Chapter 37 Exam

Of course, the laboratory has high-precision analytical balances, as well as high-precision torque measuring instruments. After one day of calibration by Guo Tailai, he can easily and accurately measure the weight change of 1 mg with one hand, and also calibrate the accuracy of torque measurement to 0.001 Nm.

Next, Mr. Liu talked to Guo Tai about determining the center of gravity and dynamic balance of the workpiece. Whether it is assembling gyroscopes or high-precision machine tools, these two aspects are extremely important, and they are also the most difficult to master.

However, Mr. Liu still underestimated how evil Guo Tailai was. When this guy can distinguish the weight difference of 1 milligram with his hands, coupled with his incomparably powerful calculation ability, any regular workpiece can almost instantly determine the center of gravity in his hands.

The essence of dynamic balance is high machining accuracy and symmetry, and the other is weight balance in all directions. The center of gravity must fall perfectly on the center of gravity of the shaft so as not to cause vibration. In this regard, after Mr. Liu pointed out a few times, Guo Tailai took the practice work piece and easily solved the problem. While Mr. Liu was stunned, he was also extremely satisfied.

There are disciples like this, what can the husband ask for?

Although Mr. Liu never said that he wanted to accept Guo Tailai as his disciple, nor did Guo Tailai say that he wanted to worship Mr. Liu as his teacher, but the relationship between the two of them was completely confirmed in their hearts. Although Guo Tailai sometimes speaks the same thing, but to Mr. Liu, he really treats him as a master.

"Try to make a set of workpieces by yourself to achieve dynamic balance." Mr. Liu assigned Guo Tailai a homework, or an assessment: "When you can make me nod, you don't have to learn it."

This is Mr. Liu's graduation exam, and Guo Tailai attaches great importance to it. What kind of thing should I make to meet Mr. Liu's assessment requirements?

At the first moment, Guo Tailai thought of Zhao Yanyan's gyroscope. But obviously, the highly confidential design of the gyroscope cannot be given to Mr. Liu, nor can it be made in the fitter's workshop.

Immediately, Guo Tailai thought of a fun thing from the gyroscope, the fidget spinner.

In the dream of the future, Guo Tailai saw a scene, which was a fidget spinner made in Japan, spinning crazily for more than 24 minutes before stopping.

That fidget spinner set a Guinness World Record for a continuous spin time of 24 minutes and 46.34 seconds. Japanese firm MinebeaMitsumi supplied the gyro's bearings, rims and precision nuts, while Mitsubishi Seiki was responsible for the design, assembly and testing. Founded in 1951, MinebeaMitsumi is a manufacturer of miniature ball bearings and holds the world's highest share in the field of miniature ultra-precision ball bearings. This Guinness-certified precision "toy" is worth $450, and the value behind it lies in the accumulation of long-term precision manufacturing technology.

It has to be said that Japan in the future will have a strong technical advantage in high-precision bearings. But now, Guo Tailai also wants to challenge himself.

The design scheme Guo Tailai has in mind, and the only two obstacles to realize it are materials and processing. In terms of materials, Guo Tailai has no good solution for the time being, so he can only turn to Zhao Yanyan for help.

"Mr. Liu's apprenticeship test?" Zhao Yanyan was also aroused after hearing Guo Tailai's intentions: "You need homogeneous and wear-resistant high-hardness steel, and you need a clean room for finishing the finished product?"

Guo Tailai nodded.

"What are you going to do?" Zhao Yanyan asked with great interest, "Tell me?"

"Let's not talk about it, you will know when I make it." Guo Tailai said: "In short, it is related to your gyroscope production, and it will never let you down."

"Okay!" Zhao Yanyan nodded immediately when she heard that the latter sentence was related to her gyroscope, "I can handle the clean room, homogeneous and wear-resistant high-hardness steel, you'd better go to Professor Wang, he There is a processing center over there, and the material grade is very high, so I don’t need to go around looking for someone else.”

Guo Tailai was taken aback for a moment, then slapped himself on the forehead. I also have a mentor during the master's period, who else can I turn to if I don't ask him for this kind of thing? And making it is also good for Professor Wang, isn't it?

Professor Wang is better at speaking. Hearing Guo Tailai's request, he gave him two kilograms of special bearing steel without saying a word. This is for high-precision machining center bearings, which definitely meets Guo Tailai's needs.

Guo Tailai made the rough embryos of several parts at the school-run factory, then packed them together with the tools in Mr. Liu's studio, and brought them to a dust-free studio specially set up by Zhao Yanyan in the laboratory.

Everyone could see that Fatty was serious. In the past, whether the fat man made crankshafts or turbine blades, at most he made them with a pair of ordinary labor protection gloves, but this time, Guo Tailai was wearing rubber gloves and a specially-made dust-free work suit. Mask operation. Moreover, a clean and dust-free environment is required. Is it because you are afraid that dust will affect the accuracy?

Fatty stayed in the dust-free studio for three days. No one outside was allowed to go in, and they could only watch the fat man sweat profusely on the console through the window at the door. You know, even the complicated water turbine blades, Fatty can only finish it within 12 hours overnight, but what he processed this time, it took three consecutive days.

What's even more frightening is that the fat man has to rest for ten minutes every half hour, especially after each operation, he has to use a blower to blow away every bit of processing residue on it, which is extremely serious.

It was rare for Zhao Yanyan not to show embarrassment to the fat man. Instead, he took the initiative to undertake the logistics work for the fat man. Every day when it was time for meals, he would order carefully matched meals for the fat man from restaurants outside the school. There was also a supper at night. confidence.

Guo Tailai did not rush to work day and night, but fully guaranteed his rest time. When the time came at night, he would take the initiative to sleep in the lounge next to the clean room. With the help of nano-robots, the fat man can enter deep sleep and have a complete rest every day.

Fatty will carefully lock unfinished workpieces in a box with a velvet bottom, and even move them carefully. Although Zhao Yanyan and the others were curious, seeing that the fat man was so cautious, they patiently did not open it secretly.

The processing took a day and a half, but the subsequent assembly took the fat man another day and a half. Fat people use their own hands where they can be installed by hand, and silicone tweezers instead of metal tweezers for those who cannot, to ensure that there will be no slight imbalance due to friction.

"Senior sister, it would be great if you could call the notary of the Guinness World Records for the demonstration another day." Before going to bed the next night, Guo Tailai and Zhao Yanyan talked a lot, because this is what the Japanese will do in the future.

"I'll organize it." Guo Tailai didn't expect Zhao Yanyan to agree: "I want to see what kind of surprise you will bring me."