NO309116B1 - Procedure for equipping inertial ammunition with plastic drive belt, as well as sliding sliding drive belt - Google Patents
Procedure for equipping inertial ammunition with plastic drive belt, as well as sliding sliding drive belt Download PDFInfo
- Publication number
- NO309116B1 NO309116B1 NO971802A NO971802A NO309116B1 NO 309116 B1 NO309116 B1 NO 309116B1 NO 971802 A NO971802 A NO 971802A NO 971802 A NO971802 A NO 971802A NO 309116 B1 NO309116 B1 NO 309116B1
- Authority
- NO
- Norway
- Prior art keywords
- drive
- drive belt
- recess
- cut
- cage
- Prior art date
Links
- 239000003380 propellant Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
- F42B14/02—Driving bands; Rotating bands
Description
Denne oppfinnelse gjelder en ny måte å utruste inertammunisjon (også kalt KE-ammunisjon [gjennomslagskraft som følge av stor kinetisk energi]), så som pil-prosjektiler med underkaliber og omsluttende drivbur, med drivbånd av plast, gjerne av en allerede kjent type, idet slike plastdrivbånd ved utskytingen fra våpenløp med spesifisert konstruksjon vil tette mot løpets innerflate og kunne forskyves ved glidning i et særskilt tilpasset omløpende spor i det omsluttende drivbur, idet dette spor gjerne kalles en drivbåndutsparing. This invention relates to a new way of equipping inert ammunition (also called KE ammunition [impact due to high kinetic energy]), such as arrow projectiles with sub-caliber and enclosing propellant cage, with propellant bands of plastic, preferably of an already known type, as such plastic drive bands when launched from a gun barrel with a specified construction will seal against the inner surface of the barrel and can be displaced by sliding in a specially adapted circumferential groove in the enclosing drive cage, as this groove is often called a drive band recess.
Oppfinnelsen omfatter også dette drivbånd av plast, utformet for å passe til ammunisjonens prosjektil. The invention also includes this plastic drive band, designed to fit the ammunition's projectile.
Det å bruke plastdrivbånd som tetningselement mot våpenløpet, for bruk med forskjellig type ammunisjon daterer seg lang tilbake, selv om det primært var fullkaliberprosjektiler med plastdrivbånd som i utgangspunktet skulle konstrueres. En variant av et slikt plastdrivbånd for fullkaliberprosjektiler er bl.a. beskrevet i patent SE 7506856-9. Også i US 4 413 567 og US 4 907 513 er beskrevet slike drivbånd som i tillegg har kutt for å kunne ekspanderes, bl.a. kutt med skrå retning. The use of plastic drive bands as a sealing element against the barrel, for use with different types of ammunition, dates back a long time, even though it was primarily full-caliber projectiles with plastic drive bands that were initially to be constructed. A variant of such a plastic drive band for full-caliber projectiles is, among other things, described in patent SE 7506856-9. Also in US 4 413 567 and US 4 907 513 such drive belts are described which additionally have cuts to be able to expand, i.a. cut with an oblique direction.
For tiden brukes glideforskyvbare drivbånd av plast i forbindelse med inertammunisjon, som en drivgasstetning mellom drivburet og innsiden av våpenløpet. Hittil har man fått drivbåndet på plass i den spesielt utformede utsparing ved å utnytte elastisiteten under påsmettingen over drivburets bakre styrering, dvs. den styrering som baktil avgrenser drivbåndutsparingen. De kunne da imidlertid få permanent deformasjon, siden båndets plastmateriale ofte var mer plastisk enn elastisk, og slik permanent deformasjon kunne ofte føre til for stor klaring, hvilket gir dårlig tetning og redusert ytelse. Kravet er fremfor alt at drivbånd for denne type ammunisjon bør kunne dreie seg fritt i utsparingen i drivburet, men med minst mulig klaring. For å hindre for stor permanent deformasjon har man forsøkt å utforme den bakre styrering på drivburet med noe mindre ytterdiameter enn det man ellers naturlig ville ha valgt ut fra den kollektive kjennskap ved dimensjoneringen av slike prosjektilelementer, hvilken kjennskap er oppsamlet over en årrekke på basis av erfaring og beregninger. Det er imidlertid demonstrert at enhver slik reduksjon i styreringens ytterdiameteren fører til større og gradvis økende drivgasslekkasje og som til slutt påvirker drivbåndet slik at dette kan få vanskeligheter med å håndtere det tilsvarende økende drivgasstrykk, hvorved båndet kan bryte sammen. Currently, sliding plastic propellant bands are used in connection with inert ammunition, as a propellant gas seal between the propellant cage and the inside of the weapon barrel. Up until now, the drive belt has been placed in place in the specially designed recess by utilizing the elasticity during the application over the rear guide ring of the drive cage, i.e. the guide ring which delimits the drive belt recess at the rear. However, they could then suffer permanent deformation, since the band's plastic material was often more plastic than elastic, and such permanent deformation could often lead to excessive clearance, which results in poor sealing and reduced performance. Above all, the requirement is that the drive belt for this type of ammunition should be able to rotate freely in the recess in the drive cage, but with the least possible clearance. In order to prevent excessive permanent deformation, an attempt has been made to design the rear guide ring on the drive cage with a slightly smaller outer diameter than what would otherwise naturally have been selected based on the collective knowledge of the dimensioning of such projectile elements, which knowledge has been gathered over a number of years on the basis of experience and calculations. However, it has been demonstrated that any such reduction in the outer diameter of the guide ring leads to greater and gradually increasing propellant gas leakage and which ultimately affects the drive belt so that it may have difficulties in handling the correspondingly increasing propellant gas pressure, whereby the belt may break down.
Ifølge oppfinnelsen er det i stedet foreslått en mekanisk meget enkel, men i ammunisj onssammenheng særdeles radikal endring, nemlig at drivbåndet av plast har minst ett kutt så det kan åpnes og ekspanderes for innpasning i utsparingen ved at det i ekspandert tilstand føres over drivburets styrering bak utsparingen for så å smettes inn i denne, idet det der gjeninntar sin opprinnelige form som følge av dets materialelastisitet (på samme måte som en stempelring i en forbrenningsmotor). Styreringen kan dermed According to the invention, a mechanically very simple, but extremely radical change in the ammunition context is instead proposed, namely that the plastic drive belt has at least one cut so that it can be opened and expanded to fit into the recess by passing it in an expanded state over the drive cage's guide ring behind the recess and then slip into it, as it regains its original shape as a result of its material elasticity (in the same way as a piston ring in an internal combustion engine). The management can thus
dimensjoneres fullt uten forbehold. can be fully dimensioned without reservation.
Det kan også tenkes at man etter monteringen limer eller sveiser drivbåndet sammen langs kuttet, men dette har ganske overraskende vist seg å være unødvendig. Til tross for det faktum at drivbåndet er delt med et kutt har det vist seg at det ikke er noen som helst risiko for at det vil bryte sammen, selv ikke under avfyringen av våpenet og utskytingen av prosjektilet. It is also possible to glue or weld the drive belt together along the cut after installation, but this has surprisingly turned out to be unnecessary. Despite the fact that the drive band is split by a cut, it has been found that there is no risk whatsoever of it breaking apart, even during the firing of the weapon and the ejection of the projectile.
Det oppdelende kutt kan være utformet forskjellig, men helst legges det skrått, selv om man for såvidt kan tenke seg rent aksiale kuttflater. The dividing cut can be designed in different ways, but preferably it is laid obliquely, although one can imagine purely axial cut surfaces to that extent.
Oppfinnelsen er nærmere angitt i de patentkrav som er satt opp til slutt, men skal først beskrives i noe større detalj, idet det vises til de tilhørende tegninger, hvor fig. 1 viser et oppriss av et pilprosjektil forberedt for påsmetting av et drivbånd ifølge oppfinnelsen, idet dette drivbånd er vist til høyre for prosjektilet, fig. 2 viser i perspektiv et typisk drivbånd med kutt ifølge oppfinnelsen, og fig. 3 viser den ferdige inertammunisjon med prosjektil, drivbur og -bånd. The invention is specified in more detail in the patent claims which are set up at the end, but shall first be described in somewhat greater detail, referring to the associated drawings, where fig. 1 shows an elevation of an arrow projectile prepared for the application of a drive band according to the invention, this drive band being shown to the right of the projectile, fig. 2 shows in perspective a typical drive belt with a cut according to the invention, and fig. 3 shows the finished inert ammunition with projectile, propellant cage and belt.
Ammunisjonen 1 vist på tegningene har altså et prosjektil 2 av piltypen, med en spiss 3 foran og et haleparti 4 bak. Prosjektilet er på sin side omsluttet av et drivbur 5 som langsetter har en oppdelingssliss 6. De enkelte deler av drivburet, fortrinnsvis ikke mer enn tre i antallet, er holdt sammen av et frontbånd 7.1 den bakre del av drivburet er det anordnet en drivbåndutsparing 8 som foran avgrenses av en fremre styrering 9 og bakerst av en bakre styrering 10. The ammunition 1 shown in the drawings thus has a projectile 2 of the arrow type, with a tip 3 at the front and a tail part 4 at the back. The projectile, in turn, is enclosed by a drive cage 5, which has a dividing slot 6. The individual parts of the drive cage, preferably no more than three in number, are held together by a front band 7. 1 the rear part of the drive cage is provided with a drive band recess 8 which at the front is delimited by a front guide ring 9 and at the back by a rear guide ring 10.
I utsparingen 8 blir det derved, mellom styreringene 9, 10 plass til et drivbånd 11 av den type som er vist på fig. 2. Drivbåndet 11 er forberedt for innpassing ved at det er gjennomskåret med minst ett kutt 13, fortrinnsvis skrådd i forhold til bredden og som derved åpner båndet 11 slik det er indikert til høyre på fig. 1, slik at det kan ekspanderes og føres over den bakre styrering 10 og smette på plass i utsparingen 8 foran denne. Kuttets 2 kuttflater 13a og 13b blir derved ført tilbake mot hverandre som følge av drivbåndmaterialets elastisitet, og båndets kanter styres samtidig i utsparingen 8. Når drivbåndet 11 er på plass kontrolleres om det fritt kan dreies i utsparingen, hvoretter ammunisjonen er komplett og klar for levering eller bruk. In the recess 8, there is thereby, between the guide rings 9, 10, space for a drive belt 11 of the type shown in fig. 2. The drive belt 11 is prepared for fitting in that it is cut through with at least one cut 13, preferably inclined in relation to the width and which thereby opens the belt 11 as indicated on the right in fig. 1, so that it can be expanded and passed over the rear guide ring 10 and slipped into place in the recess 8 in front of this. The cut's 2 cutting surfaces 13a and 13b are thereby brought back towards each other as a result of the elasticity of the drive belt material, and the edges of the belt are simultaneously guided in the recess 8. When the drive belt 11 is in place, it is checked whether it can be turned freely in the recess, after which the ammunition is complete and ready for delivery or use.
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9403570A SE517164C2 (en) | 1994-10-19 | 1994-10-19 | Ways to provide K-E projectiles with sliding plastic belts and girdles for use in the manner |
PCT/SE1995/001179 WO1996012927A1 (en) | 1994-10-19 | 1995-10-13 | Skidding driving band |
Publications (3)
Publication Number | Publication Date |
---|---|
NO971802D0 NO971802D0 (en) | 1997-04-18 |
NO971802L NO971802L (en) | 1997-04-18 |
NO309116B1 true NO309116B1 (en) | 2000-12-11 |
Family
ID=20395665
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO971802A NO309116B1 (en) | 1994-10-19 | 1997-04-18 | Procedure for equipping inertial ammunition with plastic drive belt, as well as sliding sliding drive belt |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0784780A1 (en) |
IL (1) | IL115569A0 (en) |
NO (1) | NO309116B1 (en) |
SE (1) | SE517164C2 (en) |
WO (1) | WO1996012927A1 (en) |
ZA (1) | ZA958852B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10034345B4 (en) * | 2000-07-14 | 2005-02-17 | Rheinmetall W & M Gmbh | Can be fired from a gun full caliber bullet |
DE102005019534A1 (en) * | 2005-04-27 | 2006-11-09 | Rheinmetall Waffe Munition Gmbh | Process for converting from weapons with drawn pipes into ammunition made from smooth-bore weapons |
DE102012006892B3 (en) | 2012-04-05 | 2013-01-24 | Rheinmetall Waffe Munition Gmbh | Tail unit-stabilized full caliber-training projectile, has recesses formed between guiding elements for axial passage of propellant gases produced during firing of projectile, and sealing system arranged in solid head part |
DE102012006894B4 (en) | 2012-04-05 | 2014-02-27 | Rheinmetall Waffe Munition Gmbh | Tail stabilized full caliber practice bullet and method for its production |
DE102012006895B3 (en) * | 2012-04-05 | 2013-01-24 | Rheinmetall Waffe Munition Gmbh | Control surface-stabilized full caliber-practice projectile has solid head portion and annular control surface body that is adjoined to rear side of head part, where practice projectile is circumferentially provided with sealing system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1195184A (en) * | 1969-03-04 | 1970-06-17 | Forsvarets Fabriksverk | Improvements in or relating to Muzzle-Loading Rifle-Bore Mortas and Projectile Therefor. |
DE2331158A1 (en) * | 1973-06-19 | 1975-01-16 | Diehl Fa | Projectile guide ring - for frictionally imparting limited spin to a rotationally sensitive shell |
NO147159L (en) * | 1979-09-08 | 1900-01-01 | ||
AT388047B (en) * | 1987-09-28 | 1989-04-25 | Assmann Geb | Sealing ring for a grenade |
-
1994
- 1994-10-19 SE SE9403570A patent/SE517164C2/en unknown
-
1995
- 1995-10-11 IL IL11556995A patent/IL115569A0/en unknown
- 1995-10-13 EP EP95936143A patent/EP0784780A1/en not_active Ceased
- 1995-10-13 WO PCT/SE1995/001179 patent/WO1996012927A1/en not_active Application Discontinuation
- 1995-10-19 ZA ZA958852A patent/ZA958852B/en unknown
-
1997
- 1997-04-18 NO NO971802A patent/NO309116B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE9403570L (en) | 1996-04-20 |
EP0784780A1 (en) | 1997-07-23 |
NO971802D0 (en) | 1997-04-18 |
NO971802L (en) | 1997-04-18 |
IL115569A0 (en) | 1996-01-19 |
SE517164C2 (en) | 2002-04-23 |
ZA958852B (en) | 1996-05-14 |
WO1996012927A1 (en) | 1996-05-02 |
SE9403570D0 (en) | 1994-10-19 |
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MM1K | Lapsed by not paying the annual fees |