand mechanical drawing, otherwise it's difficult to learn, even if you learn, people give you something to use CAD to draw the projection of each side, you don't know how to draw mechanical drawing.

No, as long as you know how to use a computer, you will definitely learn it

1. CAD is computer-aided design. Since you are designing with a computer, the basic computer usage foundation is a necessary skill.

3. Design foundation. Due to the high cost of engineering construction facilities, it is impossible for Luchang to test and lay out the final effect scene with real objects in reality, so it is necessary to use the computer to express human creativity on the computer in a three-dimensional way according to the actual scene data, so as to facilitate everyone to communicate and establish the clearability of the final plan, so there is a computer-aided cavity design technology.

4. Know how to quickly hand-draw performance. In this way, when the customer puts forward the demand, it can be quickly expressed with hand-drawn sketches, which is convenient for the customer to communicate with the customer on-site to understand their real needs, which can not only improve work efficiency and reduce unnecessary trouble in CAD design, but also understand the customer's needs thoroughly and save the construction cycle.

Summary. Learn the basic operations of the computer: including how to open the software, create a file, save a file, save it as, and more.

Master the basic knowledge of 2D geometry: CAD is a professional drawing software, and you need to master a certain knowledge of 2D geometry when drawing, including how to draw straight lines, circles, arcs and other basic graphics. Familiarity with three-dimensional space:

CAD involves not only two-dimensional graphics, but also many three-dimensional graphics, so it is necessary to be familiar with the concept of three-dimensional space. Understand the basic operation of CAD software: Different CAD software has different operation interfaces, and you need to master the basic operation methods of CAD software, including how to select, move, scale, rotate, and layout.

Have certain aesthetic ability and drawing skills: Although CAD software drawing relies on computer aid, the final design result requires certain aesthetic ability and proficient drawing skills.

Learn the basic operations of the computer: including how to open the software, create a file, save a file, save it as, and more. Basic knowledge of 2D geometry:

CAD is a professional drawing software, which requires a certain knowledge of 2D geometry when drawing, including how to draw basic graphics such as straight lines, circles, and arcs. Familiar with three-dimensional space: CAD involves graphics that are not only limited to two-dimensional graphics, but also many three-dimensional graphics production, so it is necessary to be familiar with the concept of three-dimensional space.

Understand the basic operation of CAD software: Different CAD software has different operation interfaces, and pure staring needs to master the basic operation methods of CAD software, including how to select, move, scale, rotate, layout, etc. Have a certain aesthetic ability to do digging and drawing skills:

Although CAD software drawing relies on computer aid, the final design result requires certain aesthetic ability and skilled drawing skills.

Learning CAD is a systematic learning process, which requires comprehensive knowledge of parts in parts, assembly, drawing, basic mathematics, engineering analysis and other aspects. Beginners should start from the basics, combined with practical applications, and master them step by step.

The foundation is very important, step by step, practice makes perfect.

First, the foundation is very important

Practice has proved that the "manual drawing board" drawing ability is the basis of computer drawing ability, learning "AutoCAD", need a certain amount of drawing geometry knowledge and ability, need a certain ability to recognize the map, especially the ability to make geometric drawing, generally speaking, people with a high level of manual drawing, it is easier to learn, the effect is better.

Second, step by step

The whole learning process should be done in a step-by-step way, first understand the basic knowledge of computer graphics, such as relative Cartesian coordinates and relative polar coordinates, so that you can master the use of AutoCAD technology from shallow to deep, from simple to complex.

3. Apply what you have learned

When learning AutoCAD commands, always combine them with practical application, and don't spend the main energy on learning each command in isolation; The principle of applying what you have learned runs through the whole learning process, so that you have a deep and vivid understanding of drawing commands, which is conducive to cultivating your ability to use AutoCAD to complete drawings independently.

Fourth, practice makes perfect

You should force yourself to make a few comprehensive examples, and draw the graph in detail, so that you can grasp the whole drawing process from a global perspective.

We first need to prepare the paper required for drawing, A0 to A4 paper size is decreasing in turn, the drawing can be divided into whether there is a gutter, the frame is left with a gutter general binding edge of 25mm, and the other three times are equal to the distance between the boundary lines.

The whole paper can be divided into two areas: the drawing area, the title bar; The title box should be placed at the bottom right of the drawing, providing a true description of the drawing and indicating the author information.

The font used in the drawing is different from the font used in ordinary times, which is divided into straight (that is, the font we usually use for writing) and italic (the sesame oil is inclined and 75 degrees to the horizontal line).

The font size is divided into: a

B font, type A font width is one-fourteenth of the height, type B font stroke width is one-tenth of the character height, the same pattern uses the same font.

For the use of various graphics, we must fully understand the characteristics of his graphics, so as to clearly reflect the structural characteristics of the physical object (note: the gap between the two parallel lines shall not be less than, when drawing a circular center line, the intersection of the center of the circle must be the intersection of solid lines; The center line less than 12mm can be replaced by a solid line instead of a double-dotted line; There should be a gap where the thick and thin solid lines meet.

There are two unique nouns that need to be understood and are often encountered in drawing operations.

Slope: tana=h l taper refers to the ratio of the diameter of the bottom circle of the cone to the height, if it is a cone, the difference between the upper and lower bottoms is the height of the upper and lower bottoms, that is, the taper = d l = d

d l = 2tana step reading.

You don't need any foundation, the key is to have the determination to learn it well. Have a goal. What is the use of you learning CAD. How it helps you. Only when you understand these things can you have the motivation to learn. In order to solve problems encountered in the process of learning, they can solve them excitely.

CAD is not difficult, it is easy to learn. CAD is just a tool, it's not difficult to use a tool, it's what is difficult is what you draw. So, learn CAD to know what you're doing with CAD, draw those things, and then learn the relevant knowledge together.