In the past month or so, Huaxia has conquered a total of two achievements.

One is porcelain, and the other is a kerosene lamp, which can be regarded as a less difficult tackle.

After the Ming porcelain craftsmen, porcelain making was no longer a problem in the Eastern Qin Dynasty, and it was only on the basis of the pottery factory that a porcelain kiln was reopened.

In order to ensure the homogeneity of porcelain from the Ming Kingdom, Yan Zheng deliberately let the porcelain craftsmen experiment with bone china.

That is, in the process of mud, 50% of animal bone meal was added, so that the first batch of porcelain was milky white, and it was thinner than the porcelain of the Ming Dynasty.

It's just that because animal bone meal is more rare than kaolin, bone china is only produced as high-grade porcelain, and there are no conditions for large-scale production.

As for kerosene lamps, it is only a matter of grinding a few small parts and pressing a suitable glass cover with a pressing machine.

This brighter lamp soon replaced the traditional oil lamp in the factory, and the first textile factory was finally able to achieve non-stop production day and night.

In addition, the intern students of the machine shop also built a planetary gear to verify the method of moving forward and rotating at a constant speed.

From the point of view of speed, it is not slow, but Yan Zheng is very anxious, and three days is a letter asking about the progress.

Sometimes he also went to the machine shop himself to see if he could give a few words of guidance. It's just that for now, he has less and less guidance to give.

After Yan Zheng met with Xiao Hei, he rushed to the 100th Research Institute of Huaxia Machinery Science and Technology Research Institute, referred to as 100 Institute, which was composed of several factories.

The reason why this kind of organization is formed is to coordinate the talent and technology of each factory, so as to achieve a real concentration of efforts to do great things.

He inspected the first rifling machine and found that the basic frame had been built, but after using planetary gears, it still could not achieve the required synchronous and uniform motion.

Because rifling is a demanding process, it is necessary to ensure a uniform speed when traveling and rotating, and to ensure that no matter how hard the rifling is used, the same winding distance must be ensured.

Therefore, the key structure is the planetary gear, which has high requirements for the calculation of the gear involute.

"Still have a problem?" Yan Zheng asked.

Mo Qi, the team leader in charge of this research, said with a sad face: "It hasn't been calculated yet, and several sets of data have been proven to be wrong!" Every time you make a mistake, you have to get a new set of gears! ”

"I don't want to listen to whining, I just need a rifling machine!" Yan Zheng roared.

Everyone present cast their eyes and looked at Yan Zheng with a little surprise.

Mo Qi shrunk his neck, and looked at Yan Zheng firmly: "Don't worry, even if you are tired, we will also take down the rifling machine!"

Yan Zheng came back to his senses and sighed slowly, he understood that it was not good to be in a hurry, but he was very irritable now.

He is now unable to guide practice, but can only play some role in theory and design, and the next steps are completely up to these people to complete.

"Let the math group, as well as the senior students, as long as they know math, come and help!"

"This ...... Your Majesty, but they have other tasks as well! ”

"Put those first, the rifling machine is the most important!"

After finishing speaking, Yan Zheng turned around and left, looking at his back, everyone present felt guilty.

It used to take so long to conquer something?

From the establishment of the project to the present, they have sound drawings, but they can't restore the correct gear structure.

A day later, the math group and the senior students arrived, bringing a large number of abacus and soon began to accept work.

As long as someone from the institute gives a piece of data, they calculate a piece of data.

Qiu Ruicai, as an old abacus, made a thunderbolt from an abacus, and for the fragments of these numbers, he also sweated on his forehead.

And only when a set of final data comes out, there will be craftsmen who polish the gears and take the data to process the semi-finished gears.

They draw contours on the semi-finished products, compare the data, and then use a gear cutter to process the gears.

Five days later, when the waste paper was piled up into a small mountain, the Ji Qi in charge of the test finally screamed!

He shouted, "It's done! It's done! That's right, this data is right! ”

Everyone paused, and then a carnival erupted.

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"Your Excellency, according to your description, the rifling machine is actually similar to a boring machine, except that the boring machine is boring and polishing, so there is no need to control the boring bar and boring tool! And this rifling machine is to follow the same trajectory, with the cutter head to do work in the barrel, if you outline a straight line, it is simple, but this requires a curve around the barrel! ”

"After we have tested, the planetary gear can indeed ensure the uniform speed of travel and rotation, after calculating a large amount of data, it will also be able to pull out the rifling machine with a winding distance of 1:10, 1:11 and 1:12, but when we tested, we pulled the wooden pipe, but when we pulled the barrel again, we found that it could not be pulled, and the cutter head was easy to be damaged if it was deadlifted, and it was not possible to pull out the rifling of the same specification that was qualified!"

In the machinery factory, Mo Qi, Ji Qi, Tiemu Needle and others, facing Yan Zheng, all chose to bow their heads.

Yan Zheng looked at the real first-generation rifling machine they had built, and only felt that it looked quite decent, and when it was reciprocating, the speed of the barrel rotation was also constant.

Just when I watched them rifling, I felt constipated, and I got stuck when I pulled it.

In fact, he also knew another method of rough rifling, which was to use a diamond-shaped piece of high-carbon steel and hammer it directly into the barrel, which was used by the TG Arsenal.

The problem was that the barrel at that time, even the recovered barrel, was durable enough, so it was able to use this crude method.

As for the barrels used in Dongqin now, they are all made of medium carbon steel, which are directly processed under the action of straightening machine and hot drawing machine.

And the reason why there is a requirement for the entanglement is because he pursues perfection! Otherwise, 1:7 or 1:20 is not impossible.

Only then the barrel is easily damaged, and the rifling may lose accuracy when firing two to three hundred rounds.

"Can you try to adjust the height of the knife so that you only pull a small layer each time, and then slowly expand!" Just when everyone was watching in a muffled voice, Zhao Chenggong, who was watching from the sidelines, suddenly asked weakly.

Buzz - like a quick knife, cutting a mess from the middle, countless threads are popping up at the fracture.

Yan Zheng raised his eyebrows, and the ironwood needles and Ji Qi, as well as the rest of the so-called old workers, all looked at Zhao Chenggong.

That's right! That's the right idea! You can't pull so much at once, so take your time! Isn't this exactly what the king said, the spirit of ants gnawing bones?

Yan Zheng laughed, and after laughing for a while, he couldn't help but shake his head, looked at Zhao Chenggong and said, "Zhao Chenggong!" It seems that your book was not read in vain, the important thing is that you did not read a dead book! Such a simple question, a group of us would be at a loss! ”

Ji Qi also said happily: "Adjust the height of the knife, this is not any difficulty, only need to be slightly modified, if you only pull a small layer at a time, little by little grinding, just like the file is smooth, it will definitely work!"

Tiemu Needle also smiled, patted Zhao Chenggong's shoulder and said, "Young people still have a lot of ideas!" We are old stubborn, our thinking is solidified, and we only think about deadlifting if we can't pull it! ”

Zhao Chenggong scratched his head shyly: "Actually, I watched the head of the rifling machine being stuck, and I thought of sawing wood, sawing wood is easy to get stuck if it is sawed too hard at the beginning, but after slowly sawing in, there will be no such problem." It's the same with rifling machines! ”

"Well said!" Yan Zheng looked at him with a smile and said: "Scientific progress is innovation and attempt, we must dare to think and dare to do, we must not shrink our heads and tails, and set limits on our thinking!"

In the midst of all kinds of praise, Zhao Chenggong smiled, and his heart couldn't stop getting excited.

Yan Zheng walked in front of the rifling machine, patted it and said, "I'll just say, the rifling machine should be the easiest to overcome among several mechanical projects!" As long as you have a device that ensures synchronous and uniform movement, you can build it in no time! You should immediately step up the test and strive to build the first practical rifling machine as soon as possible! ”

The people in charge at the scene even claimed that it was, and they all understood that Fang Cai's idea was absolutely feasible, which meant that the rifling machine would become the first mechanical project to be overcome.

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