After hearing Ou Tiexin's invitation, Yan Liqiang laughed and agreed quickly, "Haha, I have the intention, even if the master Ou does not say, I want to go and see, is this water fire machine workshop in front?"

Ou Tiexin pointed to the front, "The workshop that makes this water machine is in front, just a few steps away!"

"Hahaha, Li Qiang, when I heard that you and Master Zhang had come up with a water lighter, the iron core made people travel thousands of miles to buy three water lighter darts from Pingxi County and bring them back with them. The craftsman dismantled the water lighter and researched it, and began to imitate it, but Tiexin praised the water lighter! "Luo Yutian also said with a smile, and then looked at Ou Tiexin," Is there anything about Tiexin this time? Question, this time you can ask Li Qiang for advice. This is a rare opportunity. Even if other artisan camps want to ask Li Qiang for guidance, they may not be moved! "

"Ha ha ha, Brother Luo is polite. I came here today to learn from my experience!"

Luo Yutian pointed to Yan Liqiang, "Humility, Li Qiang, you are humble again!"

Yan Liqiang smiled ...

"I have a question to ask Master Yan. I heard that the water-fire machine was originally invented by the master and Zhang Yourong, the master of the world ’s first organ of the Lingshan School. I wonder how the master would have invented this thing?" Tie Xin asked, and when he asked, all the craftsmen who accompanied him showed a sense of listening. Because of this question, they were also very curious. Just now the Heavenly Craftsman came to the Craftsman City, so he wanted to listen.

"At that time, Brother Zhang made a few gadgets by myself and took them out to discuss with me. I wanted to make that thing work without manpower. We discussed it together. Once when we were making tea, we watched When the boiling teapot moved under the impact of water vapor, the lid of the teapot moved up and down, so I got inspired and found a way to push things to run endlessly with the force of water and fire! "

"Admire, admire, I did not expect this weapon such as water lighter, it was actually drinking tea!" Ou Tiexin and a dry tradesman listened, one by one looking at Yan Liqiang with astonished eyes, if Yan Liqiang did not say, they would not I would think that this water-fire machine is actually two powerful people drinking tea together and inventing it after seeing the teapot boiled, and the cattle are really cattle.

"For the craftsman to the end, you have followed the way of the grid, knowing the grid, and seeing all things together, benefiting the world, and being beautiful, you must not despise your ability!"

After hearing Yan Liqiang's words, Ou Tiexin and a dry tradesman were shocked in their hearts. They felt that the words were endless, enough to be used as a craftsman for life. Even Luo Yutian listened and couldn't help but praise it again, "Li Qiang said Good job! "

The group said, after a short walk, they went to a large workshop covering an area of ​​tens of acres to make a water-fire machine in this craftsman's city. There were two large chimneys in the workshop, and they were braving the billowing Yang Yang, the chimney. Underneath, is a furnace for melting iron, hot gas billows, and the molten iron flows ...

When the crowds came, a group of artisans in the water-fire machine's workshop were busy and alive. A man with a master-like appearance ran over with sweat and gave salute to Luo Yutian, Yan Liqiang, and Ou Tiexin. Everyone visited.

Under the leadership of that craftsman, everyone went to the workshop and just saw a bunch of craftsmen busy. The most important parts of the water-fire machine are cast, so the most important thing in this workshop is The process is casting.

"Master, I think this water-fire machine workshop should have just been expanded?" Yan Liqiang watched as he walked. There is a very basic production mode in the workshop, but Yan Liqiang can still see The iron melting furnace and the sandboxes are very new. As for the casting process, let's not talk about it. It seems that it is not much different from the manufacturing bureau under your control, but in fact, in this casting process In China, some small differences are enough to bring about a huge impact.

"Adults can also see that the things produced in the former artisan city did not require many casting tools, so this casting workshop is not large, but to make a water-fire machine, the former casting workshop is not enough. It must be expanded. This workshop is newly expanded! "Ou Tiexin said, looking at Yan Liqiang, and said straight away," Although water turrets are also produced here, we are built like the parallel water fighters of His Majesty's Manufacturing Bureau. The water lighter that comes out is not as good as the water lighter of the Adult Manufacturing Bureau, and often has problems ... "

"Doesn't there often be sand holes in the castings you cast?" Yan Liqiang said casually.

"Ah, lord, do you see that?" Ou Tiexin and a craftsman looked at Yan Liqiang in surprise. Everyone did not expect that Yan Liqiang just came here and glanced, and suddenly found the problem, "We are here because There are too many problems with the cast. Only one or two of the ten can be used, which is inefficient and costly. It is really nerve-racking. Lord Luo rewarded Qianliang gold for a solution, and no one has been able to solve it. ... "

"The sand mold is being cleaned over there, let's check it out ..." Yan Liqiang said, and came to the workshop where several craftsmen were dismantling the sand box, watching the craftsmen cleaning the sand mold outside the casting.

As the sand mold is cleaned up, the casting under the sand mold also reveals its original appearance. This casting is exactly the most critical cylinder part in a water fire machine. Such a part can only be formed by casting, and it can be beaten and beaten. Not at all.

Yan Liqiang squatted down and looked. On the surface of the cleaned cylinder body, a lot of sand holes can be seen with the naked eye, which greatly affects the quality of the cylinder body. He grabbed the cleaned The sand mold was rubbed on the hands and then stood up. Such a problem was also encountered by the Manufacturing Bureau at first, but was solved by Yan Liqiang relying on the strong knowledge reserve in memory.

Speaking of which is also the sad part of the Han empire, the casting process is actually not complicated. The process of sand casting has already existed. In addition to this process, more complicated cavity melting wax casting methods are also available, but these casting processes, The place that has been used for a long time is not used to improve production efficiency, but is used to cast those exquisite rituals and other things, such as various tripods, bells, and funeral objects. These things are used to Bronze or silver is used for casting. To put it plainly, it is used for the wealthy and magnificent clan to enjoy and show their identity.

And the iron and steel utensils used for casting that can improve the production efficiency of the entire society are very poor. Correspondingly, casting has become a build. In the end, you can only rely on the blacksmith to make a little thing. The whole The productivity of society has not been improved for a long time, and even with the casting process, it has been stagnant for a long time. People who really understand steel casting are like a rare existence.

Although there is only a word difference between casting and building, the direction of social development that has evolved since then has been far different. One is still a farming society, while the other is striding forward in the direction of initial industrialization.

It is estimated that this craftsman city rarely cast any steel utensils before, so now I began to imitate the water fire machine, only to find that although the process is that process, it seems uncomplicated and can be mastered, but because of some slight differences, they also make Not as finished as the manufacturing bureau.

"Sir, can this problem be solved?"

Yan Liqiang patted the dust on his hands and stood up, "This problem can be solved!"

"I don't know where the problem comes from. A group of our artisans thought for a year and didn't find out what the problem was?"

"Did you use straw ash and dry sand when you were gathering sand?"

"Is there any problem with this?" Ou Tiexin looked at Yan Liqiang doubtfully. "Some of the artifacts cast in the former artisan city were not the same when making sand molds, but there have been no problems before."

"Are you casting copper or iron?"

"It's copper!"

"The melting temperature of iron is almost half higher than the melting temperature of copper, and the weight is much larger under the same volume. Although it is the same foundry casting process, do you think the sandy materials used for both are the same? "

Ou Tiexin's spirit shook, and he quickly arched his hand at Yan Liqiang, "Please enlighten me!"

"The most important reason for the formation of trachoma in casting iron molds is that the surface strength drops sharply after the mold is solidified after dehydration and drying, and the sand on the surface is easily eroded by the heavier and hot iron to fall into the molten iron, which will cause trachoma. If you don't want to produce trachoma, you can't use straw ash and dry sand when you gather sand. You must add clay with higher humidity, or mix a little paste to stir. Then the sand mold must be pressed and molded in the sand box. Before half an hour, spray the sand mold with water mist, don't let it dry, remember ... "

Yan Liqiang said, but the secret method among craftsmen is worth a million dollars. If it is placed elsewhere, it is definitely a skill of those craftsmen who pass on males but not females. I heard Yan Liqiang talk about this solution to the trachoma of castings. Tie Xin and a nearby craftsman were very pleased. They looked at Yan Liqiang one by one with admiration. This craftsman is really not blown out. Just look at it and you know the problem ...

Luo Yutian also laughed, "Li Qiang, in this way, the water-fire machine built in this workshop will probably be the same as your Majesty's Manufacturing Bureau?"

"Brother Luo wants to hear the truth?"

"What's the truth?"

Yan Liqiang shook his head, "Even if this problem is solved, the water-fire machine made in this workshop is better than yours before, but there is still a gap compared with the manufacturing bureau, and this gap is very difficult to make up The gap may grow wider in the future! "

Ou Tiexin, who was somewhat happy just now, was not convinced. "Adults say this, I'm afraid it's an exaggeration. How can there be such a big gap between the same water and light machines?"

Luo Yutian also looked at Yan Liqiang with a doubt ...

Seeing a short hair sticking to the leather apron worn by Ou Tiexin, UU 看书 www. uukanshu.com Yan Liqiang stretched out his hand and pinched the hair, "In my Majesty's Manufacturing Bureau, this hair weighs geometry, thickness geometry, and volume geometry. I require all qualified craftsmen to fully measure and calculate it. If copper and iron are used To make a thing the same as this hair, everyone must draw the same drawing. People who have not seen this hair do it according to the drawing. They can make exactly the same thing. I do n’t know in this artisan city. Among them, who can tell me this hair weight geometry, thickness geometry, volume geometry, you draw drawings and let others do it, how many people can make exactly the same thing as this hair? "

A group of artisans, including Ou Tiexin, heard Yan Liqiang's question, and then looked at the hair on Yan Liqiang's hands, all of them were dumbfounded.

Or was Ou Tiexin the first to respond, "Is there a different measurement system in the manufacturing bureau of adults?"

Yan Liqiang nodded, "Yes, my Majesty's Manufacturing Bureau and Lingshan School Qianjitang have adopted a new set of weights and measures. If there is no more accurate standard of weights and measures, it will be difficult to achieve greater development. It must be measurable for a tradesman like me! "