EP1680381A2 - Procede de fabrication d un dispositif de transmission multi- voies d un ordre pyrotechnique - Google Patents
Procede de fabrication d un dispositif de transmission multi- voies d un ordre pyrotechniqueInfo
- Publication number
- EP1680381A2 EP1680381A2 EP04805786A EP04805786A EP1680381A2 EP 1680381 A2 EP1680381 A2 EP 1680381A2 EP 04805786 A EP04805786 A EP 04805786A EP 04805786 A EP04805786 A EP 04805786A EP 1680381 A2 EP1680381 A2 EP 1680381A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pyrotechnic
- transmission
- groove
- relay
- manufacturing
- 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 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims description 27
- 238000003825 pressing Methods 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 238000002788 crimping Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000005474 detonation Methods 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C5/00—Fuses, e.g. fuse cords
- C06C5/06—Fuse igniting means; Fuse connectors
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C5/00—Fuses, e.g. fuse cords
- C06C5/08—Devices for the manufacture of fuses
Definitions
- the present invention relates generally to the field of multi-channel transmission devices of a pyrotechnic order comprising a pyrotechnic relay for lateral transmission, and more particularly to their manufacturing methods.
- this type of transmission device can be used in any kind of pyrotechnic system, and in particular in any pyrotechnic system of civil or military vehicles, such as an aircraft.
- Multi-channel transmission devices of a pyrotechnic order comprising a pyrotechnic relay of lateral transmission are well known in the prior art, in particular for their high level of reliability in the transmission of the pyrotechnic order.
- This type of relay generally has an envelope comprising a flat portion intended to be opposite a plurality of ends of pyrotechnic input and output lines. This flat portion of the envelope is in fact intended to be projected against the ends of the pyrotechnic output lines during the detonation of the pyrotechnic relay, in order to transmit the pyrotechnic order to these same lines.
- the object of the invention is therefore to propose a device for multichannel transmission of a pyrotechnic order comprising a pyrotechnic relay for lateral transmission at least partially remedying the drawbacks mentioned above relating to the embodiments of the prior art.
- the invention relates to a method of manufacturing a multi-channel transmission device of a pyrotechnic order comprising a lateral transmission pyrotechnic relay, the latter having an envelope comprising a flat portion intended to be opposite a plurality of ends of pyrotechnic input and output lines.
- the manufacturing process comprises the following steps: - the introduction, in a groove provided on the device, of a detonating cord of axial transmission comprising an envelope; and - the forming, by pressing, of the detonating cord of axial transmission in the groove, so that the detonating cord formed constitutes the pyrotechnic relay of lateral transmission having a flat portion, intended to be opposite the plurality of 'ends of the pyrotechnic input and output lines.
- the particular dimensions of the lateral transmission pyrotechnic relay are no longer obtained during the initial manufacture of the latter, but by forming a detonating cord of axial transmission inside of the groove.
- the pyrotechnic relay can advantageously be manufactured from a detonating cord of axial transmission, preferably of circular section and corresponding to a low-cost manufactured product "sold in the catalog", and by transforming this axial transmission cord into a pyrotechnic relay for lateral transmission using a groove whose precise dimensions can be obtained very easily, for example by performing a simple machining.
- the manufacturing method according to the invention is considerably less costly to implement, than those proposed in the prior art, aiming to separately manufacture the pyrotechnic relay for lateral transmission of the plug of the device, then to assemble these same two elements after their manufacture.
- the detonating cord of axial transmission is of circular section, and has for example a diameter of about 3.5 mm.
- this type of low cost cord is widely used, which contributes to making the manufacturing process also inexpensive.
- the envelope of the detonating axial transmission cord is made of lead, aluminum or one of its alloys, these materials being in fact entirely optimized to ensure a good projection of this envelope during the detonation of the relay.
- the groove and the pyrotechnic relay for lateral transmission are produced so as to each have a substantially rectangular section, this particular geometry being effectively adapted to provide an effect. satisfactory plate raising, and therefore good priming of the ends of the pyrotechnic output lines.
- the step of forming by pressing the detonating cord of axial transmission is carried out so as to cause the crimping of the latter inside the groove. In this way, it is no longer necessary to carry out a step of bonding the relay inside the groove, as was the case in the prior art.
- the automatic obtaining of the crimping of the latter during the forming step directly results in a non-negligible reduction in the time necessary for the implementation of the manufacturing process of the multi-channel transmission device.
- the groove is formed in a bushel of the multi-channel transmission device, and the method comprises a step of assembling a cover of the multi-channel transmission device on this same bushel, this step being performed so that a plurality of through holes provided on the cover are closed at one of their ends by the flat portion of the casing of the pyrotechnic relay.
- the method further comprises a step of assembling the assembly constituted by the plug provided with the pyrotechnic relay and the cover, on a housing of the multi-channel transmission device, this step being carried out by so that a plurality of through passages provided on the housing are respectively in the extension of the through holes provided on the cover, the through passages of the housing being designed so that each is able to receive a pyrotechnic input line or exit.
- FIG. 1 is a partially exploded perspective view of a multi-channel transmission device of a pyrotechnic order comprising a pyrotechnic relay for lateral transmission, obtained following the implementation of a manufacturing method according to a preferred embodiment of the present invention
- - Figures 2a to 2d show schematic views of various stages of the manufacturing process according to the preferred embodiment of the present invention, leading to the obtaining of the transmission device of Figure 1.
- the device 1 comprises a housing 2 constituting its main body, this housing 2 being provided with a plurality of through passages 4, each designed so as to be able to receive a pyrotechnic input or output line 6.
- the through passages 4 are made so as to be mutually parallel, and also parallel to a first direction represented schematically by the vertical arrow 7 in FIG. 1.
- the pyrotechnic lines 6 are preferably but not exclusively located substantially in the same plane.
- the pyrotechnic lines 6 mounted in the passages 4, for example by screwing are of the conventional type and preferably capable of being used either as an input line or an output line.
- the transmission device 1 can be equipped with six identical pyrotechnic lines 6, one or more of which are provided to constitute the input lines of the device 1.
- the number of input lines and the number of output lines can be adapted according to the needs encountered in the specific use of the transmission device 1, it can indeed be used in any kind of pyrotechnic system, and in particular in any pyrotechnic system civil or military craft, such as an aircraft.
- the housing 2 of the device preferably made of a light alloy, comprises a cylindrical housing 8 inside which is arranged an assembly 10 comprising a plug 12, a pyrotechnic relay for lateral transmission 14, as well as 'A cover 16 assembled on the plug 12.
- the assembly 10 is preferably of generally cylindrical shape of circular section, and is arranged substantially parallel to a second direction shown schematically by the horizontal arrow 18 in Figure 1, this second direction 18 being perpendicular to the first direction 7 above. Consequently, the assembly 10 is substantially perpendicular to the pyrotechnic input and output lines 6, as is clearly visible in FIG. 1.
- the through passages 4 of the transmission device 1 open out on the one hand outside the housing 2, and on the other hand in the housing 8 perpendicular to these same passages 4 and having a shape complementary to that of the assembly 10.
- the assembly 10 comprises the plug 12, for example made of steel, and having a groove 20 extending perpendicular to the first direction 7 and parallel to the second direction 18.
- the plug 12 can take the form of a cylinder truncated along a plane parallel to its longitudinal axis, for example so that the cylinder portion obtained is greater than a half-cylinder.
- the lateral transmission pyrotechnic relay 14 is located inside this groove
- the pyrotechnic relay 14 comprises an envelope 22, preferably made of lead or aluminum, in which an explosive powder 24 is located.
- the pyrotechnic relay 14 has a substantially rectangular section whose shape is complementary to that of the section of the groove 20, insofar as the casing 22 of the relay 14 fully matches the three walls (not referenced) defining this same groove 20.
- the pyrotechnic relay 14 could only partially match the walls of the groove 20.
- a groove 20 having a section of a shape other than rectangular the pyrotechnic relay 14 then marrying here again all or part of the pa kings of this groove 20.
- the shape of the pyrotechnic relay 14 as well as that of the groove 20 are chosen so that during the detonation of the relay 14, the latter can provide a satisfactory plate lift.
- a lateral transmission pyrotechnic relay 14 has generally a planar portion 26 substantially perpendicular to the first direction 7, this planar portion 26 being in fact that intended to be projected against the pyrotechnic lines 6 during the transmission of the pyrotechnic order.
- planar portion 26 of the casing 22 and a planar truncation surface 28 of the plug 12 jointly form a single planar surface 30 on which the cover 16 can be arranged.
- planar surface 30 is preferably in plan contact with a planar truncation surface 32 of this cover, the latter also taking the form of a cylinder truncated according to a plane parallel to its longitudinal axis.
- the cover 16 for example also made of steel, also has a plurality of through holes 34 oriented parallel to the first direction 7, each of these holes 34 being located in the extension of a through passage 4 provided in the housing 2.
- a first end 34a opens at a low end of a passage 4 of the housing, and a second end 34b is closed by the pyrotechnic relay 14, and more particularly by the flat portion 26 of its envelope 22.
- the flat portion 26 is opposite one end 36 of each pyrotechnic line inlet and outlet 6, each end 36 being effectively located inside a through hole 34 extending the through passage 4 in which is mounted the pyrotechnic line 6 considered.
- an detonating axial transmission cord 40 is placed inside the groove 20, this detonating cord 40 preferably being of circular section, and having for example a diameter of approximately 3.5 mm.
- the detonating cord 40 rests by gravity at the bottom of the groove 20, while projecting outside of it because of its diameter greater than the depth of the groove 20.
- the detonating cord 40 is arranged in this groove 20 so that its longitudinal axis 42 is substantially parallel to the second direction 18 in which this same groove extends 20.
- the detonating cord 40 used is a standard product, the envelope 44 of which is made either of lead, aluminum or an aluminum alloy.
- the axial transmission cord 40 is such that its envelope 44 follows the entirety of the walls of the groove 20, and such that it has a planar portion 50 situated in the same plane as the planar surface of truncation 28 of the plug 12, this planar portion 50 being shown in contact with the press 48 in FIG. 2c.
- the axial transmission cord 40 has therefore been transformed by forming in the groove 20 to constitute the pyrotechnic relay for lateral transmission 14 described above, the flat portion 50 of the cord 40 constituting in fact the portion of flat envelope 26 intended to ensure the projection of the plate.
- this step of forming the detonating cord 40 is advantageous in the sense that it makes it possible simultaneously to crimp the pyrotechnic relay 14 obtained inside the groove 20, due to the significant efforts exerted by the envelope 44 on the walls of the groove 20, these forces resulting of course from the compression of the detonating cord 40.
- the dimensions of the groove 20 and of the detonating cord 40 are chosen so that the latter fully integrates the three walls of the groove 20 once the forming step is completed, and so that the detonating cord 40 undergoes a predetermined compression ratio during this step .
- the cover 16 is rigidly assembled on the plug 12 fitted with the pyrotechnic relay 14. This step can be carried out by first contacting the flat surfaces 30 and 32, then by securing the plug 12 and the cover 16, for example using pins. As indicated above, the assembly of the cover 16 on the plug 12 generates the obturation of the second ends 34b of the through holes 34, this obturation being effected by means of the planar portion 26 of the casing 22 of the pyrotechnic relay 14.
- the assembly 10 obtained is inserted into the housing 8 of the housing 2 having a shape complementary to that of this assembly 10, so that the first ends 34a of the holes through 34 are located opposite the through passages 4, thus causing the latter to be located in the extension of the through holes 34.
- various conventional operations are then carried out in order to obtain the transmission device 1 of FIG. 1, such as "that the installation of the pyrotechnic input and output lines 6 in their respective passages 4.
- various modifications can be made by the ho even from the profession to the method of manufacturing a device 1 for multi-channel transmission of a pyrotechnic order which has just been described, only by way of nonlimiting example.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vibration Dampers (AREA)
- Air Bags (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Contacts (AREA)
- Mechanical Operated Clutches (AREA)
- Automatic Assembly (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0350800A FR2862132B1 (fr) | 2003-11-06 | 2003-11-06 | Procede de fabrication d'un dispositif de transmission multivoies d'un ordre pyrotechnique |
| PCT/FR2004/050543 WO2005047811A2 (fr) | 2003-11-06 | 2004-10-28 | Procede de fabrication d'un dispositif de transmission multivoies d'un ordre pyrotechnique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1680381A2 true EP1680381A2 (fr) | 2006-07-19 |
| EP1680381B1 EP1680381B1 (fr) | 2014-04-30 |
Family
ID=34508736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04805786.3A Expired - Lifetime EP1680381B1 (fr) | 2003-11-06 | 2004-10-28 | Procede de fabrication d'un dispositif de transmission multi-voies d'un ordre pyrotechnique |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1680381B1 (fr) |
| FR (1) | FR2862132B1 (fr) |
| NO (1) | NO337359B1 (fr) |
| WO (1) | WO2005047811A2 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1923761A (en) * | 1932-07-28 | 1933-08-22 | Trojan Powder Co | Manufacture of detonating fuse |
| FR1180037A (fr) * | 1957-06-13 | 1959-06-01 | Cordeau détonant | |
| FR82522E (fr) * | 1961-10-31 | 1964-02-28 | Le Ministre Des Armees Delegat | Perfectionnements aux dispositifs pour le découpage des tôles |
| FR2519784A1 (fr) * | 1982-01-13 | 1983-07-18 | Aerospatiale | Dispositif de transmission multivoies d'un ordre pyrotechnique comportant un ensemble relais a relevement de pieces |
| MW4288A1 (en) * | 1987-09-24 | 1989-05-10 | Aeci Ltd | A low energy fuse multi-connector |
| FR2657752B1 (fr) * | 1990-02-07 | 1993-05-28 | Blanchet Jean Claude | Appareil de detection de touches a la peche. |
| FR2684752B1 (fr) * | 1991-12-09 | 1995-05-12 | Sae Alsetex | Relais d'amorcage par cordeau detonant. |
-
2003
- 2003-11-06 FR FR0350800A patent/FR2862132B1/fr not_active Expired - Lifetime
-
2004
- 2004-10-28 WO PCT/FR2004/050543 patent/WO2005047811A2/fr not_active Ceased
- 2004-10-28 EP EP04805786.3A patent/EP1680381B1/fr not_active Expired - Lifetime
-
2006
- 2006-06-02 NO NO20062543A patent/NO337359B1/no not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005047811A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005047811A3 (fr) | 2005-10-06 |
| NO20062543L (no) | 2006-06-02 |
| FR2862132B1 (fr) | 2006-02-10 |
| NO337359B1 (no) | 2016-03-29 |
| FR2862132A1 (fr) | 2005-05-13 |
| WO2005047811A2 (fr) | 2005-05-26 |
| EP1680381B1 (fr) | 2014-04-30 |
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