Liu Xing then asked, "Where does Childe plan to put the workshop?" There's no way to start construction in this icy and snowy place."

"I have thought about this question, and from now until the beginning of spring next year, you will stay with the craftsmen who make the bearings, but you will have to do your own work, and you are not allowed to inquire about each other. If there is any violation, it will be dealt with according to the military law of leaking military aircraft. He Zhiyuan replied.

Liu Xing was shocked when he heard this, and immediately said: "Don't worry, Gongzi He, all the people in the Academy of Sciences know this rule, and they should never inquire if they don't ask." ”

The current Academy of Sciences is semi-militarized, and there is a general flag soldier stationed here, and there are sentries standing guard at the gate, and there are soldiers patrolling day and night. Personnel must ask for leave to be recorded when they go out, and unrelated personnel are not allowed to enter, and it is basically impossible for all outsiders to steal the secrets here.

At the same time, all research institutes of the Academy of Sciences have established a strict confidentiality system, and those who violate it will be severely punished. Of course, the people who work in the Academy of Sciences are well paid, and even the men who cook here and the handymen who clean up are much higher than the wages of the same kind of work in ordinary workshops.

The implementation of these systems has well ensured the confidentiality of all work in the Academy of Sciences. He Zhiyuan no longer has to worry about secrecy.

He Zhiyuan then said to them: "You guys prepare for it in the next few days, and divide the personnel of the institute into two, one part will go to work in the workshop, and the other part will continue to stay in the research institute. No outside recruits are hired until the workshop is relocated. ”

After arranging this matter, He Zhiyuan came to the ten craftsmen who made the bearings.

These ten craftsmen were very well-behaved, staying in the courtyard of the Institute of Physics, Wang Zhixue and they made such a big movement, they turned a deaf ear, just buried themselves in making their own bearings, and never came to see. This made He Zhiyuan very satisfied.

The slightly older Ding Sihai obviously became the head of these ten craftsmen, and when he saw He Zhiyuan, he stopped what he was doing, stood up and bowed: "Please Gongzi He, please be safe!" ”

"Excuse me! How's your progress over the past few days? He Zhiyuan asked Ding Sihai, who was standing with his hands down.

Ding Sihai said with a guilty face: "It's a shame to say that we have done more than a dozen, and almost all of them have failed. The main problem is the size of the steel ball, which is either too big or too small. ”

He Zhiyuan comforted: "It doesn't matter, since it is a trial production, I am not afraid of failure." Practice makes perfect, and it will be good when you are all proficient. ”

Ding Sihai picked up a bearing from the workbench and said to He Zhiyuan: "Only this one is installed, but the rotation is not as brisk as you said." ”

He Zhiyuan took the bearing and saw that the bearing was polished and shiny, and the appearance was very smooth, which looked no different from modern bearings. He took it in his hand and spun it around, feeling a little resistance, and his voice was a little loud.

After that, Ding Sihai took a wooden stick, put the bearing on the wooden stick and rotated it hard, the bearing turned four or five times, then stopped, and when it turned, he heard an obvious friction sound. After applying the oil, I tried again, and it was slightly better than the last time, but it only turned seven or eight times, and the friction sound was still very loud.

Although this is much better than no bearing, it is obviously not the effect He Zhiyuan wants. Because he knows that the bearing of later generations rotates hard, and the bearing can at least rotate dozens of times by itself, which is a bit big.

After thinking about it, He Zhiyuan asked: "Have the steel balls been polished?" ”

"It's all very smooth and without a single blemish." fourth

Sihai replied confidently.

"Did any iron filings leak between the steel balls and the support frame during assembly?" He Zhiyuan then asked.

Ding Sihai called a craftsman and asked the craftsman the above question again, and the craftsman replied with great certainty: "Definitely not, I use a steel hammer, and there will be no iron filings." ”

He Zhiyuan carefully reviewed the entire design and felt that there was nothing missing. He asked Ding Sihai to take him to the assembly process, picked up each part and looked at it carefully, and finally found the problem. It turns out that the inner and outer rings of the bearing are not polished and polished, and these two parts are in contact with the steel ball, if they are not smooth enough, the friction coefficient is too large, and the rotational resistance is large, and they will definitely not be able to rotate a few times.

Since the problem was found, it would be easy to do, He Zhiyuan asked the two craftsmen responsible for manufacturing the inner and outer rings to rework and let them increase grinding and polishing.

After an hour, the inner and outer rings are polished and polished. In the reassembly process, two craftsmen looked for suitable steel balls for assembly, and after several assembly failures, they finally found a suitable steel ball and assembled it successfully.

Then oil the bearing, put it on the wooden stick and then turn it by hand, at this time the noise is obviously much smaller, the bearing has been rotating and turning, it is estimated that it has turned at least twenty or thirty times before slowly stopping. This is the bearing He Zhiyuan wants!

So far, the first qualified bearing of Daming was born here.

He Zhiyuan gathered all the craftsmen, and then held the bearing just now and said to them: "This is the first qualified bearing you have made, and it will be manufactured according to this standard in the future." It's still the old rule, and each of the ten of you will be rewarded with a hundred taels of silver. ”

When everyone heard this, although it was not a surprise, they were still pleasantly surprised.

Then He Zhiyuan said: "The rewards for you are rich, but your responsibilities are also heavy. Bearings are very important mechanical parts, and you should keep them a secret. Only by keeping this secret can you have something to eat. ”

Everyone understood the meaning of He Zhiyuan's words, if anyone leaked the secret, not only would they have no food, but they would also have no food to eat.

After giving them a warning, He Zhiyuan praised again: "You have performed well these days, there is such a big movement in the research institute, you have not gone to see the excitement, you have not been distracted, and you have been doing the work in your hands wholeheartedly." In the future, no matter what others do, you just have to do your own thing. In a few days, the people from the research institute will also come here to make steam engines, and you are still not allowed to go to their side to see them, let alone ask around! ”

When everyone heard this, they agreed: "Don't worry, Childe." We all know the rules here, and we will never break them. ”

Ding Sihai hesitated for a while, but finally didn't hold back the question in his heart, and asked tentatively: "He Gongzi, what do you want such a rotating bearing for?" ”

He Zhiyuan decided not to keep the role of the bearing secret, so he smiled and said: "Do you think that if you install it on the axle of the wheel, will it save a lot of effort for the car to rotate?" ”

Wake up the person in the dream with a word, Ding Sihai thought for a while, and exclaimed again and again: "This idea is so wonderful, why hasn't anyone thought of this method for thousands of years?" Childe is really a man of God! You can think of such a delicate thing! ”

He Zhiyuan smiled slightly and didn't speak again. I thought to myself that I am not a god-man, but I have at least 500 years of more knowledge than you, and I can predict the future direction of the world.

After lunch at the Academy of Sciences, he came to the firearms factory again in the afternoon. He came this time to investigate

Looking at the casting situation of artillery, if they have mastered the technology of iron mold casting cannons, this time they will come by the way to their new casting technology.

There are still more than ten days to go before the New Year, and this may be the last time to come to Hejia Town before the year. So I want to get the things done all at once.

When He Zhiyuan entered the workshop where the cannon was casting, five craftsmen were pouring copper water into the iron mold. Seeing that they were busy, He Zhiyuan stood aside and did not speak.

It wasn't until they were done that five craftsmen came over to greet them, and He Zhiyuan asked them, "How is the progress of casting the bronze cannon now?" ”

The older craftsman said, "After two days of groping, I finally found the doorway. This is the second cannon cast, so there should be no problem. ”

There is no honeycomb-shaped pores on the body of the copper cannon made by this method of iron mold casting cannon, and the quality is far better than that of the copper cannon cast by clay mold, which is inconvenient to improve the success rate of casting cannon, and reduces the probability of exploding the cannon.

Another advantage of using iron mold casting cannon is that the iron mold can be reused, saving the casting time, and the speed of casting the cannon is greatly accelerated. And with iron mold casting cannons, you can cast a cannon in three days at the slatest, and one cannon can be achieved in two days after proficiency.

He Zhiyuan checked the first bronze cannon they had cast and felt that there was nothing wrong with it.

Therefore, he decided to teach them to cast iron-core copper cannons. The so-called iron-core copper cannon is to cast the cannon core with pig iron first, and then wrap the cannon core with a casting mold after the cannon core cools, and cast a layer of bronze outside the cannon core in the casting mold.

This method of making cannons was an invention of Ming Wei China, but unfortunately it was not widely popularized in the original history. Mingwei China's casting technology does not lag behind the West. The long-term war between the Ming Dynasty and the Manchu Tatars created a demand for advanced weapons, and the iron-core copper cannon came into being. The new gun was able to withstand higher chamber pressures with less material, reducing the weight of the gun. At the same time, pig iron has a higher melting point and better wear resistance, so this technology improves the life of the gun. Not only that, because bronze is more expensive, the iron-core copper cannon saves copper and reduces the cost of casting guns.

He Zhiyuan asked the five gunsmiths to explore and manufacture artillery in this way.

The first type of field artillery that He Zhiyuan chose was the Minin light long gun of this era, which was an 84-millimeter caliber breech gun that used six-pounder shells and had a barrel about two meters long. The direct firing distance of this kind of artillery is 400 meters, the maximum projectile range is 3,200 meters, and the standard gun weighs 900 catties. However, now using the iron-core copper body technology to cast the cannon, the weight of the cannon may be reduced a lot.

This gun was chosen because of the fact that the weight and caliber of this gun are more suitable. In the future, the enemies that He Zhiyuan will face will mainly be the Japanese and the Tartars in the north. Most of these enemies were infantry or a mixture of infantry and cavalry, and of course the battles with these enemies were mainly field battles, and less offensive and defensive battles. Therefore, this kind of light artillery that can cooperate with riflemen in field combat is the most suitable.

Under such demand, the six-pounder gun is more suitable.

The 900-pound artillery can also be improved to be lighter with the technology of iron core and copper body, so that it can be towed by horse-drawn carts, and it is more convenient to transport.

After explaining it to the five of them, it is estimated that it will take more than ten days to actually build this kind of artillery. In this way, it is almost the New Year.

So after He Zhiyuan finished teaching them, he returned to Juzhou City and went to do other things.

(End of chapter)

The little people of the Ming Dynasty

The little people of the Ming Dynasty

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