Zhao Ji nodded approvingly, admiring Chen Gui in front of him, who was hailed by later generations as the "Military Technologist of the Song Dynasty".

Sure enough, it’s easy!

Zhao Ji smiled and explained in detail:

"The fourth method of making musket rifling is called the 'rifling top cone squeeze method'."

"That is, when a hard top cone whose middle section has the same cross-sectional shape as the inner cross-section of the rifle is used to pass through the smooth bore of a barrel with an inner diameter slightly smaller than the top cone,

Under the strong pressure of the top cone, the barrel metal will slightly increase the inner diameter of the gun bore.

At the same time, the protruding part on the surface of the top cone squeezes through the inner wall of the gun chamber, causing it to deform and obtain the bore line.

At the same time, the recessed part of the top cone squeezes along the inner wall of the gun bore, causing deformation and forming a positive rifling.

When the smooth part of the hard top cone is forced through the inner wall of the gun bore, the gun bore will become smoother except for the smooth inner wall required at the yin and yang rifling areas.

In this way, the service life of the gun barrel will be doubled."

Firearms manufacturing envoy Chen Gui and deputy envoy Li Ji were so impressed that they fell to the ground after listening to Zhao Guanjia's explanation...

In fact, the cone extrusion method for making musket rifling given by traveler Zhao Ji was first invented by the Germans. After the 1970s, this method has been widely used by various countries in the production of gun barrels.

Zhao Ji knew that the replacement of the 'rifling top cone extrusion method' was the 'cold precision forging method'. This method of manufacturing firearm rifling is the most advanced.

Since the precision forging process can improve the strength and shooting accuracy of the barrel, thereby extending the life of the barrel and reducing the drop in muzzle velocity, it plays a key role in improving the performance of the firearm.

However, the modern technology content required is also higher.

In modern society before Zhao Ji traveled through time, both many developed countries in the West and our own country were using the 'cold precision forging method' to make the rifling of firearms...

He knew that with the current industrial and technical capabilities of the Song Dynasty, it would be difficult to implement the 'cold precision forging method'.

However, he still briefly introduced Chen Gui and Li Ji.

Zhao Jidao: "The fifth method of making musket rifling is called 'cold precision forging method'."

"Using this method to make musket rifling requires a professional precision forging machine.

To forge the rifled barrel and the bullet chamber from the blank of the gun barrel at one time, it is a chip-free precision forming technology, and the accuracy of the inner bore must be guaranteed by the mandrel.

In the Song Dynasty, it is difficult to use the "cold precision forging method" to produce musket rifling.

Therefore, firearms manufacturers do not need to consider using this method to make musket rifling in the past three years.

You can just focus on the first four production methods I gave you."

"I obey the decree." After hearing this, Chen Gui was so excited that he knelt on the ground and thanked the Holy Father repeatedly for his grace.

When he first heard every method of making rifling described by Zhao Guanjia, he felt like he was listening to a book from heaven;

However, after Zhao Guanjia explained it to him in detail, he would suddenly realize that he was suddenly enlightened, just like parting the clouds and mist to see the sun, holding on to the clouds to see the moon...

Chen Gui looked at the five pieces of rice paper he had recorded. He silently wrote down the five methods of making musket rifling given by Zhao Guanjia:

One is the ‘scraper method’…

The second is the ‘hook knife broaching method’…

The third is ‘combined ring tool broaching method’…

The fourth is the ‘Rifling Cone Squeezing Method’…

The fifth is the ‘cold precision forging method’…

…

"Chen Aiqing, please get up quickly." Zhao Ji stepped forward, helped Chen Gui up with his own hands, patted his shoulder enthusiastically, and said:

"Chen Aiqing is both intelligent and courageous, with outstanding talents. He is a genius in firearms manufacturing..."

Hearing this, Chen Gui was so excited that he burst into tears and murmured:

"I would like to thank Your Majesty for the compliment. However, it is difficult for me to accept such praise.

Wei Chen led the craftsmen in the firearms manufacturing workshop and was able to develop so many firearms, all thanks to the firearms manufacturing design drawings given by His Majesty!"

"Hahaha..." Zhao Ji laughed loudly and then said:

"Chen Aiqing, although I am interested in the development of firearms and have drawn many firearm design drawings, after all, I am busy with political affairs and cannot do it myself, so I need help.

Chen Aiqing and Li Aiqing, as well as the craftsmen in the firearms manufacturing workshop, are my right-hand men who want to strengthen the ordnance!"

Chen Gui and Li Ji immediately knelt down, kowtowed and said:

"I am willing to do my best for Your Majesty! Long live my emperor!"

Dozens of representatives of craftsmen from the firearms manufacturing workshop also knelt down and kowtowed, shouting in unison:

"We are willing to do the hard work of dogs and horses for Your Majesty! Long live my emperor..."

Zhao Ji nodded with satisfaction and said loudly: "Everyone loves you."

Everyone stood up...

Zhao Ji gave Chen Gui the secret of firearms manufacturing:

"The method of making musket hall lines can also be used in the barrel of the gun."

“Also, whether it is a musket or an artillery piece, with suitable rifling, its range will be longer and its hit accuracy will be higher;

However, if you still use the front-loading method, the friction will increase due to the rifling. Even if you use the method I gave you to wrap the projectiles with oily linen cloth, the speed will become slightly slower.

Some."

Chen Gui, the first person to make muskets, suddenly realized it again when he heard Zhao Guanjia's words. He felt that Zhao Guanjia had thought too carefully.

Zhao Guanjia’s words make sense!

Chen Gui frowned and tried hard to think of a solution...

However, even though Chen Gui was extremely clever, he couldn't come up with a good solution for a while.

Zhao Ji smiled slightly and said, "I have a few good ideas!"

Firearms manufacturing envoy Chen Gui and deputy envoy Li Ji were both amazed at how smart the Zhao Guan family was!

The two of them thought about the things that gave them a lot of headaches. Zhao Guanjia was able to think of a good solution in a blink of an eye. He was really a genius!

Chen Gui and Li Ji look forward to Zhao Guan's family coming up with a good solution to the problem...
Chapter completed!