Super military empire

Liu Yijiu felt that the past few days have been a bit disturbing.

Originally hiding in the mountains, staring at a project, and solving any problems when encountered, this is a relatively simple matter, and there is no need to think too much.

But I didn’t expect that when I came out, I would first encounter an Iraqi bastard, asking him to explain the quality of their Dragon Guard tanks. The Iranians didn’t have any problems with the engines made by the same production process. They played so long There was no problem with time. As a result, problems appeared during the war. They did not think about what weapons the other party might use that affected the operation of these engines, but had to say what quality problems were.

Coming out to relax and take a look at the imitation f14 that is about to fly for the first time, but the reality does not have the confidence to hit him a bit.

The assembly progress is very slow due to process problems.

Even in the production process, process problems have been exposed.

There is no large press, and the key components of the fighter are not strong enough.

The production equipment is inadequate, and the workers' technical level is not up to the level. This problem has arisen in parts that are not strong enough!

A series of problems such as production process, manufacturing process, strength, technological level of process equipment, etc., were like a mountain that overwhelmed him.

If these problems cannot be solved, even if the f14 can be imitated, it will not be able to make the plane soar in the blue sky due to heart problems.

After seeing the engine at Phoenix Mountain Airport, the group went to the 132 factory again because their engine production is in the 132 finishing workshop.All the top skilled workers in this workshop have been producing J-7 and J-8 engines.

It belongs to one of the highest-level machinery manufacturing workshops in the country, and it is less panic than the three districts of the Ninth Academy.

In this workshop, due to the CNC machine tools provided by the Ninth Institute, the strength is even stronger than that of other domestic counterparts. If there is no way to solve the production problem, the Ninth Institute is probably a bit overhang.

"The precision of the CNC machine tool is not enough. It must be processed on the machine at one time. Do not use manual polishing. The root is the key point of the force. Under high temperature and high pressure, the structure is slightly different, which will cause the phenomenon we encounter. The experiment on the ground platform did not encounter such a problem. It was because the situation encountered by the engine during the ground test was different from that in the sky..." After visiting the entire production workshop and seeing the polishing process, Liu Yijiu immediately stopped the work in progress.

Discussions on such issues continued until late at night.

Finally, after research and comparison, it is found that the first problem is that the pressure of the equipment for forging and pressing the overall turbine disc is not enough, and it is necessary to replace the pressure equipment with a larger tonnage. The 30,000 tons of Southwest Aluminum Plant can be trial-produced, and it is best to find the Shanghai Stock Exchange. The heavy machinery plant in China uses a 45,000-ton hydraulic press for forging; secondly, the technical equipment is insufficient.The four-axis machining center processes integral turbine disks, which cannot be processed at one time, and at least five axes are required!

During the secondary clamping process, the benchmarks of the two machinings will be different. Although the deviation of this benchmark is only less than 0.05 mm, for the impeller working in such a harsh environment and still working for a long time, It is also very fatal.

"Director Liu, we have no way to solve the equipment problem..." For the problem raised by Liu Yijiu, there is no problem with replacing the pressure equipment.

After all, Shanghai Heavy Industries is also a military industry system. Although they are shipbuilding, their production business is very busy. Ask them to help adjust and produce a few products. The problem is not big.

However, CNC machine tools are a shortcoming of the entire Republic.

Either use more materials and more time to cultivate the skills and experience of the top skilled workers, so that they can become the top technical masters; or, to obtain more advanced, processing capabilities, and higher precision five Shaft machining center!

First, no one will choose.

"If we train our ninth-level fitter to do such things, let’s not talk about the issue of efficiency. The youngest ninth-level fitter in the country is in their forties. It took several years, a lot of energy and cost to train. , They are facing retirement again..." Wang Shunyi, who rushed to the Rongcheng 132 factory by a blue army helicopter to participate in the technical discussion meeting, directly rejected this proposal.

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

"Old Xie, haven't the five axes on your side been resolved?" Liu Yijiu asked Xie Heping, who was also here.

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

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

Seeing Liu Yijiu putting the pressure on him, Xie Heping smiled bitterly, "Director Liu, although the functions of our five-axis machining center are realized, the accuracy is quite poor. We can only guarantee within 0.05 mm. At the same time, the indexing accuracy can only be guaranteed within 0.8".According to the requirements of the engine, the machining center required for finishing needs 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 has been in operation for so many years before it was barely developed, but it is simply not possible for the most precise manufacturing.

Most of the time, it still depends on the tooling and fixtures and the experience level of the workers.

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

It's not that they don't work hard, but to meet the requirements. At present, it seems impossible in a short time!

"Then tell me, what should we do now? If our engine can't be solved, then our test flight will have to stop. Even if the first flight of the imitation is a complete success, it will be difficult to proceed... "Liu Yijiu patted his head heavily, and asked the technicians and management personnel present in front of him.

Everyone was silent.

Liu Yijiu knows the level of domestic technology very well, but he constantly engages in projects that cause headaches for the entire country.

In fact, everyone was mentally prepared for this.

But I did not expect that the current situation would cause such serious consequences.

"Xiao Liu, I think otherwise, our imitation pandas have many improvements? Use the f14 engine to test flight first. Even if the first flight is completed, it will not be possible to complete it in a short time if it is to be completely successful. We You can step up to tackle the problem of the engine while conducting a test flight. If it doesn't work, you can reduce the maneuverability and use the turbofan six..." Wang Shunyi is also a headache.

He clearly knew that the turbofan six was simply not enough for the panda to perform its real performance.

Even making moves like cobra maneuvers is impossible.

Moreover, it will seriously affect the combat radius.

"Using turbofan six, absolutely not!" Liu Yijiu shook his head firmly.

The thrust ratio of the turbofan six is ​​only 6, even if the maximum afterburner thrust is only 12220 kN, for the f14 with a take-off weight of 26,632 kg without an external suspension, a normal take-off weight of 24,948 kg, and a maximum take-off weight of 33724 kg, Not enough at all.

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, or even much worse.

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

The turbofan eight has a thrust-to-weight ratio of 8, which is barely able to meet f14 for use.

Changed, and imitated a fart!

"Director Liu, do you think this is the case? We should mobilize a group of top skilled workers to solve the current problems first. Other tasks are still under way..." Wu Delin, who has rarely been given the opportunity to speak, put forward this opinion.

The more difficult the job, the more attractive they are to top skilled workers.

Challenges to technology, especially difficult technical problems, can reflect their sense of existence.

"Can it be solved?" Liu Yijiu asked with some surprise.

In terms of processing, he can play around with all kinds of equipment, and his skill level is higher than that of ordinary workers, but after all, he is not as experienced as the top big cows who have worked for decades.

"It should be possible, but it takes time..." Wu Delin was also not sure.

Even if he is confident, he is not sure.

If this problem is not solved, the heavy fighters of the Republic will not be able to fly into the sky. The pressure in the Ninth Academy is already great. When the time comes, Director Liu, who has all the pressure, will fall, and the entire Ninth Academy will be finished.

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

"That's good, you are responsible for this matter. You don't have to go back to the base now. Who you want? Tell Director Xie and Director Zhao to specifically solve this problem. As long as this problem is solved, it doesn't matter if it is you or 132. The people in the factory should definitely be rewarded! There are a lot of houses and tickets!" Liu Yijiu said excitedly.

Technical problems really have to be solved by these professionals.

"As soon as possible, I need to see that our own fighter jets have their own hearts and fly into our blue sky!" After Liu Yijiu said to Xie Heping and Zhao Liangbi, he said earnestly, "In addition, the problem of the five-axis machining center , Must be resolved as soon as possible!"