"Even if the 45,000-ton large press is very tight in three years. Many supporting facilities have to be rebuilt, and some equipment must be specially developed..." Chu Guorong said.

Zheng Yucheng still has to make his own decisions about what happened.

The project is 404, and most of the investment is borne by 404. If Zheng Yucheng forcibly needs to make 65,000 tons, they have no choice.

Zheng Yucheng looked ugly, gritted his teeth and did not speak, but just looked at Chen Hong.

His eyes made Chen Hong feel embarrassed. He had indeed deceived Zheng Yucheng before. He knew better than anyone else how difficult it is to have a 65,000-ton large press and how high the technical risk is.

The country needs this thing, but the government has no money to invest. In other words, some technical fields have more urgent demand for funds, so after 404 expressed interest, he became mindful.

As the Minister of Industry who has presided over the design and manufacture of nine sets of molding equipment for the country, he hopes that the country can have such cutting-edge manufacturing power more than anyone else.

Now I have to tell the truth, I can't produce a 45,000-ton large press in the end to tell Zheng Yucheng the truth, that it would definitely not be a good thing.

"Minister Chen, if we build a 45,000-ton large press, will we grasp the big one? How high is the technical risk? Can manufacturing be really completed within three years?" Xie Kai calmed down.

He also became distrustful of Chen Hong.

Before, he and Zheng Yucheng, and even the entire base management committee, became a little inflated because the situation was getting better, no longer considering the technical difficulty and industrial foundation. The most considered funding issue was the issue.

I always feel that as long as I have money, nothing can be made with money.

They ignore time, experience accumulation in the technological development process, and even more ignore the overall domestic industrial technology support.

The Beth engine has been introduced in 1974. The UK transferred the license rights and technical information to China for the production of Spey, providing all assembly and parts drawings, process regulations, as well as various technical specifications, instructions and work clothes drawings, and dispatched experts to provide technical assistance.

However, all this does not include the UK's design experience and manuscripts in the process of designing and developing bass engines. The UK even refuses to send any engine design expert to China for consultation.

The British made it clear that they could sell equipment and technology, but they would not sell their "heads". This made it impossible for the country to use it for ten years and have not digested all the design drawings of this set of engines. Until now, they have not been able to complete the domestic production.

As a veteran, Xie Kai knew that the bass engine would not pass the acceptance of domestic engineering technology until 2003.

It took nearly thirty years to digest a design that China has no experience!

The complexity of a large press is not much less than that of an engine.

What he is worried about now is whether the country has the ability to manufacture it.

Don’t invest their money in that time, design various projects and wait for the big press, and finally tell them that the big press cannot be produced.

"If we only challenge 45,000 tons, the technical difficulty is not particularly great. China also has a complete set of technologies; at the same time, this process is also a demonstration of some technologies of 65,000 tons. The 45,000 tons large press built by Mesta Company for the US Aluminum in 1955 also adopts a three-beam and four-column structure, but the structure is bulky and the rigidity of the beam reaches 0.6 mm per meter... We must improve the design, use more advanced structures to solve these problems, and improve the rigidity of the equipment..." Chu Guorong explained to Xie Kai.

"If you don't first get a 30,000-ton or 45,000-ton large press to verify these improved technologies and directly use them for a 65,000-ton large press, once the technology is unreliable, the consequences will be catastrophic." Chen Hong also spoke.

The largest work of large presses in China is only 30,000 tons, and the production volume is not large, only one is Southwest Aluminum.

This was designed and constructed by Chen Hong himself. He knew better than anyone else about the problems encountered in the production process.

The technology from the 1950s and 1960s is not behind the use of today, but it has a great impact on the service life of large presses.

The design service life of a large press is over a hundred years. If there is a structure problem, it will not only fail to work, but will cause some serious consequences.

"We have American technology here?" Xie Kai asked with a frown.

"No, but our people have visited their factories. You should be clear that the equipment structure can be easily seen... Everyone knows the principle of a large press, but how to achieve it and increase the working pressure of tens of thousands of tons, this puts forward harsh and strict requirements on design experience and construction foundation!" Chen Hong said.

Many key equipment abroad are basically not even allowed to be seen by Chinese people.

"In the American Alcoa Corporation, we found that their 45,000-ton large press heavy cast beams have a huge elastic deformation and structural deflection, which has a very serious impact on forging accuracy. At the same time, the service life is very short. The upper and lower beams will be scrapped every 50,000 times used, and the columns and hydraulic cylinders can only be scrapped if used 20,000 times... The 75,000-ton large press in the Soviet Union used these problems, and used non-prestressed structures to fix multi-layer super-thick steel plates with bolts to form an integral frame. This can solve the defects such as bubbles and thick metallographic structure generated during the production of heavy castings..."

Chen Hong's series of professional and technical terms made Zheng Yucheng even more puzzled.

Even Xie Kai can only barely understand these things.

"Do we use this design technology from the Soviet Union? Can we successfully copy it without reference?" Xie Kai was most worried about this.

The Soviet Union's 75,000-ton large press was absolutely impossible to see for people from other countries.

There is no hope for Chinese professionals to see.

"No, we all use our own special designs. We give up the Soviet Union's non-prestressed structural design. We don't know this technology. Huaqing University has been studying wire-wrapped prestressed mesh structures over the years..." Chen Hong said to Xie Kai.

Xie Kai was very pleased that he could understand his professional introduction.

When he introduced, he also stared at Xie Kai's expression, which didn't seem to pretend to understand.

"Has this technology been developed?" Xie Kai became a little surprised.

This is the core technology of the domestically produced 80,000-ton large press.

Didn’t it be researched in the 1990s?

If this technology is developed, their large presses will be much higher in terms of forging accuracy and production efficiency than those of the same type.

That is a real new technology.

"At present, only theoretical research and model experiments have been successful, only by producing products can the reliability of the technology be finally verified." Chen Hong looked at Xie Kai and said seriously.

The subtext is obvious, and they cannot guarantee this technology either.

The risk will definitely be much higher when new technologies are adopted.

"I just want to know whether this thing can be really done within three years." Zheng Yucheng was hit very seriously this time.

Originally, I expected that with a large press of 65,000 tons, I could carry out more advanced projects.

"Yes!" Chen Hong said gritting his teeth, "This is a comprehensive assessment we have made based on the current foundation, and it is also the fastest time to manufacture it."

"How much risk? What is the chance of success? If this technology fails, what is the backup plan?" Xie Kai knew better than Zheng Yucheng. He didn't care about when it could be made, but more concerned about how high the technical reliability was.

"Do you know very well about the big press?" Xie Kai asked a question that was professionalism that neither Chen Hong nor Chu Guorong expected.

"I know the principle, but the specific technical details are not clear." Xie Kai said. "We have a complete set of specific technical information for the national dismantling project..."

To avoid arousing suspicion, he explained.

This made the surprise in the eyes of the two even more.

"At Huaqing University, we conducted multiple finite element analysis through supercomputers, and created a 4,500-ton all-metal model at a ratio of 1:10. We mainly use electrical measurement methods and other means to test the strength and stiffness of structural parts such as frames, beams and important parts under various load conditions, and compared them with the finite element analysis results of supercomputers to finally determine the main structure..." Chu Guorong introduced.

"Is finite element analysis now in China?" Xie Kai had no chance to get in touch with these things before.

When will the country start to adopt cutting-edge technology be confidential?

Huaqing University uses finite element analysis on their large press project, which will make the structure much more reliable.

"It has been used all the time, but the supercomputer performance was not good before, and the calculation results were very slow." Chen Hong said, "It has been used in the domestic aerospace field, otherwise our R&D cost would not be much lower than that in foreign countries. Even the Yun-Ten team used finite element analysis to understand the safe flight time of their aircraft..."

Chen Hong's words made Xie Kai understand that the country is not as good as they imagined; at the same time, it is not as bad as they imagined.

There are only a few ways to solve the problem, and they are used abroad, and there are also many in China.

"In this way, the possibility of success is still very high?" Zheng Yucheng couldn't understand, but he could judge what they meant.

"If we use a large casting structure, we can guarantee 100% success. However, poor processing accuracy will ultimately not be able to strike the 65,000-ton large press. This traditional technology is used for a 65,000-ton large press, and its service life will not exceed ten years... At the same time, poor accuracy has almost no major effect, and the maintenance cost will be very high..." Chen Hong explained patiently.

To make an impact on a 65,000-ton large press, new technical design must be adopted.

How to choose depends on Zheng Yucheng and Xie Kai.
Chapter completed!