No wonder Teacher Tang and the others were so unconfident. It was because the lathe renovation steps hosted by Guan Fei were too big, which made them a little worried.

Technology is always improving, and domestic companies also need to carry out technical transformation from time to time, but most of the investment is only a thousand yuan. If Guan Fei invests 6,000 yuan in a single machine tool at one time, it is almost like a desperate bet. If the technical transformation is not successful, the host will bear important responsibilities.

Of course, Guan Fei himself is the highest person in charge of the 291st Brigade. Even if his technical reform fails, no one can hold him accountable.

But from the perspective of Teacher Tang and others, this is a great success. The theory is very good, but no one dares to be too optimistic whether it can be done or not.

One thing they admit is that Guan Fei’s courage is indeed very strong.

This time, the C616 is modified into a CNC lathe, involving several key components: the power system, the conduction system, the advance and retreat system, and the tool change system. It can be said that the original C616 was broken and completely dismantled. After replacing the new parts, a new lathe was reassembled.

The assembly of the automatic conversion knife system that Guan Fei first performed was eye-opening to these theoretical schools.

"The following is the assembly of the knife change system. This is a very meticulous job and requires full attention. I must focus on my work and cannot answer everyone's questions for the time being. Please keep quiet so that I can concentrate all my attention." Guan Fei greeted everyone before the start.

Then, he first asked to click all the parts one by one, put them in front of him, and then closed his eyes, as if he was adjusting his breathing.

Guan Fei's behavior also made Teacher Tang, who was watching and studying, look solemn, and he involuntarily lowered his breathing to avoid disturbing him.

They noticed that as Guan Fei gradually adjusted, his breathing became more stable, and the front and back intervals gradually became consistent.

After two or three minutes, Guan Fei slowly opened his eyes and began to assemble the scattered parts into a whole.

In the eyes of Teacher Tang and others, this process felt very slow, and each step took several minutes. Moreover, Guan Fei's body movements seemed to become quite stiff, and the speed and amplitude of movement were like a machine, smooth and the interval was the same!

"What a stable hand! Even a machine is just like this!"

Although they did not dare to make a sound, such admiration surged in their hearts. Affected by this, they lowered their breathing even more. Some people even covered their nostrils with their hands, as if they were afraid that a little larger airflow would interfere with Guan Fei's movements.

But this is a little too slow.

Do they think assembly is nothing more than putting together a bunch of scattered parts, then using measurement tools such as vernier calipers to compare the assembly errors and make appropriate adjustments.

But Guan Fei is not like this.

He assembles a part very slowly and has a very small range of movement. He has been making extremely subtle adjustments before the parts are spliced ​​in place, and once combined, it remains as it is as it is.

When fixing, his action of tightening the screws is also very special. He does not tighten one up and then twist the second one, but twist this screw twice, and then switch to the next one and twist it twice, exerts force equally at several angles and gradually fixes it.

After twisting to the last few rounds, his movements became slower and slower. Sometimes he twisted it around and twisted it half a circle of diagonals. Or he felt that it was tighter here, and he would relax a little bit. A simple fixed work was done, and he kept adjusting it back and forth, and it took almost ten minutes to complete it.

In this process, he was always detached from the object, focusing all his attention on observing the subtle changes in the parts in his hands, without being affected by the outside world at all.

There were only a dozen parts, and Teacher Tang thought he would do it himself, it would be fine in about one or two minutes, and it would take only five or six minutes to give it a little by hand.

Guan Fei took half an hour!

"alright!"

After Guan Fei finished the last step, he carefully placed the assembled knife holder aside. The person suddenly relaxed, and the internal organs that had been stably controlled by the skin also started to run independently in an instant. Sweat was blowing out of the sweat glands of the head and face, like washing water, and instantly flowed all over his head and face.

Teacher Tang and others were shocked by his last moment and quickly handed over the towel.

"Battle Commander Guan, does assembly really require such meticulous operation? Can't you make rough installation first and then make subtle adjustments?" a teacher asked in confusion.

"Haha, it's normal for you to think so..."

Guan Fei took the towel and wiped the sweat all over his face. After relaxing his body, a strong sense of fatigue surged from his heart. He simply sat down on the ground with his feet spread apart to make his body feel more comfortable.

"The teachers are all engaged in mechanical teaching and have done considerable research on precision manufacturing. However, in actual work, the precision of the equipment is not only to see whether the parts are precise enough, but the final assembly is also a key link in the actual working accuracy of the equipment. For example, if the screw is a little tilted, it seems that there is no big problem, but with this error, after conduction and amplification, the final action may produce errors of more than ten microns or even dozens of microns.

Tightening the screws seems to be a very inconspicuous small action. However, if the screws are tight or loose, the applied pressure will have a slight impact on the fixed parts. This angular pressure is a little larger and that angular pressure is a little smaller, which cannot be seen in the early stage, but after a long period of operation, the parts may tilt towards that angle under the action of pressure, resulting in changes in errors in the entire operating system.

Foreign countries give high-level assembly debuggers a high salary because assembly debugging is too important. The more precise the equipment, the more high-level debuggers are needed. They are an extremely important part of ensuring product quality!”

He didn't say anything, that is, the country is doing very poorly in this regard.

Do you not pay attention to the final assembly and commissioning in China? Obviously not, but the attention is not enough, and it is far from reaching the level of refinedness abroad.

The same manufacturer and the same equipment may have a very different effect. One device can reach the best level of the same type of equipment that is no less than the best in foreign countries, with operational stability and reliability at all. However, the other device may have problems every few days, and repeated adjustments and repairs cannot be solved.

This is because the initial assembly and debugging work was not done well.

In the next transformation process for C616, Teacher Tang and his team have a more intuitive understanding of Guan Fei’s meticulous operational level and almost strict standard requirements.

Swish!

Guan Fei squatted next to the lathe guide rail, observed it for several minutes, and then tore off the pasted guide rail film.

Rail filming is also a new process that Teacher Tang and others only understand.

Traditional guide rails are in direct contact with two guide rails, but Guan Fei asked Sun Yaohua to bring back a batch of tetrafluoroethylene soft film from Hong Kong, cut it to a size slightly wider than the guide rail, and paste it on the guide rail as a buffer.

The knowledge taught by Teacher Tang and others was a little behind the actual situation. Later, they stayed in the countryside for a long time and didn't know what the meaning of this soft belt was. They just roughly estimated that this wear-resistant material ensures that the guide rails can run for a longer time without deformation.

"This kind of soft belt is indeed a wear-resistant material, but it is not just for this reason to use it on the guide rail. Its friction coefficient is also much lower than that of the guide rail, only one-third of the cast iron guide rail, and the kinetic energy loss is small. Because the dynamic and static friction coefficient is small, it can effectively reduce crawling during low-speed operation and maintain the stability of operation. With soft belt buffering, it can also reduce the accuracy error caused by vibration, which is equivalent to improving the machine tool processing accuracy in disguise. So this is a good thing. It has been discovered in recent years that foreign countries have begun to use it in large quantities on machine tools, precision components, and aerospace parts. With ready-made technology, why don't we use it?"

Guan Fei explained to them the role of rail filming.

"So that's the case, but why did you tear off the soft belt you posted again? We looked at it carefully, but didn't find any problems?" Teacher Tang and others suddenly realized, and felt that they had learned some new knowledge. They were very excited, but they still expressed their confusion about Guan Fei tearing off the soft belt you posted.

"Haha, because there is a bubble here! I tried it and couldn't get rid of it, so I had to tear it off and re-stick it!" Guan Fei smiled and clicked on the guide rail.

Teacher Tang and others were speechless.

When the rails at the back were reassembled, they couldn't understand them. In their opinion, Guan Fei's requirements for every detail had reached a harsh level. In many places, they widened their eyes and could not detect anything wrong. But where did Guan Fei adjust it, and it took a very long time.

They can only use different journeys to comfort themselves, but they know that this kind of comfort is wrong. They are teachers and have no practical experience in doing things. Guan Fei is still a soldier. Shouldn’t he be even less experienced?

Maybe people are really different...

Guan Fei didn't pay much attention to their changes from surprise to indifferent, and he focused all his energy on the machine tool.

In order to see every subtle change more clearly, he asked someone to surround the lathe a circle of incandescent lamps, reflecting every part of the lathe in a tiny detail.

He walked slowly on the bed, staring at the guide rails tightly, and the visual signal was transmitted to the brain, and the biological auxiliary brain was amplified to make the most detailed judgment.

He felt that there was not a complete alignment here, and there should be a little error, but after looking at it, he couldn't find the error.

What a small object that can be observed with the smallest human eye?

The public answer to this question is usually 100 microns. But in real life, people can see each hair, and the diameter of the hair is less than 100 microns. There is also silk, which is usually between twenty microns and thirty microns, but people can also pick it out with their naked eyes, which is very different from the accepted answer.

The correct answer is that the minimum observation angle of the human eye is one, so the minimum observation object is tens of microns. However, in the case of sufficient light, a person can just tilt the observation angle slightly and change the observation position, and it is possible to find things that have not been discovered before.

So in the extreme case, humans can see things with a diameter of only a dozen microns, especially this is something that is relatively long, not a point.

This kind of observation is extremely subtle and requires very keen observation and insight, which can only be achieved after a long training.

Guan Fei has the help of the biological subordinate brain, and he does not need special training. He just needs to improve his attention and make a correct judgment in a timely manner based on the information feedback from the biological subordinate brain.

Since the biological auxiliary brain said that there should be an error here, it must be that when he passed by, the frame amplitude of the visual light appeared here. However, he didn't notice it at that time, and it passed by in a flash. Now he calmed down and looked carefully, but because the misalignment was too subtle, it could not be distinguished by the naked eye.

He was not frustrated, repositioned the lights a little, then walked to the end of the bed, placed the rails in the center of his sight, and slowly moved his head.

The control of the body of the biological auxiliary brain reaches the cell level. Normal people cannot accurately judge the displacement data when they move, but with the assistance of the biological auxiliary brain, it can accurately measure the displacement information to one micron!

Saw it!
Chapter completed!