Yi Chunhua was also polite, and did not forget to visit Tang Fei here.

It can be seen that Yi Chunhua's mental state is good, and his mood seems to be very good, which is completely different from before, mainly because the new aero engine they independently developed and the prototype UAV engine are progressing relatively smoothly, and many technical problems have been solved.

For example, the new engine they independently developed originally faced some technical problems, but inspired by the design data of the UAV engine, these technical problems have been basically solved. UAV engines face some technical problems in production and trial production, which have also been solved, such as machining accuracy problems.

More than 10 kinds of parts that can not meet the requirements in terms of machining accuracy, they only need to carry out the preliminary process, start processing from the blank, only do rough machining and semi-finishing, involving some high-precision dimensions and high technical requirements of the finishing process, then put in Jiuzhou Heavy Industry for processing.

The first kind of parts has already arrived, a whole whole box by air express. These are the fan blades of the drone engine, which have been processed in the semi-finishing process at Plant 336, followed by the finishing of the complex blade profile.

The blade profile is very complex, as it has to meet the aerodynamic requirements. When the engine is working, the fan rotates at high speed, and the fan rotor sucks in the outside air and compresses it, part of which is supplied to the compressor behind, and some of the air is directly discharged from the back of the fan to generate thrust.

Therefore, the quality of fan blade processing is directly related to the overall performance of the whole engine, the fan blades of these UAV engines are designed very scientifically, but also like other turbofan engines, the profile of the fan blades is very complex, and high-precision five-axis linkage machining centers are required for precision milling processing.

The 336 factory does not have a high-precision five-axis linkage machining center, they only have a few domestic five-axis, which can not achieve such precision requirements, and the processed blades cannot meet the quality and design requirements.

Yi Chunhua is very polite, he first visited Tang Fei after arriving in Shenhai City, accompanied by Yang Chenglin, came to the door of Tang Fei's office, after knocking on the door and entering, he first said politely and politely, "Mr. Tang, hello, I am Yi Chunhua from Factory 336, I came to disturb you." ”

Tang Fei, who was reading some recent documents and reports, immediately put down the things in his hand and said enthusiastically: "Oh, it's Mr. Yi, I know you've arrived, please sit here." ”

Seeing that Tang Fei was so enthusiastic and didn't have the slightest shelf, Yi Chunhua, who was a little nervous, suddenly relaxed a lot, and sat down on the sofa in the hospitality area.

Someone immediately came over to make hot tea, Tang Feilai also came over, sat down on the sofa in the hospitality area, and began to talk to Yi Chunhua. The people of Factory 336 have arrived at Jiuzhou Heavy Industry under the leadership of Yi Chunhua, and they came with a box of fan blades that have reached a semi-finished state.

Zhu Yifeng had already reported to Tang Fei, Tang Fei originally thought that Yi Chunhua would immediately devote himself to the finishing of these blades after he arrived, where did he think that he would come to visit him first, this is a person who knows how to be polite and grateful, Tang Fei thought so in his heart.

Yi Chunhua really showed gratitude, "Mr. Tang, our first batch of parts has arrived, this is the fan blade of the drone engine, a total of dozens of pieces, because of your detailed set of design technical data and process technical data, the current production trial production of drones is progressing very smoothly, many parts have been processed for processing, and even some have reached the finishing process." ”

"Inspired by the design data of the drone engine, the new aero engine we independently developed has been facing a series of technical problems, and now they have all been solved, thank you so much. ”

Tang Fei smiled happily: "Chief Engineer Yi is too polite, we just did some trivial things, I heard that the trial production of the drone engine is going so smoothly, I am also relieved, I want to thank you for your contribution to this drone." ”

Chunhua hurriedly said: "Where, where, we don't dare to be, this time the production of trial production of drone engines, we have taken a big advantage, such a detailed and high-tech design information, even if you spend money can not buy, and you provided us with 336 factory free of charge, thank you so much." ”

After Yi Chunhua thanked him, he also gave Tang Fei a detailed introduction to the progress of the trial production of the UAV engine, such as which key and important parts have entered what process, such as which parts have been put into the material and manufactured blanks, such as which parts have been carried out strength and fatigue tests, etc.

After listening to Yi Chunhua's report, Tang Fei was really completely relieved, and thought in his heart, according to the current progress, it will not take two years at all, the first engine will be trial-produced in the 336 factory, maybe in the first half of next year, at the latest will not exceed the second half of next year, the first engine will be submitted to Jiuzhou UAV Company by the 336 factory.

At present, the production and manufacturing of the UAV body is relatively smooth, because there is a complete set of detailed design technical data and process technical data. Moreover, this domestic aircraft factory, with its large scale, strong strength, and good hardware facilities, should also be able to submit the relevant parts of the airframe to Jiuzhou UAV Company in the second half of next year.

On the part of Jiuzhou Industrial Group itself, the trial production of related parts of the UAV has also been relatively smooth, and even some purchased parts have been purchased from outside and placed in the warehouse of Jiuzhou Industrial Group, just waiting for future assembly.

After listening to Yi Chunhua's report, Tang Fei was very interested, raised his hand to look at the time, and invited: "Let's go, let's go to dinner now, and start processing fan blades in the afternoon." ”

This batch of fan blades arrived at Jiuzhou Heavy Industry in the morning, and after arriving, under Zhu Yifeng's arrangement, they were already starting to do some pre-processing preparations, and the first processing could be carried out in the afternoon, Tang Fei wanted to take a look. This is the fan blade of the drone engine, what is the processing quality, Tang Fei wants to know.

Seeing that Tang Fei was going to invite himself to dinner, Yi Chunhua hurriedly said: "Mr. Tang, I'll invite you, I'll invite you." ”

"No, no. Tang Fei waved his hand and said: "It's just a meal, you are a guest from afar, or I will invite you, if I go to Factory 336 next time, I will not be polite, then you will be treated." ”

Yi Chunhua said: "Welcome Mr. Tang to the 336 factory to see the progress of the trial production of the engine, and we will treat you with the highest courtesy." ”

Tang Fei smiled and said, "Then you guys are too polite, let's go to dinner first." ”

There is a super five-star hotel in the International Finance Building, where the environment and the taste of the food are very good, Tang Fei often goes there to eat, and this time is the same.

Everyone and their group, Wang Hailong and Yang Chenghua also came over, asked for a private room, and had a lunch at the hotel. After the meal, Tang Fei and Yi Chunhua went to Jiuzhou Heavy Industry.

Under the leadership of Zhu Yifeng, everyone entered the production site. One of them, the smaller precision five-axis, is ready to start finishing the first fan blades.

It can be seen that Yi Chunhua and they are still very cautious, and there are two process specimens that come over with this batch of fan blades. The so-called process test piece is exactly the same shape and size as the formal part, but the material is different, generally as the process part before the first processing, in order to verify the processing program, whether there is no problem in the processing process.

Since Yi Chunhua suggested that the process specimen be processed first, Tang Fei and Zhu Yifeng completely followed his opinion. At present, on this precision five-axis is a process specimen.

Everyone walked to the side of this precision five-axis, and Zhu Yifeng introduced: "Boss, all the preparations are ready, and now you can process them." ”

Tang Fei also looked at it seriously, and felt that there was no problem, so he waved his hand and said, "Then give it a try first." ”

This machine is operated by an experienced worker. It can be seen that Zhu Yifeng also attaches great importance to this processing, and selected the elite soldiers, and he specially selected the best technical level among the three skilled workers who operate this precision five-axis.

Seeing so many people beside him, even Tang Fei came over in person, he didn't dare to be careless, he had already finished the knife alignment, and before the processing began, he carefully re-aligned the knife and started the processing button after confirming that it was correct.

Processing begins!

The alloy milling cutter on the cutter head rotates rapidly, making a gentle humming sound, and the milky white coolant sprays out, splashing a large amount of water, and the situation inside can be clearly seen through the glass of this precision five-axis safety door.

The precision five-axis spindle moves quickly to reach the specified position, and the high-speed rotating alloy milling cutter begins to cut the parts, and a large number of fine metal chips are cut off quickly, just like cutting tofu, showing the ultra-high hardness of this alloy milling cutter, which also means that it is very sharp.

In everyone's eyes, the alloy milling cutter is rapidly milling this process specimen on the workbench, and its material is also titanium alloy, and the processing performance is relatively close to the formal parts.

The alloy milling cutter is rounded and milled on the surface of the blade. You can see that the milled blade is very smooth and beautiful, and everyone's eyes are on this piece of blade that is being processed.

Minute by minute, after about half an hour, the machining stopped, and under the CNC program, the spindle began to retract and the coolant stopped spraying.

The worker opened the precision five-axis safety door, first looked at this process test piece, and then took out the measuring tool, measured several main dimensions, he felt that there was no problem, and then the process test piece was disassembled from the workbench.

Zhu Yifeng personally took this process test piece from the hands of the workers and said to Tang Fei: "Boss, you see that the processing is not bad." ”

Tang Fei took it in his hand, looked at it with great interest, and said in his heart, the processing is indeed very good, the surface is bright, and it looks very beautiful, especially its complex leaf shape has a unique beauty.

After the dimensional measurement and the blade shape scanning, it fully meets the design requirements, which shows that there is no problem with the CNC program and the machining process, and the processing of formal parts can be carried out.

Tang Fei said personally: "Lao Zhu, start the processing of formal parts!"

Not only Tang Fei, everyone wants to see what the first formal part looks like, is it also the same exquisite and beautiful?

………

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