big country car

"It's really fast."

"Yes, look at it like this, it can be installed before dark."

"That's for sure. This competition will not last overnight. These people are not only fast, but also very familiar with every assembly step! See? It's finally time to install the piston."

"By the way, the assembly of the piston rings is very particular. If the piston rings are not installed properly, the engine oil will be spilled." Everyone is talking about the gap between the two rings at [-] degrees, and what is two lines up and down. Oil ring reverse dress or something.

In everyone's eyes, I saw Sun Bingwen take out the piston heated in the water. He wiped the surface of the piston with a piece of cloth, and then quickly aligned the piston pin with the hole of the piston pin seat, and inserted it firmly. , Then, plug the connecting rod in, hang it on the pin, and install the circlip.In this way, a set of piston connecting rods is assembled.

Then came the second group, the third group, and the fourth group. After these were assembled, Sun Bingwen touched the temperature of the piston with his hand, and then went to assemble the others.

"Why don't you continue to install piston rings?" Someone asked.

"The piston is still hot now." The person on the side said: "Installing the piston ring now is definitely not a good thing. You must have never read the installation tutorial."

"I'm a tire installer, why did I only read the engine installation tutorial?"

Amidst the discussions among the people around, Qin Shaoyou also started to attack the Pistons.

Qin Shaoyou first installed the cylinder, put the cylinder in place, installed the crankshaft, and then placed the cylinder horizontally on the workbench. After all these preparations, he began to pick up the piston.

"His piston is not heated, so it is not suitable to install the piston pin in this way." Someone started to discuss again: "Installing it in this way may cause unexpected wear and tear, which does not meet the technical requirements of Germany."

In the eyes of everyone, Qin Shaoyou continued to open his treasure box, and then took out a shiny thing from it. When he saw this thing, everyone was a little surprised.

"Is it ice cubes?"

"He also put a curling bottle in this box?"

"What is he doing with the ice cubes?"

In the surprised eyes of everyone, Qin Shaoyou put the ice cubes in the aluminum alloy lunch box, which was just the right size, and then threw all four piston pins into it.

Carl opened his eyes wide again: "Cryogenic assembly?"

Santana's engine uses a fully floating piston pin, so it is very inconvenient to assemble it directly. If it is a roadside store, just smash it in. However, in the factory, there is a strict production process.

They have to heat the piston first, so that the piston pin seat hole is heated and expanded, which is convenient for installation.

Qin Shaoyou didn't heat the piston because it was too troublesome. He chose low-temperature assembly, threw the piston pin directly into the ice, and let the piston pin shrink at low temperature. As long as it shrinks by [-] mm, it is enough.

The low-temperature assembly of this kind of engine has already been proposed, but because it is too complicated, various automobile factories have not really implemented it, but now, Qin Shaoyou actually started a low-temperature assembly in a simple way! (I would like to say something here. In some clichés, it is said that the whole engine is assembled at low temperature. As long as you go to the engine production workshop to see it, you can know that this is a rumor. Do assembly workers have to wear down jackets to work? Actually , that is, a few components are assembled at low temperature.)

Freezing is easier than heating, because the piston pin is much smaller than the piston!

Qin Shaoyou continued to open his treasure box, took out a shelf from the box, and fixed it on the workbench. Then, he put the three piston rings on the shelf one by one, pressed a wrench next to it, and the three piston rings It was pulled away, and then, the piston was put in, three soft beeps, the piston ring of a piston was installed, and it was done.

The tool is simple and practical, and it has the same effect as the tool just installed the cylinder liner!

The piston rings were installed on the four pistons in turn, and the cooling of the piston pins was completed. Qin Shaoyou easily inserted the piston pins into the pistons, and connected them with the connecting rods. The combination of the four pistons and connecting rods was successfully completed!

Since there is no preheating of the piston, Qin Shaoyou does not need to wait for the piston to cool down, he can directly insert the piston into the cylinder, pick up the caliper, check whether the piston is running smoothly inside the cylinder, and whether there is any partial wear, and then start to fix it The connecting rod is big.

The people around were dumbfounded. While Sun Bingwen was still waiting for the piston to cool down, Qin Shaoyou had already completed the installation of the piston connecting rod inside the engine. He saved at least 10 minutes of time compared to Sun Bingwen!

"That Qin Shaoyou, isn't he too powerful?"

"How come he has never seen those tools before? It seems that he invented them all himself?"

"Yeah, it's like a treasure chest!"

"What is the use of the ice cubes just now? Will our factory still use ice cubes to assemble the engine?"

"The German advisor seems very happy!"

In the midst of everyone's chatter, Qin Shaoyou continued to install it in an orderly manner.

Just like decorating a house, laying floor tiles and whitening the walls, the project is half done, and it almost looks like a house. When assembling the engine, just plug the piston and connecting rod in, it looks like an engine .

Qin Shaoyou's movements were not nervous at all, and looked relaxed, but the installation speed was very fast.

The rocker arms are in, the valves are in, the camshafts are in place, and the cylinder head is on!

Sun Bingwen on the side was anxious.

Originally, Sun Bingwen was looking for stability. Not only did he want to complete the installation, but he also had to make the engine flawless. After all, the factory provided them with the parts of these six sets of engines, not for them to use them for practice. After assembly, it will be installed on the car and sold.

However, when installing the cylinder liner, Qin Shaoyou fiddled with a special device, which surprised Sun Bingwen. However, he saved face by relying on his magic hammer, and did not check much in time.

However, when Qin Shaoyou started to assemble the piston connecting rod, he accelerated the speed. Qin Shaoyou changed the conventional installation procedures and used various self-made tools to complete the installation quickly. Sun Bingwen was not calm.

He installed the piston into the engine, and didn't have time to check whether it was out of cylinder. He just pushed the piston and felt it with his past experience. Even if it was installed, he had to save time and surpass Qin Shaoyou.

A master who has been in the factory for more than 20 years is actually no better than a novice who has been in the factory for a few months. If word spreads, he will lose all face.