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This involves a deeper concept. The conclusion drawn by the predecessors through countless computational efforts and practices is that the weld should be as close as possible to the neutral axis to reduce bending deformation.⊥

The most interesting thing is that the weld is not a visual weld, but a physical sense. As for the welding of fins and round tubes, the weld is angled, just 45°.

If horizontal welding is performed, the neutral axis at the weld is a straight vertical line, which obviously crosses.

For 45° welding, the neutral axis at the welding can be exactly equivalent to the surface tangent of the circular tube, and is also 45° inclined. Because it completely overlaps, it achieves an excellent position with the least distortion and deformation in theory.

Although the above theory does not transcend high school physics, even college physics has not linked it together, so Wen Tianming is absolutely unable to understand. Not to mention Wen Tianming, Zhang Yifu himself cannot understand the theories he wrote.

In this way, the 45° inclined welding proposed by Chang Siping is absolutely scientific, so what else is there to argue?

No, we must fight. Science cannot explain all problems, so we need experience; law cannot eliminate all crimes, so we need police; studying hard is not destined to be able to improve every day, so we need to flatter or study and reincarnate.

Wu Qiang is a person who has experienced actual production and has been the top technical leader of a factory. If each production step is carried out in the most theoretical and best way, the people in that factory will be exhausted. Operators always have to weigh the cost and quality, and always have to maximize their benefits. Inclined 45° welding requires fixing the pipe to the bracket for welding. The test for welders is extremely great. In order to ensure the symmetry of the fins on both sides, many work difficulties and time must be added.

Therefore, he found it difficult to accept this plan. He believed that if the horizontal symmetric welding is proficient in the workers and the welding of the fins at both ends is completely synchronized, the result can meet national standards and does not need to be so complicated.

Chang Siping repeatedly emphasized that he had done experiments and it was impossible for the existing materials and equipment technology to meet the standards.

Wu Qiang also said, I personally check our work, our people are fine, and they are OK.

Chang Siping said again, don’t you believe in science?

Wu Qiang also said, don’t you believe in practice?

In the end, the conclusion given by Zhang Yifu was placed in front of the two.

You two have no chance, you have to listen to me.

This is the most shocking thing about the two of them when they saw Zhang Yifu's piece of paper.

Zhang Yifu not only heard their argument, but also seemed to have practiced it personally. He used horizontal symmetric welding and 45° oblique welding to conduct the test. Not only did he compare and check the results, and gave a series of precise inspection data. It was dazzling and dizzy.

First of all, horizontal welding, the full length is bending and deformation is 36mm, the wave deformation is 13mm, and the twist deformation is 6mm, and all three numbers do not meet the standards. Wu Qiang, you can die.

Then there is 45° inclined welding, the full length is bending and deformation to 6mm, the wave deformation is 12mm, and the twist deformation is 4mm. The scientific theory can indeed stand the test. Unfortunately, the wave deformation still does not meet the national standards.

Of course, this is not the end of Zhang Yifu's "Magic Paper". In the end, he proposed "groove diagonal welding", which is the legendary plan 3.

Through his self-written conclusion, the result of inclined welding is still good, but the wave deformation slightly exceeds the standard. So in order to reduce this deformation, we can open a small groove of some size on the fins. From a scientific point of view, this is equivalent to changing the local stiffness of the fins, thereby reducing the restraint and reducing the amount of deformation. In human terms, it is just too crowded. If you buckle the seam and squeeze out the excess force, don't let the entire team twist.

Regarding the slot interval and slot specifications, Zhang Yifu also gave very detailed numbers.

Chang Siping, who has seen all this, is completely difficult to understand. If these numbers hadn't looked too real and professional, he would have torn this damn piece of paper long ago and pulled a bird around as an outsider.

But under the background of these numbers, Chang Siping did not have the courage or courage to tear it up again. Practice is the only criterion for testing science. It seems that this person has practiced it! How can those who do science be denied casually!

After nearly ten minutes of reading and thinking, Chang Siping was floating all over. He finally slowly lowered the paper and looked at Wu Qiang opposite him.

Wu Qiang was also looking at him with the same expression.

"Experience!" the two spoke at the same time.

In fact, they are both convinced and dissatisfied.

I admire Zhang Yifu's theory, which is impeccable.

It is his theory that is not convinced, why is it so true?

So are you convinced or not?

Talking about facts, design according to the specifications of paper, weld the three types of reversals in a group, and you will know it by trying it!

The two of them were really stubborn before, and there was no conclusion to argue like this, and it was long time since they tried it.

But whether you obey Zhang Yifu's theory or not, both of them completely obey Zhang Yifu.

Wu Qiang has long heard of the ambiguous relationship between his family and a young young cadre in the system. The strength of this young director is far beyond his expectations. He even has no doubt that the director is too lazy to be the director in the future and will be impeccable in everything he does.

Chang Siping has infinite hope for the younger generation. Judging from what is happening in front of him, geniuses are often beyond people's understanding. They complement each other in the field of science. Zhang Yifu has reached this level at a young age. It's a pity that he entered the career of officialdom... Of course, he can also change his ideas, that is, Zhang Yifu stole the finished design drawings, test data and process flow in some way...

No matter what, Zhang Yifu's piece of paper has greatly touched the theoretical and practical schools. If his data results are not wrong, as long as the difficulty of fin welding is determined, the rest of the problems will no longer be a problem.

The rest of the people suddenly became refreshed when they saw the two of them getting frown and frustrated, and were surprised and confused. Especially the two students led by Chang Siping, did the tutor take too much medicine today?

"You two, let's take a closer look." Chang Siping breathed a sigh of relief, leaned against the back of the chair, lit the paper, "Not to mention whether the data is accurate. When you do the paper and write the experimental part, this is a good sample."

Thesis! Isn’t the project we are working on this time the topic of the graduation thesis?

Has this piece of paper been finished?

The two students rushed to read. It seemed that the tutor liked this style. No matter what or not, he had to learn it according to it when he published his paper.

Although Wen Tianming has become accustomed to Zhang Yifu's ability, this time the prophet of the uncertainty has also come to him. It is comparable to Zhuge Liang's trick. He left a piece of paper a few hours ago. At this moment, when he was in a stalemate, he was completely convinced!

"Someone is already walking in front of us." Chang Siping looked at Wu Qiang, who was like a arch enemy, and shook his head with a smile.

"Haha, I am still only at the deputy director level." Wu Qiang spread his hands, savored the limited voice, appearance and smile left by Director Zhang, and sighed sincerely. "Sure enough, I have the ability."

While admiring, he turned around and said, "Article, what else did Director Zhang say?"

Wen Tianming shook his head: "Nothing."

"Why, Director Wu still doesn't think it's enough?" Chang Siping teased.

"Enough, enough." Wu Qiang smiled, "but in front of knowledge, I will never feel enough."

"Yes. I remembered a very interesting sentence." Chang Siping sighed, "Keep hungry, thirsty, keep stupid."

In human terms, this sentence means never think you are awesome, learn and think slowly.

Chang Siping suddenly felt that this should be the attitude of facing Zhang Yifu, keeping hungry, thirsty, and keeping stupid.

In fact, these two people are really thinking too much. For Zhang Yifu, this time his behavior is equivalent to drawing a picture of an unknown oracle bone inscription, and he didn't expect to play any role.

After all, it is difficult for Zhang Yifu to help in specific production technology and process. Copying two related theoretical materials may be thrown over. It is best to use it, but it is not worth it. Anyway, it is his own factory and his family.

So when he heard the two start talking about horizontal welding, oblique welding and other bird singing, he also used this as a clue to pick two paragraphs, which happened to resolve the dispute between the two.

As for why I didn't propose it at that time, but asked Wen Tianming to take it out in a few hours, the reason is very simple...

Because Zhang Yifu himself didn't know what this was, Wu Qiang or Chang Siping just asked for a little detail and he was speechless, and he had to explain the source of the data, etc. Zhang Yifu didn't know how to say a word, and he didn't have the energy to study or lie.

Just keep mystical and hide my achievements and fame. When you have questions, I have left with ease, leaving only the technology in the workshop.

Judging from the results, it was just right to do so.

The others raised countless questions in the face of this piece of paper, but no one was present, so they had to give up. Wu Qiang formed a unified opinion with Chang Siping this time, and first did it well. No matter how Zhang Yifu came up with these, he would go to the workshop to start welding and speak according to the results.

After all, this is a super shortcut that Zhang Yifu outlined for the two, and you just need to verify whether it works.

The team was about to go to the workshop and use the only sample fins and pipes to test. Wen Tianming was really exhausted and took the opportunity to leave.

Just as Wen Tianming left, Wu Qiang had time to summon the old welder, the young man in the office rushed into the conference room with an anxious look on his face.

"Manager, Mr. Xiang is back!"

"Oh." Wu Qiang waved his hand casually, "It's okay, I've explained it to the president. Just arrange and report the subsequent matters normally. She won't keep an eye on it all."

"No... she came back from the car! She just got off the car! She said Director Jia had come to inspect!"

"Director Jia? What Director Jia?" Wu Qiang hadn't reacted for a while.

The young man quickly said, "It's Director Jia of the North China Bureau! Director Zhang and his official director of the Energy Saving Office!"

Wu Qiang was shocked and almost fell off his chair: "Jia... Jia Tianyun? The one who had just been transferred to the North China Bureau?"

"Yes, they should have already walked here." The young man wiped his sweat.

After a long time of frost, Wu Qiang finally reacted and shouted: "Hurry! Hurry! Call the factory leaders! Welcome! Change tea! Change water!"

Chang Siping opposite frowned, afraid that the trouble would come.
Chapter completed!