EP3853386A1 - Verfahren zur herstellung eines mit einem drallprofil versehenen, hochwarmfesten waffenrohres - Google Patents
Verfahren zur herstellung eines mit einem drallprofil versehenen, hochwarmfesten waffenrohresInfo
- Publication number
- EP3853386A1 EP3853386A1 EP19759572.1A EP19759572A EP3853386A1 EP 3853386 A1 EP3853386 A1 EP 3853386A1 EP 19759572 A EP19759572 A EP 19759572A EP 3853386 A1 EP3853386 A1 EP 3853386A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- profile
- tube blank
- mpa
- tempered
- barrel
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/10—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes shotgun barrels
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/12—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes barrels for ordnance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/152—Making rifle or gun barrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/152—Making rifle or gun barrels
- B21C37/153—Making tubes with inner or outer guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes or tubes with decorated walls
- B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes or tubes with decorated walls with helical guides
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
- F41A21/16—Barrels or gun tubes characterised by the shape of the bore
- F41A21/18—Grooves-Rifling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2261/00—Machining or cutting being involved
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
Definitions
- the invention relates to a method for producing a with a swirl profile NEN, heat-resistant gun barrel, especially for small-caliber machine guns.
- the invention is therefore based on the object of specifying a cost-effective method for the manufacture of a weapon barrel in which a significant plasticization of the inner tube wall and thus the swirl profile when firing hard core ammunition is avoided in particular with an intense rhythm of fire.
- materials with a high plug-in limit do not allow the use of an inexpensive swirling method, such as hammering over a mandrel or extrusion.
- the invention provides to apply the inexpensive hammering or extrusion. This becomes possible if the production sequence is reversed.
- the profile is inserted at a low level of strength.
- the twist profile of the weapon barrel is not introduced into a barrel blank, the material of which has already reached its final strength due to tempering, but which has a lower strength level (approx. 800-1 OOOMPa).
- the tempering (or final remuneration) of the steel carried out to a predetermined strength value> 1 OOOMPa and the further mechanical processing of the pipe blank provided with the swirl profile.
- the changes in the pipe blank caused by the remuneration must first be determined and then taken into account when introducing the swirl profile (using a preparatory measure).
- the material undergoes volume changes in the coating, which leads to smaller caliber diameters after the coating.
- the field-train diameter must therefore be selected a few 1 / 100mm larger in order to maintain the diameter tolerances. If necessary, the field diameter can also be reworked slightly mechanically.
- the tempering of the pipe blank subsequent to the introduction of the swirl profile is carried out under vacuum in order to avoid scaling of the inner pipe surface.
- the tempered weapon barrel can be provided with an erosion protection layer, such as hard chrome plating. Further details and advantages of the invention result from the following exemplary embodiment.
- a heat-resistant steel for example with 0.25-0.35% C, 3-5% Cr and 1 -3% Mo, was used to produce a weapon barrel for a machine gun MG3. This steel is first pre-machined into a tube blank.
- the inner pipe surface is extruded with the desired swirl profile (here field / tensile profile) taking into account the previously determined preparatory dimension.
- the tube blank provided with the swirl profile is vacuum-tempered to the desired yield strength of e.g. > 1300 MPa tempered.
- the tube blank was first heated to the austenitizing temperature, followed by rapid cooling and subsequent tempering treatment for service strength.
- an anti-erosion layer e.g. a technical hard chrome plating.
- the invention is of course not limited to the embodiment described above, for example.
- another suitable high-alloy steel can also be used.
- the tube blank can be tempered in several sections, so that the swirl profile is introduced after a first tempering (pre-tempering), at which the yield point is ⁇ 1000MPa and only then is the final remuneration to a value> 1000Mpa.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Articles (AREA)
- Extrusion Of Metal (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018123278.0A DE102018123278A1 (de) | 2018-09-21 | 2018-09-21 | Verfahren zur Herstellung eines mit einem Drallprofil versehenen, hochwarmfesten Waffenrohres |
| PCT/EP2019/072857 WO2020057916A1 (de) | 2018-09-21 | 2019-08-27 | Verfahren zur herstellung eines mit einem drallprofil versehenen, hochwarmfesten waffenrohres |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3853386A1 true EP3853386A1 (de) | 2021-07-28 |
Family
ID=67777322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19759572.1A Pending EP3853386A1 (de) | 2018-09-21 | 2019-08-27 | Verfahren zur herstellung eines mit einem drallprofil versehenen, hochwarmfesten waffenrohres |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11814694B2 (de) |
| EP (1) | EP3853386A1 (de) |
| AU (1) | AU2019343444B2 (de) |
| DE (1) | DE102018123278A1 (de) |
| WO (1) | WO2020057916A1 (de) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1927822A1 (de) * | 1969-05-31 | 1972-03-02 | Heckler & Koch Gmbh | Verfahren zur Herstellung eines vergueteten Waffenlaufes |
| DE19544824C2 (de) * | 1995-08-23 | 1998-06-04 | Rheinmetall Ind Ag | Gezogenes Waffenrohr und Verfahren zur Herstellung eines derartigen Rohres |
| US20040140292A1 (en) * | 2002-10-21 | 2004-07-22 | Kelley John E. | Micro-welded gun barrel coatings |
| DE102006025241A1 (de) * | 2006-05-29 | 2007-12-06 | Rheinmetall Waffe Munition Gmbh | Verfahren zur Herstellung von Schmiedestahl für hoch beanspruchte Waffen, Rohr-Rohlinge sowie eine damit ausgerüstete Waffe |
| US8910409B1 (en) * | 2010-02-09 | 2014-12-16 | Ati Properties, Inc. | System and method of producing autofrettage in tubular components using a flowforming process |
| AT508777B1 (de) * | 2010-04-06 | 2011-04-15 | Boehler Edelstahl Gmbh & Co Kg | Geschosslauf von feuerwaffen |
| US20180051967A1 (en) * | 2016-05-17 | 2018-02-22 | Todd Ronald Schwark | Self-spinning bullet and related methods of use |
| DE102016111571A1 (de) | 2016-06-23 | 2017-12-28 | Rheinmetall Waffe Munition Gmbh | Waffenrohr mit Innenprofil |
-
2018
- 2018-09-21 DE DE102018123278.0A patent/DE102018123278A1/de active Pending
-
2019
- 2019-08-27 EP EP19759572.1A patent/EP3853386A1/de active Pending
- 2019-08-27 WO PCT/EP2019/072857 patent/WO2020057916A1/de not_active Ceased
- 2019-08-27 AU AU2019343444A patent/AU2019343444B2/en active Active
-
2021
- 2021-03-22 US US17/208,614 patent/US11814694B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US20210207233A1 (en) | 2021-07-08 |
| DE102018123278A1 (de) | 2020-03-26 |
| US11814694B2 (en) | 2023-11-14 |
| WO2020057916A1 (de) | 2020-03-26 |
| AU2019343444B2 (en) | 2022-05-19 |
| AU2019343444A1 (en) | 2021-03-25 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20210127 |
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| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
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| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: RHEINMETALL WAFFE MUNITION GMBH |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17Q | First examination report despatched |
Effective date: 20221129 |