DE1553875A1 - Barrel, especially for handguns - Google Patents

Description

Registration: Stuttgart »January 20, 1967

Heckler & Koöls GmbH. P 1555 S / kg Oberndorf / Beok &? R

Barrel, especially for handguns Addition see patent .. (Pat. Anm ₀ H 60 794 Io / 72a)

The invention relates to a barrel, in particular for hand handguns, with einam showing Entlaatungarillen Cartridge chamber "

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The upon release of a shot in the inside of the cartridge case pressure building up strives to expand the cartridge case and therefore be anzupreosen to the inner wall of the cartridge chamber ₃ Infolgedeeoen the friction between the cartridge case and the barrel chamber is so large that automatic firearms a perfect extraction of the Sleeve is no longer guaranteed in Tielen cases. In order to avoid such a seizure of the sleeve, so-called relief grooves are used; these are in the wall of the cartridge chamber buried _t in the longitudinal direction of the bearing to close extending to the cartridge base Rillen2 in which a counter-pressure can build up, the ο applying of the cartridge case to prevent the wall of the cartridge chamber This Entlastuzigsrillen have / iesen be very effective erv ₉ however, their production is extremely difficult because these grooves have to be cut into the finished barrel. This requires very fine hook steels; which must be inserted into the sngen barrel mouth, and by which then the grooves clamping "are buried for clamping It is understood _p that sin incorporating the relief groove * rm which a relatively large number of views on the circumference of the cartridge chamber must be distributed, very time consuming ieto Darüborhinaus is it special

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difficult _(to adhere to the required _{ very tight tolerances ^ these relief grooves must not only have a precisely dimensioned width and depth, but they must also begin at a precisely defined point at the front end of the cartridge chamber ^ follow the conical widening of the cartridge chamber to the rear and shortly before the rear end of the cartridge chamber run out so that the sealing effect of the case is retained at its rear end roll.

The invention is based on the object _f to create a lastungsrillen with Ent "provided cartridge chamber that is very ^ iel easier to Herfitellung and also still gegenübex · dsm known cartridge chamber vorteiihEifte Tiigens chaf th aufweistc This task is _f solved by Oer invention in that the Cartridge chamber as well as the sucked part of the barrel ea according to patent .. <, (Patο application H 60 794 Ic / 72a) seen in cross-section roughly the shape of a Yieleok with rounded corners

has and is so dimensioned; that the pages of the Polygons "tangent to the cartridge case"

It can be seen that such a cartridge chamber is used is much easier to manufacture than a bearing that

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has a plurality of relief grooves that must be buried individually «. In particular, such a cartridge chamber can be used in the same way like a barrel with a polygonal cross-section with the help of a hammer mandrel, the cross-section of which also corresponds to the internal cross-section of the chamber corresponds ο In this case, all additional wages Work on the production of the discharge grooves now formed by the polygonal shape of the cartridge chamber omitted,

In addition, the polygonal cross-section of the chamber has the further advantage that the cartridges are only in line contact with the barrel part surrounding the chamber »As a result, the Heat transfer between the barrel and the cartridge case is significantly reduced, so that the risk of a Auto-ignition of the cartridge is reduced «Ss is therefore possible to shoot a larger number of cartridges than su with a barrel designed according to the invention old a barrel of known design. The line contact between the cartridge case and barrel is also advantageous for firing maneuver cartridges made of plastic,

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rermindert due to the line contact the risk ₉ eats that a plastic cartridge wegan over festklebtο excessive heating is thus also herein the term erfindungsggmäße the conventional runs superior

So that the seal of the cartridge chamber is maintained even with the rfihdisngsgem according to barrel Toll; the invention is in a preferred embodiment, the polygonal profile of the cartridge chamber continuously in a circle "profile over ;, which close the outer end of the cartridge chamber begins ο It is also expedient _s dam Much =" eckproftl to give the cartridge chamber the same twist as the features of the Barrel «In this case we can hammer the rifles, the barrel and the chamber in a single operation for 2 hours. The profile of the cartridge chamber advantageously has a greater number of tqil eeken than the barrel rifling, because a greater number of iron reliefs on the circumference of the cartridge case has a better effect. In many cases it would then be more appropriate to use the The number of corners of the chamber profile should be selected so that the tie is an integral multiple of the number of trains provided in the barrel.

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Further details and configurations of the invention can be found in the following description; in which the invention is described and explained in more detail with reference to the exemplary embodiment shown in the drawing.

Pig. 1 shows a longitudinal section through the rear section a run according to the invention and

Fig. 2 is a section along the line H-II through the barrel according to Pig. 1 on an enlarged scale ₀

The barrel shown in the drawing has a drawn part 1 and a part 2 with the chamber on which their shape in a single operation by hammering on a correspondingly profiled hammer mandrel have received. The drawn part 1 of the barrel is provided with polygonal lines; as dealt with in the main patent sindο Bas polygon profile of the drawn running part 1 give steadily into the polygonal profile of the cartridge chamber 3, that from Pig. 2 can be seen.

Like Pig. 2 shows, the cartridge chamber 3 has a cross-section of the pona of a decagon with rounded ones

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Eoken and Pages? daa is dimensioned so that the side sections 4, the cartridge case 5> which is only indicated by dashed lines in Fig. 1, tangent = it arises in this way in the area of the corners 6 between the wall of the cartridge chamber "3 and the outer surface of the case 5 cavities 7, which act as discharge grooves c The polygonal profile goes, as indicated in Fig. 1, at the rear end of the chamber in a section 8 of length 9 with circular cross-section over? that ensures that the cartridge seals the chamber in the desired manner when the shot is released.

The grooves formed by the rounded corners 6 of the cartridge chamber 3 have, in the illustrated embodiment, the same twist as the trains in the barrel part 1c A single hammer mandrel can then be used to hammer the barrel, which has a cross-section of the Has drawn tread adapted section on which is followed by a section corresponding to the cartridge chamber. This hammer mandrel can then after completion of the barrel can be easily pulled out of the barrel to the rear ο To create a clean transition between the drawn part 1 of the barrel and the chamber 3, it is useful if the number of corners of the

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Profile of the cartridge chamber forms an integral multiple β of the trains. The trains can then go over into corresponding parts of the chamber polygon and it is sufficient to insert further polygon parts between these sections. Accordingly, the barrel shown in the drawing has five trains.

It goes without saying that the invention is not restricted to the exemplary embodiment shown, but that deviations therefrom are possible without departing from the scope of the invention . So it understands that depending on the type of weapon for which the barrel is to be used, a different design of the cartridge chamber and the choice of a different number of relief grooves are possible. It is also possible to use the cartridge chamber according to the invention with heavier weapons and then to bring the cartridge chamber into the desired polygon shape by machining, for example by broaching or grinding.

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Claims (5)

Claims [1) iiauf, especially for handguns, with a ^ "■" ^ cartridge chamber having relief grooves, thereby characterized in that the cartridge chamber (3) in the same way as the drawn part of the barrel according to patent <> .. (Patent application H 60 794 Ic / 72a) seen in cross section roughly the shape of a polygon with rounded corners (6) ■ has and is dimensioned so that the sides ^{1 of} the polygon touch the cartridge case (5). 2) barrel according to claim 1, characterized in that the polygonal profile of the cartridge chamber (3) steadily in a Circular profile (8) passes that begins near the outer end of the chamber " 3) barrel according to claim 1 or 2, characterized in that that the polygonal profile (4, 6) along the chamber (3) has the same twist as the trains of the barrel » 4) barrel according to one of the preceding claims, characterized in that the profile of the cartridge chamber (3) - Has a greater © number of corners (6) than the Zügec-Lauf 109833/0007 * ^{/ o} - ίο - 5) barrel according to claim A ₉ characterized »that the number of corners (6) of the cartridge chamber profile forms an integral multiple of the number of trains provided in the barrel (1)» 109833/0007