Ending the call, Li Tianfeng looked solemn, and thought in his heart, there must be a reason why the American company broke the contract for no reason, but he was afraid that there was an invisible black hand behind him.

This kind of large-scale gantry CNC milling machine can mainly process aircraft skeletons tens of meters long, as well as some large sheet metal parts and structural parts. Such equipment is a key and key equipment, indispensable, considering the needs of the future, Li Tianfeng's plan, buy two at a time.

Now I have encountered such a problem, which is more tricky.

After thinking about it, Li Tianfeng called Zeng Qinghai over, Zeng Qinghai as the overall person in charge of the process, and the team led by him was responsible for the selection of processing equipment and the preparation of equipment ordering technical agreements.

Zeng Qinghai came over quickly, and after Li Tianfeng explained the situation a little, Zeng Qinghai also realized the seriousness of the matter, and said slowly: "Boss, it looks like someone stuck our neck behind our back." ”

Li Tianfeng said: "Mu Xiu will be destroyed by the forest wind, it must be our rapid development that makes some people and some companies feel the crisis and want to hinder our development everywhere. ”

Zeng Qinghai said: "Then what should I do?" This kind of large-scale gantry CNC milling equipment is very important and even indispensable for us. ”

Li Tianfeng said slowly: "Now we are preparing with both hands, on the one hand, we are waiting for the news of Jinquan Company, and on the other hand, we are looking for other machine tool equipment manufacturing enterprises to see if there is similar equipment." ”

Zeng Qinghai said: "Boss, we immediately launched an emergency plan and sought similar CNC gantry milling manufacturers around the world. ”

Li Tianfeng nodded and said, "Hold on." ”

Zeng Qinghai quickly left Li Tianfeng's office, and Li Tianfeng pondered, obviously, someone was behind the scenes.

………

Commissioning Engineering Center.

Another turbofan 21 engine was commissioned from the test bench and the engine was transported to the packing area for packing. Then there is no need to transport it to the warehouse for storage, and there is a truck waiting early in the morning.

On top of the truck, there were two people wearing COMAC overalls, and on top of the box, there was already a turbofan 21 engine in the box.

A truck. Two turbofan 21 engines were transported, directly out of here. Each time, the turbofan 21 engine was packed and shipped away as soon as the test run was completed.

Li Tianfeng occasionally came to the test engineering center to have a look, and now he happened to be here, accompanied by the general manager of the test engineering center.

Li Tianfeng said: "How many of our turbofan 21 engines have been delivered?" ”

Comrade General Manager said: "Mr. Li, exactly 50 units will be delivered, starting from next month. In accordance with the delivery contract, we began deliveries of turbofan 21 engines to Bombardier. ”

Li Tianfeng nodded and said: "Yes, after New Year's Day, it is even more necessary to start delivering turbofan 21 engines to Embraer and Boeing." ”

Comrade General Manager said: "Mr. Li, our various models, including turbofan 16, turbofan 17, turbofan 18 engine, as well as turbofan 20 and turbofan 21 engines, are very popular. But. We are also under increasing pressure on our production processes, as far as our commissioning engineering center is concerned. Several major test workshops are basically full, and sometimes they even have to start working overtime to complete the test task. ”

Li Tianfeng said: "This situation will be greatly alleviated in the near future. ”

Comrade General Manager said: "Well, the company is building a manufacturing base in Shuikou County, and many employees already know about it. Many people also heard that there is a monthly subsidy for working in Shuikou County, and they are willing to work there. ”

Hearing this, Li Tianfeng felt happy in his heart, "This is a good phenomenon, but." The Shuikou County base was officially put into operation, and it will take some time. ”

After taking a look at the test engineering center, Li Tianfeng went to the manufacturing workshops again. At present, the turbofan 25 engine has entered a full trial production, and many parts have begun to be processed in the first batch for process verification and some related test verification.

In the manufacturing workshop of large disc parts, Li Tianfeng saw the turbine disc blank of the turbofan 25 engine, and the high-pressure turbine disc had begun to be roughed.

The turbofan 25 engine and the turbofan 21 engine, the turbo part of the two is highly similar, but the size is different, and the turbofan 25 engine has a slightly larger turbo part.

The structure is highly similar, the material is the same, which determines that the processing technology is basically the same, the process method must be the same, the process parameters are basically the same, and the trial production of the turbofan part is progressing very quickly.

Seeing that the blank of the high-pressure turbine disc was being roughed, Li Tianfeng stopped next to this CNC lathe.

This is a domestic number of cars, the price is cheap, the accuracy is slightly worse, but relatively solid, such a domestic number of cars, in Tianfeng Technology Company is generally used for rough machining of parts.

Li Tianfeng asked, "How about the parts processing?" ”

Li Tianfeng saw that one of the three high-pressure turbine disc blanks had been processed, and the second was being processed on the machine tool.

The worker in charge of parts processing immediately replied: "Mr. Li, there is no problem, this processing technology is basically the same as the high-pressure turbine disk of the turbofan 21, and it is very easy to process." ”

Li Tianfeng nodded, turbofan 25 and turbofan 21 engine, the same core machine, many parts of the two engines are the same or similar, the trial production of the turbofan 21 engine, we have accumulated enough experience, now, the trial production of turbofan 25 engine parts, it will be relatively smooth, saving a lot of things.

I looked at the large disc parts processing workshop, and then in the impeller parts processing workshop and the small disc parts machining center for a long time.

Take a look at the time, there is still a little time before getting off work, Li Tianfeng walked into the precision casting workshop again, and in the precision casting workshop, Li Tianfeng unexpectedly saw Zeng Qinghai.

I saw that Zeng Qinghai was taking a few process technicians and was discussing something in front of a large precision casting mold, and when he saw Li Tianfeng, Zeng Qinghai hurriedly took a few steps forward.

"Mr. Li, this is the precision casting mold of the fan casing of our turbofan 25 engine, and we are reviewing the process of the mold."

Li Tianfeng knew that the fan casing of the turbofan 25 engine was much smaller than that of the turbofan 21 engine, and the amount of change was also relatively large.

The whole process of the turbofan 25 engine fan casing, although it also draws on the processing technology of the turbofan 21 engine fan casing, but this whole set of technology is basically re-compiled, and such a new process requires strict parts trial production and strict and comprehensive process verification.

Li Tianfeng said: "Mr. Zeng, I think it's good to have a precision casting mold for the fan casing of this turbofan 25 engine." ”

Zeng Qinghai said: "Boss, you are really a good vision, the design and processing of this set of molds, are made by ourselves, excellent quality, just now we reviewed, there is basically no big problem, the precision casting of the fan casing, it is more able to verify the quality of this set of molds." ”

Another technician in charge also said: "Mr. Li, just now we are discussing whether to carry out the precision casting of the first fan casing immediately." ”

Li Tianfeng said: "If all the process preparations are ready, you can carry out precision casting now, and I can also take a good look at the entire precision casting process." ”

Zeng Qinghai waved his hand and said: "Then start casting immediately, Li is always an expert, so you can give us some advice and suggestions for improvement." ”

The fan casing of the turbofan 25 engine, made of "Hercules" material, adopts the vacuum precision casting process, so that on the one hand, it is basically the same as the fan casing of the turbofan 21 engine.

It is not the first time that such a vacuum casting has been carried out, and the first turbofan 25 engine fan casing was finished at the end of work.

The whole process, process method, process parameters, Li Tianfeng looked very carefully, after the casing came out of the precision casting mold, Li Tianfeng took a closer look at the precision casting fan casing.

Zeng Qinghai said: "Boss, this fan casing looks pretty good." ”

The fan casing, after being cast, looks very delicate and beautiful, with almost no appearance defects.

However, Li Tianfeng still put forward some suggestions, such as increasing the casting pressure by 0.1MP, increasing the casting holding time by one minute, and so on.

Li Tianfeng suggested that everyone naturally do it, and after the precision casting process is improved according to Li Tianfeng's suggestion, the quality of the fan casing behind the precision casting is better and the pass rate is higher.

This fan casing, although there is still room for improvement, but the overall quality is not bad, everyone is satisfied, Li Tianfeng also thinks it is good.

After commending everyone's work a little, Li Tianfeng said: "Qinghai, let's go, let's talk a few words." ”

Li Tianfeng and Zeng Qinghai walked out of the casting workshop side by side, Li Tianfeng said: "Qinghai, how happened last time?" ”

Zeng Qinghai said: "Boss, I was about to report to you, we contacted a machine tool and equipment factory in Germany, although the scale of this factory is not large, but it has a history of more than 100 years, belongs to a century-old factory, and they also happen to produce the kind of large-scale gantry CNC milling machine we need." ”

Li Tianfeng said: "This is good news, then without further ado, send someone to Germany immediately, and if you can, you can even sign an order contract with the other party immediately." ”

Zeng Qinghai said: "Boss, I'll arrange it now." ”

Li Tianfeng and Zeng Qinghai explained some details, and Zeng Qinghai wrote them down one by one.

Soon, with Zeng Qinghai's phone call, a technical team composed of three people immediately went to Germany.

For German machine tools, Li Tianfeng has always had a good impression, over the years, Tianfeng Technology Company has purchased a lot of German equipment, these German equipment, are first-class quality, precision has nothing to say.

…………

Today's three watches, the first one is sent! (To be continued......)