Chapter 225 Working Together
The air in the workshop was like a compressed spring, so taut that one could hear each other's heartbeats.
Jiang Haitang placed the nickel alloy gasket on the workbench. The metal surface shone coldly under the light. Her fingertips ran across the artificially polished diagonal lines, and she suddenly looked up at everyone.
"Country Y has accurately calculated that we don't have replacement parts, let alone the ability to crack their algorithm. But they don't know that we Chinese never give up. I believe that with our joint efforts, we will definitely solve the problem."
"Haitang, if we work together, we can definitely do it!" Gu Yundi said in a firm tone.
This country has been controlled by those so-called foreign experts for a long time. If it can be successfully resolved this time, it will be a relief.
"Haitang, our textile factory has a few talented people. Maybe we can ask them to help." Lu Liangchen suddenly said.
Jiang Haitang was stunned.
Factory treasure?
What is Factory Treasure?
This is what Jiang Haitang thought and asked.
"We have several retired masters in our factory. One is Master Liu, who used to make gaskets for aircraft engines. Another is Master Wang, whose machine tools can produce mirror-like precision. And there is also Master Li, a veteran expert in material mechanics."
Jiang Haitang really didn't know that there were so many powerful people in the factory.
For a moment, she wondered if she had heard it wrong.
"Really? Can they find it now?" Jiang Haitang's tone was filled with surprise.
"Okay, I'll arrange for someone to invite them over immediately. No, I'll go myself. Haitang, talk to Teacher Yun first to see if there's any good solution."
Jiang Haitang nodded. She was originally 60% sure that she could complete the task on time. Now, if she could add a few more people, she would be even more confident.
"Teacher Yun, let's study this..."
Jiang Haitang didn't waste any time and immediately pulled Gu Yundi over to start a discussion.
Li Jingcheng and a few others listened attentively and took note of the key points mentioned by the two people.
Jiang Haitang grabbed a pencil and drew an arc on the blueprint. "We need three replacement parts: the spindle bearing seat needs to be reworked, with a tolerance of 0.03mm; the cooling oil pipe interface needs to be replaced with chrome-vanadium steel, which has better wear resistance than the original brass parts; and most importantly, this temperature control module..."
She tapped her fingertips hard on the simulated curve.
"Their compensation algorithm is hidden in a third-order differential equation, and the parameters must be inferred using the calculus of variations."
"Differential equations?" Duan Changhe scratched his head and nearly dropped the wrench in his hand. "Isn't that something in college textbooks? I used to think it was useless and didn't really understand it."
Jiang Haitang certainly didn't think of asking Duan Changhe and Li Jingcheng to solve this problem.
Although these two graduated from European universities, they were workers, peasants and soldiers universities after all, and the knowledge they learned was relatively limited.
As for Jiang Haitang himself, he only knew this principle.
Her foundation is actually not as good as Li Jingcheng and Duan Changhe. She is the type of player who is taking last-minute lessons.
If she were really asked to figure all this out, she really wouldn't have the confidence, let alone be arrogant enough to think that she could solve this problem.
However, as a professor who once taught at a university, Gu Yundi should be able to do this.
"Teacher Yun, can you help me with this? I'm a little weak in this area!"
When Gu Yundi heard Jiang Haitang say this, a smile flashed across his face.
"I thought you were omnipotent, but it turns out there are things you don't understand!"
"Everyone has shortcomings. There are many things I don't understand."
"So I need your help, Teacher Yun." Jiang Haitang tore off a piece of calculation paper and quickly wrote down a series of formulas. "Master Gu, can your precision lathe machine cut chrome-vanadium steel? The hardness might exceed the standard."
Gu Yundi took the blueprint, his brows knitted into a knot. "Ordinary turning tools definitely won't work, but we just received a batch of tungsten steel tool heads, leftover from a rush job at the military factory. But we have to modify the tool holder overnight, otherwise the cutting accuracy won't be enough."
He turned to the student he had brought with him and said, "Xiao Wang, go to the machinery factory and ask for permission to move out that old Soviet-made lathe. It has a heavy bed and is more earthquake-resistant than a new one!"
Just as a series of things were arranged here, Lu Liangchen arrived at the door with an old comrade.
The old comrade stood at the door with a cane. The cuffs of his army green Mao suit were frayed, but his eyes behind his glasses were surprisingly bright.
"Haitang, this is veteran expert Li Jiandong."
"Hello, Teacher Li." Jiang Haitang immediately stepped forward to greet Teacher Li.
"I never thought that even at my age, I still have the time to contribute to the factory. Xiao Jiang, I know you're a very capable kid. If there's anything you need from me, don't hesitate to tell me."
Jiang Haitang could tell that the old comrade was speaking from the heart. After all, the spirit of dedication of the older generation to the country, the collective and the people was unquestionable.
Jiang Haitang then talked about the current difficulties they were facing.
"Let me see the differential equation that Xiao Jiang mentioned." Mr. Li spoke directly without any hesitation.
Gu Yundi immediately took over some of the records and calculations on the draft paper.
Elder Li stared at Gu Yundi for a few seconds.
Lu Liangchen hurriedly introduced: "Mr. Li, this is Mr. Yun, an external engineer from the machinery factory."
However, Mr. Li looked at Gu Yundi thoughtfully for several more times. Obviously, he saw something.
"Hello, Mr. Li. It's an honor to have this opportunity to overcome these difficulties with you." Gu Yundi immediately stepped forward and shook Mr. Li's hand.
Mr. Li smiled and didn't say much.
Let's lower our head and start to read the relevant information that Gu Yundi handed to him.
Jiang Haitang then realized that Mr. Li's fingers, which were holding the documents, were trembling slightly, not because of fear, but because of excitement.
Lu Liangchen saw Jiang Haitang staring at Mr. Li, so he moved closer to her and gave her a brief introduction to Mr. Li's situation.
Mr. Li was once a top student at Peking University and had studied in the United States. However, after he returned, due to some personal reasons, he had to work as a technician in a textile factory under an assumed name.
It is also for this reason that Mr. Li has been able to live in peace and safety over the years.
This information was secretly told to Lu Liangchen by Director Hu after he figured it out.
"This is a typical nonlinear hysteresis system." The old man pointed to the inflection point of the curve. "Country Y was clever. They hid the compensation coefficient in the remainder of the Fourier series. On the surface, it looks like a second-order equation, but it's actually a third-order implicit function."
He took out a yellowed copy of "Engineering Mathematics" from his canvas bag. Between the pages was a piece of calculation paper from 1956, and the handwriting on it was exactly the same as it is now.
"When we were renovating the rolling mills at Anshan Iron and Steel, we encountered similar traps. They've done this kind of thing over the years to hinder us. Almost every factory has experienced this kind of bullying."
The old man was filled with indignation when he talked about this history.
Jiang Haitang's eyes lit up: "You mean using Laplace transform?"
"That's more than that." Old Li drew a coordinate system on the back of the blueprint. "We also have to consider the temperature difference between day and night in the northwest. Every one-degree temperature fluctuation changes the thermal expansion coefficient of the metal. This is a variable they didn't calculate, and it's exactly what we can do to defeat their calculation."
Mr. Li is indeed an expert in this field. After he started talking, he became more and more excited.
"I'll go ask the other two masters first. Haitang, I'll leave this to you." After Lu Liangchen finished speaking, he set off immediately.
On this side, Jiang Haitang and others are also working hard to advance the progress of the work.
Lu Liangchen arranged for someone to bring them lunch, which was steamed cornmeal buns and fried pickles from the cafeteria. He also prepared a portion of braised pork and a portion of fried tofu with minced meat for them.
Even when they were eating, several people did not stop working, but discussed while eating.
We had just finished our meal when Master Liu arrived.
After Master Liu finished, he did not say a word and immediately got down to work.
Master Liu spat into his palm, rubbing his rough palm against his overalls. "Girl, what are you going to do? Back when I was repairing fighter jet turbines, I've worked on gaskets half as small as this. Worst case scenario, I'll just stay awake tonight!"
Several old fitters who came behind him after hearing the news nodded one after another, and the scrapers and oilstones in the toolbox made crisp sounds as if responding to this promise.
Jiang Haitang briefly explained the situation and Master Liu started working immediately.
The scraper in his hand moved rapidly, scraping out fine silver flakes from the nickel alloy billet, which fell on the oily workbench like a handful of stars.
"Girl, do you think the lines are even?" He held up the unfinished gasket, and under the light he could see fine concentric circles.
"When I was repairing bomber engines, the requirements were even higher. I stared at the vernier caliper and my hands were as steady as a rock." Master Liu's face was full of pride when he talked about those days.
Jiang Haitang was about to say something when he suddenly heard a loud "clang" coming from the machine tool.
Gu Yundi squatted on the ground with his arms folded, and the turning tool next to him broke into two pieces.
"Teacher Yun, are you okay?"
"I'm fine, it's just that chrome-vanadium steel is too hard, and the tungsten steel cutter head can't handle it." He wiped the sweat off his face. "At this rate, I won't be able to machine a qualified joint in three days."
The workshop suddenly became quiet, with only the hum of the idling lathe.
"Use flame quenching!" Old Li suddenly spoke up. "Burning the steel billet until it's dark red, then blasting it with cold water, can reduce its hardness by 30%, but its toughness remains the same. Old Gu, have you forgotten we used this method on the pump rods of oilfield trucks in 1965?"
After saying this, Mr. Li seemed to remember something and said quickly, "I was too anxious and thought you were an old friend of mine."
Gu Yundi laughed and said, "A name is just a title. What does right or wrong have to do with it?"
Jiang Haitang finally understood that these two people must know each other and should have a good relationship.
Half an hour later, a simple quenching table was set up in the corner of the workshop.
The oxyacetylene flame spewed out blue-purple flames, burning the steel billet red like a piece of melting amber.
An old fitter was waiting nearby with a bucket of water. When Gu Yundi shouted "release", he suddenly pushed the workpiece into the cold water. White mist rose with a hiss, carrying a strong iron smell.
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