Chapter 184

Seeing the eager eyes of the people on his body, Yun Fei was elated.

Although you have been engaged in research, theory and research for decades, I, who is only a bachelor, certainly can't compare with you, but in terms of knowledge, especially in the machine tool industry, it is estimated that in this era, there will be few people in the world who have more long-term knowledge than myself.

What I want you to do now is to let you first get out the fourth axis controlled by this simple PMC drive module, use this simple four-axis machining center to produce some small parts, accumulate some experience in the design and control of the fourth axis, and reserve some technology and experience for officially entering the equipment production of the NC machining center in the future, It's not for you to build a house.

I'm kidding. Even the three-axis machining center can't be produced. Do you want to build a turn milling compound machining center more difficult than the five axis machining center? Don't you have to go against the sky? Yun Fei thought so proudly.

When others looked at him, his eyes began to become sour and astringent, Yun Fei scanned the faces of the people, coughed, cleared his throat and said to the people.

"Do you think these ordinary small lathes produced by the company can be called heavy equipment? Since the company is called Jiuyi heavy industry, it will certainly produce heavy cutting machine tools and equipment in the future. Therefore, the production experience of these large rotary worktables must be reserved from now on. " Yunfei's words made Sun Lin and situ Heyun take back their impulse to beat people, and made other guys who were at least one round older than him take back their eyes to eat meat.

This boy, although he is young, is very appetizing.

"Xiao Yun, although such a rotary table will be more useful to you in the future, the scope of use of heavy machinery in China is too narrow..." Sun Lin looked worried.

Yun Fei has become a businessman now. Businessmen are profit oriented.

If Yunfei invests a huge amount of money in this project in the future and can't get a return in the market, he won't burn these research materials because he's angry? You know, the original contract clearly stated that these research materials can only be kept in Yunfei's company. If the National Machinery Research Institute wants to borrow these materials, it needs Yunfei's consent.

Sun Lin doesn't think anyone can borrow it, otherwise Yunfei won't ask for a patent after he strongly asked for a patent.

"Old sun, you don't have to worry. In the past, there were no CNC machine tools. Many things in our country could still be produced without CNC machine tools. At best, it's just that the cost is higher and the efficiency is lower. Don't worry, sooner or later the country will have the equipment it needs, but it's just a matter of time... "Yun Fei secretly felt funny about what Sun Lin and others were worried about.

All of these people have created such a large rotary table since they came up, not only because the domestic technology and materials can not meet the standards, but most importantly, it is estimated that they are considered from the use to the domestic military industry.

The cloud is not sniffing at this. Many parts in the military industry need four-axis machining centers, which can not be processed by simple four-axis machining centers.

"Don't you worry? Buying a four-axis machining center from West Germany is more difficult than buying an atomic bomb. It's not easy for others to sell it. The price is still high. Close to two million dollars, you calculate, we need at least hundreds of units in China. How much does it cost, and how much does the national tax revenue cost a year? " For Yunfei's words, Sun Lin shrunk his mouth and said lonely.

It's too much to say that he cares about the country and the people. The reason why he does this is that there are many high-precision equipment designed by the Machinery Research Institute, and those high-precision parts can only be made by four-axis machining center or even five axis machining center. Without equipment, their design cannot be verified.

Especially for the key parts used in many military industries, the requirements for various geometric tolerances of parts are quite high. There is no guarantee for repeatedly clamping parts in the processing process. Even if there is one that can be guaranteed, it must be scrapped better to have one or two that can barely meet the requirements. Moreover, the parts used in the test are unreasonable in many places, especially after finding the problem, in order to fully meet the design requirements, the requirements for the processing of parts will become higher.

Although the country has imported three four-axis machining centers from West Germany, those four-axis machining centers are the only three four-axis machining centers in China. One of the three was separated by aerospace, one by the aircraft manufacturing system, and the remaining one was finally robbed by the Navy.

Although the Academy of Sciences is the core of the whole domestic technology, it has no way to compete with those systems that urgently need the top machining equipment that China can get to improve the level of equipment.

"Sun Lao, even if you can make such a fourth axis, there is no way to process products with particularly high precision." Yun Fei said solemnly to sun Lin.

In China of the world, because the research direction of the three-axis machining center towards the four-axis machining center is shifted to the simple fourth axis, the research on the five-axis machining center has been stagnant.

"Xiao Yun, you said that if you process two spiral grooves with a sine function curve and a cosine function curve on a 12 ton, eight meter long shaft, the groove width accuracy is within one thread, and the rotation centers of the two closed spiral grooves must coincide with the centerline of the whole shaft, and the error cannot exceed one thread. Finally, we have to do dynamic balance to keep the speed of the whole shaft at a high speed of 3000 revolutions... Can we enlarge this rotary table? " Sun Lin also knew that Yunfei, a young man, could not answer his own questions.

This problem has plagued all mechanical engineers in China for many years.

"The torque of shaft parts eight meters long and 12 tons heavy is too large in the processing process. It is the c61125 heavy-duty lathe with a guide rail of ten meters long and a rotation diameter of one meter that can be produced in China. It is not generally difficult to process such high-precision heavy parts, even the outer circle. In particular, it is necessary to mill the closed spiral groove on it. For such a large shaft, it is impossible to complete the processing in a few days, that is, the rotary table must bear at least more than one ton of weight and the torque generated in the process of rotation. If you want to process such heavy parts, you must be a turning milling compound machining center above the precision level! " For such heavy parts mentioned by Sun Lin, although Yun Fei has seen more people in the world for decades, he really doesn't know what kind of things such parts are used for.

In the domestic military industry, what kind of equipment can use such a heavy shaft? Even if Yunfei racked his brains, he couldn't figure out what this was for. He knew that even if he asked Sun Lin, he would not tell himself that they had signed a confidentiality agreement.

For the confidentiality agreement, Yunfei also signed it that year. So he knows the relationship.

When Yunfei said that the turning and milling compound machining center, all the people had bright eyes. It seems that this boy knows a lot.

This is the first time they have heard of the word turn milling compound machining center.

"What is turn milling compound machining center? Why haven't we heard of it? " Sun Lin's face was vague about the turning and milling compound machining center that Yun Fei said.

I thought it was some advanced machining equipment developed abroad. Looking at my disciples and grandchildren, I was confused to see all the people. As long as the news of foreign advanced machine tools and equipment, they will know it at the first time.

"The so-called turning milling compound machining center is a machine tool, which not only centralizes the functions of lathe and milling machine. This is more high-end than the five axis machining center. " Yun Fei explained to the confused people.

It is estimated that the concept of turn milling compound machining center has just been put forward in this age. China will certainly not believe and understand these. Turning and milling compound machining center has not developed rapidly until several years after entering the 21st century.

After entering the 21st century, the aviation manufacturing industry has been developing rapidly. The product parts are characterized by many varieties, small batches, complex process, and the overall thin-wall structure and difficult to process materials are widely used. There are bottlenecks in the manufacturing process, such as long manufacturing cycle, large amount of material removal, low processing efficiency and serious processing deformation. In order to improve the processing efficiency and precision of aviation complex products, technicians have been looking for more efficient and precise processing methods. In order to improve the machining accuracy and efficiency of aviation parts, turn milling compound machining center appears.

Although the equipment appeared at that time only processed some small parts. There is no way to process heavy parts.

However, this provides a possibility for Yunfei. If the worktable of the gantry CNC milling machine is changed into a horizontal lathe, a heavy turn milling composite machining center will be formed. At that time, many people in the cloud non world put forward this theory, but the investment was too large to be made with hundreds of millions of research funds.

On the surface, such a device only needs to install the headstock and tailstock of the lathe on both ends of the worktable of the gantry milling machine, but it is not so easy to implement. Most importantly, the production cost of such heavy equipment is very high. Even the gantry milling machine that can process ten meter long parts costs tens of millions. Is such a lathe very expensive.

However, the combined price of the two will be several times, or even ten times, or twenty times the value of such ordinary equipment in two days!