Chapter 201 requires a heavy-duty hydraulic press!
“Yes, the Three Gorges.”
Jin Gui nodded:
“According to the plan, the current first phase of 14 units will come from Fowey, Germany. Special, Siemens, General Electric of the United States, Alstom of France, and ABB of Switzerland will purchase them respectively. When the second batch is completed, they will start to consider localizing the digestion and absorption technology.”
“However, the factory still feels that this thing. We can't just think about waiting and relying on it. The relationship between Big Brother and us was very difficult in the past. In the end, it was not just the backer but everyone who depended on it, let alone these foreign companies now.
So we started trying to research some key technologies ourselves a few years ago. At first we just thought about doing pre-research, so that we can have some confidence when we bid for localization later. At least we won’t follow others when they play tricks. A fool doesn't know. "
"But as we continued to do it, we found that except for the bearing part, which has no technical reserves and needs to be imported, it seems that we can try to do the rest ourselves. It just so happened that the factory's efficiency in the past two years has been good. A sum of funding was approved to launch the project. "
After hearing this, Chang Haonan couldn't help but feel a little admiration:
"So that's it..."
Bearings, especially ball and roller bearings, are very important to Huaxia It is indeed a long-standing problem. When Northern Heavy Industries was developing large-size shield machines in the previous life, the main bearing was finally solved by the cooperation of several units including Northern Heavy Industries, the Institute of Metals of the Chinese Academy of Sciences, and Luoyang Xinqianglian.
Therefore, it was extremely difficult to make other parts of ultra-high-power hydropower units famous in the 1990s.
Jin Gui, who was sitting opposite, continued:
“So far, the overall progress is pretty good, but the two things just mentioned are really not something that we can solve alone. ”
Chang Haonan certainly knows that large forgings and machined parts are difficulties in the equipment manufacturing industry, but he is still prepared to listen to more specific opinions from industry insiders.
“Is this difficult?”
He knows how to bring up the following topics, not to mention that the person he is talking to is a person who has a strong desire to speak, so it doesn't take much trouble at all.
But this time, the other party did not give an immediate answer as he had done in the past few hours. Instead, he lowered his head and pondered for a while, so that Chang Haonan thought that this question was more sensitive.
“It is difficult, or rather, not entirely a difficult problem.”
Jin Gui unscrewed the lid of the thermos cup and took a sip:
“Since you are doing For airplanes, you should also understand that it is easiest to manufacture something of medium size. Whether you want to make it very large or very small, it is very difficult. For example, the Boeing 747 is definitely much more difficult to build than the Y-5. "
"The turbine end cover we are going to build, as well as the runner hub, the finished product is nearly a hundred tons in size. Especially the runner, because it has to directly bear the impact of water flow, the requirements for the strength of the hub are very high, and because When working in water, martensitic stainless steel must be used..."
"In short, it cannot be manufactured through repeated processing like a blacksmith forging iron. It must be forged and formed with a large enough equipment. , this kind of equipment is very complex and involves many different disciplines and fields. It can only be produced by integrating national resources from departments like the Ministry of Machinery Industry.”
Chang Haonan. Ran nodded.
In fact, it is just like the Nikolaev Shipyard cannot complete the Varyag aircraft carrier on its own.
Fortunately, China still has objective conditions.
It's just that research funds in various fields are not abundant now. If you want to carry out such a project with high initial investment, you have to come up with some sufficient reasons and go to the higher authorities to get special approval.
"Big enough...how big should it be?"
This question is not that Chang Haonan is pretending to be stupid, but that he really wants to know more so that he can go to Ding Gaoheng for a project later. :
“I see that those aircraft manufacturers also use super large forging equipment to make parts such as landing gears. Isn’t that enough?”
Jin Gui shook his head decisively. ：
"Not enough. You should be talking about the 30,000-ton die forging press in our country, or another 12,000-ton free forging press. They are both single seedlings."
Although he is the Minister of Supply and Marketing, Jin Gui talks about these things as if they are treasures:
“To put it into perspective, that 30,000-ton machine is already one of the 15 most powerful die forging presses in the world, like Germany and The UK is at the same level as us, but it is far from enough to produce the wheel hub we designed. "Isn't 30,000 tons enough?"
Before Chang Haonan was reborn. I have seen in the news that China has the world's largest 80,000-ton die forging press, but I did not expect that it could have a 30,000-ton press in the 1990s.
"It's not enough. If you want to build it, you must at least..."
He suddenly paused and leaned back in his chair to think for a few seconds:
"At least 50,000 tons At this level, if there is some margin, it would be safer to start with 60,000 tons."
"60,000 tons..."
Chang Haonan secretly wrote down this number. At the same time, I felt somewhat unsure.
The later 80,000-ton die forging press was put into trial production in 2013.
As Jin Gui said just now, large equipment involves too many fields, and the equipment manufacturing industry is a very accumulated industry. It would be difficult to replicate it under the current situation...
“Now we only have 30,000 tons, so this is a doubling. In the field of our aircraft, if the maximum take-off weight is doubled, the technical difficulty is quite great. Our country’s current foundation... ..."
"Isn't this...I can't guarantee it 100%"
Jin Gui touched his chin lightly:
"But I know that in the late 1980s, Qinghua University designed a 65,000-ton heavy-duty die forging press, and had done a lot of production preparations, but it was stopped midway."
"I'm not sure what the specific situation is, but at least related technologies, such as pressure cylinders, pressure storage cylinders, and drive motors, must have been pre-researched. In short, the technology in this area is definitely not blank, otherwise we would start from the beginning. There is no idea.”
This is definitely a huge surprise for Chang Haonan.
The heavy-duty forging press can perform hot die forging and isothermal superplastic forming of difficult-to-form materials such as aluminum alloys, titanium alloys, high-temperature alloys, and tungsten powder alloys. Therefore, it is widely used and can be used in nuclear energy, petrochemicals, It plays a role in almost all industrial fields such as shipbuilding.
Aerospace is also included, of course.
For example, they are needed in the manufacturing of large aircraft landing gear, airframe load-bearing frames, landing gear, large rocket forging rings, etc.
Once made, it can be used for tens or even hundreds of years. It will definitely benefit the present and future generations.
After getting the information he wanted, Chang Haonan calmly chatted with Jin Gui about other more relaxed topics, but his mind was already thinking about how to implement this big project. .
Although he has made considerable contributions in the past six months or so and has been registered as the director of the Science and Industry Committee, this kind of thing can be said to involve the entire manufacturing field. Let alone him, not even Du Yishan or even Ding Gaoheng himself could decide on the big job in just one sentence.
Among other things, feasibility studies and cost recovery cycles must be done.
The only good news is that due to Chang Haonan's personal influence, the current domestic large aircraft project should not die suddenly as McDonnell Douglas was acquired in the previous life, and the planned production model is also likely to be upgraded from the 70-ton MD90 to The 100-ton class in Figure 214.
So after this heavy-duty forging machine is built, it can be guaranteed to have continuous use, and it will not be left idle after making a few hydropower unit parts.
But this is not enough.
At least not enough insurance.
(End of this chapter)