Monster Factory Chapter 376: : Nuts manufactured by cutting-edge industrial technology
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Appeared in Ye Qing's eyes, it is a silver-white Standard hexagon nut.
Pinch the nut gently, Ye Qing's first reaction is that the nut is heavy.
The Standard nut with the same size is about seven grams. Ye Qing often deals with these things and is very accurate about its weight. But starting with this nut, it weighs about 15 grams.
The increase in weight indicates that this nut is made of a denser high-hard alloy.
When Ye Qing pinched the alloy nut in his hand, he aimed at the overhead crystal lamp to observe the threads on the inner wall.
Ye Qing, who had been sharpened by the monsters, couldn't help being surprised.
There is no thread in this nut.
The inside of some crystal nuts, under the light, shows a faint metal reflection.
If there is reflection, representative has metal mirror. However, the inner wall of a nut is as smooth as a mirror as a seamless precision tube.
Nuts without threads, can they be called nuts? Maybe metal washers are more suitable.
What is a nut?
Nuts are the most common metal parts in modern|Hyundai industry and life. Nuts are equipped with screws, and the two are tightly combined to fix the object. Even first-grade children know the principle.
The inside of the nut is called the internal thread, and the top of the screw or bolt is called the external thread. Only two nuts and screws of the same specification can be connected together.
The diameter is the same, and the pitch between threads is the same.
If there is no thread, how to tighten the connection with the screw?
Ye Qing believes that this kind of error that violates common sense of physics is impossible for Nikkei. Since they proudly gave this nut as a gift, there must be something in this nut.
"Is there a magnifying glass?"
Professor Cai Chenning nodded solemnly, and handed over a Kaland 300x portable microscope.
The portable microscope with its own light source is usually used to observe the surface of jewelry and the surface roughness of metal material. It is only cell phone size, very suitable for carrying.
After adjusting the resolution and light source, Ye Qing aligned the lens of the portable microscope at the inner hole of the nut.
Ye Qing's face also became serious. Under 300x magnification, the inner hole of the nut that was originally as smooth as a mirror. There are even a series of internal test threads appearing, these threads are circled around, and the distance between the pattern teeth and the pattern teeth is incredibly small.
Under the observation of a three-hundred portable microscope, one can barely see a trace of depression between the teeth.
How thin are these teeth?
The thickness of a strand of hair is 0.06 mm on average, but a strand of hair can be easily seen with the naked eye. If the hair strands are arranged neatly, leaving a gap of the same thickness in the middle, can the human eye see it?
If you look closely, you can see the clues. Ye Qing pulled a piece of his own hair down and observed it under a portable microscope, and noted the focal length and approximate width in his mind, and then aligned it to the inner wall of the alloy nut.
Compared with hair strands, the thread pitch is so small that it is impossible to judge. This shows that the gap between the teeth is much smaller than one tenth of the hair. As for how small it is, it has exceeded the visual analysis ability of the human eye.
"We measured it with a laser interferometer. The thread pitch is 0.2 wire and the thread depth is 3 wires." Professor Cai Chenning gave the answer.
"No wonder."
Ye Qing understood that the human eye can distinguish things that are much thinner than hair, and even silk can be seen under sufficient light source and contrast of different colors. But such a small thing has reached the limit of visual recognition.
Single silk is fine. If two silks are close together with a gap of the same thickness between them, the human eye will default to one.
These threads in front of us are based on the same principle. It is too thin, only one-th of the 30 thickness of the hair.
A circle of ultra-fine threads surrounds, of course, it has exceeded the visual recognition limit of the human eye, giving the illusion that there is no thread on the surface of this nut.
1 Hm is often referred to as 1 wire in industry processing, and 1 wire is equal to 0.01 mm.
Now the precision of the international Five-axis Processing Center, precision is usually 0.2 silk. The domestic precision is 0.8 silk.
This merely theoretical data, in actual operation, thinking of reaching 0.2 wire precision, you must adjust machine tools to the best level, use laser to set the tool from time to time, and automatically compensate for tool wear.
The nut in Ye Qing's hand has reached the limit of processing of represented ordinary Five-axis Processing Center.
"an eye opener, who can imagine that Nikkei University can make a nut like this?" Professor Cai Chenning said sadly: "When we got this nut, we still had students who didn’t know how to do it. They laughed at Nikkei University. The nut and the washer are not clear, so send a washer without thread, which is a nut."
"Someone asked me that the commercial five-axis center can control the precision at 0.2 wire. In theory, the precision can be controlled higher in the laboratory. Why can't it make a screw?"
Because this screw must be completed in one go, hundreds of threads that are invisible to the naked eye come out on processing.
The key point is that you have to have a tool that can be tapped. Not to mention that it is not available in the market. I made my own stupid words. It is far more difficult to make a tool that can tap a screw than to make a screw like this.
The thread of the ~ screw or nut is too thin. If Factory machine tools is lightly cut from the alloy steel, cut it to the thickness of a wire.
The cut off will never be a vertical metal piece, but a rolled skin like a lollipop.
This is metal stress, thermal deformation, cutting angle of the tool, metal toughness, děng děng|etc|wait factors are at work.
Professor Cai Chenning wondered, how did Nikko University of Science and Technology achieve that, in a nut with a height of 5 mm, processing produced hundreds of ultra-precision threads with only 0.2 wire pitch?
The most important thing is that the threads of processing are not deformed.
"The answer is on the metal material used in this nut." Ye Qing stared at the represented's most sophisticated processing technology nut, and whispered softly: "Japan(ese) has made great achievements in special alloys. ordinary metal is not resistant to high temperatures. The alloy material should be able to avoid metal stress and thermal deformation."
"I guess that's the case." Professor Cai Chenning asked cautiously: "But no matter what kind of alloy is as thin as 0.2 wire, it will deform with a single touch."
"The disciple I brought, used hand-made to grind out a very thin probe to test the thread hardness. I thought it would deform with a light touch, but the thread of this nut is not."
"It may be that the nano-level coating has increased the hardness. Using plasma vapor deposition, it can be coated with a Diamond grinding layer of one layer with a thickness of only a few nanometers." Ye Qing, who was brought out by a group of top monsters, was a little uncertain Said.
The Professor Cai Chenning, who knows a little about this process, fell into a long wry smile.
Because they couldn't do any of the techniques Ye Qing said.
Not only their Zhongyun University can't do it, but none of the Seiko companies Professor Cai Chenning knows can do it.
So, he brazenly called Ye Qing to invite Ye Qing to dinner.
Even the principal, who has almost never participated in the dinner, ran over and looked at Ye Qing eagerly.
"Ye Ye...General~IndoMTL.com~ Then you...can make this kind of screw?" The elegant principal Wang Hongnian blushed a little at this time. He is a typical old-school educator, and when he sees students, he keeps his stereotyped and serious image with a sullen face.
Ye Qing is also his student. At this moment, Principal Wang Hongnian asks Ye Qing for help with a cheeky face. There is always a feeling that his image is completely destroyed.
Especially when there are more than ten students sitting on the table.
But at this moment, no one cares about the image of the principal.
Immediately the face of Zhongyun University will be gone. Now in the campus forum, Mechanical Engineering Department have become national sinners. This screw can't be done. They can't even find the target. Are there any time to care about the principal?
Everyone was looking at Ye Qing eagerly, and Ye Qing held his chin: "It's easy to make screws. The key is that I have graduated now. This academic exchange meeting is for students at school, right."
It's easy to make screws!
It's easy to make screws...
The President Wang Hongnian, who had summoned the wolf of Japanese University of Science and Technology, did not hear the next sentence at all. He got up from the chair with a hot brain, his expression was even more excited than when he became Bureau of Education Chief: "Ye Always make a screw and teach those arrogant guys hard."
"When Mr. Ye ~ graduated, didn't the school ever send a postgraduate application form?" Professor Cai Chenning's eyebrows almost flew, and they kept rubbing their hands in excitement.
"It seems that there is..." Ye Qing certainly remembered the form. merely Ye Qing knew that he was not that piece of material, and would not pass it after filling it in, so he rubbed it after changing hands.
Professor Cai Chenning snapped a blank form on the revolving dinner table.
"Welcome Mr. Ye to come to our school to study as a graduate student. You don't use it to attend classes. If it weren't for the **** programming to leave, you can use your professional knowledge to get a doctorate directly." (To be continued.)