Liu Yijiu felt that these days were really upset.

I was hiding in the mountains and staring at a project, and solving any problems when encountering difficulties. This is a relatively simple thing and there is no need to think too much about it.

But unexpectedly, as soon as they came out, they first met an Iraqi bastard and asked him to explain the quality problems of their Dragon Guard tanks. The engines made by the same production process were not problematic. They played for so long and did not have any problems. As a result, problems arose during the war. They did not think about what weapons the other party might have used to affect the operation of these engines, but had to say what quality problems it was.

I came out to relax and looked at the imitation F14 that was about to fly for the first time, but the reality hit him with little confidence.

The assembly progresses very slowly due to process problems.

Even during the production process, process problems have been raised.

There is no large press. The most core key components of the fighter are not strong enough.

The production equipment is not good, and the workers' technical level is not enough, which causes such problems to occur again in parts that are not strong enough!

A series of problems such as production technology, manufacturing technology, strength, process equipment and technical level are like mountains that make him breathless.

If these problems cannot be solved, even if the F14 can be copied, the plane will not be able to fly in the blue sky due to heart problems.

After seeing the engine at Phoenix Mountain Airport, the group went to Factory 132 again because their engine production was in the 132 finishing workshop. All of this workshop were top technical workers. They have always produced the engines of J-7 and J-8.

It is one of the highest-level machinery manufacturing workshops in China. It is not much more convenient than the third district of the Ninth Hospital.

In this workshop, the CNC machine tools provided by the Ninth Hospital are even much stronger than other domestic peers. If there is no way to solve the production problem here, the Ninth Hospital is probably a bit unlucky.

"The accuracy of CNC machine tools is not enough. They must be processed and molded at one time on the machine tool. Do not use manual grinding. The roots are the key points of stress. In high temperature and high pressure, the structure is slightly different. This will cause the phenomenon we encounter. In the experiment on the ground platform, we did not encounter such problems. That is because the situation encountered by the engine during the ground test is different from that in the sky..." After visiting the entire production workshop and seeing the polishing process, Liu Yijiu immediately stopped the work on the work......

This kind of question was discussed until late at night.

Finally, after research and comparison, it was found that such a problem was caused. First, the equipment pressure for forging the overall turbine disc was insufficient, and a larger tonnage pressure equipment must be replaced. The 30,000 tons of the Southwest Aluminum Factory can be tried to produce. It is best to find a heavy machinery factory in Shanghai and use a 45,000 tons hydraulic press for forging; second, the technical equipment is insufficient. The four-axis machining center can process the overall turbine disc, which cannot be processed and formed at one time, and at least five axes are required!

During the secondary clamping process, the references for the two processing will be different. Although the deviation of this reference is less than 0.05 mm, it is also very fatal for impellers that work in such a harsh environment and work for a long time.

"Director Liu, we can't solve the equipment problem..." There is no problem in replacing the pressure equipment for the problem raised by Liu Yijiu.

After all, the Shanghai Stock Exchange Heavy Industry is also a military-industrial system. Although they are shipbuilding and their production business is very busy. If they ask them to help adjust and produce a few products, there is no big problem.

However, CNC machine tools are the shortcomings of the entire Republic...

Either use more materials and more time to cultivate the technical level of top technical workers, making them the most top technical experts; or, it is to obtain a five-axis machining center with more advanced, stronger processing capabilities and higher accuracy!......

First, no one will choose.

"If we train our ninth-level fitters to do such things, let's not talk about efficiency. The youngest ninth-level fitters in China are in their forties. They have spent several years, a lot of energy and costs to cultivate them, and they are facing retirement..." Wang Shunyi, who was traveling from Dabashan to Rongcheng Factory 132, attended the technical discussion meeting in a Blue Army helicopter, directly rejected the proposal.

Because the Ninth Hospital itself is the unit with the most top technical workers in China, the leaders of the Ninth Hospital have the most say in terms of high-precision quality assurance of CNC production and manual production.

"Old Xie, isn't the five axis on your side solved?" Liu Yijiu asked Xie Heping, who was also here.

These problems... were not discovered by Liu Yijiu, but were the results analyzed by Xie Heping, Yu Jianguo and others after discussion.

Wu Delin, the top nine-level fitter representative, was also recruited here.

Seeing Liu Yijiu throwing pressure on him, Xie Heping smiled bitterly, "Director Liu, although our five-axis machining center is currently implemented, its accuracy is much worse. We can only ensure positional accuracy within 0.05 mm, and at the same time, the indexing accuracy can only be guaranteed to be within 0.8″. According to the requirements of the engine, the required machining centers for finishing need at least the positioning accuracy and machining accuracy within 0.005 mm. At the same time, the indexing accuracy is within 0.01″..."...

The five-axis machining center was built for several years, but it was not possible to use it for the most precise manufacturing.

Most of the time, it still has to be guaranteed by the work fixtures and the experience level of workers.

"Director Liu, the five-axis has always been a major technical equipment that we are stepping up for the development. For this, the National Defense Science and Technology Commission has allocated 10 million yuan to us..." Yu Jianguo, who is responsible for the research and development of the five-axis machining center, also said to Liu Yijiu.

This is not because they don’t work hard, but because they have to meet the requirements. At present, it seems impossible in a short period of time!

"Then tell me, what should we do now? If our engine cannot be solved, then our test flight work will have to stop. Even the imitation of the first flight will be very successful, it will be difficult to continue..." Liu Yijiu patted his head heavily and asked the technicians and managers present.

Everyone was silent.

Liu Yijiu knew the domestic technical level very well, but he kept working on projects that caused headaches for the whole country.

Everyone was actually mentally prepared for this.

But I didn't expect that under the current circumstances, such serious consequences would be caused.

"Xiao Liu, I think otherwise, aren't our imitation pandas many improvements? Use the F14 engine to conduct a test flight first. Even if the first flight is completed, it will not be possible to complete it in a short time. We can conduct a test flight while stepping up the problem of the engine. If it really doesn't work, reduce the maneuverability and put on the turbofan six..." Wang Shunyi also had a headache about this.

He knew clearly that Turbofan Six was simply not enough to allow Pandas to perform their true performance.

Even doing cobra maneuvering is not possible.

Moreover, the combat radius will be seriously affected.

"It's absolutely not possible to use turbofan Six!" Liu Yijiu shook his head firmly.

The thrust ratio of turbofan six is ​​only 6. Even if the maximum afterburner thrust is only 12,220 kN. For F14, which has a take-off weight of 26,632 kg, a normal take-off weight of 24,948 kg, and a maximum take-off weight of 33,724 kg, is not enough.

Because of the use of two turbofan six engines, the maximum take-off weight can only reach the normal take-off weight of the F14, and it is even much worse.

This will cause a very serious weakening of the various performance indicators of the entire fighter.

The thrust-to-weight ratio of turbofan 8 reaches 8, which can barely match F14 for use...

If it was changed, it would be a big deal!

"Director Liu, what if you think this is the case, you mobilize a group of top technical workers to solve the current problems first. Other tasks are still underway..." Wu Delin, who has rarely received a chance to speak, put forward such opinions.

The more difficult the job is, the more attractive it is to these top technical workers.

Only by challenging technology, especially difficult technical problems, can they reflect their sense of existence.

"Can it be solved?" Liu Yijiu asked in surprise.

In terms of processing, he can play with various equipment, and his technical level is higher than that of ordinary workers. But after all, he is not as experienced as these top bulls who have worked for decades.

"It should be possible, but it takes time..." Wu Delin was also unsure.

Even if he has confidence, he is not sure.

Without solving this problem, the heavy fighter jets of the Republic will not be able to fly into the blue sky. The pressure in the Ninth Courtyard is already great. At that time, Director Liu, who is under all the pressure, will fall down and the entire Ninth Courtyard will be finished.

Everyone in the Ninth Court knew the pressure on Liu Yijiu. But they had no choice but to help solve the problem within their ability......

"That's good. You are responsible for this matter. You don't have to go back to the base now. Who do you want? You told Director Xie and Director Zhao to solve this problem specifically. As long as you solve this problem, no matter you or the people from Factory 132, you must reward you must not be missing! There are many houses and money!" Liu Yijiu said excitedly.

These professionals really need to find ways to solve the technical problems.
Chapter completed!