The rise of Dongchen sc1 did not really excite the top management, but the thing that excited the top management the most was Dongchen’s high-precision machining center that was kept in a highly confidential state. Since Zhang Wenhao disclosed Dongchen’s machining center to the top management, the top management
We continue to receive a large number of OEM processing requests from the military and aerospace fields. It seems that it is because we know that Dongchen has the world's top high-precision processing capabilities, and all military industry companies want to follow suit.
The various demands summarized in the hands of the top management have exceeded more than 400 in total. Some demands are significant and urgent, such as high-precision machining of aerospace engine parts, etc., while some demands are inevitably dumbfounding, such as the manufacturing of small arms.
The company is trying to let Dongchen process several barrels and internal rifling of different specifications in order to improve the shooting accuracy, range and power of various firearms.
This kind of demand can be said to be very ridiculous. There are more than tens of millions of guns in use in the world. If each one requires high-precision customized production, then the processing center of Dongchen will work non-stop for a hundred years, and it may be difficult to
All the barrels required for all guns currently in service have been processed. Even if the barrels are processed with high precision, it is difficult to apply them to mass production.
In the end, the senior management gave an objective ranking of priorities and handed the first entrustment document to Director Liu. After reading the top-secret document, Director Liu felt that the responsibility and significance were quite important and he immediately did not hesitate.
Take a flight to Jiangcheng.
In the past two days, Zhang Wenhao's family has moved to a duplex building in Swan Bay. Zhang Wenhao finally had time to spend a few days with his parents, which was like a holiday. The family of three was enjoying themselves, which made Zhang Wenhao feel a little depressed.
, now Dongchen's profitability has already been enough for him to consume for several lifetimes. At this time, can he give himself a sigh of relief and give himself some time to enjoy life?
Seeing that Dongchen's production line in Jiangcheng has begun to become productive. The sc1 project has also been successfully completed and achieved unprecedented success. The next step is for Dongchen to form a competitive team. He does not need to worry too much. He only needs to do two things well.
One thing is to find a professional team manager who is good enough. The other thing is to provide enough cash so that the manager can confidently and boldly build Dongchen's team.
But just when Zhang Wenhao thought he could take a vacation, Director Liu came to his door.
Moreover, Director Liu’s arrival this time was quite unusual. He was accompanied by four tall and strong men wearing suits and black sunglasses. It was obvious at a glance that these four men were definitely very skilled, and Director Liu also had a hand in his hand.
This portable metal box requires two keys to be opened at the same time. When Zhang Wenhao saw it for the first time, he thought it was the legendary nuclear weapons terminal carried by the presidents of the United States and Russia.
Zhang Wenhao invited Director Liu to talk in the study room upstairs. Among these four big men, two were guarding the stairs in the duplex building and two were guarding the door of the study. They were all on guard and alert.
Zhang Wenhao and Director Liu sat across from each other and couldn't help but curiously asked: "What is going on today? How did it lead to such a big battle?"
Officer Liu smiled slightly and said: "I came today with an extremely important confidential document." As he said that, he put the box in his hand on the coffee table. He went out and called a tall man in, and the man came in.
After entering 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 Director Liu, turned around and walked out.
After he went out, Officer Liu took out a key and opened the other lock. Then he opened the metal box, took out a sealed file bag, and said to Zhang Wenhao with a serious face:
"There is a document here, please take a look at it first."
Zhang Wenhao took the file bag and opened it, and was shocked to find that it was actually a commissioned processing document.
The commissioned processing did not surprise Zhang Wenhao. What surprised Zhang Wenhao the most was that this letter of authorization actually entrusted Dongchen to build three nuclear submarine propellers in accordance with the requirements provided by the military.
This shocked Zhang Wenhao. He exclaimed and asked: "Director Liu, the senior management really wants Dongchen to handle this project?"
Director Liu nodded and explained: "This project is already mature in the hands of the military. The three candidate designs all use seven-blade propeller designs. The three propellers have the best performance in terms of propulsion speed, noise level and resistance level.
Each has subtle differences. The military has currently conducted experiments on these three designs, and the results are not very ideal. Moreover, the military's high-precision processing capabilities are much inferior to Dongchen's. Therefore, the project's
The person in charge hopes that Dongchen can rework these three design plans, and then the military will conduct re-testing."
Zhang Wenhao smiled slightly and thought to himself: The most important part of a submarine can be said to be the propeller, because the propeller is the last link in the power conversion of the entire submarine, and it is also the most critical relief. Whether it is nuclear power or diesel-electric power, it must ultimately pass through the propeller.
To form thrust, for sonar detection, the biggest source of noise for submarines in the water is also the propeller. The aerodynamic shape of the propeller not only determines the noise during operation, but also determines the maximum utilization of power. It can be said to be extremely high-end
In terms of national defense technology, as far as strategic nuclear submarines are concerned, the three most critical parts are, in addition to nuclear reactors and submarine-launched missiles, the propeller. Therefore, developed countries have always classified the shape of submarine propellers as top secret.
Immediately, Director Liu took out a special USB flash drive and an ultra-thin laptop from the box, handed the USB flash drive to Zhang Wenhao, and said, "All the detailed data is here. If you understand,
You can take a look first."
Zhang Wenhao nodded. Just as he was about to take his computer, Officer Liu hurriedly said: "Don't take the computer. Use my computer first. This computer does not have the function of connecting to the Internet at all. It is safer."
Zhang Wenhao smiled helplessly and said: "You should think of this thing as top secret. It is indeed of great significance. But as far as our current situation is concerned, those with nuclear submarines are better than us. Those without nuclear submarines have taken us.
This information is not very useful. In terms of propeller manufacturing technology, the United States, Japan, Russia, Britain, France and Germany are much better than us."
Although he said it like a joke, Zhang Wenhao still took advantage of Director Liu's laptop. After turning it on, Director Liu inserted the USB flash drive and first scanned the fingerprint at the end of the USB flash drive. Then he entered a fingerprint on the computer.
In the security software, I entered a long and complicated password and then opened the file in the USB flash drive.
Zhang Wenhao took a rough look at a few detailed drawings. He found that these three designs were all seven-leaf designs. According to the information in the super learning system, the top manufacturing technology today is eight-leaf or nine-leaf, and the number in active use in the United States is
The most Ohio-class strategic nuclear submarines use an eight-blade propeller design. The latest new model that is about to be finalized should already use a nine-blade design.
Zhang Wenhao asked in surprise: "Why does our latest nuclear submarine still use a seven-bladed design? Isn't this a bit outdated? At least it needs eight blades, right?"
Director Liu smiled helplessly: "This thing is not that simple. It doesn't mean eight leaves are eight leaves. As for the current seven-leaf design, we have spent a lot of manpower and material resources, calculating again and again, manufacturing again and again, and every time.
Various data were tested in the launch test. The size, thickness and angle of each propeller blade are slightly changed, and the results may be heaven and earth. Especially in the tilt angle, if there is a deviation of 0.1 degrees, the noise will be louder.
Many, the seven-leaf design is relatively mature. We have tried the eight-leaf design many times, but until now, no design can come close to the current seven-leaf design. Therefore, we can only temporarily choose the seven-leaf design."
Zhang Wenhao sighed softly and said: "It's really not that difficult. Building a propeller has such a big problem."
"Isn't it?" Officer Liu also looked helpless and said, "Look, this submarine propeller is very different from the propeller of a surface ship. The propeller of a surface ship does not need to be designed and manufactured with so much effort. It is noisier.
It doesn't matter, anyway, the noise of surface ships is not a big problem at all. Even if the thrust utilization rate is slightly lower, it doesn't matter. Surface ships are large in size and have large space. The engines can make up for the shortcomings in the propellers. However, submarines are different.
Ah, the space itself is very precious, the power configuration has been maximized, the resistance encountered when in the water is also large, and the speed is slow. The most terrible thing is that the key issue for the submarine to maintain its survivability is the amount of noise. In this way
, Submarine's requirements for propellers are too high. It can be said that wherever propellers are used in the world, submarine propellers have the highest manufacturing technology and the highest technological content."
As he said that, Officer Liu added: "We also know that Dongchen's manufacturing technology is very strong. Dongchen must be able to process nine-blade and eleven-blade propellers from Western countries. However, we don't have the drawings. This is the biggest problem."
Regarding the problem, we have been tinkering with the seven-blade propeller technology for 20 years, and finally we finally mastered it after buying the Russian Kilo-class."
Zhang Wenhao nodded, thinking that with Dongchen's high-precision processing capabilities and the information in the super learning system, Dongchen is fully capable of manufacturing the top-notch eleven-blade large-side-skew propeller, and the drawings that have troubled the military
Problems are not a problem at all here to Zhang Wenhao...
Thinking of this, Zhang Wenhao said: "Director Liu, please tell the leaders on my behalf that Dongchen will not produce the old and imperfect seven-blade propeller according to this set of drawings. I will apply to the team and try to make it possible.
With better technology, I also guarantee that the propellers produced by Dongchen will definitely be better than those designed by the military."
Director Liu was so shocked that he couldn't speak. After a while, he murmured: "Isn't it right? Your team has also mastered the manufacturing technology of submarine propellers?"
Zhang Wenhao smiled slightly and said noncommittally: "I'll ask for advice. Although I'm not sure, I don't think the problem is big."
Director Liu knew that Zhang Wenhao rarely or almost never said anything uncertain. Hearing what Zhang Wenhao said, he was pleasantly surprised, but also surprised: What kind of existence is the team behind Zhang Wenhao? They can build the best cars.
The best materials, and now, they even master the core military technology. This seems too difficult to understand, right?
At this time, Zhang Wenhao spoke again: "The machine tool equipment of Dongchen machining center can achieve a maximum processing diameter of about ten meters. However, the biggest problem at present is that Dongchen still lacks professional supporting equipment, such as hoisting and fixing equipment for large propellers.
, I need to trouble you with these."
Officer Liu nodded and said: "These are all small matters and can be solved within a day."
Zhang Wenhao asked again: "What about the material? Still using No. 036 special copper alloy?"
Director Liu said: "Yes, among the material technologies we currently have, this is the only material that is most suitable for manufacturing submarine propellers. Copper alloy will not rust, is more resistant to corrosion on the seabed, and can withstand bubbles generated during propulsion.
Corrosion, and among all copper alloy materials, No. 036 special copper alloy has the best performance."
Zhang Wenhao nodded and smiled, and said: "According to the size requirements above, the tonnage of the new submarine should be at least 9,000 or 10,000 tons, right?"
Director Liu laughed and said: "Even you are half an expert, Comrade Zhang. Although it is difficult to reveal too much details, your guess is correct. It is indeed more than 10,000 tons. If Dongchen's technology and processing capabilities are really
If the performance is very good, then the military will definitely entrust Dongchen to produce propellers for low-tonnage conventional submarines."
With that said, Officer Liu asked again: "You have a deep knowledge of materials. Do you have a more suitable copper alloy for making this kind of propeller?"
Zhang Wenhao said with a smile: "It doesn't mean much. No matter how strong the copper alloy is, it cannot transcend the category of its own copper alloy. In terms of strength, it should be a steel alloy; in terms of lightness, titanium alloy; in terms of corrosion resistance, the alloy material is still
It is not as good as high-end epoxy resin, but the latter is only suitable for surface ships now. For submarines, the technology is still a bit immature. The biggest problem at present is the problem of its own design and manufacturing process. It is not possible to use No. 036 copper alloy.
The question is, as for epoxy resin, if Dongchen gets involved in this industry in the future and has more advanced products, it can naturally be upgraded."
"Yes." Officer Liu nodded and smiled, and said: "Then I'll leave it to you. I will prepare the corresponding auxiliary equipment and materials in the next two days, and they will be shipped to Jiangcheng by then. The military's
The commissioned production order also clearly states that each of these three designs requires two finished products, which must meet the military’s 1-micron accuracy requirement.”
At present, the best domestic manufacturing process has an accuracy of 0.025 millimeters, which is 25 microns, while Dongchen's manufacturing accuracy has reached 0.001 microns. The 1 micron accuracy required by the military is very easy for Dongchen.
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