Abstract
The present invention relates to a deformation and/or partial fragmentation projectile comprising a jacket and a two-part core arranged within the jacket and having a projectile front-sided core part and a projectile rear-sided core part, the core being attached to the jacket such that the projectile rear-sided core part is more strongly attached to the jacket than the projectile front-sided core part.
Claims
1. A deformation and/or partial fragmentation projectile comprising a jacket and a two-part core arranged inside the jacket and having a projectile front-sided core part and a projectile rear-sided core part, wherein the core is fastened to the jacket such that that the projectile rear-sided core part is fastened more strongly to the jacket than the projectile front-sided core part.
2. The deformation and/or partial fragmentation projectile according to claim 1, wherein the projectile front-sided core part is attached to the jacket such that that upon impact of the projectile with a target, the projectile front-sided core part can detach from the jacket, and/or the rear core part is secured to the jacket such that upon impact of the projectile with a target, the rear core part remains secured to the jacket.
3. Deformation and/or partial fragmentation projectile according to claim 1, wherein the projectile rear core part is at least 5% stronger, preferably at least 10%, 15%, 20%, 25% or at least 30% stronger, attached to the jacket than the projectile front core part.
4. Deformation and/or partial fragmentation projectile according to claim 1, wherein the projectile rear-sided core part is/are made of lead and/or the projectile front-sided core part is/are made of lead and/or tin.
5. Deformation and/or partial fragmentation projectile, in particular according to claim 1, comprising a jacket and a two-part core arranged inside the jacket and fastened thereto, with a projectile front-sided core part and a projectile rear-sided core part, wherein a connection technique for attaching the projectile front-sided core part to the jacket differs at least in sections from a connection technique for attaching the projectile rear-sided core part to the jacket.
6. Deformation and/or partial dismantling projectile according to claim 5, wherein the connection technology for fastening the projectile front-sided core part and the connection technology for fastening the projectile rear-sided core part to the jacket are based, at least in sections, on different physical principles of action, wherein in particular the core part at the rear of the projectile is fastened to the jacket by a material fit, preferably soldered and/or welded and/or glued to the jacket, and/or the projectile front-sided core part is fastened to the jacket by a form fit and/or force fit.
7. Deformation and/or partial fragmentation projectile according to claim 5, wherein the projectile rear-sided core part is attached to the jacket by means of fusion brazing or diffusion brazing.
8. Deformation and/or partial fragmentation projectile according to claim 5, wherein an outer circumferential surface of the projectile rear-sided core part facing the jacket is joined, in particular to more than 5%, preferably to 100% of a total outer circumferential surface of the projectile rear-sided core part, to a jacket inner surface by material bonding, preferably by brazing.
9. A deformation and/or partial fragmentation projectile according to claim 5, wherein the projectile front-side core part is frictionally secured to the jacket, in particular is pressed into the jacket and/or is clamped in the jacket, and/or is secured to the jacket with the formation of an interference fit, wherein in particular a radial interference between projectile front-side core part and jacket is in the range from 0.001 mm to 0.01 mm.
10. A deformation and/or partial fragmentation projectile, in particular a hunting projectile, in particular according to claim 1, comprising a jacket and a two-part core arranged inside the jacket, preferably made of lead and/or tin, wherein a projectile rear-sided core part is soldered to the adjacent jacket and a projectile front-sided core part is substantially unsoldered, preferably pressed in, with respect to the surrounding jacket.
11. A method of manufacturing a deformation and/or partial fragmentation projectile formed according to claim 1.
Description
[0028] In the following, further properties, features and advantages of the invention will become clear by means of a description of preferred embodiments of the invention with reference to the accompanying exemplary drawings, which show:
[0029] FIG. 1 a perspective view of a blank of a jacket of a deformation and/or partial fragmentation projectile according to the invention;
[0030] FIG. 2 a sectional view of the jacket according to FIG. 1;
[0031] FIG. 3 a further perspective view of a jacket of a deformation and/or partial fragmentation projectile according to the invention, according to a downstream processing and/or manufacturing step;
[0032] FIG. 4 a sectional view of the jacket according to FIG. 3;
[0033] FIG. 5 a sectional view of a deformation and/or partial fragmentation projectile according to the invention;
[0034] FIG. 6 a sectional view of a further deformation and/or partial fragmentation projectile according to the invention;
[0035] FIG. 7 a perspective view of the deformation and/or partial fragmentation projectile according to FIG. 6;
[0036] FIG. 8 a sectional view of a further embodiment of a deformation and/or partial fragmentation projectile according to the invention; and
[0037] FIG. 9 a sectional view of a further exemplary embodiment of a deformation and/or partial fragmentation projectile according to the invention.
[0038] In the following description of exemplary embodiments of deformation and/or partial fragmentation projectiles according to the invention, a deformation and/or partial fragmentation projectile is generally provided with the reference numeral 1. In the course of describing the exemplary embodiments of deformation and/or partial fragmentation projectiles 1 according to the invention, the method of manufacturing a deformation and/or partial fragmentation projectile 1 according to the invention is also described schematically.
[0039] With reference to FIGS. 1 to 4, various manufacturing states of a jacket blank provided with reference numeral 3 for a deformation and/or partial fragmentation projectile 1 according to the invention are shown. With reference to FIGS. 5 to 9, exemplary embodiments of deformation and/or partial fragmentation projectiles 1 according to the invention are illustrated.
[0040] FIGS. 1 and 2 show a rotationally symmetrical, preferably substantially cylindrical, jacket blank 3. The jacket blank 3 has a bottom 5 at an end face and is open towards the other end face 7. Between the end faces 5, 7, the jacket blank 3 has a substantially constant wall thickness which, however, decreases slightly from the bottom 5 towards the end face 7, preferably continuously. In FIG. 1, the wall thickness as well as a projectile core 9 arranged within the jacket blank 3 is indicated by dashed lines, the wall thickness course and the core part 9 incorporated in the jacket blank 3, which is made for example of lead or also of tin or zinc or alloys thereof, being illustrated. The core part 9, which rests on the bottom 5 and forms the projectile rear-sided core part in the deformation and/or partial fragmentation projectile 1 according to the invention described further below, is introduced into the jacket blank 3 by means of a thermal joining process and is fixed to an inner circumference 11 of the jacket blank 3 at least in sections. For example, the core part 9 may be attached to the jacket blank 3 as follows: a flux, i.e. an additive used in soldering for better wetting of the jacket blank 3 by the solder, is injected into the jacket and then the metal material, for example lead, to form the core part 9 is introduced into the metal blank 3. Then, the core part 9 is caused to melt, for example by means of an induction coil, whereby the core part material 9 adheres to the jacket blank 3 in a material-locking manner. This is assisted by the flux in that the flux etches the jacket blank 3 on the inner circumferential surface 11 prior to melting of the core part material 9. As a result, a distinct, strong intermetallic bond can be formed between the core part material 9 and the jacket blank 3. In FIGS. 1 and 2, it can also be seen that a cone preform 15 is formed at an end part 13 of the core part 9 facing away in the bottom 5 as a result of the method of attaching the core part 9 to the jacket blank 3 according to the invention. In particular, the cone preform 15 is formed by heating the molten core part material 9 such that that the latter starts to boil and thus expands, in particular boils up. When the core part material 9 is cooled to form the integral connections between the core part 9 and the jacket blank 3, the liquid core part material 9 slides back down and into the jacket interior only to a limited extent, since integral connections have already been formed between the jacket inner circumference 11 and the outer circumference of the projectile core end section 13. In particular, the volume of the liquefied and solidifying core part material 9 shrinks so that the core part material 9 increasingly pulls towards the jacket circumference 11 to form the cone preform 15. In this regard, it can be seen that the surface of the cone preform 15 is irregular, in particular corrugated and/or textured, that is, has irregular protrusions 17 and recesses 19.
[0041] Referring again to FIGS. 3 and 4, the metal blank 3 is shown according to FIGS. 1 to 2. With reference to FIGS. 3 and 4, it can be seen that the metal blank 3 is in a downstream machining/manufacturing state with respect to FIGS. 1 to 2. Referring in particular to FIG. 4, it can be seen that the end part 13, in particular the cone preform 15 with the protrusions 17 and recesses 19, has been machined. For example, by means of a forming step, such as a cold forming step, the irregular cone preform 15 has been further machined into a regular cone recess 23 having a substantially flat surface 21. The substantially V-shaped or cone-shaped recess 23 has a smaller axial dimension compared to the cone preform 15 shown in FIG. 2, and an opening angle of the surface 21 forming the cone is larger than that shown in FIG. 2.
[0042] FIGS. 5 to 9 illustrate exemplary embodiments of the deformation and/or partial fragmentation projectiles 1 according to the invention. In the present description of the exemplary embodiments, reference will essentially be made to the differences existing between the embodiments in order to avoid repetition. In this regard, identical or similar components are provided with identical or similar reference numerals. Referring to FIG. 5, the projectile jacket 25 is formed from the jacket blank 3 and has a projectile rear jacket 27 adjoining the bottom 5 and a projectile front section 29 adjoining the projectile rear jacket 27 and formed as an ogive. Firstly, the manufacturing process will again be discussed: a further core part 31 is introduced into the jacket blank 3 with the projectile rear-side core part 9 preformed, and is brought into contact with the core part 9 over substantially its entire surface, which now forms the projectile core-sided core part. Thereby, the projectile front-side core part 31 is adapted to a shape of the projectile rear-sided core part 9. In particular, the projectile front-side core part 31 has a substantially V-shaped or cone-shaped tip 33 which is shape-matched with respect to the cone recess 23 so as to form, in particular, full-surface contact with the surface 21 of the cone recess 23. Subsequently, the projectile front jacket 29 is deformed under temperature treatment, i.e. compressed inwardly, in particular in the region of the front face 7, so that the projectile front jacket 29 increasingly tapers in the direction of the front face 7 to form the ogive. During the deformation of the projectile front jacket 29, a preferably cylindrical and sharpened mandrel (not shown) is inserted into the projectile front-sided core part 31 from the front side 7, so that according to the final shape of the projectile jacket 25 shown in FIG. 5, the projectile front-sided core part 31 has a substantially blind hole-like recess 35. In this respect, the blind hole-like recess 35 has an internal diameter corresponding to that of the opening 37 remaining on the front face 7. Furthermore, it may be provided that the opening 37 is delimited by a circumferential, bevelled and annular jacket end face 39, which serves in particular for supporting a further core part illustrated with reference to FIGS. 6 to 7, in particular a projectile core tip 41.
[0043] A preferably circumferential tear-off edge 43 is arranged, on the one hand, in the region of the cone recess 23 or of the cone tip 33 and, on the other hand, in the region of the transition between the projectile rear jacket 27 and the projectile front jacket 29. In particular, the tear-off edge 43 is located in an axial region in which the cone recess 23 extends. It has been found that in doing so, the functionality of the partial fragmentation and/or deformation projectiles 1, in particular the controlled deformation and/or fragmentation, of the projectiles 1 according to the invention is ensured. For example, a tapered deformation of the ogive-shaped projectile front part 29 starts from the break-off edge 43, with the projectile front-side core part 31 being substantially unsoldered into the jacket 25. For example, the projectile front-side core part 31 may be press-fitted into the jacket 25 and/or attached to the jacket 25 by positive and/or frictional connection techniques. According to FIG. 5, the tear-off edge 43 has an inwardly recessed shoulder 45 and an adjoining chamfer 47, which in turn merges into the ogive-shaped projectile front section 29.
[0044] In FIG. 7, the projectile core tip 41 can be seen at least partially, in particular the part protruding from the jacket 25. The projectile core tip 41 is flattened at its front surface 49. With reference to FIG. 6, it can be seen that the projectile core tip 41, made for example of the same material as the projectile rear-sided core part 9 and/or the projectile front-sided core part 31, has a circumferential support surface 51 oriented at an angle with respect to a longitudinal axis of the projectile 1, which is shape-matched with respect to the jacket end face 39, in particular in order to rest fully and/or evenly. In the recess 35, the projectile core tip 41 may be introduced or the projectile core tip 41 may be dimensioned with respect to a dimension of the recess 35 such that as to result in a cavity 53 which is not occupied by the projectile core tip 41.
[0045] With reference to FIGS. 8 and 9, two further exemplary embodiments of a deformation and/or partial fragmentation projectile 1 according to the invention are illustrated, FIG. 8 substantially corresponding to the embodiment according to FIG. 5 and FIG. 9 substantially corresponding to the embodiment according to FIG. 6. Therefore, only the differences with respect to the embodiments will be discussed below. In FIGS. 8 and 9, a groove 57, which is preferably circumferential and curved in cross-section, in particular part-circular or semicircular, is provided on an outer circumference 55, which groove may also be referred to as a retaining groove, and serves to retain the projectile-rear core part 9 with respect to the projectile jacket 25. As has already been explained, according to the invention, the additional retaining groove 57 and thus also the corresponding additional manufacturing step for introducing the retaining groove 57 into the projectile jacket 25 can be dispensed with without having to accept any losses in terms of the controlled and/or defined deformation and/or fragmentation of the deformation and/or partial fragmentation projectiles 1 according to the invention. However, the retaining groove 57 may also prove advantageous with respect to handling, for example during manufacture and/or transport of the deformation and/or partial fragmentation projectiles 1 according to the invention. Furthermore, the retaining groove 57 may also provide an additional fixation of the projectile rear core part 9 into the projectile jacket 25 and thus serve as a kind of securing device. The embodiment according to FIG. 9 can essentially be regarded as a combination of the embodiment according to FIGS. 6 and 8, namely with respect to the additionally introduced retaining groove 57 and the inserted projectile core tip 41.
[0046] The features disclosed in the foregoing description, figures and claims may be significant, both individually and in any combination, for the realization of the invention in the various embodiments.
LIST OF REFERENCE SIGNS
[0047] 1 deformation and/or partial fragmentation projectile [0048] 3 jacket blank [0049] 5 bottom [0050] 7 front side [0051] 9 core part [0052] 11 inner circumferential surface [0053] 13 end section [0054] 15 cone preform [0055] 17 protrusion [0056] 19 recess [0057] 21 cone surface [0058] 23 cone recess [0059] 25 jacket [0060] 27 projectile rear jacket [0061] 29 projectile front jacket [0062] 31 projectile front-sided core part [0063] 33 cone tip [0064] 35 recess [0065] 37 opening [0066] 39 jacket end face [0067] 41 projectile core tip [0068] 43 tear-off edge [0069] 45 shoulder [0070] 47 chamfer [0071] 49 front face [0072] 51 support surface [0073] 53 cavity [0074] 55 Outer circumference [0075] 57 groove
