A destructive-force-enhanced projectile comprising an auxiliary penetrator equipped with a slotted braid formed to produce jacket fragments.

Abstract

The present invention relates to a bullet with increased destructive power having an auxiliary penetrator formed with a cutting blade for generating jacket fragments, which maximizes jacket fragmentation and improves flight stability through the process of the auxiliary penetrator's detachment upon impact with a target. The bullet (1) according to the present invention includes an outer jacket (30), an inner slug (20), and an auxiliary penetrator (10) coupled to a leading head portion (110). The auxiliary penetrator (10) is equipped with two or more cutting blades (100) arranged evenly along the circumferential direction on the outer surface. In particular, the auxiliary penetrator (10) can be variably coupled so as to be exposed to the outside of the jacket or located on the inside. At the moment the bullet contacts a target, the auxiliary penetrator (10) separates and detaches ahead of the jacket (30), and in this process, the cutting blade (100) formed on the auxiliary penetrator evenly divides and cuts the leading portion of the jacket. As a result, the jacket disperses into a number of uniform fragments, generating a high-density lethal effect (A) inside the target. In addition, the entire bullet rotates as a single unit through a rotational moment synchronization structure that transmits the rotational force of the jacket to internal components, thereby suppressing yaw and vibration during flight and simultaneously improving effective range and hit rate. Consequently, the present invention provides a bullet with a new structure that overcomes the limitations of conventional technology and dramatically increases penetration power, lethality, and flight stability.

Description

Technology Field

[65535] The present invention relates to a destructive power-enhancing bullet having an auxiliary penetrator formed with a cutting blade for generating jacket fragments, and more specifically, when striking a target, the auxiliary penetrator (10) separates and detaches ahead of the jacket (30). According to movement It belongs to the field of technology. The auxiliary penetrator (10) may be coupled so as to be exposed to the outside at the tip head portion (110) or located inside the jacket (30), and at the moment of impact, the cut braid (100) formed on the auxiliary penetrator (10) is attached to the tip portion of the jacket (30). By evenly cutting and dividing to spread into multiple fragments It is characterized by a warhead structure that provides a high-density lethal effect inside the target. In addition, by synchronizing and transmitting the high-speed rotational force of the jacket (30) to the auxiliary penetrator (10) formed with the internal slug (20) and the cut blade (100), the entire warhead rotates as a single unit, thereby suppressing yaw angle and vibration during flight and maintaining a stable flight trajectory. This falls under the technical field of simultaneously improving the effective range, hit rate, and penetration power of the warhead. The present invention can be widely utilized in the design of new warhead structures requiring high destructive power and flight stability in the military and defense industries, ballistics and aerodynamics, weapon system design, etc. Background Technology

[0002] Various structures have been proposed for conventional bullets to ensure penetration power against targets or to impart a certain level of dispersion effect. For example, hollow-point or soft-point bullets increase lethality by causing the tip to expand or fragment upon contact with a target, while armor-piercing projectiles focused on increasing armor penetration capability through hard penetrators. However, conventional technologies have limitations in simultaneously satisfying both penetration power and lethality. In particular, the jacket may break irregularly upon impact with a target, resulting in uneven fragmentation, or the internal penetrator may [could] with the jacket and enough There was a problem with instability occurring during flight due to a lack of coupling. In addition, although stable rotation must be maintained to increase the effective range and accuracy of the bullet, the conventional structure did not sufficiently transmit the rotational force of the jacket to the internal components, such as the slug or auxiliary penetrator. As a result, yaw angle and vibration occurred during flight, leading to repeated problems of reduced trajectory consistency. Therefore, a new structure is required in which the jacket is divided and fragmented more evenly upon impact with a target to provide a high-density lethal effect, while the jacket and internal components share the same rotational force during flight to maintain stability.

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[0006] The present invention relates to a destructive power-enhancing bullet equipped with an auxiliary penetrator having a cutting blade formed for generating jacket fragments, aiming to solve the problems of reduced lethality caused by penetration variation and irregular fragmentation inherent in conventional bullet designs. Conventional warheads focused solely on ensuring flight stability through the assembly of parts or the shifting of the center of gravity. However, such static structures failed to control the random destruction of the jacket upon impact with a target; consequently, impact energy was not concentrated within the target but dispersed in all directions, resulting in a rapid decrease in actual destructive power. Furthermore, it was difficult to simultaneously satisfy the high penetration performance required in both terrestrial and underwater environments. Accordingly, the present invention aims to improve flight stability and extend the effective range by synchronizing the rotational force of the jacket with the internal components (slug and cut blade) upon firing to induce the integral rotation of the entire warhead, while also maximizing penetration and destructive power by designing the jacket tip to be evenly divided by the cut blade formed in the auxiliary penetrator to spread high-density fragments into the target.

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[0009] The present invention is configured so that, at the moment the bullet (1) contacts the target, the auxiliary penetrator (10), having a cut blade (100) formed therein, separates and detaches by moving forward ahead of the jacket (30). The auxiliary penetrator (10) is positioned so that it is exposed to the outside from the tip head portion (110) or is located inside the jacket (30). It can be combined.Two or more cutting blades (100) are evenly arranged on the outer surface of the auxiliary penetrator (10) in a circumferential direction, and are designed so that when the auxiliary penetrator (10) is disengaged, the cutting blades (100) physically and directly press the leading edge of the jacket (30) to evenly divide and cut it. Accordingly, the jacket (30) is evenly spread apart by the frontal pressure transmitted from the target and the cutting action of the auxiliary penetrator, and as a result, the leading edge of the jacket is separated and spread into multiple fragments to form a circular cutting area (A) that provides a high-density lethal effect inside the target. Furthermore, the present invention maximizes penetration power by providing a jacket concentration groove (12) formed on the outer surface of the auxiliary penetrator (10), a slug concentration groove (13) and a slug push engraved groove (13') formed on the contact surface between the auxiliary penetrator and the slug (20), thereby concentrating the inertial energy of the jacket (30) and the slug (20) to the central axis and the tip end (10A', 20A") of the auxiliary penetrator upon impact. In addition, a rotational moment synchronization structure is provided between the jacket (30) and the internal components (slug and auxiliary penetrator) so that the high-speed rotational force of the jacket is uniformly transmitted internally upon firing. Along with this, through the recess groove (132) of the boat tail section (130) and the engraved outer diameter groove (31) of the bore contact intermediate section (120), yaw angle and vibration during flight are suppressed, the effective range is extended, and the hit rate is improved. In conclusion, the present invention overcomes the limitations of conventional bullets and the auxiliary penetrator It provides a new warhead structure capable of simultaneously securing penetration power, lethality, and flight stability through active cutting action.

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[0013] The bullet according to the present invention provides the following significant effects by having an active cutting structure formed by the prior detachment of an auxiliary penetrator and a cutting braid. First, it maximizes destructive power and lethality within the target. At the moment the bullet strikes the target, the auxiliary penetrator (10) separates and detaches before the jacket (30), and the cutting braid (100) on the outer surface cuts the leading edge of the jacket Cut and divide evenlyAs a result, unlike the conventional irregular destruction method, the jacket maintains its original shape and disperses into uniform fragments, forming a high-density cut area (A). It was confirmed through test gelatin firing results (CC, CC', CC") that this has a dramatically improved destruction width and length compared to conventional technology. Second, penetration performance is significantly improved through the concentration of impact energy. Through the organic combination of the jacket concentration groove (12) of the auxiliary penetrator (10), the slug concentration groove (13) on the slug (20) side, and the slug push engraved groove (13'), the inertial energy of the jacket and slug generated upon impact is concentrated at the tip of the auxiliary penetrator (10A', 20A"). This energy concentration structure provides excellent performance capable of penetrating even high-strength bulletproof vest plates of International Standard (NIJ) LEVEL-III and IV. Third, flight stability and hit rate are dramatically improved. The rotational force of the jacket (30) is designed to be perfectly synchronized and transmitted to the internal slug (20) and the auxiliary penetrator (10), so that the entire projectile rotates as a single unit, thereby suppressing the yaw angle and vibration during flight. Additionally, the center of gravity (CG) is shifted forward by adjusting the specific gravity of the slug, and drag is reduced through the recess groove (132) of the boat tail section (130), thereby extending the effective range and ensuring precise accuracy even during long-range firing. Fourth, it extends the lifespan of the firearm and increases manufacturing efficiency. The engraved outer diameter groove (31) formed in the intermediate bore contact section (120) reduces the contact area with the barrel, thereby suppressing the generation of frictional heat and providing the additional effect of extending the lifespan of the barrel. Furthermore, the structure allowing positional variability (exposed or embedded) of the auxiliary penetrator has the advantage of being flexibly applicable to various ammunition types and manufacturing processes.

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[0019] delete Brief explanation of the drawing

[0020] FIG. 1-A is a drawing showing an embodiment protruding to the outside of an auxiliary penetrator (10) having a cut blade formed thereon, showing the jacket concentration groove (12) and the slug concentration groove (13). FIG. 1-B is a drawing showing an example implemented inside the jacket of an auxiliary penetrator (10) having a cut blade formed thereon, showing the jacket concentration groove (12) and the slug concentration groove (13). FIG. 2 is a drawing showing the combination of an auxiliary penetrator and a slug, illustrating various embodiments within the tip head portion of a structure in which an auxiliary penetrator (10) with a cut blade formed thereon is embedded inside. FIG. 3 is a drawing showing the combination of an auxiliary penetrator and a slug, illustrating an embodiment in which an auxiliary penetrator (10) with a cut blade formed thereon is combined with a slug at the tip head and combined with an external jacket in a structure in which the auxiliary penetrator is exposed to the outside. FIG. 4 is a diagram showing the flow of force that concentrates the energy of the jacket and the energy of the slug to the end of the auxiliary penetrator in a structure in which the auxiliary penetrator (10) with the cut blade formed for the purpose of the present invention is exposed to the outside. FIG. 5 is a diagram showing the flow of force that concentrates energy from the force of the jacket and the energy of the slug to the end of the auxiliary penetrator in a structure in which the auxiliary penetrator (10), which is the purpose of the present invention, has a cut blade formed thereon and is wrapped in a jacket inside. Figure 6 is a plan view illustrating the structure, location, and length of the recess groove of the aerodynamic base of the warhead, which explains the flight stability of the warhead. It visually represents the aerodynamic performance of the warhead during flight and explains the shift in the center of gravity and stability during flight. FIG. 7 shows an embodiment in which indented outer diameter grooves (31) at regular intervals are formed to reduce the contact area between the jacket and the gun barrel contact part in order to reduce frictional heat of the gun barrel. FIG. 8 is a drawing of an embodiment showing a cutting area that increases destructive power within a target, wherein a bullet flying through the barrel contacts a target, and an auxiliary penetrator exits the jacket while evenly cutting the leading edge of the jacket by means of a cutting blade formed on the auxiliary penetrator, thereby forming an evenly cut area (A) on the leading edge of the jacket. Fig. 9-A is a photograph showing the degree of destructive power of a conventional bullet against test gelatin in terms of BB (width) and BB' (length). Figure 9-B is a photograph showing the degree of destructive power of the bullet of the present invention being stronger than that of 9-A, with CC (width), CC' (length), and CC" (jacket) of the test gelatin. FIG. 10 is a diagram and results illustrating an example of the results of testing a conventional bullet and the bullet of the present invention according to the level standards of the International Standard (NIJ). Specific details for implementing the invention

[0021] Embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0022] The present invention applies, for example, to relatively small caliber bullets used in small gun barrels such as pistols, rifles, and machine guns, relatively large caliber bullets used in cannons, howitzers, mortars, and large guns or artillery weapons such as those installed on tanks, fighter aircraft (including all aircraft), battleships, and submarines.

[0023] Examples of bullets include bullets, shells, and materials fired from weapons using propellants.

[0024] In addition, it can be applied not only to weapons that use gunpowder as a propellant but also to projectiles fired from weapons such as railguns that use magnetic fields.

[0025] The present invention relates to a bullet with enhanced lethality equipped with a braided structure auxiliary penetrator and a split jacket. A bullet (1) according to a preferred embodiment of the present invention comprises a tip head portion (110), a bore contact intermediate portion (120), and a boat tail portion (130). An auxiliary penetrator (10) having a cutting braid (100) formed thereon is located in the tip head portion (110), and the auxiliary penetrator (10) may be mounted either embedded inside the jacket (30) or partially protruding to the outside. Two or more cutting braids (100) are evenly arranged in the circumferential direction and perform a key role of evenly cutting and splitting the tip portion of the jacket at the moment of contact with a target. At the moment the bullet contacts the target, the auxiliary penetrator (10) is configured to separate and detach ahead of the jacket (30). In this process, the cutting braid (100) of the auxiliary penetrator [cuts] the tip portion of the jacket (30) It is cut and divided evenly according to the segments.Accordingly, the jacket spreads out in a circular shape due to frontal pressure and disperses into multiple fragments, forming a high-density lethal zone (A) inside the target. A slug (20) is placed inside the bore contact middle section (120), and this is formed of a material with a lower specific gravity than the auxiliary penetrator (10) to shift the center of gravity of the bullet forward and improve flight stability. In addition, the cut blade (100) structure effectively transmits rotational force from the rifling to internal components, thereby inducing the entire bullet to rotate as a single unit, which increases flight stability and accuracy. To concentrate the energy of the jacket to the auxiliary penetrator (10), the present invention includes a special groove structure. A jacket concentration groove (12) is formed on the outer surface of the auxiliary penetrator (10) to induce a force (10A) that transmits the energy of the jacket to the center of the auxiliary penetrator, and then concentrates (10A') it to the tip end of the auxiliary penetrator. A slug concentration groove (13) and a slug push engraved groove (13') are provided on the cross-section in contact with the slug (20) to transfer the inertial energy (20A) of the slug through the center (20A') of the auxiliary penetrator to the leading end (20A"). This energy concentration mechanism solves the conventional problem where energy is lost as the jacket is pushed outward upon impact, thereby providing maximized penetration power. The boat tail section (130) has a shape in which the diameter gradually decreases, and a plurality of recess grooves (132) are formed at equal intervals on the outer surface. Each recess groove has a sloped structure that becomes deeper toward the bottom, thereby suppressing wake vortices during flight and reducing drag, thereby extending the effective range. Additionally, an engraved outer diameter groove (31) is formed on the outer surface of the intermediate section (120) in contact with the barrel to reduce the contact area with the barrel, thereby suppressing frictional heat and extending the barrel life. The bullet according to the present invention is made of the material of the auxiliary penetrator (10). Flight stability can be optimized by selecting a high-density metal such as tungsten alloy and a low-density material such as aluminum alloy for the slug (20) material, and the jacket is made of a soft metal such as copper so that it can be easily divided evenly by a braid.Consequently, the present invention simultaneously improves penetration power, lethality, range, and hit rate through the active cutting action of the auxiliary penetrator and the energy concentration structure.

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[0040] The components required to implement this and the description through drawings are as follows.

[0041] FIG. 1 is a drawing showing the appearance of a cut blade (100) formed in an auxiliary penetrator structure that increases penetration power by concentrating energy according to a first embodiment of the present invention. The auxiliary penetrator (10) having such a cut blade formed therein is located in the tip head portion of FIG. 6, and the bullet (1) includes a tip head portion (110), a barrel contact middle portion (120), and a boat tail portion (130).

[0042] The above-mentioned tip head portion (110) may have a shape that has a substantially streamlined nose, an ogive shape, an arched step, or a supercavitation auxiliary penetrator (underwater projectile), and may have a cut braid (100) formed with two or more balanced braids on the upper or lower portions of the circumference to reduce air resistance or air drag, and may have a structure in which a slug is combined with a shape corresponding to the shape of FIG. 2-A and FIG. 2-B located at the tip inside the jacket and can be wrapped with the jacket to complete the structure, and the auxiliary penetrator as in FIG. 1-A is combined with a slug as in FIG. 3 and has a shape that is exposed to the outside when combined with the outer jacket.

[0043] In addition, when manufacturing a bullet, in the case of a bullet in which the cut braid of the auxiliary penetrator (10) is inside, it is inserted into the jacket and combined, and in the case of a bullet in which the auxiliary penetrator protrudes outward, when the jacket is combined by the braid formed at the bottom of the auxiliary penetrator, the jacket is formed by a partial cut of the jacket equal to the number of braids formed on the outer surface in a balanced manner, so that after the auxiliary penetrator is removed from the target, the front end of the jacket spreads out in a balanced manner, and the energy contained in the bullet strikes the target, thereby generating a more powerful destructive force.

[0044] As shown in FIG. 6, the bore contact intermediate section (120) may be a straight section with a complete diameter. The bore corresponds to the diameter of the bore contact intermediate section (120). The bore contact intermediate section (120) is made of a metallic or non-metallic material, such as copper or gilding metal, to limit or prevent forward loss of gas around the bullet (1) along with the rifling of the barrel, and to be in close contact with the outer jacket so that the internal auxiliary penetrator does not shake during flight or the internal auxiliary penetrator can have the rotational force of the bullet together with it.

[0045] Additionally, the boat tail portion (130) has a boat tail shape in which its diameter gradually decreases. The boat tail portion (130) includes one or more recess grooves (132).

[0046] The recess grooves (132) can be formed with an equal and constant spacing between them. Each recess groove (132) extends from a portion of the outer diameter end of the bore contact middle section (120) to the bottom surface of the bullet (1) and may be substantially straight.

[0047] FIG. 1 is a drawing showing an embodiment in which a cut blade is formed on the shapes of an auxiliary penetrator (10) in which a cut blade is formed.

[0048] In order to concentrate all the energy of the jacket into the auxiliary penetrator (10) formed with a cut blade at the moment the bullet contacts the target, the structure must be improved compared to conventional bullets, in which energy is lost and peeled off due to the phenomenon where the jacket is pushed out of the auxiliary penetrator (10) formed with a cut blade at the moment it contacts the target. There was also a disadvantage that the fragments generated as the jacket peeled off were randomly separated, resulting in reduced destructive power.

[0049] In the present invention, energy concentration is sought to increase penetration power at the moment when the jacket and auxiliary penetrators come into contact with the contact surface, and subsequently, when the auxiliary penetrator separates from the target and detaches, the jacket is cut evenly according to the number of cut blades formed on the auxiliary penetrator, and as it proceeds to penetrate the target, the leading edge of the jacket spreads evenly, thereby concentrating the energy of the bullet into the target and delivering a powerful destructive power.

[0050] In addition, the jacket concentration groove (12) formed in the auxiliary penetrator as shown in FIG. 4 to concentrate the force directed at the jacket into energy for penetration into the auxiliary penetrator may have various shapes, for example, the jacket concentration groove (12) may have a cross-sectional shape of a semicircle, semi-ellipse, or semi-oval, or may have a cross-sectional shape of a polygon such as a rectangular or triangular shape.

[0051] FIG. 2 shows a drawing of the combination of an auxiliary penetrator and a slug, showing various embodiments within the tip head section in a structure in which an auxiliary penetrator (10) with a cut blade formed thereon is embedded inside.

[0052] As shown in the drawing, a groove is formed in the cross-section where the slug and the auxiliary penetrator are combined so that the energy of the slug can also be transferred to the auxiliary penetrator at the moment of contact with the target, and the energy of the slug is instantaneously concentrated on the central axis of the auxiliary penetrator (10) in which the cut blade is formed.

[0053] Through this, the energy in the jacket is combined with an auxiliary penetrator (10) having a cut blade formed as shown in Fig. 5, with a gap larger than the inner diameter of the jacket, and the jacket is pushed inward into the corresponding area during manufacturing to prevent the jacket from coming off or tearing at the moment of contact with the target and to concentrate the energy.

[0054] FIG. 3 is a drawing showing the combination of an auxiliary penetrator (10) with a cut blade formed thereon and a slug (20), in which the auxiliary penetrator (10) with a cut blade formed thereon is combined with a slug and an external jacket, in a structure in which the auxiliary penetrator (10) with a cut blade formed thereon is exposed to the outside.

[0055] An auxiliary penetrator (10) formed with a cut blade is configured with a jacket concentration groove (12) that performs the same function as a bullet, such as a structure in which the auxiliary penetrator (10) is embedded inside, and the jacket concentrates energy into the auxiliary penetrator.

[0056] A slug concentration groove (13) is also provided on the cross-section in contact with the slug connected to the lower end of the auxiliary penetrator (10) having a cut blade formed thereon, and the slug forms a slug push engraved groove (13'), so that energy is concentrated in a part of the space at the moment the bullet contacts the target, allowing all the force of the slug to be transferred to the auxiliary penetrator (10) having a cut blade formed thereon.

[0057] The depicted slug concentration groove (13) and slug push engraved groove (13') may have various shapes, for example, the slug concentration groove (13) and slug push engraved groove (13') may have a cross-sectional shape that is semicircular, semi-elliptical, or semi-oval, or may have a cross-sectional shape that is polygonal, such as a rectangular or triangular cross-sectional shape.

[0058] As shown in FIG. 4, when looking at the flow of power that concentrates energy into the auxiliary penetrator (10) with the cut blade formed thereon, the energy of the jacket (30) can be concentrated into the center of the auxiliary penetrator (10) with the cut blade formed thereon through the power (10A) that transmits the energy of the jacket to the center of the auxiliary penetrator (10) with the cut blade formed thereon, and the energy of the jacket can be concentrated into the end of the front end of the auxiliary penetrator (10) with the cut blade formed thereon through the power (10A) that transmits the energy of the jacket to the end of the front head portion of the auxiliary penetrator (10) with the cut blade formed thereon.

[0059] In addition, the energy of the slug (20) is concentrated instantaneously through a force (20A) that concentrates the slug energy, which then flows into a force (20A') that transmits the slug energy to the center of the auxiliary penetrator, and finally, the force (20A”) that concentrates the slug energy to the end of the leading head of the auxiliary penetrator is combined with the force (10A') that directs the energy of the jacket to the end of the leading head of the auxiliary penetrator to obtain a stronger penetrating power (destructive power).

[0060] FIG. 5 is an example of one of several forms of an auxiliary penetrator (10) in which a cut blade is formed inside a jacket (30) with a structure similar to FIG. 4, showing the flow of energy concentration, and functions in the same way as the previously described components.

[0061] FIG. 6 is a plan view illustrating the structure, location, and length of the recess groove (132) of the aerodynamic base of the warhead, which explains the flight stability of the warhead. It visually illustrates the aerodynamic performance of the warhead during flight and explains the center of gravity shift and stability during flight.

[0062] As shown in FIG. 6, the length (Lg) of the recess groove (132) is greater than the length (Lt) of the boat tail portion (130), and the gap must be greater than or equal to Lg - Lt = (L / 2.5 ~ L / 9) - (L / 3 ~ L9).

[0063] The recess groove (132) shown in FIG. 6 may have various shapes, for example, the recess groove (132) may have a cross-sectional shape that is semicircular, semi-elliptical, or semi-oval, or may have a cross-sectional shape that is polygonal, such as a rectangular or triangular cross-sectional shape.

[0064] The width of the upstream portion of the recess groove (132) may be substantially the same or different from the width of the downstream portion. In the example of FIG. 1, the width of the upstream portion is smaller than the width of the downstream portion.

[0065] Likewise, the depth of the upstream section and the depth of the downstream section may be substantially the same or different. It is preferable that the depth of the recess groove (132) gradually increases as it goes downward.

[0066] Compared to conventional bullets, the bullet of the present invention is released while adhering to the surface of the outer diameter of the bullet at the moment the compressed gas is released from the muzzle, thereby providing the effect of stabilizing the flight of the bullet from the moment it leaves the muzzle.

[0067] The length (Lt) of the boat tail portion (130) is preferably L / 9 to L / 3 of the length (L) of the bullet (1), and the length (Lg) of the recess groove (132) is preferably Ld greater than the length of the boat tail portion (130). The preferred dimensions are as shown in the following formula (1).

[0068] ---------------- (1)

[0069] The bullet of the conventional technology experiences irregular airflow, such as vortices generated behind the boat tail, which reduces the bullet's flight force.

[0070] However, since the bullet (1) of the present embodiment includes one or more recessed grooves (132) having a structure as described above, air flows into the bottom surface of the bullet (1) along the grooves, and irregular airflow such as vortices does not occur or is reduced.

[0071] In addition, for optimal flight as described above, the contact surface of the outer diameter of the jacket contacting the gun barrel is reduced as shown in Fig. 7 to reduce frictional heat with the gun barrel, and the configuration is made to have a contact surface that synchronizes all rotational forces of the wire.

[0072] Accordingly, the bullet (1) flies stably toward the target with a significantly small angle of descent, and the effective range, accuracy, and destructive power of the bullet (1) are significantly increased. In addition, recoil is reduced because the gas can be discharged uniformly in the initial stage.

[0073] If we include further explanations regarding the materials in A and B of Fig. 2,

[0074] The auxiliary penetrator (10) can be manufactured from a material with a relatively higher specific gravity than the slug (20).

[0075] In this case, the auxiliary penetrator (10) formed with the cut blade can be made of a metal or non-metal material with a higher specific gravity than the jacket, one or more materials selected from the group consisting of iron (Fe)-carbon (C) alloy, tungsten carbide (WC) alloy, alloy steel, aluminum (Al) alloy, copper (Cu), copper (Cu) alloy, stainless steel or alloy, cast iron, tungsten (W) alloy, chromium (Cr) steel, molybdenum (Mo) alloy, Ni-Cr-Mo alloy, uranium (U) alloy, 5Cr-Mo-V alloy, and 5Ni-Cr-Mo-V alloy.

[0076] The slug (20) can be made of a metal or non-metal material with a lower specific gravity than the auxiliary penetrator (10) in which the cut blade is formed, for example, an Al-based alloy, stainless steel, carbon (C), reinforced plastic, reinforced resin, non-ferrous metal, or acrylonitrile butadiene styrene (ABS) material, and a non-metal and metal material with a lower specific gravity than the copper jacket.

[0077] The auxiliary penetrator (10) and slug (20) formed with the cut blade can also be made of the same material, for example, iron (Fe)-carbon (C) alloy, tungsten carbide (WC) alloy, alloy steel, aluminum (Al) alloy, copper (Cu), copper alloy, stainless steel, cast iron, tungsten alloy, chrome steel, molybdenum (Mo) alloy, Ni-Cr-Mo alloy, uranium (U) alloy, 5Cr-Mo-V alloy, 5Ni-Cr-Mo-V alloy, reinforced plastic, reinforced resin, non-ferrous metal, or acrylonitrile butadiene styrene (ABS) material.

[0078] In addition, the auxiliary penetrator (10) and jacket, which have cut blades formed thereon, can be made as a single unit or can be made of the same material as the jacket even if separated.

[0079] As shown in FIG. 3, the shape of the auxiliary penetrator (10) and slug (20) with the cut blade formed is determined such that the center (CG) of the bullet (1) is located between the center point of the bullet (1) and the center of pressure (CP).

[0080] When a jacket (30) is formed, the jacket (30) may be made of one or more materials selected from the group consisting of a soft material with a specific gravity equal to or smaller than that of the auxiliary penetrator (10) in which the cut braid is formed, for example, copper (Cu), a Cu-based alloy, and an Al-based alloy.

[0081] By selecting materials for the auxiliary penetrator (10) and slug (20) with the cut blade formed thereon, and by adjusting the specific gravity or shape of the auxiliary penetrator (10) and slug (20) according to the location of the center of pressure (CP), the center of gravity (CG) of the bullet (1) can be positioned between the center point of the bullet (1) and the center of pressure (CP). The location of the center of pressure (CP) varies depending on the shape of the tip head portion (110) of the bullet (1), the length of the bullet (1), etc. The location of the center of pressure (CP) can be calculated using various methods.

[0082] For example, in the case of a bullet with an elliptical tip head, the position of the center of pressure (CP) can be calculated using the following equation (2).

[0083] -------------------- (2)

[0084] Here, C represents the diameter of the bullet.

[0085] In the case of a bullet having a parabolic tip head, the position of the pressure center (CP) can be calculated using the following equation (3).

[0086] ----------------- (3)

[0087] Here, C represents the diameter of the bullet.

[0088] That is, in the case of a bullet having an elliptical tip head, it is desirable for the center (CG) to be located within half the bullet length from the end of the tip head, and in the case of a bullet having a parabolic tip head, it is desirable for the center (CG) to be located within one-third of the bullet length from the end of the tip head.

[0089] It was confirmed that the auxiliary penetrator of the bullet of the present invention cuts the upper part of the jacket as it detaches from the jacket and spreads evenly within the target, producing a large destructive power, and that the gelatin used for test evaluation as shown in FIG. 9 increases the destructive power more strongly than that of a conventional bullet.

[0090] FIG. 8 shows an embodiment in which a bullet flying through the barrel contacts a target, and an auxiliary penetrator exits the jacket while evenly cutting the leading edge of the jacket with a cutting blade formed on the auxiliary penetrator, thereby forming an evenly cut area (A) on the leading edge of the jacket, which increases the destructive power within the target.

[0091] In order to directly verify the destructive power of these bullets

[0092] This can be confirmed by the gelatin firing results for the test as shown in Fig. 9.

[0093] It was confirmed that the uniformly cut area of ​​the bullet jacket of the present invention spreads evenly, thereby concentrating the energy of the bullet to the maximum target, and that the bullet of the present invention penetrates with a greater width and length compared to the direct cavity length and width of conventional bullets, and it was also confirmed that the jacket spread as shown in CC of 9-B does not fragment into a single mass, and maintains its original shape with force up to the maximum distance of the target.

[0094] FIG. 10 shows the results of verifying the degree of destructive power of conventional bullets and the bullets of the present invention tested according to the level standards of the International Standard (NIJ). Conventional bullets (two types: 5.56 / 7.62 mm) penetrate bulletproof vests at normal strength, but none penetrated at NIJ- LEVEL III and IV levels, which have high strength. In particular, they did not penetrate at a test distance of 15m.

[0095] As a result of firing the bullet of the present invention at the same level as described above, it was confirmed that the bullet of the 5.56 mm embodiment penetrated at the test standard distance of 15 m, and even at an unspecified distance of 100 m, the 7.62 mm bullet penetrated the highest grade bullet plate of LEVEL-IV, demonstrating excellent performance.

[0096] As described above, in the bullet (1) according to the present embodiment, it is preferable to select the materials of the auxiliary penetrator (10) and the slug (20) and adjust the specific gravity or shape of the auxiliary penetrator (10) and the slug (20) according to the position of the center of pressure (CP) so that the center of gravity (CG) of the bullet (1) is positioned between the center point of the bullet (1) and the center of pressure (CP). Accordingly, the angle of descent is reduced, and the range, accuracy, and destructive power are greatly improved.

[0097] As described above, according to the present invention, it is possible to provide a bullet with strong destructive power utilizing the uniform spreading effect of the jacket against targets such as the human body, with extended range, high accuracy, and especially, destructive power.

[0098] The preferred embodiments of the present invention are for illustrative purposes only, and the scope of the present invention is not limited to the specific examples described above. It will be apparent to those skilled in the art that various modifications and variations may be made without departing from the spirit and scope of the present invention, as defined in the appended claims. Explanation of the symbols

[0099] 1 : Bullet 10: Auxiliary penetrator with a cut blade 12 : Jacket Focus Home 13 : Slug Concentration Home 13' : Slug push engraved groove 10A: The force that transfers the jacket's energy to the center of the auxiliary penetrator 10A': Force that directs the jacket's energy to the tip of the auxiliary penetrator's leading head. 20: Slug 20A: Power to concentrate slug energy 20A': Force that transmits slug energy to the center of the auxiliary penetrator 20A": Force that concentrates slug energy to the tip of the auxiliary penetrator's leading head. 30 : Jacket 31: Engraved outer diameter groove 100 : Incision braid 110: Tip head section 130 : Boattail section 120 : Middle part of the bore contact 132 : Recess Home A: After the bullet (1) contacts the target, the auxiliary penetrator detaches while spreading the upper part of the jacket evenly, creating an evenly spread area. BB: The vertical width of the direct cavity where a conventional bullet confirms the gelatin destructive power. BB': Approximately the length of the direct cavity where a conventional bullet confirms the gelatin destructive power. CC: The vertical width of the direct cavity used to verify the gelatin destructive power of the bullet of the present invention. CC' : The length of the direct cavity confirming the gelatin destructive power of the bullet of the present invention CC” : A jacket in which the upper part of the jacket, which confirms the gelatin destructive power of the bullet of the present invention, is evenly cut and the circular shape is maintained. C: Outer diameter of the middle section of the bore contact (outer diameter of the bullet) CL: Centerline of the bullet Lt: Length of the boattail section of the bullet Ld : Length further ahead of the intermediate bore contact

Claims

Claim 1 In a destructive power-enhancing bullet having an auxiliary penetrator formed with a cut blade for generating jacket fragments, It includes a tip head section (110), a gun barrel contact intermediate section (120), and a boat tail section (130); and an auxiliary penetrator (10) is positioned in the tip head section (110). The above auxiliary penetrator (10) comprises two or more cut braids (100) arranged evenly along the circumferential direction on the outer surface, and is exposed to the outside or of the jacket (30). interior Located at go; A slug (20) is formed inside the above-mentioned bore contact intermediate section (120) and boat tail section (130); the above-mentioned auxiliary penetrator (10) includes a jacket concentration groove (12) and a slug concentration groove (13), and a slug push engraved groove (13') is formed in the slug (20), so that at the moment the bullet (1) contacts the target, the material forming the bore contact intermediate section (120) is drawn into the jacket concentration groove (12) and the material of the slug (20) is drawn into the slug concentration groove (13), thereby increasing the instantaneous penetration energy; The above bullet (1) is aimed at the target contact At that moment, the auxiliary penetrator (10) is compared to the jacket (30). First, as it separates and detaches, the cutting braid (100) evenly cuts and divides the leading edge of the jacket (30) in a circular shape and spreads it into multiple fragments, thereby increasing the destructive power. A destructive power-enhancing bullet having an auxiliary penetrator formed with a cut blade for generating jacket fragments, characterized by Claim 2 In claim 1, the slug (20) is The material of the above-mentioned gun barrel contact intermediate part (120) and It is formed of a material with a relatively lower specific gravity than the auxiliary penetrator (10), thereby shifting the center of gravity (CG) of the bullet forward, thereby improving flight stability. and effective range A destructive power-enhancing bullet having an auxiliary penetrator formed with a cut braid for generating jacket fragments characterized by improving. Claim 3 In claim 1, the gun barrel contact intermediate portion (120) includes an engraved outer diameter groove (31) on its outer surface, and with the gun barrel Minimize frictional heat by reducing the contact area and steel wire of Maintain rotational force thing A destructive power-enhancing bullet equipped with an auxiliary penetrator having a cut blade formed for generating jacket fragments characterized by Claim 4 In claim 1, the outer surface of the boat tail portion (130) is provided with recess grooves (132) formed at equal intervals, Vortex generation during flight after launch Suppresses and reduces drag Improve range and accuracy A destructive power-enhancing bullet having an auxiliary penetrator formed with a cut blade for generating jacket fragments, characterized by Claim 5 In claim 1, the cutting braid (100) is the By synchronizing the rotational force of the jacket (30) transmitted to the intermediate part of the bore contact (120) with the rotational force of the slug (20), the entire warhead rotates as a single unit during firing, thereby reducing the yaw angle and vibration during flight. A destructive power-enhancing bullet having an auxiliary penetrator formed with a cut blade for generating jacket fragments, characterized by Claim 6 delete Claim 7 delete

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