Yu Shaoguang presided over the meeting.

He seemed to feel that the atmosphere in the conference room was relatively heavy, and comforted everyone: "Comrades, you don't have to be discouraged, I firmly believe that there must be a road before the car reaches the mountain, and I think the obstacles faced in the process of launching the trial production will definitely be solved." ”

In fact, as the number one, the pressure on him is also very great.

But as the leader of the team, he must always maintain full confidence, if even his own confidence is shaken, it will inevitably affect the whole team.

Seeing Yu Shaoguang say this, the heavy atmosphere in the conference room seemed to fade a little, and some people looked at Yu Shaoguang with hope.

Yu Shaoguang continued: "We are a team, if there is a problem, everyone will work together to solve it, so let's do it, Lao Yi and I will go to Beijing tomorrow to report the situation to the military and seek their help. ”

UAVs are produced and manufactured for the military, and the military is the strongest backing standing behind, and if there is a problem, you can find the military. Yu Shaoguang was going to Beijing with Yi Chunhua to report the situation to the military and seek help from the military.

So far, what are the obstacles they have encountered?

It stands to reason that there is a complete set of technical data, and the trial production can be carried out according to the technical data, and there should be no problems.

Three months ago, that is, around mid-November last year, after getting this USB flash drive full of technical data, he was ecstatic, as if he had obtained a peerless treasure.

Inspired by the technical information in this USB flash drive, many of the technical problems faced by the new engine they were developing and trial-producing were solved.

Yi Chunhua was full of confidence and thought that he would be able to successfully prototype this engine, but the actual situation gave him a hard blow.

As some parts began to enter the trial production stage, they faced two major problems, one was machining accuracy, and the other was material problems.

We know that the more advanced the aero engine, the better the comprehensive performance, the higher the requirements for materials, and the same for machining accuracy. This engine is simply the pinnacle of small and medium-sized turbofan engines, and it also puts forward high requirements for materials and machining accuracy.

However, the research and development of the system is very humane, there is no metamorphosis to put forward almost very strict requirements for materials and processing accuracy, and if the material can be replaced, the material substitution is carried out as much as possible, and most of the materials can be produced in China, or can be purchased from relevant domestic manufacturers.

But there are some key materials, which cannot be replaced, that is the hurdle that cannot be bypassed, in order to maintain the excellent performance of the engine, it cannot be replaced by low-grade materials, so such materials can only be imported.

Fortunately, the list of required materials has been given to the military, and the military is making import purchases through various channels and channels, and it may be in a few months that these materials will be in place.

The problem of materials seems to have been solved, and Yi Chunhua and they are still facing the problem of processing accuracy.

Before the materials were not in place for the time being, Yi Chunhua and the others temporarily found some alternative materials and tried to process them, which was regarded as practice.

Because the parts processed from alternative materials can only be used for experimental properties, they cannot be used as official parts of this aero engine, let alone installed and used.

It's just a matter of practicing your hands, accumulating relevant processing experience, smoothing out the process, and waiting for the formal materials to be purchased from overseas, with these processing experiences, the processing of formal parts will be much smoother.

But in the process of practicing his hands, Yi Chunhua found a problem.

The machining accuracy of some key parts does not meet the requirements, mainly because of the problem of processing equipment. The process technical data provided by the system clarifies the recommended model of processing equipment, as well as the accuracy requirements of the equipment, etc.

But Yi Chunhua and they don't have CNC equipment with the same level of accuracy, so the problem comes.

For example, a turbine blade needs a single crystal superalloy material, and at present, it is not possible to smelt a single crystal superalloy in China, Yi Chunhua they use ordinary superalloy materials to temporarily replace it, and after the blade is forged, it is necessary to process the blade profile on a high-precision five-axis machining center.

The blade profile is complex, and the precision requirements are also very high. Failure to achieve the required accuracy will affect the performance and quality of the engine, because the turbine blades are one of the most critical parts in the whole engine.

Yi Chunhua They have several CNC five-axis machining centers, all of which are manufactured by North Hehai Machine Tool Group, which belong to the world's quasi-first-class CNC five-axis machining center.

But this is a high-precision part for machining an aero engine, or such an advanced aero engine, they do not meet the precision requirements. Even during the Spring Festival, Yi Chunhua and others are still making various attempts and efforts, but they all fail and still cannot meet the requirements of processing accuracy.

In fact, not only turbine blades, such as turbine disks, fan blades, etc., these key parts are also facing such problems, so Yi Chunhua felt unprecedented pressure.

The accuracy is not up to it!

This is a fatal problem.

Yi Chunhua's hair seems to have turned a lot grayer. Yu Shaoguang, as the number one, also saw it in his eyes and was anxious in his heart. On the first day of work during the Spring Festival, he personally presided over the office meeting and mainly discussed this issue.

At the meeting just now, it was suggested that domestic resources should be sought to find out which companies have high-precision five-axis linkage CNC machine tools, and seek their help in the finishing process of such parts.

But looking at the country, where is there any high-precision five-axis linkage CNC machine tools, even if there is, it is rare, and it is a baby bump, whether it can help you with parts processing, or an unknown.

Yu Shaoguang is going to take Yi Chunhua with him, and he will go to the capital tomorrow to report to the military and seek help from the military.

I can't help it!

This is a project with a military mission book, and it is also a key project of the military, and the engine needed for the first drone must be trial-produced within two years, and now, three months have passed, and it can no longer wait like this.

In addition, taking advantage of this trip to the military, Yu Shaoguang is also ready to ask if the several metal materials needed for this engine have been dropped and when they will arrive.

Huaxia's material industry is still too weak, which restricts the development of aero engine technology. For example, this engine, which is basically the pinnacle of small and medium-sized turbofan engines, requires several highly technical materials, including single crystal superalloys, powder metallurgy superalloys, and a titanium alloy material.

These materials can only be imported, and the military will get them back from abroad through some channels and resources, and then hand them over to Yu Shaoguang's factory for the production and manufacture of parts for this engine.

They are ready to go to Beijing tomorrow.

…….

Deep Sea City.

The entire Jiuzhou Industrial Group has been working for two days, and in the two days after the holiday, Tang Fei mainly stayed in the Shenhai International Financial Building, and today is the first time to go out.

The first JF200A EMU entered the railway line for trial operation last year, has run tens of thousands of kilometers, and now there are about two months, it has performed well, and the relevant operating data are recorded in detail by the technical personnel of Jiufang EMU Company who carried out the trial operation with the car.

This EMU has a maximum speed of 280 kilometers per hour, which is very gratifying and much faster than ordinary trains.

Tang Fei also knows some situations. If you know that it will be in trial operation on the Beijing-long line of the north-south artery, it will go to Beijing in the north and Changzhou City in the south, and will pass through Qingjiang City on the way.

Tang Fei took Li Xueyan and Xu Guangming drove to Changzhou North Railway Station, because this EMU will arrive at its southbound terminal this morning, that is, Changzhou North Railway Station.

Once here, you'll stop at Choshu North Railway Station for the day before heading north tomorrow morning. It will also run hundreds of thousands of kilometers on the Beijing-long line, conduct detailed tests and trial run tests, collect a large number of transportation data, and conduct a comprehensive test and test on the comprehensive performance of the JF200A EMU, including its safety.

Xu Guangming drove smoothly and quickly.

Tang Fei and Li Xueyan sat in the back seat of the car and headed towards Changzhou North Railway Station. Li Xueyan even asked: "Brother Fei, when will our EMU arrive at Changzhou North Railway Station?"

Tang Fei raised his hand and looked at the time, "Well, there are still more than forty minutes, it arrived at Changzhou North Railway Station at 9:52 in the morning, after we arrived at the train station, it is estimated that it will not be long before it should come." ”

"Brother Fei, I want to take a good look at this train up close. ”

Tang Fei said with a smile: "No problem, we can still board this EMU and take a look inside the car." ”

Tang Fei went over in person, not just to board the train, on the one hand, to comfort the technicians who accompanied the train, and on the other hand, to ask these technicians about the operation of the EMU.

Li Xueyan was very happy to hear that she could also board the train to visit, which far exceeded her expectations, she originally thought that it would be good if she could walk to the side of this EMU and watch it up close.

You can actually get on the bus and visit!

Tang Fei smiled a little proudly, and his expression seemed to say, don't look at who I am, this EMU was made by us, boarding the train to visit, it's a piece of cake.

The two were in the car, chatting happily, and Xu Guangming concentrated on driving.

"Boss, the front is Changzhou North Railway Station. ”

Tang Fei nodded lightly, thinking in his heart, he didn't have to wait long, he could see this beautiful EMU again.

Xu Guangming drove and arrived at the train station, found a place to park the car in the parking area of the square outside the train station, and everyone was about to get off when Tang Fei's phone rang.

This is a call from Zhang Ping from the capital.

……

Today's three watches, the second one is sent!