Working Lessons from a Veteran Mechanical Design Engineer
Working Lessons from a Veteran Mechanical Design Engineer
Mechanical design is often inseparable from their own experience, the accumulation of experience can be learned from books, but not personally difficult to leave a deep impression in the mind, the experience of others, they do not have a certain foundation, to understand the absorption is really a very difficult thing.
Design is the whole process of design, manufacturing, use and maintenance. The design process is greatly influenced by manufacturing, which means that good design cannot be separated from manufacturing, and the more you know about manufacturing, the more you can improve your design. The more you know about manufacturing, the more you can improve your design. I have never seen many drawings that can be assembled immediately according to the drawings. The level of the design is one aspect of the process, but the lack of understanding of the manufacturing process on the part of the designer is the main reason. How do you determine your level of knowledge of manufacturing? The easiest way to do this is to grab a random drawing of something of your own design can you tell the whole process of its manufacture. Casting, forging, turning, clamping, milling, planing, grinding, just like that, surely not, who hasn't been in a machine shop for a few years? It has to be broken down to get a full understanding of each process. For example, how to split the casting, how to put the gate riser, what kind of casting defects may occur, the part structure in the heat treatment will not lead to accidents, how to optimize the part structure, cutting process, in the mind virtual out, a total of several knives, speed, the amount of walking tool, even where the iron chips look to fly, the order of the use of each knife, turning, milling, grinding workers' Operation action of the whole process, so and so on, before it is considered to have a better foundation. It is not that engage in design will necessarily play lathe, milling machine, will burn welding can, but to know the characteristics of these operations, to be fully considered in the design, as engaged in mechanical design so that only than shaking lathe burn welding strong, only to have a place to live. In this way, in the design process, it will avoid some unreasonable structure, the quality of the design naturally improve a lot, but it is not enough, a decade eight years of seniority of the mechanic can put forward more mature details than you program (although the overall design of the co-ordination they can not do), but how many sleepless nights to design such a result, is not a gentleman to sweep the floor yeah? The only solution is to read more books. What others conclude is usually combined with production and is the result of hard work. Learn with the problem in mind, you'll digest it. No more silly answers like "just make sure the concentricity will be fine", the key is that you have pointed out the way to ensure concentricity, even the mistakes of your predecessors. This time, no one calls you Xiao Qian, Xiao Zhao, even the boss calls you Qian Gong, Zhao Gong, quite respectable. But the design is always to use, good design must have a little bit of humanity, design a set of technology equipment, a trial production, high quality and good efficiency, the boss to engage in a cup of celebratory wine. After a few days, found that people abandoned it, the reason is that the operator scolded the mother ah. Painful to use ah. And to pay attention to the details and more, there is an operator, if he considered so many factors would not still be there to do the operator ah. Design is not conducive to use, face out, there are a lot of complete sets of equipment, such as car engine transmission and so on normal operation, "quite good," but one of the small key slot, a bearing bit, what a place bad, the whole can not use, the factory only sell the whole, not to sell accessories, their own enhancements really no place to add up, replaced! Several factories went to buy, put a bunch of them on the table, and the user had to respect and stand up a technical improvement project - poor technical improvement. Such things as long as the mechanical industry in the long turn will have seen and heard. Use can not be separated from the maintenance, good design can not ignore the maintenance. In a large production line, the key equipment, a total of a year also maintenance so twice, but each of this equipment to unload eight pieces, traveling crane forklift jack pry bar eighteen kinds of weapons is not enough, masters have to their own special brain to play a few kinds of useful special equipment to serve, resulting in the loss of production stoppage has more than the value of the equipment itself, really a silent ending. A set of large equipment just because of the replacement of an oil seal and so on, are to almost the whole machine completely disassembled, the use of units do not curse the design is to do the things that break off the grandchildren, really is the sadness of the designer.
Engaged in design is not only to stand on the basis of manufacturing, but also have innovation, but must learn to inherit. Nowadays, the whole society is emphasizing innovation, but we can't look down on the original things as soon as we emphasize innovation. Usually there are two kinds of innovation, one is the recombination of the old elements that make up something, and the other is the addition of some new elements to the old ones. Therefore, no matter what, it is undeniable that the innovative things always contain some shadow of the old things. As it is said in philosophy, new things are born out of affirmation in negation and affirmation in negation. For example, although we humans are said to be the proud sons of nature, in fact, 99% of our genes are the same as the gorillas. If human beings did not inherit the gorilla's genes on the basis of a 1% breakthrough, the emergence of human beings is unimaginable, if someone says I have the ambition, I do not need to inherit the gorilla's genes, I get a 100% pure human genes, then you are another 100 million years, also can not come up with a human to. That's why you can't throw away all the old things for the sake of innovation. The original is like a dish of food, and innovation is like a little seasoning, with such a little seasoning, the taste of the dish is more delicious. But no one wants a dish of stir-fried seasonings for the sake of pure taste. So we emphasize innovation, but can not forget the inheritance, only inheritance, no innovation, that is old-fashioned, and only innovation, no inheritance, that is a pavilion in the air.
1:1 cloning may be considered by many to be the safest and most hassle-free way to design. But as people engaged in the design industry, cloning is a shameful thing. The so-called one copy, two changes and three creations. This succinctly summarizes the path of growth for designers. When you first start, you can only copy, but at the same time copy to desperately try to understand the original designer's intention and thinking, to understand the whole machine transmission, the interrelationship between the various devices, the interrelationship of each part, after understanding the drawings, drawings can have a clear size with the requirements, shape and location tolerance constraints. Only know draw down, casually pull a few lines up, probably feel the machine precision is high, play hard to mention the precision to move on 0.005, 0.002, in the drawing on the signature in the design column. Called themselves engaged in things is very precise. This unknowingly called mechanical mechanical design engineer's letter hand is full of.
Imitation of good works is the only way for every designer. But design, we must have our own ideas, people should have their own distinctive personality, a long time, formed their own style, style and a person's art quality and personal cultivation is directly related. A long-winded person makes something that is so long-winded, a stingy person makes something that is a small family, an irresponsible person makes a machine that is as irresponsible as that person's virtue. To be able to have their own design philosophy, design style, is different, so that the pounding out of the thing has a unique soul. A connoisseur can tell at a glance that this is a masterpiece of the heart.
When you accumulate experience in copying, you have to learn with a negative attitude. Look up information, read more classic design examples, and design contraptions, and compare with some of the things you've touched, and you'll have improved greatly. You can then operate on the existing machine. For example: increase the added value of the machine, improve more features, so that the whole machine has a higher degree of reliability. So as to meet the high-end customers; or to streamline the structure, retain some common functions, reduce costs, to meet the needs of some customers who can not afford to buy then also can not use the multi-function. By doing so, you can be said to have started to do mechanical design. It is hard to say whether it can become a world-class inventor or not, huh? However, it is not difficult to combine, mutate, graft and create something new with my experience and knowledge. Rather than spending my whole life researching into such profound issues as perpetual motion, or doing some so-called patents that somehow cannot create any value, I'd rather use my limited life to do something that can leave a little mark on this beautiful planet. When I am old enough to die, I will still think that I have lived for so many years and tampered with so many machines on earth that I can smile on my deathbed.
Therefore, a true "mechanical design engineer" can be called, is the need for ten years or even more than ten years of trials and tribulations, but also considerable talent, and diligence and can create a human environment. Genius is equal to 99% hard work + 1% effort actually says not as long as the hard work will have success, this sentence says that if a person does not have the 1% talent for a profession, then hard work is useless. Diligence is a way to discover your talent, is one of the necessary conditions for achievement, but not all.