When it was time to get off work, Gu Yuan took a few subordinates and left the workshop dejectedly and walked outside the production area. At this time, there were also many workers off work, and everyone chatted about all kinds of gossip while walking, and all kinds of southern and northern tones were mixed together. Gu Yuan and the others walked among the workers, and they were chatting in a low voice, and a cold sentence got into Gu Yuan's ears:

"The bearing assembly of imported machine tools is not a great difficulty, I ...... at the beginning"

Imported machine tools, bearings!

These two keywords made Gu Yuan couldn't help but be stunned, and he hurriedly pricked up his ears, wanting to hear what was going on.

I heard a young voice behind me saying, "Teacher Han, what do you say about over-cooperating, is there any benefit to doing this?"

Another slightly more mature voice replied: "This is to reduce the impact of vibration caused by the gap of the machine, foreign precision machine tools generally use this method, we used less in the past, and now we have begun to apply." ”

"It's not very troublesome to remove the interference assembly bearing"

"It's not troublesome, didn't I show you last time?"

"That's, hehe......"

"Let's go, if it's late, there will be no more braised pork......"

As he spoke, the two of them overtook them from behind Gu Yuan and his party, and they really strode forward, probably to grab braised pork. Gu Yuan barely even thought about it, reached out and grabbed the clothes of the young man walking behind, and shouted, "Young man, wait!"

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

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

The middle-aged man who was talking to the young man just now also turned around and asked, "Xiao Tang, what's wrong?"

That Xiao Tang is naturally Tang Zifeng, he pretended to be stupid and said: "Old Han, I don't know, this old master just pulled my clothes and asked me to wait." ”

"Excuse me, which workshop are you two from?" asked Gu Yuan.

Tang Zifeng and Han Weichang looked at each other, and then asked with a little displeasure: "What are you asking what are you doing here, which workshop are you from." ”

"Me, I'm from workshop 205. Gu Yuan said. He didn't think about whether he wanted to reveal the identity of Factory 432 for a while, and finally decided to report a fake identity first. 17 All tens of thousands of workers, not to mention people in different workshops, even workers in the same workshop do not know each other, so he is not worried about goofs.

"205 workshop" Tang Zifeng was amused in his heart, but his face did not show it, he looked at Gu Yuan and asked: "So, master, what are you looking for me?"

"I just wanted to ask...... , the two of you understand the bearing disassembly of imported machine tools," Gu Yuan asked.

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

"Well, it's mainly a little curious...... "Gu Yuan said hewright. He's really not good at lying.

Tang Zifeng said: "What's curious about this, foreign machine tool assembly technology is of course different from ours." I'm sorry, old comrade, I have to leave quickly, and I won't be able to grab the braised pork if I get to the cafeteria late. ”

"But ......" Gu Yuan was really speechless, could it be that I am the chief engineer of a military industrial enterprise, and I am not as valuable as braised pork

Zhang Guoqing hurriedly came over to play the round. Gu Yuan is also used to being a leader, and he doesn't think much about others when he talks and acts, although Zhang Guoqing is also a deputy section chief in Factory 432, he is more down-to-earth after all. He smiled and said to Tang Zifeng and Han Weichang: "Two masters, we just happened to hear the two of you chatting, as if talking about the interference of imported machine tool bearings. Our workshop happens to be repairing an imported machine tool, and it seems that we have encountered this problem, so I want to ask you for advice, I don't know if it is possible. ”

"Don't you dare to ask us, since it's a matter in the workshop......" Han Weichang hesitated, as if he wanted to agree to the other party.

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

"Isn't it braised pork, two masters, don't go to the cafeteria, we have a treat tonight, the braised pork is enough, how about it" Xu Ping couldn't help it, and jumped out and interjected. What's going on with these 17 institutes, how did they raise a group of foodies?

"This isn't good...... Han Weichang had a difficult face.

Tang Zifeng also pretended to be embarrassed, but everyone could see his irrepressible joy. He said: "Oh, it's so embarrassing, how can I let you break the bank, but it's really not good to delay things at work, or let's talk while eating, and solving the problem as soon as possible is also responsible for the work." Isn't it, Master Han?"

"This ......"

Everyone in Factory 432 was speechless, the expression on his face was so good-looking, this young man's shamelessness is really powerless.

Han Weichang's old face also turned red, Assistant Tang, are you also the factory leader of Linyi Machine, can you not pretend that you haven't eaten anything good for half a year. It doesn't matter if you're a fake identity now, but sooner or later people will know your true identity, and at that time, it's the entire Linyi person who will be lost.

Gu Yuan and the others have been in the 17th institute for a month, and they are familiar with the surrounding environment. Out of the gate of the production area, Xu Ping led the way in front, and sure enough, he found a good restaurant in the family area, and went in to ask for a private room for everyone to sit down.

Han Weichang was really a little embarrassed, and after being polite to everyone repeatedly, he sat down. Tang Zifeng looked skinless and faceless, Zhang Guoqing pointed him to a seat, he sat down, and noisily beckoned others to sit down quickly.

Everyone in Factory 432 is not interested in eating, so ordering is very casual, but Xu Ping is not angry with Tang Zifeng's style, and at the same time ordered two servings of braised pork unique to Chutian Province, and stated that one of them is exclusively for Tang Zifeng to enjoy, and the other is for everyone to eat. For her arrangement, Tang Zifeng naturally laughed at it.

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

Gu Yuan first started a family relationship with Han Weichang, he could see that Han Weichang knew some technology, and Tang Zifeng was estimated to be an apprentice, and there was no value in enveloping.

Han Weichang also knew that today's starring role was himself, and Tang Zifeng was just a guest actor who appeared in friendship. He said to Gu Yuan: "I haven't been in the 17th Institute for a long time, and I have always been in other companies. ”

"Oh......" Gu Yuan responded, and it was inconvenient to get to the bottom of it, so he turned to the topic and asked: "Master Han, just now on the road, I heard you and this Master Tang talking about the installation of imported machine tool bearings, could it be that you have dismantled the imported machine tools."

"That's for sure. What German, Japanese, Italian, French, I have dismantled a lot of machine tools. Han Weichang said. This is really not bragging, the machine itself is a machine tool enterprise, and the machine tools in various countries have been studied. In the first two years, the benefits of the machine were not good, and the employees in the factory were engaged in sideline business outside to generate income, Han Weichang's sideline was to help enterprises repair machine tools, and during that time he also came into contact with a lot of various types of machine tools, which was the confidence that he dared to fool Gu Yuan and others.

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

"Of course it was. Han Weichang said, "dismantling this kind of bearing is particular, if you directly remove it, the interference on the shaft sleeve will be destroyed, and it may also cause the deformation of the shaft sleeve, and then it will be difficult to install it back." ”

Xu Ping and Zhang Guoqing looked at each other, and their faces were a little bitter. The spindle bearing of the imported grinding machine in the 205 workshop, they were torn off.

"But, Master Han, you said that you can't disassemble it, so how should this kind of bearing be disassembled?" asked Xu Ping.

Han Weichang said: "This has to be adapted to local conditions, the machine is different, the bearing is different, and the method of disassembly is also different." Under normal circumstances, the shaft sleeve should be filled with high-pressure oil, and the shaft sleeve can be expanded by the effect of oil pressure, so that the bearing can be easily removed. ”

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

Han Weichang said: "There are many ways to do this. Like the bearings of SKF in Sweden, there are special hydraulic tools that can be used. If there is no special hydraulic tool, we have tried in the past, and it can be done with ordinary manual piston pumps, but it is necessary to add a section of oil pipe, which is not a difficult task. ”

"So, what should I do if I remove it and put it back on?"

"Using the principle of thermal expansion and cold contraction, we have calculated that the difference between oil temperature and room temperature is about 100 degrees. ”

“......”

Xu Ping was dumbfounded, isn't it just to dismantle a bearing, why are there so many doorways. Listening to what the "Master Han" in front of him said is the truth, it shouldn't be fake. The problem now is that the 432 factory used to build machine tools, and it did not pay attention to these things, and all the technical inheritance was learned from the Soviet Union in the 50s. In the early 80s, the 432 factory imported technology from Western countries, mainly the technology of industrial control chips, and did not involve machinery, so Xu Ping can be said to know nothing about the mechanical know-how of Western machine tools.

When the 432 factory and the 17th institute jointly proposed the transformation of the machine tool, they did not take into account the difference between the imported machine tool and the domestic machine tool in the manufacturing process, and thought that they had also built CNC machine tools in the past, and the general principle was no different. Now I understand that the transformation of the machine tool is really not a simple thing, and I seem to have dug a pit and buried myself in it.