You must know that Mu Guangying is not a novice, but a senior aviation expert.

Because of this, although the conversation between Zhuang Jianye and Peng Chuan was cloudy and foggy, and it was not understandable to others at all, it was very transparent here in Mu Guangying.

Coupled with Peng Chuan's self-confident attitude of "Tengfei Group has a better than this" clearly expressed later.

Even if Mu Guangying shows off his head, he knows that the Tengfei Group's attainments in the field of machining of large aircraft parts far exceed that of the fledgling South Korean Daewoo Group, and even Japan, which does OEM for Boeing in the United States, cannot match it, and only giants such as Boeing in the United States and Airbus in Europe can compete with them.

Because it is very likely that Tengfei Group has mastered the integrated machining technology of the whole piece of large-scale wing skin.

Make a point!

First of all, how big is large?

According to European and American standards, a wing of more than 10 meters is considered large, and if it is a Boeing 747 or a C5 transport aircraft of nearly 20 meters, it is super large.

However, whether it is large or very large, if you want to process the whole piece in one piece, the equipment required is naturally larger.

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

If you count the peripheral partitions, the load-bearing layer of the machine tool, the slideway, the running system and so on, the whole equipment will be a behemoth covering an area of more than 300 square meters.

However, this is not the point, because the focus is on another core, and that is integrated machining.

What is the integration, to put it bluntly, is to put the ten-meter-long aluminum alloy wing skin blank on the processing equipment, according to the program input instructions, do not care about anything, the equipment itself will step by step will be three-ton high-strength aviation aluminum alloy processing into the thinnest point of only 0.5mm, the thickest is not more than 3mm, and has all kinds of complex and subtle stiffeners, the strength of the whole skin.

This requires that the processing equipment should not only be large, but also the shaft and cutter head in the front stage of processing should be extremely flexible, at least five axes, otherwise it will not be able to handle such a complex machining process.

Not only that, but also need to be flexible in the fixture, because the blank of the wing skin can be cut from a three-ton aluminum lump to a thin skin weighing only hundreds of kilograms, and the process needs to be repeatedly cut and polished, which requires the fixture to not be fixed in stone, but needs to make appropriate adjustments according to the angle of the knife and the size of the knife.

In other words, traditional fixed fixtures simply can't do the job? Flexible grippers are required for this type of operation.

And the flexible fixture is a new technology that has just emerged in the field of aviation industry in recent years? At the moment only the United States has gained popularity, and the Europeans are still struggling? Could it be that Tengfei Group has also made a breakthrough in this regard?

Time? Mu Guangying only felt that the world was spinning, was this still considered a poor toss? Is it only worthy of being a passing hotel for their IDF fighter R&D team to temporarily stay?

It's a bit boundless, isn't it?

Thanks to Zhuang Jianye and Peng Chuan, they didn't know Mu Guangying's thoughts, otherwise the two of them would be amused to laugh? Then waved his hand at Mu Guangying nonchalantly? Teasingly: "A set of processes that will be eliminated in two years is still called strong? Then have you ever seen what is really powerful." ”

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

In fact, it is.

Due to the peculiarities of the wing, the structural strength of the outer surface must be particularly high? Meanwhile? 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 70s, the outer surface of the aircraft wing skin has gradually adopted the integrated integral machining technology of large blanks, combined with chemical milling and EDM technology? So that the wing of an aircraft, especially the wing of a large aircraft, increases its structural strength at the same time? The weight is further reduced.

The result is a leap forward in aircraft performance.

After all, this kind of integrated processing avoids the structural imbalance and overweight problems caused by the previous wing skin surface splicing, which is why Zhuang Jianye will scoff when he sees the 8-meter gantry milling? Because if South Korea uses this kind of small gantry milling to process the wing skin, it is necessary to use the process of riveting the wing to connect several sections of the wing skin.

Don't say anything else? Just the rivets that connect the skin segments have to increase the weight by several kilograms.

The question is, isn't the wing skin just the upper surface? And the lower surface? So the weight of the rivets had to add almost ten kilograms to the mass of the wing.

Two wings are twenty kilograms.

In addition, the internal structural parts such as large structural beams, truss beams, body frames, fuel tanks, etc. can not be integrated processing, and the quality of the rivets will be hundreds of kilograms more when rivets are spliced.

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

This is also why Zhuang Jianye shook his head when he looked at Daewoo's equipment, thanks to them killing Daewoo, otherwise even if Daewoo made a big plane, it would be pressed to the ground by Boeing and Airbus for all kinds of friction.

There is no way, it is two generations behind in the production process, it is like using a spear to fight someone AK47 to the death, it is strange if you don't die.

Yes, you read that right, although the entire set of equipment in the Daewoo machine shop is advanced, it is still two generations behind the giants.

At the same time, it is also the root knot that Zhuang Jianye and Peng Chuan will laugh unscrupulously if they learn the reason for Mu Guangying's shock, and the wing skin produced by the integrated processing technology of aviation aluminum alloy is indeed the mainstream of today's large aircraft wing manufacturing, but it will soon be replaced.

Because of the breakthrough of a 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 in the near future and become the new wing main material.

How long will this be in the future?

The timetable given by the Ascendas Materials Research Institute is that by 2000, Ascendas will build the first 15-meter-long wing composite skin production facility.

At that time, the overall proportion of composite materials for large aircraft produced by Ascendas Group will reach 35% to 48%, and it will further increase to 60% in the future.

Daewoo, who can't even understand integrated processing and is still playing with splicing, can do Boeing and Airbus, which have begun to deepen the new process of composite materials?

It's a joke to think about.

Fortunately, Mu Guangying didn't know how deep the water was, otherwise the little self-esteem on his body would definitely be trampled on by Zhuang Jianye and Peng Chuan.

"Oh, Mr. Mu, since you want to join the Tengfei Group, do you want to give it a nickname?" Just when Mu Guangying was shocked in his heart, Peng Chuan suddenly spoke.

Mu Guangying was surprised, Peng Chuan explained to him the flat management system of Tengfei Group, Mu Guangying's eyes lit up when he heard this, and nodded: "No problem, I'll go back and think about it, eh...... By the way, Mr. Peng, Mr. Zhuang's nickname is NB, what is your nickname?"

Peng Chuan stripped his messy hair, his dandruff fell, and he proudly popped out two words: "Stallion!"