Iron Dynasty

The maid in the imperial study was shaking a fan, blowing the cool breeze on Xiao Ming and Lin Wentao.

Under Xiao Ming's explanation, the structures and images of one lathe appeared in Lin Wentao's mind.

The length measuring machine mentioned by the emperor, Qingzhou College, is already in the test, using the measurement unit established by the emperor, but the most accurate length measuring machine that can be realized at present is only one thousandth, and before the manufacture of the length measuring machine, we still The millimeter level must be divided into equal parts, so that the one-thousandth of the scale of the length measuring machine can be determined.”

Xiao Ming nodded at Lin Wentao's words, which was exactly what he wanted to say.

At present, the measurement accuracy of Da Yuguo basically stays at 1%, that is, the millimeter level.

But if he wants to make locking structures and other more sophisticated machinery, he must increase the measurement accuracy to one thousandth, and even one ten thousandth in the future.

You're right, but these millimeters can only be scaled by hand. I will provide you with a microscope, and you can try to divide the millimeters into equal distances. Xiao Ming said.

Lin Wentao nodded, the problem of precision has always been a headache for him.

In fact, in his opinion, whoever masters industrial precision masters machinery manufacturing. After all, machine tools are also called industrial mother machines in Qingzhou University's books. As the name suggests, these machine tools are the mother of machinery.

Just like this, our scale will inevitably have some errors. Lin Wentao felt a little regretful.

Xiao Ming frowned. In fact, accuracy is only a relative issue, not an absolute issue. Even the scales of rulers produced in the same batch of contemporary times will have errors.

Therefore, whether it is the accuracy of the lathe's own accessories or the accuracy of the manufactured parts, there is an error, and the industry only needs to control the error within a range.

Just because he understood this, Xiao Ming was not as confused as Lin Wentao.

The confusion is how the scales came from in the beginning, such as meters, centimeters, millimeters, etc. In contemporary times, people may not think about the issue of ruler scales, because everything is readily available.

But here, he had to explain that the most primitive scales were actually drawn by hand, just like he drew the weights and measures of the Great Yu Kingdom by hand, and used this as a standard to spread.

Craftsmen then use this scale to create units of measurement, which in turn allow lathes to produce parts with a certain degree of precision.

Because of this, in fact, the accuracy of the spare parts manufactured by Dayu Country can only rely on manual polishing, and there is no other way. After all, in theory, only human hands can achieve infinite accuracy. This is how the evolution of lathe accuracy in history has come.

In the contemporary West, the standards for weights and measures have been formulated, and other countries can only imitate each other's size units.

What Xiao Ming and Lin Wentao are doing now are actually establishing the industrial precision of the Great Yu Country and creating the manufacturing tradition of the Great Yu Country, and the essence of the manufacturing tradition is the rigor of the craftsmen.

Errors are unavoidable, there is no absolute equidistant, we can only reduce the error to the minimum, once the precision standard of one thousandth is established, we can make a vernier caliper of one thousandth, and then we can make 10,000 One-half of the length measuring machine. Xiao Ming said loudly.

The mass production of breech gun spare parts is a node of industrial breakthrough in Da Yuguo. Once this node is broken through, Da Yuguo will embark on the road of precision manufacturing.

In the process, he also has to manufacture precision spirit levels, dial indicators, square meters, square feet, high-precision spindle mandrels and dial indicator rods, but before that, he must have a one-thousandth precision original scale.

This is also one of his reasons for letting Lin Wentao come here this time. He wants Lin Wentao to hand-polish a vernier caliper with an accuracy of one-thousandth.

Yes, Your Majesty. Lin Wentao nodded heavily, he was under a lot of pressure.

After returning, he decided to start all the craftsmen to engrave this vernier caliper with one-thousandth precision, and select a caliper whose error could not be discerned by the naked eye as the original caliper.

After that, the machine for manufacturing vernier calipers will be mass-produced, and then the vernier calipers will be used to manufacture other tools that ensure accuracy.

The teaching between the two continued until about 3:00 in the afternoon. After explaining Lin Wentao, he basically understood the problem of precision.

After leaving the palace, Lin Wentao went directly to Qingzhou University. Next, he will lead the students to establish the industrial precision standard of the Great Yu Kingdom and formulate a set of size specifications for parts. But first, he needs to manufacture an original vernier caliper with a precision of one thousandth.

When Lin Wentao was busy, Xiao Ming was not idle either. He summoned Li Chuyuan, the heir of the King of Chu.

This tragic Prince of Chu was thrown into Qingzhou for more than two years because of the ambition of the King of Chu, and the way back is still a long way off.

Li Chuyuan, the prince of Chu, sees the emperor.

In the imperial study, Li Chuyuan bowed ninety degrees and lowered his head deeply.

He has been living in Qingzhou for the past two years, feeling the growing prosperity of Qingzhou and becoming more and more uneasy, especially after the fall of the Golden Horde, he has not slept all night, and at midnight, he was thinking about a problem, confronting Xiao Ming, the state of Chu What will happen?

At this time, Xiao Ming sat down on the chair in the imperial study and was drinking tea. He said to Qian Dafu, Give me a seat.

Qian Dafu responded and asked the eunuch to bring a chair to Li Chuyuan. Li Chuyuan hesitated, but sat on it anyway.

The two sat opposite each other, Xiao Ming was not in a hurry to speak, but handed over the news of the interrogation of Cao Zhengyang to Li Chuyuan and let him read it himself.

Li Chuyuan was a little inexplicable at first, but after seeing it, his face became more and more ugly.

Delusional, delusional! Li Chuyuan's hands trembled slightly in anger, Where did the Cao family put the father and the king? Where did they put me? Your Majesty, the state of Chu is my feudal state, and I cannot fall into the gang of the Cao family. in the hands of a thief.

Xiao Ming was very satisfied with Li Chuyuan's reaction. As far as he knew, he was a little dissatisfied when the King of Chu sent Li Chuyuan to Qingzhou. Now that he sees that his own country is about to change, how can he not worry about it.

I am afraid that you and the King of Chu have both been kept in the dark by the Cao family. Since the Cao family wants to take power, how can there be anything about your father and son in the future? Xiao Ming said.

Li Chuyuan nodded. He knew what was going on in Chu, but he did not expect that the Cao family would contain such misfortune. They were waiting for them to have all the rights to kick them away.

Your Majesty, my father is blinded by lard, please allow me to write a letter to persuade my father. Li Chuyuan said eagerly.

Xiao Ming narrowed his eyes. He believed that the King of Chu would not pay attention to Li Chuyuan's letter. After all, the King of Chu was already crazy enough to lose his mind, and he did not want the King of Chu to rein in his horse.

So he said, Your father, the king, won't listen to you now, I just ask you, do you want to be a bereaved dog, or do you want to be prosperous and rich in the rest of your life!