Ji Donglai noticed that Wu Zhen's father's position was listed as deputy director of the steel factory!

It's obviously due to his ability and connections. Wu Zhen has been showing off his relatively high scores these days, while Ji Donglai is flat-mouthed.

"I want to run for our league secretary, and everyone in our dormitory supports me!"

As the military training came to an end, Ji Donglai also started to pack his things, preparing to move some of his things to Wang Jue's shop and work there at night.

The library at the school is very good. You can borrow five books at a time. Ji Donglai didn't need to buy reference books such as the Mechanical Design Manual, so he borrowed them directly from the small factory.

As for the testing of materials, Ji Donglai is looking for opportunities to get acquainted with the teachers in the laboratory, and he regards this as half of his own laboratory.

Ji Donglai was thinking about his century-old plan. He didn't want Wu Zhen to say this. Ji Donglai didn't object, but found that the dormitory was quiet. He looked up and saw that Wu Zhen was looking at him.

"Support! My vote will definitely be for you!"

Looking at Wu Zhen's eyes, Ji Donglai was very bored, secretly thinking that a child who had been spoiled by his parents was even more determined to leave this dormitory.

"I want to run for the school committee, and the monitor also supports me. Let's help each other!"

Ye Tianye took advantage of every opportunity, and Ji Donglai was speechless for a while. He thought it was okay, and immediately expressed his support and let the other party do the rest.

Military training graduation ceremonies are the same in all schools. After finishing the matters here, Ji Donglai is busy preparing to go to Zhongguancun

Over there, Wu Zhen and Tianye settled down and started running wildly.

"Brother Donglai, bring me a shampoo, and I'll pay you back seven yuan!"

Over there, Ye Ye and Wu Zhen were studying the newly purchased mobile phones. Ji Donglai agreed and didn't care, and directly took the things to Wang Jue, and then returned to the small factory.

"This is good. We happen to have a few tolerances here that need to be used. Brother Donglai is a god!"

Ding Aixing and others in the office were calculating the tolerance ranges of several mating parts. Looking at the mechanical design manual that Ji Donglai had brought back, his eyes suddenly lit up.

In the past few days, Tan Xiumei has been sending new products, and Ding Aixing and the others have been working on drawings apart from eating and sleeping.

The pipeline seems simple, but the details are definitely not simple.

Just on Friday, Ding Aixing almost broke an elbow. Fortunately, Sun Li's inspection found it in time, otherwise the tiles would have been completely broken after they were installed.

"Read more books in the future. You all have a good foundation. You all have knowledge in your mind, but you just haven't established the foundation. Once you establish the foundation, you will be able to understand it clearly in minutes! What else happened recently?"

The smell of sweat from Ding Aixing and others came to his nose. Ji Donglai knew that these people were too busy recently, so he handed them the toiletries bought from Carrefour.

"There is an order, boss. Mr. Zhu has placed an order for 10,000 units. It's a bit big. We don't dare to make the decision. Please take a look!"

Ding Aixing took down a drawing from the shelf. It was also a drawing of a sliding shoe. The difference was that the skeleton used a fully welded model.

The installation base is a fifteen-thickness iron plate, and the stand is a five-thickness steel plate.

The above dimensional tolerance range is a bit narrow, and it would be a bit laborious to do it using the stamping process, but it would not be profitable to do it using flame cutting.

As for laser cutting, that is even more of a joke.

Ji Donglai asked Jerry to help him ask about the laser transmitter last week. It has not been settled yet. Once he can find these things, Ji Donglai would not mind asking Zhang Yu for the channel of the machine tool guide rails and building a laser cutting machine by himself.

.

"Eh? Have you checked this standard?"

After looking through the drawings, Ji Donglai finally landed on the title bar. According to the habits of foreigners, there are clearly specified tolerances on the drawings and should be followed within the tolerance range.

If there is no clear tolerance range, just follow the standard on the drawing. 709 is the hot-rolled plate standard.

Then Ji Donglai's steel plate thickness of 16 mm can be made using 15.7.

In this way, the shear force of the steel plate is more than a little smaller.

At least, the material requirement is 699, which means that the material is not necessarily 235, as long as it is in this group, it can be used.

Ding Aixing scratched his head and quickly got the manual that Ji Donglai had brought back. After a long time of hard work, he finally found 699.

"Hey, Dad, please help me see if there are 08f or 20 steel plates in the warehouse. This can be a lot cheaper. I need some here, just hot rolling!"

After dialing his home phone number, Ji Donglai hurriedly explained to Ji Ping.

Ji Ping hurriedly rode his family's bicycle to Yu Wei's warehouse, and there happened to be 25-gauge steel plates available, and 08f was also available! The prices of several types of steel plates were much cheaper than 235-gauge steel plates.

"Okay... Ai Xing, place an order with Boss Yu! Sixteen millimeter 709 hot-rolled plates, three sheets of twelve meters! Three sheets of five millimeters!"

After determining the requirements for the drawings, Ji Dong came over to start quoting.

As a small factory, Ji Donglai has to spend every penny. At this stage, almost all the steel plates produced by Tan Xiumei are full-size plates. Ji Donglai is also planning to use hot-rolled plates in the next step.

After all, it is all money, and now the whole world is short of money.

"Ji Donglai, I have a blueprint here, can you do it?"

Ji Donglai was thinking about how to save money when Tan Xiumei came in with a stack of A4 drawings. Ji Donglai knocked on Cui Mingyan's office, and Cui Mingyan hurried out to make coffee for Tan Xiumei.

Liu Yupeng hurriedly ran out the door, adjusting his clothes as he went. Ji Donglai almost threw the water glass in his hand.

"High-pressure pipeline? This is a supercharger. Damn it! The price can't be lowered. I need to get a plate bending machine, and it's very high-pressure!"

Looking at the pipe with a diameter of half a meter, Ji Donglai directly turned on the computer and opened the 3D software. The fan of the computer began to roar in minutes. Ji Donglai directly used ug to start modeling according to the drawings, but not according to the pattern of the drawings, but the entire

The pipes were cut and assembled piece by piece, completely replicating the construction site.

"so tough?"

Watching Ji Donglai divide the pipe into nine sections, Tan Xiumei looked at the drawing again and realized that she had misunderstood this thing.

"What do you think? This weld has to be guaranteed for three years. If the technique is not absolutely good, I won't dare to weld it! The water pressure here cannot reach it, so I can't test it! It costs at least 5,000 yuan to buy a high-pressure pump, and the test bench is different

It takes a lot of effort to grow things, can you find someone else to do it?”

Looking at the model of this drawing, Ji Donglai retreated in his heart.

The principle of adding seven supercharger blades to the pipeline is the same as the turbocharger commonly used in automobiles. The pressure of the front pipe is too high.

The middle blades also have a lot of pressure, and a little leakage is allowed during welding, but the outer skin must not leak.
Chapter completed!