It is very convenient to go to the city's steel plant now. At Tao Guangming's driving speed, it will take more than an hour.
Li Wenjun customized special steel bars, which expanded the variety of steel bars at the city steel plant, so the factory director admired him very much.
At this time, he said that he wanted to pour a cast iron component, so the factory director vacated a small workshop for him and sent two experienced old workers to him.
The workers had all made molds for cast iron parts, and after listening to Li Wenjun explain it once, they understood what he was going to do.
Li Wenjun also brought the engine cylinder that Mr. Tang gave him and asked the workers to make a sand mold to see how accurate it was.
Then the two workers started busy.
A worker pours a special mud on the wood, waits for it to dry, burns it in a furnace, and then takes it out to cool.
The wooden molds were burned down to ashes. Pour water into the pouring hole and clean it a little, and you will have a perfect mold. Then pour the cast iron water in, cool and remove the mold.
Another worker followed the most common method of pouring sand to make a mold, using the engine cylinder that Li Wenjun brought to pour the mold, pour it, and remove the mold.
It takes two to three hours to do the whole set.
While the cast iron parts were cooling, Li Wenjun and the others went to have lunch and came back to measure the accuracy. The accuracy of the one made using the vanishing method basically meets the requirements, but the sand mold is much worse.
At first Tao Guangming was doubtful about Li Wenjun's methods, but now he only admires them.
He said: "This method is good, but it is too time-consuming. If I keep letting Uncle Li do this, I'm afraid it won't work."
Li Wenjun naturally knew this.
This time he was willing to let Li Changming do it, just to verify whether they could make components that met the accuracy requirements.
Now it is proven that it is possible.
It depends on how to mass produce it.
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When the director of the factory heard that Li Wenjun and the others were making automobile engine cylinders, he came over and asked, "Comrade Li Wenjun, which expert did you ask to make the wooden molds inside?"
Li Wenjun said: "My father and the technical staff made it together."
The factory director blushed upon hearing this: "I didn't expect that Li Wenjun's father could make such precise things by hand."
Li Wenjun smiled: "No, they worked for many days and scrapped many before they made three. It was not easy."
The factory director thought for a while and said: "I'm really ashamed. I'm not as good as an old carpenter with a spirit of research. In fact, we also want to make this kind of precision casting, but we haven't been able to overcome the difficulties. If the lost wax method can be used, let's try it too. Don’t worry about leaving this subject to us. You can tell us the dimensions and accuracy. We will do it, and you will check it when it’s done.”
Li Wenjun was pleasantly surprised and held the factory director's hand: "This is better. You are all experts in precision pouring. If you are willing to put in effort to overcome these problems, you will not worry about running out of business in the future."
In fact, the city's steel factory faces the same problems as the city's garment factory, with few product types and low technical levels.
In the past two years, driven by Li Wenjun, the technology of thin-walled steel plates and special steels has been continuously improved. Especially this time, the production and application of special steel bars for expressways gave the factory director hope.
Everyone knows that the north-south artery must be connected. By then, special steel bars, steel plates and various alloy steel components will be in large demand.
Until then, it's wise to be prepared.
Li Wenjun seems to be the only one who knows exactly what kind of steel is needed for road construction.
That's why the factory director deliberately built a relationship with Li Wenjun and took the initiative to take on the task of overcoming difficulties.
The factory director said: "Comrade Li Wenjun will come to the factory frequently to guide the work."
Li Wenjun thought for a while and said: "I will send a person over, please help arrange food and accommodation, and let him study the casting process of this engine with your workers. Clay green sand process, lost wax method, these can be tried. The most important thing is to achieve mass production while ensuring accuracy.”
The factory director said: "Okay, it would be better if Comrade Li Wenjun could send technical personnel."
-----
After Li Wenjun returned, he asked Liu Dongsheng to take the cylinder drawings to the city's steel plant.
The director of the city's steel plant simply assigned those two workers and this small workshop to Li Wenjun.
Li Wenjun paid allowances to two workers alone.
The workers are also very happy and motivated.
Liu Dongsheng was determined to conquer this, and naturally he wanted to live in the workshop.
Li Wenjun also specially told the factory director: "Please help me ask the comrades workers to pay attention to Comrade Liu Dongsheng and ask him not to work too hard to avoid problems."
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The fitter shop here has made all other parts of the engine according to the drawings given by Li Wenjun, and a template for inspection has been made for each part to facilitate mass production inspection in the future.
Master Qian asked Li Wenjun: "What else should I do?"
Li Wenjun said: "There are a lot of things to make, but as for the size, I have to talk to someone first before I can get it. That guy is holding a chicken that lays golden eggs. I don't know if he is willing to part with it."
Master Qian asked: "Who is it?"
Li Wenjun didn't answer, but suddenly stood up, walked to the corridor, and said to Tao Guangming, who was moving stones below again: "Hey, let me borrow your car and measure the dimensions."
Tao Guangming waved his hand: "It's up to you. You don't need to tell me about such a trivial matter."
Li Wenjun said to Master Qian: "Okay, it's time to work."
-----
When he got off work in the afternoon, Li Wenjun said to Tao Guangming: "I will personally cook tonight and make delicious food for you."
When Tao Guangming heard this, he felt as if he had been stung by an insect, and immediately took two steps back: "To be courteous for nothing is to be either a traitor or a thief. You must have taken a fancy to something of mine again."
Li Wenjun smiled brightly: "How come? Do I look like that kind of person?"
Tao Guangming said: "Like."
Li Wenjun sighed: "Oh, Captain Ji said he wanted to eat pickled fish. I managed to get the fish. It's not easy in the winter."
Tao Guangming hesitated: "Did she say she wanted to eat pickled fish?"
Auntie's cooking is not bad, but it's still not as delicious as Li Wenjun's.
It's strange, this guy doesn't often do this, but he can do it well.
And no matter what it is, as long as he wants to do it, he can do it well.
It’s so infuriating.
Just like this pickled fish, the same fish, the same pickled cabbage.
The fish cooked by Li Wenjun was smooth, tender and delicious, with no muddy smell and no thorns at all.
Ji Rushi would tell Tao Guangming every time she was greedy, and then Tao Guangming would salivate and ask Li Wenjun to do it.
Considering Ji Rushi's pregnancy, Li Wenjun was willing to work a bit and reward his family.
Li Wenjun said: "That's right. I thought that cooking a fish is just cooking anyway. Why not cook other dishes and eat them together."
Tao Guangming knew that Ji Rushi's favorite place to eat was Li Changming's place, which was crowded and fun. Li Wenjun was so rich, and Li Wenjun had everything he had, so Li Wenjun wouldn't want to kill him.
Let’s go eat first and then talk about it. After eating, he wiped his mouth, patted his butt and left. Li Wenjun couldn't do anything to him anyway.
Tao Guangming hesitated: "Then go and eat?"
Li Wenjun laughed like a goose: "Uh-huh, look at how cautious you are, I can still eat you."
