EP3475643A1 - Waffenrohr mit innenprofil - Google Patents
Waffenrohr mit innenprofilInfo
- Publication number
- EP3475643A1 EP3475643A1 EP17730744.4A EP17730744A EP3475643A1 EP 3475643 A1 EP3475643 A1 EP 3475643A1 EP 17730744 A EP17730744 A EP 17730744A EP 3475643 A1 EP3475643 A1 EP 3475643A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- field
- radius
- weapon
- profile
- bastion
- 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
- 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
Definitions
- the invention relates to a gun barrel for a firearm, but in particular not restricting a machine gun, with a tube inner profile.
- the gun barrel with the field-pull profile for heavily loaded weapons is characterized by the fact that the height of the fields to the flanks of the fields decreases by an amount.
- Tubes for firearms are exposed to significant loads. In addition to the propellant charge gas pressure these are charged during firing through the projectile to be fired. To be precisely guided, this has a larger outer diameter than the inner diameter of the barrel. This excess is degraded during the tube passage by deformation and wear.
- the inner tube profile of a drawn barrel provides for a precise guidance of the projectile in the tube and also sets the projectile in rotation about its longitudinal axis. This rotational movement, commonly referred to as a twist, is necessary for the stable flight of the projectile outside the weapon barrel.
- the inner profile is rotating with a certain pitch around the tube axis. The accelerated projectile follows this and rotates with increasing speed around its longitudinal axis.
- the design of the inner tube profile accordingly influences the interaction of the projectile.
- a small inner diameter causes a high pressing force of the projectile and ensures appropriate frictional forces.
- the occurring during pressing sizes such as deformation, friction and wear are coupled together and behave strongly non-linear.
- the effects of a special inner tube profile are predictable only with great theoretical effort.
- the internal pipe profiles are the result of empirical approaches.
- DE 200 02 365 U1 presents a barrel with an inner profile in a combination of pre-existing profiles, polygon and train / field profile, wherein the right-hand spiral edge leading edge is right sharp in the weft direction and the opposite side merges into a polygonal profile and no sharp edges ,
- US 2008/0120889 A1 describes a method for producing a field-pull profile.
- Such profiles are designed for a particular bullet type.
- problems can sometimes occur, such as impermissibly high peak gas pressure, poor precision massive wear of the gun barrel.
- These are usually coat bullets with lead core.
- the projectile cores are very soft and thus the entire projectile easily deformable.
- Hard core bullets with tungsten carbide core are significantly stiffer in construction and cause with polygon runs, i.
- Weapon tubes with a polygon inner profile a massive increase in tube wear.
- DE 10 2012 000 686 A1 discloses a weapon barrel with a chromed inner profile to increase the load capacity.
- the fields of the inner profile are designed as polygons trapezoidal and asymmetrical and are much narrower than the trains.
- the fields have on one side a relatively long increase in the form of a slope and on the other side a fast descending flank.
- the chrome plating is such that the chromium layer on the trains is thinner than that on the fields.
- the invention is based on the idea to obtain a much better contact pressure distribution in order to minimize wear.
- an inner profile is created, which is characterized indicates that the height of the fields (field height) decreases towards their edges. With the two front surfaces and the flanks, the fields resemble a bastion.
- Bastionsprofil a much cheaper contact pressure distribution is achieved than in the known inner profiles or field-train profiles.
- the field flanks albeit in somewhat reduced form, are retained, which in turn are well suited for transmitting the swirl moment. This construction allows the effect of the swirl moment on the field flanks to be spatially separated from the effect of the press-in operation on the surface of the fields.
- Bastionsprofil designed in this way improves the wear behavior when using hard core projectiles for weapons tubes at high firing cadences, such as in machine guns. Nevertheless, the precise bullet guidance of a normal field-train profile is maintained. Created is a heavy-duty gun barrel.
- 1 is a sketch-like representation of a 90 ° segment of a not to scale, four-span field-train profile
- Fig. 3 is a sketchy representation of a greedy strategy.
- Fig. 1 shows an illustration of a 90 ° segment 1 1 of a four-speed field-train profile 10 of a gun barrel of the prior art, not shown.
- This segment 11 consists of a traction radius 2 and a smaller field radius 1.
- the contour of the profile 10 runs in the field 5 or in the train 6 to the respective diameter (radius). The transitions are formed by straight sides 3, the so-called field flanks.
- the profile 10 is mirror-symmetrical to the bisector 4.
- Fig. 2 illustrates the derivation of a so-called bastion profile 20 from the field-pull profile 10 according to the prior art for better understanding.
- the field 25 has flanks 25.3 and 25.4.
- the height h of the fields 25 decreases towards the flanks 25.3 and 25.4 by an amount 29 out. The determination of this amount is as follows:
- a circle is constructed so that there is an intersection 22 on the bisector with a field radius.
- the center M also lies on the bisecting line 23.
- the radius 27 of the circle is chosen larger than the field radius. This contour is created (constructed) for each field 25, since the respective circle centers are not congruent.
- the material 28 is removed from the field 25 which lies within the bastion radius 27, ie, between the field radius 1 and the bastion radius 27. As a result, the field 25 only has its nominal height h in the middle, which is outwardly an amount 29 reduced.
- the maximum bastion radius 27 can be chosen so large that a residual height remains at the field edges, ie the field flanks 3 are not eliminated.
- Fig. 3 shows a four field / trains exhibiting Bastionsprofil 20 of a gun barrel 30 in a front view.
- the surface O of the fields 25 consists, in absolute terms, of a single radius. Relative to the nominal field radius, however, surface O ' is retreating (back-swept), resulting in two surfaces 25.1, 25.2 at an obtuse angle to each other (mental). With 26 trains are marked.
- the center M can also be on the other side of the profile, as shown in Fig. 2a.
- Bastionsprofil 20 is suitable for or as an inner profile in a heavily used gun barrel, especially a fast-shooting machine gun (machine gun). Of these, weapons systems in the small and medium caliber range are preferably affected.
- the tube profile can also be used with other tube types.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Toys (AREA)
- Powder Metallurgy (AREA)
- Telescopes (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HRP20230176TT HRP20230176T1 (hr) | 2016-06-23 | 2017-06-09 | Cijev oružja sa spiralnim udubljenjima i ispupčenjima u unutrašnjosti cijevi |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016111571.1A DE102016111571A1 (de) | 2016-06-23 | 2016-06-23 | Waffenrohr mit Innenprofil |
| PCT/EP2017/064153 WO2017220348A1 (de) | 2016-06-23 | 2017-06-09 | Waffenrohr mit innenprofil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3475643A1 true EP3475643A1 (de) | 2019-05-01 |
| EP3475643B1 EP3475643B1 (de) | 2022-11-23 |
Family
ID=59070637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17730744.4A Active EP3475643B1 (de) | 2016-06-23 | 2017-06-09 | Waffenrohr mit feld-zug-profil |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3475643B1 (de) |
| DE (1) | DE102016111571A1 (de) |
| HR (1) | HRP20230176T1 (de) |
| PL (1) | PL3475643T3 (de) |
| WO (1) | WO2017220348A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018123278A1 (de) | 2018-09-21 | 2020-03-26 | Rheinmetall Waffe Munition Gmbh | Verfahren zur Herstellung eines mit einem Drallprofil versehenen, hochwarmfesten Waffenrohres |
| US11609057B2 (en) * | 2020-12-15 | 2023-03-21 | Carl E Caudle | Circumferential rifling |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US329303A (en) | 1885-10-27 | fosbery | ||
| US835482A (en) | 1903-08-08 | 1906-11-06 | Peter Mulock | Rifling. |
| US1335444A (en) * | 1916-06-26 | 1920-03-30 | Arnold B Lashley | Rifling for firearms |
| DE1044675B (de) | 1955-06-11 | 1958-11-20 | Karl Burgsmueller | Drallzugprofil hoher Gasliderung fuer Geschosslaeufe |
| CH536478A (de) * | 1970-06-18 | 1973-04-30 | Rheinmetall Gmbh | Mit verlaufenden Feldern und Zügen versehener Lauf für Gewehre und Pistolen |
| GB1409331A (en) * | 1973-03-30 | 1975-10-08 | Devence Secreteary Of State Fo | Rifling |
| DE2738783A1 (de) * | 1977-08-27 | 1979-03-01 | Langbein Pfanhauser Werke Ag | Chusswaffe |
| US4308681A (en) | 1980-03-14 | 1982-01-05 | Gorman Richard M | Progressive ratchet rifling in a full gain twist |
| US4437251A (en) | 1980-03-14 | 1984-03-20 | Gorman Richard M | Full gain twist ratchet rifling |
| WO1997045690A1 (en) | 1996-05-31 | 1997-12-04 | Sharunova, Elena | Rifled barrel |
| IT1293616B1 (it) * | 1997-07-16 | 1999-03-08 | Guido Chiariello | Processo per la formazione di canne d'arma da fuoco o di dispositivi di lancio in genere |
| DE20002365U1 (de) | 2000-02-10 | 2000-05-31 | Spindler, Wilhelm, 94474 Vilshofen | Waffenlauf mit neuem Lauf-Innenprofil |
| US20080120889A1 (en) | 2006-07-03 | 2008-05-29 | Animesh Bose | Processing of rifled gun barrels from advanced materials |
| DE102012000686A1 (de) | 2012-01-17 | 2013-07-18 | Rheinmetall Waffe Munition Gmbh | Waffenrohr mit verchromtem Innenprofil |
-
2016
- 2016-06-23 DE DE102016111571.1A patent/DE102016111571A1/de not_active Withdrawn
-
2017
- 2017-06-09 PL PL17730744.4T patent/PL3475643T3/pl unknown
- 2017-06-09 WO PCT/EP2017/064153 patent/WO2017220348A1/de not_active Ceased
- 2017-06-09 EP EP17730744.4A patent/EP3475643B1/de active Active
- 2017-06-09 HR HRP20230176TT patent/HRP20230176T1/hr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| HRP20230176T1 (hr) | 2023-03-31 |
| EP3475643B1 (de) | 2022-11-23 |
| PL3475643T3 (pl) | 2023-04-24 |
| WO2017220348A1 (de) | 2017-12-28 |
| DE102016111571A1 (de) | 2017-12-28 |
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