Because when he was guarding Jinan, Shang Yi heard Sun Heding say that cannons were being cast at Muling Pass, so after taking care of other matters, he immediately asked Sun Heding to take him to take a look.
Sun Heding also wanted Shang Yi to see his results, so he immediately took Shang Yi to the blacksmith workshop.
As soon as he entered the workshop, Shang Yi immediately discovered that there were ten long clay tube-shaped things lined up on one side, two large and eight small. The big one was about three meters long, and the small one was about two meters long.
Sun Heding introduced: "Sir, this is the clay mold for casting the cannon. They are made according to the dimensions of the No. 1 and No. 2 Fran cannons. It has been more than twenty days since the clay mold was made, and it will take about ten more.
It will be completely dry by the end of the day, and then we can start melting iron and pouring it."
Shang Yi nodded. He knew that in this era, whether in China or Europe, the method of casting artillery at home and abroad was to use clay mold casting or wax mold casting, which was called the clay mold method or the lost wax method. But casting in this way
Cannons and clay molds must be dried thoroughly. Otherwise, although the outside is dry, the inside is moist. When it encounters molten metal, moisture will be generated by itself. The cast artillery will have honeycombs, and the barrel will easily explode when fired. However, drying the clay molds
It usually takes a month, and if it rains, snows, and is cold, it takes two or three months. Therefore, it takes at least two months to cast a cannon, and as many as four or five months, and the clay mold must be cast after it is cast.
The cannon barrel must be broken into pieces before the cannon barrel can be taken out, so the clay mold cannot be reused, which easily leads to the problem that the cast cannons are of different sizes and standards.
This method was continued to be used two hundred years later, in 1841, when Gong Zhenlin, a famous scientist in the late Qing Dynasty, invented the iron mold casting method, which not only made the cannon casting process simple and easy, saved mold raw materials, and was not affected by climate conditions.
Limit, shorten the manufacturing cycle, reduce production costs, especially solve the problem of not being able to get out of the honeycomb, improve the quality and uniformity of artillery casting standards. And people at the time praised: "The method is the simplest, the most convenient to use, and it can be done in one go.
The benefits of hundreds of labors can save dozens of times of capital with one shot. Moreover, the spin casting does not delay the time, is flawless, naturally smooth, gets twice the result with half the effort, can be used endlessly, leads to the guideline of public opinion, and opens up the eternal method.
How can it be said that it is of great benefit to the country's armed forces?"
The application of European iron mold cannon technology was invented in 1873 by three scientists including Lavrov of St. Petersburg, Uchatis of Vienna and Roside of Shilin. It is much better than the iron mold cannon created by Gong Zhenlin.
The law was thirty years late. At that time, it was a miracle for Europe to fully enter the industrial society. This also proves that the Chinese people have never lacked ingenuity. As long as the objective conditions are certain, the Chinese can immediately create
Let the world see the dawn of success.
The iron mold cannon casting method is described in detail in the book "Illustrated Description of Iron Mold Casting Cannon" written by Gong Zhenlin, and was later included in "Hai Guo Tu Zhi" compiled by Wei Yuan. It was included in Shang Yi's computer. Simple
To put it simply, the cannon body is divided into sections according to the length and the iron mold is used as the mold. Each section of the iron mold is divided into two parts. When the cannon is cast, the two parts of each section are closed and tightened with iron hoops, and then the sections are joined according to the bamboo shoots.
Make it into the shape of a cannon. Then paint the inner surface of the iron mold with a paint made of fine rice husk ash and fine sand mud mixed with water. After it dries, apply a second layer of paint made from very fine coal powder.
After heating, add molten iron to the cannon core, and start casting. After the iron fire solidifies, immediately peel off each piece of iron mold according to the sections to expose the cannon body. While the cannon body is still red, use iron
Brushes and hammers are used to remove burrs and mud cores, and the uneven parts of the cannon body are trimmed to become a cannon.
After Sun Heding listened to Shang Yi explain the entire process and technical measures of the iron mold casting method, he was stunned. He stared at Shang Yi and did not blink for more than a minute, which made Shang Yi also I was shocked and thought he was possessed by a demon.
Sun Heding suddenly slapped his head, shouted, took Shang Yi's hand and shook it, saying uncontrollably: "Sir, you are so smart, you have come up with such an ingenious method. I have been studying cannon casting for more than ten years in vain. I thought that apart from Westerners, in the entire Ming Dynasty, there was no one better than me. But I didn't expect that your knowledge is ten times better than mine."
Shang Yi couldn't help but laugh twice, and then said: "Mr. Sun, this is just a random thought. It's hard to say whether it can be realized. Don't be too happy. Let's give it a try first."
Sun Heding laughed loudly and said: "Please don't worry, sir, this method will definitely work." After saying that, he turned around and called a craftsman from outside the house and said: "Go and ask them to stop and stop making clay molds. It's a waste of time. Then we gathered several teachers and masters, and we will start making new molds immediately." Unlike Shang Yi, who was just talking on paper, Sun Heding had very rich theoretical and practical experience, so after listening to what Shang Yi said, I immediately understood the reasoning behind it, and I also had a rough idea of Ju Ti’s approach.
Shang Yi hurriedly said: "Mr. Sun, there is no need to rush. I have another idea. Do you think it can be realized?"
Sun Heding said hurriedly: "My lord, please elaborate."
Shang Yi said: "In this battle of Jinan, I used you to make a new flying gun. This weapon is indeed very useful. But I think there are only six sub-guns in one flying gun, which is still a little too little. Can you Make it into a big box and hold dozens of sub-guns at a time. You can put them in the car at ordinary times, light them up and fire them all together when in use."
Sun Heding thought for a while, nodded immediately, and said: "Sir, your idea is completely feasible. I will draw a drawing for you right away." After saying that, he took Shang Yi to his workshop and spread out the I got paper and pen and started drawing.
Shang Yi watched him draw, and immediately thought of another question. Before Shang Yi traveled through time, his father was a construction engineer. When Shang Yi was young, computer graphics had not yet become popular. Shang Yi remembered that his father was at home. There is a set of special drawing tools, mainly drawing boards, T-squares, triangles, compasses, etc. Because when he was a child, he often watched his father draw architectural drawings at home. After joining the army, reading drawings was also an essential skill for special forces, so Shang Yi became interested in industrial architectural drawings. Quite understandable.
But in this era, there are basically no industrial drawing standards in the strict sense. Most of the industrial architectural drawings in ancient China are randomly drawn three-dimensional drawings, not the most basic three-dimensional views of later generations, and there are few dimensions. Not to mention the structure. Detailed drawings such as sections and samples can only provide a general appearance of the product, and it is impossible to construct according to the drawings. In fact, to a large extent, it still relies on the experience of the workers or the guidance of the designer. This also causes Many technologies have been lost.
Right now, it's okay to just build relatively simple things like guns and cannons, but if it develops into building cars, ships, or even large structures like houses in the future, it will be convenient if we can have a more accurate drawing. More than that, ordinary craftsmen can complete the construction according to the drawings as long as they are skilled in technology.
So Shang Yi told Sun Heding his thoughts again. However, it was not easy for Sun Heding to understand the standards of modern cartography. Shang Yi pointed again, made gestures, and drew a few simple pictures.
The three views finally gave Sun and Ding some understanding.
Although Sun Heding still couldn't accept these modern drawing standards for a while, he still understood the functions of the two things Shang Yi mentioned, the T-square and the triangle plate, and they could indeed bring him a lot of convenience. As for what Shang Yi heard
Although Sun Heding could understand some of the floor plans, elevations, and side views, he didn't know what use these drawings would be. As for the structural drawings, cross-section drawings, and large-scale drawings, Sun Heding was even more confused.
Ren Shangyi's mouth was dry and he didn't understand.
In desperation, Shang Yi could only give up the explanation temporarily and asked Sun Heding to find a craftsman to make the T-square and triangle plate first, and then draw a few simple drawings for him to see.
Although he put aside this topic for the time being, Sun Heding still dared not underestimate Shang Yi's ideas. After all, in his opinion, Shang Yi not only attaches great importance to technology, but also obviously understands technology very well. Maybe the method he mentioned is really useful?
Therefore, I am looking forward to Shang Yi coming up with samples as soon as possible. At the same time, Sun Heding is also very surprised. Where do these fantastic ideas of Shang Yi come from? But how can he work with such a boss who values technology and understands technology?
Sun Heding was still in a very happy mood while his subordinates were working.
Later, Shang Yi, accompanied by Sun Heding, visited various craftsmen's workshops. Shang Yi paid special attention to the drilling machine workshop, because currently Mulingguan was able to make its own muskets, and Shang Yi also attached great importance to it.
Sun Heding is also like Shang Yi. At present, Mulingguan has manufactured a total of sixteen drilling machines. If the raw materials are sufficient, he can produce fifty to sixty muskets within a month. However, according to Shang Yi's instructions, the transformation is being stepped up.
and repair existing muskets, changing half of them to flintlock types, so the production of new muskets has also been temporarily stopped. It is expected that within a month, all existing muskets can be modified and repaired, and then the production of new muskets can continue.
Musket.
While listening to his introduction, Shang Yi watched the craftsmen at work, and at the same time asked them a few technical questions, and also praised the craftsmen a few words, saying that they had a share in defeating the Qin army.
Credit for their work, or as long as they work hard and produce high-quality things, they are making a contribution to the country. Of course, they also asked about whether their family life is good, whether their wives and children are healthy, etc.
Although in later generations, this was a behavior that every leading cadre must show when they went to inspect the grassroots workshops of the factory, Shang Yi just copied it completely. But in this era, it is an extremely rare thing.
There may be officials like Shang Yi who would personally inspect craftsmen's workshops and have a kind and approachable attitude. However, there are few officials like Shang Yi who elevate the work of craftsmen to the level of "contributing to the country".