Chapter 989

You should know that Mou Guangying is not Xiaobai, but a senior aviation expert.

Because of this, the dialogue between Zhuang Jianye and Peng Chuan is very transparent in Mou Guangying's place, although it is foggy and can't be understood by others.

In addition, Peng Chuan clearly expressed that "Tengfei group has a better" self-confidence attitude.

Mou Guangying knows that Tengfei group has far more attainments in the field of aircraft large parts machining than the fledgling Daewoo Group of South Korea, and even Japan, which works as a OEM for Boeing, can't match him. Only such giants as Boeing of the United States and Airbus of Europe can compete with one of them.

Because Tengfei group is likely to master the integrated machining technology of large wing skin.

Get to the point!

First, it's large. How large is it?

According to European and American standards, a wing more than 10 meters is large. If it is a Boeing 747 or a C5 transport plane, which is nearly 20 meters, it is super large.

However, whether it is large or super large, if you want to process it as a whole, you need more equipment.

At least, the internal working surface should not be less than 25 meters, and the width should not be less than 6 meters. For this alone, the operating area of the working surface alone can reach 150 square meters.

If the peripheral partition, load-bearing layer of machine tool, slideway, operation system and other supporting components are included, the whole equipment will be a huge object covering an area of more than 300 square meters.

However, this is not the key, because the focus is another core, that is, integrated processing.

What is integration? To put it bluntly, it is to put the 10 meter long aluminum alloy wing skin blank on the processing equipment. After inputting the instructions according to the program, it doesn't need to care about anything. The equipment will process the three ton high-strength aviation aluminum alloy step by step into a skin with the thinnest part of only 0.5mm and the thickest part of no more than 3mm, and has all kinds of complex micro stiffeners and great strength The whole thing.

This requires that the processing equipment should not only be large, but also the rotating shaft and cutter head before processing should be extremely flexible, at least five axes, otherwise it will not be competent for such a complex processing process.

Not only that, the fixture also needs to be flexible, because the blank of wing skin is cut from three tons of aluminum bumps to only a few hundred kilograms of thin skin. During the process, it needs to be repeatedly cut and polished, which requires that the fixture should not be fixed, but should be adjusted according to the angle of the knife.

In other words, the traditional fixed fixture is not competent, and flexible fixture is needed to complete this kind of operation.

Flexible fixture is a new technology emerging in the aviation industry in recent years. At present, only the United States has been popularized, and Europeans are still working hard. Has Tengfei group made a breakthrough in this aspect?

For a moment, Mou Guangying only felt that the world was turning around. Was this still considered as a poor hotel for his IDF fighter R & D team?

There's no edge to this strong one, right?

Zhuang Jianye and Peng Chuan don't know what Mou Guangying thinks. Otherwise, they promise that they will be amused and laugh. Then they wave their hands to Mou Guangying with indifference and say with derision: "is a set of craft that will be eliminated in two years still strong? You've never seen anything really powerful

Yes, in Mou Guangying's eyes, this kind of aviation aluminum alloy integrated skin processing technology has been regarded as the top level of aircraft machining in the world.

In fact, it is.

Because of the particularity of the wing, the structural strength of the outer surface must be particularly high. At the same time, the overall weight should not be too large, otherwise the load and flight performance of the whole aircraft will be affected.

Because of this, since the 1970s, the aircraft wing outer surface skin has gradually adopted the integrated machining technology of large-scale blank, combined with chemical milling and EDM technology, so that the aircraft wing, especially the wing of large aircraft, can further reduce its weight while improving its structural strength.

The effect is the leap forward improvement of aircraft performance.

After all, this kind of integrated processing avoids the structural imbalance and overweight problems caused by the surface splicing of the wing skin before. This is why Zhuang Jianye would scoff at the 8-meter gantry milling machine, because if Korea uses this kind of gantry milling machine to process the wing skin, it must use the riveting technology to connect several sections of the wing skin.

Not to mention the others, the rivets connecting the skin segments alone will have to increase the weight by several kilograms.

The problem is that the wing skin has not only the upper surface, but also the lower surface, so the weight of rivets has to increase the weight of the wing by nearly 10 kg.

Two wings are 20 kilograms.

In addition, large structural beams, truss beams, body frames, oil tanks and other internal structural parts also can not be integrated processing, using rivets splicing, the overall calculation of the quality of bare rivets will be hundreds of kilograms more.

You should know that aircraft, especially large passenger aircraft, may have an irreversible impact on flight quality at a weight of one gram, let alone hundreds of kilograms.

This is why Zhuang Jianye shakes his head when he looks at Daewoo's equipment. Thanks to them, Daewoo is killed. Otherwise, even if Daewoo makes a big plane, Boeing and Airbus will have to press it on the ground.I can't help it. I'm two generations behind in production. It's just like using a spear to fight AK47. It's strange if I don't die.

Yes, you are right. Although the whole set of equipment in Daewoo machining workshop is advanced, it still lags behind the giants for two generations.

At the same time, it is also the root of Zhuang Jianye and Peng chuanruo's unbridled laughter when they know why Mou Guangying was shocked. The wing skin produced by aviation aluminum alloy integrated skin processing technology is indeed the mainstream of large aircraft wing manufacturing nowadays, but it will soon be replaced.

Because of the breakthrough of the new generation of carbon fiber composite materials and the rapid development of new weaving technology, it will replace the extremely thin aluminum alloy skin of large aircraft wings and become a new main material of wings in the near future.

How long will this be in the future?

The schedule given by the Materials Research Institute of Tengfei group is that before 2000, Tengfei group will build the first 15 meter long special equipment for manufacturing wing composite skin.

By then, the overall proportion of composite materials for large aircraft produced by Tengfei group will reach 35% to 48%, and it will further increase to 60% in the future.

How can Daewoo, who can't even understand the integrated processing and is still playing with splicing, be capable of Boeing and Airbus, who have begun to cultivate the new technology of composite materials?

Think about it. It's all jokes.

Fortunately, Mou Guangying doesn't know how deep the water is, otherwise he will be trampled by Zhuang Jianye and Peng Chuan.

"Oh, Mr. Mou, since you want to join the Tengfei group, do you want to be famous?" When Mou Guangying was shocked, Peng Chuan suddenly said.

Mou Guangying was surprised, and Peng Chuan explained to him the flat management system of Tengfei group. Hearing this, Mou Guangying nodded: "no problem. I'll go back and think about it. Er By the way, Mr. Peng and Mr. Zhuang's flower name is NB. What's your flower name? "

Peng Chuan's hair was in a mess, and dandruff came down, and two words came out: "stallion!"