There is such a mechanical designer, he presided over the design of dozens of products, and its cooperation with a variety of big bull design institutes, universities, enterprises. Let him tell us about the years of experience in design!
“ over the years, I in non-standard mechanical design a stumbling, dozens of product design host, well-known and capital in these projects design and Research Institute, famous universities and fraternal units conducted several cooperation.
I deeply appreciate, mechanical design talent and uneven in quality, too many fish in troubled waters fish for fame. ”

At present, most people like to learn to work to find shortcuts, summed up in three ways:
The smartest way to imitate others, learn from the experience of others
The most precious way - through their own deliberate practice
The most painful way to sum up the experience and lessons of failure
The past several talented engineers, such as Archimedes, Finch, · Nigulasitela, their design ideas to future generations of modern Furao grams, Hansen, Roden Knaak, Vogl Bauer, Kesselring, genius in the mechanical design research.
Foreign industrial empire business book and engineer a book, read a few of the benefit.
Unlike emerging industries such as electronics, a lot of engineers to share their experience on the forum to share. Machinery industry in view of today's intellectual property rights do not cover each other in place, the machinery industry mostly dike, lest someone will understand. I would like to record their own in the process of design, drip, communicate with each other.
The way of Mechanical Engineer

Baby class

This level is to master the tools needed to design
Proficiency in CAD, ProE, SW, ANSYS, Mathcad, etc..
Deep understanding of material mechanics, engineering mechanics, mechanical design theory, machining process, metal technology and other basic theory.
Basic knowledge of tolerance and fit, engineering material.
Of course, what is a skilled operation?
Often see those claiming to be using some software very skilled boys practical software is so strange, proficiency well defined, if must be quantified so can only give a volume with a myopia, if software engineering drawing is less than 500, if not enough to draw three-dimensional model of thousands would not say he is skilled.
Deep understanding of mechanics
This is the same, not familiar to those points, at least that of a subject can systematically from A to Z wear.

Familiar with relevant knowledge
This is a further requirement. For example, the tolerance is to master the benchmark system, form tolerance, position tolerance, tolerance, extension of knowledge by heart, application of the tolerance, tolerance detection, and the processing process to ensure these tolerances technology have a preliminary understanding.
To meet these requirements, with the basic knowledge of mechanical design.
Infant class

Drawings are the language of engineers,
As children should learn to speak.
GB is grammar
Three common, fifty drawing standard should be memorized, if the enterprise standards and norms will be a little more. These are not so difficult, drawing two thousand or three thousand engineering drawings, these standards will form a habit. &ldquo has also said on the map before, and now many years of mechanical design staff even a decent drawing can not draw ”.
Three dimensional graph grammar
Three dimensional map is also a grammar, and not in accordance with the size of the three-dimensional drawing on the line.
Is from top to bottom, or from bottom to top, from the bottom of the parts from time to time must be assembled for the next step, policy, modify to prepare. How to choose the base level, what features are not selected. The part drawing sequence must be combined with the processing sequence of the parts, which is the combination of the processing technology of the first or the first rotation. The same is true for the assembly of 3D drawings, which are progressively assembled according to the assembly of the assembly specifications.

Children level

Children's level is the most ~ ~ ~ a stage, this stage can be completed under the guidance of the teacher's simple parts design.
Since it is certainly to the design of parts of the functional requirements of mechanical properties well, and then the appropriate mechanical calculation.
“ do not rely on analysis software, because when you do not understand the essence of the software is blind. It is important to emphasize that any software is a tool in the design of the machine. The real value is the designer's thought and creativity, not the software. ”
The purpose of the analysis is to meet the requirements of the performance of the work at the same time, to achieve lightweight, simple processing, reduce costs, in fact, is the problem of money.
Technical aspects
This stage should be very clear that every part design is how to process out, use what tools, what kind of the surface treatment process, each tolerance of the meaning of existence, the only way to ensure that your design parts can be manufactured in today's processing conditions.

Assembly problem
Then is the assembly problem, the heart should be more clearly their own design components, machines, is how to install, what tools to use, need to install the hole, do not locate. Then repair, use, easy replacement of vulnerable parts.

This stage should be a profound understanding of the understanding of the process more meaningful than theory, this stage you will gradually feel the daily production of three-dimensional animation and generate 3D software show red yellow and green grid can only be regarded as a draughtsman.
Have a chance to catch it
When the stage is finally finished, I found that as a designer can finally design their own simple structure. At this time also slowly found someone to scold you, orSaid a chance to catch it.

Because of the production, procurement, use, maintenance, transportation, all errors can be attributed to the design of the error, it is true, because the design can be avoided.
1, workshop workers will scold you

The reasons are as follows: you design a part of a process will allow them to replace 20 knives; because you design components of a tolerance in processing a pass rate of only 50%; because the machining design needs when you toss toss about several times, even to a machining and made a pile of work because you installed, the design of a quality inspection personnel must detect parts inspection to the three coordinate.
Simplicity is the general idea of science. It is said that after the completion of a part of foreign designers to design their own words — — tolerance accuracy can be a little lower, the structure can be more simple.
2, the user will curse
The operator is the most reactive, so you must use the design of the product people think stupid enough.
For example, the designed equipment to operate, or with manual you write 50 pages, so that the operator is difficult to grasp.
For example, the wrong operation, do not doubt that the error is caused by the designer's design errors, if you put the two button design, the operator will certainly be careful not to press the wrong ah.

For example, comfort, if you know the optimum height of operator manual is 1~1.2 meters, when the general operation of about 50N the most comfortable, below 20N to consider the possibility of misoperation, the operation of more than 130N people will feel laborious.
“ rigorous statistical computation can solve this problem:
A handle in the high position how much power is needed to move the can can be calculated easily, by an ordinary worker can specify the conditions in force can also statistics, operating in what can be the most comfortable height statistics, when holding the handle when the handle is made of what the size of what the shape of the most comfortable, all of these issues have occurred. ”

If these are met, the customer may still feel your design is not too comfortable, perhaps the operator himself could not say what design is not reasonable; the designers can still avoid the "mechanical design" and "design aesthetic psychology" which is a required course designer.
For example, your data on a dashboard display 8 digits, but the average person's memory is not the best length of more than 7;
For example, one of your design results is strong enough, can you feel that others seem fragile structure;
For example, a product with affinity, after you have been designed to make people feel afraid to touch, and so on these issues, you can find the answer in the psychology and the United states.
3, operation and maintenance personnel will scold you

What kind of packaging products, how to transport, the use of road transport when the length and width of the high limit, if you need to export products to consider the container factor, and so a series of problems.

Maintenance is a subject, or that sentence is simple “ ” science; the same product other designers need to obtain a bachelor's degree at MIT to repair, you only need to design a migrant workers can maintain, this is the design of the state; product maintenance personnel with a kind of customer service with two wrenches two accessories fix, and you need to design products with a wrench of a socket wrench set in six angle wrench, plus 20 kinds of accessories, this is definitely your design failure.
“ so do a less scolded designer, but also to establish a lifelong learning commitment. Design is a challenging job, so don't complain about how many people criticize you, and don't think that my design is flat. ”
Junior grade
The longest of the children's class is finally over, and then the next few grades. The so-called young frivolous, then feel the level of design is more exhaustive, frivolous, arrogant, not deliberate, feel experience, always most probably it did not actually happen.

At this stage can be used to describe love, deeply love each of their products, deeply in love with their own industry.
Each product is the designer of the child; cited a famous saying love will pay “ ” then, paying too much will be madly in love.
Ideological aspect
Because of paying too much sweat for mechanical design; in order to design a product and sleep at night, or even a failure in the design and woke up in the dream; pay attention to every detail even for a bolt of choice and effort; in order to studying a subject through countless nights; for the unknown fields a person with boring professional books; the best time to machinery, so frivolous understandable because you have a basis for some frivolous.

Skill aspect
This stage not only know each part is how processed, and know the parts have many kinds of processing methods, each procedure card several times on the machine are needed, what kind of machine tool accessories, need to use what tool specifications.
For example: take the thread turning the inner and the outer thread each need what common thread cutter tool, how many, how many kinds of thread cutter feed mode, trapezoidal thread serrated thread rectangular thread various processing.
Coordinate all aspects of demand
In a word, all errors are the fault of the designer. The mechanical designer is pathetic. It is not easy to design good products.

Manufacturers want to minimize costs, vendors want to attract customers.
Customers will pay attention to the price, appearance and brand when purchasing.
FrontlinePeople care more about the function and operation of the product.
Aftermarket maintenance personnel are concerned about the product disassembly, inspection and maintenance of the easy.
There are different requirements for the various aspects of the product, and this demand is often conflict with each other. Even so, a good designer is still able to design all aspects of the product can be accepted or can be satisfied with the product.

Mechanical designer notes
1, drawing is a designer's face, face job.

A drawing can be seen by the basic qualities of an engineer, a drawing designer can see the rigor and the national standard of mastery, a drawing can also be seen on the process's familiarity with the designer.
The realm of painting is the combination of rigorous and art, all the standards, knowledge, analysis is to a word “ the United States ” this is a higher level of drawing requirements. As the basic skills of the designer, the so-called work into the natural, “ drawn 18K Zhang drawings, will see beyond the mechanical beauty ”.
2, the design and application of thread can be seen on the basis of the designer.

It's hard work. The thread is like the &ldquo in mathematics; 0&rdquo, the simplest and most complex, but it can be seen everywhere.
From the British Empire invented the thread, then the implementation of Union standards and uncle Sam extension of the metric (Metric) thread, metric thread in the strict Germanic extended to Europe and then shipped to the Chinese thread, applied to a variety of conditions in the long evolution.
Metric screw thread common, American unified thread, inch Whitworth, small thread, thread for aerospace.
For metric trapezoidal screw drive, acme thread, metric thread tooth, American serrated thread, inch serrated thread.
For the imperial seal pipe thread sealing pipe thread sealing, English Non - Japan and South Korea, the old imperial pipe thread sealing pipe thread, ASME, American dry sealing pipe thread sealing pipe thread, as non metric thread.
In addition to the industry, such as special threads.
The mechanical analysis of the space curved surface is more complicated.
3, tolerance is a philosophy, is a kind of thought, is the essence of machinery.
Tolerance is called the essence, because tolerance is an important factor affecting the performance of the product, the cost of tolerance can be solved; reduce the cost and guarantee the performance of contradiction; tolerance understanding designer can see the spatial imagination ability, ability to understand abstract things, logical thinking ability.
In the mechanical design industry I have experienced, can understand the tolerance of the very few people, it is not in; I read about tolerance books, people can write that scanty tolerances, mostly a paste up.
4, mathematics, mechanics determines the height of mechanical design.

Design is to set the size, shape, material, parts combination characteristics and combination of the machine.
The designer should have scientific support, to use a lot of mathematics, mechanics and related disciplines; dynamic mechanics, mathematical statics, dynamics, the resulting information will than designer intuition and is estimated to be accurate and reliable. In addition, mechanical principle, mechanism and so on are also the combination of mathematics and physics.
5, the level of English (foreign language) determines the development of the design space.

6, if these people are in front of the body, then the way of thinking, design ideas, design style is the soul of a designer.

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