"It's very ordinary? If you can see that they will be so rare in China? The heads of various units have to cherish them?" Zheng Yucheng heard Chen Tongan's muttering and looked disdainful.

Xie Kai also despises Chen Tongan.

No knowledge at all.

"They keep disassembling and installing it, it needs to be so complicated?" Chen Tongan said, "This has nothing to do with the accuracy of the parts they make, right?"

"It's not only related, but also a lot of relationship." Xie Kai said to Chen Tongan, "They repeatedly disassemble and assemble the purpose of allowing them to fully understand the assembly relationship of all parts. This is also the role of them constantly inquiring about the various parts of the technicians throughout the process. In this process, all the components of the entire equipment have formed a model in their minds. They already know what the accuracy requirements are for each one and what happens after assembly."

"Do you know them very well?" Chen Tongan didn't believe it.

"At least I know better than you. I have been to any workshop in the entire factory over our side, but their workshops are not allowed to enter..." Xie Kai said.

If he wanted to go in, Zheng Yucheng would definitely not refuse.

But Xie Kai never asked to go.

Xie Kai couldn't stand the work conditions of those old men.

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

After rebirth, he was entangled because of these truly selfless and dedicated talents that made him entangled and unable to face the future of the base.

Level 9 fitters, at the 404 base, don’t know much, they rarely appear in the sight of the base.

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

This may have something to do with the fact that there are more men and few women at the base, and more importantly, they don’t have time to manage their families.

Just like Xie Jianguo and his wife, they even forgot about their son's existence when they were busy.

A nine-level fitter is even more crazy than Xie Jianguo.

Many people have never left after entering the base.

Mr. Wei and Mr. Liang had retired long ago, but they were unwilling to go back to their hometowns. In addition, the new generation of nine-level fitters at the base are becoming increasingly difficult to appear. They regard the workshop as their home. In addition to sleeping, they are constantly using hand to make various high-precision parts that cannot be imagined by the outside world.

This is the person that Xie Kai cannot face the most.

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

Dedicate everything you have to national defense construction.

"Go and have a rest. When you start to do something in the afternoon, you can help them." Zheng Yucheng sighed and said to Xie Kai.

Xie Kai nodded and said nothing.

At noon, the old men who were resting in the guesthouse ate some food prepared by Zheng Yucheng specifically instructed Chen Degui in the cafeteria and began to work.

They did not remove the parts on it anymore. First, they placed their tools on the workbench specially prepared for them. Various types of files, sandpapers of varying thicknesses, fabrics and other tools were neatly arranged on the workbench.

Equipment that needs repair is right next to it.

The repair technicians were waiting.

"Where is the parts?" Mr. Wei, who was usually lying on the verge of death, changed his whole body at this time.

The dusk air was about to be dead, the old eyes were shining with light, and even the slightly shaking hands became stable. He grabbed a silver-white file as thick as a small finger in his hand, asking the technicians who were helping him.

"Here, here!" Zheng Yucheng and Chen Degui did not rest in the morning and kept guarding the repair workshop and staring at the processing of various parts.

At this moment, the two of them pushed a cart for parts transport into the workshop, with many parts of different shapes piled up on it, all of which were very small.

There are many plastic baskets on the car, and each basket has different parts.

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

"These parts are numbered, next to each other, and arrange them on the workbench." Old Wei said to Xie Kai who was waiting. Several technicians from Factory 691 next to him were preparing to help, but he scolded him, "Don't move, wait until you ask you to do it."

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

Mr. Wei didn't look at him at all. He held a square part the size of a thumb in his hand, placed the sketch of the parts pressed, sat on the stool, looked at the drawings again, and then closed his eyes.

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

I picked up the micrometer on my right hand and started 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 men's work.

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

The middle-aged man turned around and left, but Mr. Wei still did not take action, but used a caliper to measure the distance between some holes on the small parts.

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

Xie Kai quickly handed him the spare one.

After the old man measured, he found a circular file that was not much thicker than the refill core from the neatly arranged files, and began to gently skew the hole in the middle of the part.

Measure while making mistakes.

"Disassemble parts No. 07 and No. 13 that are assembled with this." The old man said to the technician who was assembling next to him while filing.

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

The parts were quickly removed. After the old man measured several holes and repaired them, he began to repair them more carefully with the original parts on them.

It took more than an hour to just a few holes.

Then, the old man assembled the parts, took them off, and then assembled them, and took them off.

Each repeated process will be repaired with different files or even sandpaper.

It was not until the end that the holes were not repaired, and the larger flat files were started to repair the appearance.

While filing, measure, and then start grinding the shape with coarse sandpaper.

The cutter marks left by the milling cutter processing parts begin to disappear under the action of the file, and then different sandpapers make the surface smoother.

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

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

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

The manufacturing process accuracy of this thing is 1 micron, which is 0.001 mm!

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

Microscopes and other things are good.

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

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

In fact, it is equivalent to film negatives, which can continuously wash out the same photos.

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

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

When Mr. Liang was working, his image was completely different from the old man before, and his movements were steady, accurate and fast.

This all takes time. A part that is as big as a thumb, from the beginning, you can see the milling cutter processing marks or the rough sandpaper sanding marks on the surface, and finally, Mr. Liang put the part on the glass plate and began to polish it with a thick burlap. When polishing, he still kept measuring.

Gradually, the parts that were originally silver-white metallic began to reflect and finally changed toward the surface of the mirror, becoming brighter and brighter until the figure could be seen behind them.

Xie Kai has seen the level of this kind of manual can achieve, so he is not shocked.

And other people who had never seen before had their eyes bulged out.

Just one such part took Liang Lao two hours!

"Change Part No. 03." Mr. Liang carefully wiped away the fine dust from the glass with silk and said to Xie Kai.

"Let's have a rest, I've been working for two hours." Xie Kai felt a little sad about the old man, he was seventy years old.

This kind of work seems to be very small and consumes physical strength very quickly. It has to keep the mind in a state of high concentration.

"It's only a little longer? The focals and hemispheres of the leveling mechanism need to be done, and that takes more time." The old man shook his head. "But if you do that, there is nothing difficult about anything else. After all, this thing is related to the leveling of the sample. If you deviate slightly, the size of the projection will have problems. We know to arrange a rest."

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

Repeat the previous work, starting with a file, then sandpaper, and then cloth.

When dealing with this hemispherical part, Mr. Liang did not use any measurement tools, but used the parts originally found on the lithography machine to continuously install and modify certain places.

This time it took a long time, and it took four and a half hours to make the surface of the hemisphere look like a mirror-like light.

The other old men are the same, they rely on the files in their hands and keep processing sandpaper.

After they handled it, the various parts were completely different from what was originally processed by Factory 691.

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

However, with such a superficial level, as long as there is enough time, apprentices who have just given the apprentice can also be processed.
Chapter completed!