Simulation: Great Power Technology

After completing the simulation of the fourth stage of Dragon Heart, Ye Zhou did not rush to start the simulation of the fifth stage, for two reasons.

First of all, there are still 4 technologies in my hands. It will take some time to fully digest these technologies. Li, the sedan sedan project of Liming Factory has recently entered the production and manufacturing stage from the initial picture-reading and analysis stage. His work became busy all of a sudden. Every day, he had to travel to various workshops to check the material properties and manufacturing process. After returning home, he wanted to sleep on the pillow. He really didn't have much energy to carry out high-intensity simulations.

According to his plan, he intends to get through the most difficult cold start stage first, and then take time out to complete the last stage of the simulation after the sedan sedan project is mature and the manufacturing process is basically smooth.

This morning, Ye Zhou came to the thermal processing workshop as usual. The previous night, the engineer of the workshop had reserved his time and wanted to ask him to help with the processing of the hollow fan blades without shoulders and wide chords.

After arriving at the workshop, Ye Zhou saw that the engineer named Huang Liangxin who contacted him earlier was already working in his office.

Ye Zhou walked up and knocked on the door. The latter looked up and saw that it was him, and hurriedly stood up and ran out to greet him.

"Ye Gong, I'm really sorry, I was reading the document just now, and I forgot to pick you up..."

"It's alright, don't do those stupid things."

Ye Zhou waved his hand and continued to ask:

"What's the problem with you now?"

"The main problem is the spf/db process. Although we have also made fan blades before, we have never made such a giant fan blade with a length of 1.8m, so there are problems in the operation process and standardization. Please this time Come here, I just want you to help take a look, check and check."

"We have tried two fan blades, but the results have not been satisfactory."

Ye Zhou nodded and replied:

"You don't need to call you yours, just say you. What's the specific problem? Have you conducted a self-examination?"

Huang Liangxin quickly took out a stack of documents from the table, placed them in front of Ye Zhou and replied:

"I have organized two self-examinations and corrected some parts of the operation that do not meet the requirements of the document, but I don't know why, the manufactured fan blades cannot meet the requirements in terms of strength and creep resistance. I am thinking, yes It's not that the heating rate is not enough when we do superplastic, the surface stress of the titanium alloy coating is problematic."

Hearing Huang Liangxin's words, Ye Zhou was stunned for a moment.

A perfectly manufactured turbofan blade under modern industrial technology should not have stress concentration problems. of.

Titanium alloy is a metal with extremely high strength at room temperature, but extremely poor plasticity. It is maddeningly difficult to process it into a three-layer structure hollow fan blade commonly used in modern aviation engines.

Therefore, the mainstream processing technology in the world is to use the superplastic forming + extension method to manufacture. This manufacturing process requires that each part of the titanium alloy be heated at a stable speed to a temperature range that satisfies its superplasticity and can be diffused. The interval is generally between 900 and 1100 degrees Celsius.

However, the specific temperature control needs to consider the properties of the composite material wrapped by the titanium alloy, and the conditions for each manufacturing process are different. Even in the complete document obtained by Ye Zhou, there is no reliable function to describe it, so only Can rely on one experiment.

However, the cost of such experiments is very high, because you cannot judge whether the temperature is appropriate and whether there is stress concentration on the surface of the titanium alloy during the manufacturing process, and can only be measured with professional instruments after it is formed.

The waste of manpower and resources is huge.

If you want to solve this problem, unless there is some instrument that can measure the stress concentration points on the surface of the fan blade during the thermoforming process, so as to eliminate the concentration by changing the local heating rate.

There doesn't seem to be any type of instrument in the world that can do this right now.

----Except Ye Zhou himself.

Thinking of this, Ye Zhou asked:

"Do you have a trial production plan today? Take me to see the heat treatment process."

Hearing Ye Zhou's words, Huang Liangxin nodded quickly, and after only half an hour, the two of them were already standing in the heat treatment workshop with full protection.

The production workers carefully put various materials into the lathe according to the requirements of the operating documents. They monitor every value on the screen. Once the value jumps beyond the range required by the drawing, they need to report to the alarm immediately.

The more such warnings, the lower the manufacturing success rate of the fan blade.

Everyone stared nervously at the numbers, except for Ye Zhou.

He wasn't looking at the system readout, he was looking at the blade itself in the process of casting in the machine's viewing porthole.

At this time, the manufacturing process has reached the critical stage of titanium metal covering, and the temperature is gradually rising. Ye Zhou is staring at the surface of the fan blade. The talent of the "Master of Structures" is running wildly, trying to find the possible appearance from the fan blade. stress concentration point.

Such a stress concentration point is different from any situation Ye Zhou has been exposed to before. Its concentration is too low, and the signal it brings to Ye Zhou is extremely weak, and he has to constantly eliminate those because of Only temporary stress concentrations caused by incomplete ductility of the titanium alloy.

After staring at the leaves for an hour, Ye Zhou's eyes suddenly lit up.

"The temperature at the shoulder of the leaf is low, adjust the local temperature and increase it by 100 degrees first."

"Okay, adjust the parameters!"

Huang Liangxin said to the operator on the side.

As the temperature gradually increased, the stress concentration points that appeared obvious signals in Ye Zhou's eyes gradually disappeared.

He nodded with satisfaction, and continued to look at the leaves in the porthole.

This superplastic forming machine is a machine tool independently developed and manufactured in China. The tension and compression load is 25kn, the torque is 200nm, the 25kn actuator stroke is 4inch, the torsion angle of the torsion actuator is 270°, and the ambient temperature adjustment and control range is -75 ~ 1400° c. It belongs to the most advanced batch of similar machine tools. Without this machine tool, the imitation of ge-9x is basically impossible.

A few hours later, Ye Zhou's eyes were already sore, and the blade finally took shape and entered the cooling and fine polishing stage.

Ye Zhou and Huang Liangxin returned to the office. The latest test results were still several hours away. He had two cups of tea with Huang Liangxin, and after asking about the progress of the processing, he turned his head and left the workshop.

He can't wait here, and there are many workshops with the same problems as Huang Liangxin waiting for him to solve.

He was busy until after six o'clock in the afternoon. Ye Zhou left the work area to eat in the canteen of the factory. However, as soon as he stepped on the canteen, someone chased him from behind and grabbed his arm.

"Ye Gong! It's done! The leaves are done!"

The person who came was Huang Liangxin, and his face was covered with a smile of undisguised surprise.

He never imagined that the young man in front of him could solve problems they couldn't find from the data just by visual observation.

---- Of course, this is not a fantasy, but this ability is often only found in those old engineers with decades of experience.

The young man in front of him was only 23 years old.

Ye Zhou was not as excited as he was, but asked calmly:

"Have the process parameters been recorded? Can it be cured?"

For Ye Zhou, it is not important to be able to solve the problem once. What is important is to solidify the solution to the problem, so as to avoid the recurrence of similar problems in the subsequent process.

Otherwise, do you still stare at each leaf you make in the future?

That's too nonsense.

Hearing Ye Zhou's question, Huang Liangxin nodded again and again:

"It's recorded! We will organize the whole study today, and we will conduct another experiment tomorrow. If it is successful, this process can be solidified!"

"Okay. Let's go, let's eat."

Ye Zhou patted Huang Liangxin's arm lightly, and the latter followed him into the cafeteria with a happy face.