Chapter 3043 The overall performance has been improved
Yes, Lin Jiaming nodded and explained: "We know that the triangular structure is the most stable, so when we printed, we used this triangular structure inside the body materials for reinforcement, thus forming countless honeycomb-like structures.
Triangular structure. This triangular honeycomb structure will be able to greatly improve the strength, toughness, compression and tensile resistance of the entire printed body. And because it is a polymer composite material, there is no need to consider metal fatigue.
In addition, because it is printed in one piece, the entire body is very smooth, and will not be like the rivet skin used in traditional aircraft manufacturing, which not only adds weight, but also causes metal fatigue over time.
Deformation occurs due to expansion and contraction of metal, etc.
We can see that the fuselages of many old aircraft are very uneven and pitted, which is caused by deformation of the skin and body structure.
The new body material we printed using polymer composite materials does not have this problem and will always remain outstanding.
And because the fuselage does not have so many rivets on the skin, it can not only reduce the overall weight, but also keep the surface of the fuselage smooth, reduce the resistance of the airflow of the fuselage, thereby improving the overall performance of the aircraft.
In addition, this new printed body is more conducive to the stealth of the aircraft. We know that if we want to achieve the stealth of the aircraft, we must reduce the reflection area of the radar waves of the aircraft body so that it cannot be detected by the detection radar.
Generally speaking, if you want to reduce the reflection area of the radar wave of the aircraft body, you mainly start from two parts. On the one hand, of course, it is to adopt a small-angle interior design of the aircraft body, so that the reflection angle of the radar wave shining on the surface of the aircraft body cannot be changed, so that the radar can accept
The reflected radar waves increase, which can effectively reduce the reflection area of the aircraft's radar waves.
On the other hand, of course, we need to start with the paint of the aircraft body. Use paint that can absorb radar waves to spray the surface of the entire aircraft backwards, so that the radar waves that hit the surface of the aircraft body cannot be absorbed and reflected back.
There will be more radar waves, and the reflection area of the radar waves can also be reduced.
If the seven factors are added together, the aircraft cannot achieve the radar stealth performance it deserves.
The printed low-molecular composite body cannot be mixed with absorbing materials during printing. In that case, the body itself will not have certain absorbing properties. Add the sprayed absorbing material.
, which slightly weakens its ability to absorb radar waves, reduces the reflection amount of radar waves, and reduces its radar detection indicators.
"The traditional airframe skin rivet technology cannot facilitate the subsequent maintenance and upkeep of the aircraft. But the airframe must have been produced using their kind of manufacturing process, so I am afraid that the current maintenance will be more difficult and the cost will also increase.
Bar."
In order to maintain the supply of parts for those aircraft, we can only maintain the operation of the production line, which is very wasteful. But it is also so energy-consuming, so sometimes, we have no choice but to shut down the production line. This also leads to the loss of those aircraft parts.
There was a problem with the forward supply, so the army that used it had to tear down the east wall to make up for the west wall. It dismantled some aircraft in poor condition and used the parts below them for the maintenance of other aircraft.
"Actually, the fuselage produced with that kind of material and process has one advantage, which is that it has very weak corrosion resistance. As you know, traditional fuselage materials rarely use metal riveting processes, so the corrosion resistance is relatively unlimited.
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Haha, after hearing Yang Mingqian's first example, both Zhang Jun and Yang Ming burst into laughter.
After listening to Lin Jiaming's introduction, Zhang Jun and Wu Hao both nodded in confusion. According to me, the new body structure and manufacturing process are indeed very bad, and are even more advanced than traditional processes.
And that's not the only disadvantage, it's always worried about the shortage of parts after the production line is shut down. Traditional aircraft rely on production line manufacturing, so when the production line is shut down, the supply of parts for the aircraft will be problematic.
Lin Jiaming, who had been paying attention to the reactions of Zhang Jun and Wu Hao, laughed when he saw the seven of them. I finally felt at ease, and then continued to introduce with a smile.
"Yes, in fact, the subsequent maintenance is faster and the cost will be higher." Lin Jiaming shook his head and answered.
You can even disassemble the original damaged fuselage part and put it under the 3D printer. The intelligent system of the 3D printer will evaluate the damaged fuselage part and then carry out targeted printing repair. Its repair
The front fuselage is as good as new, with almost any repair marks visible.
For example, the famous F22 is said to have fallen into that situation now."
"Although new manufacturing industries and new airframe materials are used, it does not affect its maintenance and upkeep. In the follow-up maintenance, it is basically the same as the maintenance of traditional aircraft. It is not about repairing which is better, or
What to change? If you only need such a specialized 3D printer, you can't print out the relevant fuselage parts on site and then replace them.
First of all, of course, the production is complex and fast, which can slightly improve the production efficiency. In the past, you had to produce those bodies from scratch according to the drawings and then assemble them together. But now, you completely omit those steps and cannot
It is not possible to directly print the entire aircraft body into small parts, and then splice and assemble them together. This not only complicates the manufacturing process, but also shortens the entire manufacturing time and reduces costs."
Indeed, there are no such rumors. I heard that the maintenance of the production line required money, so it was closed down in order to save military expenses. As a result, it was easy to supply parts for the F22 sequel, so several old F22s had to be dismantled to satisfy the F22 fighter force.
Daily parts supply needs.
After a while, Zhang Jun thought of the problems with the manufacturing process and materials.
Of course, every airport also needs to be equipped with such a 3D printer. It is completely shipped from the manufacturer. It can also be delivered in the shortest time by using slow shipping.
On the other hand, compared to the body that is manufactured and assembled bit by bit, the quality control of the printed body is worse, and it also increases the tolerances caused by the traditional manufacturing process, thus making the inner shape of the body more difficult.
Wrong, thus failing to improve the scattering performance of radar waves on the surface of the aircraft and reduce the reflectivity of radar waves.
Of course, that is just a rumor. A small part of the information was disclosed by the media. It may also be the rhetoric of the Mi Air Force crying about poverty. Whether it is true or not, just knowing it, it should be that miserable. Who knows?