Liu Yijiu felt that he was really troubled in the past few days.

Originally, hiding in the mountains, staring at a project, and solving any problems when encountering difficulties, this is a relatively simple thing, and you don't have to think too much.

But I didn't expect that as soon as I came out, the first thing I met was the Iraqi bastard, and asked him to explain the quality problem of their Longwei tank, the engines made by the same production process, the Iranians did not have problems, and they played for so long without problems, but when it came to the war, there was a problem, and they did not think about what weapons the other side might use to affect the operation of these engines, but they had to say what the quality problem was.

came out to take a break and look at the imitation F14 that was about to make its first flight, but the reality hit him so much that he had no confidence at all.

The assembly progress was slow due to process problems.

Even, in the production process, process problems have been laid out.

There is no big press, and the strength of the core key components of the fighter is not enough.

The production equipment is not good, the technical level of the workers is not up to it, so that the parts with insufficient strength have such a problem!

A series of problems such as production process, manufacturing process, strength, process equipment and technical level are like a mountain that overwhelms him.

If we can't solve these problems, even if we can replicate the F14, we will not be able to make the plane soar in the blue sky due to heart problems.

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

It is one of the highest level machinery manufacturing workshops in China. Compared to the three districts of the Ninth Academy, there is no panic.

In this workshop, due to the CNC machine tools provided by the Ninth Academy, the strength is even stronger than other domestic counterparts. If there is no way to solve the production problem here, it is estimated that the Ninth Academy is also a little hanging.

"The precision of the CNC machine tool is not enough, it must be processed and formed on the machine tool at one time, do not use the way of manual grinding, the root is the key point of the force, and the structure is slightly different under high temperature and high pressure. will cause the phenomenon we encounter. In the experiment on the ground platform, we did not encounter such a problem, because the situation encountered by the engine during the ground test was different from that in the sky...... "I visited the entire production workshop. And after seeing the polishing process, Liu Yijiu immediately stopped the ongoing work.

Discussions on such issues continued into the night.

Finally, after research and comparison, it was found. Causes such a problem. The first is that the pressure of the equipment for forging the integral turbine disc is not enough, and the pressure equipment of a larger tonnage must be replaced, and the 30,000 tons of the Southwest Aluminum Plant can be trial-produced, and it is best to find the heavy machinery factory in Shanghai City to use the 45,000-ton hydraulic press for forging; The four-axis machining center processes the integral turbine disc, which cannot be processed and formed at one time, at least five axes are required!

During secondary clamping. As a result, the benchmark of the two machining operations is different, although the deviation of this benchmark is less than 0.05 mm. But for the impeller to work in such a harsh environment, and it is also a long time to work, it is also very deadly.

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

After all, Shanghai Heavy Industry is also a military system, although they are shipbuilding, the production business is also very busy, let them help adjust, produce a few products, the problem is not big.

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

Or, use more materials and more time to train the technical level of top skilled workers with experience, so that they can become the top technical masters; Either that, you can get a more advanced, more powerful and more accurate 5-axis machining center!

First, no one chooses.

"If we train our ninth-level fitters to do such a thing, let's not talk about efficiency, just the youngest ninth-level fitters in China are in their forties, spend several years, a lot of energy and cost to train, and they are facing retirement......" Wang Shunyi, who took the Blue Army helicopter from Daba Mountain to Rongcheng 132 Factory to participate in the technical discussion meeting, directly vetoed the proposal.

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

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

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

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

Seeing that Liu Yijiu threw the pressure on himself, Xie Heping smiled bitterly, "Director Liu, although the function of our five-axis machining center has been realized, the accuracy is much worse. We can only guarantee the position accuracy within 0.05 mm, and 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 to be at least within 0.005 mm of positioning accuracy and machining accuracy, and at the same time, the indexing accuracy is within 0.01 "......"

The five-axis machining center has been carried out for so many years before it can be reluctantly built, but it is not possible to use it for the most precise manufacturing.

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

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

It's not that they don't work hard, but to meet the requirements, and at the moment, it seems that it will not be possible in a short time!

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

Everyone was silent.

Liu Yijiu knows the domestic technical level very well, but he continues to engage in projects that give the whole country a headache.

At this point, everyone has actually been mentally prepared.

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

"Xiao Liu, I think otherwise, wouldn't our imitation panda have a lot of improvements? Even if the first flight is completed, it will not be possible to complete the test flight in a short period of time if the first flight is completed. We can carry out test flights while stepping up efforts to tackle the problem of the engine, but if it doesn't work, we will reduce the maneuverability and go to the turbofan for six ......" Wang Shunyi also has a headache.

He clearly knew that the Turbofan Six was simply not enough for the Panda to perform its true performance.

Even a cobra maneuver is not possible.

Moreover, it will seriously affect the combat radius.

"With a 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, which is not enough for the F14 with a take-off weight of 26,632 kg without an external take-off, a normal take-off weight of 24,948 kg, and a maximum take-off weight of 33,724 kg.

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 various performance indicators of the entire fighter.

The thrust-to-weight ratio of the Turbofan 8 has reached 8, which is barely able to be used in line with the F14.

Changed, and imitated a fart!

"Director Liu, you think that if this is not the case, mobilize a group of top skilled workers to solve the current problem first. Other work is still going on...... "Wu Delin, who has rarely been given the opportunity to speak," put forward this opinion.

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

Challenging technology, especially difficult technical problems, is the only way to make their presence felt.

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

In terms of processing, he can play with all kinds of equipment, and the technical level is higher than that of ordinary workers, but after all, it is not the level of these top bulls who have worked for decades.

"It should be possible, but it will take time to ......" Wu Delin was also unsure.

Even if he was confident, he was not sure.

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

Everyone in the Ninth Academy 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 tell Director Xie and Director Zhao to solve this problem." As long as this problem is solved, whether it is you or the people of Factory 132, the reward must not be less! Houses, tickets, all a lot! Liu Yijiu said excitedly.

Technical problems really have to be solved by these professionals.

"Solve it as soon as possible, I need to see as soon as possible that our own fighters of our own production have their own hearts and fly into our blue sky!" After Liu Yijiu finished speaking to Xie Heping and Zhao Liangbi, he said earnestly, "In addition, the problem of the five-axis machining center must be solved as soon as possible!" ”

(To be continued.) )