"There is a good saying in the movie "Little Soldier Zhang Ga": 'Don't look at the fuss you are making now, be careful that you will pull the list in the future!' Yun Fei, who had figured everything out, was full of energy in his heart.

Since then, Yun Fei has been staying at the site of the technical department and the production workshop every day, changing the drawings of the old Maozi who guard the technical department every day, and constantly discussing the rationality of various designs with Sun Lin. Yun Fei has no experience in the design of CNC machine tools, but he has seen a lot of CNC machine tools, such as Germany, Switzerland, Japan, and the United States.

Sun Lin has studied CNC machine tools all his life, for the most advanced foreign CNC machine tools, although he has not seen it, but he has heard of some theories used in advanced CNC machine tools, the only deficiency is that he does not know how these theories should become reality on CNC machine tools.

For example, the rack and pinion transmission method used in foreign heavy-duty CNC machine tools, Sun Lin wanted to use it in the CNC machine tools of Jiuyi Heavy Industry, but was despised by Yun Fei.

Just kidding, the use of rack and pinion is just to ensure the rigidity of the machine tool when it is processed under heavy loads, and the transmission accuracy is not as high as that of the ball screw. Especially the transmission speed, there is no way to compare with the transmission of the ball screw pair. Let's not talk about whether Sun Lin can now make a high-precision rack and pinion under the existing conditions, if the rack and pinion are used on small CNC machine tools, the positioning accuracy of the machine tool can be guaranteed to three wires is lucky, coupled with the low speed of rapid movement, it is estimated that the CNC machine tool has just been studied, and it will be killed by the customer.

"What is the customer pursuing when buying CNC machine tools? Machining accuracy is the first pursuit of our machine tool manufacturers, customers pursue not only the machining accuracy of machine tools, they are more in pursuit of machine tool processing efficiency! We can't reduce the cutting efficiency of our machines in order to improve the rigidity of our machines! Nowadays, many of our customers, especially the largest customer base of our machine tools, are not state-owned factories. It's those private enterprises that are gradually increasing, private bosses! They buy CNC machine tools, mainly to make money. Yun Fei said to a group of Chinese and Soviet designers led by Sun Lin and Savavsky who were discussing whether to reduce the rigidity of the machine tool in order to strengthen it.

He didn't expect that Sun Lin would actually use the rack and pinion transmission scheme that was killed by himself to the 6132 CNC lathe they produced.

"Now we must launch our products as soon as possible, otherwise when the market is carved up by other machine tool companies, our products, even if they are better than others, will not have much market."

"We must be guided by the market, what the market needs, what kind of machine tools the customer needs. What kind of products do we have to launch, wait until our first batch of CNC lathes are on the market, and after being recognized by customers, we will develop new products according to market conditions and customer needs. There is only one here, no matter what you think, in a lathe with a rotation diameter of less than 600 times, you must not use rack and pinion transmission, deny the design scheme. I'm not going to let him pass! "Yun Fei is here, but it doesn't matter that Sun Lin is not his employee.

It's almost a month, the design of the new CNC lathe has not yet come out, and the design of the CNC milling machine is nearing the end. Perhaps it is precisely because of this that they have the heart to be idle here, and they want to apply the design scheme of rack and pinion transmission to small CNC lathes.

Sun Lin heard Yun Fei's strong tone, and his face smiled.

Yun Fei said so. That is to say, as long as the first batch of 6132 small CNC machine tools designed by Jiuyi Heavy Industry has a firm foothold in the market, it will begin to study heavy-duty lathes with a rotation diameter of more than one meter.

What's the deal with small CNC machines?

Heavy-duty CNC machines. In China, an increasingly industrialized country, it is the most important key equipment. No matter what you do, you can't extend the guide rail of a small lathe with a slewing diameter of only three or four hundred millimeters to eight or even ten meters, right? Even at that level, it is simply impossible to produce heavy parts that weigh in tons.

A guide rail that is not wide, after being lengthened, cannot stabilize the structure at all.

In industrial production, the production of heavy parts is the key.

The spindle of some large machine tools, even tens of tons or hundreds of tons, is impossible for small machine tools to drive. Not only because the design of the bed structure should be determined according to the domestic production situation, but also because the material is also a very critical issue.

Now the spindle of Jiuyi Heavy Industry's CNC milling machine is stuck by the problem of materials.

China is now able to produce 42CrMnSi in small batches, but there are too many impurities in it, and it is not compared with foreign ones at all.

Imported 42CrMnSi, although the quality is guaranteed, but the price is very high, the price of a ton has to be tens of thousands! Yun Fei first proposed to use such materials as the main production materials, but Sun Lin and others fiercely opposed them.

In the Chinese Academy of Sciences, Sun Lin and his team have used this material to conduct many tests, but they have never succeeded.

The domestic one is not good because of the material problem, and the foreign one cannot meet the design requirements because the domestic heat treatment process can not meet the design requirements, resulting in the metal fatigue of the processed spindle under the long-term high-speed rotation......

Now Jiuyi Heavy Industry has become a research workshop.

In the smelting workshop, the development of 42CrMnSi has begun according to the ratio given by Yunfei, and the heat treatment section of the smelting workshop is also constantly improving the flow of various heat treatment processes and constantly testing the various temperatures of heat treatment.

There is no big problem in the machining workshop, after all, many of the old workers in the whole workshop are experienced old workers, and many people are very good at their skills. Just like when Yun Fei first came to Qingfeng Machinery to take the position of master master, the performance made the lathe workers of the entire factory amazed by the slender pole of the car, which was not a matter at all in the eyes of these masters who came out of the mountains!

Yun Fei is in Jiuyi Heavy Industry, and now he never dares to show off in the workshop, otherwise, he will lose face by those unruly workers, and he, the young boss, will not be able to get off the stage. However, in theory, Yun Fei is right, and often bluffs those eighth-level and nine-level masters who think they are the first in the world, if Yun Fei says the theory, these workers can't meet the design accuracy requirements on the drawings after the test, or can't improve production efficiency, these workers will definitely sneer at Yun Fei, the idle egg who ran to the production workshop to guide blindly.

Every time the workers feel that it is impossible to achieve it, Yun Fei casually says that he can solve a lot of processing problems that make these masters headaches. The masters don't know the existence of Lu Dao Du Niang, and they don't know Lu Dao, in this world, somewhere, there are all kinds of big people who have nothing to do with a day at work, and specially designed some super precision parts to let others help solve them.

Otherwise, we will discuss the processing technology of various atypical complex parts, and everyone thinks that the processing technology arranged by themselves is the most reasonable, the most effective, and the most effective to ensure the machining accuracy! In this way, it will be cheaper for beginners like Yun Fei who only know some fur.

Yun Fei learned more from Du Niang, especially those professional websites in mechanics, far more than he learned in school. Because many of the things that those big names take out to show off are their secrets in reality. If it weren't for the east wind overpowering the west wind, it would be impossible to let some irrelevant little whites know the road. In particular, the setting of various parameters is obtained by the summary of countless experiments conducted by many factories.

"Xiaoyun, now the spindle sample of the test machine has been made, but how do we do the dynamic balance?" Sun Lin saw the spindle of the CNC milling machine with countless steps and an accuracy of four levels in front of him, and he was extremely embarrassed.

Now the processing has been completed, but Jiuyi Heavy Industry does not have the key equipment to do dynamic balancing at all.

In the whole of China, it is estimated that there is no professional equipment for the dynamic balance of high-speed rotating spindles.

The first CNC milling machine designed by Jiuyi Heavy Industry is now short of this spindle for dynamic balancing.

"Let's use the soil method, install rotors on both sides, let the spindle reach a speed of 5,000 revolutions and measure continuously, and then remove those excess margins after stopping......" For this, Yun Fei can only use the soil method.

Even in his time, the dynamic balancing equipment that can make relatively large shaft parts in the entire Rongcheng will not add up to more than one slap.

If it is those hundreds of kilograms, or even tons of heavy weight, tell the rotary spindle, dynamic balancing, it is even more necessary to do.

"Lao Zhao, this assembly, you and Guderian have to do it yourself, if this assembly can achieve the accuracy of the design, our 6132 and 6140 can be finalized......" When all the parts were placed in the dust-free assembly workshop, Yun Fei said to Zhao Bingbiao, who was about to command people to start the most basic mechanical assembly.

The previous prototype, although it did not become the final finalized product of Jiuyi Heavy Industry, is not because the assembled machine tool did not reach the design accuracy, but because the design is not very reasonable in many places.

Yun Fei has seen countless machine tools, even the most rubbish CNC machine tools in that era, put it now, it will definitely be a relatively high-end CNC machine tool. Therefore, he is reluctant to produce the machine tools produced by his own company and the CNC machine tools on the market.

To do it, you have to do the best you can.

If it weren't for the changes in the market situation now, Jiuyi Heavy Industry is facing the danger that the capital chain is about to break, otherwise, Yunfei will never let these CNC machine tools that are still defective products in his eyes go to the market. (To be continued......)

PS: Bow and thank you for the ice marks, and you will be a big reward from qualified readers and red pen dragon films. The gourd was carelessly grateful.

Now I find that everyone just reads books silently every day, and they don't like to vote anymore......