The Life of a Gangster That Started In a Gun Shop

With these questions in mind, Ye Qing couldn't help showing a hint of sadness on his face.

The plans were all pretty good, and the equipment was all bought. If the porcelain clay produced by the system fails to meet the barrel material standard, Ye Qing would really want to cry.

The first pot of gold that I made, but I smashed it all into it. Although failure is not a complete defeat, it is not much better than returning to before liberation.

But as the saying goes, there is no turning back when you open a bow. Having already come this far, Ye Qing has no way out.

With the cover of going out to dig soil yesterday, Ye Qing can directly exchange a piece of porcelain clay from the system without any worries in the studio. Then began to make embryos according to the barrel size of the P238 pistol.

There are several processing methods for rifling, but no matter which processing method, the barrel needs to be drilled first. Due to the particularity of porcelain, Ye Qing can directly knead a tubular porcelain with a hole in the middle.

Due to the short barrel size of the Xiuzhen pistol, a piece of porcelain soil, Ye Qing, made six barrel embryos. The embryos are then fired into semi-finished ceramic barrels.

After three hours, the firing of the ceramic barrel was completed. Leaving the semi-finished gun barrel in the kiln to cool naturally, Ye Qing walked back to the shop. While thinking about replacing the brick kiln with an electric kiln if it is successful, I made myself a late lunch to reward the five-zang-temple that was undergoing an uprising.

After eating and drinking, let's have another after-dinner cigarette that surpasses the living gods. Take a short break and enjoy the comfort of an autumn afternoon. Ye Qing started to get busy again.

Well, it doesn't count to be busy. Now that the barrel is still cooling, Ye Qing just went to study the rifling machine sent by the CIA.

Speaking of barrel rifling, most people are no strangers. Rifing is also called double-line, and its earliest history can even be traced back to the 15th century. However, due to the constraints of production conditions at that time, there was no wave in history.

Beginning in the 19th century, rifled rifles replaced muskets. Rifling has become an indispensable part of today's firearms.

In the barrel, the concave part is called the Yin line, and the raised part is called the Yang line. Speaking of this, Ye Qing remembered something very interesting, and that was the issue of standards.

Generally speaking, what we call caliber refers to the distance between the Yang line and the Yang line. But there are always some bells and whistles who like to measure the distance between the yin line and the yin line. For example, the .38 caliber and .357 caliber that Ye Qing is about to pull are actually the same caliber, maybe the length of the warhead is different. But the bullet diameter is definitely the same for both calibers.

In addition to caliber, there is no fixed value for the number of rifling in a gun. From 2 rifles for the Springfield Arsenal M1903A3 rifle to 22 for what Marlin calls the MicroGroove. The difference in numbers is a full 11 times.

However, this crazy thing MicroGroove has no practical value, and ordinary guns do not need such an exaggerated number of rifles.

And how many rifles a gun needs in the end, mainly depends on the force conditions of the guide side. Generally speaking, the extrusion stress on the guide side should be between 1/4 and 1/2 of the allowable stress of the barrel material. Different factories and countries have different requirements for this index.

We all know that the function of the rifling is to make the warhead spin. And what exactly makes the warhead spin? The answer is steering force. When the bullet contacts the rifling, it will generate extrusion stress on the side that first contacts the rifling, and the product of this extrusion stress and the contact area is the steering force.

And once the extrusion stress is too large, I want to maintain the original conduction force. There are only two ways, one is to increase the rifling height, and the other is to increase the number of rifling.

As mentioned earlier, the caliber of weapons and ammunition generally refers to the distance between the sun line and the sun line in the gun chamber. Moreover, abruptly increasing the rifling height increases the bending moment at the root of the rifling. Structural strength, fatigue strength and airtightness are all severely affected. In this way, the method of increasing the height of the rifling is naturally useless.

The only way out is to increase the number of rifling and increase the force-bearing area. This is also the origin of different guns and different rifles.

In Ye Qing's motherland, Type 95 and 03 rifles generally have 4 rifles. The weapons on the NATO side are mostly 6 rifles. When looking at this data roughly, Ye Qing seemed to understand some of the guys who sprayed the 95-style rifle on the forum before. After all, a gun with a lot of rifling will have a much longer barrel life, not to mention other things.

However, after a period of in-depth study, Ye Qing found that she was wrong again.

The fundamental reason for this phenomenon lies in the difference between bullets. Most NATO weapons use SS109 rifle cartridges, also known as 5.56*45mmNATO rifle cartridges. In fact, the actual performance of this bullet is not very different from the 5.8mm rifle bullet of Ye Qing's motherland. They are all small-caliber rifle bullets. It's basically a "big brother, don't say second brother" relationship.

But after all, they are two different bullets. The chamber pressure of the SS109 rifle is much higher than that of the domestic 5.8mm rifle, generally around 380 MPa. The 5.8mm rifle bullet is generally less than 300 MPa.

In addition, Ye Qing also found another difference between the two by comparing the Ar15 and 95 foreign trade rifles~www.readwn.com~ style rifles. That's the difference in the rifling pitch.

Rifling pitch refers to the degree of rotation of the rifling. The longer the rifling takes to complete a 360-degree rotation within the barrel, the slower the wrap, and vice versa. For Ar-series guns, the wrapping distance is generally only 178mm, which is much faster than the wrapping distance of the 95-type rifle.

The difference in the bullets used, coupled with the difference in the design concept, has resulted in the difference in the number of rifling between the two weapons. This cannot be used as a basis for judging that the Type 95 rifle is inferior to the Ar-series rifle.

Besides, it is not impossible for the Type 95 rifle to have 6 rifles. But this improvement in the performance of the gun compared to the cost of increasing the rifling is simply a loss to the grandmother's house.

After thinking about these messy things, Ye Qing focused his attention on his rifling machine. Through the top-cone-shaped thing on this equipment with a general pattern of double lines, it is not difficult for Ye Qing to determine that this equipment is used to produce rifling in the ButtonRifling method.

ButtonRifling literally translates to button rifle, so this production method is also called button-type. This method of production is also very simple. The rifling is created by squeezing a button-like object with the opposite shape and rifling through the inside of the barrel at high pressure. However, until now, the button shape has been gradually replaced by the top cone shape.

This method of production cannot be considered good, but it cannot be considered bad either. Although high-precision barrels are generally made by pulling and cutting, but pistols do not need high-precision barrels, right?

Again, compare the other two production methods. Or ButtonRifling is more convenient and more suitable for Ye Qing's current small workshop....

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