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Chapter 617 World Class

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    The chiefs who came to inspect knew that Ascendas Group was top-notch in the industry, but they did not expect it to be so top-notch. You must know that these chiefs do not only study strategies and tactics, and direct wars. Many of them have professional engineering backgrounds.  , there were even several who were sent to the Zhukovsky Institute of Aeronautics and Astronautics of the Soviet Union for further studies in the 1950s and 1960s.

    Belongs to a proper technical leadership.

    So they are very aware of the value of the nb-800 telephone CNC machine tool introduced by Liu Chun. They have no choice but because this type of special processing machine tool is too important in the aerospace field.

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

    For example, for the finishing of the inner hole of the low-pressure turbine of an aerospace engine, the traditional process requires several machine tools such as boring machines, milling machines, lathes, and grinders to be used in turn. In addition, several heat treatments are required to consolidate the materials.

    After the emergence of multi-axis machine tools, complex multi-machine joint machining will no longer be necessary. It can be completed with one machining center. After one heat treatment, the finishing of the inner hole of the low-pressure turbine is completed.

    But is this really perfect?

    Obviously not. This is mainly because the low-pressure turbine inner bore of the aeroengine has a long shaft hole, thin walls, small holes on both sides, a large hole in the middle, and complex arcs in the inner wall. It is an important load-bearing structure of the aeroengine. It not only requires  The machining accuracy is extremely high, and no stress or deformation occurs in the components during the machining process.

    The accuracy of the multi-axis machining center is undeniable. However, because its processing method is mechanical cold processing using mechanical tools to hit the component itself, stress deformation cannot be avoided. This is why a key heat treatment is required after processing. The main purpose is to  Eliminate the stress deformation of the components. Otherwise, if installed in the aero-engine, the service life will be short. If the internal twisting breaks and the engine stops, it will be worth the loss.

    EDM CNC machine tools do not have this constraint. This is mainly because this type of machine tool is not a true contact machining, but a non-contact machining that uses the pulse discharge generated by the tool and the workpiece, so it will not cause stress and stress on the components.  Deformation.

    As for the microscopic cracks easily caused by traditional machining, it is even more impossible. At most, it will form a shallow electric heating white layer. How shallow?

    It¡¯s only 0.01 mm!

    This thickness is completely negligible for general parts, and even parts with high requirements can be easily processed through special means.

    In other words, aerospace components processed using EDM CNC equipment not only have high precision but also have a wide range of materials. After processing, they can be directly packaged and shipped from the factory with simple processing. Compared with traditional mechanical processing, there is one less step of heat treatment.

    What's this?

    Streamline processes and improve efficiency!

    Just because of these eight words, any company in the world will go crazy. You must know that heat treatment is an instant technology and a costly process. If the control is not good enough, all the parts in the furnace may be scrapped. How can such a process be eliminated?  It¡¯s good news for any manufacturing industry.

    Therefore, foreign aviation manufacturing powers have been popularizing EDM CNC technology since the 1970s, especially the United States, which has been at the forefront in this regard. Europe is lagging behind, but it has made some popularization through the introduction of American patents, but overall it is still  Rely on German multi-axis machining machine tools.

    There are applications in the Soviet Union, but Lao Maozi has just started in CNC, and it has been shattered before it goes deep. Therefore, their EDM is popular, but it does not have the leap-forward automation and high precision like Europe and the United States.

    ¡°The country is still very close to foreign technology. Naturally, we know the advantages of EDM CNC machine tools, and we have long wanted to introduce them from developed countries such as the United States.

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

    Originally, these leaders were thinking about waiting for the international situation to stabilize and finding other ways to get a few units from Europe and the United States. Unexpectedly, they actually saw them here at Ascendas Group, and not just one, but three or four.  There are only one or twenty units in total, which is a bit scary. If you know that other manufacturers can have one, they can say that they are the leader in the country. But if Ren Tengfei Aviation Power actually has one or twenty units, isn't it one of the best in the world?

    "No wonder General Manager Liu said that they can compress the schedule to half a month. With so many EDM CNC machine tools, they cover almost all the processing of key components of aerospace engines. Without the complicated heat treatment process, it is not impossible to compress the production cycle.  "While Liu Chun was introducing several EDM CNC machine tools with different functions, some knowledgeable chiefs or technical officers had already begun to discuss them in private.

      Listening to the evaluation of an officer next to him, a chief nodded in agreement: "It is indeed true. Internationally, this type of machine tools are high-tech processing equipment that is restricted for export by developed countries. Tengfei Group has been able to break through. Obviously, these years  We all underestimated it.¡±

    "Yes." Another troop leader wearing a navy uniform said with the same emotion: "Everyone thought that Ascendas Group was just trying to make money. Unexpectedly, they did not give up in the field of high-end technology. To put it bluntly, there is no vortex.  Fan engine, this model nb series electric spark CNC machine tool is enough to establish Ascendas Group¡¯s position in the domestic aviation industry.¡±

    "That's true, but have you noticed that the head of the headquarters and the two comrades of the Second Artillery Corps are not as surprised as we are?" At this time, a unit chief from the Air Force suddenly reminded him.

    The several army chiefs who fell behind looked at the head of the headquarters. Indeed, as the head of the air force in front of them said, the head of the headquarters was not too surprised, but had an indescribable look of relief on his face.

    And the two troop chiefs from the Second Artillery Corps who followed the chief of the General Logistics Department were surprisingly bland, looking like they were just going through the motions.

    They are not stupid people. As soon as they saw the scene, they knew that the aerospace department had already had these CNC equipment in front of them. This also explains why these things have never been known to outsiders. It is obvious that these machine tools are new missiles of the aerospace department.  The supporting processing equipment involves important equipment of the country, and a period of sensitive period is inevitable.

    But now it seems that this sensitive period has been relaxed, otherwise the head of the headquarters would not be able to bring them here. You must know that in some cutting-edge manufacturing fields, they, the leading cadres at the level of the head of the army, are also out of reach.

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