CN1054131A

CN1054131A - A kind ofly assemble the method for firearm cartridge case and by implementing the cartridge that this method makes

Info

Publication number: CN1054131A
Application number: CN91100743A
Authority: CN
Inventors: 詹森·麦特
Original assignee: Gordon Consulting Engineering & Marketing Ltd
Current assignee: Gordon Consulting Engineering & Marketing Ltd
Priority date: 1989-12-22
Filing date: 1990-12-21
Publication date: 1991-08-28
Anticipated expiration: 2005-12-21
Also published as: YU241390A; DE69005432T2; CA2013981C; ATE99044T1; AU6825690A; BR9006561A; CN1023512C; AU635990B2; IT8903784A0; RU2069302C1; EP0435830B1; CA2013981A1; ES2047306T3; EP0435830A1; IT1235986B; DE69005432D1

Abstract

The cartridge case that is assembled into by three parts, three parts respectively are that a cylindrical pencil, one can insert reinforcement in the described pencil and one and encase pencil and be equipped with at the bottom of the bullet of an end of reinforcement, adopt a reinforcement that has a ready-made flange that indeformable basically material is made; Be open at both ends at the bottom of the bullet, use by making by the different straight section of diameter that the section that subtracts connects to overall diameter that diameter has constituted a bearing by the inner surface of the section of subtracting, this bearing can hold an end of described flange and pencil together.

Description

A kind ofly assemble the method for firearm cartridge case and by implementing the cartridge that this method makes

The present invention relates to the method for three type cartridge cases of a kind of assembling, and, relate to by implementing the available cartridge case of this method through extending.

Cartridge case, particularly those are used for the cartridge case of shotgun and gunnery meeting usefulness rifle, common method for making is several separated components to be assembled together form, these parts are primary factor with its material, can be to be worth arbitrarily, but should be as far as possible minimum, make and making and final the use all obtaining economic effect aspect two, identification be such assembling product generally ejaculation once be dropped.In the assembly method of the most received three cartridge cases, adopted at the bottom of the bullet of plastic tube or paper tube, the garden tubular reinforcement of also making by plastics or paper and metal.

Basically be a garden tube at the bottom of the bullet, its bottom is sealed, and by the border extended of this garden tube in conjunction with the edge of a casting, the limit of casting is used for producing an inside bearing that replenishes, and the bottom at the bottom of the bullet in central hole to hold the detonating cap of propellant.Be similarly the pencil of garden tubular, fluting enters at the bottom of the bullet up to fully near the bottom of sealing, and the periphery of insertion end can also be to the axial region of curls inward to it, and its reason can be clarified in due course.Reinforcement also is the garden cylindricality externally, has a centre bore, and this hole is designed to the hole that holds detonating cap at the bottom of bullet coaxial, and reinforcement made by deformable material, its reason below in the brief overview of usual method as can be seen.

For example, reinforcement is inserted into an end of pencil, then this pre-assembled end is pushed fully at the bottom of the bullet to contacting with the end of its sealing; As previously mentioned, under the revolute situation in the edge of pencil, pencil will be inserted at the bottom of the bullet, then reinforcement will be inserted in the pencil, be in the position of leaning on mutually with the edge that curls.After, along with three parts are located mutually and are accurately remained on the original position, a compression is applied on the reinforcement, this reinforcement that is bearing the pressure that produces requires to fulfil two basic functions: first, pencil is pressed to tube surface, interior garden at the bottom of the bullet, the second, the edge that curls of pencil is pressed into the bearing that produces in the casting limit at the bottom of the bullet and makes described pencil crimped edge warp-wise distortion.In this operating process, there is sizable mechanical stress to be applied to pencil particularly on the material of reinforcement, if in addition control rightly then can cause irremediable infringement.For example, if the power that is applied on the reinforcement is excessive, the pencil extension in being inserted at the bottom of the bullet can be too tight by what squeeze, and the ability of its tensile stress is weakened, and causes the loss of strength when cartridge is launched.

Described pencil does not enter gun barrel with separating at the bottom of the bullet when igniting in order to ensure the ammunition of filling, and this complicated accurate assembling is essential, otherwise its consequence obviously is dangerous.This same installation step also can be used to guarantee to hold detonating cap and the bullet of the cartridge case that supporting by reinforcement at the bottom of can produce strong resistance to the striker of rifle in the moment that detonating cap is clashed into; Only requisite rigidity and the intensity property that can guarantee when not allowing three parts generation relative motions must definitely accurately be calculated, to avoid taking place the irregular any risk of detonating and exploding of institute's arming.

The further purpose of the described operation of being discussed is to eliminate or reveal to major general's fuel gas to reduce to minimum, and this leakage is tended to occur between pencil and the reinforcement, and it makes distortion at the bottom of the bullet and thereby can influence the stereochemical structure of cartridge case.

Thereby many eigenvalue problems have been proposed in assembly manipulation, and wherein at first be, need technical sophistication and powerful machinery, require it can in the space that limited interior volume such as cartridge case can provide, produce sizable power.Have again, combine with reinforcement and to it exert pressure machine part must have accurate shape so that it can accurately the application of force guarantee that three parts firmly connect, and obtain rigidity at the bottom of the required bullet.

Can not ignore manyly has external factor adverse effect, that tend to hinder strong bonded between three parts to assembly manipulation.The limited size of the bearing that the casting limit at the bottom of in these unfavorable factors bullet being arranged is provided repeats pencil and reinforcement material and evenly inserts bearing reaching effectively fixing difficulty, and the elastic reinforcement material recovers the possible tendency of its original-shape.

Caused successfully having formed that the internal orifice of bearing has tangible difficulty at the bottom of the bullet owing to prove conclusively pressure to reinforcement by means of non-destructive technological means or optical instrument, this factor to described these four corners further increases the weight of again, and in fact forming described internal orifice is to guarantee that part forms a key element determining connection between three portions.

Corresponding, the method that the purpose of this invention is to provide a kind of assembling three component type cartridge cases, thus by means of one or more building blocks distortion of tending to not make cartridge case and therefore change the powerful pressure in assembling process of its geometry, can make connection between three parts through igniting and extracting and still keep firmly by assembling.

Further aim of the present invention is to adopt a kind of simple, reasonable and economic method that can overcome defective above-mentioned to make the assembling of cartridge case be achieved.

The purpose of stating is above realized widely that by adopting the design as the described cartridge case of disclosure the inner characteristic of this design is not rely on the distortion of reinforcement to obtain closely cooperating between three parts; What replace it is, adopted at the bottom of the bullet of bottom opening and by basic reinforcement for making for rigid material, this reinforcement has the essential stop flange that has become one, at the bottom of pencil and reinforcement inserted bullet by opposite direction, exempted the needs to big pressure, remaining just rolls up the end mouth at the bottom of the bullet to its center simply.

Now with the form of embodiment the present invention is carried out detailed narration by means of accompanying drawing, wherein:

-Figure 1 shows that the axial cutaway view that preparation is assembled by disclosed method according to three parts of cartridge case of the present invention;

-Fig. 2 ... 4 be depicted as seen in the process of the consecutive steps of disclosed method to Fig. 1 in the further axial cutaway view of three parts;

-Figure 5 shows that axially the cuing open of a different embodiment of the cartridge case among Fig. 4 to figure;

-Fig. 6 ... 8 are depicted as three different embodiment of the reinforcement shown in Fig. 1.

With reference to accompanying drawing, according to the cartridge case that method of the present invention can be assembled into, it is whole represents with 1, comprises three parts: garden tubular pencil 2, can be inserted at the bottom of reinforcement 3 in the pencil and the bullet 4.

Disclosed method at first and the most important thing is to be to make with non deformable material basically and be the reinforcement 3 of garden cylindricality substantially, its shape has a garden mouth or a flange at least, represent with 31, the maximum gauge 3d of this flange is greater than the maximum gauge 2d of pencil in illustrated embodiment, and with respect to the outwards expansion of post surface, garden of this building block.

Need many speeches, reinforcement 3 is not to say so non deformablely on any absolute sense, and this only is meant in the step process of disclosed method and does not deform.Have again, with reference to can be easily according to the non deformable reinforcement 3 of cartridge case of the present invention forming tangible difference with the corresponding building block of common cartridge case, common reinforcement will pass through violent distortion in assembling process, its geometry and mechanical performance all change; And use powerful pressure usually is in order to improve flat rigidity at the bottom of the bullet, and this idea has significantly limited the number of the profile that reinforcement can adopt just, and reinforcement directly contacts with propellant in the cartridge case of making.

The further means that method of the present invention comprises are, employing has at the bottom of the bullet of two coaxial straight sections 4, this two straight section 41 is different with 42 internal diameters respectively to be 41d and 42d, wherein less diameter 41d equates substantially that with the external diameter 2d of pencil 2 bigger diameter 42d equates substantially with the maximum gauge of the flange 31 of reinforcement 3.Described two coax segments 41 and 42 interconnect by extension 43, extension 43 is used for producing the garden periphery that the profile with the abducent flange 31 of reinforcement 3 is complementary, its inside has produced an additional bearing 45, and this bearing is of a size of an end 21 that can hold flange 31 and pencil 2 together.Adopt at the bottom of the reinforcement 3 so specialized and the bullet 4, disclosed method comprises following step:

-pencil 2 is inserted at the bottom of the bullets 4 to surpass the position shown in the label 44 to insertion end 21, this position is that 4 diameter segment 41 combines part with limit, garden 43 at the bottom of the bullet, the distance 1 that exceeds is not less than the axial dimension (Fig. 2) of all flanges 31 in garden;

-with reinforcement 3 be inserted at the bottom of the bullet 4 and the jag 21 of pencil 2 in, make jag 21 open and contact with the inwall of bearing 45 (Fig. 3).

-with at the bottom of the bullet 4 be folded to the center to contact (Fig. 4) with reinforcement 3 than enlarged diameter section 42

The length 1 of pencil 2 insertion ends 21 is variable, its minimum of a value is shown in Fig. 4, the flange 31 of reinforcement 3 contacts with 4 the direct fit of the inwall than enlarged diameter section 42 at the bottom of the bullet in this case, the maximum of length 1 has surpassed the axial dimension of flange 31, the bus that is parallel to it is measured, and at this moment pencil protrudes into that (see figure 5) of sealing flange 31 fully than reaching in the enlarged diameter section 42.In this example, garden week, the external diameter 3d of flange 31 was substantially equal at the bottom of the bullet the 4 internal diameter 42d of section relatively, was the twice of pencil 2 thickness less than the difference of 42d.

Can find out significantly immediately, the crucial part of disclosed method has been to adopt the reinforcement of moulding in advance, and this reinforcement can be assembled together with other building block and produce the assembling integral body of rigidity, and the geometry of determining that it adopted is all remaining unchanged in the installation step.

Term with other is expressed, and is guaranteed by a kind of geometry in the stability that cooperates between 4 at the bottom of pencil 2, reinforcement 3 and the bullet, and this shape can be seen clearly before assembling and can prove conclusively, and this shape still keeps stablizing constant up to the installation step end.

Corresponding, be used for three building blocks be at the bottom of pencil 2, reinforcement 3 and the bullet 4 machines that are fixed together to compare with at present used machine then be simple and economical equipment; Like this, make the expense of cartridge case and cut down significantly, this must help quite little investment, the remarkable saving of manpower, raw material and equipment maintenance cost.In fact traditional equipment as for using at present, require equipment for example to discharge sizable power in the space that pencil surrounded of cartridge case in limited space, and the method for in fact using is to adopt more high-precision machine (especially for pressure).As for raw-material consumption, make it undoubtedly to be minimized by adopting disclosed method, because 4 be designed to opening at the bottom of the bullet, and the example of prior art all seals.Have, disclosed method allows to save the flange crimping operation to an end of pencil 2 again, and the purpose of this operation is the cooperate degree of improving between three parts.

As shown in Figure 4, by implementing the typical cartridge case 1 that disclosed method obtains, can find out that it is pencil 2, entangles at the bottom of the open-ended bullet of pencil 4 and reinforcement 3, this reinforcement has radially outstanding garden week flange 31, and this reinforcement is inserted in the pencil.Clear and definite in assembling process reinforcement 3 needn't cross the distortion that can perceive by critical path, then can give and can guarantee cartridge case 1 effective best geometry on function and trajectory as far as possible to reinforcement.

For example, label 38 has marked parts 3 and the contacted part of propellant, and it can be a cup-shaped as shown in the figure, and this part can have ridge 33, and the garden week that centers on the axis hole 32 of reinforcement 3 is provided with, and hole 32 is used for holding ignition cap 5.The function that these ridges 33 are had is that the flame that propellant powder in the cup 38 do not make the ignition cap 5 that is arranged in hole 32 send that guarantees to pack into subsequently suffocates, and they can be a plurality of fins from the hole radiation; With clear and definite term, these fins are used for strengthening igniting the flame that cap 5 sends and propagate forward.

The axis hole 32 of reinforcement 3 can be realized in every way, so that it can hold difform ignition cap; For example, hole 32 can comprise a stiffener 34, is used as the anvil (Fig. 7) that traditional " Berdan " type is ignited cap.

In a further embodiment, reinforcement 3 can have all grooves 35 in a garden, and produces a web 37, warpage under the fierce promotion that this web can produce between groove 35 and cup 38 when the explosive powder is ignited.In such embodiment, the basic non-deformable of the flexibility of connecting plate 37 and foregoing reinforcement keeps compatible.In fact, although in the process of described step under the effect of issuable power in the assembling process of three building blocks of cartridge case web 37 do not produce distortion, though be launched and the power in the step of comparison said method of standing can be observed its really when definitely being infinitely-great power deformation takes place when cartridge case later on.

Figure 8 shows that useful especially embodiment concerning saving raw material.More precisely, reinforcement 3 is being reduced material by point 36 places of that side that is contained than enlarged diameter section 42 at the bottom of the bullet, and with regard to this example of being discussed, the means of being taked are simply to excavate the blind hole of some.Because in the assembling process of cartridge case 1, this reinforcement can not stand this fact of any noticeable distortional stress, making takes such means truly feasible, and such means can keep under the condition that the shape of this reinforcement can not change, then it can adopt any selected geometry, as long as it comprises garden week flange 31 taking.

Method disclosed herein provides the means easily of undiscovered in the prior art manufacturing cartridge case, just can be used for constructing the geometry of the reinforcement 3 of cartridge case according to feature selecting; Reinforcement 3 plays a positive role in assembling like this, because the performance performance of the shape of having determined it and the cartridge case of making at last has important relationship.

Claims

1, a kind of method of assembling three component type firearm cartridge cases, these three parts are:

-garden cylindricality the pencil made by plastics or paper material:

-be the reinforcement of garden cylindricality substantially by what indeformable material was basically made, it can insert an end of described pencil, and comprise garden mouth or the flange that at least one is radially outstanding at the one end, the maximum outside diameter of this flange is not less than the external diameter of described pencil, and its profile is by the outwards expansion of garden post surface;

At the bottom of-open-ended the bullet, it encases at least, and pencil is reinforced that end that part occupies, and it has two continuous coaxial but straight sections that internal diameter is different, this less diameter equates with the external diameter of pencil basically, this bigger diameter basically with the garden of reinforcement week flange external diameter equate, described two straight sections are connected by the another one extension, this extension has the abducent profile that matches with the flange of reinforcement, it is used for setting up a limit, outside garden and an auxiliary interior bearing, holds the flange of the reinforcement that combines and an end of pencil in this in the bearing;

This method comprises the following steps:

-pencil inserted at the bottom of the bullet to insertion end to surpass diameter segment and the plan-position that the garden periphery combines at the bottom of the bullet, the distance that exceeds is not less than the axial length of this abducent bus in limit, garden;

-insert reinforcement at the bottom of the bullet and the jag of pencil, make this jag deform, and this jag is contacted closely, equably with the interior bearing that garden periphery at the bottom of the bullet is provided by indeformable flange;

-with at the bottom of the bullet than the enlarged diameter section winding, curl foldingly in other words conj.or perhaps, make it contact with the reinforcement that is centered on by it.

2, the method for claim 1, it is characterized in that reinforcement garden week flange maximum outside diameter equate substantially with the difference that deducts behind the twice pencil thickness than large diameter at the bottom of the bullet.

3, the method for claim 1, the insertion end that it is characterized in that pencil exceed the distance on the plane that the diameter segment at the bottom of the bullet is connected with the garden periphery, are not less than the axial length of the abducent bus of this garden periphery.

4, the method for claim 1, it is characterized in that the pencil insertion end exceeds the axial length that diameter segment at the bottom of the bullet is connected the plane with the garden periphery distance is not less than the peripheral abducent bus in this garden, and in the time of at the bottom of reinforcement all inserts bullet and in the pencil, the insertion end of pencil is no more than the bottom surface of reinforcement.

5, the method for claim 1, the insertion end that it is characterized in that pencil exceeds the axial length that diameter segment at the bottom of the bullet is connected the plane with the garden periphery distance is not less than the peripheral abducent bus in this garden, and in the time of at the bottom of reinforcement all inserts bullet and in the pencil, the insertion end of pencil exceeds reinforcement, and the distance that exceeds is to make it to be fixed between the bottom surface than the folded edge of enlarged diameter section and reinforcement at the bottom of the bullet.

6, a kind of by implementing the available three component type cartridge cases of method of claim noted earlier, comprising:

-garden cylindricality pencil;

At the bottom of the bullet of-garden cylindricality, hollow, be designed to encase an end of pencil, its two ends can both penetrate fully, and it has the different straight section of diameter, and described straight section is connected by other extension, and described extension has constituted neighboring and auxiliary interior bearing;

-can be inserted into the reinforcement in the pencil, make with the material that the installation step through described method keeps not deforming substantially, at the one end all flanges in a garden are arranged, the part of the correspondence of the end that this flange can be wrapped by interior bearing and pencil comes together to hold, so, with at the bottom of the bullet than the outstanding limit volume of enlarged diameter section axial region to cartridge case, make seal described bearing and force flange and the respective end of pencil near inner surface as the garden periphery of auxiliary support.

7, cartridge case as claimed in claim 6, it is characterized in that reinforcement has an axis hole, be used for holding the ignition cap, and directly with on the surface that the propellant powder contact providing the protrusion of multiple source, its objective is in order to prevent that the powder that flame by the generation of ignition cap is loaded into pencil from suffocating from axis hole.

8, cartridge case as claimed in claim 7, it is characterized in that with surface that the propellant powder contacts on the protrusion that is derived from axis hole that provided be a plurality of by axis hole to extraradial fin.

9, cartridge case as claimed in claim 7 is characterized in that the shape of reinforcement upper shaft hole matches with the shape of the ignition cap that is held.

10, cartridge case as claimed in claim 9 is characterized in that the coaxial component of an anvil of being used as for certain portions to ignite cap of axis hole of reinforcement is occupied, and this ignition cap is held by the axis hole rest parts.

11, cartridge case as claimed in claim 6 is characterized in that the profile of reinforcement and physical dimension are chosen as to make cartridge case have best ballistic characteristics and security performance, and to matching requirements without any restriction.

12, cartridge case as claimed in claim 6, it is characterized in that selecting under to the condition of matching requirements without any restriction the profile and the physical dimension of reinforcement, making when running into fiercely pushing that propellant combustion produces that reinforcement enters at least that pencil part farthest becomes can axial bending.

13, cartridge case as claimed in claim 12 is characterized in that reinforcement has garden week groove, and this groove and propellant are separated by a web, and the thickness of this continuous slab is can do bending motion when running into acutely pushing that propellant combustion produces.

14, cartridge case as claimed in claim 6 is characterized in that forming at least one concave surface or breach by the one side that does not contact with propellant at reinforcement makes it reduce material.