Mechanical design is often inseparable from our own experience, and the accumulation of experience can certainly learn a lot from books.
It's hard to leave a deep impression in my mind, and I don't have a certain foundation for other people's experiences.
Understanding absorption is really not easy. Ha ha.
Mechanical design runs through the whole process of design, manufacture, use and maintenance, and negligence always exists in design.
Reflected, success is easy to judge. In the process of design, it is greatly influenced by manufacturing.
Good design is inseparable from manufacturing. The more you know about manufacturing, the more helpful it is to improve the design level. design
In production, I haven't seen many that can be processed and assembled immediately according to the drawings, but I found many in the process of drawing review and technology.
It is very common, including the so-called "senior" senior engineer, the drawings produced by the chief engineer, or after many meetings and studies.
There are many reasons for this result, such as the standardization of drawing and the level of viewers.
Lack of in-depth understanding of manufacturing process is the main reason. How to judge your manufacturing knowledge? most
The way is to grab a drawing of something you designed. Can you tell me the whole process of its manufacture? Casting,
Clamping, milling, planing, grinding, that's it, definitely not. Everyone who has worked in a machinery factory for several years doesn't know.
If you divide it down, you should have a comprehensive understanding of each process. For example, how to split the mold when casting, how to put the gate and riser,
What kind of casting defects appear, and will the structure of the parts lead to unexpected situations during heat treatment?
Optimize the structure of parts, visualize the cutting process in your mind, and always use several knives.
The number of knives, even where the iron filings fly, the order of use of each knife, and the operation of turning, milling and grinding workers.
Cheng, etc., are all good foundations. It's not that designers will definitely play with lathes.
It is possible to burn electric welding, but you should know these operating characteristics and take them into full consideration when designing.
Only in this way can a skilled person be better than a person who burns electric welding on a rocking bed and have a foothold. In this way, in the design process
Avoiding some unreasonable structures will naturally improve the quality of design, but it is not enough. A mechanic with more than 18 years' experience can come up with more mature details than you (although they can't do the overall design)
How many sleepless nights have designed such a result, is it impolite to sweep the floor? The only solution
Read a book. What others sum up is usually combined with production and is the crystallization of painstaking efforts. With problem learning,
Digestion. Never say "as long as the concentricity is guaranteed". The point is that you have
The method of proving concentricity, even the mistakes of predecessors. At this time, no one will call you Penny, Xiao Zhao or Lian.
You, Qian Gong and Zhao Gong are all highly respected. Touch the chin, the beard is long, the diaper is lost, and the child is crying.
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Hehe, the sense of accomplishment is coming. But design is always used, and a good design must have a little bit.
Yes, design a set of process equipment, do a trial production, with high efficiency and good quality, and the boss will make a cup of celebration wine. A few days later
Now people abandon it because the operator cursed it. It hurts to use. And pay attention to details.
The other is the operator. If he had considered so many factors, he wouldn't still be an operator there.
It will be eliminated in use, and many complete sets of equipment, such as the engine gearbox of the car, are normal.
"It's fine", but one of the small keyways and one bearing position is broken, and the whole one can't be used.
The factory only sells the whole piece, not the accessories. There was really no place to add it myself, so I bought it in several factories.
Pile, the user had to stay at a respectful distance from sb, and set up a technical transformation project-poor technical transformation. Such a thing, as long as you stay in the machinery industry for a long time, you will see and hear it. Use is inseparable from maintenance, and good design cannot be neglected.
Make love. On large production lines, key equipment is only maintained twice a year.
It is necessary to disassemble the equipment into eight pieces, and 18 weapons of forklift jack lever are not enough. The old masters also
Dedicated to playing with some useful special furniture to serve, resulting in the loss of production has exceeded the equipment.
Value, what a wordless ending. A set of large equipment is almost replaced by an oil seal or something.
Users don't scold designers for having no children, which is really the sorrow of designers.
Our design is not only based on manufacturing, but also on innovation, but we must learn to inherit.
Nowadays, the whole society is emphasizing innovation, but we can't look down on original things as soon as we emphasize innovation.
There are two new types, one is the reorganization of the old elements that make up things, and the other is adding some elements to the old elements. Therefore, in any case, it is unacceptable that new things always contain the shadow of old things.
As philosophy says, all new things are denied in affirmation, and there is affirmation in negation. Like me
Although humans are favored by heaven, in fact, 99% of our genes are the same as gorillas.
If humans did not inherit the gorilla gene and made a breakthrough of 1%, it would be difficult for humans to appear.
Yes, if someone says that I am ambitious and don't need to inherit the gorilla gene, I will make a 100% myself.
Because, even in another 100 million years, you can't make a human. So, not for innovation.
Everything is completely abandoned. Original things are like a dish, and innovation is like a little seasoning.
Seasoning makes food taste more delicious. But no one wants a plate of fried seasoning just for the purity and delicious food.
We emphasize innovation, but we can't forget inheritance. Only inheritance, no innovation, is conformism, but that's all.
New, no inheritance, that's a castle in the air. Many people think that cloning is one of the safest and most convenient methods.
Type. But as a person engaged in the design industry, cloning is a shameful thing. The so-called one copy, two changes and three changes
Build. This paper briefly summarizes the growth path of designers. At first, you only copied, but you were copying.
When trying to understand the original designer's intentions and ideas, we should understand the transmission of the whole machine and each device.
Association, the relationship between parts, can only be drawn after understanding, and the drawings can be clear.
Fit requirements, shape and position tolerance constraints. I only know how to draw and talk nonsense.
If the degree is high, it is difficult to improve the accuracy to 0.005 and 0.002, and the drawing says no.
The name is in the Design column. What you claim to do is very complicated. This so-called machine
Teachers' hands are everywhere.
Imitating excellent works is the only way for every designer. But when designing, you must have your own ideas.
Law, people should also have their own distinctive personality. For a long time, they have formed their own style, style and accomplishment.
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Artistic accomplishment is directly related to personal accomplishment. That's what wordy people do.
What an angry person makes is petty, and the machine made by an irresponsible person is as irresponsible as that person's virtue. I can have my own design concept and style, but it's different.
West has a unique soul. An expert can tell at a glance that this is a masterpiece of heart.
When you have accumulated the experience of plagiarism, you should study with a negative attitude. Look up information and read more books.
Design cases, and design taboos, have been greatly improved by comparing with some things they have contacted.
Operate on an existing machine. For example, increase the added value of the machine, improve more functions and make the whole machine complete.
High reliability. Thereby catering to high-end customers; Or simplify the structure and keep some common functions.
Ben, meet the needs of customers who can't afford it and don't need multifunction. This can be called an introduction to machine design. It's hard to say whether you can become a world-class inventor, hehe. but
After years of experience and knowledge, it is wrong to combine, mutate and graft some structures to create something new.
He has been studying abstruse topics such as perpetual motion machine all his life, or making some inexplicable innovations.
The so-called patent value is better than using your limited life to do something that can leave some points on this beautiful planet.
Love. At that time, I will die of old age, and when I die, I think that I have lived for so many years, so it is so uncomfortable.
Running on the earth is enough to smile.
A real mechanical design engineer needs ten years or more polishing.
Rapidly. You must also have considerable talent, diligence and a good environment. Genius equals 99% diligence.
In fact, strength does not mean that you will achieve something as long as you work hard. If a person is interested in a career.
1% talent, no matter how hard you try. Diligence is a way to discover a person's talent and achieve something.
One of the necessary conditions, but not all. Absolutely not.
The material selection principle of mechanical parts should consider three requirements.
1, usage requirements (primary consideration):
1) Working conditions of parts (vibration, impact, high temperature, low temperature, high speed and high load should be treated with caution);
2) Restrictions on the size and quality of parts;
3) Importance of parts. (Relative importance to the reliability of the whole machine)
2, process requirements:
1) blank manufacturing (casting, forging, plate cutting, bar cutting);
2) machining;
3) heat treatment;
4) surface treatment;
3. Economic requirements:
1) Material price (blank cost and processing cost of ordinary round steel and cold-drawn profiles, precision casting and precision forging)
Contrast,);
2) Processing batch and processing cost;
3) material utilization rate; (For example, the specifications of plates, bars and profiles should be used reasonably)
4) Substitution (try to use cheap materials instead of relatively expensive rare materials, such as sleeves in some wear-resistant parts.
Using spheroidal graphite instead of copper sleeve and oil-bearing instead of part of rotating sleeve has little speed load.
Dragons replace steel gears or copper worm gears. ).；
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In addition, we should also consider the supply of local materials.
Basic requirements of mechanical design
A) Pay attention to the coordination and balance of the functional requirements of the machine! Prevent the emergence of barrel effect
B) Requirements for machine economy Design economy, put into production and put on the market in a short time, and recover the development period.
Consumption, even when designing and manufacturing.
Use economy should have the best cost performance (products start to earn in small batches,
Better)
2, the basic requirements of mechanical parts design
A) Work normally and reliably within a predetermined working period to ensure the functions of the machine.
B) The production and manufacturing costs of parts should be reduced as much as possible; C) Standard parts common in the market should be adopted as far as possible.
D) For products that may be serialized, consider the universality of parts at the beginning of design as much as possible.
They should also be as similar in structure as possible to reduce the process arrangement and fixture design in the manufacturing process.
Quantity.