EP1582321B1 - Vorrichtung zur Durchtrennung einer Fahrzeugstruktur - Google Patents

Vorrichtung zur Durchtrennung einer Fahrzeugstruktur Download PDF

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Publication number
EP1582321B1
EP1582321B1 EP05290641A EP05290641A EP1582321B1 EP 1582321 B1 EP1582321 B1 EP 1582321B1 EP 05290641 A EP05290641 A EP 05290641A EP 05290641 A EP05290641 A EP 05290641A EP 1582321 B1 EP1582321 B1 EP 1582321B1
Authority
EP
European Patent Office
Prior art keywords
tube
cutting device
charge
pyrotechnic charge
groove
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.)
Not-in-force
Application number
EP05290641A
Other languages
English (en)
French (fr)
Other versions
EP1582321A1 (de
Inventor
Evrard Borg
Eric Laspesa
Laurent D'emmanuelle
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.)
Safran Ceramics SA
Original Assignee
SNPE Materiaux Energetiques SA
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
Application filed by SNPE Materiaux Energetiques SA filed Critical SNPE Materiaux Energetiques SA
Publication of EP1582321A1 publication Critical patent/EP1582321A1/de
Application granted granted Critical
Publication of EP1582321B1 publication Critical patent/EP1582321B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/04—Severing by squeezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
    • F42B15/36—Means for interconnecting rocket-motor and body section; Multi-stage connectors; Disconnecting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
    • F42B15/36—Means for interconnecting rocket-motor and body section; Multi-stage connectors; Disconnecting means
    • F42B15/38—Ring-shaped explosive elements for the separation of rocket parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/006—Explosive bolts; Explosive actuators

Definitions

  • the technical field of the invention is that of automotive safety involving cutting devices of a structure such as, for example, a dashboard, in order to activate a safety device.
  • the cutting devices according to the invention are particularly suitable for the implementation of protective cushions in a motor vehicle.
  • Patent EP 0 273 061 describes a separation joint between two structures and involves a linear explosive charge confined in a flattened tube. The two structures fit into each other and the firing of the explosive charge causes an expansion of the tube which then deforms one of the two structures causing their disengagement.
  • the explosive charge is not specifically described but the description reveals some clues that suggest that it is a detonating charge.
  • the separation device disclosed in US Patent 6,170,400 or in US Pat. No. 5,372,071 involves a detonating cord whose firing will cause the deformation of the tube in which it is housed in order to push a piston to separate two sub -sets.
  • the cutting devices according to the invention involve explosion cords, housed in flattened tubes and their firing causes an expansion of the section of said tubes to cut a structure. Explosion cords have slower reaction speeds than those of detonating cords and therefore the associated pyrotechnic effects are less violent and in particular the risk of splintering and emission of an air-to-air shock wave. outside said devices become negligible.
  • the cutting devices according to the invention are particularly suitable for motor vehicles to the extent that they are reliable and effective, while having an increased level of safety by limiting the intensity of the reaction and therefore the potential for bodily injury.
  • the subject of the present invention relates to a cutting device according to claim 1.
  • This equivalence is desirable because a deflagration although defining a reaction longer and less violent than a detonation remains relatively indeterminate as to the value of certain parameters which characterize it.
  • the combustion rate of the pyrotechnic charge is between 1000m / s and 2000m / s.
  • the explosive charges retained for the cutting devices according to the invention are sufficiently sharp to cause the cutting of a structure in a motor vehicle, without presenting the inconveniences associated with the use of a detonating charge, such as, for example, the risks of rupture of the cutting device with emission of undesirable pyrotechnic effects such as air shock wave and splinters projection.
  • the pyrotechnic charge comprises a plurality of strands, for example those described in US Pat. No. 4,220,087.
  • the tube is metallic.
  • said tube has a good aptitude for plastic deformation.
  • the tube is closed at each of its ends by a plug to contain the pyrotechnic effects inside said tube.
  • the tube is aluminum.
  • a space between the pyrotechnic charge and the tube said space being filled by an elastomer foam intended, on the one hand, to maintain said charge in the center of said tube and, on the other hand, to increase the pressurizing said tube.
  • an elastomer foam intended, on the one hand, to maintain said charge in the center of said tube and, on the other hand, to increase the pressurizing said tube.
  • a device for igniting the pyrotechnic charge comprising an igniter, is placed at one end of the tube.
  • the flattened tube is housed in a groove of the structure having a en-shaped section, the bottom of the groove having a secondary groove and the tube being held by means of a closing clip.
  • the linear density of the pyrotechnic charge is less than 4 g / m.
  • the cutting devices according to the invention have the advantage of not being dangerous for people, whether in normal or erratic operation, insofar as the effects produced remain low intensity. In addition, they are reliable because the firing of such compositions is perfectly controlled. Finally, because of the great diversity of the explosive compositions that can be used, the cutting devices according to the invention can be adapted to a large number of configurations related in particular to the thickness of the structure to be cut, to the material constituting said structure, on the surface to be cut.
  • Figure 1 is a side axial sectional view of a cutting device according to the invention, positioned relative to the structure to be cut and has not yet worked.
  • Figure 2 shows the cutting device of Figure 1 after operation.
  • the cutting device 1 is inserted into a groove 2 of the structure 3 to be cut, said groove 2 having a section of ⁇ and whose bottom has a secondary groove shaped v such that the thickness of the structure 3 at said secondary groove 4 is minimum.
  • a linear pyrotechnic charge consisting of three strands is housed in the center of a deformable hollow aluminum tube 6, said tube 6 being flattened so as to have an elongated section having two planar sides, parallel to each other, and interconnected by two segments in an arc of a circle, said load 5 being found in contact with the two planar sides of the tube 6.
  • the space remaining between the pyrotechnic charge 5 and the inner wall of the tube 6 is filled by an elastomer foam 7 to help maintain said load 5 at the center of said tube 6.
  • the tube 6 occupies the groove 2 without lateral play, that is to say, the two planar sides of the tube 6 are each in contact with the walls of the groove 2.
  • the groove 2 is formed in a bead of the structure 3 and the tube 6 is held in the groove 2 by means of a closing clip 8 covering said groove 2.
  • the tube 6 in the groove 2 is in contact with both the bottom of said groove 2 and the groove 2. lip 8 of closure.
  • An ignition device comprising a single igniter is placed near the tube 6. Two plugs close the ends of said tube 6.
  • the firing of the pyrotechnic charge 5 causes the production of gas in the tube 6 which then undergoes a significant internal pressure.
  • the tube 6 reacts by deforming to adopt a circular section.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Air Bags (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Harvester Elements (AREA)
  • Body Structure For Vehicles (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (10)

  1. Schneidvorrichtung (1), die eine lineare pyrotechnische Ladung (5) enthält, die in einer abgeflachten, verformbaren Röhre (6) angeordnet ist, die zum Schneiden einer Struktur (3) in einem Kraftfahrzeug nach dem Verbrennen der Ladung (5) geeignet ist, wobei das Verbrennen das Verformen der Röhre (6) nach sich zieht, was deren Querschnitt vergrößert, wobei die Verformung den Bruch der Struktur (3) verursacht, wobei die Schneidvorrichtung (1) dadurch gekennzeichnet ist, daß die Verbrennungsgeschwindigkeit der pyrotechnischen Ladung (5) kleiner ist als 3.000 m/s.
  2. Schneidvorrichtung (1) nach Anspruch 1, dadurch gekennzeichnet, daß die Verbrennungsgeschwindigkeit der pyrotechnischen Ladung (5) zwischen 1.000 m/s und 2.000 m/s liegt.
  3. Schneidvorrichtung (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die pyrotechnische Ladung (5) eine Vielzahl von Strängen aufweist.
  4. Schneidvorrichtung (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Röhre (6) metallisch ist.
  5. Schneidvorrichtung (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Röhre (6) an jedem ihrer Enden mit einem Stopfen verschlossen ist, um die pyrotechnischen Effekte im Inneren der Röhre (6) einzuschließen.
  6. Schneidvorrichtung (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Röhre (6) aus Aluminium besteht.
  7. Schneidvorrichtung (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß ein Raum zwischen der pyrotechnischen Ladung (5) und der Röhre (6) besteht, wobei der Raum mit einem Elastomerschaumstoff (7) gefüllt ist.
  8. Schneidvorrichtung (1) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß eine Zündvorrichtung der pyrotechnischen Ladung (5), die einen Zünder enthält, an einem der Enden der Röhre (6) angeordnet ist.
  9. Schneidvorrichtung (1) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die abgeflachte Röhre (6) in einer Rille (2) der Struktur (3), die einen └┘-förmigen Querschnitt hat, aufgenommen ist, wobei der Grund der Rille (2) eine Sekundärrille (4) aufweist und die Röhre (6) mittels eines Verschlußclips (8) gehalten wird.
  10. Schneidvorrichtung (1) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die lineare Dichte der pyrotechnischen Ladung (5) kleiner als 4 g/m ist.
EP05290641A 2004-04-02 2005-03-24 Vorrichtung zur Durchtrennung einer Fahrzeugstruktur Not-in-force EP1582321B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0403469A FR2868351B1 (fr) 2004-04-02 2004-04-02 Dispositif de decoupe d'une structure dans un vehicule automobile
FR0403469 2004-04-02

Publications (2)

Publication Number Publication Date
EP1582321A1 EP1582321A1 (de) 2005-10-05
EP1582321B1 true EP1582321B1 (de) 2007-03-07

Family

ID=34878487

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05290641A Not-in-force EP1582321B1 (de) 2004-04-02 2005-03-24 Vorrichtung zur Durchtrennung einer Fahrzeugstruktur

Country Status (7)

Country Link
US (1) US20050217466A1 (de)
EP (1) EP1582321B1 (de)
JP (1) JP2005288686A (de)
AT (1) ATE355945T1 (de)
DE (1) DE602005000645T2 (de)
ES (1) ES2281886T3 (de)
FR (1) FR2868351B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6097523B2 (ja) * 2012-10-26 2017-03-15 鹿島建設株式会社 装薬物および装薬物の設置方法
CN108195236B (zh) * 2018-01-12 2019-03-22 北京航空航天大学 一种分离式自毁安控装置及火箭
FR3130363B1 (fr) * 2021-12-15 2024-03-01 Pyroalliance Ensemble séparable par découpe pyrotechnique

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3076408A (en) * 1958-06-11 1963-02-05 Borg Warner Controlled fracturing of solids by explosives
US3698281A (en) * 1970-02-27 1972-10-17 Lockheed Aircraft Corp Explosive system
GB1301607A (de) * 1970-06-25 1973-01-04
US4220087A (en) * 1978-11-20 1980-09-02 Explosive Technology, Inc. Linear ignition fuse
US4301707A (en) * 1979-10-29 1981-11-24 Mcdonnell Douglas Corporation Embedded explosive severance of non-metallic materials
US4685376A (en) * 1985-06-24 1987-08-11 Mcdonnell Douglas Corporation Separation system
US5392684A (en) * 1993-06-25 1995-02-28 The Ensign-Bickford Company Explosive thrust-producing coupling
US5372071A (en) * 1993-07-13 1994-12-13 Tracor, Inc. Thrusting separation system
US5478106A (en) * 1994-07-22 1995-12-26 Tip Engineering Group, Inc. Method and arrangement for forming an air bag deployment opening
JP3691076B2 (ja) * 1997-09-08 2005-08-31 シミュラ・インコーポレーテッド 分散された装薬インフレータシステム
US6454038B2 (en) * 1998-04-09 2002-09-24 Certime Amsterdam B.V. Collapsible panel and method for controlled collapsing thereof
US6336611B1 (en) * 1998-04-09 2002-01-08 Certime Amsterdam B.V. Collapsible panel and method for controlled collapsing thereof
FR2779223B1 (fr) * 1998-06-02 2000-08-11 Aerospatiale Dispositif de decoupe de pieces non metalliques au moyen d'un tube a expansion pyrotechnique
US6176517B1 (en) * 1998-10-23 2001-01-23 Autoliv Aspinc. Gas generating apparatus
FR2799708B1 (fr) * 1999-09-24 2001-12-07 Livbag Snc Structure metallique gonflable a chargement pyrotechnique integre
FR2806342B1 (fr) * 2000-03-15 2002-08-09 Lacroix Soc E Dispositif pour la rupture controlee sans choc de structures
US6886469B2 (en) * 2002-05-17 2005-05-03 Zodiac Automotive Us Inc. Distributed charge inflator system

Also Published As

Publication number Publication date
EP1582321A1 (de) 2005-10-05
DE602005000645T2 (de) 2007-11-08
FR2868351B1 (fr) 2006-06-23
DE602005000645D1 (de) 2007-04-19
ATE355945T1 (de) 2007-03-15
JP2005288686A (ja) 2005-10-20
US20050217466A1 (en) 2005-10-06
ES2281886T3 (es) 2007-10-01
FR2868351A1 (fr) 2005-10-07

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