Military 82 Factory, it's already off work.

In the confidential workshop of the 04 project, which has been officially codenamed 404, engineers from many local machine tool companies across the country have packed up their work supplies and walked out of the workshop with a smile, only a slender girl is still squatting in front of a disassembled machine tool, holding measuring tools and busy.

"Less, don't you want to eat?"

Guan Yong, the project team leader, walked over and greeted with concern.

"Teacher Guan, I'm not hungry yet. ”

Yu Xiaohui raised her head, stroked a few messy hairs in front of her forehead with her hand, and said to Guan Yong with a smile.

"You're still working on this deep hole boring? Don't get too nervous. Guan Yong said, "Other people's machine tools have a knack, which is secret, we can only slowly explore." The gap between us and foreign countries cannot be bridged in a day or two. If you don't eat on time every day and miss the meal time, you can take a pack of instant noodles to deal with it, and if you continue like this for a long time, your body will collapse. ”

Yu Xiaohui said, "Thank you, Mr. Guan. Actually, I don't just eat instant noodles, I also have the beef that my boyfriend sent me, and I heat it up in the microwave, which is very fragrant and much better than the dishes in the cafeteria. ”

"Is there such a thing? Haha, I'm afraid there is a mental factor here. It's okay, I don't understand your young things, then I'll get off work first, and you should go back from work early. ”

"Okay, goodbye, Mr. Guan. ”

Guan Yong and the other colleagues left, and Yu Xiaohui lowered her head again, picked up the calipers placed aside and began to measure the size of the various parts of the machine tool, her brows gradually furrowed.

This is a deep-hole boring machine designed and manufactured by Linyi Machinery Company imitating similar products of PATEO in Germany, which is one of the core equipment required for national defense equipment manufacturing. Yu Xiaohui participated in the design of this boring machine and knew that its main parts were completely designed with reference to PATEO machine tools, which can be regarded as a complete copycat machine.

When the Pro One machine was manufacturing this boring machine? Demanding? The size and assembly accuracy of all components are the same as those of PATEO machine tools, and some key components are even directly imported parts? Can it be used in practice? But it still can't reach the accuracy of the original machine.

In terms of reasons, even if Yu Xiaohui is a doctoral student who does not have much practical experience, he can't say it? Veteran engineers such as Guan Yong, who have been in the company for decades, will definitely be able to tell.

Among them, are there some tips on assembly? Are there also differences in the heat treatment of machine tool components? Even the counterweights of the different parts are exquisite. When the machine is running at high speeds, the slightest imbalance can be magnified, which in turn affects the stability of the tool and the workpiece.

For machining that does not require high precision, these effects are negligible. But if the machining accuracy is too high? These factors need to be taken into account. Domestic machine tools have been underperforming in high-precision machining? It's because there is no way to solve these problems.

"There is no other way but to keep trying, accumulating experience and data. ”

This is the old engineer's teaching to Xiaohui. PATEO is able to solve these problems because it has many years of experience in manufacturing high-precision machine tools, in fact? Its experience is also exchanged for failure after failure, and behind it is the support of countless money.

Chinese machine tool companies have only begun to develop high-precision machine tools in recent years? There is a big gap between technology and foreign countries. Because there is a gap, domestic users are reluctant to use domestic high-precision machine tools? This makes it difficult for Chinese machine tool companies to gain the opportunity to accumulate experience.

This time, the Commission of Science and Technology is determined to engage in the "04 project", while importing high-precision machine tools from Western countries? While supporting domestic enterprises to develop similar products? And came up with plenty of money for trial and error? It's not a small amount of courage. But as Guan Yong said, the gap is not a day or two to make up, Chinese machine tool companies to make up for too many lessons.

Isn't there a way to shorten that time?

This is a question that Yu Xiaohui has been thinking about these days.

She knows the importance of experience, but she also believes that theoretical analysis can make up for the lack of experience and achieve twice the result with half the effort. But where should the theory begin? She vaguely thought about something, but she couldn't grasp the fragments of these ideas when she wanted to do something concrete. She measures the disassembled machine over and over again, looking for inspiration from the boring data.

"Yu Gong, are you still busy?"

A voice rang out beside Xiaohui.

Yu Xiaohui turned her head and saw that it was Zhao Jinquan, the master who watched the door in the workshop, who spoke. This is a 60-year-old worker, who is said to have been rehired after retirement, and was arranged by Factory 82 to do some miscellaneous work in workshop 404, and was responsible for being on duty in the workshop at night.

He laughs at Mimi all the time and is very polite to everyone. Yu Xiaohui has asked him many times not to call himself "Yu Gong", but to call himself "less than" or call him by his name. But Zhao Jinquan insisted that Yu Xiaohui, like everyone else, was a learned person and deserved to be called "Yu Gong".

"Master Zhao, I'm thinking about this boring machine here. Yu Xiaohui said politely to Zhao Jinquan.

"This is our own boring machine, right? I don't think it's much worse than the German-made one. Zhao Jinquan stepped forward, touched the boring machine with his hand, and said with emotion.

Yu Xiaohui sighed: "It looks like it's not much different, but when it comes to actual processing, the difference is still quite big." PATEO's boring machine, 1000 mm deep hole can maintain an accuracy of 2 microns, we can only achieve 5 microns, and we can't reach it any further. ”

She was able to speak to Zhao Jinquan like this because she knew that Zhao Jinquan also knew machine tools. Usually when everyone is doing experiments in the workshop, Zhao Jinquan often comes over to see the excitement, and when it comes to the performance of a specific machine tool, he can also comment on one or two, which seems to have some understanding of the machine tool.

Hearing Yu Xiaohui's words, Zhao Jinquan said: "Yu Gong, don't be too anxious. Compared with Germany, there is still a bit of a gap. I remember that we couldn't build this level of deep hole boring machine ourselves, and foreigners refused to sell it to us, and our 82 factory used to engage in soil equipment to do deep hole boring. ”

"yes, but that's in the past. Yu Xiaohui said, "Master Zhao, you may not know much, our Linji Group has imported a large number of equipment from abroad over the years, and has carried out some technological innovations by itself, and there is no gap between us and foreign countries in many aspects."

"Let's just say that we use a lot of imported parts for this deep hole boring machine, and the accessories produced by ourselves have basically reached the level of PATEO original parts. But the same thing, the assembly is not as good as others, it is really uncomfortable. ”

Zhao Jinquan asked: "I see that you have been working overtime in the workshop every day for the past few days, and sometimes you don't go back until late at night, are you just thinking about this matter?"

"Yes. Yu Xiaohui said.

"So, what did you figure out?" Zhao Jinquan asked.

Yu Xiaohui was stunned for a moment, and didn't know how to answer for a while.

Factory 82 was able to arrange Zhao Jinquan to be on duty in workshop 404, of course this person can be trusted, and Yu Xiaohui has no problem of keeping it secret from him. But as an old worker who watches the gate, it seems a little abnormal to ask Yu Xiaohui about the design of machine tools, and it is this kind of problem that even Yu Xiaohui himself finds very difficult.

Even if Yu Xiaohui is willing to satisfy the curiosity of the old worker and explain one or two things to him, can he understand it?

Seeing that Yu Xiaohui didn't speak, Zhao Jinquan smiled and spoke first. He said: "I have an immature idea, say it to Yu Gong for you to hear, maybe I can give you some reference, I don't know if you are interested in listening?"

"Okay, Master Zhao, please speak. Yu Xiaohui responded. She is a very humble person, and can maintain enough respect for even an old worker.

However, in her heart, she basically didn't have any hope that Zhao Jinquan could give her any good advice. She thinks that Zhao Jinquan may be the kind of "civil science" with a lot of ideas, but either they are untenable blind thoughts, or they are some knowledge that has already been concluded in the academic world.

Zhao Jinquan said: "I think there may be something wrong with the direction of your thinking. You are always here to analyze which parts of our machine tools are not as good as others, and what went wrong in the assembly in which place, so it is difficult to think of a result. ”

"So, what should I think?" asked Yu Xiaohui.

Zhao Jinquan said: "In fact, building machine tools is like building missiles. To make the best missile, you don't necessarily need to use the best components. The processing technology level of our country has always been inferior to that of Western countries, so the components we make are not as precise as others. But why don't we build the best missile?"

Yu Xiaohui's eyes lit up, and she felt as if she had caught some clue. She stared at Zhao Jinquan, waiting for him to continue.

Zhao Jinquan said: "Our equipment is not as good as others, and the parts we make are not as good as others, but we have a magic weapon to win, which can organize imperfect things through perfect methods and turn them into a perfect whole." ”

"You mean...... Systems engineering!" Yu Xiaohui blurted out.

These days, Yu Xiaohui has been thinking about improving the machine tool, and occasionally thinks that the machine tool should be analyzed as a whole, and this is precisely the idea of system engineering. When she was in school, she was exposed to the concept of systems engineering, but she didn't know much about it, and when it came to application, she didn't know where to start.

Zhao Jinquan told her that he was clearly talking about systems engineering. What a great thing it is to combine imperfect parts into perfect products.

"That's right, systems engineering. In the past few decades, we have relied on this magic weapon to develop the world's first-class rockets, satellites, and missiles under simple conditions. I wonder if this method will also be useful for you to develop machine tools. ”

Zhao Jinquan said slowly, his eyes shining with wisdom.