Master Zhou, the squad leader of the assembly class, saw that the assembly of the intermediary casing had reached the request, and immediately said: "Xiao Wang, you are responsible for tightening the screws, Lao Chen, you are responsible for installing the bearings." ”

Xiao Wang answered, took the torque wrench that had adjusted the torque, and tightened the screws in place one by one according to the tightening order to achieve the specified torque request.

For aero engine assembly, most of the screws have tightening torque requirements, which are clearly stipulated in the process manual of Yonghan Aviation Power Technology Co., Ltd., which must be strictly implemented, and the screw tightening sequence is also strictly requested.

After tightening the 22 evenly distributed screws and nuts, Xiao Wang will bend the lock plate and lock it again to prevent the nut from loosening and failing in the future.

This process is also filmed by the technical staff of the technical part of the technical staff holding a digital camera from all angles of each assembly step, and these assembly processes are stored in the archival material library.

Yang Jie and others stayed in the assembly workshop for most of the day, and saw that the assembly process was relatively smooth, so they returned to their office satisfied.

"Yang Shao, today we received a fax from Liming Engine Company, and the other party wants to entrust us to process a large integral blade disc. ”

Wang Yonglin said.

Since Mr. Liu spoke, during this period of time, the four major domestic OEMs have successively entrusted OEM orders for flame cylinders to Yonghan Aviation Power Technology Co., Ltd., and now it seems that they also want to hand over some difficult large-scale parts to Yonghan to complete.

Yang Jie then understood that this time the Dawn Engine Company wanted Yonghan to help process a large part with a diameter of nearly one meter, which should be the integral blade disc of a certain type of military engine, and it should also be a large integral fan disc, which should be used for design or process verification.

The processing of the integral blade disc is the high-precision milling of the blade, which is a difficult process skill, which not only requires high-precision five-axis linkage, or even a large-scale CNC machining center with six-axis linkage, but also needs to have excellent technological strength.

There is exactly one such large-scale machining center Yonghan Aviation Power Technology Co., Ltd., and there are only three in the hands of all Huaxing group companies.

Because it is too complex and expensive, the output of this large machining center is extremely low, just a few days ago, the military also visited the machine tool research institute, and ordered five high-precision six-axis large machining centers from the machine tool research institute, each of which costs tens of millions, but the delivery has to be delivered at the end of the year.

"There should be few companies that can process such blade discs in China, even if it is the dawn engine company, their technological strength may be able to achieve, but they do not have such a large high-precision five-axis linkage machining center. ”

Wang Yonglin said.

"What's their offer?" Yang Jie asked with a smile.

"350,000. Wang Yonglin said.

"Are we sure we can complete this OEM task?"

"It's not a big problem. Wang Yonglin said with a smile, but he didn't say anything full.

"Then take this order. Yang Jie smiled and nodded: "Our task of producing engines by ourselves in recent years will not be too heavy, and it is also very good to multi-OEM some domestic and foreign aero engine parts and more tempering." ”

Wang Yonglin also smiled, at the beginning, Yonghan Aviation Power Technology Company had no intention of entering the OEM field, but now that the business has come to the door, it is natural to take it.

"Yang Shao, after the design of our engine is finalized, I think we can also supply core components to these domestic aviation companies. ”

Wang Yonglin said.

Well, you can arrange these things. Yang Jie nodded.

He paused and said: "Now the turbofan 10 engine prototype of the Dawn Company is about to make its first flight, and the progress is faster than ours, and they have applied for a heavy fighter imported from Russia and a single-engine light fighter independently designed in China as a test flight platform, and the conditions are better than ours. Pratt & Whitney is such a heavyweight opponent, so our strategy must be maneuverable, and we must have a faster response to changes in the market on the basis of thorough control of the core machine. ”

"The core machine skills of the Dawn Engine Company come from the F100 engine, and now it is finally designed, it is difficult to say that it is not reliable enough, we can cooperate with them better, but we can enter the supply customers of the two main fighters in China faster. ”

Yang Jie paused and said: "Now the domestic large aircraft project is estimated to be a long time will not be approved, we are still focusing on the research and development of large bypass ratio turbofan engines, and important energy is focused on small and medium-sized bypass ratio turbofan engines. ”

Wang Yonglin nodded thoughtfully.

Civilian turbofan engines face complex and demanding requests, some of which may arise after thousands of flights, and engineering is not the most important challenge, but after-sales service and intellectual property governance are the biggest tests.

All domestic and foreign customers expect high efficiency and safety, and even after developing a large bypass ratio turbofan engine, Yonghan must obtain an airworthiness certificate issued by the FAA/EASA before entering the global aviation market.

Obtaining type certificates from the FAA and EASA is a very difficult field to enter and gain a foothold, and there are many extremely complex but effective airworthiness standards that need to be met, not for any one company, but for all aviation giants.

These demanding airworthiness standards limit the entry of new aircraft engine manufacturers into the civilian market, which is why it is difficult to sell aircraft with Russian-made aircraft to most airlines around the world, while it is very profitable to sell aircraft to the North American, European and Japanese markets.

Even those engine certification developed by those aviation giants with very mature skills spanned as long as 7 years, and involved a large number of experimental tests.

The FAA's coherence inspection manual, which is thousands of pages, is used to ensure that changes in engine engineering are tracked and that any changes must be authorized. As for how to control quality, how to submit documentation and how to deal with it, the requirements include an English document detailing how to record the number of different engine types.

Every part such as screws, bolts, rivets, etc., must obtain a certificate of conformity, and it may also be necessary to write design and certificate related documents for new screws and other parts.

Even if Yonghan spent so much effort to obtain the airworthiness certification of the engine, it is very likely to face the dilemma of not having a flight platform to carry -

In the U.S. Navy, there are only a few aircraft manufacturers on the Blue Star, and they are all Western countries, and these countries will not use Yonghan's engines in order to cover their aviation industry, unless they are carried on their own domestic large aircraft.

Yang Jie nodded and said: "Yonghan company can now design a high-thrust turbofan engine with afterburner, the target is set at 8000 kg of thrust, I look forward to seeing that it can be designed and finalized in a few years, replacing the RD-93 engine imported from Russia by the military and the Spey engine imported from the United Kingdom before, the military is now in great demand for this model, and it is not a problem to sell hundreds of units every year." ”

Wang Yonglin knew that his boss had a very close relationship with the military, and it was not a problem for him to join the military and get so many orders.

"Another 1000 kg class small turbofan engine can be designed, it is best to use a cheap single-rotor turbofan engine, my goal is to supply the military with engines for cruise missile applications, this is a consumable, and the order volume will not be small. ”

Yang Jie looked at Wang Yonglin and said: "Now Huaxing Group Company has obtained the qualification to enter the military market, and the military has also approved us to start developing drone projects, and now this 3000 kg thrust turbofan engine just comes in handy." ”

"Yang Shao, then our UAV platform can benchmark with the unmanned performance of the American Global Hawk!" Wang Yonglin said in surprise.

"The Global Hawk plan was launched in '95, the first flight was completed in '98, and in previous years it was arranged in the US Air Force, and this year it was the first transoceanic flight from the United States to Australia, and we can't lag too far behind. ”

"As long as we mature in drone technology, very useful, this market prospect is very large, our goal is to reduce the cost of drones and application costs as much as possible, it will take less than ten years to form a big emerging industry." ”

Yang Jie smiled and said, "This is what I want to do." ”

Reborn University Bully Latest Chapter 512 Drone Project Person!Website: