Generally divided into main view, top view and left view. In short, if you watch too much, you will turn back.
Practice makes perfect. Ask if you don't understand! You should read more legends, which will help you understand this view. You can't rush to look at the picture slowly. Holding the parts in front of the drawings can be done slowly, and it will be mastered in two or three days! Of course, we should also look at the theoretical basis of cartography! Distinguish the front view, top view and left view, and then understand the sectional view. Can be combined with physical reference, can cultivate their sense of space.
Find some complicated drawings. First of all, look at the object you can't understand. Look at all the lines. It is best to pay attention to some benchmarks from the direction of the title bar. I study mechanics, too. But I also think that it takes a lot of effort to understand the drawing information well. For example, there are many specific standards on it. I don't know what level of accumulation a novice needs to look at pictures. At different stages, different industries have different requirements [s: 1 1]. Theory plus practice has the best effect. For those who have not been exposed to mechanical drawing, it is best to practice drawing in combination with physical objects and ask the people around them about machinery.
Furthermore, learn more about the standards and methods of mechanical drawing, and it is best to actually draw the drawings you have seen.
This repetition and long-term accumulation will definitely improve.
Good luck! As a systematic study, we must first lay a good foundation. If the foundation is not well laid, it will be difficult to improve it in the future. Learn descriptive geometry first, and then look at some simple part drawings from shallow to deep! First of all, look at the picture number and name clearly and see your own understanding. Pictures are generally divided into three views (left view, top view, front view and sometimes cross section). When looking at a picture, first look at the front view, and then determine the object from the left view and the top view (some data are unified, learn to look at the corresponding relationship of the three views, and cultivate more three-dimensional sense)
Check the dimension relationship and check the dimension correspondence.
Three in each row try to correspond.
The three lines of each part correspond as much as possible.
The length, width and height of the three attempts correspond to the whole entity.
Only by practicing more can we understand the positional relationship between the three views well, and then associate them with the physical map.
Also pay attention to the plane lines. Lines with different angles represent different parts, so you should be able to distinguish them clearly.
Distinguish the front view, top view and left view, and then understand the sectional view. Can be combined with physical reference, can cultivate their sense of space.
Learn to see the correspondence between the three views and cultivate a three-dimensional sense.
Check the dimension relationship and check the dimension correspondence.
Three in each row try to correspond.
The three lines of each part correspond as much as possible.
The length, width and height of the three attempts correspond to each other, so it is suggested to buy a solid CAD textbook.
If you can draw some pictures by hand, draw them yourself.
When looking at pictures, try to understand what each line in each picture means.
Just look at some more pictures.
See the direction of the view clearly, such as front view, left view, top view, right view, bottom view, back view, etc. Read more books in full, half, partial and directional parts. If you look at it in combination with the perspective view, you should first look at the front view, top view and left view in combination with three directions, and you can refer to it in combination with the real thing. Practice makes perfect! Premise: Have a certain descriptive geometry foundation, otherwise you can only know you by pictures, but you don't know pictures.
1. Look at the title bar first to find out what kind of parts (shaft sleeve, disk cover, fork frame or shell) are represented in the drawing, what material is it, what is the drawing scale, whether it is a casting, etc.
2. Starting from the front view, check whether the expression used in each view is an outline view or a section view. If it is a sectional view, where is the cutting position? 3. Understand the main points expressed by each viewpoint.
For example, the front view adopts full section, that is to say, the key point is to express the internal structure; A local section is used in the top view to express the internal structure and local appearance that are not reflected in other views.
4. Combined with dimensioning, the parts shown in the drawing are wrongly divided into several basic shapes (cylinder, cone, sphere, plane solid) or several parts.
Find out the shape and size of each basic body, find out the combination form between basic bodies, and combine them to think of the overall shape.
5. When looking at drawings, several views need to be linked, and a single view cannot fully express the structure of parts.
6. Read more parts drawings, think more about space shapes and communicate more.
First look at the front view, establish the basic model, and then use the projection relationship between views to find the detailed features and practice more.
It can be combined with physical reference, pay attention to dimension marking, and very much agree with the view of 3 1 building. I majored in marketing. I have worked in a chemical machinery factory for half a year, and I can basically read drawings.
I think practice makes perfect, because I found that our vice president looks at the drawings very well, but he just graduated from primary school! I just learned 1. I used to be taught by a teacher, but now I have to rely on myself.
Thank you for giving me so much valuable advice.
Have you studied mechanical drawing?
If you have learned it, it should be very beautiful. If you haven't learned it, you'll be in trouble. Theory plus practice, alignment, flatness, width should have a sense of space. Of course, it has to be simple before complicated. Don't try to eat a big fat man. That's just the opposite. You can't get used to it. You can read everyone's opinions perfectly. I learned a lot. I'm a novice, too. I should have a strong three-dimensional sense in hard training. Think more about three-dimensional modeling according to the drawings.
Look at more pictures. Practice makes perfect.
Understanding drawings is only one aspect, but also the meaning of symbols. Just look at the drawings. Practice makes perfect, practice hard.
In the lower right corner of the drawing frame, the general standard drawing will include material name, product or process, proportion, surface treatment, tolerance requirements, designer, reviewer, projection method, etc.
2
Looking at the views of products, general cartographers will divide products into several views: top view, bottom view, front view, back view, left view, right view, auxiliary view, enlarged view, global sectional view and partial sectional view.
The number of views depends on the requirements of the product.
The placement of the view depends on the drawing method of the view.
Generally, the third angle drawing method is adopted, because it is easier to understand and read the products on the drawings.
three
Look at the size and tolerance of the product. Tolerance is often used in mechanical, electronic, chemical, physical and other fields.
Tolerance control is directly related to product quality and production level.
Mechanical drawing is a subject that accurately expresses the structural shape, size, working principle and technical requirements of machinery with drawings.
Drawings are composed of figures, symbols, words and numbers. They are technical documents that express design intentions and manufacturing requirements and exchange experiences. They are often called the language of engineering.
Patterns generally need to be depicted as transparent base maps, and blueprints are developed with transparent base maps or purple pictures are smoked with ammonia water.
In the mid-20th century, an electrostatic copier appeared, which can directly copy the original image, enlarge or reduce it.
By adopting this new technology, the tracking process can be omitted.
There is no shortcut, just look more. If you are interested, you will soon understand. There should be a three-dimensional model of the back of your head.
What needs to be understood slowly cannot be understood at once. I feel that it is more important to look at the drawings, and it is best to learn quickly by looking at them.