CN203190883U

CN203190883U - Rifling with gradually varied screw pitch for gun tube

Info

Publication number: CN203190883U
Application number: CN 201320041559
Authority: CN
Inventors: 王栋
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-25
Filing date: 2013-01-25
Publication date: 2013-09-11
Anticipated expiration: 2023-01-25

Abstract

The utility model provides rifling with gradually varied screw pitch for a gun tube, wherein the rifling with the gradually varied screw pitch is high in safety factor, high in shooting speed and long in service life. The rifling is characterized in that larger screw pitch is arranged on the entrance of the gun tube, smaller screw pitch is arranged on the exit of the gun tube, and the screw pitch achieves gradually varied transition between the entrance and the exit. The gradually varied pitch can stably and gradually accelerate the rotating speed of a bullet, the friction between the bullet and the inner wall of the gun tube is reduced, the rotating resistance of the bullet is reduced, and the movement speed of the bullet in the gun tube is improved.

Description

A kind of rifling with gradient pitch for gun barrel

Technical field

The utility model relates to the firearms technical field, is specifically related to a kind of rifling with gradient pitch for gun barrel.

Background technology

The gun barrel rifling claims rifling again, its role is to give the ability of bullet rotation, makes bullet after going out thorax, still can keep set direction, and stabilized flight increases and runs through dynamics, improves accuracy at target.Rifling concavo-convex line twist in gun barrel, recessed part is called negative line, and the part of projection is called land.

Bullet produces a large amount of heat in the gunpowder explosion that is subjected to clashing into the inside, back in the short time, gas is expanded, and under gas pressure, bullet will be along rifling by the hand of spiral rotation and advance, until stably penetrating at last.The bullet of rotation rotates under the gravitational field effect as gyro, and therefore, rifling can make the bullet accuracy increase, and the bullet that bore is penetrated can be not dilapidated, and can hit the mark exactly.

The rifling of the present firearms Guan Duoyong fixed pitch of using, so-called fixed pitch exports to gun barrel from the gun barrel entrance exactly, and the pitch between the rifling is changeless.Bullet just must be rotated along the rifling of fixed pitch and move when entering the gun barrel entrance like this.In general, gun barrel is more long, and pitch is just more big., pitch long when gun barrel hour, safety coefficient reduces, and has fried thorax risk; Short when gun barrel, when pitch is big, the speed that bullet goes out thorax is low, stability poor, be unfavorable for keeping longer-distance lethality.

So far novel from the rifling technical application, people still also do not obtain revolutionary breakthrough all the time to its improvement.

The utility model content

The purpose of this utility model provides that a kind of safety coefficient height for gun barrel, outgoing speed are big, the rifling with gradient pitch of long service life.

To achieve these goals, the utility model adopts following technical scheme:

A kind of rifling with gradient pitch for gun barrel is provided with bigger pitch in the porch of gun barrel, is provided with less pitch in the gun barrel exit, and the pitch of rifling is implemented in the gradual transition of entrance and exit place pitch.

Wherein, rifling pitch in gun barrel porch is ten times to tens times of fixed pitch of same model gun barrel rifling.

Wherein, rifling pitch in gun barrel exit is the fixed pitch of same model gun barrel rifling.

Beneficial effect

Rifling with gradient pitch of the present utility model is steadily and step by step to dwindle rifling pitch, and bullet can begin rotation by the direction that the gradient pitch rifling draws in the proal while like this.When forward air pressure continued to promote bullet and advances, bullet will steadily and step by step strengthen rotary speed along rifling; In the gun barrel exit, rifling pitch of the present utility model equates that with the rifling pitch of same model gun barrel therefore, when bullet arrived the exit, the rotary speed of bullet had accelerated to the due rotary speed of same model firearms bullet.

Such design makes moment of bullet initial motion in gun barrel, when initial velocity is also smaller, and can be along than the coarse pitch entry into service, progressively improve speed, and needn't bring up to maximum movement velocity in moment by fixing rifling pitch, the kinetic energy of wearing and tearing gun barrel and consume significant.

In addition, from the extremely outlet of gun barrel entrance with fixed pitch rifling, the speed of rotation of bullet in gun barrel is changeless, and bullet has reached the highest in the exit of the gun barrel speed of rotation, after bullet went out gun barrel, its rotary speed will be on a declining curve.And have in the gun barrel of gradient pitch rifling, bullet steadily and step by step strengthens rotary speed along the gradient pitch rifling, and after bullet went out gun barrel, the speed of rotation was also continuing increasing under inertia, just can be on a declining curve behind the certain distance that aloft flies.

The utility model makes the screw type rifling in the gun barrel more become reasonable, the speed that bullet moves in gun barrel is quick more, steady, reduce simultaneously friction, the reduction gun barrel temperature of bullet and gun barrel porch most possibly, greatly prolong the service life of gun barrel.

Angle tens degree of prior art neutron bomb flight path and level in thorax, the utility model neutron bomb angle of flight path and level in thorax be 7 spend about, suffered resistance is less.

Description of drawings

Fig. 1 is the rifling schematic diagram that is used for gun barrel in the prior art;

Fig. 2 is the schematic diagram of the rifling with gradient pitch for gun barrel of the present utility model.

Wherein, the 1st, the angle of prior art neutron bomb flight path and level in thorax; The 2nd, the angle of the utility model neutron bomb flight path and level in thorax.

The specific embodiment

The rifling with gradient pitch for gun barrel of the present utility model is provided with bigger pitch in the porch of gun barrel, is provided with less pitch in the gun barrel exit, and the pitch of rifling is implemented in the gradual transition of entrance and exit place pitch.Wherein, rifling pitch in gun barrel porch is ten times to tens times of fixed pitch of same model gun barrel rifling.Wherein, rifling pitch in gun barrel exit is the fixed pitch of same model gun barrel rifling.Therefore, the number of turns of rifling can greatly reduce in the gun barrel.

Be example with AK-47, the long 415mm of AK-47 gun barrel, pitch 240mm, bullet rotate 416.16 degree in gun barrel.And in the AK-47 gun barrel, with the gradient pitch of the long 415mm of 2400mm/240mm drawing, bullet only rotates 116.3 degree in gun barrel.So just reduced the huge kinetic energy that bullet consumed during high speed in moment, simultaneously because bullet is along the gradient pitch rifling, steadily and step by step strengthen rotary speed, must reduce the friction of bullet and gun barrel inwall, reduce the rotational resistance of bullet, improve the movement velocity of bullet in gun barrel.

It should be noted that at last: obviously, above-described embodiment only is for the application's example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being amplified out thus or change still are among the protection domain of the application's type.

Claims

1. rifling with gradient pitch that is used for gun barrel, it is characterized in that: be provided with bigger pitch in the porch of gun barrel, be provided with less pitch in the gun barrel exit, the pitch of rifling is implemented in the gradual transition of entrance and exit place pitch.

2. the rifling with gradient pitch according to claim 1 is characterized in that: gun barrel porch rifling pitch is ten times to tens times of fixed pitch of same model gun barrel rifling.

3. the rifling with gradient pitch according to claim 1, it is characterized in that: gun barrel exit rifling pitch is the fixed pitch of same model gun barrel rifling.