US3837057A - Method for securing a projectile in a sabot - Google Patents

Method for securing a projectile in a sabot Download PDF

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Publication number
US3837057A
US3837057A US00231867A US23186772A US3837057A US 3837057 A US3837057 A US 3837057A US 00231867 A US00231867 A US 00231867A US 23186772 A US23186772 A US 23186772A US 3837057 A US3837057 A US 3837057A
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US
United States
Prior art keywords
sabot
rear part
projectile body
projectile
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00231867A
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English (en)
Inventor
W Engel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rheinmetall Air Defence AG
Original Assignee
Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Application granted granted Critical
Publication of US3837057A publication Critical patent/US3837057A/en
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Expired - Lifetime legal-status Critical Current

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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
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/064—Sabots enclosing the rear end of a kinetic energy projectile, i.e. having a closed disk shaped obturator base and petals extending forward from said base

Definitions

  • a sabot projectile comprising a projectile body having at least one peripheral groove and a sabot incorporating a sabot rear part having a substantially sleeveshaped extension arranged at its front end.
  • the extension is sub-divided into segments by means of substantially axially extending slots, and such segments possess radially inwardly directed projections or tabs which are pressed into such peripheral groove.
  • the present invention relates to a new and improved construction of sabot projectile embodying a projectile body having at least one peripheral groove and with a sabot rear part containing a sleeve-shaped extension arranged at its front end and which is sub-divided by axially extending slots into segments.
  • a further aspect of this development also pertains to a new and improved method of securing a projectile body in a sabot.
  • a ring consisting of a number of segments is arranged in a peripheral groove, this ring bearing upon a rear flank of the groove.
  • the ring protrudes outwardly past the diameter of the projectile body and forms the bearing support for a forwardly projecting sleeve formed from a number of segments.
  • a sleeve-shaped projection or extension of the rear part surrounds the aforementioned sleeve.
  • the extension is provided with axially-extending slots and is inwardly flanged at its front end, thereby preventing forward displacement of the sleeve.
  • the rear part preferably consists of an aluminum alloy, for instance Perunal, which characterizes itself on the one hand by lower weight and on the other hand by high mechanical strength, something which is important because of the larger inertia forces acting during firing.
  • a further object ofthe present invention relates to an improved sabot projectile having novel means for connecting the projectile body with the sabot.
  • Still a further significant object of the present invention relates to sabot projectiles which are less complicated in design and more economical to manufacture.
  • a further significant object of the present invention relates to a novel method of securing a projectile body to a sabot in a reliable and economical fashion with a minimum of components for providing the connection.
  • the inventive sabot projectile is manifested by the features that the segments of the sleeve-shaped extension of the sabot rear part embody radially inwardly directed tabs or dogs which engage in the aforementioned peripheral groove.
  • FIG. 1 is a longitudinal sectional a sabot projectile designed according to the teachings of the present invention, and taken substantially along the line II of FIG. 2;
  • FIG. 2 is a cross-sectional view of the sabot projectile of FIG. 1, taken substantially along the line IIII thereof;
  • FIG. 3 illustrates in cross-section view the projectile body located at the rear portion of the sabot but prior to its attachment therewith;
  • FIG. 4 is a cross-sectional view, similar to the showing of FIG. 3 but illustrating the projectile body after its attachment with the rear portion of the sabot;
  • FIG. 5 is a front view of the punch used for securing the projectile body at the sabot rear part, and seen looking in the direction of the arrow A of FIG. 1.
  • the projectile or core body 1 illustrated in FIG. 1 is preferably formed from a heavy metal, has an essentially cylindrical configuration and possesses an ogive 2.
  • the rear portion of the projectile body 1 bears by means of a forwardly widening conical surface 3 upon a similarly constructed bore surface 4 of a sabot rear part 5.
  • the projectile body 1 is provided at its rear portion with two peripheral or circumferential grooves 7.
  • the flanks of the peripheral grooves 7 constitute parts of conical surfaces.
  • the rear conical surface 8 opens towards the rear and the front conical surface 9 towards the front.
  • the aperture angle or angle of opening of the rear conical surface 8 is greater than that of the front surface 9 and only slightly less than
  • the sabot rear part 5 possesses a sleeve-shaped extension or projection 6 into which protrudes the rear part of the projectile or core body 1.
  • This sabot rear part 5 is preferably formed from an aluminum alloy, for instance Perunal.
  • Sabot rear part 5 possesses a ringshaped groove 11 machined at the region of a central bore 10 and an externally cut peripheral groove 12. The flanks of groove 12 are located at intersecting cone surfaces.
  • a rear groove flank 13 is intersected by a further rearwardly extending and forwardly opening conical surface 14, the diameter of the line of intersection of both surfaces 13 and 14 being less than the outside diameter of the rear end 15 of the sabot rear part 5. Furthermore, the conical surface 14 intersects a forwardly opening conical surface 16 which intersects the jacket surface of the sabot rear part end 15, as shown.
  • extension 6 is subdivided into six segments 32.
  • Plane 18 is disposed rearwardly of the peripheral grooves 7 of the projectile body 1 and contains the cutting line or point of intersection of the flanks of the groove 12 and the plane of symmetry of the groove 11.
  • the segments 32 of the sabot rear part 5 are provided at the outside with conical blind bores or boreholes 19 having flat or planar base surfaces 190.
  • the projectile body 1 is secured to the sabot rear part 5 by carrying out by the following working operations of the method: initially the projectile body 1 is inserted into the sabot rear part 5 in the manner depicted on FIG. 3.
  • each segment 32 of the sabot rear part 5 possesses at the outside or outer surface a conical blindhole bore 19 with flat bottom or base surface 19a, thus providing a thin-walled zone 20 at such segment 32.
  • each flat bottom or base surface 19a which is disposed perpendicular to the radially directed axis of the blindhole bore 19, there are punched-in two recesses ordepressions 21 by means of the respective associated punch 35 or other suitable tool equipped with two projections 34, as best seen by referring to FIGS. 3 and 5.
  • These projections 34 of the punch 35 have a quadratic or square crosssection.
  • the cylindrical part la of the projectile or core body 1 which is not inserted into the extension 6 of the sabot rear part 5 is enclosed by a jacket 23 which extends up to a point forward of the rear end of the ogive 2.
  • Jacket 23 is preferably formed, as by injection molding, from a thermoplastic material designated as nylon 6.6, and is a material known'in the art.
  • the front portion 23a of the jacket 23 is cylindrical, whereas the rear portion 23b has the form of a truncated cone which tapers slightly from the rear towards the front.
  • the diameter of the front edge of the truncated cone portion 23b is greater than the diameter of the cylindrical jacket portion 23a so that the rear part of the jacket 23 forms a collar-shaped widened portion 24 of such jacket.
  • This widened portion 24 forms the guide or driving band, which upon passing through the gun or weapon bore, transmits spin or rotational movement to the jacket 23.
  • the rearmost portion of the jacket 23 contacting the surfaces 14 and 16 of the sabot rear part 5 forms a ring 25 of substantially tongue-shaped cross-section.
  • the jacket 23 also engageswith the blind boreholes l9 and the recesses 21 of the sabot rear part 5.
  • radially directed grooves 26 are cut from the outside up to the location of webs 31 at the jacket 23.
  • the grooves 26 extend rearwardly up to the height of the groove 12 of-the sabot rear part5.
  • the plane of symmetry of the grooves 26 coincide with those of the slots 17 of the sabot rear part 5.
  • a hood member 27 formed of plastic and extending forwardly of the jacket 23 is constructed in the form of a hollow body which is tapered or conically formed at its front. part and widens rearwardly to the diameter of the jacket 23.
  • Hood member 27 terminates forwardly of the ogive or tip 2 of the projectile body I, encloses the ogive and is spaced therefrom, and is connected with the jacket 23 in such a way that an inwardly projecting flange 28 which bounds such hood member towards the rear engages with a groove 29 cut throughout the entire periphery of the jacket 23.
  • the hood member 27 is sealed at its front end by a thin cover member 30 extending transversely with respect to the lengthwise axis of the hood member 27 and formed integral with the remaining part of the hood member 27.
  • the circular-shaped junction location 30a of this cover member 30 forms an intended rupture location.
  • the lands of the gun bore not illustrated in the drawing cut into the driving or guide band 24 so that the jacket 23 is placed into rotation or spin.
  • the rear part of the driving band 24 disposed at the height of the conical surface 14 of the sabot rear part 5 is subjected to deformation in radial direction. Under the action of the force brought about by this deformation and exerted by the conical surface 14 upon the jacket 23 there is produced a frictional force by means of which there is transmitted the spin of the jacket 23 to the sabot rear part 5.
  • the projectilebody 1 is pressed against the support formed by the support surface 4 of the sabot rear part 5 and owing to the thus engaging frictional force is likewise placed into spin.
  • a method for attaching a projectile body as a substantially sleeve-shaped extension of a sabot rear part comprising the steps of:
  • said projectile body includes a plurality of spaced peripheral grooves, and said blindhole bores with flat bottom surfaces are formed in the sabot rear part in sufficient numbers to provide, after deformation, securing tabs which extend into each of said projectile peripheral grooves.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Baking, Grill, Roasting (AREA)
US00231867A 1971-03-29 1972-03-06 Method for securing a projectile in a sabot Expired - Lifetime US3837057A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH455771A CH536481A (de) 1971-03-29 1971-03-29 Treibspiegelgeschoss und Verfahren zu dessen Herstellung

Publications (1)

Publication Number Publication Date
US3837057A true US3837057A (en) 1974-09-24

Family

ID=4278295

Family Applications (1)

Application Number Title Priority Date Filing Date
US00231867A Expired - Lifetime US3837057A (en) 1971-03-29 1972-03-06 Method for securing a projectile in a sabot

Country Status (15)

Country Link
US (1) US3837057A (it)
JP (1) JPS5140396B1 (it)
AT (1) AT313754B (it)
BE (1) BE780812A (it)
CA (1) CA957560A (it)
CH (1) CH536481A (it)
FI (1) FI55258C (it)
FR (1) FR2131393A5 (it)
GB (1) GB1362308A (it)
IL (1) IL38988A (it)
IT (1) IT950812B (it)
NL (1) NL148158B (it)
NO (1) NO132504C (it)
SE (1) SE392165B (it)
ZA (1) ZA721921B (it)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2357859A1 (fr) * 1976-07-09 1978-02-03 Dynamit Nobel Ag Projectile a sabot
US4351094A (en) * 1978-08-08 1982-09-28 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Method of manufacturing a sabot projectile and sabot projectile produced thereby
US4419796A (en) * 1981-09-24 1983-12-13 Honeywell Inc. Method of making spin stabilized discarding sabot projectile
US4982669A (en) * 1988-02-04 1991-01-08 Rheinmetall Gmbh Subcaliber discarding sabot projectile
FR2757624A1 (fr) * 1996-12-06 1998-06-26 Rheinmetall Ind Ag Projectile sous-calibre

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH627550A5 (de) * 1978-05-30 1982-01-15 Oerlikon Buehrle Ag Drallstabilisiertes treibspiegelgeschoss zur ueberwindung eines heterogenen widerstandes.
SE444984B (sv) * 1982-05-28 1986-05-20 Bofors Ab Drivorgan for underkalibrig rotationsstabiliserad projektil
EP0104587A1 (en) * 1982-09-23 1984-04-04 Honeywell Inc. Subcaliber munition
GB8708674D0 (en) * 1986-05-21 1996-10-23 Rheinmetall Gmbh Shell
NO163425C (no) * 1987-04-30 1990-05-23 Oerlikon Buehrle Ag Utformning av et oenskebruddsted ved hekkdelen av et drivspeil for et drivspeilprosjektil.
US5272982A (en) * 1989-06-01 1993-12-28 Giat Industries Device for maintaining a projectile relative to the casing of a telescoping ammunition
FR2647890A1 (fr) * 1989-06-01 1990-12-07 France Etat Armement Dispositif de maintien d'un projectile relativement a l'enveloppe d'une munition telescopee
FR2653873B1 (fr) * 1989-10-26 1992-01-03 France Etat Armement Projectile sous-calibre comportant un noyau, un sabot et une chemise.
CH684803A5 (de) * 1993-03-05 1994-12-30 Contraves Ag Treibkäfig für ein unterkalibriges, flügelstabilisiertes und mit Drall verschossenes Wuchtgeschoss.
FR2915563B1 (fr) * 2007-04-30 2010-10-15 Nexter Munitions Projectile generateur d'eclats
DE102009049440A1 (de) 2009-10-14 2011-07-07 Nitrochemie Aschau GmbH, 84544 Treibspiegel
DE102019125841A1 (de) 2019-09-25 2021-03-25 Rheinmetall Waffe Munition Gmbh Verfahren zur Herstellung eines Treibspiegelgeschosses

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US930863A (en) * 1907-12-09 1909-08-10 Thomas Albert Kearney Process for banding projectiles.
US2349677A (en) * 1939-10-31 1944-05-23 Ira J Mccullough Method of making projectiles
US2792618A (en) * 1953-11-23 1957-05-21 Woodrow A Walker Method of construction of dual jacket partition bullets
US3349459A (en) * 1964-10-19 1967-10-31 Fed Cartridge Corp Method of making plastic tubes
US3349711A (en) * 1964-12-07 1967-10-31 Remington Arms Co Inc Process of forming jacketed projectiles
US3453831A (en) * 1968-01-25 1969-07-08 Fredric Rusche Method of forming and driving thin wall pipe pile and boot
US3551972A (en) * 1967-07-24 1971-01-05 Oerlikon Buehrle Holding Ag Method of manufactring a sabot

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US930863A (en) * 1907-12-09 1909-08-10 Thomas Albert Kearney Process for banding projectiles.
US2349677A (en) * 1939-10-31 1944-05-23 Ira J Mccullough Method of making projectiles
US2792618A (en) * 1953-11-23 1957-05-21 Woodrow A Walker Method of construction of dual jacket partition bullets
US3349459A (en) * 1964-10-19 1967-10-31 Fed Cartridge Corp Method of making plastic tubes
US3349711A (en) * 1964-12-07 1967-10-31 Remington Arms Co Inc Process of forming jacketed projectiles
US3551972A (en) * 1967-07-24 1971-01-05 Oerlikon Buehrle Holding Ag Method of manufactring a sabot
US3453831A (en) * 1968-01-25 1969-07-08 Fredric Rusche Method of forming and driving thin wall pipe pile and boot

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2357859A1 (fr) * 1976-07-09 1978-02-03 Dynamit Nobel Ag Projectile a sabot
US4351094A (en) * 1978-08-08 1982-09-28 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Method of manufacturing a sabot projectile and sabot projectile produced thereby
US4419796A (en) * 1981-09-24 1983-12-13 Honeywell Inc. Method of making spin stabilized discarding sabot projectile
US4982669A (en) * 1988-02-04 1991-01-08 Rheinmetall Gmbh Subcaliber discarding sabot projectile
FR2757624A1 (fr) * 1996-12-06 1998-06-26 Rheinmetall Ind Ag Projectile sous-calibre

Also Published As

Publication number Publication date
FR2131393A5 (it) 1972-11-10
SE392165B (sv) 1977-03-14
NO132504B (it) 1975-08-11
NO132504C (it) 1975-11-19
DE2212853B2 (de) 1976-06-16
NL7204039A (it) 1972-10-03
JPS5140396B1 (it) 1976-11-02
IL38988A (en) 1975-04-25
FI55258B (fi) 1979-02-28
IT950812B (it) 1973-06-20
AT313754B (de) 1974-03-11
DE2212853A1 (de) 1972-10-12
BE780812A (fr) 1972-07-17
NL148158B (nl) 1975-12-15
IL38988A0 (en) 1972-10-29
FI55258C (fi) 1979-06-11
ZA721921B (en) 1972-12-27
CH536481A (de) 1973-06-15
CA957560A (en) 1974-11-12
GB1362308A (en) 1974-08-07

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