Chapter 621

In the 10th project, Tengfei group is mainly responsible for the manufacturing of the 16th, 17th and 18th fuselage sections, and the supporting suppliers of the vertical tail rudder, ventral fin and emergency ground power auxiliary unit (GPU).

Don't underestimate these three fuselage segments, which are the most critical part of the No. 10 project.

On the second-generation aircraft, although this part is important, the focus is only on the single structural load-bearing, and the manufacturing requirements are relatively simple.

Project 10 undertakes the research and development project of the third generation domestic fighter. Compared with the second generation fighter, the technology is greatly improved. The whole aircraft adopts static instability technology, which makes it necessary to use the fly by wire control system to improve the flight performance of the aircraft. In addition, the aerodynamic layout of the aircraft must also be greatly improved.

One of them is the use of wing body fusion technology.

The 16th, 17th and 18th fuselage segments undertaken by Tengfei group are the key segments of wing body fusion. Therefore, in these three segments, not only the super bearing structure is needed, but also the internal frame and external skin must be extended with special-shaped curved surface for aerodynamic needs.

This requires that in some parts, the traditional riveting process is no longer applicable, must use high-precision welding process to meet the requirements.

Several times across the country, only Tengfei group can undertake the processing capacity of electron beam welding for 7-meter-long large segmented parts. Coupled with its profound knowledge in chemical milling, the No. 10 project team finally handed over these three most important fuselage segments to Tengfei group for production.

For Tengfei group, it is indeed under pressure to undertake the production of the important fuselage sections of the No.10 project. After all, it is an important part of the third generation fighter. Tengfei group has never seen it before.

After all, the 16th, 17th and 18th fuselage segments of the 10th project can actually be regarded as the central wing box segment of the third generation domestic fighter.

Tengfei group has never built a fighter plane, but the central wing box Tengfei group is very familiar with it. Not to mention that other tm-9 aircraft can be mass produced, the most important thing is that Tengfei group has broken through the production process of the central wing box.

Of course, the central wing box of the tm-9 aircraft is still small. After all, it's just a small aircraft with a take-off weight of less than 5 tons, even if the central wing box is still there.

What really reflects the achievements of Tengfei group in this aspect is the central wing box on the advanced light transport plane that is undergoing static test, which is 6.4 meters long, 3.2 meters wide and 1.1 meters high.

Tengfei group is just gnawing this hard bone, which can make the advanced light transport aircraft have greater flexibility in the design and selection of airfoil, engine and fuselage, and lay a solid foundation for many sub models derived in the future, so as to build a common platform for civil and military use.

Because of this, it is not difficult for Tengfei group to produce three fuselage segments with central wing box for project 10.

Of course, apart from the head of the headquarters and other core heads, few people know about these important matters. However, even those who know about the important production work undertaken by Tengfei group are attracted by Liu Chun's confident words at this moment.

"I don't know if other countries in the world have applied other integrated film cooling hole processing technologies for turbine blades, but I dare to say that no matter what advanced processing methods are available abroad, our nb-711 electrochemical hole processing equipment of Tengfei group will not be inferior to them.

Because this process is applied to our turbine blades, the yield has increased from 32.4% to 85.7% now, and the performance is surprisingly good, otherwise it is impossible to increase the temperature in front of the turbine from 986 ℃ to 1228 ℃

Liu Chun's words are more powerful, and his fat face is shaking. It seems that the long-standing emotion will explode at this moment. The leaders around him are also infected by Liu Chun's passionate words, and they nod their heads in surprise and comfort.

It has been the dream of every Chinese for more than 100 years to overtake at corners and keep pace with the world's advanced level. Especially these leading cadres in the army are looking forward to the domestic industrial sector working hard to catch up with the world's advanced level as soon as possible and adding a more solid backbone to the modernization of national defense.

In the past, although they had a firm belief, they felt that it would take 20 or 30 years to achieve some results in the face of the huge technological gap abroad. However, when they saw Tengfei group using nb-711 electrochemical hole processing equipment to overtake, they immediately felt that the domestic high-end technology was not as weak as they thought. As long as they were willing to work hard, they could not only catch up with it, but also surpass it It's not impossible.

Of course, if they are excited, they will naturally have a cool head. Anyway, they just look through the glass door and listen to Liu Chun's passionate talk, but they don't see any real products. So they wait for Liu Chun to stop, and they are ready to ask this question.

But before these people could speak, a beep was suddenly heard in the glass door. Immediately, people saw a small rail truck loaded with encapsulated turbine blades start slowly from the factory building. When it reached the glass door, an iron gate behind it fell, and then the glass door opened.The minivan flashed the orange light and drove steadily and rapidly along the track in the passage in the eyes of people's curiosity and amazement.

"Fully automatic?"

"Where is this going?"

"To the workshop we just visited?"

……

Seeing such an automated mode of transportation, all the leaders and leaders present at the scene were wide eyed. It's not uncommon for other factories to see such an automated mode of transportation.

Even the head of the headquarters, whose face was calm, had a slightly different look on his face.

"This is the automatic rail transportation system of our group. Around the No.0 general assembly workshop, the surrounding four subordinate workshops and supporting workshops all use similar tracks to connect with each other, and use this kind of driverless rail car to transport materials and finished products in the workshop, greatly improving our production efficiency."

Liu Chun smiles and introduces the automatic rail transport vehicle that just drove past.

"Is it a railway like operation?" A military leader asked.

Liu Chun nodded: "yes, we have learned from the operation mode of the railway department, using computers to carry out unified dispatching of transport vehicles, which leads to the present transport system."

"How many times a day can you get these automatic rail wagons to workshop 0?" This question is not the former army leader, but the former Air Force chief who questioned the lack of film cooling hole processing equipment behind the crowd. I don't know when he and other people have crowded in front of Liu Chun.

Liu Chun didn't care. He laughed: "about 400 trains a day?"

The head of the air force, who asked the question, was stunned and asked, "what's the annual output of your wd-30s turbofan engine?"

"Not much. There will be more than 400." Liu Chun has a bright smile.

"400 Also Not much? "

The head of the air force suddenly opened his eyes and raised his voice eight degrees with trembling. The whole person shook, and no one fell.