Nguyen Fogan once again asked Sun Guohua to confirm that Du Xiaodi is one of the two Songjiang electric welders that Sun Guohua said is "technically", and Du Xiaodi also showed Nguyen Fungen his certificate of training in Japan, which made Nguyen Fungen a few points in his heart.

Because of the tight time of the mission, Nguyen Fugen did not dare to delay, and immediately returned to Hoi An with Du Xiaodi.Bi Jianxin heard that Nguyen Fugen had invited a new welder, and the arm that had been hanging plaster had also come to the workshop.After seeing the appearance of Du Xiaodi, Bi Jian's new ideas are the same as Nguyen Fugen, and they all feel that Du Xiaodi is playing with everyone."Welder to be small" this sentence is everyone knows, but did not say that a 20-year-old girl can be alone ah.This is a welding type two pressure vessel, not soldering iron, steel pipe and the like, welding quality is not off, these containers under high pressure will crack, it is not a joke thing.

Don't worry, Master Bieber, I understand that."Du Xiaodi put on a welded overalls, stood in front of Bi Jianxin and Nguyen Fugen, and said with an understatement.Just like this kind of pressure vessel common sense, the old man in front of her noisy for half a day, are you sure that Tongyuan boiler plant is smaller than your will be chemical machinery factory?

“If not, you’ll weld something else first, and let me... uh, and the director of the Nguyen factory to see?”Bi Jianxin said.

Du Xiaodi: “It’s not necessary, is it?”Didn’t the mayor say that time was tight?In this way, I first go to weld a seam, Master Bi to see the qualified qualified.If I am not qualified, I will go immediately, and I will pay for the road and the accommodation in Hoi An.

"This..." Bi Jianxin was speechless, people came to help, it is said that even the remuneration did not mention, do you choose such a choice, is it too inhuman?However, how is this little girl's technology, she is not clear at all, can let her be soldered directly on the equipment?If there is no welding well, the loss is not only time, but also the semi-finished products that have been built, after all, the welded things want to make up the welding, the trouble is much more.Is it enough for her to pay for her own roads and accommodation?The loss of the factory, who will bear it?

"Forget it, Master Xiao Du is right, time is precious, let's start welding."Nguyen Fung-en made a decision quickly.He thought that the people recommended by Sun Guohua should not be so unreliable.According to Bi Jianxin, first let Du Xiaodi weld a few pieces of waste materials to try their hands, and then let her drill into the container to weld, is undoubtedly more safe.But doesn’t that seem to distrust this little master?If people really have a little ability, because of their distrust and walk away, they can catch themselves blind.

Thinking of this, he also went out, not a heat exchanger, no big welding broken, do it again, that is, hundreds of thousands of things.

Du Xiaodi is also interested in raising the bar with Bi Jian.People say that they want to test her technology, which is actually a reasonable requirement.But Du Xiaodi has her own ideas, and she feels that she has already presented Nguyen Fuggargan with a training certificate in Japan, which is enough to prove her level, and it is completely unnecessary to do such a school.In addition, Bi Jian's new technology is not as good as her, what qualifications does he have to be able to test himself?

Listening to Nguyen Fugen agreed, Du Xiaodi smiled slightly, carrying the welded pliers and drilled into the narrow heat exchanger.Pressure vessels are all one jar or large cylinders, and many welding work is done inside these containers.Du Xiaodi is small in size, and drilling this jar has more advantages than male workers.

“Attention, it has begun!”

As Do Xiaodi issued a command in the container, everyone became nervous.Through the observation port of the container, Nguyen Fuguan and Bi Jianxin can see the arc glitter inside the container, and a burst of rata sound comes from the welding point.

"Yes, the craft is very skillful."Bi Jian's new side ear listened to the sound of the arc, and nodded with satisfaction.This is the skill of the expert, he does not need to look with his eyes, as long as he listens to this sound, he can imagine the welding situation.This arc sound is continuous, the tone is uniform, there is no ups and downs, and the movement of the solder is very stable, which fully shows the operator's precise control ability.

“How did the solder stop here?”

As he listened, Bi Jian’s new brow frowned and asked incredulously.

"What?Moved to top, wouldn’t that be a jerk?”Nguyen Fugen also heard, the sound of the place, clearly from the bottom along the side to the top, should now be in the state of sterning.

Most of the chemical containers are spherical or cylindrical, and the heat exchanger is a large cylinder, which is processed flat on the ground.A weld that surrounds the cylinder for a week naturally includes half of the back welded.Welding is a very complex skill, with the new ability to build, and dare not say that it is very refined.

In the past, when they welded this ring-type weld, they took a step-by-step approach.That is, the weld is the part below, after welding, the welder comes out of the container, and other workers help to rotate the container 180 degrees, so that the part that needs to be welded is transferred to the bottom, and then the welder enters to continue welding.

This is, of course, a comparative insurance approach that avoids the use of technology-demanding methods, thereby reducing the risk of errors.But at the same time, the manufacturing time has increased significantly, the welders go in and out, and the container is rotated, which takes time.If there are several ring welds, this work will be repeated several times, and the accumulated time is very considerable.

Some people may say, why not weld all the welds on one side, and then turn around and weld the other side.This is a matter of process design.Just like screwing when assembling, you can't tighten one side first, and then screw the other side, because this will cause uneven forces on both sides, and the assembled workpiece is skewed.

Just now heard that Du Xiaodi has finished welding the welds below, and the workers standing outside are ready to wait for Du Xiaodi to come out, and then use the crane to turn the heat exchanger around a circle.Who would have guessed that Du Xiaodi did not use this trick at all, and she directly used the welding method.This hand, in Nguyen Fugen and Bi Jianxin they seem to be extremely shocked, for Du Xiaodi is a regular meal.

Tongyuan Boiler Factory is a national key enterprise specializing in pressure vessel manufacturing.As Du Xiaodi said, the second type of pressure vessel for Tongyuan boiler plant, belongs to the need for Du Xiaodi such a senior welder to shoot the product, she and her master, brother and other only responsible for the welding of three types of containers.Due to the many production tasks, they can not rely on turning products to avoid welding like Nguyen Fungen's factory, otherwise they will not want to complete the task.For these people, welding is basically a basic skill, when she drilled into this heat exchanger, she thought that she would come out in the middle of the container to rotate and then weld, is this not too much?

“This is the standard welding method!”Bi Jianxin almost put his ear to the heat exchanger, he only hates the heat exchanger space is too small, he can not get into the style of Du Xiaodi, can only rely on listening to the sound to imagine the inside operation.

Simply put, welding is to use the arc to melt the metal on the contact surface of the two workpieces, and it will be integrated after solidification.Metal melting forms an area of liquid called a melting pool.The difficulty of oversolding is that the melt pool is suspended in the air, and the liquid metal will fall down due to gravity.The trick of welding is to quickly intermittent arc and oblique, and only melt one thin layer of metal at a time, so that it is too late to fall and is already in a semi-solidified state.

During this period, the rhythm control of arcing and arcing is very important, without a thousand practices, coupled with good understanding and a stable mentality, it is difficult to do.Bi Jianxin listened to the chicks pew rice in the heat exchanger and generally fast and uniform arc, you can guess that Du Xiaodi in the arc and the arc between the skilful transformation, this is such a wonderful way ah!

"Well, Mr. President, please check on the wounded master."

Without waiting for everyone to slow down from the surprise, Du Xiaodi has completed the operation of a weld and drilled out the heat exchanger.She put down her welded pliers and mask, took off her gloves, and smiled and said to Nguyen Fugong.Looking at her relaxed look, it seemed that she had just completed a difficult welding, but where to drink a cup of tea.

The flaw detector carrying the flaw detector was about to drill into the heat exchanger, only to see the shadow flash, Bi Jianxin rushed in front of the drill.He was tall, and one hand was still playing plaster, but the movement was very quick, and everyone was startled.

“Awesome, very awesome!”

Less in an instant, the heat exchanger came out of the excited praise of Bi Jianxin, and then he came out of the heat exchanger, and he could not afford to wipe the iron crumbs and dust on his face, but said loudly: "Don't look, it must be a level, I have never seen such a beautiful weld!"It's great!"

Hearing Bi Jianxin say this, Du Xiaodi, who had just been on his face, was embarrassed.In fact, she is a very low-key person, who has shown strength in front of Bi Jianxin, but she is not angry with Bi Jianxin for her little.Now seeing the new age of Bi Jian praised her so much, she was somewhat unbearable.

"Master Bie, you have won an award, in fact, this is nothing."Du Xiaodi said.

The flaw detector is still dutifully drilled into the heat exchanger to do the flaw detection, which is a necessary procedure, and Nguyen Fuguan will not save this step by trusting Du Xiaodi or Bi Jianxin.Bi Jianxin looked around, found a cup of water, picked up the kettle and poured more than half of the water, and then put his hands on it, came to Du Xiaodi, respectfully raised the cup, said:

"Master Du, I have an old eye that I don't know Tarzan, and I have offended a lot just now."If Master Du does not care, can you take me as a student and teach me this method of welding."