Reliability optimization design analysis of mechanical engineering?

1 China's mechanical engineering reliability optimization design necessity

1.1 social needs

With the continuous development of society, scientific and technological advances, more and more products appear on the market, people are gradually on the quality of the product in all aspects of the higher requirements, and with the concept of change, people in the quality of the use of the performance of the aspects of the importance of the far higher than the appearance. Appearance and other aspects. Therefore, enterprises to achieve their own sustainable development, the reliability of mechanical products must be guaranteed, which is why the reliability of mechanical engineering optimization design is an important reason.

1.2 The progress of science and technology, product complexity enhancement

The twenty-first century, is a stage of rapid development of science and technology, which has brought us the benefits of gradually began to spread all aspects of life. Of course, this also includes the renewal of mechanical products, on the one hand, it makes the product can have more and more complex functions, but on the other hand, this also represents the mechanical products producers, need to spend more energy in ensuring that the performance of the product is to achieve that is the reliability of the product. Therefore, the reliability optimization design of mechanical engineering came into being.

2 China's mechanical product reliability design level

Although since the reform and opening up, China's machinery manufacturing industry has been unprecedented development, and in the product reliability design has also made a qualitative leap. But China's machinery manufacturing industry relative to the developed countries in the West, the start is late, the development is slow, so the reliability of the product design is still far inferior to them. In order to narrow the gap, many companies have gradually begun to pay attention to the reliability of product design, many companies in order to improve the reliability of their own product design level have set up a special research department, and the introduction of a large number of professionals on this aspect of research. But in fact, many of the research is still in the initial theoretical period, very few of them can be practiced, and the improvement of the reliability level of the product does not play a substantial role.

3 China's shortcomings in the research of mechanical product reliability design

3.1 Talent gap caused by the education system

No matter in which industry, to realize the development of the industry, talent is a very important factor. Naturally, the reliability design of mechanical products is the same, in order to realize the reliability design level of mechanical products, the training of talents is very important and necessary. And the university is an important place to cultivate such talents. However, the reality is that, although in recent years, many universities in China have opened a mechanical engineering related majors, but the reliability design of mechanical products is only a few colleges and universities have this kind of specialization. This undoubtedly creates an obstacle for the cultivation of mechanical product reliability design talents in China. As mentioned before, with the progress of society and the development of science and technology, the reliability design of mechanical products has become more and more important. However, because of this educational problem, but caused a serious talent gap, which is extremely unfavorable to the development of China's machinery industry. Therefore, the relevant education departments must pay attention to this aspect, the relevant universities should also be based on the needs of society to open the relevant mechanical product reliability design specialties and courses, and arrange for experienced teachers to be guided to effectively improve the quality of teaching and training of excellent mechanical product reliability designers.

3.2 Insufficient attention to the enterprise itself

While there may be a lot of reasons that affect the reliability design of mechanical products, but the most critical is the enterprise itself. Although, in recent years, China's machinery manufacturing industry is in the stage of vigorous development, part of the enterprise has begun to pay attention to product reliability design. But because of the late start of China's machinery manufacturing industry, in terms of business operations, many enterprises still have misconceptions. In the concept of many enterprises, the reliability design of mechanical products is not so important, or even negligible. But this is actually a very wrong concept. As mentioned above, with the development of society, people gradually on the quality of the product and the realization of the use of performance to give unprecedented importance. If a mechanical product people before buying, a clear understanding of its function, but because of the reliability of the design problems, there are functions can not be realized, which will inevitably cause consumers to question the quality of the enterprise products. This will be a very serious loss of reputation for the enterprise. Therefore, enterprises must pay attention to the reliability of the product design, to have a specialized department to manage this aspect, but also pay attention to the reliability of the product design research can not just stay in the theoretical stage, to be practically applied in practice, because only this research is really meaningful.

4 corresponding design methods

4.1 Robust design

Robust design, as the name implies, is to make the product performance of the product will be encountered in the process of product manufacturing environmental changes have a certain degree of resistance, will not be with the changes in the environment to make the product performance also changed. At the same time to ensure that the product in the shelf life are able to maintain a greater degree of its working condition, will not easily lose the ability to work. This design method can effectively improve the reliability of the product, but because it requires a large investment, so it is more difficult to realize.

4.2 Failure prevention design

Failure prevention design is to prevent failures or minimize the possibility of failures by processing the product through the experience of similar products with failures. This is one of the most effective ways to ensure product reliability. Specific operations, a simple example, if a part of the mechanical products to prevent failure design can start with the selection of that part of the material, first of all, we must refer to some of the past parameters of the product, select the most appropriate materials, and also take into account the corresponding product maintenance and other aspects of the product, so as to make the most perfect design of the reliability of the product.

4.3 Derating design

Derating design that is, by reducing the use of product parts and components stress, and make it lower than the product originally indicated rated stress. Thus, to a certain extent, to reduce the probability of failure, to ensure the reliability of the design method. In the past, most of the mechanical products operated under the environment of lower than the rated stress can reach the highest state of reliability. However, the implementation of this method is often very difficult. Because the specific how much to reduce the most appropriate is not a rough estimate, but must be through a long time, a large number of experiments to be able to come up with the most accurate data. This will ensure the reliability of the product.

5 Conclusion

In summary, in recent years, China's machinery products industry continues to develop, people on the quality of the product and the use of performance also give unprecedented attention. However, due to the late start of China's machinery manufacturing industry, its reliability design level is far less than that of other developed countries, coupled with the lack of reliability design talents caused by China's education and the neglect of mechanical enterprises on their own reliability design research. This makes the reliability of China's mechanical products is far from being able to meet the market demand, so the reliability of mechanical engineering optimization design came into being, which will undoubtedly play a huge role in promoting the development of China's machinery industry.

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