Start with the aviation industry

Chapter 346 Lively Workshop 406
Jiang Haitao was taken aback for a moment, and then his face was full of surprise, he didn't expect to see Lin Feng in workshop 406!
"Boss Lin, it's really you!"

Lin Feng also recognized it at a glance, and said happily, "Director Jiang, we haven't seen each other for a long time." Then he proactively extended his right hand.

Jiang Haitao took two steps forward, holding Lin Feng's hand tightly, "I haven't seen you for at least three years, and Mr. Lin is still so young."

The two chatted for a while, and Jiang Haitao greeted Wang Tianfang again. Now Wang Tianfang is the head of the Phoenix Factory, his immediate boss.

Wang Tianfang nodded, "Boss Lin, Haitao is now the director of workshop 406."

Such a change is normal. After all, it has been several years. Jiang Haitao was originally the deputy technical director of the 406 workshop, and it was a matter of course for him to be promoted to the director of the workshop.

Wang Tianfang continued, "Haitao, we are here to have a look at the processing of the third-stage compressor wheel, please take us there."

When mentioning the third level of roulette, Jiang Haitao was under a lot of pressure. His face was full of excitement and joy, but now it receded a lot, and gradually appeared a little heavy.

"Mr. Wang, comrades are not sure at all, and are worried and afraid. The third-level roulette was supposed to start the precision counting process early this morning, but it hasn't started yet."

After finishing speaking, he sighed lightly.

Wang Tianfang comforted, "Don't worry, I asked Mr. Lin to help us solve the problem. He has a way of processing the compressor wheel."

Really!
Jiang Haitao's eyes lit up slightly!
Reminiscent of when Lin Feng was working as a process technician in the 406 workshop, he was very capable and solved many big problems, and immediately, he was full of confidence in Lin Feng, "Great, this difficult problem will definitely be solved when Mr. Lin comes here. "

"Mr. Lin, you may not know that the processing pass rate of these compressor wheels has always been very low, there are always various deformations, and a large number of scraps. I feel distressed when I see these scrapped parts."

This is a titanium alloy part. Leaving aside the series of processing costs caused by processing so many processes to the precise number of cars, the material cost alone is not cheap, because titanium alloy is more expensive, and it is more expensive than aviation stainless steel and aviation aluminum-magnesium alloy. Much more expensive.

The three of them walked towards the workshop while talking.

Immediately, it attracted the attention of many people!

It doesn't matter if you don't attract attention, Wang Tianfang is the leader of Phoenix Factory, besides, Jiang Haitao is the workshop director, and then there is Lin Feng!

"That seems to be Mr. Lin!"

"Be confident and remove the word 'as if'!"

"Boss Lin actually came to our workshop, it's like a dream!"

"Look, they walked towards that imported CNC lathe!"

"."

The production site of the workshop was almost commotion. Lin Feng's appearance was like throwing a big stone on the calm water. Many people stopped and looked around, and some people greeted Lin Feng enthusiastically.

"Mr. Lin, hello!"

"Boss Lin, I'm so happy to finally see you again!"

"Boss Lin, welcome home!"

"."

Faced with everyone's enthusiasm, Lin Feng smiled, nodded occasionally, or waved his hand, "Hello everyone, I am also very happy to meet you!"

After a while, under the leadership of Jiang Haitao, he arrived next to the imported CNC lathe. Beside this lathe, there were more than a dozen third-stage compressor wheels waiting for precision counting, as well as technicians and workers.

They are doing some preparations before processing, but the processing of the first piece has not yet started.

Lin Feng came, so did Wang Tianfang and Jiang Haitao. These workers and technicians were both happy and a little nervous.

Other people also gradually gathered around, with this CNC lathe as the center, at least one to 20 people surrounded it, it was very lively.

Seeing the appearance of Lin Feng, the entire 406 workshop was completely boiled. Some workers who had nothing to do for the time being, even technicians and management personnel appeared beside this CNC lathe.

Jiang Haitao introduced, "Boss Lin, we are preparing for the precision counting process of the third-stage compressor wheel, with a total of eleven parts."

While listening to Jiang Haitao's introduction, Lin Feng took a look at the machining process card of this precision digital car, and also looked at the NC program, and even looked at the tools used for machining several times, thinking about the problem all the time Where is it.

For these years, Lin Feng has been insisting on looking at all kinds of professional data, not only in mechanical processing, but also in other aspects of the aviation industry. With the bonus of god-level learning talent, even without relying on the system, the technical level is very high.

All kinds of professional knowledge are also very rich. It is estimated that it is difficult for someone to have such a rich and extensive knowledge.

The other people next to him gradually understood what was going on.

"Boss Lin originally helped me solve the problem of processing the roulette of the compressor!"

"It seems that there is hope. Mr. Lin was very good when he was a technician in the workshop!"

"It would be great if this problem can be solved, the processing qualification rate of the compressor wheel is too low!"

"It is too wasteful and a pity to waste a lot of time in the process of precision counting vehicles!"

"."

The people around were discussing enthusiastically, and everyone had infinite hope in their hearts, as if as long as Mr. Lin made a move, there would be no problem that could not be solved.

Gradually, there were more and more people around the machine tool. Not only some process technicians from Workshop 406 came over after hearing the news, but also people from other departments of Phoenix Factory, such as the chief and deputy directors of the Engineering Technology Department, process supervisors, etc. came over one after another.

Lin Feng not only looked at the processing card of this process, but also looked at the CNC program and the CNC machining tools used, and gradually got the answer in his mind. To be on the safe side, he asked some questions about the workers in the CNC process and the technician in charge .

"Mr. Wang, I already know where the problem is."

what!
Find the problem so quickly!
Wang Tianfang said happily, "Boss Lin, tell us quickly what the problem is and why there are always deformations in this process."

Lin Feng said, "The root cause of processing deformation is the surface stress generated by processing, and the parts are slightly deformed under the action of stress. Although this deformation is very small, our parts require high precision. Look at these dimensions, and the tolerances are very high. Only a few wires, especially the size of the seam, is not only the key size, but also the tolerance is only plus or minus one and a half, a little deformation can make these dimensions out of tolerance.”

"Mr. Lin, how did this surface stress come about?"

Lin Fengdao, "This surface stress is generated during the processing. The processing performance of titanium alloy is different from other alloys. It requires very sharp cutting tools. Once the cutting tool is worn, it is easy to form a hardened layer on the processing surface of titanium alloy. As a result, surface stress is generated, and after this surface stress is generated, it will be released slowly, causing deformation of the part."

That's it!

Although many people were confused by what they heard, people with technical backgrounds such as Wang Tianfang and Jiang Haitao understood what was going on.

There is no need for them to ask, Lin Feng said, "It is actually very simple to prevent surface stress during the machining process. One is the selection of CNC machining parameters, and the other is the selection of machining tools."

"Take the third-stage compressor roulette in front of me as an example. I think the NC programming is unreasonable, and there are also problems with the selection of tools, which must be improved."

How to improve and perfect it!

Lin Feng waved his hand and said, "Knives must choose alloy blades, 35-degree ones are fine, go and bring all the 35-degree alloy blades over and let me have a look. In addition, the NC program needs to be reprogrammed. I will teach you how to program this program. "

Soon, several kinds of 406-degree alloy blades from the 35 workshop were taken. After looking at it, Lin Feng chose the most suitable one. This kind of blade was enough.

Originally, two kinds of alloy blades were used in this process, one is 60-degree alloy blade, and the other is 80-degree alloy blade. This process has a machining allowance of about 1 meter. The original processing method is to use 80-degree alloy blade first. Remove the margin of the blade, leave a margin of about 0.2, and then use a 60-degree alloy CNC blade for fine turning.

This is troublesome and prone to surface hardening and surface stress.

Lin Feng only chooses 35-degree alloy blades, and the processing is in place at one time, because the blades are sharper and sharper. If you choose a turning path with reasonable processing parameters, there will be no surface hardening at all, and no surface stress will occur.

After selecting the alloy blades required for processing, Lin Feng simply programmed directly on this CNC machine tool.

This scene shocked many people.

"My God, Mr. Lin programs directly on the machine tool, and he can actually program in CNC!"

"Nonsense, Mr. Lin was the leader of the CNC programming team when he was in the 406 workshop!"

"The speed is so fast, so skilled!"

"."

Lin Feng's speed is really fast. The NC machining program was compiled in just seven or eight minutes, and it is more than half shorter than the original NC program. It is more concise and can be processed in one go.

After the program was compiled, Lin Feng simply instructed the operator to make preparations before processing, replacing the CNC tool with a CNC turning tool equipped with a 35-degree alloy blade, aligning the part, setting the tool and aligning the zero point of the coordinates, etc.

After a while, everything was done, Lin Feng said, "Let's start processing the first piece, there shouldn't be any problems."

The operator of this imported CNC lathe was a little nervous, but also a little afraid, and hesitated for a long time.

Lin Feng shook his head and smiled, and he simply operated it himself, closed the safety door of the machine tool, and pressed the start button himself.

The CNC machine starts to work!
Under the control of the CNC program of the machine tool holder, it moves quickly with a sound of "咻", reaches the automatic position, and starts turning the parts.

This this.
The surrounding area was quiet, and some people were stunned again. Isn’t Mr. Lin the big boss of Leihuo Technology Industry Group?

"Oh my god, it's amazing!"

"If I didn't see it with my own eyes, I wouldn't believe it if I was killed. Mr. Lin can even play with imported CNC lathes!"

"Mr. Lin has always been a legend in the 406 workshop. It is rumored that the technical level is very high, and that he can operate various CNC equipment. I have always been a bit unbelievable, but now I firmly believe it!"

"."

Hearing such words came into his ears, Lin Feng smiled slightly, it's just a CNC lathe, it's not a complicated thing, what is this!
Even more complex CNC five-axis linkage machining centers can be operated by Lin Feng, and the operation level is not low.

In the astonishment of everyone, this CNC lathe started to work, turning and processing the third-stage compressor wheel on the machine tool according to the requirements of the CNC program.

Soon, everyone realized that something was wrong!
This processing speed is too fast!

It can be clearly seen that the rotation speed of the machine tool is very fast. During normal processing, the rotation speed is generally in the early 100s, but now it is more than 300, at least three times the usual speed.

"Such a fast speed, will there be any problems!"

"Don't worry, Mr. Lin compiled the CNC program himself just now, there must be no problem!"

"."

Some people are a bit worried, but more people have confidence in Lin Feng, especially those old employees, they know that Lin Feng's level is very high.

Wang Tianfang was not worried about this aspect either, and said with emotion, "Mr. Lin, it seems that our choice of processing parameters is a bit conservative. CNC turning generally has a speed of several tens of revolutions, and the cases of more than [-] are relatively rare."

Lin Feng said, "For such a good imported CNC lathe, it is a serious waste to choose too conservative processing parameters."

In Leihuo Technology Industrial Group, the parameters of CNC machining are very high. For example, the processing speed of CNC turning is generally two or three hundred, while the speed of CNC milling is higher, generally more than one thousand, and in some cases, two or three thousand are used. speed.

The purpose of doing this is not only to give full play to the advantages of CNC machine tools, but also has the advantage that the processing efficiency is very high. Others may take an hour to complete the process, which may only take half an hour, or even one or two 10 minutes. finished.

The processing speed of this part in front of me is very fast. From the start of the machine tool to the completion of processing, the CNC machine tool stopped in less than 10 minutes.

Why did the lathe stop by itself!
Could something be wrong!

Some people who were worried at first blurted out at this time, "Let me just say, such high processing parameters will cause problems sooner or later."

Seeing someone next to him looking at him like a fool, he quickly swallowed back the words behind him, only daring to continue in his heart, now finally something went wrong, I don’t know if this part on the machine tool is broken or not.

Hearing such words, Lin Feng was not angry, but reminded, "This part has been processed, and there is nothing wrong with it."

what!
This completes the processing, and it takes less than 10 minutes.

All of a sudden, many people were astonished, especially those who knew how long this part originally took. They knew that this part took about an hour and a half in this precision counting car.

Now, it's less than 10 minutes!

"Boss Lin, is it really finished!"

Someone couldn't help asking loudly. Although some other people didn't ask, their expressions were similar, and they didn't really believe that the processing was completed so quickly.

Lin Feng said loudly, "Of course the processing is finished, I still know how long this part will take to process."

While speaking, he opened the safety door of the machine tool, and took a high-pressure air gun to blow the milky white coolant on the surface of the part. Then, the finished part was completely displayed in front of everyone.

"It seems that the processing is really finished!"

"My God, Mr. Lin didn't lie to us!"

"How long has it been? It's really unbelievable!"

"."

Seeing that the parts on the machine tool had indeed been processed, another exclamation sounded, presumably seeing the movement here, some other people put down their work and trotted over.

The first sentence I ran over was to ask, what happened, what happened.

When I realized that the parts that originally took about an hour and a half to process were completed in less than 10 minutes, I was amazed.

Mr. Lin can't be magic!

Seeing everyone's doubts, Lin Feng explained, "The original NC program parameter selection is very conservative, the processing efficiency is low, and it is divided into semi-finishing turning and precision turning, which means that the turning parts need to be turned twice. The processing parameters I chose It has improved a lot, and the one-time turning is in place, of course it only takes such a short time."

That's it!

After listening to the explanation, everyone understood, and said in their hearts, it can still be like this, and the processing efficiency can be improved several times!

Lin Feng waved his hand and said, "The parts have been processed, first check the processing dimensions on the machine tool and make a record."

The operator next to him realized that just now, he was also in shock. It was not the first time for him to process the third-stage compressor wheel, but he finished the first piece in less than 10 minutes. He didn't even think about it. Dare to think.

Jiang Haitao also said loudly, "What are you still doing in a daze, do it immediately according to President Lin's request."

The operator is holding a measuring tool or is preparing to measure, first is a general measuring tool, such as a micrometer, and then a professional measuring tool.

There are some dimensions that cannot be measured by general-purpose measuring tools, and some special-purpose tube measuring tools must be used.

Before the measurement, first carry out the watch, after the size of the watch parts is adjusted, and then take the special measuring tool to measure the size of the parts.

Every time a dimension is measured, a dimension is recorded, and a technician next to it cooperates with the record. After a few minutes, several main dimensions are measured.

It is not necessary to measure every dimension, because there are dozens of dimensions in this process, and it is too time-consuming to measure each one. It is enough to selectively measure some main and relatively critical dimensions.

Lin Feng said, "Okay, let's measure these main dimensions, now take the parts out of the machine tool and measure them again."

These dimensions measured on the machine tool just now are all qualified, and they are very perfect, almost all of them are in the middle. If they are measured under the machine tool, if they are also qualified, it means that there should be no major problems with this part.

In the past, such a situation often occurred during processing. The measurement on the machine tool was qualified, and the size changed when it was taken down for measurement, and the original qualified size became out of tolerance.

There are still a few parts that are qualified for measurement after taking off the machine tool, but after a few hours of measurement, they have changed again.

Will it happen again this time?
I can only update [-] words today, and the boss who has a monthly ticket still hopes that you can help me with a ticket.

(End of this chapter)