EP3986633A1 - Base part for producing a cartridge case and cartridge case, method for producing a base part for a cartridge case, and method for producing a cartridge case - Google Patents
Base part for producing a cartridge case and cartridge case, method for producing a base part for a cartridge case, and method for producing a cartridge caseInfo
- Publication number
- EP3986633A1 EP3986633A1 EP21733079.4A EP21733079A EP3986633A1 EP 3986633 A1 EP3986633 A1 EP 3986633A1 EP 21733079 A EP21733079 A EP 21733079A EP 3986633 A1 EP3986633 A1 EP 3986633A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- case
- base part
- forming
- cartridge case
- sleeve
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 claims description 46
- 239000003380 propellant Substances 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 6
- 238000005304 joining Methods 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910001369 Brass Inorganic materials 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000010951 brass Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000004049 embossing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/08—Primers; Detonators
- F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
- F42C19/083—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition characterised by the shape and configuration of the base element embedded in the cartridge bottom, e.g. the housing for the squib or percussion cap
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
- B21K21/04—Shaping thin-walled hollow articles, e.g. cartridges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B21/00—Depth charges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/26—Cartridge cases
- F42B5/28—Cartridge cases of metal, i.e. the cartridge-case tube is of metal
Definitions
- Base part for producing a cartridge case and cartridge case Method for producing a base part for a cartridge case and method for
- the invention relates to a base part for producing a cartridge case, which has a case base for receiving a primer cap, a circumferential pull-out recess being provided on the outer circumference of the base part.
- the invention also relates to a cartridge case with a cylindrical case which has a case opening for receiving a propellant charge and a projectile, as well as a base part opposite the case opening.
- the invention also relates to a method for producing the base part and the cartridge case.
- EP 2 690 391 A1 discloses a method for producing a cartridge case. In the known method is in a sleeve blank by means of deformation of the
- Blank produced an extractor groove in the form of a circumferential surface of revolution.
- a relatively complex forming tool is required, which among other things. includes a placeholder.
- the placeholder in turn comprises 6 to 8 segments.
- WO 2014/051940 A1 and EP 3372 324 A1 disclose methods for producing an integrally formed sleeve blank.
- the pull-out groove in the form of a circumferential surface of revolution is produced in the sleeve blank by means of a machining process.
- the machining of an extractor groove is complex.
- US 10041770 B2 discloses the production of a two-part cartridge case. To produce such a two-part cartridge case, a with a circumferential pull-out groove provided with a bottom part connected to a sleeve. The manufacture of two-part cartridge cases is also complex.
- the object of the invention is to eliminate the disadvantages of the prior art.
- a base part for producing a cartridge case and a cartridge case are to be specified, which can be produced in a simplified manner.
- methods for producing a base part and / or a cartridge case that can be carried out as simply and inexpensively as possible are to be specified.
- the pull-out recess have a polygonal geometry which is formed in cross-section from a closed line.
- the pull-out recess is designed as a groove and thus as a circumferential surface of revolution which forms a circle in cross section.
- the proposed polygonal shape of the extractor recess can be produced in a simplified manner, in particular by means of forming processes. During forming, material can flow from the center of each section of the section train in the direction of the corners delimiting the sections in the cross section.
- an extractor recess which has a polygonal geometry.
- a “bottom part” in the context of the present invention is usually a body that is cylindrical at least in sections.
- the term “cross section” is understood to mean a cutting plane which intersects the cylinder axis perpendicularly and runs through the pull-out recess.
- the term “pull-out recess” is understood to mean a recess extending radially inward from the outer circumference of the base part or a base section.
- the extraction recess can be produced in that it is pressed in from the outer circumference by a force acting radially inward.
- At least some of the routes forming the route train are straight.
- all of the routes are straight.
- at least some of the lines forming the line segment are curved (for example convex or concave).
- the routes are usually delimited by corners in the route.
- the corners can also be rounded.
- the section is designed to be rotationally symmetrical with respect to an axis of rotation.
- the route can in particular be 2n rotationally symmetrical with respect to an axis of rotation, where n is a number> 3.
- the polygon geometry can be designed as a regular hexagon, octagon, etc.
- the case base has an opening for receiving the primer cap.
- a base part with the aforementioned features can be designed in such a way that it is suitable as an assembly part for producing a cartridge case. However, it can also be designed in such a way that the cartridge case can be produced from it in one part by means of a further shaping process.
- a cartridge case with a cylindrical case which has a case opening for receiving a propellant charge and a projectile, as well as a base part according to the invention opposite the case opening.
- the cylindrical sleeve and the base part can be formed in one piece. However, it can also be the case that the cylindrical sleeve and the base part are firmly connected by means of a joining technique.
- the bottom part can, for example, be welded to the sleeve.
- a method for producing a cartridge case is proposed, with a cylindrical case which has a case opening for receiving a propellant charge and a projectile, as well as a the case opening opposite bottom section with a case bottom for receiving a primer cap, with the following steps:
- the proposed method provides an integrally formed cartridge case.
- the starting body can already have a cylindrical sleeve before the circumferential extractor recess is produced. However, it can also be the case that the cylindrical sleeve is only formed after the extraction recess has been produced.
- a method for producing a base part for a cartridge case which has a case base for receiving a primer cap, with the following steps:
- the proposed variant of the method provides a base part which is particularly suitable for producing multi-part cartridge cases in which the base part is joined to a case.
- the term “starting body” is to be understood generally. It is a metallic body, which can be, for example, a wire section with a cylindrical outer circumference.
- the starting body can, however, also be a shaped body which has already been reshaped or processed by means of machining processes.
- the starting body can already have an opening for receiving the primer cap.
- the polygon geometry is produced on the basis of a cylindrical starting body by means of a forming process or a machining process.
- the polygon geometry can be produced in a simplified manner by means of a forming process.
- the polygon geometry is expediently embossed in an outer circumference of the starting body. It has proven to be particularly advantageous to produce the polygon geometry steps using several forming steps.
- a first polygon geometry is advantageously embossed into the outer circumference of the starting body, and in a second reshaping step, a second polygon geometry that overlaps the first polygon geometry in sections is embossed.
- a first polygon geometry is embossed into the outer circumference of the floor blank in a first forming step. This can be done with a relatively simple forming tool.
- a second polygonal geometry that at least partially overlaps the first polygonal geometry is embossed into the first polygonal geometry.
- the second forming step can also be carried out with a simply designed forming tool.
- the number of lines or polygonal lines is expediently increased compared to the first forming step.
- the first polygon geometry can be 6-fold rotationally symmetrical with respect to an axis of rotation.
- the second polygon geometry can be 12 or 24 times rotationally symmetrical with respect to an axis of rotation.
- the first edges produced in the first forming step are at least partially overprinted in the second forming step.
- first edges after the first forming step can have a ridge or the like. Since the first edges produced in the first deformation step are at least partially embossed in the second deformation step, a polygonally shaped pull-out recess can be produced with high geometric precision in a simple and inexpensive manner.
- a two-part or multi-part forming tool is expediently used to produce the polygon geometries. In general, a simply designed 2, 3 or 4-part forming tool is sufficient. Multi-part forming tools, e.g. B. 8-, 9- or 10-part forming tools can be used.
- the starting body after the first forming step and before the second forming step, can be rotated axially by a predetermined angle relative to the forming tool.
- the output body can be rotated relative to the stationary forming tool or the forming tool can be rotated relative to the stationary output body.
- the first forming step to place the starting body in a second forming tool which, with regard to the polygon geometry, is rotated by a predetermined angle relative to the polygon geometry provided in the first forming tool.
- the edges of the second polygon geometry lie at least partially on the lines of the first polygon geometry.
- first and the second polygon geometry with the same forming tool.
- two identical forming tools can be used one after the other to produce the first and second polygon geometry.
- it is expediently rotated by a predetermined angle and then placed in the next following forming tool to produce the second polygon geometry.
- the first polygon geometry is produced by means of a first forming tool and the second polygon geometry is produced by means of a second forming tool different from the first forming tool.
- a first polygon geometry that is six-fold rotationally symmetrical with respect to an axis of rotation can be produced with the first forming tool.
- a second polygon geometry can be produced which is, for example, 12-fold rotationally symmetrical with respect to an axis of rotation.
- the first polygon geometry can be overprinted by the second polygon geometry in such a way that the first edges of the first polygon geometry coincide with second edges of the second polygon geometry.
- At least one tool can be inserted into the starting body and / or attached to the outer circumference of the starting body during the forming process.
- the tool can hold, index, punch, fill, shape and / or shape the starting body. In this way, the dimensional accuracy in the manufacture of the base part can be improved.
- the base part or the cartridge case can also be produced from a further starting body having the polygon geometry by means of a forming process.
- the polygon geometry of the extractor recess is predetermined by the further starting body.
- the further starting body is reshaped in such a way that a cylindrical outer circumference is formed, in which the pull-out recess remains with the polygon geometry.
- the opening for receiving the primer cap can be made before, during or after the production of the polygon geometry in the case base.
- the polygon geometry is expediently 2n rotationally symmetrical with respect to an axis of rotation, where n is a number> 3.
- the polygon geometry of the extractor recess can, for example, be rotationally symmetrical about an axis of rotation 6-, 8-, 10-, 12-fold.
- a method for producing a cartridge case is proposed, with a cylindrical case which has a case opening for receiving a propellant charge and a projectile, as well as a base part opposite the case opening with a case base for receiving a priming cap, with the following steps:
- the proposed method provides a cartridge case in which the base part and the case are formed in one piece.
- the cylindrical sleeve can also be molded on by means of extrusion and deep drawing.
- At least one tool can be inserted into the base part and / or attached to the outer circumference of the base part.
- the tool can act on the base part and / or the sleeve in a holding, indexing, perforating, filling, stamping and / or shaping manner.
- a cartridge case manufactured according to the above process can be manufactured exclusively by means of forming and can therefore be manufactured particularly efficiently.
- a method for producing a cartridge case is also proposed, with a cylindrical case which has a case opening for receiving a propellant charge and a projectile, as well as a base part opposite the case opening with a case base for receiving a percussion cap, with the following steps:
- the joining process can be, for example, a welding process or other suitable processes.
- the starting body and / or the sleeve is advantageously made from a non-ferrous metal or steel.
- the non-ferrous metal can be selected from the following group: brass, aluminum or aluminum alloy.
- Fig. 1 is a perspective view of an output body
- FIG. 2 is a sectional view according to FIG. 1,
- FIG. 4 shows an enlarged view according to FIG. 3,
- FIG. 5 shows a second sectional view of the first forming tool according to FIG. 3;
- FIG. 6 shows an enlarged view according to FIG. 5,
- FIG. 7 shows a perspective view of a first shaped sleeve body
- FIG. 8 shows a sectional view according to FIG. 7,
- FIG. 12 shows an enlarged view according to FIG. 11,
- FIG. 13 shows a side view of the first shaped sleeve body according to FIG. 7 with the first forming tool open
- FIG. 14 shows a side view of a second shaped sleeve body with the second forming tool open
- FIG. 16 shows a side view of a second shaped sleeve body
- FIG. 17 shows a sectional view along the section line A - A in FIG. 16, 18 shows a cross-sectional view according to the section line B - B in FIG. 16,
- FIG. 19 shows a perspective view according to FIG. 16,
- FIG. 21 shows a perspective view of a first forming tool in the open state and of a first shaped sleeve body
- FIG. 22 shows a perspective view according to FIG. 21, the first forming tool being closed
- FIG. 24 shows a perspective view of a second forming tool in the open state and of a second shaped sleeve body
- FIG. 25 shows a perspective view of the second forming tool in the closed state
- 26 shows a perspective sectional view of a second mold cavity of the second forming tool in the closed state.
- a starting body for producing a cartridge case instead of the starting body for producing a cartridge case, a starting body for producing the base part can also be provided and the base part can be produced therefrom using an analogous method. Such a base part can be joined to a cartridge case with a case.
- Fig. 1 shows a perspective view of an output body 1 for the production of a cartridge case, which in one piece z. B. is made by extrusion or extrusion and deep drawing.
- the output body 1 has a cylindrical sleeve 2 which has a sleeve opening 3 and a sleeve bottom 4 opposite the sleeve opening 3.
- the case base 4 has an opening 5 for receiving a primer cap (not shown here). With the The broken line indicates a bottom section.
- the base section can be formed from a separate base part T.
- a first forming tool 6 here consists of two first mold halves 6a, 6b. As can be seen in particular from FIGS. 5, 6, 21 and 23, the first forming tool 6 is of relatively simple design. In the area of its first mold cavity K1, it has first projections 7 (see FIG. 23) for embossing a first polygon geometry P1 into the sleeve base 4.
- the first polygon geometry P1 is a 6-fold rotationally symmetrical polygon geometry with respect to an axis of rotation.
- a polygon geometry as it is e.g. B. shown in FIGS. 5 and 6 in cross section, is formed by a closed route. The routes are limited by corners. The routes are just developed here.
- FIGS. 7, 8 and 13 show a first shaped sleeve body F1, i. H. the starting body after the first forming step.
- the first polygon geometry P1 embossed in the sleeve base 4 has first polygon surfaces 10 which are each delimited in the circumferential direction by first edges 11.
- 9 to 12 and 24 to 26 show the production of a second polygon geometry P2 in a second forming step.
- the first molded sleeve body F1 is inserted into a second forming tool 8, which, like the first forming tool 6, consists of two second mold halves 8a,
- the second forming tool 8 has a second mold cavity K2 with second projections 9 (see FIG. 26), which is rotationally symmetrical about an axis of rotation P26 in order to produce the second polygon geometry P26 .
- the second projections 9 are rotated relative to the first projections 7 by about 30 degrees.
- the first molded sleeve body F1 is inserted into the second molding tool 8 in such a way that first edges 11 of the first polygon geometry P1 are located approximately in the middle of a straight section of the second projections 9.
- the first polygon geometry P1 is overprinted with a second polygon geometry P2 (see FIG. 12).
- the result is a second shaped sleeve body F2 with a second polygon geometry P2, which is 12-fold rotationally symmetrical (see FIGS. 16 to 19).
- the second polygon geometry P2 has second polygon areas 12 which are delimited in the circumferential direction by second edges 13 (see FIG. 14).
- further deformation steps can take place in order to produce a polygon geometry.
- the second molded sleeve body F2 can be rotated by a predetermined angular amount relative to the second molding tool 8 and subsequently reshaped in a third reshaping step. Further forming steps can be carried out in a similar manner.
- FIG. 13 shows the first molded sleeve body F1 with the first mold 6 open.
- FIG. 14 shows the second molded sleeve body F2 in an analogous manner with the second mold 8 open.
- a tool (not shown here) can be run into the sleeve 2 and / or the opening 5.
- a tool (not shown here) can also be placed on the outer circumference of the starting body or the shaped sleeve body. In this way, undesired deformation, in particular the formation of folds or the like, within the sleeve 2 and / or the opening 5 can be avoided.
- the arrows indicate that the tool can hold, fill, shape or shape.
- FIG. 20 shows a third shaped sleeve body F3, which has a third polygon geometry P3.
- the third polygon geometry P3 can, for. B. be produced by the first polygon geometry P1 is embossed with a second polygon geometry P2, which is not congruent with the first polygon geometry P1 and moreover is adjusted relative to the first polygon geometry P1 by a predetermined angle.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RS20230546A RS64361B1 (en) | 2020-06-23 | 2021-06-09 | Base part for producing a cartridge case and cartridge case, method for producing a base part for a cartridge case, and method for producing a cartridge case |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020003744.5A DE102020003744A1 (en) | 2020-06-23 | 2020-06-23 | Base part for producing a cartridge case and cartridge case, method for producing a base part for a cartridge case and method for producing a cartridge case |
PCT/EP2021/065502 WO2021259643A1 (en) | 2020-06-23 | 2021-06-09 | Base part for producing a cartridge case and cartridge case, method for producing a base part for a cartridge case, and method for producing a cartridge case |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3986633A1 true EP3986633A1 (en) | 2022-04-27 |
EP3986633B1 EP3986633B1 (en) | 2023-06-07 |
EP3986633C0 EP3986633C0 (en) | 2023-06-07 |
Family
ID=76502708
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21733079.4A Active EP3986633B1 (en) | 2020-06-23 | 2021-06-09 | Base part for producing a cartridge case and cartridge case, method for producing a base part for a cartridge case, and method for producing a cartridge case |
Country Status (8)
Country | Link |
---|---|
US (1) | US20230124564A1 (en) |
EP (1) | EP3986633B1 (en) |
AU (1) | AU2021295229A1 (en) |
CA (1) | CA3186714A1 (en) |
DE (1) | DE102020003744A1 (en) |
ES (1) | ES2952706T3 (en) |
RS (1) | RS64361B1 (en) |
WO (1) | WO2021259643A1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE700207C (en) * | 1937-05-22 | 1940-12-16 | Waffen Und Munitionsfabriken A | Press for forming cartridge sleeve bases with extractor grooves |
DE719783C (en) | 1938-01-04 | 1942-04-16 | William Prym Fa | Process for the production of cartridge cases with ejector groove |
DE732984C (en) | 1940-06-13 | 1943-03-17 | Heinrich Krieghoff | Process for the non-cutting production of the extractor ring groove on the bottom of steel cartridge shells |
US2904873A (en) * | 1956-09-12 | 1959-09-22 | Henry F Hild | Drawn steel cartridge case and its manufacture |
NL169042C (en) | 1979-01-29 | 1982-06-01 | Leer Koninklijke Emballage | METHOD FOR MANUFACTURING A THREADED FLANGE BUSHING BUSH |
US10041770B2 (en) | 2010-11-10 | 2018-08-07 | True Velocity, Inc. | Metal injection molded ammunition cartridge |
EP2690391A1 (en) | 2012-07-24 | 2014-01-29 | METALLWERK ELISENHüTTE GmbH | Method for manufacturing a bullet casing with extractor groove and casing cover |
US9016184B2 (en) | 2012-09-27 | 2015-04-28 | National Machinery Llc | Precision forged cartridge case |
EP2918962B1 (en) * | 2014-03-11 | 2018-04-18 | Schuler Pressen GmbH | Method for producing a cartridge case |
US10495430B2 (en) | 2017-03-07 | 2019-12-03 | National Machinery Llc | Long cartridge case |
-
2020
- 2020-06-23 DE DE102020003744.5A patent/DE102020003744A1/en active Pending
-
2021
- 2021-06-09 WO PCT/EP2021/065502 patent/WO2021259643A1/en unknown
- 2021-06-09 EP EP21733079.4A patent/EP3986633B1/en active Active
- 2021-06-09 CA CA3186714A patent/CA3186714A1/en active Pending
- 2021-06-09 RS RS20230546A patent/RS64361B1/en unknown
- 2021-06-09 AU AU2021295229A patent/AU2021295229A1/en active Pending
- 2021-06-09 ES ES21733079T patent/ES2952706T3/en active Active
-
2022
- 2022-12-21 US US18/085,638 patent/US20230124564A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
ES2952706T3 (en) | 2023-11-03 |
DE102020003744A1 (en) | 2021-12-23 |
RS64361B1 (en) | 2023-08-31 |
EP3986633B1 (en) | 2023-06-07 |
AU2021295229A1 (en) | 2023-01-19 |
CA3186714A1 (en) | 2021-12-30 |
WO2021259643A1 (en) | 2021-12-30 |
EP3986633C0 (en) | 2023-06-07 |
US20230124564A1 (en) | 2023-04-20 |
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