Sure enough, Miguel said apologetically: "Mr. Li, I'm very sorry, the company has important affairs, I must return to China immediately, and the cooperation between us can only be postponed." ”

Li Tianfeng knew that "postponement" was a euphemism, perhaps, this matter would be shelved indefinitely, and the cooperation between the two sides might also be in vain, thinking about this, Li Tianfeng was extremely depressed.

Seeing that the cooperation is about to be negotiated, the cooperation agreement is about to be signed, but at this critical moment, it is strange that the mood can get better because of a phone call.

Miguel also knew that he was at a loss, stood up, apologized to Li Tianfeng and others again, and said again: "Mr. Li, I'm really sorry!" ”

At this point, Li Tianfeng waved his hand and said, "Forget it, Mr. Miguel, I know that you can't be blamed for this, it should be the phone number of one of your bosses just now." ”

Miguel nodded, "Mr. Li, after I return to China, try my best to fight for it, I personally think that your turboshaft E engine is very suitable for many of our helicopters." ”

After speaking, Miguel shook hands with Li Tianfeng and the others one by one with apologies, and then hurriedly walked out of the conference room with his subordinate and translator.

………

Tianfeng Technology Company.

In the past two days, Li Tianfeng finally figured out what was going on with Miguel, and now, Zhang Haiping also called him personally, because what happened at the beginning, Zhang Haiping was still looking for a relationship, and Zhang Haiping was also anxious.

Zhang Haiping said: "Mr. Li, you see this thing, oops, I'm really sorry." ”

Li Tianfeng said: "Director Zhang, the matter has nothing to do with you, the main thing is that someone is stirring up the situation, otherwise." We have formed a cooperation with the Amazon Aviation Industries, and at the beginning, we negotiated the price, but at the critical moment we were disturbed by a phone call. ”

Zhang Haiping said: "Mr. Li, do you already know that someone is stirring up the situation?" I just found out, but I didn't expect it. There are also such people who do not ignore the rules of competition. ”

Li Tianfeng said: "Their turboshaft engine is obviously inferior to our turboshaft E engine, this time, if the Amazon Aviation Industry Company really chooses them, I think, the Amazon Aviation Industry Company has taken a stupid step." ”

Zhang Haiping nodded and said: "Mr. Li, I'll help you find a relationship again, and when Miguel comes back from Brazil, I'll ask you to have a good talk with him." ”

Li Tianfeng said: "Director Zhang." Forget it, I understand your kindness, let's do this matter. ”

Just giving up like this, it is definitely not Li Tianfeng's character, some efforts that should be done must be done, and it is definitely necessary to try your best to fight for it. Li Tianfeng is also unwilling to lose such a big customer, because the Amazon Aviation Industry Company produces a lot of helicopters of various types every year. There are many turboshaft engines in demand.

Zhang Haiping thought for a while and said: "Mr. Li, that's okay, but if you have any difficulties, remember to call me, as long as my old Zhang can help." I will definitely leave no stone unturned. ”

The two chatted on the phone, and after hanging up the phone, Li Tianfeng thought in his heart, Zhang Haiping is good, and he can be regarded as the kind of friend who can make friends with him.

Li Tianfeng thought in his heart. Just give up like this, Lao Tzu will definitely not be reconciled. Thinking so in his heart, Li Tianfeng picked up the phone again and dialed a number......

………

Tianfeng Technology Company, blade processing workshop.

Although the design work of Tianfeng Technology's medium-sized turbofan engine with a thrust-to-weight ratio of 10 has not been fully completed, some parts have begun to enter the trial production stage, such as wide-chord hollow fan blades.

This kind of fan blades, the production process is more complex, the main process is superplastic molding and diffusion connection process, as the director of the process technology department of Tianfeng Technology Company, chief technologist, Zeng Qinghai is in the processing site.

Last month, Tianfeng Technology Company promoted a group of middle and senior managers, and Zeng Qinghai, the Minister of Process Technology, was also promoted to become the Chief Technologist and Minister of Process Technology of Tianfeng Technology Company.

Not only has a group of middle and senior managers been promoted, but also Tianfeng Technology Company has recruited a group of high-end technical talents, including more than a dozen postdoctoral fellows and more doctors, involving materials, technology, design and other fields.

Now Tianfeng Technology Co., Ltd. has a certain reputation in China, especially in the aviation industry, the ability to attract talents is relatively strong, coupled with Hu Xiao, the director of the human resources department and human resources director with excellent ability, every year to develop a very scientific talent recruitment plan, Tianfeng Technology Company's talent team structure is more perfect, more powerful.

Blade processing workshop, this is the professional blade processing workshop of Tianfeng Technology Company, Zeng Qinghai personally at the processing site, personally concerned about the processing of the first batch of fan blades.

This batch of blades is extremely advanced in design, and the manufacturing process is also relatively complex, and Zeng Qinghai attaches great importance to the first batch of processing, especially this superplastic molding and diffusion connection process, which is a new manufacturing process for Tianfeng Technology Company.

These fan blades, each piece is divided into two pieces at the front and back, that is, the blade basin and the back of the blade, the two blades are combined, and the middle is filled with metal honeycomb, which is a complete blade.

These blanks, the blade shape has been precision blade CNC machining in accordance with the process requirements, and it is still a very advanced high-speed and high-precision grinding process, each blade is processed very beautifully, very exquisite.

These fan blades are beautifully machined and very delicate, but they are only semi-finished, not only are the blades a little flat, they are far from the beautiful pneumatic layout of the final blades, and the tenon and groove have not yet been finished.

Zeng Qinghai was holding a piece of semi-finished fan blades and looked at it with satisfaction, even if it was a semi-finished product, it was processed exquisitely enough and beautiful enough. Because it was the first time to process, Zeng Qinghai put forward high requirements in the process in order to ensure the success of the one-time processing.

Just as he was holding the blades and looking carefully, Li Tianfeng walked in from outside the blade workshop and walked all the way to the side of this batch of blades.

Zeng Qinghai said: "Boss, all the process preparations have been made and are ready to start processing." ”

Li Tianfeng nodded and said: "Then let's start now and see if our fan blade processing can be successful." ”

Zeng Qinghai nodded, and motioned to the technician in charge next to him to start starting, because it involves advanced new process methods, there are many process technicians here, Li Tianfeng nodded to everyone, which can be regarded as a greeting.

After the signal, a worker carefully applied the anti-flux on the mold evenly, the mold was designed and processed by Tianfeng Technology Company, the working surface of the mold is the same as the final blade shape of the fan blade, and the abrasive tool is divided into two parts.

Everyone did not speak at the scene, everyone looked at the worker carefully, and a supervisor next to him took a thick blank paper processing process to guide the worker to operate.

The purpose of coating the mold with flux stop is to prevent the blades from sticking to the mold and not being able to remove them when the superplastic molding is formed.

After applying the flux stopper, the worker carefully checked it again, confirmed that it was correct, picked up two blades that had been matched long ago, and on the two relatively flat blades, the parts where the two blades were in contact with each other together, and carefully coated the solder agent in accordance with the process requirements.

Wait a minute, under a certain pressure and temperature, these two blades will be welded together to form a whole, but also constitute a finished blade, of course, under the action of the mold, these two blades welded together, the blade shape will change, and finally gradually achieve the final design requirements in line with the blade type.

This is a superplastic molding process, the purpose of which is not only to weld the blades together, but also to make the blades finally formed to meet the design requirements.

The two blades are coated with flux, and then a core board that has been prepared and processed to the specified size and shape is placed between the two blades, as if it were a hamburger, and the two blades are sandwiched with a layer of core board.

Put the two blades in line, install the core board in the middle, and then put it into the mold, press the start button, the mold begins to slowly press down, and the temperature rises, and the air in the mold cavity is pumped out.

This set of special molds is very large, specially used for the superplastic molding and diffusion welding of this fan blade, the structure is also more complex, the mold is much higher than a person, digital display, digital control.

Tianfeng Technology Co., Ltd. can develop a more high-tech aero engine, such a set of molds is no problem, a few months of effort, the mold will be ready and can be used, installed in the blade processing workshop.

Such a big guy, it is more vivid and appropriate to say that it is a mold, or a blade processing equipment.

Superplastic molding has strict process parameters, such as vacuum, pressure, temperature, time, etc., and must be carried out in strict accordance with the process parameters and steps.

The purpose of the processing of this first batch of fan blades is to verify whether the process parameters and process steps are reasonable and scientific, and whether they need to be improved and perfected.

Internationally, the superplastic molding and diffusion connection process of wide-chord hollow fan blades has been developed to the third generation, and Rolls-Royce is the only company that has mastered the third-generation superplastic molding and diffusion joining process.

If Tianfeng Technology's process validation is successful, it will become the second aviation industry company in the world to master this third-generation superplastic molding and diffusion joining process.

The mold is gradually pressed down, the air in the mold cavity is pumped out, and 1.5MPa argon gas is blown in according to the process requirements, and it can be seen through the guò digital display screen that the temperature in the mold is rising at the speed required by the process.

Everyone looked at the number of displays on the display, the temperature has been rising, after rising to the temperature of 920 degrees, the temperature began to stabilize, under this temperature, began to superplasticize, if you can see the situation in the mold, at this moment, you must be able to see that the fan blades just put in are gradually changing.

………

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

With hard work, I still achieved three more, ask for a recommendation ticket, and support the monthly pass! (To be continued......)