"This brings us to the second reason." Lin Feng paused, and then continued:

"There are two main types of lasers used for laser welding, namely CO2 laser and Nd:YAG laser.

Among them, the beam generated by the Nd: YAG laser is mainly near-infrared light, with a wavelength of 1. 06 lm, a thermal conductor absorbs light at this wavelength and has a reflectivity of 20% to 30% for most metals. With the use of a standard light mirror, the beam in the near-infrared band can be focused to a diameter of 0. 25 mm。

The beam of the CO2 laser is far-infrared light with a wavelength of 10. 6Lm, most metals reflect 80% to 90% of this light.

This HBC-115 handheld laser welder uses Nd: YAG laser, because the reflectivity for most metals is very low, so the laser frequency has little impact on welding.

However, the material of the neuronal transmission electronic board is titanium-nickel alloy, and the reflectivity of this alloy is 75% under the Nd: YAG laser, and during processing, there will be serious astigmatism and backlight, and because of the influence of laser frequency, the impact of this astigmatism and backlight on the welding quality is infinitely expanded, so there will be an ultra-high rejection rate. ”

"Oh!" After Lin Feng's explanation, the people present were enlightened and suddenly realized.

Even if you don't have enlightenment, you have to pretend to be enlightened, this kind of person...... For example, Zhao Yong next to him.

His expression was exaggerated, as if he had stuffed an egg in his mouth, and it seemed that he had understood more thoroughly than others.

"Then Mr. Lin, how to solve this problem? Is it equipped with a special light mirror to focus the beam to a diameter of 0. 75 - 0. 1mm？ ”

Lin Feng nodded and shook his head again.

This statement made the technical directors incomprehensible.

What does Mr. Lin mean by this?

One of them was about to ask a question, but Lin Feng walked up to the HBC-115 handheld laser welder and gave an answer at the same time.

"Not only do you need to configure a special light mirror, but you also need to adjust the rated voltage frequency of the machine."

Adjust the rated voltage frequency of the machine? A group of tech leaders disagreed.

The rated voltage of the machine, how can it be adjusted by adjustment?

If Lin Feng's solution is to add a current stabilizer and adjust the electrical voltage frequency of the machine to 60HZ, it will be more convincing.

But without waiting for this group of technical experts to question, Lin Feng directly entered a series of numbers on the CNC panel of the machine, and then opened the maintenance port next to it, and opened the five empty wires and connected them together.

Several technical directors came around, only to see that the appearance of the CNC panel has changed, it was still the English version before, and now it has completely changed to East Korean characters.

What's going on? What's changed?

Moreover, what do those East Korean words mean.

However, among several supervisors, there are still capable people, and he stood up to explain:

"This is the machine's back-office maintenance panel."

Maintenance panel, this word is not unfamiliar to several technical supervisors, all foreign machines with a little technology, all hidden this panel.

One is for technical confidentiality, and the other is for technical maintenance.

To put it simply, the machine manufacturer deliberately left a hand in the machine operation background.

If the machine fails, the maintenance personnel sent by the manufacturer can use special means to call up the maintenance panel and enter the password to view the problem of the machine.

Lin Feng can call up the maintenance panel, these supervisors are not too curious, after all, the HBC-115 handheld laser welder is not the world's top equipment, and the unlocking method of the maintenance panel can be found through special channels.

But.....

"Mr. Lin, how do you know the maintenance password of this machine?"

"I don't know!" Lin Feng replied casually, and entered a number on the maintenance panel with his hand, adjusting the rated voltage frequency of the machine to 50HZ.

"Don't know? How does that use the repair panel? ”

This technical director asked the questions that everyone cared about.

Lin Feng closed the maintenance panel, separated the five threads at the maintenance port again, and motioned to the others: "These five threads are the password." Once connected, they form an unstable weak current circuit in the main control panel, which unlocks the maintenance panel password. ”

"Of course, these five wires were specially added after the machine was installed, just for the convenience of maintenance, but I was busy at the time and forgot to adjust the rated voltage frequency of the machine."

This statement is really eye-opening, but when everyone thinks about it, it makes sense.

Just like a lock, you don't have to hold a key to open it, as long as you find the trick, an instant noodle can be pried open.

But Lin Feng said it easily, but the key to the problem is how to find this trick.

This machine, there are hundreds of lines in it, and it is necessary to find the line that can unlock the password among these hundreds, unless it takes a lot of time to conduct a rigorous permutation and combination test, and this kind of test, there is a high probability of accidents.

At worst, the machine circuit is short-circuited, the instrument is damaged, and the high-voltage leakage can cause the experimenter to be electrocuted, or an optical explosion will occur, bringing irreversible damage to the experimenter.

No one is so crazy to carry out this kind of test, because the difficulty and danger of the test are similar to the Nobel Prize test of explosives.

But everyone glanced at Lin Feng and immediately changed their minds.

Well, there are still people who are so crazy.

But in fact, Lin Feng is not as crazy as everyone thinks, everything is forced by life.

In order to make the [Sword of the Sky], many precision parts have to be handed over to the processing plant to do, these mecha parts, there are also this kind of electronic boards, which need to be processed by HBC-115 handheld laser welding machine, but this kind of machine is rarely purchased by medium-sized processing plants, Lin Feng ran more than a dozen before finding one, but this HBC-115 handheld laser welding machine is also out of order and cannot be used.

If you want to repair, you have to find the manufacturer of the machine to send someone to repair, you have to spend money, at that time it was in the cold winter period of machinery production, the factory director was not willing to spend money to hire someone to repair a machine that was not very useful, unless Lin Feng could increase the price of parts processing by 50 percent.

But Lin Feng was even more short of money at that time, but the parts couldn't be dragged all the time.

So he communicated with the factory director, and then stayed alone in the processing plant for a whole month.

In that month, Lin Feng only ate one meal a day, and many times it was instant noodles, and he stayed in the factory for food and lodging, and studied the HBC-115 handheld laser welding machine day and night.

The factory director couldn't stand it anymore, so he asked the canteen to prepare meals for Lin Feng every day, one meat and one vegetable, and let Lin Feng make up for his body, he didn't want to see Lin Feng starve to death in his factory.

But Lin Feng directly said that he was not interested in the food, so he changed the canteen to steamed buns.

The factory director was puzzled, how could there be southerners who didn't like to eat and like to nibble on steamed buns, an accident, he saw Lin Feng holding an electric pen in his left hand, a wrench in his right hand, and half a steamed bun dyed with engine oil in his mouth, engrossed in the drum machine, he instantly understood.

........

Success is never accidental.

It can be said that it was that month that Lin Feng understood the size of each part of the HBC-115 handheld laser welding machine, the use of each line, and the principle of every diode and triode.

Now Lin Feng, not to mention the maintenance of HBC-115 handheld laser welder, even if he builds one, it is also a matter of hand.

But in the past of these Lin Feng, the people present didn't know, and now in the eyes of several technical directors, Lin Feng is simply a god.

If you put it in the Three Kingdoms, it is a big bull who can sit on an equal footing with Zhuge Liang.

Bang Bang Bang .....

I don't know who it was, so I started to applaud, and then the others also came to their senses, and suddenly, the whole factory applauded.

After buying medicine, Zhao Feifei, who was looking for the factory, happened to bump into this scene.

Looking at Lin Feng who was surrounded by the crowd, like the stars holding the moon, there was a hint of obsession in her eyes.......