"In front of this is the assembly area of ​​the four-axis machining center, which is mainly used to process some structural parts of high-precision aerospace products. On the basis of the three coordinates, a four-rotation axis rotating around the x-axis is added. The next step is the fifth axis that swings the z-axis..." There is a very big difference between the four-axis machining center and the three-axis machining center.

The main reason is that the four-axis machining center has an additional workbench that allows the machined parts to rotate. In fact, this is also a simple four-axis machining center.

A true four-axis machining center is also an absolute strategic material in China. Its production difficulties are far higher than that in foreign countries. This has a great impact on the accuracy of parts in aerospace and advanced precision manufacturing. For example, an ordinary three-axis machining center can only process one surface of the part, that is, the one perpendicular to the spindle. However, after the four-axis machining center is installed, due to the existence of a rotary workbench, the parts can be completely rotated to process another surface after one surface is completed, or rotated to process the opposite side of the processed surface by 180 degrees.

In this way, it can effectively ensure that most of the processing of the armor can be completed in one go and the spatial position accuracy of the parts can be ensured.

In the aerospace industry, since many parts require very precise space locations, ordinary processing methods cannot be effectively guaranteed. Even if the master relies on his feelings and experience, with the assistance of various top-level testing equipment, he cannot be as precise as a machine.

The reason why missiles, spacecraft, and top fighter jets are difficult to produce and have high manufacturing costs is because they have too high requirements for the entire cutting-edge manufacturing field when manufacturing.

Some things cannot be processed by masters with skills and experience.

Especially some super-precision and super-complex structural parts of the opposite sex structure!

Because Liu Yijiu's republic could not develop in this regard, the technology development in the aerospace field was very slow for a long time.

If we learn the Soviet model, the manufacturing cost would be three to four times or even more expensive than those made with CNC machine tools. Otherwise, the US would not have been able to drag down the Soviet Union with just one space war plan.

"This is a simple four-axis. On the fourth axis, don't you have a complete technical form?" Karloff knew these devices very clearly.

The achievements made by China in CNC machine tools really shocked them deeply.

This is absolutely impossible to be copied after the United States gave China dozens of CNC machine tools to be disassembled by the Chinese in the past few years.

Even the four large industrial mother machines exported to the Soviet Union by Japan were not so advanced in terms of precision - because the four CNC machine tools were processed using the paper tape drilling programming that had been gradually eliminated!

"It is indeed a simple fourth axis. Since our control software cannot keep up. Although we only added a fourth axis, the complexity of the entire control software has increased by at least five times. At present, such CNC machine tools are needed for aerospace and even ordinary weapons and equipment manufacturing. Moreover, our domestic economy is not good and the country has no money. So we must save costs. If you need it, we can provide you with a complete form of a four-axis machining center..." Liu Yijiu did not think that the things here were a bit simple for the Soviets.

The control system is the key.

This is the fourth axis formed by the slewing shaft controlled by the PMC module. The system required is to allow the simple rotating workbench to rotate according to the needs of the program during the other three axes. It even encounters four-axis four-axis linkage, that is, the three axes are displaced and the fourth axis needs to rotate at the same time. Usually, four-axis three-axis linkages.

The requirements for processing procedures and control methods are much simpler.

"There is no way to process heavy-duty parts! Liu, what we need is the fourth axis that can process heavy-duty parts. If there is such a thing, I think the transaction between us will become easier!" Karov said to Liu Yijiu.

This simple four-axis machining center can only be used to make some small and complex parts, and it is impossible to process high-precision large-scale special-shaped parts.

Especially when processing some relatively large parts, the existence of a simple workbench will effectively occupy the processing area and narrow the size range of the processing parts.

The CNC machine tools bought by the Soviets in Japan are special CNC machine tools for processing large ship propellers. Each blade has a processing shaft. In this way, processing several blades at the same time will keep the processing size consistent and the deformation will be much smaller. It is not a general type.

"No problem, we can offer you, but the price is at least two million dollars per unit!"

Back then, in his own era, the Republic took advantage of the push of the Berlin Wall in Europe to ignore China and imported several four-axis machining centers from the Federal Republic of Germany, each of which was two million US dollars!

That was the first time in China to buy advanced multi-axis linkage CNC machine tools.

It is precisely because of the four-axis-linked CNC machine tools that the Republic's intercontinental missile research progress has been very fast, and even promoted the birth of the J-10 fighter jet and the early service of the J-10.

Now it is sold to the Soviet Union. Even if the US dollar in the 1980s is more valuable than the one in the 1990s, it is very authentic.

Who said that the Soviets didn’t have it?

Who told the Soviets that they needed it urgently?

“Is this price too high?”

"It's not high, you can look at the samples first and then look at the processing strength." Liu Yijiu was not worried at all that the Soviets thought it was expensive.

Even if he asks for these things in a huge price like the Japanese, it is not a problem.

The Russians have very bad habits, that is, they are outrageously bargaining. When the offer is made, they often only bargain between 10% and 20%, and finally they can trade at 50%, which will make those who do business with them laugh.

Liu Yijiu was too lazy to slowly grasp the price with them.

Let them see the processing status of the four-axis machining center first, and then negotiate with them the price.

We rely on technology to speak!

"You have it here?"

"No, in our Hongfeng Machinery Factory." Liu Yijiu shook his head.

This is only used to produce CNC machine tools.

The key core components of CNC machine tools are produced in the mountains and then transported to Chengdu by one freight train every day.

Production costs and other things are not a problem for most Chinese companies today. As long as they can produce products that are scarce in the market, they can have huge profits beyond imagination.

Hongfeng Machinery Factory is actually the Rongcheng Air Force Fourth Station Factory distributed to the Jiuyuan.

Originally used to repair fighter jets, it had certain mechanical processing capabilities, mainly producing some vehicles for airport runway maintenance and maintenance of some simple failures of fighter jets, as Taiping Temple Airport was abandoned by the military, it gradually began to decline. After Taiping Temple Airport was transformed into a research area of ​​611 by the Ninth Courtyard, most of the people in that area were relocated, and martial law was imposed on the surrounding area.

According to Liu Yijiu's plan, an aircraft production factory that is about the same size as Factory 132 will be built here, mainly for producing large aircraft and researching things in this area.

After all, the construction and development of Chengdu is still far from the moment, only a small area around Central Tianfu Square.

"Everyone, our confidentiality unit is ahead. I hope everyone will hand over all the equipment and paper and pens that can be recorded on them. Otherwise, it will be unhappy and it will be difficult for us to explain, and it will hurt the harmony..." Liu Yijiu said to everyone on the way to Hongfeng Machinery Factory.

He planned to have dinner in Hongfeng Machinery Factory at noon.

For these customers who gave money, he did not think of them as God.

The staff cafeteria is already very good.

Hongfeng Machinery Factory was originally just a small factory with more than 600 people, and there were only six mechanical workshops, as well as chemical workshops for preparing gases such as oxygen and liquid nitrogen needed at airports.

Now it has been transformed into a processing experiment workshop of 611, which is mainly used to process engines and verify parts and samples of the new generation of fighter jets. Most of the technicians are transferred from the mountain.

Absolute confidentiality unit, and even the entire Rongcheng future development must avoid this area...

The Soviets had no objection to Liu Yijiu's arrangement to eat in the employee cafeteria. The living standards in the Chinese factory were much better than those in the Soviet military factories!

In particular, the units under the Ninth Court have always been domestic benchmarks in terms of welfare.

After dinner, Liu Yijiu refused Du Bin's escort and took a group of Soviets to the precision processing workshop.

He tricked al-31fn from the Soviets and conducted processing experiments here, without any concern that the Soviets knew about it.

"Buzz buzz..." As soon as I pushed open the door of the precision machinery workshop, I heard noisy sounds of mechanical friction from inside. These sounds were far less harsh than rough processing, but they were not the kind of sound that was finalized.

The friction sound of cutting metal materials at high speed of the tool is very huge, especially when processing some difficult-to-process materials, the whole sound can be transmitted far away.

The newly built workshop is as neat as other factories. There are not many equipment in the finishing workshop here, but these equipment is much larger than what you see in Hongshan Machinery Factory.

"There are some high-precision and complex special-shaped parts here, and most of them are experimental samples. The al-31fn samples you gave us are currently being produced here..." Liu Yijiu said straight to the point.

In order to sell CNC machine tools to Russians, he was very hard-working.

Even these confidential things are displayed to the Russians, especially there are many intelligence personnel inside. (To be continued.)
Chapter completed!