Intelligent Industrial Empire

For these high-precision ball screws, the precision maintenance of the production process even far exceeds that of high-precision production equipment.

Yun Fei doesn't think that the production process used by countless manufacturers in his own world cannot guarantee the accuracy of the ball screw.

"The most important issue in the production of ball screws is not just the material. But now we can only control the arrangement of the production process. I think, in your Soviet Union, the production process is also very important? Especially in these precision It’s a very high-level part. Of course, for you, I don’t require you to be able to produce a zero-level precision ball screw according to the Chinese national standard, but you must at least produce a three-level ball screw for me! Otherwise, How can you be worthy of your annual salary of twelve thousand?"

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

For the current production, Yunfei's requirements are not so high. As long as this factory can produce ball screws that barely reach the five-level accuracy level, it can meet the use of Jiuyi Heavy Industry's 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 one wire and eight wires. Most of the mass-produced parts have a production schedule of four or five wires or more, or even more than ten wires.High-precision machine tools, used to produce these parts that are not too demanding, are not cost-effective at all. Not only are they relatively large in wear and tear, reducing the service life and processing level of the machine tools, and more importantly, precision CNC machining machines , The price is several times or even dozens of times that of simple CNC machine tools.

In the world of Yunfei, there are millions of CNC machine tools in the entire country, of which more than 90% are the most low-level simple CNC machine tools.At the same time, the total value of 90% of the lowest-level simple CNC machine tools can only be compared with the value of 10% of the medium 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 grade CNC machine tools is about 1.5 to 3 to 5.5. Although Germany and Japan have the technology of CNC machine tools today, the number is far less than that of the United States. The ratio of CNC machine tools in different gears far exceeds that of the United States.

Therefore, if you want to produce CNC machine tools in China, Yunfei will never give up in the mid-to-high-end market, and will have to bite into the fat. On the surface, the value of low-end CNC machine tools is not very high. Will give up.

Now, when Yiqiangerbai didn’t have the slightest foundation, Yun Fei didn’t expect to rely on the fact that he had seen a lot of CNC machine tools in later generations, and also operated a lot of CNC machine tools and some theoretical knowledge he had mixed with Du Niang It can produce mid-range and even high-end CNC machine tools.

If it was that easy, it wouldn't be when he left his own world that Huaxia hadn't produced high-end CNC machine tools in the true sense.China's real domestic companies cannot even produce a five-axis machining center!

Since the current goal is the largest low-end CNC machine tool market in China, the low-end simple CNC machine tools that use millions of dollars, if you use those ball screws with a precision level of three or more, it is simply a sledgehammer. , A huge waste.

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

He knew that although Du Niang's production technology could be processed, it could not achieve the high level of accuracy.

So he added forging, rough turning, quenching and tempering, lathe finishing, and then cold-rolled the arc spiral groove on the ball screw, high-frequency quenching, and then arranged a lathe finishing before the final Grinding process.

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

In Europe and the United States, most of the shaft end hard turning processing technology is adopted, which is simple and efficient. At present, China still uses the traditional process of turning the bearing seat after the shaft end is annealed. The domestic production process is compared with foreign countries, both in terms of use effect and manufacturing cost. In all, it goes without saying.Large margin processing hardened steel ball screw processing technology is more flexible, easy to arrange production, instead of annealing process and secondary quenching processing technology; in addition to the exquisite appearance of the processed product, the shaft end is also reduced due to multiple times Defects of unstable ball screw performance caused by heat treatment.

Yunfei was originally an on-site technician in the production workshop, and he knew better than those who just spent a lifetime in the office holding theory books and doing craftsmanship for a lifetime of how to reasonably use existing equipment to achieve the highest production efficiency and highest production accuracy.

He wants to use the hard turning process often used in Europe and the United States, but the current domestic tools simply cannot reach the Rockwell hardness of HRC58-62 for mass roughing.The production cost is too high to use imported ceramic blades. Similarly, the hardest diamond blades can only be used for finishing, and cannot be used for roughing at all. Otherwise, the cost of the blades alone will cost them four Millions of lost money!

Therefore, under the current situation, Yunfei can only use more complex processing techniques to produce ball screws with a low degree of precision.

Anyway, Jiuyi Heavy Industry is his, forging and heat-treating these costs, but he himself put the money of him and Wang Qingfeng in his own pocket.Wang Qingfeng has nothing to say about this.

If Yunfei weren’t playing with him, there would definitely be a production workshop specializing in the production of ball screws in the huge factory building of Jiuyi Heavy Industry. If this were the case, Wang Qingfeng could only look at Yunfei’s other flowers. It took one-fifth of his own factory to buy a favored Yunfei to make money every day.

He was very unfamiliar with the production process, especially the ball screw, something he hadn't touched before Yunfei said it.The materials selected by the Soviets and the precision designed by the production process could not be achieved. After being modified by Yunfei, it was achieved in a short time!

Wang Qingfeng sees the market prospects of ball screws 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, so much profit!You know, the ball screw is not other products, it is an indispensable key part of CNC machine tools!

Ball screws are sold in China, but they are sold by rice!

Calculate, the material cost of a ball screw with a diameter of 50 mm and a length of two meters is only three or four hundred yuan, plus various costs such as heat treatment, processing fees and factory management fees, but only about one thousand yuan. But it costs at least four or five thousand yuan to buy it on the market!

Inferring from the general machine tool market in China, even if China produces 50,000 CNC machine tools every year, if half of the factories buy ball screws from the factories of both him and Yunfei, Wang Qingfeng faints happily when he thinks of this data. Up.

Moreover, more than one roller screw can be used on a CNC machine tool!Although the length is different and the specifications are different, in this era of China, a ball screw is sold for 3,000 yuan per meter, and someone will definitely rush to buy it.

The ball grinding machine scoured from the West German second-hand market has been improved by those old hairs of Jiuyi Heavy Industry, and it is more efficient; the production of ball nuts is far simpler than the production of ball screws.

The connection between the ball screw and the ball nut adopts the circular elbow type designed by Sevianvsky.Yun Fei didn’t know what this connection method looked like at first, but when the ball screw, ball nut and ball were all produced, he discovered that this is the most widely used connection in his world. .

The so-called circular elbow connection means that the ball returns to the screw rod and the nut through the circulation groove outside the nut after the loop process is over.This connection form has a simple structure, good manufacturability, and high load-bearing capacity. The only downside is that the radial size of the nut is large. After all, there are two layers of spiral grooves on the nut, which is used to keep the roller from the nut. Circulate 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 you want to buy a ball screw on the market, you have to sell not only a ball screw with a relatively high precision arc spiral groove, but also a ball nut and balls that match the ball screw.

These things, combined together, form a ball screw pair.

Rongcheng Xinkaixing Ball Screw Factory sells ball screw pairs.

With Yun Fei, a man from later generations in charge, the ball screw test at Xinkaixing Factory in Rongcheng went well.In just over ten days, a sample of the ball screw was produced after replacing the production material and production process.

Although this test meets the design requirements in all aspects, whether it can be used in the market will not be known until Yunfei's Jiuyi Heavy Industry has produced the first CNC lathe and used it for a period of time.Therefore, now the main energy of Xinkaixing in Chengdu has been put into the business of CNC machining again.

If Jiuyi Heavy Industry can produce CNC lathes, it will enable the entire Chengdu Xinkaixing Ball Screw Factory to develop greatly.Similarly, if this ball screw can ensure the stability of quality, the CNC machine tools of Jiuyi Heavy Industry will definitely quickly occupy the domestic market of international machine tools assembled with imported ball screws of low precision.

Everything is waiting for the first CNC machine tool of Jiuyi Heavy Industry to go offline!