"It's very ordinary? If you can see it, their number in the country will be so scarce? The heads of various units have to treasure them?" Zheng Yucheng heard Chen Tong'an's muttering, and his face was disdainful.

Xie Kai also despised Chen Tongan.

No insight at all.

"They keep disassembling and putting it on, so complicated?" Chen said, "It has nothing to do with the accuracy of the parts they make, right?"

"It's not just a relationship, it's a big relationship. Xie Kai said to Chen Tongan, "They repeatedly disassembled and assembled, the purpose is to let them fully understand all the parts assembly relationships." That's where they constantly ask the technician about the various parts of the process throughout the process. In this process, all the parts of the entire equipment have formed a model in their minds, and they already have a number in their minds about what the accuracy requirements of each one are and what will happen after assembly. ”

"You know them well?" Chen Tongan didn't believe.

"At least I know better than you, I've been in any workshop in our entire factory, but their workshop doesn't allow outsiders to enter...... Xie Kai said.

If he wants to go in, Zheng Yucheng will definitely not refuse.

But Xie Kai never offered to go.

The working conditions of those old men will make Xie Kai unbearable.

In his previous life, he hated the management of the base, and the people who built it.

After being reborn, he was entangled, and it was also because of these truly selfless talents that he was entangled, so that he could not face the future of the base.

The ninth-level fitters, in the 404 base, also don't know much, and they rarely appear in the sight of everyone in the base.

Most of the ninth-level fitters have no family, no children, and even usually eat and live in the workshop.

This may have something to do with the fact that there are more men and fewer women in the base, and more importantly, they don't have time to take care of their own families.

Just like Xie Jianguo and his wife, they even forgot the existence of their son when they were busy.

The ninth-level fitter is even crazier than Xie Jianguo.

There are quite a few people who, after entering the base, have never left.

Wei Lao and Liang Lao have long since retired, but they are reluctant to return to their hometown, and the new generation of ninth-level fitters in the base is becoming more and more difficult to appear, they take the workshop as their home, in addition to sleeping, they are constantly using manual hands to manufacture all kinds of high-precision parts that the outside world cannot imagine.

This is the person in the entire base that Xie Kai can't face the most.

Zheng Yucheng's attitude towards them is also because of this.

Everything about himself is completely dedicated to national defense construction.

"Go and rest for a while, and when you start working in the afternoon, you give them a hand. Zheng Yucheng sighed and said to Xie Kai.

Xie Kai nodded and didn't say anything more.

At noon, the old men who were resting in the guest house ate some food specially ordered by Zheng Yucheng to prepare Chen Degui in the canteen and began to devote themselves to work.

They did not disassemble the parts on it, but first put their tools on the workbench specially prepared for them, and various types of files, sandpaper of different thicknesses, cloth and other tools were neatly arranged on the workbench.

Equipment that needs to be repaired, right next to it.

The technicians for the repair were waiting on the sidelines.

"Where's the parts?" Wei Lao, who is usually on the verge of death, has changed his appearance at this time.

The twilight that was about to die was gone, the dim old eyes were shining, and even some slightly shaky hands became stable, and he grabbed a silver-white file the thickness of a little finger in his hand and asked the technicians next to him.

"It's coming, it's coming!" Zheng Yucheng and Chen Degui did not rest in the morning, and kept watching the maintenance workshop to process various parts.

At this moment, the two of them each pushed a parts transfer cart into the workshop, and there were many parts of different shapes stacked on it, and these parts were very small.

There are quite a few plastic baskets in the car, and each basket has different parts inside.

"Old Wei, your blank is here. Zheng Yucheng pushed the cart over and put the basket with his name number written on it on the old man's workbench.

"The parts are numbered, numbered next to each other, and they are arranged on the top of the workbench. Wei Lao said to Xie Kai, who was waiting on the side, and several technicians from Factory 691 next to him were ready to help, but they were scolded by him, "Don't move, wait until you are asked to do it." ”

Xie Kai knew how they worked, so he placed the parts on the workbench and moved a chair behind Wei Lao.

Wei Lao didn't look at him at all, he held a thumb-sized square part in his hand, placed the sketch of the part pressing, sat on the stool, looked at the drawing again, and then closed his eyes.

Time passed minute by minute, and as the people around him were waiting impatiently, he opened his eyes suddenly.

Pick up the micrometer on your right hand and start measuring the width of the entire part.

Everyone was puzzled, and no one dared to ask, they had been warned before that they were not allowed to disturb the old man's work.

"Go find a piece of glass. Wei Lao said to a middle-aged man in his thirties next to him.

The middle-aged man turned to leave, but Wei Lao still didn't move, but used a caliper to measure some holes on small parts.

"Scrap!" the old man just measured a few positions and threw the parts in his hand aside.

Xie Kai hurriedly handed him the spare one.

The old man took measurements, took out a round file that was not much thicker than a pen refill from the neatly arranged files, and began to gently misplace the hole in the middle of the part.

I measure while making a mistake.

"I removed the No. 07 and No. 13 parts that I assembled with this. The old man said to the assembly technician next to him while filing.

At their last assembly this morning, all the parts that needed to be replaced were numbered.

The parts were quickly disassembled, and after the old man measured and repaired a few holes, he began to repair them more carefully with the original parts above.

It took just over an hour to get just a few holes.

Then the old man put the parts on, took them off, put them back on and took them off.

With each repetition of the process, the holes that have become smooth are repaired with a different file or even sandpaper.

It was not until finally that the holes were no longer repaired, and the shape was repaired with a larger flat file.

While filing, I measured, and then began to grind the shape with coarse sandpaper.

The cutter marks left by the milling cutter on the part begin to disappear under the action of the file, and then the surface is smoothed by different sandpapers.

Small parts are a very critical part in the alignment system of the lithography machine.

This small part is the key to driving the focus of the microscope.

The moving axis of the focusing mechanism of the lithography machine drives the continuous subtle movement, and the surface roughness does not meet the requirements, which will cause friction and form a displacement error, which will be several 0.01 mm.

And the manufacturing process of this thing is 1 micron, which is 0.001 mm!

The lithography machine that is being repaired, this thing is not only deformed, but also worn out.

Microscopes and all that are good.

As long as the accuracy problem of the focusing system is solved, the movement accuracy of the workbench can be achieved, and some other non-core key electronic components can be replaced, and it can be used.

The most important part of the lithography machine is the action table part, which is equivalent to the sample of the chip circuit master is installed on the lithography machine during the production process, and as long as there is no problem, it will not be replaced, and the circuit diagram on the sample is continuously copied to the silicon substrate through physical or chemical methods.

In fact, it is equivalent to a film negative, which can be developed over and over again to produce the same photo.

Whether the mask can be in the specified position determines the position of all circuits of the chip.

Otherwise, the manufacturing requirements in this area would not be so high.

When Liang Lao was working, he was completely different from the previous image of the old man, and the movements in his hands were steady, accurate and fast.

This is all time-consuming, a thumb-sized part, from the very beginning of the surface can still see the milling cutter processing marks or the coarse sandpaper grinding marks began to disappear, and finally, Liang Lao put the part on the glass plate, began to polish with burlap, and when polishing, still keep measuring.

Gradually, the parts that were originally silver-white metallic began to reflect light, and finally changed towards the surface of the mirror, becoming brighter and brighter, until a human figure could be reflected in the back.

To the extent that this kind of handiwork can be achieved, Xie Kai has seen it, so he doesn't feel shocked.

And the others who have not seen it, their eyes are bulging.

Just such a part took Liang Lao a full two hours!

"Change part 03. Liang Lao carefully wiped off the fine dust on the glass with silk and said to Xie Kai.

"Take a break, it's been two hours now. Xie Kai felt a little heartache for this old man, he was seventy years old.

This kind of work seems to be very intense, and the physical exertion is quite fast, and it is necessary to keep the mind in a state of high concentration all the time.

"Just a little longer? The ball and hemisphere of the leveling mechanism have to be done, and that takes more time. The old man shook his head. "But if you get that done, there's nothing else that is too difficult, after all, this thing is related to the leveling of the sample, and if you deviate slightly, the size of the projection will be problematic. We ourselves know how to arrange breaks. ”

Xie Kai didn't talk nonsense, and directly handed a hemispherical part to the old man.

Repeat the previous job, first with a file, then sandpaper, then with cloth.

To deal with this hemispherical part, Liang Lao did not use any measuring tools, but used the original parts on the lithography machine to constantly install and modify some places.

This time it was a long time, and it took four and a half hours for the surface of the hemisphere to shine like a mirror.

The other old men are the same, they all rely on the file in their hands, and the sandpaper keeps processing.

After their processing, the various parts are completely different from the original 691 factory.

"The surface looks better than the original, and there is no problem with the dimensional accuracy, right?" Chen Tongan looked at the various reflective parts, and felt completely incredible in his heart.

However, with enough time, apprentices who have just come out of the apprenticeship can also process it.

Dimensional accuracy is what determines the accuracy of the equipment.