Chapter 344: Install the bearing

Most bearings are installed using the press-in method. If the inner and outer rings of the bearing are to be installed on the shaft and the bearing seat at the same time, it must be ensured that the same pressure acts on the inner and outer rings at the same time, and must be on the same plane as the contact surface of the installation tool.
This requires a special hydraulic press for installation. In the factory, there should be many such tools, but now, Zhang Xiangyang is seriously lacking in tools.
Without special equipment, this bearing cannot be installed. As for buying equipment now? That is impossible. You must know that many factories have entered the New Year mode, and it is impossible to accept orders.
How to do?
Zhang Xiangyang’s face is ugly, starting a business on his own, this road is really difficult to follow, all kinds of problems are in front of us, before in the factory, what is missing, just make a report, can’t start work, don’t worry, anyway, the salary is the state Financially allocated.
But now, you have to deal with everything yourself.
"Is there no other way?" Zhang Xiangyang said, "Everyone is a master, let's get started with native law?"
When there is a lack of tools, you can use the native method. Zhang Xiangyang asks everyone that, as a master, of course there are ways.
"The bearing can be heated first." Master Du said: "After heating, we can install our steering shaft inside."
A very simple principle, heat expansion and cold contraction, as long as it is heated, the inner port of the bearing will become larger, and then the steering shaft can be installed.
"After installing the inner steering shaft, we can use a hammer to smash the outer edge of the bearing into the steering gear housing."
The bearing is installed on two sides, the inside is connected with the rotating shaft, the outside is connected with the shell, the inside is heated, and the outside is directly violent.
However, this installation method will damage the bearing.
As a master, Master Du knows that, generally speaking, the heating temperature of open bearings should not exceed 120 degrees Celsius. Bearings with seals and dust caps are not even allowed to be heated above 80 degrees Celsius.
At this temperature, the effect of thermal expansion and contraction is still very small, almost the same as no heating. This process is to install large bearings, heat them slightly, and then press in with a hydraulic press.
But now, if you want to directly heat the bearing, the temperature is not a few hundred degrees, which is absolutely useless.
"Now that I know it, what are you doing in a daze?" Zhang Xiangyang said, "Hurry up and get to work!"
Work! Master Du put on his face mask, thick gloves, holding a welding torch in his hand, and gestured to his companion.
Another companion's hand struck a match and stretched it toward the head of the welding torch. In an instant, a hot flame burst out.
Acetylene oxygen gun, this is a common workshop processing tool. Now, after Master Du lighted the gun, he began to move towards the bearing.
The hot flames are baking the bearings. As a master, Master Du knows that when heating the bearings, they must be heated evenly, and there must be no local overheating.
Therefore, it must be heated continuously while shaking.
At the same time, when the heating temperature exceeds 727 degrees Celsius, the phase transformation temperature of the bearing steel is reached, and the metallographic structure inside the bearing steel will change. When the bearing is cooled, the inner bore of the bearing cannot be restored to its original size, which is usually larger than the size before heating.
In this way, the bearing becomes loose.
The theory is very simple, but in practice, who knows how much it has reached!
"Come, try." Master Du shouted.
Another master picked up the steering shaft and tried to plug it into the bearing, but the plug stopped moving immediately.
"No, continue heating!"
Master Du can only continue baking.
"try again."
"Not yet!"
This is to bake the bearing out! Master Du frowned, then heated it until the bearing was about to turn red, and then it was easily inserted into the steering shaft.
"Okay, the installation is complete, next one!"
With this first successful experience, then, the rest of the installation, it will be the same.
Master Du, it's a cow!
Zhang Xiangyang watched his staff work. After installing the steering shaft, when it cooled down, he started to stuff it into the steering gear housing.
How to stuff? Hard stuff, just work with a hammer!
"Bum, bum, bum!" Hammer after hammer continued to smash down, finally, the bearing was knocked in.
Then, the gears were installed, and the workers and masters worked together. Before dark, more than fifty were assembled.
Seeing the sun gliding to the west, Zhang Xiangyang was very satisfied: "Come on, everyone, let's work for a few more hours."
"Still doing it?" Suddenly, some people were dissatisfied.
"The factory is in a hurry. Everyone is working overtime. You can go back if you do 100 pieces today. For me, I have to go to the factory to deliver. Tomorrow, we will try to assemble two hundred and the day after tomorrow. Well, we'll finish the work and we can start the New Year. Anyway, these tasks are done early, so we can go home early for the New Year!"
Zhang Xiangyang had his own considerations in his mind. At that time, Factory Manager Wang said that he should pay attention to quality. If the quality is not up to standard, he would refuse to accept it.
Although he patted his chest to guarantee, but now, looking at the installation method of this bearing, I don’t know whether the quality is qualified or unqualified, but now, there is no other way. If he does not assemble it quickly, he will still breach the contract, and the liquidated damages. Enough to squat in prison for the rest of his life.
Can only rush out!
In this case, it is best to deliver the goods in the middle of the night. Anyway, there is no rest day and night in the factory, and if this batch of goods is sent over, maybe it can be loaded.
As long as the car is installed, what else is there? If there is a problem in the future, do they deliver the goods themselves or they produce them themselves? At that time, no one can tell, you can put aside the relationship.
I am not a pit factory, I am just because of time constraints. When the first batch of goods is sent out, I get the money, I can relax myself. Next year, I can purchase various equipment by myself, and I can come to a higher standard. Produced.
Well, the next is not an example, the next is not an example.
Zhang Xiangyang comforted himself like this.
Although the workers have opinions, as long as they finish these few days, they will be able to celebrate the New Year. They will be expelled from the factory. If there is no Zhang Xiangyang, they will have no money for the New Year, so they still have to work.
The night was getting deeper and deeper, and finally, at twelve o’clock in the evening, the workers yawned and looked at the steering machines all over the floor:
Okay, it’s more than a hundred. Let’s go home and rest. tired!"
We are skilled workers, not porters. How to transport these hundred sets of steering gears to the factory is not what we want to do.