"When we designed the program, we took into account the elastic retraction of the steel plate. Therefore, we designed a certain processing margin. We also studied a lot of steel parameters and refined these parameters according to the differences of each steel plate."

Hu Yong's face was also very excited: "Now it seems that our design is perfect."

"Well, not bad." Qin Tao is also very satisfied. This is only the first experiment, and it has achieved such satisfactory results, which shows that after these years of hard work, our CNC designers have become more and more experienced.

.

There are already independent multi-axis CNC machine tools in China, and now this kind of bending machine has begun to enter the CNC era!

"This is definitely a revolution in our shipbuilding industry!" Zhao Changshui also sighed there. Although he has become the director of the machinery factory here, after all, he is still a shipbuilder. At this time, Zhao Changshui is more optimistic about this machine.

Qin Tao nodded, and then said: "Yes, it is a revolution in the shipbuilding industry. However, this machine has just been developed, and there must be many imperfections. After the successful experiment of this prototype, we will first build one

A large plate bending machine with an area of ​​​​an ordinary steel plate is placed in our Mingzhou Shipyard. After repeated use, various problems were reported and then modified."

Zhao Changshui nodded: "Okay."

This is the only way for a new machine to go through. It must be tried out first and all possible problems that may arise must be solved. Of course, he didn't know that Qin Tao had another meaning when he said this.

"At the same time, our project must be highly confidential and no secrets can be leaked."

With every innovation in technology, there will be winners and some will be eliminated.

The bending machine invented by Mingzhou Group will greatly increase the speed of shipbuilding, reduce shipbuilding costs, and gain an advantage in competition. At the same time, such a bending machine will also arouse the covetousness of many peers.

Other shipyards also want to improve the efficiency of bending plates and free themselves from heavy manual labor. However, they are unable to make similar products. Now that they have made them, they have to guard against being copied by them.

past.

So, in the first few years, be sure to keep it a secret!

Even brother factories cannot obtain this product. This is an important product that Mingzhou Shipyard has developed and is popular all over the world. In a few years, it will not be too late to promote it to brother units. In the past few years, we have first

try out!

This reason is also very sufficient and others cannot say anything.

"Mr. Qin, we can be stationed in Mingzhou. If there are any problems, we will deal with them as soon as possible." Hu Yong also began to express his position.

"This should not be used. If there are any problems, we will contact you. Now that this bending machine has been successful, you should continue to work hard and continue to build more advanced shipbuilding equipment."

Keep up the good work?

Hu Yong's eyes lit up: "Mr. Qin, please speak!"

"Our domestic CNC shipbuilding equipment still lacks professional plate rolling machines." Qin Tao introduced: "Next, we need to overcome the technical difficulties of the three-roller plate rolling machine. This kind of plate rolling machine must be wide-body.

Steel plates with a width of more than five meters can be processed by rolling the steel plates out of a steel cylinder."

Three-roller plate bending machine!

This is equipment that Mingzhou Shipyard and even domestic shipyards still lack. It is specially designed for special aircraft and is used to build submarines!

If you want a submarine to dive into very deep water, you need a high-strength steel plate that is rolled directly into a cylinder. Therefore, it requires a lot of pressure. For example, in later generations, the largest three-roller plate rolling machine was used to process it.

At that time, the pressure was as high as 8160 tons!

The greater the pressure of this plate rolling machine, the stronger the steel plate that can be processed, and the larger the diameter will be.

Domestic submarines can only build a few thousand tons because the bending machine is not powerful and the processing diameter is too small. Although Lao Maozi's submarine has an underwater displacement of tens of thousands of tons, it uses a double-shell structure with a pressure-resistant shell inside.

It's not big, but it's because their plate bending machine is not powerful.

At present, the most advanced technology of plate rolling machines in the world is in Sweden. Other countries that manufacture submarines all import plate rolling machines from Sweden.

The Kangaroo Country also wanted to build submarines, but they did not have such a plate rolling machine, so they transported rolled steel tubes directly from the United States. As a result, there was a problem during transportation, and several were scrapped. The welded submarines also failed.

It cannot meet the design specifications. The error of this thing cannot exceed two millimeters!

A new generation of nuclear submarines is being built in the country, and the nuclear submarines designed by the Mingzhou Group are even more transcendent. With the current second-hand bending machine obtained from Lao Maozi, we can only build conventional submarines such as the Kilo class.

There is no way to build a nuclear submarine with a larger displacement.

Therefore, after having the plate bending machine, the next difficulty to overcome is the plate rolling machine!

"Mr. Qin, are there any other technical requirements?" Hu Yong asked.

"The maximum pressure of this three-roller plate bending machine is more than 8,000 tons, and the diameter of the steel cylinder processed can reach a maximum of 13.5 meters."

Hu Yong nodded, as if he knew something: "In this case, we can build a submarine with a displacement of 20,000 tons, and we don't need a turtle back."

The displacement of attack nuclear submarines is not very large, and few exceed 10,000 tons. However, the displacement of ballistic missile nuclear submarines is different. In order to be able to carry a large number of missiles, the displacement of such submarines will be rapidly expanded.

If the displacement is large, the casing needs to be large. If the casing is large, the diameter must be large. What should I do with a plate bending machine that is not that big?

Then just turtle it up.

The emergence of the turtle's back was a helpless choice for early ballistic missile nuclear submarines. The ballistic missiles that needed to be launched were large and long, exceeding the diameter of the pressure hull. There was no other way but to protrude.

The turtle's back of the Yankee's Ohio-class nuclear submarine is so small that it is almost invisible. It blends perfectly with the hull of the submarine. That is because it has an underwater displacement of 18,000 tons.

What about domestic ones?

This chapter is not finished yet, please click on the next page to continue reading the exciting content! Although the third design department of Mingzhou Group has only designed nuclear-powered attack submarines so far, of course, in the future, ballistic missile nuclear submarines will also be involved, so

, the displacement will definitely increase, and the corresponding plate bending machine must be owned. Even if it costs billions, this important equipment of the country must be manufactured!

After the inspection of the bending machine project was completed, it was already noon. After having dinner in the machinery factory, Qin Tao did not leave, and then inspected the progress of the lift fan.

This project is directly related to the J-31A project, and Qin Tao attaches great importance to it.

Wang Jinbao introduced to Qin Tao with excitement: "Mr. Qin, after our many contacts, we finally found a domestic manufacturer specializing in aircraft composite brake pads. We use the materials they produce as clutches. After testing, they can meet ten requirements.

About twice the service life!”

For an aircraft, it is absolutely unbearable to have to replace the clutch five times including takeoff and landing. However, for the R&D personnel, this is already a huge breakthrough!

After all, they couldn't solve this problem at all before, not even once. Every time they were combined and separated, they were almost burned instantly.

Qin Tao nodded: "The next step is to optimize your control program and make the combination and separation smoother, which can increase the service life to about twenty times. Then we will wait for the continued breakthrough of domestic friction materials."

When I first saw the French Mirage 2000 braking directly without deploying a drag chute, the country was greatly stimulated and began to develop composite brake pads. Now, I don’t know whether they can be used on aircraft. At least they are provided to our own side.

A convenience.

Of course, there is no best, only better, and they still have a lot of room for development.

"Now that these projects have been completed, it means that we can match the turbofan 15 engine." Qin Tao said: "This is really good news. Next, we need to publicly display our vertical

The takeoff and landing power system is on!”

On the bending machine project, Qin Tao is very cautious and implements strict confidentiality measures, fearing that others will learn from it. As for the vertical take-off and landing power, he wants to publicly display it. This is of course to annihilate the 31A

Wave the flag and strive to get more user investment.

"Of course. Next, our project can be placed in the Aerodynamic Research Institute. They have a special test bed and a turbofan 15 engine. We need to conduct matching experiments with them."

"Of course." Qin Tao nodded: "This is a phased result."

Qin Tao highly affirmed the progress of this project.

This project also has many purposes, one of which is to take the road of the Yankees and make the Yankees have no way to go!

Across the ocean, what's going on with the development of the X-32 and X-35?

Qin Tao was a little curious.

Boeing Company.

"This is the speed of our Boeing! We are far behind our competitors. Even if they laugh at our aircraft as flying toads, we are definitely the first to fly into the sky!"

While other competitors are still working on detailed designs, Boeing's X-32 prototype has been built!

There are many reasons for this. For example, this project of Boeing Company is not a new one. The AVX-70 in the ASTOVL project has already laid the foundation for them. Later, when bidding, the project was just modified.

That's all.

Therefore, they make the fastest progress.

Now, looking at the prototype aircraft that is about to undergo test flight on the runway, everyone is very happy.

The test pilot held his helmet and strode toward the aircraft. Under the gaze of countless people, the aircraft started, taxied, and climbed.

For the first test flight, they did not use a high-end vertical take-off and landing, but taxied to take off like an ordinary fighter jet. After all, their aircraft was out, but the improved engine specially developed by Pratt & Whitney for this project was not yet available.

appeared, they could only use the F-119 engine on the F-22 fighter jet, which did not have enough thrust to provide the power required for vertical takeoff and landing.

"How come its rolling distance is so long?" An Air Force officer present frowned.

"Isn't its low-altitude performance as bad as the F4D?"

Many people have frowned, and the people at Boeing are already sweating profusely. The first big problem of the flying toad has begun to trouble them!

The Flying Toad uses a tailless delta wing structure, which is Dassault's signature layout plan: when the engine is not powerful, this layout can achieve good lift, climb rate, and high-speed advantages.

For the flying toad with a big mouth, this layout can make up for many of its shortcomings. Moreover, the thick delta wing can also store a large amount of fuel. Almost all of the planned nine tons of internal fuel will be stored in the wing.

of.

This even resulted in the wings being unable to fold.

But another trouble with the tailless delta wing has emerged: poor low-altitude performance and poor takeoff and landing characteristics!

This prototype was the first to fly, and its huge flaws have been exposed. Even if it uses advanced fly-by-wire operations, it cannot save its own flaws.
To be continued...