Chapter 99

"OK, let me have a look first and study it together." Liu Chi nodded, took the USB flash disk handed over by Li Haiqing and inserted it directly into his office computer.

When the four saw Liu Chi operating the computer, they also surrounded him.

Liu Chi clicked several points on the screen, found the folder and clicked to open it.

Half a minute later, Liu Chi quit the computer and said, "this screen is too small and inconvenient. Go to my laboratory to see it."

“......”

"Horizontal trough."

"Shit, Liu Chi, you are an advanced laboratory."

"How much is it?"

"Local tyrant."

"All right, get down to business first, and then you can build one yourself." Liu Chi opened the control computer of the service cluster and said.

"You can say it's simple. How much does it cost?"

"Not much. There is a server cluster on the upper layer, more than 100 million. These devices add up to about 1 billion."

"Shit...!"

"Stop talking. It's disturbing."

“！！！”

“......”

Liu Chi shook his head reluctantly, inserted the USB disk into the USB interface, and clicked the folder he had just seen.

"Are you using three tricks?" Liu Chi looked a few times, frowned and asked.

"Yes, the three movement can well ensure the accuracy and balance."

"The three movement can really ensure the accuracy, but if the accuracy of the rotating shaft and bearing is not good, it will be counterproductive." Liu Chi magnified the rotating shaft position, pointed to the bearing position on the screen and said, "what is the accuracy here? Does it meet your design requirements?"

"The data is OK."

"No problem with the upper and lower four bearings?"

"No problem."

After watching it for half an hour, Liu Chi asked a little puzzled, "have you ever considered the role of temperature?"

"Temperature???"

"You didn't think about it?" When Liu Chi finished, he added, "heat expansion and cold contraction, big brother?"

"We will naturally consider this, but this is the bearing with the highest precision we can buy, and we asked the manufacturer, and they said it can meet our requirements." Chen song is a little underpowered.

"They said, you believe it. Have you been tested?"

"We are not you. We have a ready-made laboratory." Li Haiqing looked contemptuous.

"That's right." Liu Chi nodded and said, "if the accuracy can't be reached, it's basically a material problem."

"The main reasons for the accuracy of machine tools are normally divided into three points; 1. Change of workshop ambient temperature; 2. Motor heating and mechanical motion friction heating. "

"3. The temperature rise of each part of the machine tool is uneven due to the influence of cutting heat and cooling medium; Lead to changes in the shape accuracy and machining accuracy of the machine tool. "

Seeing that the three did not speak, Liu Chi said, "let me take an example to process 70mm on an ordinary precision CNC milling machine × For 1650mm screw, the cumulative error of the workpiece milled from 7:30 a.m. to 9:00 p.m. can reach 85m compared with the workpiece machined from 2:00 p.m. to 3:30 p.m. "

"Under constant temperature, the error can be reduced to 40m!"

"For another example, a precision double end grinder for double end grinding 0.6 ~ 3.5mm thick thin steel sheet workpiece shall process 200mm during acceptance × 25mm × The 1.08mm steel sheet workpiece can achieve the dimensional accuracy of mm, and the bending degree is less than 5m in the whole length. "

"However, after continuous automatic grinding for 1h, the size change range increases to 12M, and the coolant temperature increases from 17 ℃ at startup to 45 ℃."

"Due to the influence of grinding heat, the main shaft journal is extended and the front bearing clearance of the main shaft is increased."

“......”

"So there's no way to solve it?" Li Haiqing asked reluctantly.

Liu Chi thought that he had something to do with it. Maybe it had a way, so he asked the three people, "by the way, what level of bearing are you using now?"

“P2！ This is the highest level you can buy. "

"What we buy is imported." Chen Song added.

"That should be no problem, but in my opinion, the accuracy of your bearing still can not meet the requirements of your design. Under the action of tripartite force, if it is at room temperature, the accuracy error will at least exceed 0.05mm."

"And I just read your design requirements. Your accuracy is 0.03mm."

"What should I do? This is the most important and high-precision bearing?" Li Haiqing scratched his head in embarrassment.

"If there is no way to solve the bearing problem, I think the accuracy of using one mechanism is higher than that of using three."

"Think about it. There are only two bearings with one movement. Now you use three movements, and the movement has six bearings. Plus four on the rotating shaft, it becomes 10. Tolerance + tolerance. You also have to consider the role of force. Is the error not greater?"

"I think what Liu Chi said is reasonable." Li Haiqing said to Xiao Yunhao.

"Why don't you try one first?"

"Yes."

"I'll also ask you if there are bearings and movements with better accuracy." Liu Chi finished and closed the folder on the screen.

"OK."

"Let's go. It's almost time for dinner. I'll treat you to dinner."

"Wait, wait, one hot kettle for each person."

"You..." Liu Chi rolled his eyes.

"Fight the landlord and divide the land. When you come, you must take one back. Who makes me unable to grab it online." Li Haiqing's righteous way.

"OK, give you one." Liu Chi shook his head helplessly.

“......”

After sending these cheeky guys away, Liu Chi called Chen Luguang and mentioned the machine tool and bearing.

Naturally, Liu Chi's request is highly valued, and naturally he is also concerned about it.

Who knows if there will be any black technology.

After receiving the movement and bearing, Liu Chi called Chen song to pull it away.

Chen Song, these guys naturally entered the line of sight above.

......

With the passage of time, it is not time for the acquisition alliance to find a corresponding solution.

On the Internet, there was a news that surprised his chin.

Jingxin group was blocked by mysterious forces.

The share price fell directly to the limit at the close of the day!

......

“？”

“？？？”

"Did you find out? Who is it? " Yu Kang angrily asked the assistant who came in.

"Mr. Yu, I haven't found out yet."

"No matter how you do it, you must find out who it is." Yu Kang grinned with a black face.

10%, the whole company directly evaporated 5 billion. Are you kidding? If you don't live again, the whole Jingxin will fall on the wall.

"Yes!"

......

The next day!

At the close of yesterday afternoon, the news that Jingxin suddenly smashed the plate has spread. Everyone craned their necks and waited to see what happened today.

That local tyrant is so domineering. So cruel, I don't know if today will

Countless people are staring.

9.30！

the opening quotation!

"Boom..."

At the moment of opening, a super big order was smashed directly!

It's like a nuclear bomb!

The salted fish that wanted to struggle upward was directly fried into a dead fish and couldn't turn over.

10%

Limit.

！！！

One by one.

This, this, this is too overbearing~~~

Too cruel!