When will I have a long tassel?

When it was time to get off work, Gu Yuan and several subordinates left the workshop dejectedly and walked out of the production area. There were also a lot of workers off work at this time, and everyone was chatting about various gossips while walking, and the voices of various southern and northern accents were mixed together. Gu Yuanran and others were walking among the workers, and they were chatting in low voices. Suddenly, a sentence came into Gu Yuanran's ears:

"Assembling bearings for imported machine tools is not a difficult task. Back then I..."

Imported machine tools and bearings!

These two keywords made Gu Yuanyuan shudder, and he quickly pricked up his ears, wanting to hear what was going on.

I heard a young voice behind me saying: "Teacher Han, what are you talking about interference fit? Are there any benefits to doing so?"

Another slightly more mature voice replied: "This is to reduce the vibration impact caused by the gaps in the machine parts. Foreign precision machine tools generally use this method. We used it sparingly in the past, but now we have begun to apply it."

"Isn't it troublesome to remove the interference-fitted bearing?"

"It's not too much trouble. Didn't I demonstrate it to you last time?"

"That's, hehe..."

"Let's go quickly. If it's too late, the braised pork will be gone..."

While they were talking, two people passed behind Tanihara and his entourage. They really strode forward, probably to grab the braised pork. Without even thinking about it, Tanihara reached out and grabbed the clothes of the young man walking behind, and shouted: "Young man, wait!"

"Huh?" The young man stopped, with a look of surprise on his face, "Master, why are you pulling me?"

"Excuse me..." Gu Yuan was speechless for a moment, not knowing what to say.

The middle-aged man who had just been talking to the young man turned around and asked, "Xiao Tang, what's the matter?"

That Xiao Tang was naturally Tang Zifeng. He pretended to be stupid and said: "Old Han, I don't know either. This old master just pulled my clothes and asked me to wait."

"Excuse me, which workshop do you two belong to?" Gu Yuan asked.

Tang Zifeng and Han Weichang looked at each other, and then asked with a bit of displeasure: "Why do you ask this? Which workshop are you from?"

"Me? I'm from workshop 205." Gu Yuan said. He didn't think about whether to reveal the identity of Factory 432 for a while, but finally decided to give a false identity first. 17 There are tens of thousands of employees, not to mention people in different workshops, even workers in the same workshop do not know each other, so he is not worried about gangs.

"From workshop 205?" Tang Zifeng was amused in his heart, but it didn't show on his face. He looked at Gu Yuan and asked, "So, master, what do you want from me?"

"I just want to ask... do you two know how to disassemble the bearings of imported machine tools?" Gu Yuan asked.

Tang Zifeng glanced at Han Weichang again, and then said with a calm face: "Master, why do you ask this?"

"Well, it's mainly because I'm a little curious..." Gu Yuanyuan hesitated. He's really not good at lying.

Tang Zifeng said: "What's there to be curious about? Foreign machine tool assembly technology is of course different from ours. Sorry, old comrade, I have to leave quickly. If I get to the canteen later, I won't be able to grab the braised pork."

"But..." Gu Yuan was speechless. Am I, the chief engineer of a military industrial enterprise, not as valuable as braised pork?

Zhang Guoqing came over quickly to smooth things over. Gu Yuan is used to being a leader and doesn't think about others when he speaks or does things. Although Zhang Guoqing is also a deputy section chief in Factory 432, he needs to be more down-to-earth after all. He smiled and said to Tang Zifeng and Han Weichang: "Two masters, we just happened to hear you two chatting, and it seemed that you were talking about the interference fit of imported machine tool bearings. Our workshop happened to be repairing an imported machine tool, and it seemed that we encountered This is a problem, so I want to ask you for advice, I don’t know if it is possible.”

"We don't dare to ask for advice. Since it's a matter in the workshop..." Han Weichang hesitated, as if he wanted to agree to the other party's request.

Tang Zifeng interrupted him and said to Gu Yuan and his party: "Masters, if you are interested in this issue, why don't you come to us in workshop 107 tomorrow? My master's surname is Han, and my surname is Tang. , you will know when you go to the workshop and ask. Now we are in a hurry to go to the canteen. If we go late, there will be no..."

"Isn't it just braised pork? You two masters, don't go to the cafeteria. We are treating you tonight. We have enough braised pork. How about it?" Xu Ping couldn't bear it any longer and jumped out to interject. What's going on with this 17th institution? How come it has a bunch of foodies?

"This is not good..." Han Weichang looked troubled.

Tang Zifeng also pretended to be embarrassed, but everyone could see his uncontrollable joy. He said: "Oh, this is so embarrassing. How can I let you spend money? However, it is really hard to delay things at work. How about we chat while eating. Solving the problem early is also responsible for the work. Well. Isn’t it, Master Han?”

"this……"

Everyone in Factory 432 was speechless. The expressions on their faces were really beautiful. This young man was so shameless that it was really hard to complain.

Han Weichang's old face also turned red. Assistant Tang, you are also the factory leader of Linyiji after all. Can you please stop pretending that you haven't eaten anything good in half a year? It doesn't matter that you are pretending to be someone now, but people will know your true identity sooner or later. By then, the entire Linyiji will be lost.

Gu Yuan and the others have been in Institute 17 for a month and are quite familiar with the surrounding environment. After leaving the gate of the production area, Xu Ping led the way. Sure enough, she found a pretty good restaurant in the family area. She went in and asked for a private room so that everyone could sit down.

Han Weichang was really embarrassed. After being polite to everyone, he sat down. Tang Zifeng, on the other hand, looked shameless. Zhang Guoqing pointed out a seat for him, and he sat down, and even presumptuously asked others to sit down as well.

Everyone in Factory 432 was not interested in eating, so they ordered dishes very casually. However, Xu Ping was not satisfied with Tang Zifeng's style, so she ordered two portions of Chutian Province's unique braised pork, and declared that one of them was specially for Tang Zifeng. What you enjoy is the other portion for everyone to eat. Tang Zifeng naturally laughed at her arrangement.

"Master Han, how many years have you been in Department 17?"

Gu Yuan had started a family affair with Han Weichang. He could see that Han Weichang knew some skills, while Tang Zifeng was probably just an apprentice and had no value in winning over him.

Han Weichang also knew that he was the leading actor today, and Tang Zifeng was just a friendly guest actor. He told Tanihara: "It hasn't been long since I arrived at No. 17. I have been working in other companies."

"Oh..." Gu Yuan responded, and it was no longer convenient to ask further, so he turned to the topic and asked: "Master Han, on the road just now, I heard you and this Master Xiao Tang talking about the installation of imported machine tool bearings. The question is, have you ever dismantled imported machine tools?"

"That's for sure. I have dismantled many machine tools from Germany, Japan, Italy, and France." Han Weichang said. This is really not bragging. Linyiji itself is a machine tool company and has researched machine tools from various countries. In the past two years, the performance of Linyi Machinery was not good, and the employees in the factory started to engage in side jobs to earn income. Han Weichang's side job was to repair machine tools for the company. During that time, he also came into contact with many types of machine tools. This was something he dared to fool. The confidence of Tanihara and others.

Gu Yuan said: "I just heard you say that the bearings of imported machine tools have an interference fit. We have been exposed to this interference fit in the past, but there are not many opportunities to do it ourselves. Master Han, have you disassembled it? A bearing with an interference fit?”

"Of course it has been dismantled." Han Weichang said, "There are particularities in dismantling this kind of bearing. If it is dismantled directly, the interference on the sleeve will be destroyed, and it may also cause deformation of the sleeve. It will be difficult to put it back on again.”

Xu Ping and Zhang Guoqing looked at each other, with a bitter look on their faces. They just tore off the spindle bearing of the imported grinder in the 205 workshop.

"But, Master Han, you said that it cannot be dismantled by force, so how should this kind of bearing be dismantled?" Xu Ping asked.

Han Weichang said: "This has to be adapted to local conditions. The machines are different, the bearings are different, and the disassembly methods are also different. Generally speaking, it should be filled with high-pressure oil into the shaft sleeve, and the oil pressure is used to make the shaft sleeve Expand so the bearing can be easily removed.”

"How to charge high-pressure oil?" Xu Ping continued to ask.

Han Weichang said: "There are many ways to do this. For example, Swedish SKF bearings have special hydraulic tools that can be used. If there are no special hydraulic tools, we have tested in the past that it can also be done with an ordinary manual plunger pump. We just need to add a section of oil pipe, which is not a difficult task.”

"So, what should I do after taking it apart and putting it back together?"

"Using the principle of thermal expansion and contraction, we use general heat treatment and tempering oil to heat it. We have calculated that the difference between oil temperature and room temperature is about 100 degrees."

"..."

Xu Ping was dumbfounded. It was just a matter of dismantling a bearing. Why were there so many ways to do it? Listening to what the "Master Han" in front of me said clearly, it shouldn't be a lie. The problem now is that Factory 432 did not have these particularities when building machine tools in the past. All the technical inheritance was learned from the Soviet Union in the 1950s. In the early 1980s, Factory 432 introduced technology from Western countries, mainly industrial control chip technology, which did not involve mechanical aspects. Therefore, Xu Ping could be said to know nothing about the mechanical know-how of Western machine tools.

When Factory 432 and Institute 17 jointly proposed a plan to transform machine tools, they did not take into account the differences in manufacturing processes between imported machine tools and domestic machine tools. They thought that they had built CNC machine tools in the past, and the general principle was no different. As long as CNC modules were added, By replacing a few parts, you can make money. Now I understand that machine tool modification is really not a simple matter. It seems that I have dug a hole and buried myself in it.