• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method of providing a high-explosive projectile with desired areas of fragmentation includes the following steps: securing a steel plate component in a circumferentially extending recess in the outer surface of a projectile body; directing an energy beam to outer surface portions of the steel plate component; heating, by the energy beam, narrow zones to a temperature above the melting temperature of the steel plate component to a predetermined depth thereof; and cooling the heated zones for effecting structural metallurgical changes in the steel plate component for obtaining the desired areas of fragmentation.
    公开号:US20010004868A1
    申请号:US09/735,615
    申请日:2000-12-14
    公开日:2001-06-28
    发明作者:Helmut Burckhardt；Walter Simon；Thomas Heitmann
    申请人:Rheinmetall W&M GmbH；
    IPC主号:F42B12-24
    专利说明:
    [0001] This application claims the priority of German Application No. 199 60 180.1 filed Dec. 14, 1999, which is incorporated herein by reference. [0001] BACKGROUND OF THE INVENTION
    [0002] This invention relates to a method of making a high-explosive projectile having a projectile body which, by means of a thermal post-treatment, is provided with desired fragmentation areas in a portion of its outer surface. [0002]
    [0003] High-explosive projectiles of the above-outlined type are described, for example, in German Patent No. 21 26 351 to which corresponds British Patent No. 1,503,143 and German Offenlegungsschrift (application published without examination) No. 28 37 638, to which corresponds British Patent No. 2,013,842. For improving the fragmentation effect in these known high-explosive projectiles, the desired fragmentation areas are provided directly on the projectile body which, as a rule, is a one-part component. For this purpose, for example, small regions of the projectile body are melted by laser or electron beams and are subsequently cooled in such a manner that metallurgical structural changes (generally narrow martensite zones) are formed, along which the projectile subsequently breaks apart. The above-outlined conventional method is disadvantageous, because by virtue of the substantial heating and cooling of outer surface regions of the projectile body, underlying deeper regions of the projectile body may also be thermally affected, as a result of which a sufficient firing stability of the projectile body and thus the entire high-explosive projectile is frequently not ensured. [0003] SUMMARY OF THE INVENTION
    [0004] It is an object of the invention to provide an improved, simple method of providing a projectile body with desired fragmentation areas by heat treatment without adversely affecting the firing stability of the projectile. [0004]
    [0005] This object and others to become apparent as the specification progresses, are accomplished by the invention, according to which, briefly stated, the method of providing a high-explosive projectile with desired areas of fragmentation includes the following steps: securing a steel plate component in a circumferentially extending recess on the outer surface of a projectile body; directing an energy beam to outer surface portions of the steel plate component; heating, by the energy beam, narrow zones to a temperature above the melting temperature of the steel plate component to a predetermined depth thereof; and cooling the heated zones for effecting structural metallurgical changes in the steel plate component for obtaining the desired areas of fragmentation. [0005]
    [0006] The invention is based essentially on the principle to provide the desired fragmentation areas not directly on the projectile body as it has been done conventionally, but on a separate, shell-like steel plate component located in a suitable recess of the projectile body. [0006]
    [0007] The invention ensures that in addition to securely avoiding a thermal effect on the projectile body, the region of the high-explosive projectile provided with desired fragmentation areas is, upon acceleration of the projectile in the weapon barrel, exposed to significantly lesser stress than the projectile body. This is so because the radial force introduction upon passage of the projectile through the weapon barrel occurs through the ductile projectile body and not through the brittle fragmentation plate or plates. The inner pressure generated by the acceleration of the explosive too, exerts its force solely to the ductile projectile body rather than to the fragmentation shell. The fragmentation plate therefore essentially needs only to support itself. [0007]
    [0008] According to a preferred embodiment of the invention, two curved steel plate portions are inserted in a circumferential recess of the projectile body in such a manner that the steel plate portions circumferentially adjoin one another. Then the steel plate portions are first temporarily secured to the projectile body. The permanent securement of the two steel plate portions is thereafter effected by welding the steel plate portions together as areas of the latter are melted to render those areas brittle. In case the steel plate component is a one-piece tube rather than a longitudinally multi-part member, it has to be connected to the projectile body by suitable securing and/or supporting elements. [0008]
    [0009] It has been found to be advantageous to guide the laser or electron beams required for the local melting of the steel plate component in such a manner that the structural changes extend helically or have a helical crisscross pattern. The generation of helically extending spiral structural changes performed on a projectile body is described, for example, in U.S. Pat. No. 3,783,790. [0009] BRIEF DESCRIPTION OF THE DRAWINGS
    [0010] FIG. 1 shows schematically a sectionally illustrated high-explosive projectile during a zonewise welding of steel plate component parts positioned in a receiving recess provided circumferentially in the projectile body to produce defined structural changes. [0010]
    [0011] FIG. 2 is a sectional view taken along line II-II of FIG. 1. [0011]
    [0012] FIG. 3 is a fragmentary top plan view of a projectile region having structural changes provided with a method according to the invention. [0012] DESCRIPTION OF THE PREFERRED EMBODIMENTS
    [0013] FIG. 1 shows a high-explosive projectile [0013] 1 having a projectile body 2, depicted prior to the insertion of the explosive charge. The projectile body 2 has, on its outer surface, an annularly surrounding depression or recess 3 in which two curved steel plate parts 4 and 5 are accommodated and temporarily secured. As shown in FIG. 2, the steel plate parts 4, 5 are in mutual contact along their axially extending edges 6, 7 and, respectively 8, 9.
    [0014] A laser beam generating device [0014] 10 generates a powerful laser beam 11 which is directed by a pivotal mirror 12 to the upper surface 13 of the steel plate parts 4, 5 which are thus heated zonewise to a temperature which is above the melting temperature of steel. The melting depth of the steel plate parts 4, 5 should not exceed 75% of the wall thickness of the steel plate parts to securely avoid a temperature effect on the material of the projectile body 2.
    [0015] Since the projectile [0015] 1 is rotated in a holding device (not illustrated for the sake of clarity) as the mirror 12 executes an oscillating motion as indicated by the arrow A, the heat-treated, narrow, line-like area of the parts 4, 5 has a spiral course. Such area is first melted and, due to the rapid, subsequent cooling, undergoes a structural change characterized by embrittlement. An additional similar heat treatment with a changed guidance of the laser beam results in a crisscross spiral structural modification so that diamond-shaped surfaces with brittle zones (desired fragmentation locations) 14 are obtained as shown in FIG. 4.
    [0016] To obtain regions with a high degree of embrittlement, the material of the steel plate parts [0016] 4, 5 has preferably a high carbon content to obtain a possibly large number of martensite structures in the weld zone.
    [0017] During the welding process, the steel plate parts [0017] 4, 5 are connected to one another along their axially extending edges 6, 7 and, respectively, 8, 9, for example, by means of overlapping, subsequently applied longitudinal seams. The temporary securement of the steel plate parts 4, 5 to the projectile body 2 may subsequently be removed.
    [0018] It is to be understood that the invention is not limited to the above-described embodiment. Rather, the structural changes, dependent upon the guidance of the laser beam, may have rectangular, quadratic, hexagonal or circular shape rather than the described diamond shape. [0018]
    [0019] Further, instead of a laser beam, an electron beam may be utilized as a heat source for the zonewise melting of the steel plate parts. In such a case the heat-treating method is preferably performed in vacuum so that a sufficiently coherent electron beam is obtained for producing narrow melting zones. [0019]
    [0020] It will be understood that the above description of the present invention is susceptible to various modifications, changes and adaptations, and the same are intended to be comprehended within the meaning and range of equivalents of the appended claims. [0020]
    权利要求:
    Claims (8)
    [1" id="US-20010004868-A1-CLM-00001] 1. A method of providing a high-explosive projectile with desired areas of fragmentation, comprising the following steps:
    (a) securing a steel plate component in a circumferentially extending recess in an outer surface of a projectile body;
    (b) directing an energy beam to outer surface portions of said steel plate component;
    (c) heating, by the energy beam, narrow zones of said steel plate component to a temperature above the melting temperature of the steel plate component to a predetermined depth thereof; and
    (d) cooling the heated zones for effecting structural metallurgical changes in the steel plate component for obtaining said desired areas of fragmentation.
    [2" id="US-20010004868-A1-CLM-00002] 2. The method as defined in
    claim 1 , wherein step (a) comprises the step of securing two longitudinal half-tube steel plate parts, constituting said steel plate component, in said recess of the projectile body such that respective longitudinal edges of said longitudinal half-tube steel plate parts adjoin one another.
    [3" id="US-20010004868-A1-CLM-00003] 3. The method as defined in
    claim 2 , wherein step (c) comprises the step of heating the adjoining longitudinal edges of said longitudinal half-tube steel plate parts such that said edges melt and overlap, whereby during step (c) the adjoining edges are welded to one another.
    [4" id="US-20010004868-A1-CLM-00004] 4. The method as defined in
    claim 1 , wherein steps (b) and (c) are performed by a laser beam.
    [5" id="US-20010004868-A1-CLM-00005] 5. The method as defined in
    claim 1 , wherein steps (b) and (c) are performed by an electron beam.
    [6" id="US-20010004868-A1-CLM-00006] 6. The method as defined in
    claim 1 , wherein step (b) comprises the step of directing the energy beam to said steel plate component in a helical path.
    [7" id="US-20010004868-A1-CLM-00007] 7. The method as defined in
    claim 1 , wherein step (b) comprises the step of directing the energy beam to said steel plate component in a plurality of crisscrossing helical paths.
    [8" id="US-20010004868-A1-CLM-00008] 8. The method as defined in
    claim 1 , wherein said predetermined depth is at the most 75% of a wall thickness of said steel plate component.
    类似技术:
    公开号 | 公开日 | 专利标题
    US6502515B2|2003-01-07|Method of making a high-explosive projectile
    JP5912659B2|2016-04-27|Turbine rotor
    US7022940B2|2006-04-04|Combustor linear and method for making thereof
    US5211327A|1993-05-18|Method of welding
    EP0892218A1|1999-01-20|Gas turbine multi-hole film cooled combustor liner and method of manufacture
    US3807014A|1974-04-30|Method of manufacturing pistons
    JP4495199B2|2010-06-30|Turbine rotor and rotor manufacturing method
    JP5573295B2|2014-08-20|Manufacturing method of turbine rotor
    KR20180125545A|2018-11-23|Laser welding of steel with output modulation to prevent high temperature cracking
    US7020962B2|2006-04-04|Method for producing a cam for a camshaft
    US8006385B2|2011-08-30|Forming method of tooth trace of gear
    CN107921584A|2018-04-17|Method for laser welding
    CN107206542B|2020-03-03|Method for joining a turbocharger turbine wheel to a shaft and resulting assembly
    US3384356A|1968-05-21|Tire fastening for a rotary shell
    US4485866A|1984-12-04|Heat absorber structure, particularly a plasma beam absorber
    USH238H|1987-03-03|Warhead casing of novel fragmentation design
    US4914268A|1990-04-03|Beam welding process
    RU2708724C1|2019-12-11|Method of electron-beam welding of annular connection of thin-wall shell with cylindrical cover, made of high-strength aluminum alloys
    US6892687B2|2005-05-17|Camshaft and a method and a device for producing the same
    US3506251A|1970-04-14|Apparatus for the integrated welding and heat treating of hardenable parts
    US3482296A|1969-12-09|Method for the integrated welding and heat treating of hardenable parts
    CA1048793A|1979-02-20|Heavy-duty offshore stud chain link
    JP2004298478A|2004-10-28|Golf club head and manufacturing method therefor
    US20210260699A1|2021-08-26|Butt welded joint of steel material and method for manufacturing same
    JP2957304B2|1999-10-04|Welding method of galvanized steel sheet
    同族专利:
    公开号 | 公开日
    US6502515B2|2003-01-07|
    DE19960180A1|2001-06-28|
    DE19960180B4|2006-03-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20050235862A1|2004-04-22|2005-10-27|Lockheed Martin Corporation|Warhead with integral, direct-manufactured features|
    US20140230682A1|2012-06-01|2014-08-21|ATK Launch Systems|Radial firing warhead system and method|
    US9329009B1|2013-03-15|2016-05-03|Vista Outdoor Operations Llc|Manufacturing process to produce programmed terminal performance projectiles|US2393275A|1943-09-04|1946-01-22|Budd Edward G Mfg Co|Method of making fragmentation bombs|
    US2382277A|1943-10-30|1945-08-14|Budd Edward G Mfg Co|Munitions|
    US2798431A|1951-01-25|1957-07-09|Howard W Semon|Fragmentation warhead|
    US3566794A|1958-11-26|1971-03-02|Us Navy|Controlled fragmentation of multi-walled warheads|
    US3956989A|1966-12-08|1976-05-18|The United States Of America As Represented By The Secretary Of The Army|Fragmentation device|
    US3599573A|1968-05-31|1971-08-17|Whittaker Corp|Composite preformed penetrators|
    US3783790A|1971-05-21|1974-01-08|Us Navy|Controlled fragmentation warhead|
    US3768414A|1971-05-21|1973-10-30|Us Navy|Controlled fragment warhead|
    DE2126351C1|1971-05-27|1978-04-27|Rheinmetall Gmbh, 4000 Duesseldorf|Process for the production of shells for projectiles, warheads or the like|
    US3799054A|1972-05-08|1974-03-26|Armament Syst Inc|Controlled fragmentation explosive device|
    US4089267A|1976-09-29|1978-05-16|The United States Of America As Represented By The Secretary Of The Army|High fragmentation munition|
    SE407695B|1977-08-31|1979-04-09|Bofors Ab|BATTLE PART OF STEEL AND WAY TO MANUFACTURE IT|
    DE3016861C2|1980-05-02|1984-07-12|Messerschmitt-Bölkow-Blohm GmbH, 8000 München|Warhead with a shell for fragmentation|
    DE3401249C2|1984-01-16|1994-01-27|Diehl Gmbh & Co|Projectile or warhead|
    USH238H|1986-07-18|1987-03-03|The United States Of America As Represented By The Secretary Of The Navy|Warhead casing of novel fragmentation design|
    US4781117A|1987-07-20|1988-11-01|The United States Of America As Represented By The Secretary Of The Navy|Fragmentable warhead of modular construction|
    EP0312491A1|1987-10-14|1989-04-19|Karl Merz|Fragmentation case for a metallic explosive warhead, and method for manufacturing it|
    DE3942955A1|1989-12-23|1991-07-04|Man Technologie Gmbh|Frangible armour plate - has plate divided into linear zones with fracture regions of reduced strength|
    FR2704638B1|1993-04-30|1995-06-23|Thomson Brandt Armements|MULTIPURPOSE MILITARY LOAD.|US20090320711A1|2004-11-29|2009-12-31|Lloyd Richard M|Munition|
    DE102007001998A1|2007-01-08|2008-07-10|Rheinmetall Waffe Munition Gmbh|explosive projectile|
    DE102008005098A1|2008-01-18|2009-07-23|Diehl Bgt Defence Gmbh & Co. Kg|Cover for projectile i.e. large calibrated ammunition of mortar shell, has pre-fragmentation unit to produce splinter, where linear structural change of defined depth of material of cover reduces tensile strength in zone upto certain depth|
    US8133119B2|2008-10-01|2012-03-13|Microsoft Corporation|Adaptation for alternate gaming input devices|
    US8294767B2|2009-01-30|2012-10-23|Microsoft Corporation|Body scan|
    US8866821B2|2009-01-30|2014-10-21|Microsoft Corporation|Depth map movement tracking via optical flow and velocity prediction|
    US8295546B2|2009-01-30|2012-10-23|Microsoft Corporation|Pose tracking pipeline|
    US9652030B2|2009-01-30|2017-05-16|Microsoft Technology Licensing, Llc|Navigation of a virtual plane using a zone of restriction for canceling noise|
    US8773355B2|2009-03-16|2014-07-08|Microsoft Corporation|Adaptive cursor sizing|
    US8988437B2|2009-03-20|2015-03-24|Microsoft Technology Licensing, Llc|Chaining animations|
    US9256282B2|2009-03-20|2016-02-09|Microsoft Technology Licensing, Llc|Virtual object manipulation|
    US8638985B2|2009-05-01|2014-01-28|Microsoft Corporation|Human body pose estimation|
    US9498718B2|2009-05-01|2016-11-22|Microsoft Technology Licensing, Llc|Altering a view perspective within a display environment|
    US8253746B2|2009-05-01|2012-08-28|Microsoft Corporation|Determine intended motions|
    US9898675B2|2009-05-01|2018-02-20|Microsoft Technology Licensing, Llc|User movement tracking feedback to improve tracking|
    US8340432B2|2009-05-01|2012-12-25|Microsoft Corporation|Systems and methods for detecting a tilt angle from a depth image|
    US8181123B2|2009-05-01|2012-05-15|Microsoft Corporation|Managing virtual port associations to users in a gesture-based computing environment|
    US9015638B2|2009-05-01|2015-04-21|Microsoft Technology Licensing, Llc|Binding users to a gesture based system and providing feedback to the users|
    US8942428B2|2009-05-01|2015-01-27|Microsoft Corporation|Isolate extraneous motions|
    US9377857B2|2009-05-01|2016-06-28|Microsoft Technology Licensing, Llc|Show body position|
    US8649554B2|2009-05-01|2014-02-11|Microsoft Corporation|Method to control perspective for a camera-controlled computer|
    US8503720B2|2009-05-01|2013-08-06|Microsoft Corporation|Human body pose estimation|
    US20100277470A1|2009-05-01|2010-11-04|Microsoft Corporation|Systems And Methods For Applying Model Tracking To Motion Capture|
    US8418085B2|2009-05-29|2013-04-09|Microsoft Corporation|Gesture coach|
    US8176442B2|2009-05-29|2012-05-08|Microsoft Corporation|Living cursor control mechanics|
    US8145594B2|2009-05-29|2012-03-27|Microsoft Corporation|Localized gesture aggregation|
    US8509479B2|2009-05-29|2013-08-13|Microsoft Corporation|Virtual object|
    US20100302138A1|2009-05-29|2010-12-02|Microsoft Corporation|Methods and systems for defining or modifying a visual representation|
    US20100306685A1|2009-05-29|2010-12-02|Microsoft Corporation|User movement feedback via on-screen avatars|
    US8625837B2|2009-05-29|2014-01-07|Microsoft Corporation|Protocol and format for communicating an image from a camera to a computing environment|
    US8379101B2|2009-05-29|2013-02-19|Microsoft Corporation|Environment and/or target segmentation|
    US8542252B2|2009-05-29|2013-09-24|Microsoft Corporation|Target digitization, extraction, and tracking|
    US9182814B2|2009-05-29|2015-11-10|Microsoft Technology Licensing, Llc|Systems and methods for estimating a non-visible or occluded body part|
    US9400559B2|2009-05-29|2016-07-26|Microsoft Technology Licensing, Llc|Gesture shortcuts|
    US8803889B2|2009-05-29|2014-08-12|Microsoft Corporation|Systems and methods for applying animations or motions to a character|
    US8856691B2|2009-05-29|2014-10-07|Microsoft Corporation|Gesture tool|
    US8320619B2|2009-05-29|2012-11-27|Microsoft Corporation|Systems and methods for tracking a model|
    US20100302365A1|2009-05-29|2010-12-02|Microsoft Corporation|Depth Image Noise Reduction|
    US8744121B2|2009-05-29|2014-06-03|Microsoft Corporation|Device for identifying and tracking multiple humans over time|
    US20100306716A1|2009-05-29|2010-12-02|Microsoft Corporation|Extending standard gestures|
    US9383823B2|2009-05-29|2016-07-05|Microsoft Technology Licensing, Llc|Combining gestures beyond skeletal|
    US7914344B2|2009-06-03|2011-03-29|Microsoft Corporation|Dual-barrel, connector jack and plug assemblies|
    US8390680B2|2009-07-09|2013-03-05|Microsoft Corporation|Visual representation expression based on player expression|
    US9159151B2|2009-07-13|2015-10-13|Microsoft Technology Licensing, Llc|Bringing a visual representation to life via learned input from the user|
    US20110025689A1|2009-07-29|2011-02-03|Microsoft Corporation|Auto-Generating A Visual Representation|
    US9141193B2|2009-08-31|2015-09-22|Microsoft Technology Licensing, Llc|Techniques for using human gestures to control gesture unaware programs|
    US20110109617A1|2009-11-12|2011-05-12|Microsoft Corporation|Visualizing Depth|
    US8942917B2|2011-02-14|2015-01-27|Microsoft Corporation|Change invariant scene recognition by an agent|
    US8620113B2|2011-04-25|2013-12-31|Microsoft Corporation|Laser diode modes|
    US8760395B2|2011-05-31|2014-06-24|Microsoft Corporation|Gesture recognition techniques|
    US8635637B2|2011-12-02|2014-01-21|Microsoft Corporation|User interface presenting an animated avatar performing a media reaction|
    US9100685B2|2011-12-09|2015-08-04|Microsoft Technology Licensing, Llc|Determining audience state or interest using passive sensor data|
    US8898687B2|2012-04-04|2014-11-25|Microsoft Corporation|Controlling a media program based on a media reaction|
    CA2775700C|2012-05-04|2013-07-23|Microsoft Corporation|Determining a future portion of a currently presented media program|
    US9857470B2|2012-12-28|2018-01-02|Microsoft Technology Licensing, Llc|Using photometric stereo for 3D environment modeling|
    US9738947B1|2014-04-18|2017-08-22|The United States Of America As Represented By The Secretary Of The Navy|Fragmentation device with increased surface hardness and a method of producing the same|
    法律状态:
    2000-12-14| AS| Assignment|Owner name: RHEINMETALL W & M GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BURCKHARDT, HELMUT;SIMON, WALTER;HEITMANN, THOMAS;REEL/FRAME:011370/0563 Effective date: 20001128 |
    2006-06-29| FPAY| Fee payment|Year of fee payment: 4 |
    2010-08-16| REMI| Maintenance fee reminder mailed|
    2011-01-07| LAPS| Lapse for failure to pay maintenance fees|
    2011-02-07| STCH| Information on status: patent discontinuation|Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
    2011-03-01| FP| Lapsed due to failure to pay maintenance fee|Effective date: 20110107 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE19960180A|DE19960180B4|1999-12-14|1999-12-14|Method for producing an explosive projectile|
    DE19960180.1||1999-12-14||
    DE19960180||1999-12-14||
    [返回顶部]