EP0794848A1 - Process and device for chopping a body of solid explosives, especially composite rocket fuels - Google Patents
Process and device for chopping a body of solid explosives, especially composite rocket fuelsInfo
- Publication number
- EP0794848A1 EP0794848A1 EP95935948A EP95935948A EP0794848A1 EP 0794848 A1 EP0794848 A1 EP 0794848A1 EP 95935948 A EP95935948 A EP 95935948A EP 95935948 A EP95935948 A EP 95935948A EP 0794848 A1 EP0794848 A1 EP 0794848A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- composite rocket
- rocket fuel
- water jet
- pressure water
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
- F42B33/06—Dismantling fuzes, cartridges, projectiles, missiles, rockets or bombs
- F42B33/062—Dismantling fuzes, cartridges, projectiles, missiles, rockets or bombs by high-pressure water jet means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
- B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
- B26D7/02—Means for holding or positioning work with clamping means
-
- 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
- B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0091—Elimination of undesirable or temporary components of an intermediate or finished product, e.g. making porous or low density products, purifying, stabilising, drying; Deactivating; Reclaiming
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
- F42B33/008—Cutting explosive or propulsive charges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
- B26D2007/013—Means for holding or positioning work the work being tubes, rods or logs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/04—Processes
- Y10T83/0591—Cutting by direct application of fluent pressure to work
Definitions
- Solid explosive bodies in particular
- the invention relates to a method with a device for cutting a body from solid explosives.
- Solid explosives are used in relatively large quantities or quantities in solid rockets and all types of engines, such as surface-to-air, surface-to-surface and air-to-air missiles. Such large numbers of such rockets and engines are located in storage facilities and are to be subjected to delaborating, recycling or destruction. This requires safe, ecologically clean and efficient technologies.
- the composite fuels used for solid rockets have a high proportion of 60 to 80% of an oxygen carrier and aluminum in powder form in a range of 5 to 10%. Ammonium perchlorate, potassium perchlorate or Aj- ⁇ monium nitrate are generally used as oxygen carriers.
- ammonium chlorate (NH 4 C10 4 ) at 240 ° C releases chlorine as a strong respiratory poison and oxygen to support combustion.
- solid fuels have the problem that they have the ability to become statically charged when they are processed. The static charges can lead to voltages of up to 1000 V. The inevitably occurring electrical discharges can be fixed because of their short life Do not ignite the fuel, but can ignite the powder dust which arises during, for example, dry machining, such as sawing, grinding, etc., which in turn can lead to ignition of the solid fuel. Solid rocket fuels also have a high sensitivity to impact and friction.
- a method for cutting a body from solid explosives in particular composite rocket fuels.
- a high-pressure water jet emerging from a nozzle is directed at the body made of solid explosive, the nozzle and the body made of solid explosive simultaneously executing a relative movement to one another during cutting.
- the use of a high-pressure water jet as a cutting tool effectively avoids the dangerous thermal effects which occur in other mechanical separation processes, for example by the thermal energy generated during cutting is dissipated with the water acting as a coolant.
- Another important advantage is that the process can be carried out under ambient pressure conditions and at the same time an unintended ignition of the solid fuel can be prevented.
- the method for cutting solid explosive bodies is applied to a composite rocket fuel body.
- a composite rocket fuel body To increase the speed of cutting solid composite rocket bodies.
- Fuel existing body grinding particles are added to the high pressure water jet.
- the cutting feed motion can be accomplished either by fixing the position of the nozzle and moving the body made of composite rocket fuel, by moving the nozzle and fixing the body, or by moving both the body and the nozzle.
- a cutting feed movement takes place about at least two axes in order to be able to achieve curved or inclined cutting surfaces.
- the high-pressure water jet emerges from the nozzle at a pressure in the range from 30 to 120 MPa.
- this can be done by high-pressure water jet cutting inside the casing between the inner surface of the casing and the outer surface of the composite rocket fuel in order to make the body of composite Peel rocket fuel out of the casing. It can be peeled out without separating the fuel body and the casing, because there is a binder between the body and the casing.
- the cutting feed movements of the nozzle and / or body made of composite rocket fuel and selected parameters of the high-pressure water jet, such as, for example, outlet pressure, can be carried out in yet another preferred exemplary embodiment.
- Beam diameter, beam focusing, proportion of abrasive particles in the high pressure water jet, etc. can be controlled remotely.
- the device is designed in such a way that the body made of composite rocket fuel can be portioned into smaller parts using the high-pressure water jet in various vertical, horizontal, inclined or curved surfaces.
- the body is fixed in position on the cutting table, i.e. either clamped with a fastening device if it is a smaller body, or arranged resting on the cutting table if it is a larger body, and the nozzle holder is movably arranged, the nozzle holder being displaceable or pivotable or displaceable and is pivotable.
- the components of the device which carry out the cutting feed movements and the variables influencing the parameters of the high-pressure water jet can be remotely controlled.
- abrasive materials are added to the high-pressure water jet to increase the cutting speed, the water then serving as a carrier for the abrasive materials, a nozzle made of wear-resistant material is used to increase their service life.
- Fig. La is a side view with the body to be cut open on the cutting table with a nozzle holder displaceably arranged on a frame;
- Fig. Lb is a plan view of the arrangement of Fig. La);
- Fig. 2a an end view of a mounted on drive rollers
- Fig. 2b is a side longitudinal view of the arrangement of Fig. 2a).
- a side view of a cutting table 5 is shown with a body 1 made of composite rocket fuel spanned by means of straps 3, which is a body 1 of relatively small fuel mass.
- a guide frame 13 is arranged on each longitudinal side, which is spanned by a carrier 15, on which the nozzle holder 6 is displaceably arranged with the nozzle 7 for the high-pressure water jet 2, the carrier 15 in longitudinal direction of the body 1 made of composite rocket fuel is displaceable.
- the carrier 15 for fastening the displaceable nozzle holder 6 for the nozzle 7 is shown in FIG. 1b).
- nozzle holder 6 by a first drive device, which is for example a stepper motor controlled by an associated control device, both on the carrier in the transverse direction to the guide frame 13 and with the carrier in the longitudinal direction on the guide frame 13 by a second drive device is arranged, cuts can be made both in the transverse direction of the body 1 made of composite rocket fuel and in its longitudinal direction parallel to the longitudinal axis or by simultaneous movement of the nozzle holder 6 on the carrier 15 and on the guide frame 13 in inclined surfaces.
- the monolithic body 1 made of composite rocket fuel can be portioned into any size units.
- FIG. 2a shows a side end view of a body 8 made of a composite rocket fuel of greater mass, which is mounted on two rollers extending in the longitudinal direction and driven by a second drive device 9 at its lower region, the Body 8 is in an envelope, which is preferably made of metal and extends over the longitudinal extent of the body 8.
- the second drive device 9 causes the body 8 with the metallic casing 10 to rotate about its longitudinal axis.
- the nozzle holder 6 with the nozzle 7 for the high-pressure water jet 2 is arranged in such a way that the water jet strikes a region of the end face 11 of the body 8 according to FIG. 2b) which is annular between the inside of the metallic casing 10 and the outside of the body 8 made of composite rocket fuel.
- the body 8 By fixing the fixed nozzle 6 to the frame 14 of the cutting table 5, the body 8 can be peeled out of the metallic casing 10 with the high-pressure water jet and can thus be supplied to a later portioning in a suitable manner.
- a binder is provided in the area between the outer cylindrical surface of the body 8 and the inner surface of the metallic casing 10, so that when the high-pressure water jet 2 is directed into the intermediate area 12 formed by the binder, neither the metal jacket 10 nor the composite rocket fuel 1 are cut .
- the tangential longitudinal cut enables the casing 10 to be separated without cutting the composite rocket fuel 1.
- the separation energy introduced with the high-pressure water jet 2 being dissipated, so that a risk from unintentional ignition of the rocket fuel can be eliminated or greatly reduced.
- the device for carrying out the method according to the invention can be remotely controlled and the method can be used even under normal ambient pressure conditions to produce large portions of the composite rocket fuel.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Disintegrating Or Milling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4440208A DE4440208A1 (en) | 1994-11-10 | 1994-11-10 | Method and device for cutting a body from solid explosives, in particular composite rocket fuels |
DE4440208 | 1994-11-10 | ||
PCT/EP1995/004104 WO1996014961A1 (en) | 1994-11-10 | 1995-10-19 | Process and device for chopping a body of solid explosives, especially composite rocket fuels |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0794848A1 true EP0794848A1 (en) | 1997-09-17 |
EP0794848B1 EP0794848B1 (en) | 1999-08-04 |
Family
ID=6532997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95935948A Expired - Lifetime EP0794848B1 (en) | 1994-11-10 | 1995-10-19 | Process and device for chopping a body of solid explosives, especially composite rocket fuels |
Country Status (5)
Country | Link |
---|---|
US (1) | US5941466A (en) |
EP (1) | EP0794848B1 (en) |
DE (2) | DE4440208A1 (en) |
IL (1) | IL115926A (en) |
WO (1) | WO1996014961A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9715014D0 (en) * | 1997-07-18 | 1997-09-24 | Secr Defence | Two phase cutting device |
GB2359775A (en) * | 2000-02-25 | 2001-09-05 | Disarmco Ltd | Apparatus for cutting holes in munitions |
US6615695B1 (en) * | 2000-06-27 | 2003-09-09 | Medtronic, Inc. | Alternative fabrication method for spiral electrodes |
US6899007B1 (en) * | 2002-04-10 | 2005-05-31 | George R. Blankenship | Self-contained mobile chassis for bomb deactivation |
US7328643B2 (en) * | 2003-05-23 | 2008-02-12 | Gradient Technology | Process for accessing munitions using fluid jet technology |
FR2857357B1 (en) * | 2003-07-10 | 2005-08-19 | Snpe Materiaux Energetiques | METHOD AND INSTALLATION FOR DESTRUCTION OF SOLID PROPERGOL ENGINES |
DE102004034784B4 (en) * | 2004-07-09 | 2009-08-27 | Spreewerk Lübben GmbH | Process and device for the decommissioning of explosive-containing bodies |
FR2882534B1 (en) * | 2005-02-28 | 2008-09-26 | Philippe Crelier | METHOD FOR SIMULTANEOUSLY CUTTING HETEROGENEOUS MATERIALS AND ITS DEVICE FOR IMPLEMENTING THE SAME |
US7947047B2 (en) * | 2005-06-20 | 2011-05-24 | Ams Research Corporation | Medical screwdrivers and methods |
CN102873412A (en) * | 2012-10-11 | 2013-01-16 | 南京工艺装备制造有限公司 | Method for processing lead screw roller path by using water jet cutter |
DE102015221273A1 (en) * | 2015-10-30 | 2017-05-04 | Siemens Aktiengesellschaft | Water jet cutting process, water jet cutting machine and workpiece holder |
CN110948552A (en) * | 2019-12-21 | 2020-04-03 | 武汉亚联塑业有限公司 | PVC pipe cutting device |
FR3123242B1 (en) * | 2021-05-31 | 2023-06-02 | Arianegroup Sas | NON-OUTLET CUTTING PROCESS BY HIGH PRESSURE JET FOR A LOADED THRUSTER BODY |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2092083A (en) * | 1937-01-21 | 1937-09-07 | Liberty Mirror Works | Apparatus for cutting openings by abrasion |
US4793866A (en) * | 1985-12-13 | 1988-12-27 | Morton Thiokol, Inc. | Method and apparatus for removing solid propellant from rocket motor cases |
US5001870A (en) * | 1987-10-05 | 1991-03-26 | Kajima Corporation | Method of cutting and disassembling cylindrical structure |
DE8807176U1 (en) * | 1988-03-08 | 1988-07-28 | Horst Witte Entwicklungs- und Vertriebs KG, 2122 Bleckede | Clamping device for workpieces |
DE3913479C1 (en) * | 1989-04-24 | 1990-08-23 | Dr. Ing. Koehler Gmbh Ingenieurbuero, 3150 Peine, De | Disarming toxic and/or explosive objects - involves dismantling based on investigation on measuring after transport in plastics jacket |
US5025632A (en) * | 1989-06-13 | 1991-06-25 | General Atomics | Method and apparatus for cryogenic removal of solid materials |
DE4128703A1 (en) * | 1991-08-29 | 1993-03-04 | Dietmar Dr Ing Rath | Universal deactivating method for munitions and explosives - using high pressure liq. jets, useful for munitions, discovered in decomposed state |
CA2090371A1 (en) * | 1992-03-27 | 1993-09-28 | William Frank Banholzer | Water jet mixing tubes used in water jet cutting devices and method of preparation thereof |
US5363603A (en) * | 1992-06-22 | 1994-11-15 | Alliant Techsystems, Inc. | Abrasive fluid jet cutting compositon and method |
DE4221666C1 (en) * | 1992-07-02 | 1994-01-27 | Alba Ind & Umweltschutzservice | Method for opening bodies contg. explosive material - uses compressed water jet with integrated mineral and/or metal grinding particles |
JPH06320426A (en) * | 1992-10-17 | 1994-11-22 | Saechsische Werkzeug & Sondermas Gmbh | Liquid and abrasive particle feeder for fluid jet blast type cutting device |
-
1994
- 1994-11-10 DE DE4440208A patent/DE4440208A1/en not_active Ceased
-
1995
- 1995-10-19 US US08/836,432 patent/US5941466A/en not_active Expired - Fee Related
- 1995-10-19 EP EP95935948A patent/EP0794848B1/en not_active Expired - Lifetime
- 1995-10-19 WO PCT/EP1995/004104 patent/WO1996014961A1/en active IP Right Grant
- 1995-10-19 DE DE59506547T patent/DE59506547D1/en not_active Expired - Fee Related
- 1995-11-09 IL IL11592695A patent/IL115926A/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9614961A1 * |
Also Published As
Publication number | Publication date |
---|---|
IL115926A (en) | 1999-12-22 |
IL115926A0 (en) | 1996-01-31 |
EP0794848B1 (en) | 1999-08-04 |
DE4440208A1 (en) | 1996-05-15 |
WO1996014961A1 (en) | 1996-05-23 |
US5941466A (en) | 1999-08-24 |
DE59506547D1 (en) | 1999-09-09 |
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