The so-called three-stage joint type is to burn wrought iron until red hot and forge it into a one centimeter thick sheet.
It is then wrapped around a cold bone made of a steel core, rolled into a tube, and hammered together.
During this process, the steel core must be continuously taken out and cooled to prevent welding with the iron pipe.
If the barrel is long, two or three sections are needed. The specific method is to burn the interface red and hit it hard.
After doing all this, use a four-sided steel cone to rotate inside the gun tube to smooth the inner wall of the gun tube.
In this way, a gun tube is formed.
The double-layer composite type is similar to this, except that it does not require welding.
Instead, a layer of blunderbuss tube is made first, and when it is ready, another piece of iron is wrapped around the first layer of blunderbuss tube, and then forged into a blunderbuss tube.
Relatively speaking, the double-layer composite type is more scientific than the three-section joint type, and the gun body joint is stronger.
Although this method cannot make a longer blunderbuss tube, it can make a larger-diameter blunderbuss tube that is more powerful within a limited range.
Chongzhen held the blunderbuss made in two ways, which was still warm after cooling, and sighed in his heart.
It is strange that the quality of the firecrackers made in these two ways is good.
No matter which method is used, it is jointed after all, and it will definitely not be able to withstand the impact of dozens of high-temperature and high-pressure gunpowder, and it will be understandable that the chamber will explode.
But this is already the best technology currently available.
In the following time, Chongzhen took everyone to watch the workshops of other components. In the workshop that was finally being repaired, Chongzhen discovered a piece of equipment that made him very curious.
Seeing the emperor's suddenly excited expression, Xu Guangqi immediately said: "Your Majesty, this is a drilling machine, which is used to drill and scrape the barrel of the gun.
A stone mill is used as an inertial wheel, which is tied with a leather strip and pulled manually to drive the drill bit to rotate. "
Fuck...
After hearing this, Chongzhen complained in his heart. He didn't expect that there would be drilling machines in this era.
The gun barrels of later generations were punched out of iron rods, also called seamless steel pipes. Now that we have drilling machines, wouldn't it be possible to make seamless gun barrels?
Thinking of this, Chongzhen quickly asked: "If that's the case, wouldn't it be possible to drill out the blunderbuss tube directly? The blunderbuss tube directly drilled out must be much better than the forged one!"
"His Majesty……"
Xu Guangqi laughed bitterly, and Sun Yuanhua and others also sighed.
Looking at the expressions of several people, Chongzhen realized that he had taken it for granted. He could think of it. Couldn't Xu Guangqi and other firearms experts not think of it?
Since it didn't work, there must be something wrong. After thinking about it carefully, he knew what the problem was. He whispered: "Is the drill bit not hard enough, or is the drilling machine not powerful enough?"
"Your Majesty has a sharp eye!"
Xu Guangqi pointed to the drilling machine on the side: "Your Majesty, the problem that the drilling machine is not strong enough is easy to solve. It is nothing more than increasing the number of people.
If two people are not enough, then four or eight can always push forward.
The problem is that it cannot be achieved uniformly. As long as the force is uneven, the drilled blunderbuss tube will be unevenly round, and the result will be that the barrel will be exploded directly with one shot.
The problem of drill bit hardness is better, but it is still difficult. The drill bits and files used today are all made of drill steel, and the steel is not very strong.
Only about three centimeters can be drilled in a day, and a one-meter-long blunderbuss tube takes several months, which is extremely inefficient.
The cost of the firecracker and the time involved simply didn't match it, so this method was not used.
Moreover, this requires a large number of skilled craftsmen and a large number of gunsmiths, etc., which the Ministry of Industry could not afford or guarantee before! "
Having said this, Xu Guangqi pondered for a moment, and then continued: "Actually, there is an alternative solution to drill bits and files, and that is to use Su Gang.
However, the price of a pound of Suizi steel is one to eight taels, while the price of a pound of Su steel is six to ten taels, a difference of five or six times! "
hiss……
All the generals took a breath, and one person subconsciously said: "Why are there such big differences?"
"Iron ore, pig iron, wrought iron, five fires, ten fires, hundreds of fires, and finally Su Gang. Ten kilograms of pig iron only yields about two kilograms of ten fires. Think about how much Su Gang you can get?
Including labor, etc., the price is not outrageous! "
Sun Yuanhua explained, and then said: "The most important thing is that Su Gang has low output due to process problems. It is unrealistic to replace all drill bits and files with Su Gang.
Even Su Gang cannot withstand the large demand for fire guns, and they wear out quickly. They still have to be replaced in time, otherwise they will not achieve the desired effect.
Therefore, it is possible to make a small amount of high-quality products, but it is unlikely to produce large quantities unless the problem of steel is solved! "
Everyone fell silent after listening to Xu Guangqi and Sun Yuanhua's explanations.
These two problems are problems that cannot be solved temporarily even with money.
Chongzhen's eyes flashed, he was not afraid of spending money, but he was afraid of having no choice.
"The steam engine must be made. If Su Gang wants to mass-produce it, even steel that is better than Su Gang must be made.
Otherwise, the development of firearms will almost stagnate! Seamless steel pipes and rifling require these! "
After making the decision, Chongzhen looked at Xu Guangqi: "You can also study the technology of drilling pipes. I will let the Ministry of Industry resolve Su Gang's matter!"
"I obey the decree!"
After Xu Guangqi responded, Chongzhen asked: "How many fire guns can this assembly line make in a day?"
Mentioning this, Xu Guangqi became excited: "Back to Your Majesty, the speed of making fire guns depends on the number of gun tubes. There are two hundred people in this assembly line, and they can make thirty or forty guns a day. After they are fully proficient, it is expected to eventually reach seven or eight. Ten handles!”
Listening to this data, everyone was shocked again. This was five or six times more efficient than the previous method.
An idea of the emperor increased the efficiency by five or six times. What an exaggeration.
"Your Majesty, I am now experimenting with blunderbuss and summarizing technology and experience.
The second step is to start preparing the assembly lines for the Tiger Crouching Cannon, Folang Machine, and Hongyi Cannon. It is expected that the initial construction will be completed before the year! "
"Don't worry about artillery!"
Amid Xu Guangqi's doubts, Chongzhen said slowly: "To build the artillery assembly line, it is necessary to deploy artillery craftsmen. The task at this stage is to make every effort to manufacture the Folan cannon and the Tiger Crouching Cannon!"
After Chongzhen finished speaking, a fierce look flashed in his eyes.
Fo Lang's machine gun and tiger squat artillery played a major role in Zunhua's pursuit of Amin and Mang Gurtai's blocking of the enemy.
At that time, there were only a few hundred doors, but now he wants to make at least a thousand doors to match the chariots and chariots. He wants Chahar Lindan Khan to taste what it means to be rich in firepower coverage!
Chongzhen nodded: "You need to make the production line process, each process, precautions, etc. into a specification manual. The local firearms manufacturing factory can copy and produce it with this specification manual!"
"Chen Ming..."
"Dean, dean... something happened!"
Before Xu Guangqi could finish his answer, a guard from the Firearms Research Institute rushed over from a distance.
The faces of Cao Wenzhao and others suddenly condensed, and the long swords on their waists were instantly unsheathed, protecting Chongzhen behind them.
Sun Chuanting took a step forward, stared coldly at the visitor, and shouted angrily: "Stop, visitor!"
After being shouted at by Sun Chuanting, the visitor trembled and stood there with fear on his face. Xu Guangqi's face also became ugly, and he cursed the visitor's presumption in his heart!
But he still took a step forward and said in a deep voice: "What happened?"
"B-B..."
