Chapter 555

Zhuang Jianye saw this scene really unable to Tucao, Liu pure old man's mouth was opened or still been poisoned milk to kiss, this just came for how long, let Professor Zhao make complaints about two times.

That's the person who has just taken Suxiao Jiuxin Pill. If Liu Chun says something about it again, there will be a big mess.

So, before Professor Zhao's tone changed, Zhuang Jianye rushed forward and pushed Liu Chun away. He stroked the old man's back with his hand and comforted him: "don't think about it, Professor Zhao. Our laser welding equipment is not mature yet. At most, we can weld small parts such as bearings..."

Zhuang Jianye wants to continue to explain, but he raises Professor Zhao's arm in front of him and stops him from saying: "I'm ok, I'm ok, I can carry it, I can carry it ~ ~"

I can carry it, from ej9 e-book welding machine to silicon nitride bearing, and now to laser welding machine, even if Professor Zhao's old heart is fragile Now I'm a little numb, so I unscrewed my thermos cup and drank two mouthfuls of warm water. Then I breathed a sigh of relief: "laser welding machine, laser welding process It's a good thing. It's a good thing... "

Then he picked up the ring outside the bearing, looked at it carefully for several times, tut tut praised: "even the weld can't be found, if it's not clear, how can we know that it's actually two pieces of low carbon steel welded together?"

Then he handed the ring in his hand to Tong Xia: "you see, this is the cutting-edge welding technology..." As soon as the words came to an end, Professor Zhao sneered: "the French think that the aluminum honeycomb composite on their" dolphin "helicopter is world-class and unparalleled in the world. In the transfer, the lion opened his mouth and refused to give us the relevant technology. Later, we conquered it and blocked the bonding process of our modified materials, which made us very passive.

Now, we have laser welding technology, which can directly weld the aluminum honeycomb from the inside to the outside as a whole. Its technological performance is safer and more convenient than the French chemically synthesized adhesive. What's more, the overall structure is still very firm. At that time, we will see what the French have to curse. "

Professor Zhao's words are more said more happy, one side of Tong Xia is also frequently nodded, look like you know in this respect was the French toss is not light.

But there's no way. Who can make China have no advanced bonding technology for aluminum honeycomb composite? Maybe someone asked that the R & D center of Tengfei aviation technology is not very strong in this aspect, so it should be able to do it.

The problem is that although Tengfei aerospace technology R & D center is very strong in aerospace advanced materials, it mainly focuses on carbon fiber materials and their derivatives, and metal materials are actually very general.

Aluminum honeycomb composite is called composite material, but in fact the main material is still metal, just two aluminum plates with a thin layer of aluminum honeycomb structure in the middle, so as to enhance the structural strength of the plate.

In this respect, Tengfei aviation technology R & D center can only be said to be general, and naturally there is no unique bonding process. If it is replaced with aramid paper honeycomb structure, it is another matter.

Developed countries export technology more for cutting leeks and shearing wool. It costs US $1000 to open the mouth of a screw. It's very normal to operate skillfully and normally, and to kill domestic "dolphin" helicopter imitation factories in terms of bonding technology.

Professor Zhao also knows this truth, but he feels very suffocated. Now, Tengfei group has laser welding machine. We should know that this kind of precision welding process can control the minimum welding point at about 1 micron. The aluminum honeycomb structure in aluminum honeycomb composite material is not as thin as 1 micron, so it can be welded by laser welding process.

The effect is self-evident, which not only simplifies the production process, improves the efficiency, but also reduces the pollution caused by chemical binder, making the manufacturing process more environmentally friendly.

Of course, more importantly, the use of laser welding process can reduce the weight of the structure, which is a great advantage for any kind of aircraft.

Because of this, after learning that Tengfei group has laser welding machine, Professor Zhao was very happy. He handed the bearing ring to Tong Xia and carefully understood the welding seam. Professor Zhao turned his head to look at Zhuang Jianye with a smile: "Xiaozhuang, is your laser welding machine imported from the United States?"

"We want to buy it, but the Americans don't sell it. They have to do it by themselves." Before Zhuang Jianye answered, Liu Chun stepped in first.

"The laser welding machine was developed by you?" Professor Zhao changed his tune again. Zhuang Jianye felt a thump in his heart and touched Liu Chun with his feet to let the old man stop irritating him. However, he didn't want Liu Chun's old feet to touch him twice.

Zhuang Jianye was surprised and looked down. He saw Liu Chun blink at him, as if to say, don't worry, I have a sense of propriety about the old man.

Zhuang Jianye, who wanted to stop him, immediately shut up and listened to Liu Chun continue: "of course, we have cooperated with North China Institute of optics to develop a 600W CO2 laser. On this basis, we have developed our own laser welding machine and accumulated a lot of welding data. The next step is to develop a 1000W CO2 laser, which will be used once it is successful On the d-30-z series turboshaft engine that we have just finished the initial test run.... ""Wait..." Liu Chun wanted to go on, but he was stopped by Professor Zhao: "has the initial test run of d-30-z series turboshaft engine been completed?"

Liu Chun nodded: "last month, we also reported to the light helicopter development project team. They just sent someone to look around and fill in a report and then left. There's no way. Who let us be? The d-30-z series turboshaft engine is the backup power system. There are no other people's turboshafts, eight red Miao Zheng, just like our aramid paper honeycomb structure composite It's obviously a generation ahead of the French aluminum honeycomb, but the light helicopter development project team can't see it.

Brother Zhao, you don't know how many sins and sufferings we have suffered over the years. They all say that there is a thousand mile horse often, but Bole doesn't often. We just have no bole. My grandfather doesn't hurt me and my uncle doesn't love me. What's the use of making good things? Isn't that where it stinks? But it doesn't matter whether they are young or young. Those of us who have been here look sad ~ ~ "

what Liu Chun said is that his voice and action are both strong, and his old face is white and fat. It's the same as when a family of seven or eight people crowded in a small room with more than ten square meters in Yonghong factory. They can move God with great bitterness and deep hatred.

Professor Zhao was shocked at first. He didn't expect that Tengfei group had so many good things on hand, but he was infuriated by Liu Chun's words at the next moment. When he saw bullies, he didn't see such bullies. He immediately patted his thigh: "others don't need it. I use it. Xiao Tong and Xiao Wu will draft a report when they go back in the evening and formally report our helicopter project."