Smart Industrial Empire

"Xiao Yun, tell me how to solve this problem?" In the mechanical processing workshop of Xinkaixing Ball Screw Factory in Rongcheng, Wang Qingfeng stared at Yun Fei with a gloomy face.

"How is your production process arranged? Do those Soviet engineers just eat and not work?" Yunfei used a micrometer to measure several points on the ball screw produced on site, and the size of each point was measured. There are very subtle changes.

The ball screw measured by Yunfei is not very long, only more than 300mm and less than [-]mm.During the grinding process of such a short ball screw, there is a knife phenomenon. The middle of such a short screw is actually a whole bit larger than the two ends!If this is a ball screw with a length of two or three meters, the arc-shaped spiral groove on the ball screw is ground against the center holes at both ends. On a screw with almost no rigidity, the knife phenomenon will be more obvious. At that time, I don't know how much the middle will be larger than the two ends.

As a result, these ball screws cannot achieve the designed accuracy at all. How can the machining accuracy be guaranteed for CNC machine tools using such ball screws?

"The No. 45 steel we use is quenched and tempered after forging, and the thread groove is roughly machined with a lathe, then the surface is subjected to high-frequency quenching, and finally ground." Although Wang Qingfeng, the general manager of the ball screw factory, is very concerned about I don't know much about the rod, but it is impossible to know nothing about the production process.

In particular, Wang Qingfeng was born as a mechanic, and as his boss, he used to have to do everything himself.

"Didn't I tell you to use bearing steel gcr15? Why use No. 45 steel?" Yun Fei was speechless.

Bearing steel can also be provided in China. Although the price is higher, but for the ball screw with high precision requirements and the supporting ball screw nut and ball, although the performance of 45 steel is very close , but the difference is still quite large.

"Soviet engineers said that our No. 45 steel has similar properties to bearing steel. No. 45 steel is easier to process than bearing steel, especially after heat treatment. No. 45 steel can only reach a maximum hrc Rockwell hardness of 48 degrees after quenching, and even if it reaches With that kind of hardness, the material has no toughness, and the ball screw made in this way will not have a long service life at all." Yun Fei shook his head and sighed.

This is the bitter fruit caused by the blankness of the domestic industry.Although there are no competitors due to the large demand in the domestic market; but also because of this situation, there are no professional talents in this field in China.Starting from scratch is not an easy task.

I clearly told them that the bearing steel gcr15 is used to produce the ball screw, but they replaced the material with the cheaper No. 45 steel.Could it be that in this age, no matter what you want to do, you have to stare at yourself?Especially in terms of CNC machine tools, although there are many people who study this area in China, most of them are strictly controlled by the state in national research institutes, and it is impossible to obtain those who don't know too much.But a well-founded researcher.

Yun Fei patted himself on the head.He really has a headache, Wang Qingfeng is a very good top management for such things, because no matter what the people under him say.As long as it is reasonable, as long as logical reasoning with written things can convince him, he will agree.

"Soviet people know shit, if they really know that ordinary carbon steel can replace bearing steel. Then what kind of steel is there?" Yun Fei was noncommittal to Wang Qingfeng's words.It seems that it is necessary to find an opportunity to have a good lesson with the Soviets.

"Old Wang, who is in charge of technology here?" Yun Fei is too lazy to pursue the person responsible for this incident.Fortunately, it is still in the experimental stage. Because this first production is experimental, only more than 30 semi-finished products with a length of 1.5 meters have been produced.

Yunfei understood that if it wasn't for the fact that the ball screws they produced could not meet the design accuracy requirements during the grinding process; It is not something produced in the ball screw factory that I partnered with Wang Qingfeng, it is related to the production of CNC lathes of Jiuyi Heavy Industry...

If it weren't for many reasons that made me come to the ball screw factory at this time, maybe I would wait until a large number of ball screws produced by the ball screw factory jointly produced by the two are on the market, and even after many years, I wouldn't bother with the ball screw factory. What material is the screw rod made of.

In that case, Jiuyi Heavy Industry will definitely receive a flood of complaints after its CNC machine tools are sold to the market and customers use them for a period of time. At that time, Yunfei can only cry without tears.Especially in the next few years, the competition in the domestic CNC machine tool market will become fierce.

China has now entered the era of market economy, and will join the World Trade Organization wto in a few years. If the quality does not improve, it will have a catastrophic impact on the company when it encounters an economic downturn.Once customer loyalty is lost, it is not easy to get it back.

In this era, the main reason why China's CNC machine tools, especially domestic CNC machine tools, have been criticized is the quality problem.Although the domestic market is blank now, as long as Jiuyi Heavy Industry can produce CNC machine tools, it will definitely occupy a large amount of the market soon.But after other manufacturers solved the ball screw problem, Yunfei's Jiuyi Heavy Industry Co., Ltd. will continue to shrink in the market due to quality problems, until finally it has no market share.

Of course, if the price is lowered, there will be a market for CNC machine tools no matter how trashy they are, as long as they are CNC machine tools. After all, many mass-produced parts do not require high machining accuracy.

"Xiaoyun, this is the current head of the technical department of our factory, Sevionwski, everyone in the factory calls him a dead chicken..." After Wang Qingfeng yelled "dead chicken" into the workshop, he saw A middle-aged, skinny white man in his 40s ran towards this side.

"Boss, are you looking for me?" Severnowski trotted up to the boss who called him a "dead chicken", and uttered a blunt Chinese sentence with his stiff tongue, which made Yunfei extremely uncomfortable listening.

"Why use No. 45 steel instead of the bearing steel I chose?" Yun Fei stared at the other party with an unfriendly expression, expecting him to give him a reasonable explanation.

Although these engineers from the Soviet Union have a good mechanical foundation in their country, when they come here, although Wang Qingfeng gave him the position of the head of the technical department, he should not secretly work without knowing the situation. Be the master, change the raw materials you choose and the process route you make.

There are many differences between the Soviet Union and China not only in terms of materials, but even in terms of technical standards.

Severnowski didn't understand Yun Fei's words, and stared at Wang Qingfeng with a puzzled face. Seeing Wang Qingfeng repeating Yun Fei's words, he couldn't understand, so he could only search around for the translator in the factory, although he came at some time. It's been a month or two, but Chinese, for those who use letters, square characters are not only difficult to recognize and write, but even difficult to pronounce.

Wang Qingfeng was depressed. At the beginning, when Severnowski first arrived here, he told the translator that during working hours, he had to follow wherever the dead chicken was. He couldn't see it now. Translation, as the temporary operator of his factory, where should he put his face in front of another shareholder with the same status as him?

"By inquiring about the material grades of China's national technical standards formulated in 1981, I think that in most occasions, No. 45 steel can replace bearing steel..." Severnowski knew after the translation, The young man in front of him turned out to be another boss of his own, and the shares in his hand were not less than that of the boss who was joking all day long, so he seriously explained to Yun Fei.

"Don't tell us, you didn't analyze the material!" Regarding the product in front of him, Yun Fei interrupted impatiently. How could he not know that in some not very important occasions, No. 45 steel can replace many materials.

But the production of ball screw is just an important occasion!In particular, the ball screw is one of the decisive factors for the accuracy of CNC machine tools!

"..." Sevionwski was noncommittal to Yun Fei's words.How much can such a young man in front of him, who is 20 years old at the top, know?Although I have not been in contact with the design and production of high-precision parts such as ball screws, there are many other high-precision parts designs.

"From now on, change it back to me immediately. You must strictly follow the materials and production process I gave at the beginning for trial production, otherwise you will go back to your Soviet Union!" Seeing this dead chicken, Yun Fei gritted his teeth and burst into tears. Staring at himself with a blushing face, he also knew that this guy must think that he might be the second generation of rich parents in his family, and he is here to command blindly.

Yun Fei is angry!

In his world, more than 90.00% of the ball screw production is made of bearing steel gcr15. Since there are on-site products available, why spend a lot of time and energy comparing various materials?This is an experiment, and it will take a long time.

It is about to enter 1993, and Taiwanese machine tool manufacturers are about to enter the domestic market on a large scale. If they cannot gain an absolute advantage in the Chinese market when they build factories, they will definitely fall into a protracted price war.

"The cost issue, you don't need to think about it now. Even if the 45 steel can achieve this effect, there will not be much cost left. At that time, it will cause a lot of troubles for the company because of product quality problems..." Yun Fei saw Although Sevionwski agreed, the expression on his face showed that he was not convinced. (to be continued..)

ps: Bow down and thank Aguang 1 and kgb31 for their monthly tickets, and thank you Bingzhihen for your great reward.