476 War Preparation 2
Three days later, the river channel began to release water. Because the selected terrain is relatively low-lying, the flow rate of the water is still very fast. As long as the sluice is lowered and the water is stored, the water channel on the workshop side will generate great power. Currently, the sluice has not been released. The newly installed water impeller has already transmitted huge kinetic energy.
In the steelmaking workshop, the water-driven blower is heating the charcoal furnace. The two furnaces of molten steel have been burned into water. They are waiting for the salvage of the scum, and they can pour it after a while. What they have to do is a forging platform. And some processing boring machines and forging clamps and so on. ァ新ヤ~⑧~1~中文网ωωω.χ~⒏~1zщ.còм
After many experiments, Li You has used charcoal and pyrolusite to reduce the metal manganese and roughly knows that the content of these pyrolusites is 60%. Although it is not very accurate, it can also control the manganese content in steel to 100%. Within two. In the future, most of the steel components do not need to be made of high manganese steel. The general low manganese carbon steel can meet the needs. If everything is made into high manganese steel, the pyrolusites brought by Dong Kui and others are not enough, let alone high manganese steel. Manganese steel is difficult to cold work, and it is certain that this material cannot be used for gun barrels.
The next day, in another workshop, Qiu Chengfu and others were watching how Li You used hydraulic drive shafts to process steel parts. Now they are doing ball bearings. You need to make a few different specifications first, and replace this workshop. The strength and accuracy of the hydraulic drive shaft will increase only after the bushing shaft is replaced. They just watched it first, and later they will need to make it by hand. When they learn to return to Siam City, they will have to rely on themselves, and no one will teach it anymore.
The craftsmen already know how to heat-treat steel parts. Li You gave it to them. Today, Li You made more than ten ball bearings. After the heat treatment, they can be replaced tomorrow. After the installation is complete, he can start processing another set of ball bearings.
Although the first set of bearings is rubbish, it is a gradual process. When the next set is made, pliers and cutting other tools, including steel pipes, can be processed, and the accuracy will also be improved a lot. There is no way, he must improve the accuracy, otherwise the machining accuracy and the future sealing of the barrel will be very poor.
Today, what Li You has to do is to process two high-manganese steel cylinders that are more than two meters in length and two high-manganese steel cylinders that are less than forty centimeters in length. These are drill bits used to drill barrels and cartridges. It is also necessary to install a cemented carbide bit after cutting, so as to complete the cutting of the barrel bore, and the other set requires the drill bit to be cut out and heat treated and carburized. Four drills had to cut the entire body to the same specifications. Just doing this, Li You spent a whole day.
These steel cylinders need to be hot forged before they can be externally cut. Even if there are processing tables and large clamps and high-speed drives of bearings and gears, it is still a bit difficult to do. High manganese steel is very difficult to perform cold cutting. It's not easy to process, but fortunately, the cutter head is still competent.
Three days later, when a burnt orange steel column with a length of about one meter two was put into the transmission clamp and clamped, and when the thick sleeve on the processing table was in place, Li You put down the transmission The gear, the orange steel column quickly turned. On the other side, a huge high-manganese steel drill bit with a length of more than two meters and a diameter of about eight centimeters was rotated in the opposite direction at a high speed and drilled into the steel column in the sleeve. At this time, the steel column body is very soft, and the drill bit can easily handle it. Penetrated with the steel pillar.
The next step is hot forging, which is removed together with the drill bit and placed in the forging die. The hot forging die fits well, that is, it requires manual rotation during mechanical forging. There is really no way to do this. It is extremely difficult to achieve this. This is not like the steel workshop of later generations, which can perform fast and powerful forging. Here Although it uses a crankshaft to drive continuous forging, it can hit a lot in one second, but the strength is not enough. The quality of the steel pipe made in this way is definitely not as good as that of later generations, but it is definitely enough. New Bayi Chinese website first released https://https://
Half an hour later, the hot forging was completed. Now the steel pipe is more than 1.8 meters in length, and the rest is to take out the drill bit in the center, so that a complete seamless steel pipe can be obtained. The entire drill bit is evenly coated. Graphite powder can be pulled out with a pulley winch.
Li You took a caliper to check the thickness of the steel pipe in all directions. The thinnest part of the pipe wall is about one centimeter, and the thickest part is less than 1.5 centimeters. Although it is not uniform, it can definitely be used. It's cutting and bore cutting. Regardless of the thin wall, this is a real seamless steel pipe or low-manganese carbon steel. It is absolutely safe to use black powder and there is no risk of blasting the chamber. In addition, the rear barrel of the barrel has been specially thickened to facilitate cutting and installing a rear-mounted cartridge. Now the wall of the rear barrel is three centimeters thick. Of course, after cutting, it will not be so thick.
When Qiu Chengfu and others saw that Li You was cutting the wall of the inner tube like wood, they were really surprised. They all knew that this new steel was really hard and wear-resistant. It is hard to imagine how hard a tool that can cut it off a layer of skin.
Li You is still very dissatisfied with this. The cutting speed is indeed slower. Although it can be cut, it is not a real high-speed cutting after all. The inner bore is easy to handle, but the cutting of the end is a bit difficult. This requires another The tool cut out an inner barrel shape. He knew the distance the processing mold was advancing. It might not be completed in less than two hours.
Li You's idea is quite simple. It is to cut out the chamber at the rear tube according to the shape of the bullet, and cut out two card slots at the tail with a tool, and finally process the chamber of the rear-mounted projectile. This requires certain requirements. Accuracy, as long as the accuracy is satisfied, once the chamber of the projectile fits the barrel, the projectile can be fired perfectly.
After the gun barrel was cut, it was already night. Li You did not plan to rest. He still needed to make the post-loading projectile. Although the process is the same trouble, it is only 30 centimeters in length. It is naturally relatively easy to process. Some more. The after-loading monomer does not need to penetrate, just drill a small hole for the lead wire, and then finish cutting the outside of the projectile.
When the two rear-loading projectiles were finished, it was dawn. The next work was the engraving of the inner bore. Another hydraulic workshop was dedicated to this. This is a relatively complicated set of linkage machinery. The clamp is clamped in the central position. The clamp is movable. It is rotated by a six-position gear plate on the clamp. This is a set of linkage machinery, as long as the barrel is clamped, the rest is the machine's own business.
The hydraulic power drives a huge connecting rod runner with a diameter of nearly two meters to work. A section of the runner is connected to a steel cylinder with a diameter smaller than the inner diameter of the gun barrel. The chainring holding the barrel will rotate once, and it will repeat. There is also a wedge below the front section of the cutter head. Every time the scribe line stretches to the end, this wedge will hit the stopper and slowly lift the cutter up, so that the rifling of the entire barrel can be automatically completed.
There are good knives, and it won’t take long to carve the rifling. It was completed before noon. Although the people here did not rest, they all wanted to see how powerful this so-called cannon really is. Li Youke was talking about the destruction, but they really wanted to see it. (End of this chapter)