Tang Jianyì's thoughts seem to go back to the 80s, when he was sweating like rain and working day and night when he tried to produce the turbofan B engine.

At the beginning, the compressor wheel disc of turbofan B was very difficult to process, which was a big problem for the engineering and technical personnel at the beginning, the processing method was wrong, the process parameters were inappropriate, and everyone was anxious, especially the processing deformation problem, which took several years to make the situation a little better.

At the beginning, when the turbofan B technology was introduced, the tolerance of the wall thickness of the spoke plate on the Russian drawings was ±0.05, but the E factory could not meet this requirement at all, and it was barely possible to reach ±0.1, but it was not possible to meet the requirements of the Russian drawings ± 0.05 thousand.

So, the factory, the design institute, repeated meetings and discussions, in the end, some people say that our overall industrial level is not as good as Lao Maozi, can not meet this requirement is excusable, we must combine the reality, from our national conditions, some requirements can not be reached, we must consider relaxing.

As soon as this argument appeared, it was supported by a large number of people, and Tang Jian was also one of the supporters at the beginning, so after repeated discussions, Factory E reached an agreement with the Sixth Design Institute to relax some of the tolerances of turbofan B that were relatively strict and unattainable in the process and were not very important.

If Li Tianfeng is dozens of years younger, he will definitely jump up and scold, this is not important, the compressor wheel disc is a rotating part, and it is a force part, this tolerance is doubled at once, and it has an impact on the performance of the engine.

This really affected the performance of the engine, because the tolerances were not only relaxed by this one size, but by many dimensions, until now. The performance of our turbofan B engine is not as good as Lao Maozi's engine of the same model.

However, there were many stories about the design relaxation at the beginning, and Factory E also put in a lot of effort to do a lot of work in charge of the design work of the sixth design institute. That's where we are now.

Factory E can't meet the requirements! Like Li Tianfeng, a freak, it is easy to process the parts completely qualified, and some key and important dimensions are also processed very well, that is, the error of the wall thickness size of the spoke plate can also be processed to within 0.02.

No wonder, no wonder Tang Jian yì turtle for a long time, came to the sentence "You really don't have back pain when you stand and talk".

I know why. Li Tianfeng also sighed a little, even now, there is still a certain gap between the overall technological level of China and Lao Maozi.

Compared with the world's first-class aviation industry countries, Lao Maozi can only be regarded as second-rate. Or at most it can only be regarded as the bottom of the first-class, at present, the best level of the aviation industry should be counted in the United States, Britain, France and other countries. Like General Electric, Lockheed Martin, Rolls-Royce, these names one by one. It's just thunderous and famous!

There is still a long way to go!

Thinking of this, Li Tianfeng sighed with emotion. I feel that the burden on my body is really not light!

The measurement of the parts was completed, and the actual measured values of each size were also recorded on the record sheet, Tang Jian knew that he was going back to the E factory, and the quality of the parts processing was so good, Tang Jian seemed to be in a good mood, and there was nothing to worry about.

"Mr. Li. Today was a worthwhile trip, and you didn't let me down. I'll come back and learn about it again in the future. ”

"Soup expert. You're welcome. Li Tianfeng said, then looked at the time, and politely said: "Expert Tang, it's almost time to get off work, it's better to eat and leave." ”

"No, no, I have to go back and report the situation to Mr. Yang?" Tang Jian shook his head hurriedly.

Li Tianfeng was also polite, personally sent Tang Jianyì to the door, and watched Tang Jianyì get into the car before returning to his office.

……

E factory, Yang Xianfeng office.

This afternoon, Yang Xianfeng was receiving his colleagues from Factory B, Long Yingshi, the chief engineer of Factory B. Yang Xianfeng and Long Yingshi are alumni, both graduated from Beihang University, and both are chief engineers, and the two have a good personal relationship.

The scale of Plant B is still above that of Plant E, mainly manufacturing large engines, such as turbojet, turbofan is the main model of Factory B, mainly equipped with domestic active fighters and bombers.

"Xianfeng, your turboshaft C engine was in the limelight last time in the National Day parade, and our factory B was almost overshadowed."

"Where, where." Yang Xianfeng was modest for a while, and at the same time, there was a trace of helplessness in his expression, Vortex C seemed to be bright, but what kind of situation it was, Yang Xianfeng knew it clearly.

"What? Is there something tricky? Long Yingshi couldn't help but ask.

Yang Xianfeng said: "Old classmate, I am anxious now, there are many problems with vortex C, and it is estimated that it will take several years to really produce small batches." ”

Aero engines generally go through design, design verification, process verification, new machine trial production, assessment and commissioning, design finalization, small batch production, mass production and other links, and the current turboshaft C engine can only be regarded as a new machine trial production at most.

Long Yingshi said: "Old classmate, the trial production of new machines is generally like this, don't rush, take your time." After thinking about it, Long Yingshi said: "Just like your turbofan B trial production, at the beginning, there were not many problems, and after so many years, it is not now mass production." ”

Obviously, Long Yingshi knows more clearly about the situation of the turbofan B of the E factory, and Yang Xianfeng said: "The turbofan B has been bumpy all the way from the trial production to the present, and now the problem is basically solved, but there are still some parts of the processing that have not been completely solved, but compared with the previous one, there have been great improvements, such as compressor wheels, mid-flow casings, turbine blades and so on. ”

"Xianfeng, the processing of your compressor wheel is really much better than before, and I can't bear to witness the bad processing quality before."

Hearing this, Yang Xianfeng's old face flushed, "Yes, the current quality situation has been greatly improved, however, there is still room for improvement, no, we happen to have a good partner, we sent a batch of turbofan B compressor wheel blanks to this company, the processing of the first batch of parts, should have entered the finishing process." ”

Long Yingshi was stunned for a while, and after reacting, he couldn't help but say: "Old classmate, do you mean to give the turbofan B compressor roulette to an outside machining company for finishing?" They have such strength, you are so relieved? ”

Yang Xianfeng was about to open his mouth to explain, there was a knock on the door, it was Tang Jian, in the morning, Tang Jianyi went to Tianfeng Technology, and as soon as he went to work in the afternoon, he immediately came over to report to Yang Xianfeng.

Entering Yang Xianfeng's office, Tang Jian was stunned, he didn't think that there were still guests, and looking at this momentum, he should also be a big leader, Tang Jian hesitated, and didn't know how to say hello, because he didn't know people.

Yang Xianfeng waved his hand, "Expert Tang, I went to Tianfeng Technology in the morning, how is the processing of our ninth-level roulette?" ”

Tang Jianyì came to report this matter, and the preparation was relatively sufficient, and then his face was happy, opened the design drawings of the ninth-level roulette he brought, took out a copy of the measured value record table, and said happily: "Mr. Yang, Tianfeng Technology is really amazing, the processing quality of the ninth-level roulette is excellent, and this is the measured value record table of each size of the first part." ”

Tianfeng Technology!

Excellent processing quality!

Suddenly, Long Yingshi was not calm, stood up, leaned over, looked at the design drawings of the ninth-level roulette, and then stopped at the measured value record sheet in Yang Xianfeng's hand.

This, this can't be!

Qualified, qualified, qualified...... All qualified!!

Long Yingshi is the chief engineer, of course, he understands technology, and his technical attainments are not shallow, when he looks at this measured value record table, it is no wonder that his expression is not calm, full of consternation.

For the ninth-level compressor roulette, of course Long Yingshi has some understanding, before, I have listened to his old classmate's nagging, some very difficult to process sizes, Yang Xianfeng has repeatedly mentioned it, Long Yingshi is impressed.

However, this look at this measured value record table, completely subverted the impression of Long Yingshi, these sizes are all qualified, even those who used to often exceed the tolerance, more difficult to process the size, are all qualified, and even a little bit of difference.

What kind of enterprise is Tianfeng Technology!

Suddenly, Long Yingshi became curious, "Xianfeng, if the measured values of these sizes are true and accurate, this Tianfeng Technology is not simple!" ”

Tang Jianyi next to him immediately quit, no matter what kind of big leader you are, he immediately raised his voice a few degrees, "The measured values of these sizes are all true and reliable, and this is checked personally." ”

Yang Xianfeng couldn't help but smile, knowing that it was boring to deal with Tang Jian, and the quality of parts processing was so good, Yang Xianfeng was exactly this in his heart, and introduced with a smile: "Old classmate, Tianfeng Technology is not simple, although this company has not been established for a long time, it is ......"

Yang Xianfeng briefly introduced Tianfeng Technology, after listening to the introduction, Long Yingshi was surprised for a while, covering an area of 1,200 acres, high-standard workshops, a large number of high-precision imported equipment, strong technical strength, this, this, this ......

After a burst of surprise, Long Ying firmly wrote down the words "Tianfeng Technology", and at the same time, his heart was also active, he had a titanium alloy integral fan plate with a diameter of nearly one meter in his hand, whether to let Tianfeng Technology Company try to process it.

……

Tianfeng Technology.

Li Tianfeng was answering a phone call, and he was in a good mood. Li Tianfeng was far from thinking that in Factory E, his Tianfeng Technology was firmly remembered by Long Yingshi, remembered on the psychological side, and was still firmly remembered by Long Yingshi with a very good impression.

………

Friday, Saturday, two days 12 more, there is no manuscript left, today Sunday, see everyone's monthly pass, recommended tickets, and collections have also been rising, shell today is ready to continue to work hard codeword, strive for three more, this is the first change.

…… (To be continued)

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