Liu Lang introduced all the bearings in detail, including the characteristics and uses of each bearing, most of the workers here have not heard of it, they have not heard of it, basically there are few people in the country who know, some of the design of the bearings are beyond their imagination, do not look like bearings.

Liu Lang's class was an eye-opener for everyone, of course, this is just the relevant basics.

The next morning, everyone began to listen to the lecture in the conference room again, and the graphics on the blackboard had all changed, and Liu Lang left five kinds of bearings, each of which was split, and all the details were clear.

"Today we are going to learn these five kinds of bearings, these three have been seen by everyone, and the other two have not been seen before, but we learned yesterday, I will test everyone, Tong Zhanguo, you say!"

"Mr. Liu, these two bearings are thrust ball bearings and cylindrical roller bearings, thrust ball bearings are composed of washer-shaped raceway rings with raceways and ball and cage components, the raceway rings that match the shaft are called shaft rings, and the raceway rings that match the shell are called seat rings. The two-way bearing matches the secret shaft of the middle ring, and the one-way bearing can bear the one-way axial load, and the two-way bearing can bear the two-way axial load.

Cylindrical roller bearings are .........!"

Tong Zhanguo also wanted to say that Liu Lang hurriedly stopped him.

"Okay, okay, I'm just asking you to say your name, good guy, your mouth is very fast, you can't stop it, you can say it better than Shantian Fang!"

"Mr. Liu, I like to listen to Shantian Fang's commentary the most. ”

The other party immediately replied, and at the same time thought in his heart: Mr. Liu is really amazing, how can I know that I like Shantianfang at a glance?

Tong Zhanguo's answer made everyone laugh, this Tong Zhanguo is thirty-eight years old, almost the oldest, upright, sometimes stunned, but his heart is very hot, and he is the big brother of young people.

"Don't laugh, Brother Tong is older than most people, and his memory will weaken when he gets older, but he still memorized everything I said, which shows that Brother Tong is very hardworking, and you all have to learn from him. ”

"Well, that's right, we all have to learn from him!"

The others nodded one after another, and some of them even opened their books and looked at what Liu Lang said yesterday to deepen their impression.

"Brother Tong is right, we have to learn the manufacture of these five kinds of bearings from now on, everyone can understand these diagrams, start class!"

The five kinds of bearings can be manufactured by NORINCO at this stage, and the domestic demand is relatively large, and they can be directly put on the market after manufacturing.

Of course, there are many steps in the manufacture of bearings, a bearing is divided into three parts: steel ball, cage and ring, steel ball processing starts from raw materials, and goes through cold heading, light grinding, heat treatment, hard grinding, initial research, appearance, and fine research.

The cage starts from the raw material to go through cutting, cutting, finishing, forming, shaping, and rivet holes.

The ferrule is forged, annealed, turned, quenched, tempered, ground and finally assembled.

So many procedures North Industries Group will not participate one by one, what they have to do is only the core part, such as grinding, finishing, grinding, refining and other parts, and other steps will be handed over to other enterprises to carry out.

These steps are left to other enterprises in Fucheng, of course, no one has come forward yet, Song Lifeng has already implemented his plan in Fucheng, but it takes time, but Shencheng Machine Tool Factory and Jinling Machine Tool Factory can contract part of the work, but it is only one or two procedures.

Liu Lang began to prepare for this last year, so he had already made preparations, and last year Wang Zhendong took people to Shencheng and Anshan to go to Shencheng and Anshan a few times, and signed contracts with several smelters and bearing factories to let the other party manufacture rough billets according to the standards.

Liu Lang's rough billet standards have exceeded the standards of other enterprises' own production, and if you want to manufacture it, you have to transform it technologically, which also requires money, and the other party can choose not to do it.

However, the North Industries Group is very famous in the country, and the name of the Fucheng Special Industrial Zone has gradually become influential, and some enterprises still hope to cooperate with the North Industries Group, and the technical transformation can also ask the Ministry of Industry for some transformation funds.

The most critical point is that Liu Lang wrote out the technical transformation plans of these factories and told them how to transform, which is the most important link.

The example of the second generation of stainless steel smelting furnace is still vivid, the transformation of a smelting furnace requires millions of costs, no factory is willing to do, as a result, the Ministry of Industry gave the technology to a bankrupt enterprise in a fit of anger, and a large amount of expenses, and finally people made it, the quality of the smelted stainless steel has been greatly improved, just the annual military procurement volume has made other factories red, one by one regretted it, and now Liu Lang directly gave them the technical transformation plan, if they refuse, they are fools.

Therefore, several factories agreed to make the semi-finished products he needed for Liu Lang, and the price was not important.

Of course, the reason why they were able to transform the technology is mainly because the bearings made by Liu Lang are not too complex, and the parameters are not the best.

A month ago, the first batch of rough billets after cold and heat treatment was just transported to Fucheng, this batch of materials is not used to make products, but for everyone to practice, although the employees of NORINCO Group have mastered the basic skills, but they still need to further strengthen the practice to be competent for the next work.

Liu Lang is still as usual, how to grind this detail, how to polish this detail, what kind of process to use for some special details, it can be said that every detail is detailed and detailed.

After learning the theory, he immediately put it into practice, and thoroughly studied the theory in practice, which is Liu Lang's method and the most effective method.

Liu Lang's theory is the first in the country, Liu Lang's teaching method is the first in the country, and the equipment of the North Industries Group is the first in the country.

In the following week, the workers used up more than 10,000 rough blanks, Liu Lang bought 30,000 pieces, the rough blanks are large and small, the larger one is more than three yuan, and the smaller one is more than one yuan, that is to say, the workers have lost more than 20,000 yuan a week, and it is not a product, it is completely for the workers to practice their hands, so in terms of wealth, North Industries Group is also the first in the country.

The semi-finished products made of these rough blanks are not very ideal, and basically there are few pieces that can meet Liu Lang's requirements, but he is not angry at all, after all, the time is still short, and it is very good to be able to do this, so Liu Lang will start to teach everyone again. Fupin Chinese