Li Xiang had a premonition that there would definitely be some problems in the trial production of artillery, after all, this is a cross-era weapon. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

On the way, he listened to Shen Rong's description, the bore of the gun was cracked, which showed that the bore of the gun could not withstand the high pressure of gas generated by gunpowder, so to ensure the range, the only way to improve the manufacturing process of the gun bore and barrel was to improve the gun.

Li Xiang is also thinking about whether he can come up with a process close to forging in this era, because the artillery of later generations is basically drilled with a whole steel column, and then made by forging process, using the casting process, plus the casting of artillery is iron, not steel, and the natural strength is not enough.

If you want to make a more powerful cannon, then the problem is even greater.

Quickly called up the artillery data in the super 3D printer, Li Xiang also looked for a way in these materials, the inside of the modern fire pipe body is composed of two parts: the rifling part and the medicine room. Artillery can be divided into two types according to whether the barrel is rifled or not, one is rifled inside, which can rotate the projectile to stabilize the projectile flight posture, that is, rifled guns; The other is not rifled, that is, a smoothbore gun. In addition, there are several main structures that can withstand the high pressure generated during firing: a simple single-layer body tube structure, a single-layer body tube structure that is self-tightening to increase the strength of the barrel, and a multi-layer body tube structure.

Indeed, the main production technology and production process of the modern artillery barrel are too complicated and too many, and the production of the body barrel alone, from the manufacture of materials, to the pre-tightening processing, inner and outer diameter processing, self-tightening treatment, inner bore grinding, chamber processing, rifling processing, outer wall finishing, screw and groove processing, internal surface treatment, inspection at the time of completion, shooting test, post-shooting inspection, need to go through dozens of processes. In addition, in order to ensure the quality of products, strict tests and inspections must be carried out in each process.

This is unimaginable in the Southern Song Dynasty, of course, Li Xiang can also use a super 3D printer to directly print out modern artillery, but Li Xiang is not sure how many things this super 3D printer can print, if the materials inside are printed early, then only the function of a supercomputer is left.

In the early days, artillery barrels were made by bunching thin iron rods into a cylindrical shape and putting iron hoops around the outer sheath. After the era of single-layer barrels made of bronze, cast iron, brass, etc., with the invention of the converter steelmaking method in the second half of the 19th century, artillery began to use large cast steel barrels. Soon after, a high-strength alloy steel cast tube was manufactured to replace the cast steel tube. In addition, a multi-layered body tube and self-tightening body tube are manufactured using high-strength body tube materials without adding weight. In the Ming and Qing dynasties, small artillery was mostly manufactured by the building method, which was also called the forging method.

Li Xiang looked at it and decided to use this method, of course, this technique must also be printed out and studied by the craftsmen of the Ordnance Prison. Li Xiang knows that don't underestimate the craftsmen of the Great Song Dynasty, or rather, don't underestimate the craftsmen of the Chinese dynasties, as long as they are given enough space and support, they can burst out with absolutely powerful power and influence the ancient inventions of the world, and more than eighty percent can be found in the Great Song Dynasty, which has already explained the problem.

When he arrived at the secret testing ground, Li Xiang met Lu Wenxin, the squire of the military department, again!

Lu Wenxin was also very patient and waited until Li Xiang came here.

As soon as the two met, they couldn't help but laugh.

Li Xiang arched his hand and said loudly: "Master Lu, we meet again!" ”

Lu Wenren nodded and said with a smile: "I'm looking forward to the stars and the moon, but I've finally looked forward to the little brother!" Whether this artillery can be successfully made depends on the little brother! ”

Li Xiang waved his way and said, "Lord Lu is polite!" Speaking of which, although I designed this cannon, it all depends on the skilled craftsmen of the Ordnance Superintendent. On the way, I had already heard Lord Shen say that the chamber of this cannon could not withstand the high pressure, and cracks were formed. This is also because I didn't think about it at the beginning, although this casting method is easy, but the iron at this time is not good enough, so I came up with a method, ordinary pig iron is refined and forged to make fine iron, so that it should be able to solve the problem. ”

Wang Daquan also understood a little when he heard it, and he also knew that the cannon body made by this casting method had many defects such as bubble trachoma in it, so it was no wonder that it cracked after a shot.

Wang Daquan, who was excited, grabbed Li Xiang's hand and said hurriedly: "Li Gongzi, then you hurry up and tell me about it, what is the specific method?" If I don't solve this problem, I won't be able to eat and sleep! ”

Li Xiang smiled bitterly and said, "Lord Wang, don't worry! Listen to me slowly. ”

As soon as Li Xiang was about to start talking about the forging method, everyone gathered around, including those craftsmen who also stood far away and listened, after all, they didn't dare to approach in front of several big officials.

Li Xiang summoned a super 3D printer again, and talked about it according to the above information: "This forging method can also be called the building method, and the first step of the building method is to refine the pig iron into mature iron. When refining pig iron, the first step is to choose high-quality raw materials and fuels. Then the selected pig iron raw materials are refined in the furnace, and the straw is finely chopped, mixed with loess, and continuously sprinkled into the fire to make the iron feces come out of itself. In this way, five or six fires are refined, and then loess and pulp are used, straw is added, soaked for one or two nights, and then iron is put into the pulp, and after half a day, it is taken out and then refined. Each furnace should be refined to more than ten fires, and 5-7 catties of pig iron should be smelted until only 1 catty is left, which can be regarded as refined. Do you understand? ”

Shen Rong nodded again and again: "This method is good!" I didn't expect to wait until tomorrow, but we'll give it a try tomorrow! ”

Li Xiang nodded and said, "Then there is the second step, and the second step is to make plates." The refined wrought iron is beaten into iron blocks, and then the iron plates are divided into 8 pieces, and then the small iron plates are beaten into tiles, each iron tile is 1 foot 4 inches long, 1 foot 1 inch wide, thick in the middle, and thin on the edges. The third step is the roll. 4 pieces of iron tiles are rolled into an iron cylinder with a tire rod, and 8 pieces of iron tiles are rolled into two iron cylinders. ”

When Wang Daquan heard this, it was like an empowerment, and he immediately understood the subtlety of this construction method, he was so excited that he patted his head and said excitedly: "Okay, this is really wonderful, how did you come up with it, Gongzi Li?" This method is simply ingenious, my Wang Daquan has been in the ordnance prison for many years, and he also claims to be proficient in the method of ordnance manufacturing, and now he understands that there are mountains outside the mountains, and there are people outside the people! ”

Li Xiang laughed and said, "Lord Wang, don't say that!" I just came up with this idea by chance, whether it can be done is another story! When it comes to weapons, especially these iron methods, I am far inferior to you! ”

Lu Wenxin stroked his beard and smiled: "Two, don't blow it anymore, little brother should tell the unfinished part!" This official is also very curious! ”

Li Xiang's face flushed, he looked at Lu Wenxin, and continued: "Now I will talk about the fourth step, this fourth step is to connect, cut the ends of the two iron cylinders neatly, and use a few iron nails to join the two iron cylinders into one. The fifth step is to thicken the belly, charge, and firing place of the gun body. Then he took some iron and divided it into two pieces, and made it into iron tiles, and surrounded it in the belly of the cannon and the place where the charge and fire were fired, and thickened these places to make them strong. The sixth step is to make the rough blank of the cannon and hoist it on the shelf. After being put on the shelf, it should be hung with an ink line, and there can be no deviation. Then use ideas to polish the inner chamber to a smooth and round one, and even the ash in the chamber must be cleaned up. The seventh step is to install the fire door, file the light door and guard door on the gun body. In this way, one artillery piece was successfully made. Perhaps, the artillery made by this method should not have the problem of casting the cannon body. ”