Smart Industrial Empire

For these high-precision ball screws, the production process maintains precision far more than high-precision production equipment.

Yunfei does not think that the production process used by countless manufacturers in his own world will not be able to guarantee the accuracy of the ball screw.

"The most important issue in the production of ball screws is not just the material. But now what we can control is only the arrangement of the production process. I think, in your Soviet Union, the production process is also very important? Especially in these precision levels Quite high parts. Of course, for you, I don’t require you to be able to produce zero-grade precision ball screws of China’s national standards, but you must at least produce three-grade ball screws for me! Otherwise, how can you Worthy of your [-] annual salary?"

The work of the ball screw factory is not very heavy, but this proud mechanical engineer from the Soviet Union must put some pressure.

For the current production, Yunfei's requirements are actually not that high. As long as the factory can produce ball screws that can barely reach the five-level precision level, it can meet the needs of Jiuyi Heavy Industry for the production of CNC machine tools.After all, in the current domestic market, the largest market is not high-precision precision machining CNC machine tools, but a large number of simple CNC machine tools.

The production range of simple CNC machine tools generally has a minimum tolerance of more than eight wires. Most of the mass-produced parts have a production progress of more than four wires or five wires, and many even exceed ten wires.High-precision machine tools are not cost-effective at all for the production of parts that are not too demanding. Not only will the wear and tear on the machine tool be relatively large, the service life of the machine tool and the processing level will be reduced, and more importantly, precision CNC machining machine tools , the price is several times or even dozens of times that of simple CNC machine tools.

In Yunfei's world, there are millions of CNC machine tools in the whole country.More than 90.00% of them are the most low-level simple CNC machine tools.At the same time, the sum of the value of the 90.00% lowest-level simple CNC machine tools can only be compared with the value of [-]% of the middle and high-end CNC machine tools.

In other countries, especially the United States, which has the largest number of CNC machine tools, the ratio of the number of high, medium and low-end CNC machine tools is about 1.5 to 3 to 5.5. Although the technology of CNC machine tools in Germany and Japan is today, the number is far less than that of the United States. The ratio of CNC machine tools in this gear far exceeds that of the United States.

Therefore, if China wants to produce CNC machine tools, Yunfei will never give up on the mid-to-high-end market.Yun Fei will not give up on a low-end CNC machine tool that is not very valuable on the surface.

Now, when he is poor and has no foundation at all, Yun Fei does not expect to rely on the knowledge he has seen and operated a lot of CNC machine tools in later generations and some theoretical knowledge he got when he was fooling around with Du Niang. It can produce mid-range or even high-end CNC machine tools.

If it was really that easy, Huaxia would not have produced high-end CNC machine tools in the true sense when he left his own world.China's real domestic companies can't even produce five-axis machining centers!

Since the current goal is the largest low-end CNC machine tool market in China.If the low-end simple CNC machine tools used in the millions are used with ball screws with precision grades above three, it would be a waste of money.

The production process of the ball screw arranged by Yunfei.Although it is more complicated than the current one, it is easier to ensure the machining accuracy than this one.The production process of the ball screw designed by Yunfei is several more than the production process in his own world.

He knows the production process on Du Niang.Although it can be processed, it cannot reach a high level of precision at all.

Therefore, he added forging, rough turning, quenching and tempering, and lathe finishing to the front, and then carried out the circular arc spiral groove on the cold-rolled ball screw, and after high-frequency quenching, he arranged for a lathe finishing before the final finishing. Grinding process.

This production process is not the cold-rolled ball screw used in China (often called "rolled screw" in Europe and the United States).Most of them are made by rolling in batches, and then made into ball screws of different lengths according to needs.The pressing process of the ball screw thread is mostly the same at home and abroad, and the processing technology of the single cold-rolled ball screw in the later period is slightly different.

Europe and the United States mostly adopt the shaft end hard turning process, which is simple and efficient; China is still mostly the traditional process of turning the bearing seat after the shaft end is annealed. Compared with foreign countries, the domestic production process is not only in terms of use effect but also manufacturing cost. Speaking, it is self-evident.The process of processing hardened steel ball screw with large margin is more flexible, which is convenient for overall production arrangement, replacing the annealing process and secondary quenching process; in addition to the exquisite appearance of the processed product, the shaft end is also reduced due to multiple Defects of unstable ball screw performance caused by heat treatment.

Yunfei was originally an on-site technician in the production workshop. He understands how to rationally use the existing equipment to achieve the highest production efficiency and highest production accuracy than those who have only worked in the office with theoretical books for a lifetime.

He wanted to adopt the hard turning process that is often used in Europe and the United States, but the current domestic cutting tools are simply unable to achieve mass rough machining with a Rockwell hardness of hrc58-62.Using imported ceramic blades, the production cost is too high. Similarly, the hardest diamond blades can only be used for finishing, and cannot be used for rough machining at all. Otherwise, the cost of the blade alone will cost the two of them 400 Ten thousand blood lost!

Therefore, under the current circumstances, Yunfei can only use more complex processing techniques to produce ball screws with less precision.

Anyway, Jiuyi Heavy Industry belongs to him, the cost of forging and heat treatment is just that he puts his and Wang Qingfeng's money in his own pocket.For this, Wang Qingfeng has nothing to say.

If Yunfei hadn't just wanted to take him to play, there would definitely be a production workshop dedicated to producing ball screws in Jiuyi Heavy Industry's huge factory building. If so, Wang Qingfeng could only look at Yunfei in depression. Yun Fei, who pays a fifth of his own factory to buy a favor, makes a lot of money every day.

He is very unfamiliar with the production process, especially the ball screw, which he has never touched before Yunfei said it.The materials chosen by the Soviets and the precision of the production process designed by the Soviets could not be achieved. After being changed by Yunfei, it was achieved in a short time!

Wang Qingfeng has seen the market prospect of ball screw now.Especially in the current domestic CNC machine tool industry, after the emergence of Huadu CNC's dragon system, a large number of foreign key parts are exported to China, what a huge profit!You should know that the ball screw is not another product, it is an essential key part of CNC machine tools!

The ball screw is in China, but it is sold by rice!

After calculation, the material cost of a ball screw with a diameter of 50 mm and a length of two meters is only 400 yuan, plus various costs such as heat treatment, processing fees, and factory management fees, it is only about 1000 yuan. Go to the market, at least 5000 yuan!

According to the general machine tool market in China, even if China produces [-] CNC machine tools every year, if half of the factories buy ball screws from the factories of him and Yun Fei, Wang Qingfeng will faint happily when he thinks of this data. up.

Moreover, more than one roller screw can be used on a CNC machine tool!Although the lengths and specifications are different, anyway, in this era of China, ball screws cost 3000 yuan per meter, and there will definitely be people rushing to buy them.

The ball grinding machine bought from the second-hand market in West Germany is more efficient after being improved by the old men of Jiuyi Heavy Industry; the production of ball nuts is far simpler than the production of ball screws.

For the connection between the ball screw and the ball nut, Yunfei adopts the circular elbow type designed by Severnowski.Yunfei didn't know what this connection method looked like at first, but when the ball screw, ball nut and balls were all produced, he realized that this was actually the most widely used connection method in his world during the final assembly. .

The so-called circulation elbow connection means that the ball returns to the screw rod and the nut through the circulation groove outside the nut to re-enter the circulation after the circulation process is completed.This connection form is simple in structure, good in manufacturability, and relatively high in carrying capacity. The only downside is that the radial dimension of the nut is relatively large. Circulation is carried out in the middle of the screw rod.However, this shortcoming cannot be called a shortcoming for the current Chinese CNC machine tool market!

Of course, if the ball screw is to be bought in the market, it is not only a ball screw with a relatively high-precision circular arc spiral groove, but also a ball nut and balls that match the ball screw.

These things, combined, form a ball screw pair.

Rongcheng Xinkaixing Ball Screw Factory sells ball screw pairs.

With Yun Fei, a person from later generations, sitting in the town, the test of a ball screw in Xinkaixing Factory in Rongcheng went smoothly.In just over ten days, a sample of the ball screw was produced by replacing the production materials and production process.

Although this test meets the design requirements in all aspects, it will not be known until Jiuyi Heavy Industry of Yunfei produces the first CNC lathe and uses it for a period of time whether it can be used according to the market demand.Therefore, now the main energy of Xinkaixing in Rongcheng is once again invested in the business of CNC machining.

If Jiuyi Heavy Industry can produce CNC lathes, the entire Rongcheng Xinkaixing Ball Screw Factory will have a great development.Similarly, if this ball screw can guarantee stable quality, Jiuyi Heavy Industry's CNC machine tools will definitely quickly occupy the domestic market for international machine tools assembled with imported ball screws with low precision levels.

Everything is waiting for Jiuyi Heavy Industry's first CNC machine tool to roll off the assembly line! (to be continued..)

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