DE2508180A1 - BULLET FOR PRACTICE AMMUNITION - Google Patents

Description

Troisdorf, February 24, 1975 OZ: 75 OH (2428) Dr. He / Sz

DYNAMIT NOBEL AKTIENGESELLSCHAFT

Troisdorf, district Cologne 2508180

Projectile for practice ammunition

The invention relates to the subject matter specified in the preamble of claim 1.

There are known projectiles for practice ammunition, the G-oschosskör- ■ per metal at the front end has a form-fitting connected to it, the outer shape of the fuse of the sharp projectile which is screwed with its rear end into the projectile body aa sharp g-seolicösetj ei dge,. ". The recess starting from the front end of the gascho body, which in the case of the sharper projectile is intended to accommodate the explosive Is, \ jl.vd bein iTbiingsgiiSOhoS with eirr ^ ra inert filler or i2ine: n iuörtan garbage body, s,> B _a du ^ Alusinium _? Fallen to ■ with dar; Ubun * sg: esoboB aas gloicbe Flu ^ verhalty ·] wi .3 with the same calibrifoti eahtizZim (resoiicß κι? Iir.re.ich-? N, v «| jöii both at least approximately the same weight un-i the ^ lei ^ he center of gravity ^^.

, iiaehteilig bsi these? u beköuntan storey for tH: u.nß? -i ^ unliio4s is, dVvS for ά.1ο H ^ rstDllusg sin YcrhaltniorxiSir: ^ roi ^ er teohnißcbor

609837/0073 _fiAn ^

■ BADORiGfNAL

Effort is required. So must the massive metallic fuse replacement piece at its rear end with a peer thread corresponding to that of the detonator to it to be able to screw into the projectile body of the sharp projectile. Also the filling of the front recess of the projectile body with an inert material requires an additional, undesirable expense.

The invention is based on the object of creating a projectile for j training ammunition which is as low as possible technical effort can be produced without adversely affecting the flight properties. .

According to the invention, this object is achieved by the measures specified in the characterizing part of claim 1:

As was surprisingly found, such a lightweight fuse replacement piece, designed as a hollow body or hood made of plastic, withstands the forces acting on the projectile during launch and during the plug without any problems. The projectile is subject to very strong forces when it is fired if it is accelerated so strongly within a few milliseconds that it emerges at the muzzle of the weapon at a speed of about 1000 m / s or more. 2tt the axial compressive forces caused by this occur with the twist & stabilizedü G-esehossnen _: c-sren number of revolutions at the "- ■ / affeas: charge beiopielcwr-.Lö-v ίΐ- the magnitude of 100 IJ / iüin, still ntr.rk? r & d: iel vriri-r & nie centrifugal forces ^: ■. 609837/0073 _BM)

and also add corresponding tangential forces. The hood-like detonator replacement piece may be replaced by these different, Forces not deformed or even "damaged" in an impermissible manner because then the required reproducible plug behavior can no longer be guaranteed until it hits the target is. In the case of spin-stabilized projectiles, the connection between the projectile body and the hood-like detonator replacement ■ piece must also be so torsion-proof that the projectile body! Very fast imposed when walking through the gun barrel Rotational movement is properly transmitted to the fuse replacement piece, so this is none or at most one very little slip against your projectile body on v / eist. Otherwise, i.e. if the igniter replacement piece is not in perfect working order rotates with it, it can then take place in the circumferential direction due to the Relative movement between projectile body and detonator replacement piece resulting in such a strong heating due to friction, that the plastic of the Zünuerersa - .; astückes in impermissible Wise melts or even -seilates away.

With regard to these force effects, the fuse replacement piece according to the invention is preferably pushed onto the base of the projectile body with press fits so that the fuse replacement piece is not elastically widened in any rear area * TM with the generally required very long shelf life of bsiopielsvoiae 10 years to avoid damage to the Ivunsts to ffaaiibe by tension, rl & rf the Presssits, but not too irLre.ir.jii be chosen. At HooMraekpolyäthy-

609837/0073

BATH ORIGINAL

Len as plastic for the igniter replacement piece is dangerous stress cracking does not occur, for example, if the action that occurs when the fuse replacement piece is pressed onto the attachment; permanent elongation is less than about 3 #. The Formsteifig- i The ability of the hood-like replacement part is all the greater, the greater its wall thickness. However, the greater the increase increasing wall thickness because of the then larger in rotation

offsetting mass of the igniter replacement piece, in turn, the connection |

requirements for the torsional strength of the connection Zünderer- ι

i cant projectile body. As was found, the invent | Correct igniter replacement part also takes account of these two opposing requirements. 'j

i TJm that of the projectile body on the fuse replacement in order:

Forces exerted in the catch direction, which are required for the transmission of a certain torque, are to be kept as small as possible, according to the invention, the outer diameter; as little as possible smaller "of the approach of the projectile ^body: as the projectile caliber, as little as possible smaller means that ■ is preferably not larger _(selected half the diameter difference between projectile caliber and j approach which determines the wall thickness of the hood-like Zünderersatz- i piece in the rear region as is necessary for the strength of the fuse replacement piece, so that the connecting surface between the G-esahoßktU'per -and ZüwderarsatEstück - in the radial direction
seen - to be placed as far outside as possible. The arrangement according to claim 2 has proven to be particularly advantageous sen .-. "■" _ -. _. ; ..'.'- ': _ ■■■ _ , ■ ' ./ - '"' ■ '■". . - ·

Any plastic can be used for the igniter replacement part that can withstand the forces acting in the specified temperature range. For example, impact-resistant ones are mentioned PVC, feather-pressure polyethylene or high-pressure polyethylene, optionally cross-linked, e.g. with carbon black and / or peroxides, polyester, e.g. Polytetramethylene terephthalate or the like. Preferred are those 'plastics which are produced by the injection molding process or by the Allow pressing process to be processed easily. !

The detonator replacement piece pushed onto the pin-shaped extension of the projectile body with a press fit can be used with this, for example be additionally glued using a suitable adhesive. Instead, however, it can also be provided be to connect both parts in the manner of a bayonet lock, whereby for spin-stabilized projectiles the arrangement is to be chosen so that the bayonet catch does not come loose when fired.

According to a further proposal of the invention, it is provided according to claim 3 that the connection between the two parts is additionally designed in the manner of a snap connection in addition to a press fit. A snap connection has the advantage over a bayonet lock that the production of both the fuse replacement piece and the projectile body is simpler. . A drying process, as is generally required when using adhesives, is omitted in the snap connection preferred according to the invention. Preferably the

-6- 25Q818Q

Snap connection with two or three arranged one behind the other; Neten annular beads or grooves formed.Um the pushing ; To facilitate the replacement of the detonator on the approach, it proves to be useful to remove the annular beads of the approach and
preferably also that of the igniter replacement piece on one side with a beveled annular surface in such a way that the annular beads slide on one another when the two parts are pushed axially one over the other, the igniter replacement | piece is accordingly slightly expanded radially. : In the latched state, the annular beads of the igniter are ^l replacement part with its other radially directed ring: area at the appropriate likewise radially directed
Counter ring surface of the annular beads of the projectile body. In this case, the plastic of the Zünderersatsstückes must accordingly; be elastic, so that after the radial spreading open when; Snapping the annular beads into the corresponding annular grooves can spring back radially inwards. In connection with claim 2, the largest outer diameter determined by the annular beads applies as the outer diameter of the attachment.

An additional increase in the strength of the connection
between the projectile body and the fuse replacement piece ί can, if necessary, still be achieved according to claim 4. '
Pie roughening, v / elche the friction between the two parts
increased ₅ can already be achieved, for example, by phosphating the mstallißoliei] projectile body. Instead of
but also the Anaats of the projectile body with a _;

60 98 377 0Q73

knurled surface can be formed. This knurling may be formed, for example, saw-tooth and is ized in drallstabi- '· projectiles preferably inclined counter to the direction of rotation. With such a strong roughening of the lateral surface of the attachment, the hood-like detonator replacement piece is expediently pressed radially onto the attachment after it has been pushed onto the attachment = by means of a calibration press tool and, with corresponding plastic deformation, into the j

Pressed in the indentations of the knurling of the approach. ;

According to claim 5, the projectile according to the invention is with a \

Additional axial projection provided. This projection is preferably cylindrical, but can also be conical or conical or also have another suitable shape. It makes it possible in an advantageous manner, together with the fuse replacement piece according to the invention, to set the required values for the center of gravity and the weight of the training bullet. If the projectile body is also provided with a recess extending from its rear end, in which a flare, smoke generator or the like is housed, the center of gravity and weight can also be influenced by reducing or enlarging them ... _: ·.;. "'■; - .. ■ '. ~ ^: " ■ -.- ^; ·

The projectile body of the projectile according to the invention is one, finally the sowing aes and. of the possibly provided axial. Protrusion designed as a one-story solid metal body.

• 60 9837/0 07 3

Steel is preferably used as the metal. It proves

it is advantageous that for the projectile body of the invention [

appropriate bullet a material of lower strength

as can be used for the sharp projectile that is; can be machined more easily. This on simple

Projectile bodies that can be produced in a manner may require an after-treatment!

treatment, for example phosphating, subjected, and if j

required, then with '<known for such purposes

Coated with varnishes. !

The invention is shown in the drawing in one embodiment; game shown in longitudinal section and is based on this next-; bend explained in more detail. The projectile body 1 is with the! designed as a hollow body fuse replacement piece 2 made of high-pressure polyethylene, in that its rear region 3 engages over the zapfenföraiigen extension 4 arranged at the front end of the projectile body 1 with a press fit. In addition, a form-locking snap connection is provided that ■ the Zilnder replacement piece 2 with its three annular beads 5 in cor- _; Responding annular grooves 6 of the approach 4 engages. With the ! At the rear end face, the fuse replacement piece 2 is supported on the shoulder 7 of the projectile body 1. The extension 4 has at the front end the axial cylindrical projection 8, which protrudes into the cavity 9 of the fuse replacement piece 2 and corresponds to the center of gravity and weight setting of the training bullet-d the same-caliber. sharp bullet. The ZUndarersatastttcTc 2 can possibly increase its

60 9 83 7700 7 3

Dimensional stiffness with e.g. four evenly distributed along the circumference inner longitudinally extending reinforcing ribs, not shown, are provided.

The projectile body 1 also has from its rear
End of outgoing blind hole 10, in which the flare; 11 and its firing 12 are arranged, and the back; th pierceable means of the ignition jet from the cover 13 j from for example paper, which between the two ^ring: washers 14 and the beaded edge 15 is held ver ~ 'is closed. Depending on the center of gravity to be set
and the G-ev / icht can this blind hole 10 in coordination with
the other components of the training floor in depth and! if necessary, the diameter can also be varied. In the rear area
of the projectile body 1 is the guide band 16 from vorzugsv / eise
Sintered iron arranged.

Claims (6)

Claims 1.J projectile for practice ammunition, especially with twist stabilization, whose projectile body made of metal at the front end is positively connected to it and in its outer shape The fuse replacement part corresponding to the fuse of the sharp projectile has, characterized in that the igniter replacement piece (2) is a hollow body made of plastic, which with its rear area (3) a pin-shaped extension (4) of the projectile body (1) overlaps on the outside, along the lateral surface of the extension (4) the projectile body (1) is firmly connected and preferably with its rear face on a circumferential; fenden shoulder (7) of the projectile body (1) is supported, the outer diameter of the projection (4) as little as possible is smaller than the bullet caliber. . . j 2. Projectile according to claim 1, as marked by i shows that the outer diameter of the attachment (4) greater than about 0.7 times, preferably 0.8 times, the Bullet caliber is; :. ; ;, '■■. "_..- S 3. Projectile according to claim 1 or 2, dadurchgekenn-; shows that the fuse replacement piece (2) with the projectile body (1) by means of at least one in a corres-: pondende Bingnut (6) engaging annular bead (5) after Kind of a snap connection is connected. ',, - "■ ■ ·: 4. Projectile according to one of claims 1 to 3, characterized in that the projection (4) of the projectile body (1) has a roughened outer surface. 5. Projectile according to one of claims 1 to 4, characterized in that the projection (4) of the projectile body (1) an axial one protruding into the hollow body of the igniter replacement piece (2) with radial play Projection (8) up / down. 6 09837/007 3 Blank page