Return to the exciting era of 1999

Chapter 136 Is A Little Difficult!

Ji Donglai noticed the column of Wu Zhen's father's position, the deputy director of the steel factory!

Obviously because of money ability and connections, Wu Zhen has been showing off his relatively high scores these days, and Ji Donglai has a flat mouth.

"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, and planned to move some of them to Wang Jue's shop, and he would work there at night.

The library on the school side is very good, and you can borrow five books at a time. Ji Donglai just didn't need to buy reference books such as mechanical design manuals, and borrowed them directly from the small factory.

As for the inspection of materials, Ji Donglai was going to find an opportunity to get acquainted with the teacher in the laboratory, and he regarded this place as his own half of the laboratory.

Ji Donglai was thinking about his century-old plan, and didn't want Wu Zhen's words. Ji Donglai didn't object, but found that the bedroom was quiet, and looked up to see Wu Zhen looking at him.

"Support! I definitely vote for you!"

Looking into Wu Zhen's eyes, Ji Donglai was very annoyed, secretly thinking that the child who was spoiled by his parents strengthened his determination to leave this dormitory.

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

Ji Donglai was speechless for a while when Tianye saw the stitches. He thought that he was doing enough, and immediately expressed his support, and let the other party do the rest.

The military training graduation ceremony is the same thing in every school, after dealing with the affairs here, Ji Donglai is busy preparing to go to Zhongguancun

Over there, Wu Zhen and Tian Ye started running wildly after their positions were settled.

"Brother Donglai, bring me a shampoo, and I'll give you the money for seven yuan!"

Tian Ye and Wu Zhen were studying the newly purchased mobile phone. Ji Donglai promised not to care, and directly took the things to Wang Jue, and then returned to the small factory.

"That's good. We happen to need a few tolerances here. Brother Donglai is a god!"

Several people in the office Ding Aixing were calculating the tolerance range of several fittings. Looking at the mechanical design manual brought back by Ji Donglai, their eyes lit up.

In the past few days, Tan Xiumei has been sending new products, and Ding Aixing and the others are sharing pictures besides eating and sleeping.

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

Just on Friday, Ding Aixing almost scrapped an elbow. Fortunately, Sun Li checked and found it in time, otherwise the tiles would be completely scrapped.

"Read more books in the future. You all have a good foundation, and you have knowledge in your mind, but you haven't established the foundation. You can understand it in minutes after you establish the foundation! Is there anything else going on recently?"

The smell of sweat from Ding Aixing and the others came from his nose. Knowing that they were too busy recently, Ji Donglai handed them the toiletries they bought from Carrefour.

"There is an order, Boss, there is an order of [-] units from Mr. Zhu's side, which is a bit big, we dare not make decisions, please show it!"

Ding Aixing took down a drawing from the shelf, which was also a drawing of a sliding boot, but the difference was that the frame was fully welded.

The installation base is fifteen thick iron plates, and the stand is five thick steel plates.

The upper dimensional tolerance range is a bit narrow, and it would be a bit laborious to use the stamping process, but it would not be profitable to use flame cutting to make this thing.

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

Last week, Ji Donglai asked about the laser transmitter for himself from Tuojili, and it has not yet been settled. Once he can find these things, Ji Donglai doesn’t mind asking Zhang Yu for the channel of the machine tool guide rail, and builds a laser cutting machine himself. .

"Eh? Have you checked this standard?"

After reading the drawings, Ji Donglai finally settled on the title bar. According to the habit of foreigners, the tolerances clearly stipulated on the drawings should be followed within the tolerance range.

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

Then Ji Donglai's steel plate thickness, [-]mm, can be made with [-]mm.

In this way, the shear force of the steel plate is reduced by more than 01:30 points, and the material requirement is 699, which means that the material is not necessarily Q235, as long as it is this group, it can be used.

Ding Aixing patted his head and hurriedly brought the manual brought back by Ji Donglai. After a long time, he finally found 699.
"Hey, Dad, help me see if there are 08F or 20 steel plates in the warehouse. This can be much cheaper. I need some here, just hot rolling!"

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

Ji Ping hurriedly rode his family bicycle to Yu Wei's warehouse. There happened to be a No. 25 steel plate that had been opened, and 08F also had it!The prices of several steel plates are much cheaper than 235.

"Okay... Ai Xing, place an order with Boss Yu! 709mm 12 hot-rolled plate, three sheets of [-]m! Three sheets of [-]mm!"

After confirming the drawing requirements, Ji Donglai started to quote.

As a small factory, Ji Donglai must pay every penny.At this stage, almost all the steel plates on Tan Xiumei's side were made of full-size plates, and Ji Donglai planned to use hot-rolled plates in the next step.

After all, it's all money, and now the 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, Tan Xiumei came in with a stack of A4 drawings, Ji Donglai knocked on Cui Mingyan's office, Cui Mingyan hurried out to make coffee for Tan Xiumei.

Liu Yupeng ran out in a hurry, arranging his clothes while walking, and almost threw the water glass in Ji Donglai's hand.

"High-pressure pipes? This is a supercharger, what the hell! The price can't be lowered, I have to get a plate rolling machine, and it's high-pressure!"

Looking at the pipe with a diameter of half a meter, Ji Donglai directly turned on the computer, opened the [-]D software, and within minutes the computer fan started to roar.Ji Donglai directly used UG to start modeling according to the drawings, but instead of following the pattern of the drawings, he cut the entire pipeline and assembled it bit by bit, completely restoring the construction site.

"so tough?"

Watching Ji Donglai divide the pipe into nine sections, Tan Xiumei looked at the drawing again, only to realize that she thought this thing was too simple.

"What do you think? This weld has to be preserved for three years. If the technique is not absolutely good, I dare not weld! The water pressure in my place is not up to the mark, so I can't experiment! Buy a high-pressure pump for at least 5000 yuan, and test benches of various types. Things take a lot of work, can you find someone else to do it?"

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

The principle of the pipeline with seven booster plates is the same as the turbocharger commonly used in cars. The pressure of the front pipe is too high.

The blades in the middle are also under a lot of pressure, and a little leakage is allowed during welding, but the outer skin must not leak.

The weld seam needs to be polished and smooth, and the concentricity of the pipeline still has requirements. If you want to do this, it will really test your strength.

　Thanks to Guo Xu, icer1225, Youfang Daoren Yousifang for their support

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(End of this chapter)