WO2022128864A1 - Aufschlagzünder - Google Patents
Aufschlagzünder Download PDFInfo
- Publication number
- WO2022128864A1 WO2022128864A1 PCT/EP2021/085394 EP2021085394W WO2022128864A1 WO 2022128864 A1 WO2022128864 A1 WO 2022128864A1 EP 2021085394 W EP2021085394 W EP 2021085394W WO 2022128864 A1 WO2022128864 A1 WO 2022128864A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- head
- needle
- fuse
- impact
- pressure element
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C1/00—Impact fuzes, i.e. fuzes actuated only by ammunition impact
- F42C1/02—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
- F42C15/24—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means
Definitions
- the present invention relates to an impact fuse for a projectile.
- Impact fuzes for projectiles typically have a fuze body mountable on a projectile and incorporating a primer detonator system for igniting a main charge of the projectile and a firing pin for piercing the detonator system's primer upon impact with a target.
- the firing needle in the fuse body 12 has a needle head 25 and a needle bar 26, the needle head 25 being arranged in the front region of the fuse body 12 behind a cover plate 21 and the needle bar 26 having a piercing tip 27 at the rear end for piercing the ignition charge in the detonator system 16 having.
- a flat impact ie an impact of the fuze at a flat - in particular in contrast to an acute - angle on a target body causes a partial deformation of the front part of the fuze body 12, which Tilting of the needle head 25 in the direction of the impact surface results, which in turn can cause the needle bar 26 to buckle and/or jam in the fuse body 12, so that the needle bar 26 is no longer properly pressed in the direction of the detonator system 16 and, as a result, the ignition charge in the Detonator system can pierce.
- the detonation of the main charge of the projectile then also does not take place.
- the impact fuze of the invention comprises a fuze body mountable on a projectile, the fuze body having a head portion remote from the projectile with a head end, a bottom portion facing the projectile and a longitudinal axis, and a detonator system with a primer in the bottom portion of the fuze body.
- the impact igniter also has an igniting needle in the head section of the igniter body, the igniting needle having a needle bar, a needle head on an end of the needle bar facing the head end of the igniter body, and a piercing tip on an end of the needle bar facing the detonator system, the igniting needle Impact fuse is movable on a target body in the direction of the detonator system, so that the piercing tip of the firing needle pierces the ignition charge in the detonator system.
- a pressure element is also provided, which is arranged loosely (in the sense of not fixed) in the head section of the igniter body between the head end of the igniter body and the needle head of the ignition needle, the pressure element being designed and arranged in the head section of the igniter body such that it can tilt relative to the detonator body and relative to the pin head of the detonator needle, so that if the head portion of the detonator body is deformed when it hits a target body, it can press on the pin head of the detonator pin without tilting the pin head relative to the longitudinal axis of the detonator body.
- the additional pressure element is tilted when the head section of the fuse body is deformed, but due to its decoupling from the needle head it keeps the Alignment of the needle head and thus also the needle bar upright, ie prevents, for example, the needle head from tilting and the needle bar buckling or jamming as a result.
- This additional pressure element can therefore ensure that the firing pin remains functional and can pierce the firing charge in the detonator system, even if the impact fuse hits a target body flat.
- This guarantee of the functionality of the impact detonator even if it hits a target body flat can be achieved by means of the additional pressure element with a simple and cost-effective design. In many conventional design variants of impact fuses, it is also sufficient to simply insert the special pressure element without the fuse body and the firing needle having to be significantly modified.
- the impact fuse of the invention can be used for any type of projectile.
- the impact fuze of the invention is not limited to any particular squib type detonator systems.
- the pressure element preferably has a rear side which faces the ignition needle and is designed in the shape of a dome. In this way, the back of the pressure element can remain in contact with the needle head of the firing pin, even when the pressure element is tilted (i.e. both when striking a target body vertically and flatly), preferably even in the area of the central longitudinal axis of the fuse body, along the the firing pin is movable in the direction of the detonator system.
- the dome or its curvature can be spherical or aspherical.
- the bulge can rise above an elliptical or square base.
- the base area can in particular be circular or square.
- the curvature can include a planar area in the area above the centroid of the base area.
- the planar area is preferably located symmetrically around the theoretically highest point of the dome if this would not include a planar area.
- the flat area of the rear side - or in other words the flat area of the dome-shaped surface of the rear side - accounts for less than 30%, in particular less than 25% of the total area of the dome-shaped surface.
- the spherical or aspherical surface profile of the rear side of the pressure element can also be formed by a large number of planar elements, so that the dome-shaped rear side is formed by a polyhedron.
- the side of the needle head of the ignition needle that faces the pressure element is preferably formed essentially flat.
- the tilting of the pressure element relative to the pin head can be better guaranteed: due to the dome-shaped design of the rear side of the pressure element and the flat design of the side of the pin head that faces the pressure element, the pressure element can fall below when the detonator hits a target at a flat angle due to its loose or unfixed arrangement, so to speak on the side of the needle head that faces the pressure element, while simultaneously exerting pressure on the needle head - or, to put it another way, at the same time in a straight line, i.e. in the direction of the longitudinal axis of the fuse body, forwarding the deformation of the Head portion of the igniter body on the pressure element on the needle head.
- the back of the pressure element has a planar area as described above, it is possible - despite the loose arrangement of the pressure element - to establish a planar contact between the pressure element and the side of the needle head facing the pressure element, so that-if-only when the fuse strikes a Target body at a shallow angle tilting of the pressure element takes place.
- the front side of the pressure element facing the head end of the igniter body can, for example, be designed to be essentially planar.
- the pressure element can be designed, for example, as a hemisphere or quasi-lens-shaped with a planar surface as the front side and an aspheric or spherical or faceted surface as the back side, with both "hemisphere” and “lens” on its back side, as before described, plan area may include.
- the front side of the pressure element can comprise two planar areas, one planar area being raised in steps relative to the other planar area.
- the stepped, raised planar area of the front side can be opposite to a previously described planar area of the rear, or to put it another way: Regardless of whether the rear includes a planar area or not, the stepped, raised area of the front is preferably opposite to the (theoretically) highest point of the dome-shaped back arranged, the area in particular oriented symmetrically with respect to this point.
- a contact area can be produced between the head end of the igniter body and the pressure body due to the stepped, raised planar area, which, however, compared to an essentially completely planar front side, offers the advantage that a certain contact can be produced between the head end, but with a smaller surface area , so that when the igniter hits flat, a tilting movement of the pressure element is easier.
- the front side of the pressure element facing the head end of the igniter body can, for example, also be configured analogously to one of the previously described rear sides of the pressure element.
- the pressure element can have a spherical shape, an elliptical shape, an oval shape, the shape of a polyhedron on the back and front, or different combinations, such as a spherical shape on the front and an elliptical or aspherical shape on the backside etc
- the pressure element preferably has a solid molded body made of a metallic material.
- the pressure element is dimensionally stable and can maintain its shape and thus its functionality even when the fuse body is deformed when it hits a target body.
- the pressure element is made of aluminum, for example.
- the fuse body has a channel in its head section, in which the firing needle is arranged and guided and in which the pressure element is also located.
- this channel preferably has a first channel section for guiding the needle head and the pressure element and a second channel section for guiding the needle bar, the second channel section being narrower than the first channel section.
- the firing pin and channel are substantially coaxial with the central longitudinal axis of the fuse body.
- the channel or its first and second channel sections are preferably shaped essentially cylindrically, preferably essentially coaxially to the longitudinal axis of the fuse body.
- the pressure element is preferably designed in such a way that the diameter of the pressure element is smaller than the width of the channel in all directions.
- the igniter body has an access opening at its head end for mounting the igniter needle, the access opening being closed by a cover plate (after the igniter needle has been inserted into the igniter body.
- the pressure element is also inserted into the igniter body through this access opening and is then placed loosely between the cover plate and the needle head of the firing pin.
- FIG. 1 is a longitudinal sectional view of an impact detonator according to an embodiment of the invention.
- FIG. 2 shows four sketches to illustrate the course of deformation of the impact fuse from FIG. 1 when it strikes a target body at an angle
- FIG. 3 shows four sketches to illustrate the course of deformation of a conventional impact fuse when it strikes a target body at an angle.
- FIG. 1 illustrates the structure of an impact fuse using the example of an explosive projectile.
- Fig. 1 shows the structure of the impact fuse 10 in the rest state or in the flight state, i.e. before the impact fuse 10 has struck a target body.
- the impact igniter 10 has an igniter body 12 made of aluminum, for example.
- the igniter body 12 has a head section 12a at the front in the direction of flight 13 with a head end 12b and a bottom section at the rear in the direction of flight 13 12c.
- a fastener 14 for attaching the igniter body 12 to the body of the projectile.
- the fastening device 14 has, for example, a thread for screwing the fuse body 12 into a projectile cavity.
- the fastening device 14 of the fuse body 12 can also be designed differently.
- the igniter body 12 has a central longitudinal axis 18 which also defines an axial direction of the igniter body 12 .
- the direction of flight 13 of the projectile and of the impact fuse 10 is essentially parallel or coaxial to this longitudinal axis 18.
- an ignition charge space 15 which is, for example, essentially cylindrical in shape and arranged essentially coaxially to the longitudinal direction 18 .
- a detonator system with an ignition charge 16 is accommodated in this ignition charge space 15 .
- the detonator system 16 has, for example, an ignition chain.
- the ignition charge of the detonator system 16 can be triggered mechanically through a piercing opening 17, the piercing opening 17 being provided in the region of the longitudinal axis 18 on the side of the detonator system 16 facing the head section 12a.
- the triggered ignition charge of the detonator system 16 can then trigger the main charge of the projectile.
- the firing needle 24 has a needle bar 26 , a needle head 25 on the end of the needle bar 26 facing the head end 12b of the fuse body 12 and a piercing tip 27 on the end of the needle bar 26 facing the detonator system 16 .
- the piercing tip 17 is used to trigger the ignition charge by piercing the piercing opening 17 of the detonator system 16.
- the needle head 25 of the firing needle 24 is wider than the needle bar 26.
- the channel 22 in the head section 12a of the ignition body 12 therefore has a wider first channel section 22a for receiving and guiding the needle head 25 and a narrower second channel portion 22b for receiving and guiding the needle bar 26.
- the first and second channel portions 22a, 22b are both essentially hollow-cylindrical in shape.
- Firing needle 24 and channel 22 are each aligned substantially coaxially with longitudinal axis 18 .
- the firing needle 24 can be moved in the channel along the longitudinal axis 18 so that when the impact fuse 10 hits a target body it can be moved in the direction of the detonator system 16 by pressure on the needle head 25 so that the piercing tip 27 pierces the piercing opening 17 of the detonator system 16. to trigger the ignition charge.
- the head portion 12a of the igniter body 12 has an access opening 20 at its head end 12b through which the firing pin 24 can be inserted into the channel 22 of the igniter body 12. As shown in FIG. After the firing needle 24 has been installed, this access opening 20 is then closed and sealed by a cover plate 21 .
- a pusher 28 is also inserted into the channel 22 through the access opening 20 .
- the pressure element 28 is then arranged between the needle head 25 and the cover plate 21 in the first channel section 22a.
- the pressure element 28 is arranged loosely in the first channel section 22a, i.e. it is not fixed to any element of the cover plate 21, fuse body 12 and needle head 25, so that it can tilt within the first channel section 22a relative to the fuse body 12 and relative to the needle head 25 of the fuse needle 24, such as indicated by the arched arrows 29 in FIG.
- the pressure element 28 is designed in the form of a hemisphere. That is, the pressure element 28 has a front side 28a facing the cover plate 21, which is essentially flat, and a rear side 28b facing the needle head 25, which is dome-shaped, here spherical. In other embodiments of the invention, the front side 28a of the pressure element 28 can also be dome-shaped, for example spherical, so that the pressure element 28 is spherical.
- the side of the needle head 25 facing the pressure element 28 is preferably formed essentially flat.
- the pressure element 28 is in contact with the needle head 25.
- the pressure element is also preferably a solid (ie not hollow) molded part, for example made of aluminium.
- the pressure element 28 is arranged essentially coaxially to the longitudinal axis 18 .
- all diameters of the compression member 28 are sized smaller than the width of the first channel portion 22a in the head portion 12a of the igniter body 12 in all orientations.
- the head end 12b of the fuse body 12 is pressed in so that the pressure element 21 presses against the needle head 25 with its rear side 28b.
- the ignition needle 24 is moved in the direction of the detonator system 16 and finally pierces the piercing tip 27 into the piercing opening of the detonator system 16 in order to trigger the ignition charge in the detonator system 16 .
- the pressure element 28 due to its dome-shaped rear side 28b, presses against the needle head 25 in the central area of the longitudinal axis 18, so that the pressure effect runs in a straight line, whereby the axial movement of the ignition needle 24 through the channel 22 along the longitudinal axis 18 is supported .
- FIG. 2 The functionality of the impact fuse 10 in the event of a flat impact on a target body is illustrated in FIG. 2 .
- the advantage of the construction of the impact fuse 10 according to the invention can be seen in particular by comparing FIG. 2 with FIG. 3 described above for a conventional impact fuse.
- the head section 12a of the igniter body 12 is deformed further and further in the region of the head end 12b, similar to that in FIG.
- this deformation of the fuse body 12 does not cause the needle head 25 to tilt due to the additional pressure element 28 and thus the needle rod 26 does not buckle or jam, so that the fuse needle 24 remains functional and the ignition charge in the detonator system 16 can pierce.
- the pressure element 28 is tilted within the first channel section 22a so that its planar front side 28a on the Target body is aligned.
- the pressing member 28 is slightly moved toward the bottom portion 12c of the igniter body 12 by the impact in the course of the deformation of the igniter body 12 .
- the tilting of the pressure element 28 does not cause any deformation of the first channel section 22 and, in particular, no tilting of the needle head 25 relative to the longitudinal axis 18. As can be seen from Fig.
- the dome-shaped rear side 28b remains instead of the pressure element 28 in the course of the deformation of the fuse body 12 in the central area of the longitudinal axis 18 with the planar upper side of the needle head 25 in contact.
- the pressure element 28 always presses in the course of the deformation of the fuse body 12 essentially centrally against the needle head 25 and essentially in a straight line in the direction along the longitudinal axis 18. In this way, the ignition needle 24 along the longitudinal direction 18 through the channel 22 in the direction of the detonator system 16 moves without tilting transversely to the longitudinal axis 18 in any way.
- the impact sensing of the impact fuse 10 can be improved or maintained even in the event of a flat impact on a target body.
- the functionality of the impact fuse and thus the usability of the projectile can be significantly improved.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
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- Fuses (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3196407A CA3196407A1 (en) | 2020-12-19 | 2021-12-13 | Percussion fuse |
EP21839378.3A EP4264170A1 (de) | 2020-12-19 | 2021-12-13 | Aufschlagzünder |
KR1020237013806A KR20230074232A (ko) | 2020-12-19 | 2021-12-13 | 격발 신관 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020007798.6A DE102020007798B4 (de) | 2020-12-19 | 2020-12-19 | Aufschlagzünder |
DE102020007798.6 | 2020-12-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022128864A1 true WO2022128864A1 (de) | 2022-06-23 |
Family
ID=79283035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/085394 WO2022128864A1 (de) | 2020-12-19 | 2021-12-13 | Aufschlagzünder |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP4264170A1 (de) |
KR (1) | KR20230074232A (de) |
CA (1) | CA3196407A1 (de) |
DE (1) | DE102020007798B4 (de) |
WO (1) | WO2022128864A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB130017A (en) * | 1917-12-18 | 1919-07-31 | Stanton Wilding Cole | An Improved Impact Fuse for Shells or Bombs. |
US2415262A (en) * | 1941-08-12 | 1947-02-04 | John B Semple | Fuse for projectiles |
DE1578498A1 (de) * | 1965-10-25 | 1970-12-03 | Snia Viscosa Societa Naz Ind A | Mechanische Zuendvorrichtung,vorzugsweise mit Schlagbolzen |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE315825C (de) | ||||
US2789507A (en) | 1952-06-14 | 1957-04-23 | Mach Tool Works Oerlikon | Fuze for rocket projectiles |
CH322297A (it) | 1952-10-25 | 1957-06-15 | Borletti Spa | Spoletta per proiettili, particolarmente per tiro antiaereo |
NL96947C (de) | 1955-05-07 | |||
US3956992A (en) | 1974-08-01 | 1976-05-18 | The United States Of America As Represented By The Secretary Of The Army | Wide-angle inertial impact fuze |
-
2020
- 2020-12-19 DE DE102020007798.6A patent/DE102020007798B4/de active Active
-
2021
- 2021-12-13 CA CA3196407A patent/CA3196407A1/en active Pending
- 2021-12-13 WO PCT/EP2021/085394 patent/WO2022128864A1/de unknown
- 2021-12-13 KR KR1020237013806A patent/KR20230074232A/ko active Search and Examination
- 2021-12-13 EP EP21839378.3A patent/EP4264170A1/de active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB130017A (en) * | 1917-12-18 | 1919-07-31 | Stanton Wilding Cole | An Improved Impact Fuse for Shells or Bombs. |
US2415262A (en) * | 1941-08-12 | 1947-02-04 | John B Semple | Fuse for projectiles |
DE1578498A1 (de) * | 1965-10-25 | 1970-12-03 | Snia Viscosa Societa Naz Ind A | Mechanische Zuendvorrichtung,vorzugsweise mit Schlagbolzen |
Also Published As
Publication number | Publication date |
---|---|
DE102020007798B4 (de) | 2022-07-14 |
CA3196407A1 (en) | 2022-06-23 |
EP4264170A1 (de) | 2023-10-25 |
DE102020007798A1 (de) | 2022-06-23 |
KR20230074232A (ko) | 2023-05-26 |
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