EP0404844A1 - Geschossboden für trägergeschosse. - Google Patents
Geschossboden für trägergeschosse.Info
- Publication number
- EP0404844A1 EP0404844A1 EP19890906070 EP89906070A EP0404844A1 EP 0404844 A1 EP0404844 A1 EP 0404844A1 EP 19890906070 EP19890906070 EP 19890906070 EP 89906070 A EP89906070 A EP 89906070A EP 0404844 A1 EP0404844 A1 EP 0404844A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- floor
- edge
- base
- base plate
- projectile
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 13
- 238000010304 firing Methods 0.000 description 7
- 239000002360 explosive Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 2
- 241000201308 Boschniakia Species 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B30/00—Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
- F42B30/003—Closures or baseplates therefor
Definitions
- the invention relates to a floor for support floors, as it is defined in the preamble of claim 1.
- a floor is known for example from DE 36 43 291.
- Such floors have an unfavorable deformation behavior. This leads to problems with sealing and with the swirl transmission through the guide band.
- the gas breakdown that is unavoidable at high gas pressures leads to the opening and closing of the sealing gap during the pipe passage and thus to the vibration excitation of the projectiles and to increased pipe failure.
- the cause of these sealing problems is that the axial force components attacking the rear of the projectile cause an axial deflection of the base plate, combined with a radial expansion of the front cover of the floor and a radial constriction of the rear floor or the rear guide band area.
- the radial deformation due to the axial force components during firing are superimposed on the radial deformations due to the simultaneously acting radial force components. This overlay causes the resulting radial deformation of the floor of the floor.
- Explosive projectiles are also known from US Pat. No. 4,327,643, the base plates of which are curved on the rear side.
- the base plate cannot be deformed much in the axial and radial directions (if there were a cavity inside these storeys, the floor of the storey would be without radial support from the Explosives collapse under the gas pressure up to the guide band when firing).
- the present invention has for its object to provide a floor of the type mentioned, in which a radial constriction in the guide band area This object is achieved by the features of the characterizing part of claim 1.
- the invention is therefore based on the idea of correcting the deformation behavior during firing by means of a curved shape of the base in such a way that the axial base bulge also causes a radial expansion in the rear floor base region.
- This shape-specific bottom deformation during firing ensures gas tightness and swirl transmission of the guide belt even at high gas pressures.
- FIG. 3b the cross section of an inventive
- Fig. 5 shows the cross section of an inventive
- FIG. 6 shows the cross section of a part of a supporting floor with a floor according to the invention.
- FIGS. 1a and 1b 10 denotes the floor, which consists of a floor covering 12 and a floor plate 13.
- the bottom shell 12 has a conical rear part 14 (also referred to as a boat tail).
- the BoatTail circumferential edge that is to say the transition region from the conical stern part to the cylindrical floor covering, is identified by 15.
- a cavity 16 On the side of the floor 10 facing away from the rear of the floor there is a cavity 16 in which there are no parts which axially support the base plate 13 and the base shell radially. In practice, parachutes of the submunition storeys are often arranged in this room. A guide band 17 is also applied to the base shell 12.
- the barrel walls of the weapon were not included in the figures In Fig. 1a, the floor 10 is shown in its rest position. As shown in FIG. 1b, the forces acting on the rear of the projectile cause an axial deflection of the base plate 13, combined with a radial expansion in the front area of the base cover 12.
- Fig. 2 shows the cross section of an inventive
- ⁇ maximum pitch angle
- Caliber D corresponds essentially to the transition radii between curvature and boat tail. This area is neglected in the following FIGS. 3 to 6, i. H. the curvature adjoins the inner edge of the boat tail.
- Fig. 3a the floor 30 of the invention is shown in the idle state.
- the floor covering of the floor is marked with 32, the bottom plate with 33, the conical rear part with 34 and the boat tail circumferential edge with 35.
- the parachute cavity, the guide band and the guide band trailing edge have the reference symbols 36, 37 or 37 'and 38 or 38'.
- the curvature of the bottom plate 33 can also be described using the following relationship:
- intersection 39 can be in front of as well as behind the guide band edge 38 or 38 ' lie.
- the right half of the projectile shows an embodiment in which the guide band edge lies behind the intersection 39, while the left half of the storey floor shows an embodiment in which the guide band rear edge 38 'lies in front of the intersection 39.
- the leading edge 38 or 38 ′ of the guide tape viewed in the flight direction, must lie in front of the circumferential edge of the boat tail 35 (g ⁇ 0).
- the wall thickness W of the flat base is equal to the greatest wall thickness of the spherical cap base and is 30 mm.
- the radius R is equal to 130 mm.
- the first gas breakthrough took place at 3600 bar, while for the spherical cap bottom the gas breakthrough did not occur until 4500 bar.
- 5 shows a floor 50 with a conical base plate 53 as a further example.
- Bottom cover is designated 52, the conical tail section with 54 and the boat tail circumferential edge with 55. Similar to the dome bottom, the point of intersection of the bottom cone with the bottom cover 59 can lie in front of or behind the trailing edge 58 or 58 '.
- the present invention is particularly advantageous for artillery-carrying projectiles with a thin-walled projectile casing. This is because the requirement for maximum usable space limits the floor height and the thin wall of the projectile shell necessitates radial support of the projectile shell in the guide band area by the base shell.
- a radial widening of the bottom is required.
- a radial squeezing of the guide band in this area is required.
- the floor of the storey is designated by 60 and in turn consists of a base cover 62 and a base plate 63.
- the base cover 62 has a conical rear part 64, the boat tail edge of which is designated 65.
- a part of a two-part guide band 67 sits on the bottom cover 62.
- the cavity for a parachute, not shown, is identified by 66.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structure Of Belt Conveyors (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Toys (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Automotive Seat Belt Assembly (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3827763A DE3827763A1 (de) | 1988-08-16 | 1988-08-16 | Geschossboden fuer traegergeschosse |
| DE3827763 | 1988-08-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0404844A1 true EP0404844A1 (de) | 1991-01-02 |
| EP0404844B1 EP0404844B1 (de) | 1993-08-04 |
Family
ID=6360948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89906070A Expired - Lifetime EP0404844B1 (de) | 1988-08-16 | 1989-05-26 | Geschossboden für trägergeschosse |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5033388A (de) |
| EP (1) | EP0404844B1 (de) |
| JP (1) | JPH03500680A (de) |
| DE (2) | DE3827763A1 (de) |
| DK (1) | DK22790A (de) |
| ES (1) | ES2020026A6 (de) |
| GR (1) | GR890100476A (de) |
| PT (1) | PT91461B (de) |
| WO (1) | WO1990002308A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4000167C2 (de) * | 1990-01-05 | 1994-04-14 | Rheinmetall Gmbh | Drallstabilisiertes Trägergeschoß mit einem metallischen Führungsband |
| US5348933A (en) * | 1991-01-24 | 1994-09-20 | Ishihara Sangyo Kaisha, Ltd. | Substituted pyridinesulfonamide compound or its salt, process for preparing the same, and herbicide containing the same |
| US11300389B1 (en) * | 2018-05-04 | 2022-04-12 | The United States Of America As Represented By The Secretary Of The Army | Slip baseplate |
| DE102019116283A1 (de) * | 2019-06-14 | 2020-12-17 | Ruag Ammotec Gmbh | Projektil, Verfahren zum Herstellen eines Projektils und Munition |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE252940C (de) * | 1911-04-24 | |||
| US2507878A (en) * | 1943-10-16 | 1950-05-16 | Jr Thomas A Banning | Projectile |
| DE2001755A1 (de) * | 1969-01-20 | 1971-04-01 | Bofors Ab | Sprenggranate |
| DE2308428A1 (de) * | 1973-02-21 | 1974-08-29 | Diehl Fa | Hartkerngeschoss |
| ES476388A1 (es) * | 1978-12-27 | 1979-04-16 | Lasheras Barrios Fernando | Mejoras introducidas en la fabricacion de proyectiles. |
| DE3643291A1 (de) * | 1986-12-18 | 1988-06-23 | Rheinmetall Gmbh | Drallstabilisiertes traegergeschoss |
| DE3706033A1 (de) * | 1987-02-25 | 1988-09-08 | Diehl Gmbh & Co | Geschoss mit einem submunitionskoerper |
| DE3804351A1 (de) * | 1988-02-12 | 1989-08-24 | Rheinmetall Gmbh | Sprenggeschoss |
-
1988
- 1988-08-16 DE DE3827763A patent/DE3827763A1/de not_active Withdrawn
-
1989
- 1989-05-26 US US07/469,590 patent/US5033388A/en not_active Expired - Lifetime
- 1989-05-26 JP JP1505504A patent/JPH03500680A/ja active Pending
- 1989-05-26 EP EP89906070A patent/EP0404844B1/de not_active Expired - Lifetime
- 1989-05-26 WO PCT/EP1989/000584 patent/WO1990002308A1/de not_active Ceased
- 1989-05-26 DE DE8989906070T patent/DE58905177D1/de not_active Expired - Lifetime
- 1989-07-25 GR GR890100476A patent/GR890100476A/el unknown
- 1989-08-14 ES ES8902855A patent/ES2020026A6/es not_active Expired - Lifetime
- 1989-08-16 PT PT91461A patent/PT91461B/pt not_active IP Right Cessation
-
1990
- 1990-01-26 DK DK022790A patent/DK22790A/da not_active Application Discontinuation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9002308A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0404844B1 (de) | 1993-08-04 |
| DK22790D0 (da) | 1990-01-26 |
| DK22790A (da) | 1990-03-08 |
| PT91461B (pt) | 1995-07-06 |
| PT91461A (pt) | 1990-03-08 |
| JPH03500680A (ja) | 1991-02-14 |
| GR890100476A (el) | 1991-12-30 |
| WO1990002308A1 (de) | 1990-03-08 |
| DE58905177D1 (de) | 1993-09-09 |
| US5033388A (en) | 1991-07-23 |
| DE3827763A1 (de) | 1990-03-01 |
| ES2020026A6 (es) | 1991-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
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| 17Q | First examination report despatched |
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| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: RHEINMETALL GMBH |
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| GRAA | (expected) grant |
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