Causal lottery system

Different from other labs when recruiting, for example, "XX Department of Capital University xx Lab (1)", followed by the person in charge, Ding Lang's lab recruiting assistants only need to write something similar to Ding Lang's Material Science Lab in brackets The end of the national key laboratory bracket is enough.

That's right, now his labs are all named after him, that's how confident he is.

…actually it was the school that did it.

This is also because Ding Lang's appeal in the industry is very strong now, and in fact, Ding Lang's laboratory has nothing to do with the school. When it was the key laboratory, the school simply used the name "Ding Lang Laboratory". Not only that, they also thoughtfully built a sign for it, and it is still hung on the door of the material science laboratory. I feel ashamed to play every time I see it.Some time ago when he became popular, some classmates uploaded photos of the brand "Ding Lang Laboratory", which is enough to prove that Ding Lang occupies a major position in the research.

Ding Lang first summed up the technologies that he had freed up now and the domestic aero-engines that were almost mature enough, and then found out the ones that needed further research and breakthroughs. This process took a lot of time.

First of all, in terms of materials science, high-niobium titanium-aluminum alloys and some ceramic-based composite materials were created by him before. The domestic development of nickel-based superalloys is quite good, but there are still gaps in resin-based composite materials. Thermosetting polyimide It has been successfully applied abroad, but there are still technical defects in China. Originally, resin-based composite materials are not as good as other performance materials in terms of heat resistance, but they have strong toughness, and the engine case needs it.Fortunately, parts like the inlet casing and the intermediate casing are considered low-temperature parts, as long as they can withstand a temperature of several hundred degrees.

China's development in this area is not slow.

Let’s look at parts and components again. The five-axis linkage CNC machine tool has attracted great attention from the country since its birth. I believe it will not be long before it can be put into the production of some high-end precision parts. Popularization... is impossible in the short term.

In fact, Ding Lang has already made breakthroughs in what China lacks most in aero engines. According to the current development level of China's military technology and these research results, it is no problem to create an internationally advanced aero engine. Of course, it must be at the leading level. It's a little difficult.Going down now is nothing more than making the aero engine even better.

Ding Lang has never doubted the wisdom of the Chinese people. In terms of theory, in fact, China's aero-engine technology is quite mature. What is lacking is the manufacturing aspect. Previously, the production of some parts in China was not satisfactory, but the five-axis linkage machine tool developed Afterwards, this problem was also solved.

After sitting in the room and thinking for a long time, Ding Lang finally decided on the following research project.

He solemnly wrote the words "low aspect ratio blades" on the paper.

This technology is also known as wide-chord blades. Compared with narrow-chord blades, the chord length is widened, the length of the compressor is shortened, the damage-free performance, fatigue resistance and stall margin are improved, and it can also reduce Production and manufacturing overhead costs.

Although this technology is currently widely used in some foreign engines, there are still many problems to be solved. The key problem is the increased centrifugal force at the joint between the wheel disc and blade root and the wheel disc itself due to the increase in weight.

The capital, the headquarters of Huaxia Aviation Industry First Group Corporation, Huaxia Aviation Research Institute.

Huaxia Aviation Industry No. [-] Group is a super-large state-owned enterprise, mainly responsible for the R&D, production and sales of military aircraft, civil aircraft and aero-engines, airborne equipment, and weapon fire control systems.

And this company has Huaxia Aeronautical Research Institute, which has achieved a large number of aviation scientific and technological achievements over the years. It has a national aircraft test flight test center authorized by the state, with strong scientific and technological strength and professional and high-level aviation research and testing facilities.

At this time, the atmosphere here is very dignified, because a new round of testing work is going on here.

The results were, as always, disappointing.

"It is still not enough in the production of parts... Some parts still need to be polished by a master craftsman. Once mass production, the accuracy will not be able to keep up!" A research and development staff lamented.He is not disappointed. The result this time is actually predictable. The country's technology in this area is still not enough, but it has been making progress. Didn't it break through the high-niobium titanium-aluminum alloy technology the year before last? Now it has been practically applied On to aviation.

After all, it will gradually improve.

Several people sighed and turned to analyze the data.

Although I know that I will fail, but I will learn from the experience and lessons from the failures again and again, and I will improve next time. This kind of improvement will accumulate little by little, and there will always be success.

At this moment, Zuo Ming, the general manager of Yihang, walked over quickly.

Under normal circumstances, he seldom came to the research institute. He was afraid of disturbing the work of the R&D personnel. At this time, he came here with a happy face, not knowing what was going on.

"Lao Xia! Lao Zhang! Lao Geng! Come here, come here!" Zuo Ming was very excited, holding a document in his hand, "There is good news!"

Lao Xia, Lao Zhang and Lao Geng glanced at each other, dropped their work and turned to look for him.

One look, ouch, this Zuo Ming's face is flushed, it seems that it is really a good thing.

"The accuracy of the parts is a problem! Just now Lao Zheng called me and said that China has developed an internationally leading five-axis linkage CNC machine tool. The news has not been announced to the outside world, but it is estimated that it will be allocated to us before the end of the year! Then we will be able to use it." Mass production of high-precision parts!" The old Zheng mentioned by Zuo Ming can be regarded as an insider, and now only a few people know about the five-axis linkage machine tool, and he was found out by Lao Zheng and told his friend Zuo Ming.

This machine is good, no one should rush to get it, but the current production capacity is estimated to only produce a few units a year ago, which will be enough for several key research laboratories. Naturally, the military industry and aviation industry must be followed first.As the leader of these two technologies in China, it is almost a certainty that Yihang was assigned to one of them a year ago.

Everyone was excited when they heard the news.

The key technology Yihang has been researching all the time. It is the same thing in theory, but it is still stuck in the accuracy of parts when it is really going to be produced. Even the parts polished by master craftsmen cannot guarantee that each part is accurate, and The speed is also slow in this way. More importantly, there are very few master masters, and they can’t polish it when they are 60 years old (physical strength, vision, etc. can’t keep up). The new generation of masters does not have particularly good skills, so Lao Xia and the others have been worrying about the spare parts.

Now that they heard that a five-axis linkage CNC machine tool was developed in China, they were naturally relieved, followed by excitement.

With this thing, the success of the new aero-engine will add weight.

The author has something to say: Every time I come across a new technology, I try to use a chapter to explain the technology and compress the number of words, so that many people will skip the content after reading it (... I will say that I especially like reading this article. Content?) If you don’t want to watch it, you don’t need to buy it. I will explain the plot and you can skip it when you buy it.

Then when I write later, I don’t need to explain this technology orz In order to write this article, I went to the library and searched all the materials I could find...