As soon as he heard this, Meng Qingguo immediately came to his senses, in his opinion, Zhuang Jianye's words were very likely to be bluffing.

It is important to know that the core of face gear coaxial split-torsion technology is to use face gears with a diameter of 300mm to 500mm to replace complex bearing gear sets, so as to simplify the structure of the helicopter final drive and reduce weight.

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

It's not that the material is so difficult, the general high-strength titanium alloy is enough, the key is that the processing accuracy is very high.

After all, this kind of face gear plays an unusual role in the final reducer, which not only has to bear the high speed from the turboshaft engine, but also transmits it to the planetary gear set of the upper layer through the non-orthogonal bevel angle helical gear, so as to control the speed within a certain range.

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

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

According to the domestic gear accuracy level, the minimum should also reach 6 levels, and under normal circumstances, it must be able to have 4 to 5 levels of accuracy to meet the durability needs of the helicopter final deceleration.

Although high-precision gear machining is complex, as a more traditional machining category, it is not impossible to do, it is nothing more than taking a little longer and requiring a little more labor.

To put it mildly, three or two eighth-level fitters can come up with a face gear with an accuracy of 5 after grinding with a file for a few months.

The problem is that the overall cost is high, and it is difficult to produce it in large quantities 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 benefits, but it is not immediately put into application.

No way, it takes an average of 22 experienced technicians and 15 days to produce a final reducer face gear with a diameter of 300mm in Russia.

Europe is better, the use of machining equipment to match, can compress the 300mm face gear to 5 skilled workers in 7 days.

But whether it takes 15 days for 22 experienced skilled workers or 7 days for 5 skilled workers, the high cost of this kind of face gear is simply not affordable for ordinary people.

What's more, a set of helicopter main reducer should also have 3 to 5 such large-diameter surface gears, in this case, the cost of a final reducer is almost worth more than four times that of the traditional reducer, which is just that, the problem is that the production cycle has been stretched by about three times, and the cost of completing a helicopter is almost worth the purchase price of two American-made F-16.

Is that still a helicopter? It's not a helicopter at all.

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

The efficiency is so high that it is completely in line with the friction between Europe and Russia.

If this is not the case, it is impossible for the Americans to apply this technology to the two helicopters of Longbow Apache and Comanche, and the so-called is not the same as the F-22, maintaining absolute superiority over one or two generations of the world in the field of armed helicopters, so that the Americans feel safe.

Europe and Russia are naturally greedy, and the intention to purchase them will be sent to the United States almost every month, but the United States has included them in the list of technologies that are restricted from export, not to mention Russia, and even European allies have no way to touch them.

Meng Qingguo, as a senior expert who has dealt with helicopters for most of his life, naturally knows about this situation, and Tengfei Group can figure out what even Russia and Europe can't do?

As for saying that the Tengfei Group will have the same technology as the United States, Meng Qingguo didn't even think about it, how could it be possible, it was the United States, the United States that played friction according to the heads of Russia and Europe, and the Tengfei Group couldn't even catch up with Europe and Russia in general, so how could it catch up with the United States?

That is, Pakistan is wronged, and was fooled by Zhuang Jianye's mouth, and took a lot of money to buy a straight-12pro with face gear coaxial split-torsion technology main reducer, and then go to the field workshop to see the truth and see if the domestic army leaders buy it?

It's just that the price is too expensive, the production cycle is still long, when did the army choose such an inefficient thing?

With the idea in his heart set, Meng Qingguo said: "Then can you take us to have a look? To be honest, I am very curious about how the core components of this world-leading final reducer are produced. ”

"No problem!" Zhuang Jianye agreed very happily, and then stretched out his hand to the head of the headquarters and Meng Qingguo: "Chiefs, please come here." ”

Then he took a group of leaders through the assembly workshop of the straight-12pro, and then crossed two machining workshops and a sheet metal workshop, and then came to a workshop, registered and entered as usual, a group of leaders rushed in, and Meng Qingguo, who was in the front, immediately opened his eyes wide, ready to take a full view of the inefficient situation of the surface gear of Tengfei Group.

As a result, as soon as he entered the door, his eyes immediately straightened.

I saw that this workshop covering an area of only 2,500 square meters is scattered with more than ten unified machine tools, with an off-white façade, a pure blue base, and a terminal PC controller shining brightly, highlighting the huge NB-404 on the front.

With a neat floor, a bright space, and uniformly dressed workers, Meng Qingguo only felt that he was in the wrong place.

What about the fitter class?

So don't high-precision face gears need to be polished by high-level fitter teams?

What about the measuring room?

Doesn't the machined face gear need to be tested and measured? Otherwise, how can we know that the accuracy is up to standard?

What about mold sets?

There is no real-time adjustment of the grinding wheel in the gear processing process, how to control the machining accuracy?

......

Countless questions were like a barrage version in Meng Qingguo's mind, but the facts in front of him told him that there were really no bits and pieces in this gear processing workshop, and there were more than a dozen machine tools, plus more than 40 workers, half of whom were still responsible for the cost of packaging and transportation.

"You ...... You guys...... Is it by relying on these machine tools to process surface gears?" I don't know how long it took, Meng Qingguo finally came back to his senses and looked at Zhuang Jianye.

"NB-404 is here......"

Zhuang Jianye didn't answer positively, but gestured to the machine tool not far away, obviously letting Meng Qingguo and others see it for themselves.

Meng Qingguo couldn't hold back any longer, and hurriedly walked two steps to an NB-404, and looked in through the transparent observation window, and the whole person was as if he had seen some incredible supernatural phenomenon, and his eyes suddenly widened.

At the same time, a troop leader next to him exclaimed: "This craftsmanship is so beautiful!"