You must know that these leaders do not only study strategy and tactics and command wars, but many of them have professional engineering backgrounds, and some of them were even sent to the Zhukovsky Aerospace Research Institute of the Soviet Union for further study in the fifties and sixties.

Belong to the proper technical leadership.

Therefore, they are very aware of the value of the NB-800 telephone CNC machine tool introduced by Liu Chun, but there is no way, because this kind of special processing machine tool is too important in the aerospace field.

So that in some aspects, high-precision multi-axis CNC machine tools can not do, EDM CNC machine tools can easily do.

For example, for the finishing of the inner hole of the low-pressure turbine of the aero engine, the traditional process requires several machine tools such as boring machines, milling machines, lathes, and grinding machines to take turns to do not count, and several heat treatment to consolidate the material in the middle.

After the emergence of multi-axis linkage machine tools, complex multi-machine tool combined processing is no longer necessary, a machining center can be completed, and then a heat treatment, the finishing of the low-pressure turbine bore is completed.

But is it really perfect?

Obviously not, this is mainly because the low-pressure turbine inner bore shaft hole of the aero engine is long, the wall is thin, the holes on both sides are small, the middle hole is large, and there are complex arcs in the inner wall, and it is an important load-bearing structure of the aero engine, which not only requires extremely high machining accuracy, but also cannot make the parts stress deformed during the processing process.

The accuracy of the multi-axis machining center is not to be said, but because its processing method is the use of mechanical tools to the mechanical cold processing of the component itself, stress deformation can not be avoided, which is why a key heat treatment is also needed after processing, the main thing is to eliminate the stress deformation of the components, otherwise it is installed in the aero engine, the life is short, and the engine is not worth the loss if the internal torsion is not good.

EDM CNC machine tools do not have this shackles, mainly because this kind of machine tool is not real contact processing, but non-contact processing using the pulse discharge generated by the tool and the workpiece, so there will be no stress and deformation on the components.

As for the microcracks that are easy to be caused by traditional machining, it is even more impossible, at most it forms a shallow electric white layer, how shallow?

But 0.01 mm!

This thickness is completely negligible for ordinary parts, and even the most demanding parts can be easily disposed of by special means.

In other words, the aviation parts processed by EDM CNC equipment not only have high precision, but also have a wide range of materials, and can be directly packaged and shipped out of the factory with simple processing after processing, which is one step less heat treatment than traditional machining.

What is it?

Streamline processes and increase efficiency!

Just for these eight words, any company in the world will be crazy, you must know that heat treatment is a process that eats technology, and burns money, a little bit of control is not good, a furnace parts may all be scrapped, can be less such a process is simply a gospel for any manufacturing industry.

Therefore, foreign aviation manufacturing powers have been popularizing EDM CNC technology since the seventies, especially the United States, which has been at the forefront in this regard, and Europe is worse, but through the introduction of American patents, it has done some popularization, but overall it still relies on German multi-axis machining machine tools.

The Soviet Union also had applications, but Lao Maozi had just started in numerical control, and it was shattered before it went deeper, so their EDM popularization was popular, but it did not have the leap of automation and high precision in Europe and the United States.

Domestic technology to foreign technology is still very close in the end, naturally know the advantages of EDM CNC machine tools, has long wanted to introduce from the United States and other developed countries.

However, developed countries even multi-axis machining machine tools are included in the export restriction list, this kind of high-precision EDM CNC equipment that can produce high-quality aerospace products is more strictly controlled, and there is no door to buy it.

Originally, these chiefs were still thinking about whether to wait for the international situation to stabilize, and find other ways to get a few units back from Europe and the United States, but they didn't expect to see it here in the Tengfei Group, and it was not one, but three or four types, a total of one or twenty units, which is a little scary, to know that other factories can have one dare to say that they are leading in China, but people take off aviation power, there are one or twenty units, is it not among the world's first-class?

"No wonder this Mr. Liu said that they can compress the schedule to half a month, so many EDM CNC machine tools, covering almost all the processing of key components of aero engines, removing the complicated heat treatment process, compressing the production cycle is not impossible. When Liu Chun introduced several EDM CNC machine tools with different functions, some knowledgeable chiefs or technical officers had already begun to discuss in private.

Listening to the evaluation of an officer next to him, a chief nodded very approvingly: "Indeed, this kind of machine tool belongs to the high-tech processing equipment that is restricted from export by developed countries in the world. ”

"Yes. Another head of the army wearing a navy uniform also sighed: "I thought that Tengfei Group made money, but I didn't expect them to give up in the field of high-end technology, to put it mildly, that is, there is no turbofan engine, just with this model NB series EDM CNC machine tool is enough to establish Tengfei Group's position in the domestic aviation industry." ”

"That's right, but have you noticed that the head of the headquarters and the two comrades of the Second Artillery Corps don't seem to be so surprised by us?" At this time, a unit commander from the Air Force suddenly reminded him.

Several of the leaders of the troops who fell behind looked at the head of the headquarters at this time, and indeed what the head of the air force unit in front of him said, the head of the headquarters was not too surprised, but showed an indescribable look of relief on his face.

The two heads of the troops from the Second Artillery Corps who followed the head of the General Logistics Department were even more insipid and surprisingly bland, looking like they were going through the motions.

It's not stupid, just look at the scene, you know, these CNC equipment in front of you have long been in the aerospace department, so it explains why these things have never been known to outsiders, it is obvious that these machine tools are the supporting processing equipment of a new type of missile in the aerospace department, involving the country's heavy weapons, a period of sensitive period is inevitable.

However, it seems that this sensitive period has been loosened now, otherwise it would be impossible for the head of the headquarters to bring them over, and you must know that in some cutting-edge manufacturing fields, they are also out of reach of leading cadres at the level of the head of the army.