Chapter 139 Iron Model Cast Cannon

Then Xiao Tianjian asked Gao Su to test fire several times in a row. He not only fired solid bullets, but also tested the power of the shotguns. It was also a lead bomb the size of a finger belly, but the shotgun launched by this copper cannon can also cause effective damage to the enemy in 200 steps away, which is more than dozens of steps away. For the undead tiger squat gun and Fran machine gun, the range has been greatly improved, which is almost beyond the surprise of many people. They sighed one after another. Fortunately, this cannon is their Xing Tianjun's. If it is against the enemy, the other party is 200 steps away. With one shot, they don't know how many people will die.

"Haha... OK! Gao Su, you did a pretty good job! It's commendable! Come on, write down a contribution to Gao Su and reward 50 taels of silver! There are also the craftsmen in the cannon. Each of them is rewarded with five taels of silver, which will be distributed with this month's wages!" After seeing the shooting effect of the three-pound cannon, Xiao Tianjian was happy and immediately laughed and ordered Zhang Chao to give them a reward.

After hearing this, Gao Su and his craftsmen were immediately overjoyed and quickly thanked Xiao Tianjian one after another.

"You don't have to thank me. Compared with us soldiers, what you have done is no worse than ours. Only when you constantly provide us with good weapons can we keep winning the war and our life be better and better every day! Our soldiers can have less casualties, and more soldiers can survive!

So we generals want to thank you! I hope you can make more better cannons for us in the future. One day we will make a country. At that time, not only will you be full and warm every day, but also your children and children will be full every day!" After Xiao Tianjian waved them up, he said to them.

Everyone laughed again and couldn't help but look forward to the good days in the future.

When Xiao Tianjian took the people back to the cannon and inspected the situation of the cannon, he saw that not only had just made a cannon just been tested, but also two cannons had been cast, but they had not been ground and could not be used for the time being. There were also Gao Su's wax molds of two cannons, just waiting to be modeled. After that, it can be cast.

In this way, if Gao Su and these cannon craftsmen work hard, they may have three to five such copper cannons in a short time, and during this period, they have also accumulated thousands of kilograms of copper, and can completely cast a few more such cannons, then the next step will be equipped with firepower. Step by step.

But this is also the limit. Although the copper cannon is easy to use, there are many advantages of using copper casting cannons, but after all, copper is not easy to do. This alone can't solve the fundamental problem by grabbing everywhere. Therefore, sooner or later, they will still turn to iron cannons. This kind of thing must be put on the agenda.

Xiao Tianjian thought about it in his heart. He carefully observed the process of casting the cannon in the cannon, squatted on the casting table, looked at the edges of the two cannon molds made of wax and butter, and touched his chin for a while.

Although the bronze three-pound gun cast at present has met his requirements and looks exquisite, it is expensive to cast a cannon in this way. Each cannon needs to make a wax mold, and then turn the sand into a casting mold to make a mud model, which is just the shade of a sand turning mold. Cheng, it will take a month or two. With a little carelessness, the model may crack and deform so that it will be completely scrapped. Even if the mud model is carefully made according to the process, sometimes it will be disturbed by factors such as temperature. Therefore, finally after multiple processes, a cannon can be cast, and the cast cannon, each The door can be called a unique work in the world, but relatively speaking, this process is also labor-consuming and time-consuming.

Although the shape of the cast gun requires unity, after all, it is not a mold cast, and there are still some subtle differences, especially in the inner diameter of the gun, it is not easy to achieve complete unification, and if the sand turning mold is not completely dry, copper water Or as soon as molten iron is injected into the mold, the moisture in the mold will evaporate, causing a cavity or sandbox in the casting, which seriously affects the quality of the casting. It is also for this reason that Gao Su has only been cast into a qualified copper cannon until now.

And when copper water is poured into the mold, the existing sand mold dissipates heat dissipation. When the copper water is cooled in the mold, the lighter material will float on it because of the different components, and the heavier material will sink under it. As a result, the cast gun body may have uneven material. It can affect the quality of the gun.

These things are expected to be known to these craftsmen, but this is the process commonly used at present, so Xiao Tianjian thinks it is still necessary to improve and improve work efficiency.

So he reached out and attracted both Yang Changshou and Gao Su in front of them and said, "Can you see if this gun casting process can be changed now?"

Yang Changshou has been working with Xiao Tianjian for a long time. Now when he hears what Xiao Tianjian said, he will immediately understand what Xiao Tianjian wants to say, so he immediately nodded and asked, "Does the general think there are shortcomings in this method of casting cannons at present? Is there any other good way to make the cannon better? General, just say it!"

And Gao Su is a relatively conceited person. Although Xiao Tianjian can be called an extremely smart person, he immediately said, "General, this method of casting cannons is the method handed down by our family, and our craftsmen in Western countries use this method to cast cannons!" There is no need to change anything at all! Isn't there anything wrong with the general's dissatisfaction with the cannon cast under it?"

After hearing this, Yang Changshou stared at Gao Su fiercely and said angrily, "What do you red-haired ghost know? Our general is a fairy. What don't you understand? If you put this little trick in my eyes, it's nothing more than that! The general can't hesitate to tell you that this is to praise us!"

Gao Su doesn't like this Yang Changshou. Obviously, there has been a lot of trouble between the two during this period, so they immediately retorted and said, "Since Yang Jiang's head can also do it, why doesn't Yang Jiang's head make cannons?"

Xiao Tianjian saw that the two guys were about to break up, so he immediately shouted, "Wake up! Be quiet and listen to me! Gao Su, let me tell you, there is always a mountain higher than a mountain in the world. Any technology has room for development. Don't be too conceited!

I'm not dissatisfied with the cannon you cast. On the contrary, I'm very satisfied with the cannon you cast, but please remember that in this world, you Westerners are not necessarily smarter than us Orientals! Please remember what the word modesty means!

I can now tell you a way to greatly improve the efficiency of casting a cannon. It turns out that you can only cast a cannon a month, and you may be able to cast a cannon in ten days! And I can guarantee that the quality of casting a cannon by the method I said will never be worse than the one you are using now! There will definitely be improvements! Please be patient!"

When Yang Changshou saw Xiao Tianjian's anger, he quickly closed his mouth and didn't dare to say anything more, but Gao Su was still a little unconvinced and immediately asked, "General, just say it!" I don't believe what the general said, which will increase the speed of casting cannons so much! It doesn't affect the quality of the casting gun! If the general's method is feasible, then I am willing to work for the general for life!"

Gao Su is indeed a little proud, even if he praises Haikou.

Xiao Tianjian sneered and said to him, "In this case, let's make a deal!" Then I'll tell you my method! That's the iron cast cannon! ......”

The iron cast cannon is not something that Xiao Tianjian thought of. This process was actually created by a man named Gong Zhenlin at the end of the Qing Dynasty. At that time, it should have been during the first Opium War. In order to resist the invasion of Western powers, the Qing Dynasty needed to cast a lot of artillery to build forts along the coast, but ordinary clay casting The cannon seriously affects the speed of casting cannons, and because of the different craftsmanship of the craftsmen, the quality of the cannons cast is also very uneven, and there are often explosion accidents. Therefore, Gong Zhenlin came up with such an iron model casting method. At the same time, he also summarized some advantages of using iron models, such as multi-casting, low cost and high efficiency. Reduce the workload of surface cleaning, polishing and polishing the inner well. The casting does not contain moisture, no air holes, and is convenient to collect and maintain. If the war is urgent, it can be put into production quickly for emergency needs, etc., which is consistent with the understanding of metal type in modern foundry.

And for this era, such casting method can completely meet the requirements in technology and will not cause insurmountable technical bottlenecks. Therefore, Xiao Tianjian once again plagiarized the wisdom of later generations and told this iron casting method to Yang Changshou and Gao Su and others, and Xiao Tianjian also took advantage of this to say the ordinary clay method. And the problems existing in the wax casting method, as long as the iron model method is used to cast the gun, these existing problems can be solved.

After listening to Xiao Tianjian's words, Yang Changshou, as an insider, screamed on the spot. Why didn't he think of such a simple method before?

And the expression on Gao Su's face was also very strange. Although he didn't cheer on the spot, he still understood the key to Xiao Tianjian's iron model method. In fact, he had already been impressed. He just couldn't open his face for a while and didn't say it.

After Xiao Tianjian said, he patted Gao Su on the shoulder and smiled at him, "Gao Su, do it as I said in the future!" First cast the iron model, and then change to the iron model casting cannon, so that the speed of casting the cannon here will increase a lot, and the scrap rate will also be greatly reduced! Don't underestimate the wisdom of our Orientals in the future. Many of the technologies you use now have been used by us Orientals for a long time!"