WO2001029498A1 - Dispositif et procede de fixation d'un systeme d'amorçage sur un corps d'une grenade - Google Patents
Dispositif et procede de fixation d'un systeme d'amorçage sur un corps d'une grenade Download PDFInfo
- Publication number
- WO2001029498A1 WO2001029498A1 PCT/FR2000/002800 FR0002800W WO0129498A1 WO 2001029498 A1 WO2001029498 A1 WO 2001029498A1 FR 0002800 W FR0002800 W FR 0002800W WO 0129498 A1 WO0129498 A1 WO 0129498A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tube
- grenade
- priming system
- fixing
- welding
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000000977 initiatory effect Effects 0.000 title abstract 3
- 230000037452 priming Effects 0.000 claims description 61
- 238000003466 welding Methods 0.000 claims description 24
- 238000002788 crimping Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000002360 explosive Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000219991 Lythraceae Species 0.000 description 1
- 235000014360 Punica granatum Nutrition 0.000 description 1
- 229910000842 Zamak Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/02—Fuze bodies; Fuze housings
Definitions
- the technical field of the present invention is that of devices allowing the fixing of a priming system on a body of a grenade, in particular of a grenade with a shaped charge intended to be carried and dispersed on trajectory by a projectile (shell or rocket).
- the priming systems of such grenades are generally fixed to the body of the grenade by riveting or screwing.
- Such a fixing device does not allow the priming system to be easily replaced by a new system, for example a more efficient system, incorporating for example a self-destruct device.
- the rivets must be cut and they can no longer be used to fix a new priming system.
- the grenade body cannot be reused and the grenade must be completely replaced.
- the object of the present invention is to provide a device for fixing a priming system on a grenade body which allows, in a safe and economical manner, a subsequent replacement of the priming system.
- the invention also relates to a method for easily securing a priming system and a grenade body.
- the method according to the invention also makes it possible to ensure such a joining in the context of an operation to upgrade a stock of grenades.
- the subject of the invention is a device for fixing a priming system on a body of a grenade, device characterized in that it is constituted by a support made integral by a means of fixing the body of the grenade , support comprising a thin cylindrical wall, an upper edge of which is crimped onto the priming system.
- the support may consist of a cup having a bottom wall secured to the cylindrical wall and disposed in abutment on an upper face of the grenade body.
- the cup will present for example at least two holes allowing the passage of rods integral with the grenade body.
- the cup can be made integral with the rods by welding.
- the support may consist of a tube which is fixed by welding at an external wall of the body.
- the external wall on which the tube will be fixed may include a shoulder constituting a stop for the tube.
- the external wall on which the tube is fixed may be rounded, the end of the tube then having a flared part and a chamfer.
- the subject of the invention is also a method of fixing a priming system on a body of a grenade, a method characterized by the following steps:
- the tube portion is fixed by welding to the grenade body
- the priming system is placed inside the tube, - the tube is crimped onto the priming system.
- Another subject of the invention is another method of attaching a priming system to a body of a grenade, a method characterized by the following steps: -a portion of a metal tube is cut,
- a flange forming a crimping stop is produced at one end of the tube, before placing it around a priming system or after having placed it around the priming system,
- the tube portion is fixed by welding to the grenade body.
- the part of the grenade body on which the tube is applied is rounded, there will be a slight flaring of the end of the front tube or when positioning the tube on the grenade body, this in order to widen the relative contact surface between the tube and the grenade body.
- Welding can be performed by laser.
- Laser welding can be performed so as to cut one end of the tube so as to provide an end chamfer at this end of the tube.
- FIG. 2 represents a first embodiment of a fixing device according to the invention
- FIG. 3 represents a second embodiment of a fixing device according to the invention
- FIG. 4 shows the different stages of the fixing method according to the invention
- FIG. 5a and 5b are two detail views of two alternative embodiments of the welding of the tube on the grenade body.
- Figure 1 shows a grenade 1 of known type (as described for example by US Pat. No. 3,913,483.
- a metallic body 2 which contains an explosive charge 3 on which a metallic coating 4 is applied which is substantially conical.
- a priming system 5, of a known type and of which only the external profile is shown here, is fixed to the body 2 of the grenade by a fixing device which comprises four rivets 6 regularly distributed angularly (here only two rivets are visible ).
- the rivets 6 pass through an upper face 7 of the grenade body 2 through holes 8.
- the head 6a of the rivets is embedded in the explosive charge 3.
- the deformable tail 6b of the rivets 6 is applied to the priming system 5.
- the shanks 6b of the rivets must first be cut to remove the priming system 5.
- the shortened rivets are then difficult to use for fixing another priming system.
- the geometry of the latter must be adapted to allow cooperation with the rivets.
- FIG. 2 shows a first embodiment of a fixing device according to the invention.
- the priming system 5 is made integral with the body 2 of the grenade by means of a metallic support 9 comprising a thin cylindrical wall 10, an upper edge 11 of which is crimped onto the priming system 5 .
- the support 9 consists of a cup having a bottom wall 12 secured to the cylindrical wall 10 and disposed in abutment on the upper face 7 of the body 2 of the grenade.
- the cup 9 will be made for example from stamped sheet steel 1 mm thick. It has holes 13 allowing the passage of the rods of the rivets 6 secured to the body 2 of the grenade.
- the cup 9 and the body 2 will be secured together by crimping the ends 6b of the rivets 6 on the cup 9 (see the right rivet in FIG. 2).
- the rivets 6 will have been cut beforehand to an appropriate length allowing crimping on the thin cup 9.
- the thickness of the cup is of the order of 1 mm, it is therefore easy to shorten the rivets usually encountered (which have a length of the order of 10 mm) so as to give them an appropriate dimension for crimping. It is however necessary to provide in the priming system 5 a clearance 14 avoiding any interference with the tails 6b of the rivets.
- the rivets 6 can be cut so that their end is flush with the interior of the cup 9. We will then fix the cup 9 by welding, for example by laser, the ends of the rivets on the cup.
- the laser welding will be carried out by causing the cup and the rivet to heat up along the circular contact line of the rivet 6 with the hole 13 in the cup 9.
- the fixing device according to the invention can replace a priming system such as that according to Figure 1 by another priming system.
- the rivets are reused without the need to remove the explosive from the grenade body.
- the cup allows the attachment of a priming system, of any shape and structure, on the body of the grenade. It also makes it easy to fix a priming system, the structure of which will be made in materials very different from those of the grenade body, for example plastic or zinc / aluminum alloy (alloys well known under the brand zamak).
- the device according to the invention can also be used for a new grenade. It will authorize a subsequent replacement of the boot system by another system. It will suffice to proceed with the desoldering of the rim 11 of the cup to dismantle the priming system. A new system can be replaced and the cup will be refilled.
- Figure 3 shows a second embodiment of a fixing device according to the invention.
- the support 9 is constituted by a tube which is fixed by welding at an external wall of the body 2.
- FIG. 5b shows in an enlarged manner the end of the tube 9 which is welded to the body 2.
- the external wall 15 of the body 2 on which the tube 9 is fixed is rounded.
- the end of the tube 9 has a flared part 16 and a chamfer 17.
- the flaring 16 of the tube 9 will be carried out using an appropriate tool, for example a mandrel having the desired shape and on which the tube will be applied with a sufficient compression force allowing the plastic deformation of the tube.
- the flaring may possibly be carried out directly on the body 2 of the grenade.
- the weld between the tube 9 and the body 2 will be a laser weld produced according to a circular crown and with an orientation R of the radiation such that it cuts the end of the tube 9 so as to produce both the weld and the end chamfer 17.
- the chamfer makes it possible to avoid excess thickness at sharp angles on the body which would risk causing the tube 9 to be torn off when the grenades are dispersed out of their carrier (shell or rocket).
- the external wall of the grenade body 2 has a shoulder 18 which constitutes a stop allowing axial positioning of the tube 9.
- the tube is fixed to the body for example by laser welding. along a circular crown and with an orientation R substantially perpendicular to the tube and to the external wall of the body 2 of the grenade.
- the priming system 5 is positioned inside the tube 9 and the upper flange 11 is crimped onto the priming system 5.
- Figure 4 summarizes the different steps of the method according to the invention allowing the attachment of a priming system on a body of a grenade.
- a portion 9 is cut from a metal tube, for example made of steel 1 mm thick.
- this portion of tube 9 is capped with part of an external surface of a body 2 of the grenade and the portion of tube 9 is fixed by welding R to the body 2 of the grenade.
- the welding will preferably be a laser welding.
- step C the priming system 5 is placed inside the tube 9.
- tube D the tube 9 is crimped onto the priming system 5.
- the tube 9 may be given its final length from step A or else the tube may be cut to its final length after it has been welded to the body (step B).
- step A it will be possible after step A to go to a step E during which a collar forming a crimping stop 11 will be produced at one end of the tube 9.
- This collar may be produced as shown here after placing the tube around the priming system 5.
- a support tool 19 will be provided which will include a cylindrical part receiving the tube 9 and having a height corresponding to that of the part of the grenade body which will subsequently receive the tube 9.
- this flange 11 can be produced using an appropriate tool separate from the priming system.
- step F a part of an external surface of the grenade body 2 is capped with the tube 9 carrying the priming system 5 and the portion of tube 9 is fixed by welding R to the grenade body 2.
- the welding will again be a laser welding.
- the methods proposed by the invention can be used to manufacture new grenades.
- the bodies 2 of grenades will be prepared by separating from them the old priming system, for example by cutting the fixing rivets.
- the next step is to fix the new priming system using one or other of the methods according to the invention.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Laser Beam Processing (AREA)
- Tents Or Canopies (AREA)
- Body Structure For Vehicles (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Steering Devices For Bicycles And Motorcycles (AREA)
- External Artificial Organs (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Catching Or Destruction (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60022468T DE60022468T2 (de) | 1999-10-18 | 2000-10-10 | Vorrichtung und verfahren zum befestigen von einem zünder auf einer geschosshülle |
EP00967983A EP1141652B1 (fr) | 1999-10-18 | 2000-10-10 | Dispositif et procede de fixation d'un systeme d'amor age sur un corps d'une grenade |
IL14226400A IL142264A0 (en) | 1999-10-18 | 2000-10-10 | Device and process to attach a priming system to the body of a grenade |
AT00967983T ATE304158T1 (de) | 1999-10-18 | 2000-10-10 | Vorrichtung und verfahren zum befestigen von einem zünder auf einer geschosshülle |
US09/806,227 US6474240B1 (en) | 1999-10-18 | 2000-10-10 | Device and process to attach a priming system to the body of a grenade |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR99/13060 | 1999-10-18 | ||
FR9913060A FR2799830B1 (fr) | 1999-10-18 | 1999-10-18 | Dispositif et procede de fixation d'un systeme d'amorcage sur un corps d'une grenade |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001029498A1 true WO2001029498A1 (fr) | 2001-04-26 |
Family
ID=9551122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/002800 WO2001029498A1 (fr) | 1999-10-18 | 2000-10-10 | Dispositif et procede de fixation d'un systeme d'amorçage sur un corps d'une grenade |
Country Status (10)
Country | Link |
---|---|
US (1) | US6474240B1 (fr) |
EP (1) | EP1141652B1 (fr) |
AT (1) | ATE304158T1 (fr) |
DE (1) | DE60022468T2 (fr) |
DK (1) | DK1141652T3 (fr) |
ES (1) | ES2248130T3 (fr) |
FR (1) | FR2799830B1 (fr) |
IL (1) | IL142264A0 (fr) |
WO (1) | WO2001029498A1 (fr) |
ZA (1) | ZA200103665B (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070135686A1 (en) * | 2005-12-14 | 2007-06-14 | Pruitt John C Jr | Tools and methods for epicardial access |
DE102007056786A1 (de) * | 2007-11-23 | 2009-05-28 | Rheinmetall Waffe Munition Gmbh | Geschoss |
DE102007056785A1 (de) * | 2007-11-23 | 2009-05-28 | Rheinmetall Waffe Munition Gmbh | Geschoss |
EP2199730B1 (fr) * | 2008-12-18 | 2012-04-18 | Rheinmetall Waffe Munition ARGES GmbH | Grenades à main |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB578775A (en) * | 1942-11-04 | 1946-07-11 | James Taylor | Improvements in or relating to high explosive projectiles or missiles for use against armour plate and the like |
US3926122A (en) * | 1972-08-11 | 1975-12-16 | Us Army | Grenade with fuze (U) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2562928A (en) * | 1945-10-10 | 1951-08-07 | Lewis Bernard | Grenade |
US2696191A (en) * | 1951-10-17 | 1954-12-07 | William E Sheehan | Electrically operated primer |
US3191533A (en) * | 1963-01-23 | 1965-06-29 | Jet Res Ct Inc | Gas discharge apparatus |
US3705552A (en) * | 1971-02-08 | 1972-12-12 | Us Army | Pyrotechnic coiled delay cord assembly for hand grenade fuze |
US3913483A (en) | 1972-08-11 | 1975-10-21 | Us Army | Grenade with fuze |
US4014263A (en) * | 1976-02-23 | 1977-03-29 | The United States Of America As Represented By The Secretary Of The Army | Caseless projectile |
RO95583B (ro) * | 1984-12-21 | 1988-10-01 | Brascomb Corporation N.V. | Cartus exploziv de impact |
US4662278A (en) * | 1985-03-18 | 1987-05-05 | Lillios William N | Fuse assembly |
USH136H (en) * | 1985-10-23 | 1986-10-07 | The United States Of America As Represented By The Secretary Of The Army | Electrically detonated grenade |
DE3925235A1 (de) * | 1989-07-29 | 1991-01-31 | Rheinmetall Gmbh | Bombletzuender |
FR2686688B1 (fr) * | 1992-01-29 | 1995-07-07 | Ruggieri | Bouchon allumeur. |
US5485790A (en) * | 1993-05-28 | 1996-01-23 | Oea, Inc. | Gas generator with multiple-charge primer |
US5355801A (en) * | 1993-06-21 | 1994-10-18 | Donahue William J | Small caliber fuze with arming delay, second impact and graze sensitivity |
-
1999
- 1999-10-18 FR FR9913060A patent/FR2799830B1/fr not_active Expired - Fee Related
-
2000
- 2000-10-10 ES ES00967983T patent/ES2248130T3/es not_active Expired - Lifetime
- 2000-10-10 WO PCT/FR2000/002800 patent/WO2001029498A1/fr active IP Right Grant
- 2000-10-10 DE DE60022468T patent/DE60022468T2/de not_active Expired - Fee Related
- 2000-10-10 AT AT00967983T patent/ATE304158T1/de not_active IP Right Cessation
- 2000-10-10 DK DK00967983T patent/DK1141652T3/da active
- 2000-10-10 IL IL14226400A patent/IL142264A0/xx unknown
- 2000-10-10 US US09/806,227 patent/US6474240B1/en not_active Expired - Fee Related
- 2000-10-10 EP EP00967983A patent/EP1141652B1/fr not_active Expired - Lifetime
-
2001
- 2001-05-07 ZA ZA200103665A patent/ZA200103665B/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB578775A (en) * | 1942-11-04 | 1946-07-11 | James Taylor | Improvements in or relating to high explosive projectiles or missiles for use against armour plate and the like |
US3926122A (en) * | 1972-08-11 | 1975-12-16 | Us Army | Grenade with fuze (U) |
Also Published As
Publication number | Publication date |
---|---|
FR2799830B1 (fr) | 2002-08-30 |
IL142264A0 (en) | 2002-03-10 |
ATE304158T1 (de) | 2005-09-15 |
EP1141652A1 (fr) | 2001-10-10 |
ZA200103665B (en) | 2002-05-02 |
EP1141652B1 (fr) | 2005-09-07 |
DK1141652T3 (da) | 2006-01-09 |
US6474240B1 (en) | 2002-11-05 |
DE60022468T2 (de) | 2006-06-14 |
ES2248130T3 (es) | 2006-03-16 |
FR2799830A1 (fr) | 2001-04-20 |
DE60022468D1 (de) | 2005-10-13 |
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