Super Weapon Swap System

Most bearings are installed by 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, there is a serious lack of tools here in Zhang Xiangyang.

Without special equipment, the bearing cannot be installed. As for the equipment purchased now? That's impossible. You know, many factories have entered the new year mode, and it's impossible to accept orders at all.

What should I do?

Zhang Xiangyang's face is very ugly. It's really difficult to start his own business. All kinds of problems are in front of him. In the past, if he was in the factory, just make a report. If he couldn't start work, he's not in a hurry. Anyway, the salary is allocated by the state finance.

But now, you have to deal with everything yourself.

"Is there no other way?" said Zhang Xiangyang. "We are all teachers. Let's start with local methods?"

When there is a lack of tools, you can start the local method. Zhang Xiangyang asked everyone. As a teacher, of course, there are ways.

"The bearing can be heated first." master Du said, "after heating, we can install our steering shaft into it."

A very simple principle: heat expansion and cold contraction. As long as it is heated, the inner mouth of the bearing will become larger, and then the steering shaft can be installed.

"After installing the inner steering shaft, we can hit the outer side of the bearing into the steering gear housing with a hammer."

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 teacher, master Du is clear that generally speaking, the heating temperature of open bearing shall not exceed 120 ℃. Bearings with seals and dust covers are not even allowed to be heated above 80 ℃.

At such a temperature, the effect of thermal expansion and cold contraction is still very small, which is almost no different from no heating. This process is to install large bearings, heat them slightly, and then press them in with a hydraulic press.

But now, if you want to heat the bearing directly, the temperature is not a few Baidu, which is absolutely useless.

"Now that you know all about it, why are you still waiting?" Zhang Xiangyang said, "hurry to work!"

Work! Master Du put on his mask, thick gloves, holding a welding gun in his hand and motioned to his companion.

Another companion's hand struck a match and stretched out towards the head of the welding gun. In an instant, the hot flame rushed out.

Acetylene oxygen gun is a common workshop processing tool. Now, master Du started to move towards the bearing after lighting the gun.

The blazing flame is baking the bearing. As an old master, master Du knows that when heating the bearing, it should be heated evenly, and there must be no local overheating.

Therefore, we must keep shaking and heating.

At the same time, when the heating temperature exceeds 727 ℃, the phase transformation temperature of bearing steel will be reached, and the metallographic structure of bearing steel will change. When the bearing is cooled, the bearing bore cannot be restored to its original size, which is usually larger than that before heating.

In this way, the bearing is loose.

The theory is very simple, but in practice, who knows how many degrees it has reached!

"Come on, 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, keep heating!"

Master Du can only continue baking.

"Try again."

"Not yet!"

This is going to burn the bearing! Master Du frowned and then heated until the bearing was going to be red. Then he easily stuffed it into the steering shaft.

"OK, installation is completed, next!"

With this first successful experience, the rest of the installation will follow suit.

Master Du, it's a cow!

Zhang Xiangyang watched his men work. After installing the steering shaft, when it cooled down, he began to plug it into the steering gear housing.

How? Hard plug, work directly with a hammer!

"Bang, bang, bang!" hammered and hammered down again and again. Finally, the bearing was knocked in.

Then, the gears were installed, and the workers and masters started together. Before dark, more than 50 were assembled.

Looking at the sun sliding to the west, Zhang Xiangyang was very satisfied: "come on, let's work for a few more hours."

"Still working?" suddenly, someone was dissatisfied.

"It's urgent for the factory to work overtime. If you work 100 today, you can go back. As for me, we have to go to the factory for delivery. We'll try to assemble 200 tomorrow, and then assemble 200 the day after tomorrow. We'll be finished and we can celebrate the new year. Anyway, we'll finish these jobs early and go home early for the New Year!"

In Zhang Xiangyang's mind, he had his own consideration. At that time, factory director Wang told him to pay attention to quality. If the quality was unqualified, he would refuse.

Although he patted his chest to ensure that, now, looking at the installation method of the bearing, I don't know whether the quality is qualified or not, but now, there's no other way. If he doesn't assemble it quickly, he will still breach the contract. The liquidated damages will be enough to spend the rest of his life in prison.

Can only rush out!

In this case, it's best to deliver the goods in the middle of the night. Anyway, the factory doesn't rest day and night. If you send your own batch of goods, you may be able to load it.

As long as the car is loaded, what else? In case of any problems in the future, did they deliver the goods themselves or did they produce them themselves? At that time, no one can tell, so you can put aside the relationship.

I'm not a pit factory. I'm just short of time. When the first batch of goods are sent out and get the money, I'll slow down. Next year, I'll buy all kinds of equipment and can produce with higher standards.

Well, not again, not again.

Zhang Xiangyang comforted himself.

Although the workers under them have opinions, as long as they finish these days, they can celebrate the new year. They are dismissed from the factory. Without Zhang Xiangyang, they have no money for the new year. Therefore, they still have to work.

The night was getting deeper and deeper. Finally, at 12 o'clock in the evening, the workers yawned and looked at the steering gear everywhere: "well, it's more than 100. We're going home to have a rest. We're so sleepy!"

We are skilled workers, not porters. How to transport these 100 sets of directional machines to the factory is not what we want to do.