Chapter 842: Industrial gateway

The maid in the imperial study room shook the fan, blowing a bit of cool breeze on Xiao Ming and Lin Wentao.
Under Xiao Ming's explanation, the structure and images of lathes appeared in Lin Wentao's mind.
"The length measuring machine Qingzhou College mentioned by the emperor is already in the test, using the measuring unit established by the emperor. However, the most accurate length measuring machine that can be achieved at present can only be one-thousandth, and before the manufacturing of the length measuring machine, we still The millimeter level must be divided into equal parts so that the one-thousandth scale of the length measuring machine can be set."
Lin Wentao's words made Xiao Ming nod his head, which is exactly what he wanted to say.
At present, the measurement accuracy of Da Yu country basically stays at one percent, that is, millimeter level.
But in order to manufacture 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 this division of millimeters can only be done manually. I will provide you with a microscope and try to divide the millimeters at equal distances." Xiao Ming said.
Lin Wentao nodded. The problem of accuracy has always been a headache for him.
In fact, in his opinion, whoever masters industrial precision will master mechanical manufacturing. After all, machine tools are also called industrial master machines in Qingzhou University's books. As the name suggests, these machine tools are the mother of machinery.
"It's just that, 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 the rulers produced in the same batch of contemporary times will have errors.
Therefore, whether it is the accuracy of the parts of the lathe itself or the accuracy of the manufactured parts, there are errors, and the industry only needs to control the errors within a range.
Because of this understanding, Xiao Ming was not as confused as Lin Wentao.
This confusion is how the initial scale came from, such as meters, centimeters, millimeters, etc. In modern times, people may not think about the issue of ruler scales because everything is readily available.
But when he got here, he had to explain that, in fact, the most primitive scale was drawn by hand, just like he drew the weights and measures of the Great Yu Kingdom by himself, and extended it as a standard.
Then craftsmen use this scale to make measurement units, and then let the lathe produce parts with a certain accuracy.
Because of this, in fact, the accuracy of parts manufactured in Da Yu country can only be relied on by hand polishing. There is no other way. After all, in theory, only human hands can achieve infinite accuracy. This is how the evolution of lathe accuracy has come about in history.
In the contemporary West, the standards of weights and measures have been formulated, and other countries can only imitate each other’s units of measurement.
Now that Xiao Ming and Lin Wentao are doing this, in fact, they are also establishing the industrial precision of the country and forging the manufacturing tradition of the country, and the foundation of the manufacturing tradition lies in the rigor of the craftsmen.
"Errors are inevitable. It is impossible to have absolute equidistance. We can only reduce the error to a minimum. Once the accuracy standard of one thousandth is established, we can manufacture a vernier caliper of one thousandth, and then we can manufacture One part of the length measuring machine." Xiao Ming said loudly.
Mass production of breech gun parts is a node of Da Yu Guo's industrial breakthrough. Once this node is broken, Da Yu will embark on the road of precision manufacturing.
In this process, he also has to manufacture precision levels, dial indicators, right angle gauges, flat feet, high-precision spindle core rods and dial indicator rods, but before that, he must have a one-thousandth accuracy Original scale.
This is also one of his purposes 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, the emperor." Lin Wentao nodded heavily, he was under a lot of pressure.
After returning, he decided to mobilize all the craftsmen to seal this one-thousandth-precision vernier caliper, and pick out a caliper whose error cannot be distinguished by the naked eye as the original caliper.
After that, the machines for manufacturing vernier calipers were mass-produced, and then they were used to manually manufacture other precision-guaranteed tools.
The teaching between the two continued until about 3 in the afternoon, and Lin Wentao basically understood the problem of accuracy through the explanation.
Lin Wentao, who left the palace, went directly to Qingzhou University. Next, he will lead the students to establish the industrial accuracy standards of the country and formulate a set of part size specifications, but first he needs to manufacture an original vernier caliper with a thousandth accuracy.
When Lin Wentao was busy, Xiao Ming was not idle either, he summoned Li Chuyuan, the eldest son of the king of Chu.
It was more than two years after this tragic Chu Wang Shizi was thrown to Qingzhou because of Chu Wang's ambition, and the way back is still far away.
"Li Chuyuan, the eldest son of Chu, see the emperor."
In the imperial study room, Li Chuyuan bowed ninety degrees and bowed his head deeply.
He has been living in Qingzhou for the past two years, feeling the growing wealth and power of Qingzhou and becoming more and more disturbed, especially after the defeat of the Golden Horde, he never slept all night, and when he dreamed back at midnight, he was thinking about a problem, confronting Xiao Ming and Chu State What will end?
At this time, Xiao Ming sat down on the chair of the Imperial Study Room and was drinking tea. He said to Qian Dafu, "Give you a seat."
Qian Dafu responded and asked the to bring a chair to Li Chuyuan. Li Chuyuan hesitated and sat down.
The two sat facing each other, Xiao Ming did not rush to speak, but handed over the interrogation of Cao Zhengyang to Li Chuyuan so that he could read it first.
Li Chuyuan was a little inexplicable at first, but his face became more and more ugly after seeing it.
"Wishful thinking, wishful thinking!" Li Chuyuan's angry hands trembled slightly, "Where did the Cao family put his father and king? Where did he put me? The emperor~EbookFREE.me~Chu is my state, it can’t Fall into the hands of a gang of thieves in the Cao family."
Xiao Ming was very satisfied with Li Chuyuan's reaction. According to his understanding, he was a little dissatisfied when Chu Wang sent Li Chuyuan to Qingzhou. Now that his country is about to change, he is not worried.
"I'm afraid that you and King Chu were both kept in the dark by the Cao family. Since the Cao family wants to be in power, how can there be any affairs with your father and son in the future?" Xiao Ming said.
Li Chuyuan nodded. He knew what was going on in Chu State, but he didn't expect that the Cao family would contain such evil intentions. They waited for all rights to kick them away.
"The emperor, my father was blinded by lard, please allow me to write a letter to advise my father." Li Chuyuan said eagerly.
Xiao Ming squinted his eyes. He believed that King Chu would not pay attention to Li Chuyuan's letter. After all, the current King Chu was a bit crazy to lose his mind, and he was unwilling to rein in the cliff.
So he said: "Your father won't listen to you now, I just ask you, do you want to be a bereaved dog, or do you want the glory and wealth of the second half of the life!"