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Chapter 612 Self-growing metal parts

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    If the "air car" surprised Wang Huan and others because of its weird shape and the way it was installed on the plane, then Qiao Shiming's words just now really shocked these people.

    There is no way, because compared to the sensory stimulation of the "air car", the repair of the low-pressure turbine blades of the jt9d turbofan engine can really touch the soul of the people in Shanghai Airlines.

    You must know that the repair of aero-engine turbine blades is an extremely high-end category abroad, let alone in China. It cannot be done by just bringing in a company or factory.

    After all, turbine blades are one of the most critical core heated components of aeroengines. They need to withstand high temperatures of thousands of degrees Celsius and unimaginable high-speed centrifugal force. Therefore, turbine blades are top-notch in the industrial category in terms of materials, technology, and processing.

    Especially for high-thrust turbofan engines like the jt9d turbofan engine, the production process of turbine blades is quite complex. If nothing else, the film cooling holes and internal cavities used for heat dissipation are an extremely exquisite art.  Quality, but one point more is superfluous, one point less performance is not enough, it has reached an unprecedented extreme.

    It is such a crystallization of human industry that is comparable to a work of art. It is really like making a dojo in a screw shell to repair it. It is not ordinary difficult.

    Because of this, only the United States and a few European companies controlled by the United States can do this type of turbine blade repair worldwide. Maverick countries like France can do it, but the overall quality is not as good as that of the United States.  Countries like Japan simply do not have the corresponding capabilities, so they dare not touch it and can only leave it to the United States.

    As a result, Qiao Shiming said that the low-pressure turbine blades of the jt9d turbofan engine shipped three days ago had been repaired?

    Although the main cause of the jt9d turbofan engine failure this time was not a major problem of damage or fracture of the turbine blades, it was just an increase in the fit gap between the shroud of the front section of the low-pressure turbine blades and the sealing ring of the outer honeycomb assembly due to long-term use.  , triggering an aircraft engine alarm.

    Strictly speaking, maintenance is not as difficult as the low-pressure turbine blades themselves, but relative to the complexity of the low-pressure turbine blades themselves, in fact the overall difficulty is still higher than that of other components.

    The first thing is the material. Because it needs to withstand certain high temperatures and pressures, the shrouds of low-pressure turbine blades are integrally cast with high-temperature resistant nickel-based alloys.

    The second step is heat treatment. Because of the unique properties of high-temperature-resistant nickel-based alloys, the heat treatment needs to be very meticulous. There are extremely strict requirements on quenching, tempering, and the cooling medium to be used. The temperature is controlled within 1 degree Celsius.  Otherwise, the entire component may be scrapped due to changes in the internal metallographic structure.

    The third step is machining. Needless to say, machining in aviation can only be done with precision. It must either have high-precision machine tools or have highly skilled level eight workers, otherwise it will be difficult to achieve that.  The ultimate precision.

    The last thing is the combination with the blade, so the precision welding process cannot be avoided. Although there are many subdivided methods, no matter what method they are, they are all at the forefront of the welding field.

    In summary, it is just a general direction, and there are many details in it, each of which is the top of the high-end. Otherwise, the aerospace engine would not be called the crown jewel of the industry. It is the ultimate.

    ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????Tengfei Aviation Maintenance Factory actually succeeded?

    It has only been three days and 72 hours since the jt9d turbofan engine arrived at the factory. Has the damaged crown of the low-pressure turbine blade been repaired?

    Not to mention an expert like Wang Huan, even a half-hearted person like Qi Hong wondered whether his ears had heard it wrong. You must know that the Boeing 767 failure of their airline was sudden. It was impossible for Ascendas Aviation Repair Factory to know in advance, let alone  Maybe the materials and plans prepared in advance were completely temporary. How could the unprepared Ascendas Aviation Repair Shop be able to repair it so quickly?

    If nothing else, how to deal with the materials?

    Normally, it takes more than three days from synthetic materials to integral casting, let alone the subsequent heat treatment and machining.

    We must know that in the past, when outsourced maintenance companies in the United States or Europe helped Shanghai Airlines to repair damaged crowns of low-pressure turbine blades, the minimum cycle time was about one and a half months. As a result, it only took three days for Tengfei Aviation Maintenance Factory. Why?  possible!

    Seeing that Wang Huan and others didn't believe it, Qiao Shiming didn't explain too much, but pointed to the small factory on the other side: "Go there and have a look first."

    After saying that, he lifted his legs and left.

    "Wang Huan and others were stunned for a moment, and they thought to themselves, old man, could you please answer the question first? It would be very annoying if you were banging a hammer here and there.Crazy.

    Fortunately, Zheng Yongning opened his mouth to explain at this time: "Mr. Wang, Manager Qi, let's go over and take a look. It's a new process that our factory has just applied. It takes three days to repair the damaged crown of the low-pressure turbine blade of the JT9D turbofan engine."  Benefit from this new process.¡±

    ¡°After saying this, Wang Huan and others understood what was going on, and they immediately became interested. What kind of technology can three days of high-end repair work be done?

    With three parts of suspicion, three parts of curiosity, three parts of expectation and one part of caution, Wang Huan and others followed Qiao Shiming and soon arrived at the small and inconspicuous factory. As soon as they entered, they were greeted by  Everyone had a weird feeling, because the entire interior was more like a laboratory than a factory, with various instruments, various display devices, and shiny calculations and processors, plus those in white coats walking back and forth.  The staff made Wang Huan and others think that they were in the wrong place.

    Just as he was about to ask Zheng Yongning next to him whether this was a production workshop, Qiao Shiming suddenly said: "Well, it's just in time. They just started processing the crown of the new low-pressure turbine blade."

    When talking about the center of the factory building, everyone immediately looked at the trend, and saw that the center of the factory of the rear glass stood with a large and more than three meters wide equipment.

    However, although the equipment is large, most of it is a support mechanism or auxiliary structure. The real core is the translucent workbench in the center that is no more than the size of an 18-inch TV.

    Inside, something similar to a processing probe is moving back and forth flexibly.

    "This isa multi-axis machining center?"

    Because of the distance, the workbench on the equipment was too small, and his eyesight was not very good, Wang Huan couldn't see clearly what was going on inside. But from the overall structure, it fit Wang Huan's idea of ??multiple axes.  Machining center settings.

    Zheng Yongning on the side smiled: "This is much more magical than the multi-axis machining center. Wang Gong, look here, there is real-time monitoring on the screen."

    After being reminded like this, Wang Huan noticed that the screen on the console next to him happened to be the screen inside the equipment workbench, and he quickly raised his glasses and looked closely.

    On the black and white screen, the flexible probe rotated along a strange trajectory, and then a sending device blocked it, and then the probe continued to move in strange circles.

    Wang Huanbian frowned after just two glances. What is this? It¡¯s not a multi-axis machining center. What is that?  Bored of circle drawing machine?  Should Ascendas Aviation Maintenance Factory be so boring?

    Just when Wang Huan was about to say a few words, Qi Hong suddenly touched him with his hand, then pointed at the screen with a ghostly look on his face and said: "Mr. Wang, look, the metal parts are going up layer by layer.  long."

    Hearing this, Wang Huan looked carefully again, and his expression was the same as Qi Hong's. The metal parts in the workbench were really growing on their own.

    If you like Soar My Aviation Age, please collect it: Soar My Aviation Age is updated the fastest.  (Remember the website address: www.hlnovel.com
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