Siheyuan: Starting from a fitter

Chapter 310 Solving the Shock Absorption Problem
After one day of rest, Li Guocheng spent another three days reassembling an engine, and the Seiko workshop also assembled one.

Half a month later, the test results came out.

李国成装配的发动机的最大持续输出功率为1521马力，紧急情况下能以1800马力的功率输出3.2分钟，1859力的功率输出2.5分钟。

The key indicators of the engine assembled in the Seiko workshop did not meet the standards, and the power output of 1800 horsepower only lasted for 25 seconds.

The two level 9 fitters in the Seiko workshop were in a very low mood. The skills they had always been proud of were not as good as a young one, and they were also entrepreneurs who were not doing their jobs properly.

He couldn't comfort them in terms of technology, and it was impossible to rely on him to assemble future production.The main reason why he started assembling the prototype was to verify the design and materials.

Since there is no problem with the design and materials, the only process left is assembly.

For more than two months, Li Guocheng studied the process with the fitters in the precision workshop.

They installed it first, while Li Guocheng watched from the side and immediately corrected the problems when they found them.For installation of workpieces that require strength, Li Guocheng worked with them to research special support tooling.

When encountering parts that fit closely, everyone initially used the fire method, but the effect was not ideal. In the end, they had to use Xiaogui's liquid nitrogen cooling method, which perfectly solved such problems.

For bearing installation, a special sleeve is designed, which is divided into inner and outer ring sleeves.Some accessories use heating method.

After the entire engine was installed, nearly 100 special toolings were designed, more than 500 volumes of process flow, and more than 300 video files.

Through this installation, a complete set of process specification documents was formed, which accumulated valuable experience for Huaxia equipment assembly and was quickly promoted nationwide.

When Li Guocheng's work in Building 3 came to an end, he received good news when he returned to Building 1. The laser cutter and hole punch were all designed.

Li Guocheng was pestered by Yan Jiefang again and started designing a mask engraving machine.

"Boss, the three-axis CNC machine tool has been designed. Although the accuracy has been significantly improved, it is still a bit lacking. Doesn't it have a laser knife? Can you help me add a laser knife?"

"Haha, you are quite well-informed. How did you ever think of using a laser instead of a carving knife?"

Yan Jiefang looked like a fool, "Boss, everyone knows the processing accuracy of laser. Professor Yuan has talked about this technology many times. Now the person who wants to use the laser knife most on the lithography machine is not me, but Professor Yuan." ".

While the two of them were chatting, Professor Yuan hurried over with his students, "Old Yan... uh, great, Director Li is here too."

Yan Jiefang gave Li Guocheng an expression, "Look, say Cao Cao, and Cao Cao will arrive."

"Look, this is our latest modified laser knife, which can cut and drill."

The double-headed laser generator is more than 1 meter long. Three students are holding it hard. It seems to be heavy.

"That's great. The fixture of the machine tool has been modified. We just want to give it a try." Yan Jiefang stepped forward and greeted Professor Yuan enthusiastically.

When he arrived at the laboratory, Li Guocheng found that Zhang Zhijing and Master Yi were there, and some young people were busy around.

"The boss is here, just in time," Zhang Zhijing shouted happily.

"Xiao Li, you're done," Master Yi turned around and greeted with a smile.

"Well, it's over for now. What's the situation now?"

“There are still problems with the coordination of laser ranging, pneumatic devices, and lead screws, and the accuracy cannot be achieved. In addition, coupled with the laser platform, the impact of environmental vibration on the processing platform has not been solved.

Passive damping and shock absorption solutions are commonly used now, but they amplify low-frequency vibrations, and the effect of high frequencies is also weakened."

Li Guocheng didn't hesitate and asked them to install the laser platform on the rotating shaft and start the equipment.

He put his hands on the platform and slowly felt it, sometimes pushing the platform deliberately, sometimes stamping his feet.After struggling for more than half an hour, he finally understood all the situations.

Then we started technical research again.

In order to train the team, Li Guocheng tried his best to stimulate everyone's thinking in the form of questions.

Another half month has passed, and the new platform transformation has finally come to an end.

Li Guocheng put his hand on the platform again, feeling the shock-absorbing effect of the platform.The people around him were making all kinds of vibrations, no one needed to direct them, everyone knew what to do and when to do it.

There is no way, they have to repeat it many times every day for half a month, and it has become muscle memory.At this point, the brain is no longer needed.

I don't know how long it took, but I suddenly heard Li Guocheng say: "Okay, the vibration residual value has reached the standard, let's stop it."

Everyone didn't react at first, but when Li Guocheng repeated it, everyone burst into loud cheers.I don’t know if I am celebrating success or getting out of the sea of ​​suffering? !
The new damping solution is the active damping damping method. The principle is very simple now. It uses an integral structure combining springs and flexible hinges, and uses multi-layer piezoelectric ceramics as driving elements to achieve negative feedback control.

The core is a piezoelectric drive, which can eliminate or suppress horizontal and vertical vibrations through active control technology, and realize vibration compensation through negative feedback.

It is characterized by compact structure, small volume, no mechanical friction, no gap, high displacement resolution, simple control, and easy to achieve nanometer-level precision.

At the same time, it does not produce noise or heat, and is suitable for various working environments.

Li Guocheng looked at everyone's numb expressions after hearing these characteristics, and could only clap mechanically. He also smiled and said, "Okay, everyone has a three-day holiday, and we will continue after work."

When they reacted, they burst into loud cheers.Then those who should go home go home, and those who should go back to the dormitory go back to the dormitory.

Looking at the empty laboratory, Li Guocheng couldn't laugh or cry.He knew that everyone was being squeezed too hard this time, and he was secretly wary to pay attention to it in the future. After all, no one had a strong body like him.

He rearranged the data in the laboratory and finished the final experimental data.

Just as he was about to leave, he turned around and saw Zhao Ting smiling.

"You haven't been with Xiaoyu for a long time. You should have a good rest for a few days."

Although the couple is always in the same park, Zhao Ting seldom disturbs him and prefers to stay on the first floor.

Li Guocheng took a few steps forward, hugged Zhao Ting into his arms, and sniffed her hair vigorously. A unique fragrance rushed into his mind, and he was shocked, "Honey, I miss you."

"Then go home." Zhao Ting's gentle side can only be understood by her family. In her position, she has always been a cold beauty.

"Go home, wife!" After saying that, she hugged Zhao Ting tightly, as if she wanted to rub her into his body.

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(End of this chapter)