Xie Zhenhua is happy in his heart!

The production and manufacturing of the subway is considered to be a missed opportunity, and it is basically impossible for the Red Star Factory to produce and manufacture subway locomotives, but soon, they can participate in the production and manufacture of EMUs, which can be regarded as a peak and a loop.

Jiuzhou Industrial Group has completed the design of many important parts and components, and can start the trial production of some parts, which is what he dreamed of.

Throughout the night, Xie Zhenhua almost lost sleep.

Early in the morning of the first day, he arrived at Jiuzhou Industrial Group with great interest, knocked on the door and walked into Tang Fei's office.

Yesterday afternoon, Tang Fei has basically prepared everything, those parts can start trial production first, has made a list, sorted out the relevant process information, and then, can be manufactured according to these process materials.

"Lao Xie, come so early!"

Xie Zhenhua was in a good mood and smiled, "Brother, I was so excited that I almost didn't fall asleep last night, no, come over early and have a look." ”

Which parts have been produced and designed, and which will be handed over to the Red Star Factory for trial production, Xie Zhenhua now wants to know.

In addition, although the introduction information of the JF200A EMU is very detailed, Xie Zhenhua wants to know more about the specific key and core technologies of the JF200A EMU, and he wants to know in further detail.

In the introduction of the information, only a little mention of these things, more specific and in-depth understanding, obviously through the design data, or process data.

Seeing Xie Zhenhua's impatient appearance, Tang Fei also smiled loudly, "Old Xie, some of the most critical parts of the EMU have been designed and detailed process and technical data have been formed. ”

Before the construction of the Hexi plant was completed, which parts were handed over to the Red Star Factory for trial production, which ones would be produced and manufactured by Jiuzhou Industrial Group, and which ones would be purchased from outside suppliers, Tang Fei had actually basically thought about it, and the technical team headed by Wu Jingan also set these things.

Generally speaking, the EMU mainly contains several main parts, such as the car body, bogie, traction transmission control system, control device, and car end connection device.

Among them, the car body, bogie and car end connection device, the key important parts are handed over to the Red Star Factory for manufacturing, and the ordinary and general spare parts are purchased from the outside, or handed over to the surrounding suppliers for processing, which is manufactured by them, and finally assembled in the Red Star Factory.

The core of the EMU is the two parts of "traction transmission control system" and "control device", which involve the most key and core technologies, and these two parts are temporarily trial-produced by Jiuzhou Industrial Group.

After the construction of Jiufang EMU is completed and the EMU production and manufacturing capacity is obtained, all these things will be handed over to Jiufang EMU and all will be produced and manufactured in Jiufang EMU Company.

"The list has been sorted out, and the process data has been prepared!"

Xie Zhenhua was surprised and amazed at the high efficiency of Jiuzhou Industrial Group. He also hurriedly said: "Brother, quickly show me what things are produced by us." ”

Tang Fei smiled, opened the drawer of his desk, and took out a list of parts from it, as well as a USB flash drive, "Lao Xie, this is the list of parts you are responsible for trial production, and the USB flash drive contains detailed process and technical information, and you are mainly responsible for the trial production of the car body, bogie and car end connection device." ”

"Okay, good, great!" Taking the list and USB flash drive, Xie Zhenhua's face was full of joy.

Tang Fei reminded: "Among them, the traction transmission control system and control device are responsible for the trial production by us, and after the trial production of these important parts is completed, all the vehicles will be assembled in your factory." ”

This was negotiated at the beginning, before the construction of the Hexi plant was completed, the first EMU was assembled at the Hongxing Plant, and the car was disembarked.

Xie Zhenhua said: "Okay, there is no problem. ”

At this time, Tang Fei felt that it was necessary to remind him about the next trial production of the car body, bogie and car end connection device.

Especially the body!

The role of the car body is to install the foundation and carry the skeleton. EMUs generally adopt a steel structure or light metal structure with integral load to meet the strength and stiffness requirements under the lightest dead weight.

Tang Fei reminded: "Lao Xie, the body of the JF200A EMU is not simple, it is definitely the best designed and most advanced EMU in the world, it adopts advanced body lightweight technology, which greatly reduces the overall weight of the EMU. ”

Xie Zhenhua has seen the introduction of the JF200A EMU before, which mentions the lightweight technology of the car body, but it is just an introduction, and very specific things are not involved.

Seeing Tang Fei say this, Xie Zhenhua wanted to further understand where the lightweight technology of the JF200A EMU was advanced.

Tang Fei smiled proudly and began to introduce the body lightweight technology of the JF200A EMU to Xie Zhenhua in more detail.

"Lao Xie, the body of our EMU, in addition to the structural design is very advanced, the use of materials is also very particular, a large number of aluminum alloy, composite non-metallic materials and other lightweight materials, the weight of the car body is reduced by more than half compared with the traditional passenger car, compared with the international advanced EMUs, the weight of the car body is also lighter by one-third......"

After listening, Xie Zhenhua was a little moved, and exclaimed in his heart, this technology is really good!

On the premise of fully meeting the strength requirements, such a light body has a bit of an anti-natural taste.

One of the most important technologies for high-speed trains is to reduce weight.

When the train is running, it consumes about 12 kilowatts per tonne of weight towed, and about 16 to 17 kilowatts per tonne of weight when it travels to 300 kilometers.

The lighter the weight, the more energy-efficient it is, and the faster it can go. The world's motor car manufacturing enterprises, has been competing, as much as possible to reduce the weight of the car body, undoubtedly, JF200A EMU in this technology, all of a sudden to the forefront.

Xie Zhenhua gave a thumbs up a little excitedly, "Brother, I didn't expect the lightweight technology of our JF200A EMU to be so powerful, don't worry, we will produce the car body excellently." ”

Whether the Red Star Factory can smoothly manufacture the car body, bogie and other things, Tang Fei is not worried at all.

Hongxing factory has thousands of employees and decades of history, and is an old factory that has accumulated rich experience in production and manufacturing. In addition, the process data in the USB flash drive comes from the system, which is very detailed, as long as the production is carried out in accordance with these process data, there is absolutely no problem.

In addition, these parts of the EMU produced by the Red Star Factory must also enjoy the BUFF effect of their own quality +2, and they will definitely be able to produce these things smoothly and with high quality.

Now, Xie Zhenhua wants to go back immediately, immediately hold a meeting, arrange the trial production of these parts, and start the production and manufacturing of parts in full swing.

But Tang Fei didn't let Xie Zhenhua go immediately, but said: "Old Xie, don't worry, in addition to the lightweight design technology of the car body, what are the core key technologies of our JF200A EMU, do you know?"

Core key technology!

Xie Zhenhua, who originally wanted to leave, suddenly became interested, and said with a smile: "As mentioned in the introduction materials, there are a total of ten core key technologies for JF200A EMUs, but I don't know the specific situation. ”

Although the introduction materials are very detailed, in order not to involve technical leaks, only these ten core key technologies are briefly introduced, and the specific and in-depth things are not mentioned.

Now that he is ready to start the trial production of some parts, Tang Fei feels that it is necessary to introduce these ten core key technologies to Xie Zhenhua, so that he can have a more comprehensive understanding of the technical advantages of the JF200A EMU.

The lightweight technology of the car body is one of them, and there are nine other core key technologies, Tang Fei patiently introduced them to Xie Zhenhua one by one, they are "integrated technology", "traction technology", "AC transmission technology", "braking technology", "operation control technology" and so on.

The biggest highlights are "operation control technology" and "braking technology".

The operation control system, which is the core to ensure the safety of operation, is completely different from the driver-based control system of ordinary trains, which is similar to the full digital control of the subway system, the control center plays a central role, and the driver is only used as an auxiliary controller when the network is disconnected or faulty.

The braking technology of the JF200A EMU is also not simple.

As we all know, the braking technology of high-speed trains is related to driving safety. The braking technology of JF200A EMU is very advanced, from 200 kilometers per hour to 90 kilometers per hour, it uses the reverse rotation of the motor completely, and uses the huge inertia of the EMU to generate electric energy to transmit electricity, without any mechanical friction in this process, which is a very green technology.

At that time, the speed dropped below 90 km/h, and then mechanical braking was used. The braking distance of the JF200A EMU is less than 1500 meters, which is completely the world's top level.

After listening to Tang Fei's general introduction of the ten core key technologies of the JF200A EMU, Xie Zhenhua stood up as if he had been beaten with chicken blood.

Put away this USB flash drive, take the list of trial parts, and say excitedly: "Brother, it's not too early, I want to go back immediately, hold a meeting immediately, and arrange the trial production work as soon as possible." ”

Tang Fei could fully understand Xie Zhenhua's mood at the moment, and he didn't hold back, got up and sent him to the door of the office, and watched Xie Zhenhua leave, then turned around and returned to his office, picked up the phone, and ordered loudly: "Hailong, notify the relevant personnel, and start a meeting immediately!"

Obviously, the trial production of the "traction transmission control system" and "control device" of the JF200A EMU is ready to be started by Tang Fei.

……

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