When will I have a long tassel?

It's time to get off work at Military Factory 82.

In the confidential workshop of Project 04, which has been officially code-named 404, engineers from many local machine tool companies across the country packed up their work supplies and walked out of the workshop talking and laughing. Only one slender girl was still squatting. Working in front of a disassembled machine tool with measuring tools.

"Less, why don't you go eat?"

Project team leader Guan Yong came over and greeted with concern.

"Teacher Guan, I'm not hungry yet."

Yu Xiaohui raised her head, brushed a few stray hairs from her forehead with her hands, and said to Guan Yong with a smile.

"Are you still studying this deep hole boring machine? Don't make yourself too nervous." Guan Yong said, "Other people's machine tools have secrets, but they are kept secret. We can only explore slowly. The gap between us and foreign countries is, You can't make up for it in a day or two. If you don't eat on time every day and miss the meal time, just grab a pack of instant noodles to deal with it. If you continue like this for a long time, your body will collapse."

Yu Xiaohui said: "Thank you, Teacher Guan. Actually, I don't just eat instant noodles. I also have beef that my boyfriend sent me. I heated it up in the microwave. It's very fragrant. It's much better than the food in the cafeteria."

"Really, there is still such a thing? Haha, I'm afraid there is a mental factor here. Well, I can't understand the things about you young people, so I'll get off work first, and you should go back from get off work early."

"Okay, see you, Mr. Guan."

Guan Yong and other colleagues left. Yu Xiaohui lowered her head again, picked up the caliper placed aside and began to measure the dimensions of each component of the machine tool, her brows gradually wrinkled.

This is a deep hole boring machine designed and manufactured by Linyi Machinery Co., Ltd. imitating similar products from German Botech Company. It 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 Botai machine tools. It can be regarded as a complete copycat machine.

When Linyi Machinery manufactured this boring machine, the requirements were very strict. The size and assembly accuracy of all parts were the same as those of Botai Machine Tools. Some key components even directly used imported parts. However, when it was actually used, it still reached the standard. Not as accurate as the original machine.

In terms of reasons, even if Yu Xiaohui, a doctoral student without much practical experience, cannot tell it, veteran engineers such as Guan Yong who have been working in the company for decades can definitely tell it.

Among them, there are some assembly tips, there are also differences in the heat treatment of machine tool component materials, and even the counterweights of different parts are also particular. When the machine tool is running at high speed, any slight imbalance will be amplified, which will affect the stability of the tool and workpiece.

For machining that does not require high precision, these effects are negligible. But if the processing accuracy requirements are high, these factors need to be taken into consideration. Domestic machine tools have always performed poorly in high-precision machining because they cannot solve these problems.

"We can only keep trying and accumulate experience and data. There is no other way."

This is what the old engineers taught Xiaohui. PATEO can solve these problems because it has many years of experience in manufacturing high-precision machine tools. In fact, its experience is gained through repeated failures, and is supported by countless dollars.

Chinese machine tool companies have only begun to develop high-precision machine tools in recent years, and there is a big technological gap with foreign countries. Because of the gap, domestic users are unwilling to use domestic high-precision machine tools, which in turn makes it difficult for Chinese machine tool companies to gain opportunities to accumulate experience.

This time, the Science and Industry Committee decided to launch the "04 Project". While importing high-precision machine tools from Western countries, it also supported domestic companies in developing similar products. It also allocated sufficient funds for trial and error. It was quite bold. But as Guan Yong said, the gap cannot be made up in a day or two. Chinese machine tool companies have too many lessons to make up.

Is there no way to shorten this 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 theory begin? She vaguely thought about something, but she couldn't grasp the fragments of these thoughts when it came to concrete things to do. She measured the disassembled machine tools over and over again, trying to find inspiration from these boring data.

"Yu Gong, are you still busy?"

A voice sounded beside Yu Xiaohui.

Yu Xiaohui turned around and saw that the person speaking was Zhao Jinquan, the old master guarding the workshop gate. This is an old worker in his 60s. It is said that he was re-employed after retirement. He was arranged by Factory 82 to do some chores in Workshop 404, and was responsible for being on duty in the workshop at night.

He smiles all day long and is extremely polite to everyone. Yu Xiaohui asked him many times not to call herself "Yu Gong", but to call herself "less than" or call him by his first name. But Zhao Jinquan insisted that Yu Xiaohui, like everyone else, was a learned person and should be honored as "Yu Gong".

"Master Zhao, let me think about this boring machine here." Yu Xiaohui said to Zhao Jinquan politely.

"Is this the boring machine we made ourselves? I think it's not much different from the ones made in Germany." Zhao Jinquan came up, touched the boring machine with his hand, and said with emotion.

Yu Xiaohui sighed: "It seems that there is not much difference, but when it comes to actual processing, the difference is quite big. Botai's boring machine can maintain an accuracy of 2 microns for a 1000 mm deep hole, but we can only achieve 5 microns. , you 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. When everyone is doing experiments in the workshop, Zhao Jinquan often comes over to watch the excitement. When talking about the performance of a specific machine tool, he can comment on it, showing that he has some knowledge of the machine tool.

After hearing Yu Xiaohui's words, Zhao Jinquan said: "Yu Gong, don't be too anxious. Compared with Germany, there are still some gaps between us. I remember that we ourselves can't build deep hole boring machines of this level. Foreign countries People are not willing to sell it to us, and our 82 Factory even built earth-moving equipment for deep-hole boring in the past.”

"Yes, but that is a thing of the past." Yu Xiaohui said, "Master Zhao, you may not know much about it. Our Linji Group has imported a large number of equipment from abroad in recent years, and has also made some technological innovations ourselves. Many There is no gap with foreign countries in terms of quality.

"For this deep hole boring machine, we used a lot of imported parts, and the parts we produced have basically reached the level of Botai's original parts. But the assembly of the same thing is not as good as other people's, which is really uncomfortable. ah."

Zhao Jinquan asked: "I see that you have been working overtime in the workshop every day these days. Sometimes you don't go back until late at night. Are you thinking about this matter?"

"Yes." Yu Xiaohui said.

"So, what have you figured out?" Zhao Jinquan asked.

Yu Xiaohui was stunned and didn't know how to answer.

Factory 82 was able to arrange for Zhao Jinquan to be on duty in the 404 workshop. This person was certainly trustworthy, and Yu Xiaohui had no problem keeping secrets from him. But as an old worker looking at the gate, it seemed a little abnormal to ask Yu Xiaohui about machine tool design problems, and it was a question that even Yu Xiaohui found difficult.

Even if Yu Xiaohui was willing to satisfy the old worker's curiosity and explain something to him, would he be able to understand it?

Seeing that Yu Xiaohui was silent, Zhao Jinquan smiled and spoke first. He said: "I have an immature idea. Let me share it with you, Yu Gong. Maybe I can give you some reference. I wonder if you are interested in hearing it?"

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

However, in her heart, she basically had no hope that Zhao Jinquan could give her any good advice. She felt that Zhao Jinquan might be that kind of "civilian scientist" who had many ideas, but they were either untenable wild thoughts or some knowledge that had long been established in the academic world.

Zhao Jinquan said: "I think there may be something wrong with your thinking direction, Yu Gong. You are always here to analyze which parts of our machine tools are not as good as others, and where there are errors in the assembly. Think about it this way , I’m afraid it’s difficult to come up with a result.”

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

Zhao Jinquan said: "Actually, making machine tools is like making missiles. To make the best missiles, you don't necessarily need to use the best parts. Our country's processing technology level has always been inferior to Western countries, so we made The components are not as precise as other people’s. But does that mean we don’t build the best missiles?”

Yu Xiaohui's eyes lit up, and she felt like 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 produce are not as good as others, but we have a magic weapon to win. We can organize imperfect things into a perfect whole through perfect methods."

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

These days, Yu Xiaohui has been thinking about improving machine tools, and occasionally thinks that the machine tool should be analyzed as a whole, which is exactly the idea of ​​​​system engineering. When she was in school, she was exposed to the concept of systems engineering, but she didn't understand it deeply. When it came to applying it, she didn't know where to start.

What Zhao Jinquan told her was clearly about systems engineering. How amazing it is to combine imperfect parts into a perfect product.

"Yes, it's 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'm thinking that this method is also useful for you to develop machine tools. of."

Zhao Jinquan spoke slowly, his eyes shining with wisdom.