Chapter 322 military orders

The rise of Dongchen SC1 didn't really excite the senior management, but the most exciting thing for the senior management was Dongchen's high-precision machining center in a highly confidential state. Since Zhang Yunfeng made Dongchen's machining center open to the senior management, the senior management has constantly received a large number of generation of processing needs from the military industry and aerospace field, as if knowing that Dongchen has all The world's top-notch high-precision processing capability, all military enterprises want to follow the stigma.

There are more than 400 demands in the hands of senior managers. Some of them are of great significance and urgent, such as the high-precision machining of aerospace engine parts. However, some of them are hard to avoid crying and laughing. For example, light weapons manufacturing enterprises try to let Dongchen process several different specifications of barrel and rifling in the barrel, so as to improve each The shooting accuracy, range and power of the guns.

This kind of demand can be said to be very absurd. There are more than ten million military guns in China. If each one needs high-precision customized production, then Dongchen, the processing center, has been working for a hundred years at a time, and it may not be able to finish all the barrels needed by all the guns in service. Even if the barrels processed with high-precision have such high precision, its significance is also significant Difficult to apply to mass production.

Finally, the senior management gave an objective priority order, and handed the first entrustment document to Director Liu. After seeing the top secret document, director Liu felt that the responsibility and significance were quite significant, and immediately took a plane to Jiangcheng without hesitation.

These two days, Zhang Yunfeng's family has moved to the duplex building in Swan Bay, and Zhang Yunfeng has finally come to spend a few days with his parents, who used to live a holiday like life. The three members of the family have a good time, but it makes Zhang Yunfeng feel a bit depressed. Now, Dongchen's profitability has been enough for his consumption for several lives. At this time, is it also suitable When you give yourself a sigh of relief, let yourself have some time to enjoy life.

Looking at the productivity of Dongchen's production line in Jiangcheng, the project of SC1 has been successfully completed and achieved unprecedented success. Next, Dongchen needs not to worry too much about setting up a competitive team. It only needs to do two things: one is to find a professional team manager who is good enough, the other is to provide enough cash, so that The manager is at ease and bold to build Dongchen's team.

But when Zhang Yunfeng thought he could take a vacation before his eyes, Liu came to see him.

Moreover, this time, director Liu's coming is quite unusual. He is accompanied by four tall and strong men in suits and black sunglasses. At first sight, he can see that these four men are absolutely good at martial arts. But director Liu also has a portable metal box. This metal box needs to be opened with two keys at the same time. Zhang Yunfeng saw it for the first time and thought it was the legendary United States With the nuclear weapons terminal in the hands of the president of E.

Zhang Yunfeng asked Liu to talk to the study upstairs. These four big men, two of them guarded the stairway in the compound building, and two of them guarded the door of the study. They were very alert.

Zhang Yunfeng sat opposite to Director Liu and asked curiously, "what's the situation today? How can we have such a big battle?"

Director Liu smiled and said, "today I came with a very important confidential document." As he said, he put the box in his hand on the tea table, went out and asked a tall man to come in. As soon as he entered the door, he immediately took out a key from his neck, opened one of the locks on the box, then put away the key, saluted officer Liu, turned around and went out.

After he went out, director Liu took out another key and opened the other lock, which opened the metal box, took out a file bag sealed with a seal, and said to Zhang Yunfeng with a straight face: "here is a file. First, you have a look."

Zhang Yunfeng took over the file bag, opened it and found that it was actually a commissioned processing document.

Zhang Yunfeng was not surprised by the entrusted processing. What surprised Zhang Yunfeng most was that this letter of authorization actually entrusted Dongchen to build three nuclear submarine propellers according to the requirements provided by the military.

This shocked Zhang Yunfeng. He exclaimed and asked, "director Liu, do the senior managers really want Dongchen to process this project?"

Director Liu nodded and explained: "the project is mature in the hands of the military. The three candidate designs are all seven blade propeller designs. The three propellers are slightly different in propulsion speed, noise level and resistance level. The military has carried out experiments on these three designs respectively at present, and the results are not very ideal, and Compared with Dongchen, the military's high-precision processing power is much weaker. Therefore, the head of the project hopes that the three design schemes can be reprocessed by Dongchen occasionally, and then tested again by the military. "

Zhang Yunfeng smiled and thought to himself: the most important part of submarine is propeller, because propeller is the last link of the whole submarine power transformation, and also the most critical mitigation. Whether it is nuclear power or diesel electric power, the propeller is ultimately used to form thrust. For sonar detection, the largest noise source of submarine in water is also It is the propeller. The aerodynamic shape of the propeller not only determines the noise during operation, but also determines the maximum utilization rate of the power. It can be said that it is a very high-end national defense technology. As for the strategic nuclear submarine, the three parts are the most critical, except for the nuclear reactor and submarine launched missile, which are the propeller. Therefore, the shape of the submarine propeller in developed countries has always been listed as the top secret.

Then, director Liu took out a special U-disk and a ultra-thin laptop from the box, and handed the U-disk to Zhang Yunfeng, saying, "all the detailed data are here. If you understand, you can read it first."

Zhang Yunfeng nodded, just wanted to take his own computer, Liu officer hurriedly said: "don't take the computer, use my one first, this one doesn't have the function of connecting the Internet at all, it's safer."

Zhang Yunfeng couldn't help smiling and said: "this thing, you think it's top secret, it's really of great significance, but as far as our current situation is concerned, those with nuclear submarines are better than those we make, those without nuclear submarines, with our information, it's not very useful. As far as the manufacturing technology of screw propeller is concerned, the United States, Japan, Russia, France and Germany are much better than us."

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Zhang Yunfeng roughly looked at several detailed drawings and found that these three designs are all seven leaf designs. As for the information in the super learning system, the top manufacturing technology today is eight leaf or nine leaf. The Ohio class strategic nuclear submarine with the largest number of active service in the United States has adopted eight leaf propeller design, the latest model to be finalized, which should be adopted It's already nine leaf design.

Zhang Yunfeng asked in surprise, "why do we use the seven leaf design for our latest nuclear submarine? Is this a bit behind the times? At least eight leaves? "

Director Liu said with a smile: "this thing is not so simple. It doesn't mean that eight leaves are eight leaves. Now, the design of seven leaves costs a lot of manpower and material resources. We have to calculate, manufacture and test the data in the water test time after time. The size, thickness and angle of each propeller have slightly changed, and the results can be achieved Energy is the difference between the sky and the earth, especially the angle of inclination, with a deviation of 0.1 degree. The noise will be much larger. We have relatively mature design of seven leaves. Eight leaves design has been tried many times. Up to now, no design can be close to the current level of seven leaves, so we can only temporarily select seven leaves. "

Zhang Yunfeng sighed and said, "it's not so difficult. It's such a big problem to build a propeller."

"Not really!" Director Liu was also helpless and said: "you see, the propeller of this submarine is so different from that of surface warship. The propeller of surface warship doesn't need so much effort to design and manufacture. It doesn't matter if it's noisy. Anyway, the noise of surface warship is not a big problem at all. Even if the thrust utilization ratio is a little lower, it doesn't matter if the volume of surface warship is large The space is large, which can make up for the shortcomings of the propeller from the engine. However, the submarine is not the same. Its space is very precious. The power configuration has been maximized. When it is in the water, the resistance is large and the speed is slow. The most important thing is that the key problem for the survival ability of the submarine is the noise level. In this way, the requirements of the submarine for the propeller It's too high and too high. It can be said that in the world, wherever propeller is used, submarine propeller has the highest manufacturing technology and scientific and technological content. There is no one. "

Liu said: "we also know that the manufacturing technology of Dongchen is very strong. The nine leaf and eleven leaf propellers of western countries must be able to be processed. However, we don't have drawings. This is the biggest problem. The technology of seven leaf propellers alone, we have been mopping around for 20 years. Finally, we bought the kilo class of e country before we started Basic mastery of calculation. "

Zhang Yunfeng nodded, thinking that with Dongchen's high-precision processing strength and the information in the super learning system, Dongchen is fully capable of producing the top ten one blade large side skewed propeller, and the drawing problem that plagues the military is not a problem in Zhang Yunfeng

Thinking of this, Zhang Yunfeng said: "director Liu, please convey to the leaders on my behalf that Dongchen will not produce the old and imperfect seven leaf propeller according to this set of drawings. I will apply to the team to get better technology. I also guarantee that the propeller produced by Dongchen will be better than that designed by the military."

Liu did things but he couldn't say anything. After a while, he murmured, "isn't it? Your team has also mastered the manufacturing technology of submarine propeller? "

With a smile, Zhang Yunfeng said: "I'm not sure, but I don't think it's a big problem."

Director Liu knew that Zhang Yunfeng rarely or almost never said anything uncertain. Hearing that, Zhang Yunfeng was surprised, but he was also surprised: what kind of existence is the team behind Zhang Yunfeng? They can make the best cars and materials. Now, they even master the core military technology, which seems too difficult to understand, right?

At this time, Zhang Yunfeng