The low-end products in Liu Lang's eyes are not actually low-end. The bearings he manufactures are not the "waste products" made by the bearing factory where Liu Donglai originally worked. He wants to create bearings that can be used on second-generation machine tools. The reason why
Called low-end, it means that this kind of bearing can be extended downwards, which can be used for downstream products manufactured by some other companies, such as rough bearings, etc., which is a downstream product that Norinco does not bother to make, but it is still
It cannot be left without it, and it can be left to other companies.
A seven-day Spring Festival holiday has passed, and everyone's mood quickly recovered from the lively Spring Festival to the intense work. Starting from the second week, Norinco entered a high-intensity working state, but everyone is used to it.
Young people, the oldest is only about forty years old, the youngest is twenty-four or five years old, and then
In addition, the food was very good and everyone was very energetic. In this week, we tried to make more than two hundred high-quality knives. The scrap rate was less than 1%, but it was still a bit high because of the workers' attention to some details.
There are still some minor problems, but they are not major. Liu Lang wants to reduce the scrap rate to less than 0.5%.
The cutting tools were placed on the table and looked eye-catching. The workers were very excited. They knew that the quality of these cutting tools was much better than those used in the old machine tools. In terms of service life,
The design is three times higher. In fact, there is no need to look at the design. They are all experts. You can tell how powerful this thing is by touching the edge of the knife.
But these are just the beginning, the next work is the important thing.
In the spacious conference room on the seventh floor, all employees of Norinco, including employees of Shencheng No. 3 Machine Tool Factory and Jinling Machine Tool Factory branch, totaling more than 350 people, were sitting there quietly.
There are various bearing graphics drawn on the huge blackboard in front of everyone, and there are also different styles of bearings on each row of tables. Liu Lang is going to teach everyone again.
Workers like to listen to Liu Lang's lectures. First, they can learn the latest knowledge. You must know that Liu Lang's knowledge cannot be learned from domestic textbooks. This is the world's advanced level. After learning it, you will be an expert. Second, Liu Lang's knowledge
Lang's class is a "multi-dimensional" teaching style. Not only does he speak passionately, he also provides live demonstrations. Each class lasts for one and a half hours, but no one is impatient. It seems to have passed in the blink of an eye.
"Okay, I've called you here today to teach you a lesson. I remember the last time I taught you a lesson was two months ago. It feels like a long time. Why is it so long? In fact, I have to learn myself, because if I don't
I don’t have much to teach you anymore.”
Liu Lang's words made everyone laugh. The most important thing Liu Lang lacked was money, and the second was the knowledge in his mind. Even people like Chen Wei of Huaxia Industrial Technology were like primary school students in front of him.
"Don't laugh, everyone. The lesson I'm going to teach you today is something I've recently learned in a hurry. I'll teach it as soon as I can while I still remember it. Otherwise, I'm afraid I'll forget so many graphics and knowledge."
There are more than ten different styles of bearings drawn on the blackboard, and there are dense explanations next to them. It really took Liu Lang three days to draw and write these contents. Because he is not tall, and the blackboard is tall, it is enough
It was more than three meters high and five meters long, so Liu Lang also made a very exquisite shelf for himself, on which he could stand and sit and draw.
"Okay, enough gossip, let's go to class!"
All the employees had already been copying with pens and notebooks, and they all raised their heads when they heard Liu Lang's words.
"Obviously, what we are learning today is bearings. What is painted on the blackboard is more than 90% of the types of bearings in the world at this stage. There are fourteen types in total. I believe everyone knows most of them, such as this bearing!"
Liu Lang pointed to a bearing pattern in the top corner with a metal rod.
"Zhang Mingda, do you know what kind of bearing this is?"
Liu Lang called someone.
"Angular contact ball bearing with a contact angle of fifteen degrees!"
The other party answered.
"Very good, Lao Zhang, how did you know?"
Liu Lang's "incredible" expression caused a burst of laughter.
"Mr. Liu, you have talked about this bearing before!"
The other party was a little embarrassed.
"Have you ever said it? Have I ever said this before? How could I remember it? Song Yi, have you ever learned this?"
"Mr. Liu, there are only four that we have learned before, and we have never learned the others. However, you just briefly talked about them at that time without explaining them in detail."
"So that's it! I thought there was something wrong with my memory, that's good, that's good!"
Liu Lang's acting skills are absolutely top-notch. Of course, he is just to liven up the atmosphere.
"Lao Zhang is right, this is an angular contact ball bearing, and it is at a fifteen-degree angle.
There is a contact angle between the bearing ring and the ball. The standard contact angle is fifteen degrees, thirty degrees and forty degrees. The larger the contact angle, the greater the axial load capacity. The smaller the contact angle, the greater the load capacity.
Conducive to high-speed rotation, single-row bearings can withstand radial loads and one-way axial loads. Two single-row angular contact ball bearings that are structurally combined on the back share an inner ring and an outer ring and can withstand radial loads and two-way axial loads.
Single rows are used in machine tool spindles, high-frequency motors, gas turbines, small car front wheels, differential pinion shafts, and double rows are used in oil pumps, air compressors, and various transmissions."
Because it is used on the spindle of machine tools, everyone knows about this bearing, and they have disassembled countless machine tools.
"Everyone has seen this kind of bearing. It is very good. You may not have seen this one. It is an aligning ball bearing. It looks like a double row of steel balls. The outer ring raceway is an inner spherical type. It can automatically adjust due to the deflection of the shaft or shell.
Or misalignment of the shaft center caused by non-concentricity, the tapered bore bearing can be easily installed on the shaft by using fasteners, and mainly bears radial load. It is commonly used in woodworking machinery, textile machinery transmission shafts, and vertical seated self-aligning bearings.
This is a spherical roller bearing. This type of bearing is equipped with spherical rollers between the spherical raceway outer ring and the double raceway inner ring. According to the different internal structures, it is divided into four types: r, rh, rha and sr. This is
International usage, since the arc center of the outer ring raceway is consistent with the bearing center, it has
Alignment performance, so it can automatically adjust the axis misalignment caused by deflection or non-concentricity of the shaft or housing, and can withstand radial load and bidirectional axial load. It is commonly used in papermaking machinery, reduction devices, rolling mill gearbox seats, steel rolling
Machine rollers, crushers, vibrating screens and vertical seated self-aligning bearings.
This is a thrust spherical roller bearing. The spherical rollers in this type of bearing are arranged obliquely. Since the raceway surface of the seat ring is spherical and has self-aligning performance, it can allow the shaft to tilt to some extent. The axial load capacity is very large.
In addition to the axial load, it can also bear some radial loads. Oil lubrication is generally used when in use.
This is a deep groove ball bearing. Structurally, each ring of a deep groove ball bearing has a continuous groove raceway with a cross-section that is approximately one-third of the equatorial circumference of the ball. Deep groove ball bearings are mainly used to withstand
radial load and can also bear a certain axial load. When the bearing
When the radial clearance increases, it has the properties of an angular contact ball bearing and can withstand alternating axial loads in two directions. Compared with other types of bearings of the same size, this type of bearing has a small friction coefficient and a high limit speed.
It has high precision and is mainly used in automobiles and other equipment.
This is a thrust ball bearing... This is a thrust roller bearing... This is a cylindrical roller bearing... This is a four-point contact ball bearing... This is a thrust cylindrical roller bearing... This is a thrust needle roller bearing...
...This is a seated insert ball bearing...This is a thrust tapered roller bearing..."