Start with the aviation industry

Chapter 157 Centrifugal Impeller Made by Phoenix
Lin Feng had lunch at his sister's house.

Of course, it was Han Dingkang who did the cooking. This time, he brought a lot of things from home, such as bacon, sausages, cured fish, etc., as well as native eggs, two native chickens, and some other things.

Han Dingkang quickly prepared a few dishes. In the afternoon, he prepared to stew chicken and drink delicious chicken soup in the evening.

We sit and eat together.

Just now, when Han Dingkang was busy in the kitchen, Lin Qiong went to the game hall. Liu Xiao'e told her that business was very good during the Spring Festival, with a daily turnover of more than 1000, so she was relieved.

Without worrying about the game hall business anymore, Lin Qiong asked about Lin Feng's personal affairs, "Brother, where is your pretty little apprentice, are you talking about someone?"

Lin Feng smiled and said, "Sister, how could you have such an idea, there is nothing between us."

Lin Qiong had an expression of disbelief, and wanted to continue asking a few more questions, but Lin Feng interrupted, "Sister, you don't need to worry about my affairs, as long as you manage the game hall well."

Actually, Lin Feng didn't want to talk about it. During the few days of the Spring Festival, he really missed Hu Xiaoxiao a little bit.Especially since the day before yesterday, I can dream of her when I sleep. Lin Feng asked himself more than once, if I have feelings for Xiaoxiao.

Lin Qiong didn't ask Lin Feng any more personal matters, but told him to come over for dinner in the evening. Han Dingkang would stew a local chicken and stir-fry a few more dishes.

After eating, Lin Feng went back to his dormitory. Maybe he was a little tired from driving, so he lay on the bed and prepared to sleep.

Before falling asleep, Lin Feng thought of Hu Xiaoxiao again, has she arrived at the dormitory, or is she still at home, a girl, the distance is not too close, do you want to pick her up.

Soon, Lin Feng gave up his plan to drive there to pick her up. In this era of lack of information, if she had already set off, wouldn't he be in vain.

Gradually, Lin Feng fell asleep, maybe he was really tired after driving for three or four hours, and fell asleep in a while, sleeping very sweetly, with a little smile on his mouth, I don't know it was a dream Seeing something happy, could it be that he saw Hu Xiaoxiao in his dream.

Where is Hu Xiaoxiao at this time?

She was on a bus into town.Walk a few kilometers from their home to the town, there is a bus stop there, and several buses pass by there every day, and you can take the bus to the Phoenix Factory, because these buses all pass through the Phoenix Factory.

She was sitting by the window, staring out of the window in a daze, but her mind was full of Lin Feng's shadow.

She didn't feel this way before, because she was with Lin Feng almost every day. During the few days of the Spring Festival, she had a dull life, and her mind was full of Lin Feng.

What she wanted to see the most was Lin Feng, thinking in her heart, at this time, has Brother Lin arrived at the unit, or is he still on his way to the unit.
After bumping for an hour, the bus finally stopped at a stop in Phoenix Factory. Hu Xiaoxiao got out of the bus with a big bag, looking quite struggling, and it seemed that there were a lot of things in it.

What's inside, it's basically their own homemade things, all stuffed in by her parents, a large part of which was specially brought to Lin Feng by her parents.

finally reached.

Looking up at the collective dormitory not far away, Hu Xiaoxiao looked at the time again, it was past three o'clock in the afternoon, and thought in her heart, is brother Lin here at this time, should I go to his dormitory to find him.

In the end, yearning defeated everything, Hu Xiaoxiao carried the big bag to the door of Lin Feng's dormitory, raised her hand and knocked on the door.

Lin Feng had already woken up from a nap, and was reading a book at the desk, a professional book on turboshaft engines.

From last year to this year, Lin Feng had already read several such professional books. Whenever he could find such books, he would not say a word, and read them again.

After reading these few professional books, the turboshaft engine in his mind became clearer and clearer, and the design technical outline was almost ready to come out, and he planned to find time in the future to write out the design technical outline in person.

For aero-engine design, first determine the design technical outline, determine the design scheme, engine performance parameters and dimensions, etc., then design the overall design, draw the general design drawing, and finally develop the local detailed design.

After the design is completed, design verification is required, or design verification is required during the design development process.The entire design verification process is the most time-consuming, ranging from two to three years, to three to five years, or even eight years, ten years is normal.

Repeated design verification, repeated revision and improvement of the design based on the verification results, and finally the design and finalization of the prototype, and then some improvements and improvements will be made on the basis of the prototype, and then small batch production.

In short, it will be a long process from the beginning of design to small batch production, and it is very normal to spend eight or ten years.

However, Lin Feng felt that it would not take such a long time. If he had a system, the most time-consuming process of design and verification could be basically omitted.

From the beginning of design to small batch production, maybe two or three years will be enough.

While reading a book seriously, Lin Feng's train of thought was interrupted by a knock on the door, and he quickly got up and opened the door.

There was a pretty figure standing outside the door, it was Hu Xiaoxiao.

Lin Feng suddenly became happy, "Xiaoxiao, it's you!"

"Brother Lin!"

Hu Xiaoxiao was also happy, the person she missed was finally seen, the lovesickness of many days disappeared in an instant, and her heart became sweet and warm all of a sudden.

"Come in, it's cold outside."

The room was much warmer, and Hu Xiaoxiao's face and hands were a little red from the cold. Seeing Lin Feng's distress, he quickly brought the stove over, "Hurry up and warm up, it's freezing."

Hu Xiaoxiao sat obediently next to the stove, the charcoal inside was burning very vigorously, and after a few minutes of roasting, she felt warm all over her body.

"Brother Lin, my parents asked me to bring you some things."

She got up and opened the bag, and took out a lot of things from it, including dried sweet potatoes, jujubes, and even a piece of bacon.

Lin Feng looked at these things, and said warmly in his heart, "Uncle and aunt are too polite, they brought me so many things."

Hu Xiaoxiao giggled, "My parents treat you well."

"It's so kind to me, it's like treating me like a son, no, it's even better than being a son."

Hu Xiaoxiao blushed slightly, and said coquettishly, "Then you can't bully me in the future."

Lin Feng said, "I bullied you there."

Hu Xiaoxiao said, "I mean in the future, you can't bully me in the future."

Seeing that Lin Feng's room was a bit messy, Hu Xiaoxiao took the initiative to help tidy it up and swept the floor.

When leaving, Lin Feng helped her carry the bag and walked her to the door of her dormitory.

The next day.

The equipment branch factory officially started construction. The employees went to work on the first day after the Spring Festival. Every employee who went to work was surprised to find that Lin Feng, Wang Yalong and others were neatly dressed, standing at the gate of the equipment branch factory, smiling , welcome to work everyone.

This action made every employee feel warmer, thinking in their hearts, the boss is nice, he actually stood at the door to welcome us to work.

Lin Feng's operation gained a lot of followers, and his prestige among the employees further increased.

After welcoming the employees to work, Lin Feng also got busy and went to pay New Year's greetings to the leaders of the Phoenix Factory.

From Sun Jiangbo, the top leader, to Wang Tianfang, Lin Feng would come to pay New Year's greetings, say a few words of blessing, drink a cup of tea, and chat a few words. The time control is just right, usually sitting in each leader's office for eight to 10 minutes about.

After the start of the Spring Festival, everyone gradually entered the state. The second CNC broaching machine continued the general assembly, and the materials of the third CNC broaching machine were further complete. The general assembly may start in ten days and a half months.

The construction of the Hexi factory area is also very tight. This 1500-acre land has been transformed into a construction site, and a large number of construction workers can be seen.

Phoenix Factory, Wang Tianfang's office.

Zhong Jianmin, chief engineer of a certain type of engine model at Phoenix Aero-Engine Design Institute, was sitting there, drinking tea and chatting with Wang Tianfang.

The two first chatted for a while about the production and manufacturing of turboshaft [-] French parts. Since last year, French parts have entered the manufacturing stage. So far, many parts have been manufactured. Not long after, the first French parts The turboshaft eight engine will undergo final assembly.

After chatting about the turboshaft eight engine for a while, Zhong Jianmin sighed softly, "The R&D and manufacturing of our domestic turboshaft engine is obviously lagging behind."

Wang Tianfang was deeply touched, "Yes, even though the complete set of turboshaft eight engine technology was imported from France, its power is relatively small, and the output power of a single unit is only 400 kilowatts, which is too small."

What can a single 400-kilowatt output power do? It is only used in civilian helicopters or light armed helicopters.

To be precise, it is mainly used on Wuzhijiu. Each helicopter has two turboshaft eight engines, which can be regarded as filling the gap that we do not have domestic armed helicopters.

Zhong Jianmin said, "We are under a lot of pressure now, as you know, the higher authorities require us to absorb and digest the technology of the turboshaft [-], and design and develop a new type of turboshaft engine on this basis."

Wang Tianfang said, "Then how is your progress?"

The turboshaft eight technology has been introduced for several years. The first stage is the assembly of French-made parts at the Phoenix Plant, test run, and engine delivery.The second stage is the rough processing of the French material, and then the engine assembly, test run and delivery.

As the design unit, Zhong Jianmin and the others have also studied the turboshaft eight engine for many years, and have made some progress, and started the verification test of some parts.

As they have designed a centrifugal impeller, they are ready to carry out a series of verification tests, but before carrying out the verification tests, this centrifugal impeller must be manufactured.

"Tianfang, I came here this time mainly to ask for your help. The centrifugal impeller we designed needs to be verified. We plan to manufacture two pieces. Some processes in the early stage have been processed, and the next step is the milling of the blades."

The blade shape of the centrifugal impeller is complex, and the precision of the blade shape is very high. Such processing requires a five-axis linkage CNC machining center, and the Phoenix Factory has such equipment.

Wang Tianfang did not immediately agree, but said, "Where's the design drawing of the centrifugal impeller, have you brought it?"

Zhong Jianmin took out the design drawing from his bag and spread it out on the big table, "This is the centrifugal impeller we designed."

Wang Tianfang looked carefully, and he quickly discovered that this was seven or eight points similar to the centrifugal impeller of the turboshaft eight, except that the blade shape was slightly changed and the size was larger.

For example, the maximum diameter of the centrifugal impeller of the turbo shaft eight is 152 millimeters, and the maximum diameter of this centrifugal impeller is close to 200 millimeters.

Zhong Jianming explained, "This is designed for the future design of a turboshaft engine with a single power of 1000 kilowatts, and it is an important part of the core engine."

The so-called core engine refers to the core components in the design and development of new engines, such as compressors, combustion chambers, turbines and other core components.

A single output power of 1000 kilowatts is a huge improvement. Such a turboshaft engine can basically power a medium-sized armed helicopter.

After looking at the design drawings, Wang Tianfang said, "It shouldn't be a big problem. It is also very similar to the centrifugal impeller of the turboshaft eighth. Leave the milling of the blade shape to us."

Hearing this, Zhong Jianmin suddenly became happy, "If you can successfully mill the blade shape of the centrifugal impeller, then you will do us a big favor."

The next day, the design drawings of this centrifugal impeller reached Jiang Haitao, the technical director of the 406 workshop, and the two centrifugal impeller parts were also delivered to the five-axis CNC machining center.

On the CNC machine tool, Wang Qiang was processing the centrifugal impeller of the turboshaft eight engine. These two centrifugal impellers were a circle larger than the centrifugal impeller of the turboshaft eight. The contrast was sharp, and some workers asked curiously.

"Brother Wang, what kind of part is this? It looks like the centrifugal impeller of turboshaft eight, but it's obviously much bigger."

Wang Qiang replied, "They are not the centrifugal impellers of turbo shaft eight, but two parts sent by Phoenix for processing."

That's what happened.

At this time, Jiang Haitao had summoned several CNC programmers to carefully look at the design drawing.

After reading it, he asked, "It shouldn't be a big problem for you to compile the CNC machining program."

Several CNC programmers looked at each other, and even looked at Yang Wenjie in unison.

Yang Wenjie is now the leader of the CNC group. In the entire 406 workshop, the level of CNC programming is considered the highest, but he still has a drum in his heart.

If it was a CNC program of normal difficulty, of course he would have no problem. After all, he had been with Lin Feng for a while and had acquired a little bit of true knowledge, but he was not at all sure about such a difficult part.

This is a hell-level task. It can be seen from the design drawings that the airfoil data of this part is very complicated, and the accuracy of the airfoil is very high, which is no less difficult than the machining difficulty of the turboshaft eight centrifugal impeller.

He also couldn't write the NC program for the turbo shaft eight centrifugal impeller. The program saved on the machine tool was compiled by Lin Feng at the beginning, and they just called it out and used it.

After hesitating for a while, Yang Wenjie said, "Director Jiang, we don't have much confidence in such a complicated part."

Jiang Haitao's face changed slightly, and he said seriously, "This is the task assigned by Mr. Wang himself. If you are not sure, you have to try it, and you must complete the processing of these two parts to ensure the quality."

All of a sudden, Yang Wenjie was under a lot of pressure.

Helpless, he had no choice but to bite the bullet and said, "Then let's do our best."

Jiang Haitao said, "We must ensure the completion of the task. If you have any difficulties, you can directly contact me."

After Jiang Haitao left, Yang Wenjie led several CNC programmers to try to compile the CNC machining program for this part.

It took them three full days to prepare, and it was barely completed.

The NC program has been compiled temporarily, but I dare not try it. In case there is a problem, Yang Wenjie made a test piece for the sake of safety. It is exactly the same size as the official part, but the material is different.

The official parts are made of titanium alloy, and this test piece is made of aluminum alloy. Why choose aluminum alloy? In addition to the fact that the material is much cheaper than titanium alloy, there is another important reason, that is, the material is soft and easy to process.

Everything was finally ready, and the processing of the test piece began.

Yan Bing, the head of the 406 workshop, Jiang Haitao, the deputy technical director, and Yang Wenjie and other technicians were all present, standing next to the five-axis CNC machine tool.

Yang Wenjie knew that this was a big test for them.

So far, he has not been fully sure that there is no problem with the CNC machining program. He can only pray in his heart that there will be no problems.

Suddenly, Wei Wei became agitated.

Someone reminded, "Boss Wang and the others are here."

Not only Wang Tianfang came in person, but Zhong Jianmin also came in person.

These two parts are extremely important to them, and they must ensure 100% compliance. As long as one is scrapped, it will inevitably delay and affect the design verification work.

"Boss Wang, you're here in person."

The leader of the workshop, Yan Bing, greeted Wang Tianfang proactively.

Wang Tianfang waved his hands and said, "How is the preparation going?"

Yan Binghui reported, "It is ready, and the test pieces will be processed soon."

Wang Tianfang glanced at the test piece on the machine tool, and said approvingly, "You guys are quite thoughtful, it is necessary to process the test piece first."

Yang Wenjie blushed for a while, feeling very guilty.

He said in his heart, I have no choice. If I am [-]% sure, I will directly process the formal parts. There is no need to process the test pieces first.

"Mr. Wang, let's start processing now, how about it?"

Wang Tianfang said: "Start processing, let's take a look at the processing situation."

Yan Bing gestured to Wang Qiang who was operating the machine tool. Wang Qiang understood what Director Yan meant, checked the tool setting situation, entered the tool compensation value, and then started the machining CNC program, and the machine tool started to work.

The milling cutter began to mill the parts. It could be seen that the speed of the milling cutter was not fast. It seemed that the NC program compiled by Yang Wenjie and the others was very conservative.

If you are conservative, just be conservative. It is acceptable to only process the parts smoothly.

The processing was relatively smooth. Wang Tianfang and others watched it for three or four 10 minutes, saw that there was no problem, and left satisfied.

How do you know, they left for only one or two 10 minutes, the problem came.

　[-] more, ask for tickets again, monthly tickets, recommended tickets are all available! ! !

　　
　
(End of this chapter)