Chapter 952

On hearing this, Meng Qingguo immediately came to the spirit. In his opinion, Zhuang Jianye's words are probably bluffing.

It is necessary to know that the core of the face gear coaxial split torsion technology is to use the face gear with the diameter of 300 mm to 500 mm to replace the complex bearing gear set, so as to simplify the structure and reduce the weight of the helicopter main reducer.

However, it is not easy to get this kind of face gear.

It's not to say how difficult the material is. Generally, high strength titanium alloy is enough. The key is that the machining accuracy is very high.

After all, this kind of face gear plays an extraordinary role in the main reducer. It not only bears the high speed from the turboshaft engine, but also transmits it to the upper planetary gear set through the non orthogonal small bevel helical gear, so as to control the speed within a certain range.

Because of this, the meshing degree and clearance size of face gear and other matching gears have very strict requirements.

Therefore, the key of face gear coaxial split torsion technology is the machining accuracy of face gear itself.

According to the classification of gear accuracy in China, the minimum level should be 6. Generally, the accuracy of 4 to 5 levels should be achieved to meet the durable demand of helicopter main reducer.

Although the high-precision gear processing is complex, as a more traditional machining category, it is not impossible to do, but it takes a little longer and requires a little more manpower.

It's not nice to say that three or two eight level fitters can take out the face gear with accuracy of 5 even after grinding with a file for a few months.

The problem is that the comprehensive cost is so high that it is difficult to carry out mass production as a standard model.

This is also an important reason why Russia and Europe, both developed regions of Helicopter Research and development, know that the face gear coaxial split torsion technology has many advantages, but it is not immediately put into application.

There is no way. It takes an average of 22 experienced technical workers 15 days to produce a 300 mm diameter main reducer face gear in Russia.

Europe is better. It takes seven days to compress the 300 mm face gear to five skilled workers with machining equipment.

However, whether it takes 15 days for 22 experienced technicians or 7 days for 5 technicians, the cost of this kind of face gear is not affordable.

What's more, a helicopter's main reducer needs three to five such large-diameter face gears. In this case, the cost of one main reducer is almost four times that of the traditional reducer. That's all. The problem is that the production cycle has been lengthened by about three times. After all, the cost of one helicopter is almost equal to that of two American F-16s The price has gone up.

Is that still a helicopter? It's just that the helicopter is not good.

Of course, the United States is an exception in this respect, because Hughes and Sikorsky, the American helicopter giants, have developed a new gear grinding machine for face gear, so that an average skilled worker can produce 10 face gears of different specifications with a diameter of 300 mm to 500 mm a day.

The high efficiency is due to the friction between Europe and Russia.

If not, it is impossible for the Americans to apply this technology to the two helicopters, the long bow Apache and the Comanche. The so-called thing is that, like the F-22, it maintains its absolute advantage over one or two generations of the world in the field of armed helicopters. Only in this way can the Americans feel safe.

Europe and Russia, of course, are greedy. The intention to purchase is sent to the United States almost every month. However, the United States has listed it in the list of technologies that restrict exports. Let alone Russia, even European allies have no way to touch it.

Meng Qingguo, as a senior expert who has been dealing with helicopters for most of his life, naturally knows that Tengfei group can understand things that even Russia and Europe can't play?

As for Tengfei group's technology like that of the United States, Meng Qingguo didn't even think about it. How can it be that the United States, which is playing friction with Russia and Europe, can not catch up with Europe and Russia on the whole, and how can it catch up with the United States?

That is to say, Pakistan is a big wrongdoer. He was fooled by Zhuang Jianye's mouth and bought a large sum of money for the zhi-12pro with the main reducer of the face gear coaxial split torsion technology. Later, he went to the field workshop to see the truth and see if the domestic army leaders can buy it?

The price is too expensive. The production cycle is still long. When did the army choose such inefficient things?

With his mind fixed, Meng Qingguo said, "can you take us to have a look? To be honest, I'm curious about how the world's leading final drive core components are produced. "

"No problem!" Zhuang Jianye agreed very happily, and then reached out to the head of the headquarters and Meng Qingguo and motioned: "heads, this way, please."

Then he took a group of leaders to go through the general assembly workshop of zhi-12pro, then two machining workshops and a sheet metal workshop. Then he came to a factory and registered as usual. A group of leaders rushed in. Meng Qingguo, who was at the front of the factory, immediately opened his eyes and was ready to take a panoramic view of the face gear inefficiency of Tengfei group.As soon as he entered the door, his eyes were straight.

In the workshop, which covers an area of less than 2500 square meters, there are more than ten unified machine tools, with gray white facade, pure blue base and terminal PC controller flashing bright light, which highlights the huge nb-404 on the front.

With the clean ground, the bright space and the well-dressed workers, Meng Qingguo only felt that he was in the wrong place.

What about the fitter class?

So high precision face gear does not need high-level fitter team for grinding?

What about the measurement room?

Is it unnecessary to inspect and measure the machined face gear? Otherwise, how do you know the accuracy is up to standard?

What about the mold group?

The grinding wheel in gear processing has no real-time adjustment of die set. How to control the machining accuracy?

……

Meng Qingguo's mind is full of questions, but the fact tells him that this face gear processing workshop is really not fragmented. It's a dozen machine tools, plus about 40 workers. Half of them are responsible for the cost of packaging and transportation.

"You You Is it by these machine tools that face gears are machined I don't know how long after that, Meng Qingguo finally came back and looked at Zhuang Jianye.

"Nb-404 is right here..."

Zhuang Jianye didn't give a positive answer either. Instead, he motioned to the machine tool not far away, obviously letting Meng Qingguo and others see for themselves.

Meng Qingguo couldn't hold it any longer. He walked two steps to a nb-404 and looked in through the transparent observation window. His eyes widened as if he had seen some incredible supernatural phenomenon.

At the same time, a nearby army leader exclaimed: "this craft is so beautiful!"