CNC machine tools are to improve the machining accuracy, experienced masters, or the technology will be quite superb, but some errors, they can not be eliminated, such as the re-fixation of the workpiece.

The previous manual machine tool, can only process one surface, after the processing is finished, it has to be taken down from the fixture, change a surface, and then process, when it is re-fixed, it will bring systematic error, this error can not be eliminated, if it is a complex shape, then it has to be re-fixed several times, each time it will bring a new error.

The CNC machine tool is different, it can use computer programming to directly control the processing of the workpiece or tool, and the three directions can be started at the same time, so as to avoid the error caused by repeated fixation.

The three directions are easy to understand, up and down, left and right, front and back, in the plane Cartesian coordinate system, it is called XYZ three axes, so it is an ordinary three-axis linkage CNC machine tool.

The principle of this machine tool is not complicated, but the processing is quite a test of the programming level, at least the one in China.

In the Western world, the machine tool is an industrial machine, constantly progressing, up to now, five-axis linkage CNC machine tools, has begun to emerge.

Compared with the previous three axes, it has two more rotary axes, one is that the workbench arranged on the bed can rotate around the X-axis, defined as the A-axis, and in the middle of the workbench, there is also a turntable, which can rotate around the Z-axis, defined as the C-axis.

In this way, through the combination of A-axis and C-axis, more directions of machining are realized, especially the workpiece can be subdivided into arbitrary angles, and inclined surfaces and inclined holes can be processed. Together, these axes can be used to create complex spatial surfaces.

For an engine, if you want to increase the power, you must start from the supercharger, and now your own 59 tank, the supercharger is used, driven by the engine, which will consume power, and the exhaust system of the engine, after the exhaust gas, these energy is wasted, so now in order to improve the power, they have begun to make a fuss from this exhaust system.

Using the exhaust system, one blade is pushed to rotate, and this blade is then driven up by another impeller to drum more air into the intake tract, which can make the engine have higher power, which is exhaust gas turbocharging.

The key to this device is two turbine blades with complex curved shapes, and the other is a high-speed bearing with tens of thousands of revolutions.

Processing such a turbocharged impeller requires advanced CNC machine tools to do it, and if you want to have an advanced high-horsepower tank engine, this is the technology that must be overcome.

Five-axis linkage, can efficiently complete the processing of the impeller, the accuracy is also quite good, in Germany now, is also the most advanced processing equipment, they will never export to their own, can bring back the three-axis linkage, it is already very good.

The two were chatting, when they heard a knock on the door outside, Wang Erzhu went over to open the door, and followed a person who walked in with a smile: "You guys are here, haven't you gone out for a walk?" ”

Turning his head to look at the voice, Qin Zhenhua saw a not very familiar face, Zhang Baolin.

Except for on the plane, the two argued about specific issues, and then there was not much intersection, in the inspection group, Zhang Baolin has always belonged to the role of a silent watcher, not as outstanding as Qin Zhenhua, now, he came to speak, it was definitely purposeful.

Qin Zhenhua greeted with a smile: "Uncle Zhang, come and sit." ”

Zhang Baolin sat next to him and said, "Zhenhua, you are really impressive, no wonder you can be appreciated by Commander Huang and Minister Zhu." ”

"Where, I'm just a stunned young man." Qin Zhenhua said: "On the way here, I made a joke, almost making people think of it as a thief. ”

Speaking of this, Qin Zhenhua also smiled helplessly, this is a big mess, even if you don't say it this time, if there is an inspection group in the future, someone will definitely take yourself as an example: when you go abroad, you must maintain a certain etiquette and demeanor, don't look at other people's heavy trucks in the service area like a machine factory, so that people think they are thieves.

Speaking of this, Zhang Baolin also smiled, and then shifted the topic to the engine: "It was just an accident, no one dares to deny your credit, if it weren't for you, we wouldn't be able to get a prototype of a 1200 horsepower engine so easily." ”

The British have promised to give them a prototype, which will bring great help to everyone's research and development, broaden their horizons, and provide ideas.

Although on the plane that came, the two had a dispute because of different concepts, but now, Zhang Baolin is still quite satisfied with the additional gains of this trip to the UK, one more engine, one more research object, and he is already looking forward to disassembling this engine for research.

Hearing Zhang Baolin's words, Qin Zhenhua shook his head again: "Uncle Zhang, this kind of thing, there is no one in the eight characters, when the thing is in hand, it is not too late for us to be happy." ”

Qin Zhenhua sighed again: "We still have to be mentally prepared." ”

Zhang Baolin's face changed suddenly: "Do they still want to deny it?" ”

Qin Zhenhua smiled helplessly: "I hope I'm too worried, you can also see that they are guarding against us, mainly because they want to make money from us, and it is not so easy to obtain their advanced military technology." ”

Zhang Baolin also sighed: "Yes, so, tomorrow I went to the MTU company, we mainly inspect their civilian diesel engines, let's take the civilian road, it must be no problem, what do you say, Zhenhua?" ”

Qin Zhenhua reacted at this time, he was afraid that he would be like in the UK, out of the moth, he was looking forward to buying the engine of the Leopard 1 tank, although the power is not particularly strong, after all, it is a direct military version, but Zhang Baolin is looking forward to one step, if you can't buy a military one, you will buy the corresponding civilian version of the engine, the two have different opinions, tomorrow, will there be a problem?

What to import is not something that Qin Zhenhua can decide, he is just a suggestion, after all, he is a small person, and his opinion is just for reference.

Now, in the face of Zhang Baolin's question, Qin Zhenhua skillfully avoided the topic: "This, or the leader has the final say, by the way, Uncle Zhang, the newly researched engine in your factory should be turbocharged, right?" ”

On the plane, I have heard of their 730 horsepower engine, although the power is not very strong, but it is used in the second generation of tanks, it can be regarded as improvised, and now Qin Zhenhua mainly considers the matter of the second generation tank, and the others are secondary.

Zhang Baolin nodded: "That's nature." ”

"What is the biggest technical problem in R&D?" Qin Zhenhua asked: "Is it the processing of turbochargers?" ”

This one... Zhang Baolin scratched his head: "The biggest problem we encountered was the burst cylinder head. ”