Rebirth 99 to become a car giant.

Pan Jun hopes that Nanshan Group will produce more military products, or more products that can be used in the military industry.

In this regard, Venus Technology has actually never stopped.

While the outside world was still discussing the "island artifact", Cao Yang had already followed a group of executives from Nanshan Special Steel, Nanshan Equipment and Venus Technology to the heavy transport helicopter production factory to watch the newly finalized Official mass production of drive shafts.

In the past two years, Daystar Technology has been referring to the American Chinook helicopter to develop a flagship product of Daystar Technology.

Even though the Americans produced this helicopter decades ago.

At that time, China also obtained a prototype through Annan, but this prototype had stayed in China for half a century, and in the end there was no way to copy it.

When many polar bear products arrive in China, we can localize them and copy them.

Why can't this heavy transport helicopter handle it?

The core problem here focuses on the drive shaft.

Just a seemingly simple axis has become an insurmountable technical problem.

"Mr. Cao, since the transmission shaft of this transport helicopter is composed of seven sections, it not only has a huge torque, but is also accompanied by obvious vibrations."

“When we designed it, we needed the shaft to be lightweight while also ensuring its reliability.”

"This seemingly contradictory demand makes the road to replicating Chinook helicopters full of insurmountable technical difficulties."

"Venus Technology can handle this axis, which is definitely a very remarkable achievement."

Pan Jun also came to the scene with Cao Yang today.

As a representative of the relevant departments, he needs to know more about the history of the replica production of this helicopter.

Because of this, when he heard that Daystar Technology had solved the shaft problem, he had to come to the site to take a look.

“The core problem with driveshafts is that they have high torque and are very long.”

"In this case, how to find suitable materials and processes is the most difficult problem."

“The material must be selected not only to meet the torque and length requirements of the shaft, but also to provide durability and stability.”

"Fortunately, we at Nanshan Special Steel have accumulated a lot of experience in related special steels before. Otherwise, it would be really difficult to find suitable materials this time."

Xie Lingyun can be considered one of the protagonists today.

After all, one of the most important things about the drive shaft is whether the special steel meets the requirements.

"We have been working on it for decades and have not been able to develop it, but the United States has developed it so early."

"I simply doubt that the United States used alien technology at that time."

Pan Jun couldn't help but make a joke.

The technological level of that era was relatively low, and it was indeed very difficult to solve such a huge and complex problem.

But they managed to solve it, and you really have to admire it.

"The problem of imitation of drive shafts is not only a technical challenge, but also a great test of material science and process technology."

"Strict standards need to be met in design and manufacturing. This standard not only considers torque and length, but also involves the quality, durability, stability and other aspects of the shaft."

"How to find the right balance point in these aspects is a topic that everyone needs to continue to explore."

"In the past, China had many deficiencies in material science and process technology, making imitation work a large and complex system project."

"The situation is completely different now. Although the threshold is still very high, we can already achieve it."

“Even the drive shafts we produce now can be superior in terms of material performance and machining accuracy.”

Cao Yang understands technology, so he can naturally understand how difficult it is to design and produce the drive shaft in front of him.

As a rigid connection component that connects the front and rear propellers, it is the most technically demanding part of a heavy transport helicopter.

This is somewhat inconsistent with many people's perceptions.

Everyone may always think that China is not good at helicopter engines, so it cannot produce heavy-duty helicopters.

Or it may be that there are deficiencies in the design of flight controls or propellers, which has led to the difficulty in producing related products.

In fact, those problems do exist, but relatively speaking they can be solved.

If that doesn't work, you can consider buying from Polar Bear.

But this drive shaft has troubled everyone for many years.

Now that it's finally solved, it's really significant.

"The length of this shaft is more than 20 meters. Not only must it transmit more than 3000 horsepower, but it must also prevent resonance during the transmission process."

"Back then, Polar Bear imitated this helicopter and produced it. However, due to material and design problems, the drive shaft resonated during the test flight of the aircraft, which almost caused the aircraft body to fall apart."

"The polar bear also gave up its imitation work after that."

Pan Jun half-jokingly added the story of what happened in Big Brother back then.

This shows that it’s not that China’s level is not good, but that the difficulty of this thing is too high, so no one else can do it except the United States.

"In order to produce this special drive shaft, our Nanshan Equipment specially developed and produced a large CNC milling machine for rough machining and finishing of the shape and key dimensions of the drive shaft."

“This CNC milling machine is five-axis linkage and can achieve complex chip paths and angles.”

"Then we also specially developed a special high-precision grinding machine for high-precision grinding of the drive shaft to ensure surface finish and dimensional accuracy."

"At the same time, because there is a deep hole structure inside the transmission shaft, we also developed a deep hole drilling machine for processing."

"As for other special machine tools, we also develop special machine tools and fixtures based on the specific structure and processing needs of the drive shaft."

"These thresholds alone are really not something that ordinary companies can handle."

For such a critical part, the requirements for processing equipment must be very high.

As the person in charge of Nanshan Equipment, Pan Jinxing must take this opportunity to showcase their efforts.

Fortunately, Nanshan Equipment already has a wide variety of products. Although more than a dozen processing equipment have been specially developed this time, most of the equipment is actually prototype products and only needs special production modifications.

Otherwise, the equipment investment alone would be an astronomical figure.

The market demand for heavy-duty transport helicopters is relatively small, and the amortization cost of equipment on each drive shaft will be very exaggerated.

You know, as the king in this field, the "Chinook" has been sold for half a century, and it has only sold more than a thousand.

The external selling price of this helicopter is more than 1 million US dollars.

The performance of similar products produced by Daystar Technology will definitely develop in a better direction, but the final price will definitely not be more expensive than those sold in the United States.