Four days later, the North Slope Mine was burned in the backyard.
Two deep holes were dug on the ground in the yard, each of which was round, narrow at the top and wide at the bottom.
The inner diameter of the front section is about twenty centimeters, and the inner diameter of the rear end is expanded to twenty-six centimeters.
These holes are the molds Roland intended to cast the cannon embryo. The inner wall of the hole has been baked by Anna, and the surface soil is sintered into a whole, as if a layer of shell is attached.
The medicine chamber is facing down to obtain better quality of the tube wall when casting, and the more scum and bubbles it contains.
The size of all caves was calculated by shells. He roughly remembered that the so-called six-pound cannons and eight-pound cannons in history were named after the weight of shells, so he first poured out a few twelve-pound iron balls, and then calculated the inner diameter of the mold based on the diameter of the iron ball and the wall thickness of the gun barrel.
In the absence of measurement tools, Roland simply customized the standards. He cut off an iron bar about the width of his ring finger nail and set it as the basic unit, one centimeter, and then made iron bars of other sizes and engraved them with segmented lines.
The diameter of the twelve-pound iron ball was about twelve centimeters under the rough iron ruler. He set the thinnest part of the tube wall thickness to four centimeters. In order to prevent the blow-off of the back end medicine chamber, the wall thickness expanded to seven centimeters, thus obtaining the inner diameter of the mold.
As for the length, although he knew that the artillery had a diameter, the only ones who had the impression were the main guns of battleships and main station tanks. As for the antique front-loading guns, he really didn't know.
Considering that the shorter the tube, the lighter the weight and the more material it saves, Roland waved his hand and took the value of 1.5 meters.If the test shot is not satisfactory, you can adjust it later.
When the cannon was first invented, it was made by circling iron bars on the wooden core and adding iron powder to the mouth, then reinforced with an iron hoop, and finally burning the core material in the barrel, just like a storage wooden barrel.
Roland certainly knew that this kind of gun was prone to leaking and blowing the chamber, so he directly adopted the overall casting and boring machine drilling process.
For steam boring machines, whether it is a six-pound cannon or a twelve-pound cannon, there is no essential difference in difficulty.
Based on the concept that caliber is justice, he naturally chose a twelve-pound cannon with a larger muzzle and a thicker gun barrel.
Going further up, it is not easy to use as a field gun.
As for whether the weight of the shell is calculated by shot put or iron ball, it doesn't matter, as long as it can be played.
After all, he is borrowing from history, not playing with copying models.
Let's get started, Roland took a deep breath and said to Anna.
The latter nodded, grabbed a steel ingot and dangled above the hole.
The green flame ignited, and the steel ingots quickly turned red, then melted, forming a tiny waterfall of steel that flowed into the hole.
The surface of the steel is reddish-orange, and the inner core turns to incandescent, making its brightness difficult to see directly.
In order to protect the witch's eyesight, Roland also specially set up a support beside the entrance of the hole. She just needs to determine the position in advance and lean her arms against the support cushion, so she can avoid staring at the steel water to see if it flows into the hole.
These ingots are accumulated slowly in normal times. Anna alone cannot start the era of large-scale steelmaking. However, after small-scale production is no problem for her, she can get better-quality steel by using the steel frying method.
This is also why Roland dared to set the barrel size for himself.Compared with pig iron barrels and bronze barrels, steel cast gun barrels obviously have higher strength.Even if the size is wrong, the cannon will not explode easily.
The steel water gradually increased, and the remaining steel ingots were also decreasing rapidly, which made Roland feel a little heartbroken.
When will he wait until he can build a pile of chimneys and blast furnaces on his territory and make endless steel?
For a long time, steel output was one of the criteria for measuring the strength of the great powers, and he now feels it personally.
Filling the two molds, Anna's cheeks turned red.
Roland took out his handkerchief and gently wiped the sweat from the tip of her nose.
At first, Anna would show some resistance, but now she is motionless and closes her eyes and allows Roland to do it.
The drooping bangs dyed a red edge under the reflection of the steel water, and the soft neck makes people want to take a bite.
When you are condescending, the other party will enter his own vision through the half-slim collarbone exposed by the collar.
As they were close, they could still smell the faint fragrance coming from her body.
Cough, okay... Roland put away his handkerchief and took back his emotions at the same time. Let's stop here today.Good job, I will tell the kitchen to reward you with an extra black pepper steak for dinner.
It’s not now, he thought that doing so would inevitably lead to the suspicion of taking advantage of others’ danger.Wait until she truly gains freedom...
Anna opened her eyes, and although the sweat had been wiped away, her face seemed to be redder than before.She nodded to Roland and responded softly.
*******************
For the next few days, Roland traveled between the Castle and the North Slope Mine.
In addition to the barrel, he also needs to make a sufficient amount of boring tools.
This tool used for drilling is similar to the barrel, with a diameter of exactly the same as the shell. After being removed from the mold, Anna heats it again and processes it with a hammer.
It is very different from an ordinary spiral knife in appearance, and at first glance it looks like a blunt iron rod.
The only difference is that a gap is knocked out on the top of the head to drain the metal debris.
Finally, quenching is used to improve the hardness of the boring tool.
Unlike the high-precision drill bits of modern boring machines, Roland only needs a hole-punched iron rod. Considering the high wear rate, he and Anna made five simple boring tools in a week.
Before this, the steam boring machine has fully verified its ability. The output of pig iron barrels has increased rapidly from two per month to ten per day.
When everything was ready, the cannon embryo was dug out of the pit by the miner, cleaned up the surface scum, and then carried it on a carriage to the blacksmith shop.
These two cannon embryos almost consumed all the steel accumulated by Roland, and it is not an exaggeration to say that it is a priceless treasure.
During the delivery, the prince ordered Carter and the two knights to be in charge of the entire journey, which made the chief knight feel a little unnecessary.
Who would steal such a dead thing?
The blacksmiths leveled and polished the outer surface of the cannon embryo according to the prince's requirements, polished the grinding stone, and then sent it to the backyard of the castle without stopping.
At this time, the two round solid steel rods were dark gray on the outside, emitting a heavy metallic luster.
Roland couldn't wait to replace the boring tool and together with Carter, fixing the cannon embryo in place, so that the top of the knife head was exactly at the center of the steel bar.
Faced with this historic moment, Roland pulled off the valve of the steam engine.The boring tool began to operate slowly and soon rose to a stable speed.
Exercise the knife!the prince shouted.
The chief knight pushed the sliding base to control the contact depth between the boring tool and the boring tool. When the head of the tool touched the barrel, the harsh noise immediately overshadowed the roar of the steam engine.
The lard that acts as lubricant is squeezed into the drill hole, and black foam and curly wires emerge.
The witches watching left the wooden shed one after another, and only Lightning still insisted on staying there.
It seemed that for her, these dark machinery were more beautiful and charming than any view.
Two deep holes were dug on the ground in the yard, each of which was round, narrow at the top and wide at the bottom.
The inner diameter of the front section is about twenty centimeters, and the inner diameter of the rear end is expanded to twenty-six centimeters.
These holes are the molds Roland intended to cast the cannon embryo. The inner wall of the hole has been baked by Anna, and the surface soil is sintered into a whole, as if a layer of shell is attached.
The medicine chamber is facing down to obtain better quality of the tube wall when casting, and the more scum and bubbles it contains.
The size of all caves was calculated by shells. He roughly remembered that the so-called six-pound cannons and eight-pound cannons in history were named after the weight of shells, so he first poured out a few twelve-pound iron balls, and then calculated the inner diameter of the mold based on the diameter of the iron ball and the wall thickness of the gun barrel.
In the absence of measurement tools, Roland simply customized the standards. He cut off an iron bar about the width of his ring finger nail and set it as the basic unit, one centimeter, and then made iron bars of other sizes and engraved them with segmented lines.
The diameter of the twelve-pound iron ball was about twelve centimeters under the rough iron ruler. He set the thinnest part of the tube wall thickness to four centimeters. In order to prevent the blow-off of the back end medicine chamber, the wall thickness expanded to seven centimeters, thus obtaining the inner diameter of the mold.
As for the length, although he knew that the artillery had a diameter, the only ones who had the impression were the main guns of battleships and main station tanks. As for the antique front-loading guns, he really didn't know.
Considering that the shorter the tube, the lighter the weight and the more material it saves, Roland waved his hand and took the value of 1.5 meters.If the test shot is not satisfactory, you can adjust it later.
When the cannon was first invented, it was made by circling iron bars on the wooden core and adding iron powder to the mouth, then reinforced with an iron hoop, and finally burning the core material in the barrel, just like a storage wooden barrel.
Roland certainly knew that this kind of gun was prone to leaking and blowing the chamber, so he directly adopted the overall casting and boring machine drilling process.
For steam boring machines, whether it is a six-pound cannon or a twelve-pound cannon, there is no essential difference in difficulty.
Based on the concept that caliber is justice, he naturally chose a twelve-pound cannon with a larger muzzle and a thicker gun barrel.
Going further up, it is not easy to use as a field gun.
As for whether the weight of the shell is calculated by shot put or iron ball, it doesn't matter, as long as it can be played.
After all, he is borrowing from history, not playing with copying models.
Let's get started, Roland took a deep breath and said to Anna.
The latter nodded, grabbed a steel ingot and dangled above the hole.
The green flame ignited, and the steel ingots quickly turned red, then melted, forming a tiny waterfall of steel that flowed into the hole.
The surface of the steel is reddish-orange, and the inner core turns to incandescent, making its brightness difficult to see directly.
In order to protect the witch's eyesight, Roland also specially set up a support beside the entrance of the hole. She just needs to determine the position in advance and lean her arms against the support cushion, so she can avoid staring at the steel water to see if it flows into the hole.
These ingots are accumulated slowly in normal times. Anna alone cannot start the era of large-scale steelmaking. However, after small-scale production is no problem for her, she can get better-quality steel by using the steel frying method.
This is also why Roland dared to set the barrel size for himself.Compared with pig iron barrels and bronze barrels, steel cast gun barrels obviously have higher strength.Even if the size is wrong, the cannon will not explode easily.
The steel water gradually increased, and the remaining steel ingots were also decreasing rapidly, which made Roland feel a little heartbroken.
When will he wait until he can build a pile of chimneys and blast furnaces on his territory and make endless steel?
For a long time, steel output was one of the criteria for measuring the strength of the great powers, and he now feels it personally.
Filling the two molds, Anna's cheeks turned red.
Roland took out his handkerchief and gently wiped the sweat from the tip of her nose.
At first, Anna would show some resistance, but now she is motionless and closes her eyes and allows Roland to do it.
The drooping bangs dyed a red edge under the reflection of the steel water, and the soft neck makes people want to take a bite.
When you are condescending, the other party will enter his own vision through the half-slim collarbone exposed by the collar.
As they were close, they could still smell the faint fragrance coming from her body.
Cough, okay... Roland put away his handkerchief and took back his emotions at the same time. Let's stop here today.Good job, I will tell the kitchen to reward you with an extra black pepper steak for dinner.
It’s not now, he thought that doing so would inevitably lead to the suspicion of taking advantage of others’ danger.Wait until she truly gains freedom...
Anna opened her eyes, and although the sweat had been wiped away, her face seemed to be redder than before.She nodded to Roland and responded softly.
*******************
For the next few days, Roland traveled between the Castle and the North Slope Mine.
In addition to the barrel, he also needs to make a sufficient amount of boring tools.
This tool used for drilling is similar to the barrel, with a diameter of exactly the same as the shell. After being removed from the mold, Anna heats it again and processes it with a hammer.
It is very different from an ordinary spiral knife in appearance, and at first glance it looks like a blunt iron rod.
The only difference is that a gap is knocked out on the top of the head to drain the metal debris.
Finally, quenching is used to improve the hardness of the boring tool.
Unlike the high-precision drill bits of modern boring machines, Roland only needs a hole-punched iron rod. Considering the high wear rate, he and Anna made five simple boring tools in a week.
Before this, the steam boring machine has fully verified its ability. The output of pig iron barrels has increased rapidly from two per month to ten per day.
When everything was ready, the cannon embryo was dug out of the pit by the miner, cleaned up the surface scum, and then carried it on a carriage to the blacksmith shop.
These two cannon embryos almost consumed all the steel accumulated by Roland, and it is not an exaggeration to say that it is a priceless treasure.
During the delivery, the prince ordered Carter and the two knights to be in charge of the entire journey, which made the chief knight feel a little unnecessary.
Who would steal such a dead thing?
The blacksmiths leveled and polished the outer surface of the cannon embryo according to the prince's requirements, polished the grinding stone, and then sent it to the backyard of the castle without stopping.
At this time, the two round solid steel rods were dark gray on the outside, emitting a heavy metallic luster.
Roland couldn't wait to replace the boring tool and together with Carter, fixing the cannon embryo in place, so that the top of the knife head was exactly at the center of the steel bar.
Faced with this historic moment, Roland pulled off the valve of the steam engine.The boring tool began to operate slowly and soon rose to a stable speed.
Exercise the knife!the prince shouted.
The chief knight pushed the sliding base to control the contact depth between the boring tool and the boring tool. When the head of the tool touched the barrel, the harsh noise immediately overshadowed the roar of the steam engine.
The lard that acts as lubricant is squeezed into the drill hole, and black foam and curly wires emerge.
The witches watching left the wooden shed one after another, and only Lightning still insisted on staying there.
It seemed that for her, these dark machinery were more beautiful and charming than any view.
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