An ammunition body and related production method

Abstract

The invention relates to a artillery ammunition body, ammunition, and a production method. In particular, it relates to the production technologies of artillery shells requiring high precision and mechanical strength and high impact rate, which aim to overcome the technical challenges encountered in the shaping and processing thereof.

Description

[0001] DESCRIPTION

[0002] AN AMMUNITION BODY AND RELATED PRODUCTION METHOD

[0003] Technical Field of the Invention

[0004] The invention relates to a artillery ammunition body, ammunition, and a production method. In particular, it relates to the production technologies of artillery shells requiring high precision and mechanical strength, which aim to overcome the technical challenges encountered in the shaping and processing thereof.

[0005] State of the Art of the Invention

[0006] The production of artillery shells involves significant technical and production challenges due to their high performance requirements. Artillery shells must meet stringent requirements such as mechanical strength, dimensional accuracy, material integrity, and ballistic performance in order to withstand the extreme pressures and temperatures generated during firing while delivering reliable performance in the field.

[0007] The existing artillery and mortar ammunition of different diameters are formed into a cup shape by pulling and forging steel blocks with high tonnage presses using piercing and flow-forming methods. The ogive is then shaped by heating and forging it with heat treatment. After the interior is cleaned by sandblasting, the exterior surface is machined to final dimensions, and finally a copper driving band is mounted by press-fit or welding. An internal thread is cut in the ogive section to allow installation of fuze. After all these operations are completed, the production of the ammunition body is completed by filling the explosive cavity.

[0008] Geometric irregularities and variations in the wall thickness of the ammunition body occurring in these processes also lead to balance problems. If the ammunition is not in perfect form, it is likely to move unstably after firing and to travel along a trajectory different from the intended one. This situation causes the ammunition to fail to reach the target and results in wasted firing. Such a scenario both increases the risk of operational failure and reduces cost efficiency.

[0009] Despite advances in forming technologies, combining punching and flow-forming methods in artillery ammunition remains a complex and resource-intensive process. Current solutions oftenstruggle to maintain a balance between production efficiency, material usage, and quality control, highlighting the need for innovative approaches to overcome these limitations.

[0010] As a result, all the above-mentioned problems have made it imperative to make an innovation in the relevant field.

[0011] Objects and Summary of the Invention

[0012] The main object of the invention relates to a heavy ammunition body which can be produced more rapidly and cost-effectively, and which provides accuracy and high impact on the target with higher balance performance, an ammunition comprising this heavy ammunition body, and a production method thereof.

[0013] The heavy ammunition body of the invention for realizing the objectives above comprises a ogive comprising a mouth in the form of an opening at one end, a connection tube provided in the form of a shell, one end of which is connected to the other end of said ogive, a base plate connected to the connection tube so as to close the bottom of said connection tube, ogive bottom screw threads for connecting said ogive to one end of said connection tube, plate screw threads for connecting said base plate to the other end of said connection tube, and top connection screw threads and bottom connection screw threads for connecting said connection tube with said bottom ogive screw threads and plate screw threads, said coating layer made of a material comprising at least a thermoplastic or thermoplastic alloy and covering at least a part of the circumference of said connection pipe, having at least one channel for the insertion of shrapnel.

[0014] An embodiment of the invention comprises an upper layer having a plurality of support channels extending axially between said coating layer and said ogive and provided longitudinally, a plurality of support shafts provided between said connecting tube and said coating layer and disposed in said support channels, a metal outer body positioned on top of said support coating layer so as to cover at least part of the layer.

[0015] In an embodiment of the invention, said base plate comprises a plurality of recesses extending in an axial direction for accommodating support shafts.

[0016] An embodiment of the invention comprises said support shafts distributed at equal radial intervals about an axis passing through the center of the connection tube.An embodiment of the invention comprises said top layer positioned to contact said ogive and coating layer.

[0017] An embodiment of the invention comprises said top layer positioned at the bottom of said ogive in contact with said ogive flange facing an axial direction.

[0018] An embodiment of the invention comprises multiple outer body parts of the outer jacket provided in the form of a ring.

[0019] An embodiment of the invention comprises said multiple outer jacket parts arranged in the axial direction.

[0020] In an embodiment of the invention, said coating layer consists of a plurality of layers extending in an axial direction and made of a material comprising at least a thermoplastic or a thermoplastic alloy.

[0021] An embodiment of the invention comprises said multiple layers which, when combined, provide the cylindrical geometry.

[0022] An embodiment of the invention comprises said multiple layers whose channels, when combined, form continuous channels with the channels of the next layer.

[0023] An embodiment of the invention comprises said screw threads extending circumferentially along the inner diameter of said mouth part.

[0024] An embodiment of the invention comprises said ogive, the end of which that connects with the connection tube is formed as a bottom opening and which includes screw threads extending circumferentially within the said bottom opening, and the said connection tube comprises screw threads that connect with the screw threads extending circumferentially in said bottom opening.

[0025] An embodiment of the invention comprises said base plate, the end of which that connects with the connection tube includes screw threads extending circumferentially, and said connectiontube comprises screw threads that connect with the screw threads extending circumferentially on the base plate.

[0026] An embodiment of the invention comprises more than one said channel.

[0027] An embodiment of the invention comprises said channel, at least a part of which extending parallel to the axis along which the connection tube extends.

[0028] An embodiment of the invention comprises said channel, at least part of which extends helically with respect to the center of the axis along which the connection tube extends.

[0029] An embodiment of the invention comprises said channel, at least one end of which opening out of the coating layer.

[0030] An embodiment of the invention comprises said base plate, which is shaped and / or sized to close the end of said channel opening out of the coating layer.

[0031] An embodiment of the invention comprises a base plate flange part such that said base plate is positioned at the open end of the channel.

[0032] An embodiment of the invention comprises said ogive formed and / or sized to close the end of said channel opening out of the coating layer.

[0033] An embodiment of the invention comprises a ogive flange part such that said ogive is positioned at the open end of the channel.

[0034] An embodiment of the invention comprises a driving band coupled to said base plate or connection tube, configured to receive rotational force from the weapon during the firing of the ammunition.

[0035] An embodiment of the invention comprises screw threads on the inner surface of said driving band and screw threads on the base plate that connect with said screw threads.

[0036] An embodiment of the invention comprises said driving band made of copper or alloyed copper.An embodiment of the invention comprises a guide rib ring coupled to said ogive or connection tube, configured to guide the ammunition correctly within the weapon barrel during firing.

[0037] An embodiment of the invention comprises screw threads on the inner surface of said guide rib ring and screw threads on the base plate that connect with said screw threads.

[0038] An embodiment of the invention comprises said ogive, said connection tube, and said base plate made of metal.

[0039] In an embodiment of the invention, said metal is steel or a steel alloy.

[0040] An embodiment of the invention comprises said ogive, connection tube, bourrelet, outer jacket and base plate made of 35-45 Rockwell hardness material.

[0041] In an embodiment of the invention, said thermoplastic is selected from Polyamide 6 (PA6), Polyamide 66 (PA66), Polypropylene (PP), Polycarbonate (PC), Polybutylene Terephthalate (PBT), Acrylonitrile Butadiene Styrene (ABS), Polyacetal (POM), Polyvinyl Chloride (PVC), Polystyrene (PS), General Purpose Polystyrene (GPPS), High Impact Polystyrene (HIPS), Styrene Acrylonitrile (SAN) or mixtures thereof.

[0042] An embodiment of the invention comprises said connection tube having a thickness between 5 and 15 mm.

[0043] An embodiment of the invention comprises said connection tube having a thickness between 7 and 10 mm.

[0044] An embodiment of the invention comprises said coating layer having a thickness between 10-25 mm.

[0045] An embodiment of the invention comprises said coating layer having a thickness between 15-20 mm.A heavy ammunition has been developed to provide the technical benefits described above, this ammunition comprising a heavy ammunition body according to any of the descriptions above, a fuse connected to the mouth, shrapnel placed in said channels, and explosive material placed in the connection tube. A method for producing a heavy ammunition body of the invention in order to achieve the above objects, comprising the steps of

[0046] a) providing a ogive having a mouth part in the form of an opening at one end, a connection tube provided in the form of a shell and a base plate configured to close the bottom part, b) connecting said connection tube to the ogive or base plate by means of screw threads, c) providing a coating layer made of a material comprising at least a thermoplastic or thermoplastic alloy and covering the circumference of the connection tube,

[0047] d) creating channels in said coating layer,

[0048] e) joining the ogive or base plate, which is not yet joined to the connection tube, to the connection tube by means of screw threads.

[0049] An embodiment of the invention comprises the steps of placing the connection tube in an injection mold and forming a coating layer in the injection mold of said mold with a material comprising at least a thermoplastic or a thermoplastic alloy by pressing in order to cover the circumference of the connection tube.

[0050] An embodiment of the invention comprises the steps of

[0051] • installing a top layer with multiple longitudinally provided support channels around the connection tube,

[0052] • placing multiple support shafts around the circumference of the connection tube, with one end inserted into said support channels and the other end pressed against the base plate, • placing an outer body made of metal configured to surround the circumference of the coating layer.

[0053] An embodiment of the invention comprises the steps of placing the obtained structure in an injection mold, wherein the injection mold is configured to form a coating layer covering the circumference of the support shafts and the connection tube, and of pressing a material comprising at least a thermoplastic or thermoplastic alloy into said mold to form a coating layer, and forming channels.In an embodiment of the invention, the channels are produced by in-mold insert method.

[0054] In an embodiment of the invention, the mold for forming the channels is further configured to comprise at least one core for forming the at least one channel in which the shrapnel is to be inserted.

[0055] In an embodiment of the invention, after the coating layer for forming the channels has hardened, the channels are provided by drilling through the coating layer.

[0056] Descriptions of the Drawings Describing the Invention

[0057] The figures and the related descriptions used in order to better describe the device designed with this invention are as follows.

[0058] Fig- 1- Isometric cross-sectional view of the heavy ammunition body of the invention.

[0059] Fig. la. Isometric cross-sectional view of another configuration of the heavy ammunition body of the invention.

[0060] Definitions of the Elements / Features / Parts of the Invention

[0061] In order to better describe the device developed with this invention, the features and parts in the figures are numbered and the equivalent of each number is given below.

[0062] 1. Ammunition body

[0063] 10. Connection tube

[0064] 11. Top connection screw threads

[0065] 12. Bottom connection screw threads

[0066] 20. Ogive

[0067] 21. Bottom ogive screw threads

[0068] 22. Axial extension

[0069] 23. Fuze Mouth

[0070] 24. Ogive Fuze screw threads

[0071] 25. Ogive flange30. Base plate

[0072] 31. Plate screw threads

[0073] 32. Plate flange

[0074] 33. Outer plate screw threads

[0075] 34. Placement surface

[0076] 35. Recess

[0077] 40. Coating layer

[0078] 41. Channel

[0079] 42. Channel exit

[0080] 43. Top layer

[0081] 44. Support channel

[0082] 50. Driving band

[0083] 51. Driving screw threads

[0084] 60. Bourrelet

[0085] 70. Outer jacket

[0086] 71. Outer jacket parts

[0087] 80. Support shafts

[0088] Detailed Description of the Invention

[0089] The invention relates to a military ammunition body, ammunition, and a production method. In particular, it relates to the production technologies of artillery shells requiring high precision and mechanical strength, which aim to overcome the technical challenges encountered in the shaping and processing thereof.

[0090] The present invention relates to a heavy ammunition body (1). The definition of "heavy ammunition" here refers to high caliber artillery shells. Preferably at least 35 mm caliber bullets / ammunition are covered by this term. This term does not include bullets from pistols and similar small arms. The present heavy ammunition body (1) does not include elements that make it ammunition, such as an explosive, a fuse and / or a fuze. However, another subject of the present application is a heavy ammunition that includes elements such as an explosive, a fuse and / or a fuze, in particular an artillery shell.Referring to Figures 1 and la; the present heavy ammunition body (1) comprises a connection tube (10), a ogive (20), and a base plate (30). In addition, the present ammunition further comprises a coating layer (40).

[0091] The connection tube (10) is a tube arranged in the form of a longitudinal shell, preferably with both ends arranged as openings. Preferably, said connection tube (10) is configured in a cylindrical form. Alternatively, different forms for the connection tube (10) may be considered taking into account the weapon to be used.

[0092] The connection tube (10) is then screwed to the ogive (20) and base plate (30), which will be described below. For this reason, the connection tube (10) is provided with screw threads at both ends. Among these screw threads, the screw threads that will ensure the connection with the ogive (20) are called top connection screw threads (11) and the screw threads that will ensure the connection with the base plate (30) are called bottom connection screw threads (12).

[0093] Preferably, the top connection screw threads (11) are provided to extend circumferentially on the inner surface of the connection tube (10) and the bottom connection screw threads (12) are provided to extend circumferentially on the outer surface of the connection tube (10). This arrangement relates to the positions in which the screw threads are provided on said ogive (20) and base plate (30). If the thread positions of these elements change, the positions of the top connection screw threads (11) and the bottom connection screw threads (12) may change. For example, the screw threads of the ogive (20) are arranged to extend circumferentially on its own inner surface, and the top connection screw threads (11) on the outer surface of the connection tube (10). The important part is that these elements also have screw threads that allow them to be screwed together. Here, the pitch of the screw threads is arranged to provide more tightening with the force generated depending on the direction of rotation.

[0094] The connection tube (10) is preferably made of metal, in particular steel or a steel alloy. Preferably, the material has a hardness in the 35-40 Rockwell hardness range. In a practical application, AISI 4140 type steel (42CrMo4) was chosen as the material for the connection tube (10).

[0095] Said connection tube (10) may have a narrower wall thickness than ammunition bodies of the state of the art (ammunition bodies of the same caliber) since a coating layer (40), which willbe described later, surrounds said connection tube (10), increasing the overall wall thickness. Preferably the wall thickness of the connection tube (10) is between 5-15 mm, preferably 7-10 mm.

[0096] Said connection tube (10) is connected to the ogive (20) at one of its two ends. Preferably, the ogive (20) is coaxial with the connection tube (10) and its diameter narrows as it extends from the end connected to the connection tube (10) towards the other end. Bottom ogive screw threads (21) are arranged at the end connected to the connection tube (10). The bottom ogive screw threads (21) are arranged so that they can be screwed together with the top tube connection threads (11). Thus, the two elements can be easily connected to each other.

[0097] Preferably, the bottom ogive screw threads (21) are provided so as to extend circumferentially on the outer surface of the ogive (20) and the top tube connection threads (11) are provided so as to extend circumferentially on the inner surface of the connection tube (10). However, as explained earlier, the opposite is also possible.

[0098] Preferably, at the end of the ogive (20) facing the connection tube (10), an axial extension (22) extending in an axial direction is arranged and the bottom ogive screw threads (21) are provided on the outer surface of said axial extension (22). Accordingly, when the two elements are screwed together, the axial extension (22) enters the interior of said connection tube (10).

[0099] The ogive (20) forms the tip of the present ammunition body (1). When the ammunition body (1) is to be converted into an ammunition, the ogive (20) provides a slot for the insertion of a fuse. Preferably, a fuze mouth (23) is arranged at the tip of the ogive (20). The part extending inward from the fuze mouth (23) is cylindrically arranged, and the top ogive fuze screw threads (24) are arranged here. Here, the top ogive fuze screw threads (24) make it possible to screw the fuze (not shown) into the fuze mouth (23).

[0100] The ogive (20) is preferably made of metal, in particular steel or a steel alloy. Preferably, the material has a hardness in the 35-40 Rockwell hardness range. In a practical application, AISI 4140 type steel (42CrMo4) was chosen as the material for the ogive (20).

[0101] At the other end of the connection tube (10), more precisely at the end where the ogive (20) is not connected, the base plate (30) is placed. The base plate (30) completely covers the end ofthe connection tube (10) to which it is connected. The connection tube (10) of the base plate (30) is screwed to each other. For this reason, the base plate (30) comprises the plate screw threads (31). The plate screw threads (31) and the bottom connection screw threads (12) are arranged so that they can be screwed together. Thus, the two elements can be easily connected to each other.

[0102] Preferably, the plate screw threads (31) are provided so as to extend circumferentially on the inner surface of the base table (30) and the bottom tube connection threads (12) are provided so as to extend circumferentially on the outer surface of the tube connection (10). However, as explained earlier, the opposite is also possible.

[0103] Preferably, a placement surface (34) is arranged on the inner surface of the base plate (30). The placement surface (34) is a planar surface extending in the radial direction. When said connection tube (10) is screwed into the base plate, its tip engages said placement surface (34) and the placement surface (34) restricts the connection tube (10) in the axial direction. Similarly, a ogive flange (25) is provided at the ogive (20), and this ogive flange (25) in turn restricts the connection tube (10) in the opposite axial direction after screwing.

[0104] The base plate (30) is preferably made of metal, in particular steel or a steel alloy. Preferably, the material has a hardness in the 35-40 Rockwell hardness range. In a practical application, AISI 4140 type steel (42CrMo4) was chosen as the material for the base plate (30).

[0105] At least part of the outer circumference of the connection tube (10) is preferably coated with a coating layer (40) over its entire outer surface, which does not interfere with the screw threads. The coating layer (40) is preferably provided with the same geometrical structure as the connection tube (10), in particular in the form of a cylinder. The coating layer (40) was applied by an injection method onto said connection tube (10). The coating layer (40) therefore comprises at least thermoplastics or thermoplastic alloys, preferably the entire material may be selected from thermoplastics or thermoplastic alloys. In addition, fibers, such as glass fibers or carbon fibers, can be added to the thermoplastic material to provide greater strength. Preferably, in an embodiment, the coating layer (40) comprises fibers between 10-25%, in particular between 15-20% by weight.Preferably, said thermoplastic material is selected from Polyamide 6 (PA6), Polyamide 66 (PA66), Polypropylene (PP), Polycarbonate (PC), Polybutylene Terephthalate (PBT), Acrylonitrile Butadiene Styrene (ABS), Polyacetal (POM), Polyvinyl Chloride (PVC), Polystyrene (PS), General Purpose Polystyrene (GPPS), High Impact Polystyrene (HIPS), Styrene Acrylonitrile (SAN) or mixtures thereof.

[0106] The coating layer (40) and the connection tube (10) made of said thermoplastic material are selected to withstand the heat, pressure, and centrifugal force generated during firing of an ammunition obtained from the ammunition body (1). The required resistance here will vary depending on the weapon to be fired, the caliber of the ammunition, and the propellant charge to be used. The necessary arrangement can be determined within the above parameters without creating an unnecessary burden of experimentation for the person skilled in the art.

[0107] In a preferred embodiment, the coating layer thickness is provided between 10-25 mm, in particular between 15-20 mm.

[0108] At least one, preferably more than one, channel (41) is present in said coating layer (40). These channels (41) form slots for the insertion of shrapnel into the ammunition body (1). Here shrapnel can be provided in the form of balls or cylindrical parts. Preferably, said channels (41) extend coaxially or perpendicularly to the connection tube (10) and are arranged at equal angles and distances around the connection tube. This structure will ensure that the center of gravity remains on the central axis of the ammunition body as a result of the placement of balls or cylindrical parts, and that the balance of the projectile is maintained.

[0109] In addition, the channel (41) or channels (41) can also extend in different geometries. For example, it can be arranged transversely to the axis of said connection tube (10) or completely free. The channel (41) and channels (41) are preferably configured to receive between 600-3000 shrapnel of 4-15 mm, 7-10 mm in diameter.

[0110] The channel (41) or channels (41) are arranged to include at least one channel exit (42) in the production process. Shrapnel is loaded through this channel exit (42). Said channel exit (42) must be closed after filling. Here, the channels (41) can be closed by the plate flange (32) of the bottom plate (30). The channel outlet (42) may be provided at the bottom of the coating layer (40), and wherein the table flange (32) is configured to extend in a radial direction fromthe bottom of the coating layer (40), and this flange closes the channel exit (42). Instead of being arranged in the channel (41), shrapnel can also be grouped during plastic injection using in-mold insert method.

[0111] Alternatively, the channel exit (42) may be arranged at the top of said coating layer (40) and accordingly the radially extending ogive flange (25) of the ogive (20) may be shaped to cover the channel outlet (42). In addition, after filling, it can be closed by being placed at the channel exit with any element.

[0112] Alternatively, one or more of the shrapnel may pass through the coating layer (40) from end to end, completely mounting the base plate (30) and ogive (20) part to each other and providing strength to the coating layer (40).

[0113] With reference to Figure la; In one embodiment of the invention, a top layer (43) is provided between said ogive (20) and the coating layer (40). Here, the top layer (43) is passed through the connection tube (10) and rests against the ogive (20). Here, the top layer (43) also partially surrounds the connection tube (10).

[0114] Preferably, the top layer (43) has a conical structure. The large diameter base of the conical structure rests against the coating layer (40), while the narrow diameter roof rests against the ogive flange (25) facing the axial direction at the bottom of the ogive (20).

[0115] Multiple support channels (44) extending in the axial direction are arranged in the interior of said top layer (43). The support channels (44) are preferably provided at a length that does not reach the ogive (20). The support shafts (40) increase the strength of the structure against forces in both axial and radial directions.

[0116] The top layer (43) is made of metal. Preferably, said metal is steel or steel alloy, in particular made of a material with 35-45 Rockwell hardness. Longitudinal support shafts (80) are inserted into said support channels (44). The support shafts (80) extend towards the base plate (30) and remain on the outside of the connection tube (10). Preferably the support shafts (80) are made of metal.In a preferred embodiment, the support shafts (80) are distributed at equal radial intervals around the axis of the connection tube (10). Thus, the weight of the support shafts (80) is evenly distributed over the ammunition. Preferably 18 support shafts (80) are arranged around the connection pipe (10) as mentioned.

[0117] At least part of the outer circumference of the connection tube (10) is preferably coated with a coating layer (40) over its entire outer surface, which does not interfere with the screw threads. The coating layer (40) is preferably provided with the same geometrical structure as the connection tube (10), in particular in the form of a cylinder. Here, a coating layer (40) provided as a single piece can be used, or a plurality of layer pieces can be used to surround the circumference of the connection tube (10).

[0118] In the case where the coating layer (40) consists of multiple layer pieces, said layer pieces are arranged as curved structures, preferably extending in the axial direction, and accordingly, when said layer piece are joined, a cylindrical structure with a diameter larger than the diameter of the connection tube (10) is formed. Alternatively, ring-shaped layer pieces with a diameter larger than the diameter of the connection tube (10) can be arranged in a row in the axial direction to form the coating layer (40). Preferably, in both geometries, said layer pieces are positioned adjacent to each other.

[0119] The coating layer (40) is preferably applied by an injection method onto said connection tube (10) and support shafts (80). More specifically, the coating layer (40) is obtained by placing the connection pipe (10) and support shafts (80) in a mold and then directly pressing the coating layer (40) thereon using an injection method.

[0120] Alternatively, the coating layer (40) can also be produced individually, then placed onto the support shafts (80) . Here also, a single-piece coating layer (40) can be formed and then positioned onto the support shafts (80), however, it is advantageous for assembly if the layer pieces are produced separately and positioned piece by piece.

[0121] In a preferred embodiment of the invention, a slot (35) extending in an axial direction is provided in the base plate (30). The end of the support shaft (80) fits into said slot (35). Accordingly, the support shaft (80), the base plate (30), the polymer coating (40), and the ogive (20) are mounted on each other.In a preferred embodiment, if the coating layer (40) comprises multiple layer pieces, the channels (41) within the existing layer pieces are configured to form continuous channels (41) when the layer pieces are joined. More specifically, the exit of one of the channels (41) in the layer pieces is connected to the entry of the next layer piece channel (41).

[0122] In addition, instead of being arranged in the channels (41), the shrapnel can be provided inside the groupable channels (41) during the creation of the channel (41) by the in-mold insert method, i.e., during plastic injection.

[0123] Referring to Figures 1 and la; In an embodiment of the invention, a driving band (50) is provided. Preferably, the driving band (50) is a rotating band. Said driving band (50) ensures that the ammunition receives the rotational force from the weapon from which it is fired during firing. Said driving band (50) comprises driving screw threads (51) on its inner surface. The driving band (50) is screwed around the base plate (30). For this purpose, the base plate (30) comprises outer plate screw threads (33) on its outer surface. Said coating layer (40) partially rests on the side surface of the driving band (50). The driving band (50) extends in the radial direction more than the coating layer (40) and is therefore visible as a protrusion on the ammunition body.

[0124] The driving band (50) is preferably made of metal, in particular copper or copper alloy. In a practical application it is made of H58 copper alloy.

[0125] In an alternative embodiment, the driving band (50) can also be positioned on the connection tube (10) if a necessary thread is provided on the surface of the connection tube (10).

[0126] In an embodiment of the invention, a bourrelet (60) is arranged on the connection tube (10). The bourrelet (60) is configured to ensure that the ammunition is guided correctly in the barrel of the weapon during firing. Said bourrelet (60) comprises screw threads (not shown in the figures), bourrelet (60) is screwed around the connection tube (10).

[0127] Referring to Figure la, a metal outer body (70) is positioned at the outermost part of the present ammunition body (1). The outer body (70) is arranged to cover at least part, preferably all, of the coating layer (40).The outer body (70) preferably consists o multiple outer body parts (71). The outer body parts (70) are arranged in the form of rings made of metal and are arranged adjacent to each other in the radial direction to form the outer body (70).

[0128] Said outer body (70) rests against the top layer base (45) provided at the bottom of the top layer (70). It is a surface extending radially from the support channel (44) to the top layer base (45) towards the outer diameter of the top layer (43). Here, the sum of the wall thickness of the coating layer (40) and the wall thickness of the body (70) is preferably equal to the wall thickness of the top layer base (45).

[0129] Preferably, a radially extending surface is provided at the lower end of the coating layer (40), i.e., the end close to the base plate (30). The bottom of the outer body (70) rests on this radially extending surface.

[0130] In a preferred embodiment, the outer body (70) or outer body parts (71) may be made of soft metal material or alloy steel with a hardness of 45-55 Hrc. This choice of material provides extra durability to the coating layer (40), extends its shelflife, and protects it from UV rays. In addition, it provides extra fragmentation effect to the ammunition after the explosion.

[0131] Referring to Figure 1; The heavy ammunition body (1) described above is suitable for a heavy ammunition, in particular a cannon ammunition. The interior of the connection tube (10) of said heavy ammunition body (1) is filled with the appropriate explosive, while the channels (41) are filled with shrapnel. In addition, a fuze (not shown in the figures) is placed at the tip of the ogive (20). Said fuze can be of the following fuze types: detonating before contact, detonating during contact or detonating after contact (e.g., after passing an obstacle). The present ammunition body (1) is suitable for all fuse types. Preferably, the fuze comprises screw threads for attachment and has threads for connecting with the top ogive screw threads (24) at the fuze mouth (23) of the ogive (20).

[0132] The present application also includes a production method for said heavy ammunition body (1). Said production method significantly reduces the time and cost of producing a heavy ammunition body (1).The present method allows the use of the above-described connection tube (10), ogive (20), and base plate (30) in a pre-manufactured form. In addition, the driving band (50) and the bourrelet (50) can also be supplied in a pre-manufactured form. In this case, these elements are produced by die casting and machining. As a result, important parts of the ammunition body (1) are produced with high precision, and the balance of the ammunition is improved.

[0133] Firstly, the connection tube (10) ogive (20) or base plate (30) are screwed together with the screw threads described above. Here, the connection tube (10) is preferably screwed into the ogive (20).

[0134] Referring to Figure la; the top layer (43) is fitted over the connection tube (10). For this, installation can be provided in three different ways. Firstly, the top layer (43) is fitted over the connection tube (10) and the ogive (20) or base plate (30) is screwed onto the connection tube. Secondly, the ogive (20) is first screwed into the connection tube (10) and then the top layer (43) is fitted over the connection tube and rests on said ogive; then the base plate (30) is screwed in. Thirdly, the connection tube (10) and the base plate (30) are first screwed together and the connection tube (10) is passed through, the coating layer (40) is coated by injection method and then the top layer (43) is placed; then the ogive (20) is screwed into the connection tube (10) and the top layer (43) is positioned in contact with the ogive (20).

[0135] After the top layer has been positioned, one end of said support shafts (80) is inserted into the support channels (44) provided in the support layer (43). The other ends of the support shafts (80) are inserted into the base plate (30), preferably in a slot (35) extending in a radial direction provided through the base plate (30).

[0136] Referring to Figures 1 and la; the parts that are screwed together are taken into the mold of an injection molding machine, wherein a fluid thermoplastic or thermoplastic alloy material is pressed into the mold to form said coating layer. The choice of materials that can be used here is given separately in this description.

[0137] Referring to Figure la; As an alternative production, the coating layer (40) is produced in advance in a single piece or in pieces using an injection machine and is fitted around the connection tube (10) and is surrounded by a ring (70) or rings to provide extra strength and increase the shrapnel effect.In both methods, the present heavy ammunition body (1) also needs channels (41) within the coating layer (40). Preferably, said mold is provided with cores in a form suitable for the channels (41) to form the channels (41). Alternatively, after injection has been achieved and the coating layer (40) has hardened, the respective channels (41) can be formed by a drilling process, however, here forming channels with cores is advantageous as it allows the channels (41) to be formed in fewer steps and more quickly.

[0138] In both cases, after forming the coating layer (40) having channels (42), the channels (42) are filled with shrapnel, preferably balls or cylindrical particles. In addition, shrapnel can also be inserted by in-mold insert method, as described above.

[0139] After filling the shrapnel, the other element is inserted into the connection tube (10). The other element here means the base plate (30), if the connection tube (10) and the ogive (20) were screwed together in the first step. In the opposite case, the other element is the ogive (20).

[0140] Preferably, the element (ogive (20) or base plate (30)) which is subsequently connected to the connection tube (10) is shaped such that said channel (41) closes the channel exit (42) for filling shrapnel.

[0141] In a preferred embodiment, the bourrelet (60) is screwed onto the connection pipe (10) beforehand, and then these are screwed onto the ogive (20). Then the injection process is carried out.

[0142] In a preferred embodiment, after the injection has been completed, before the base plate (30) is connected to the connection tube (10), the driving band (50) is connected to the base plate (30) and then the base plate (30) is screwed onto the connection tube (10).

Claims

CLAIMS1. A heavy ammunition body (1), characterized in that it comprises:■ a ogive (20) comprising a fuze mouth (23) in the form of an opening at one end, ■ a connection tube (10) provided in the form of a shell, one end of which is connected to the other end of said ogive (20),■ a base plate (30) connected to the connection tube (10) so as to close the bottom of said connection tube (10),■ ogive bottom screw threads (21) for connecting said ogive (20) to one end of said connection tube (10), plate screw threads (31) for connecting said base plate (30) to the other end of said connection tube (10), and top connection screw threads (11) and bottom connection screw threads (12) for connecting said connection tube (10) with said bottom nose screw threads (21) and plate screw threads (31),■ A coating layer (40) made of a material comprising at least a thermoplastic or thermoplastic alloy and covering at least a part of the circumference of said connection pipe (10), having at least one channel (41) for the insertion of shrapnels.

2. The heavy ammunition body (1) according to claim 1, characterized in that it comprises:a top layer (43) extending axially between said coating layer (40) and the ogive (20) and having multiple support channels (44) provided longitudinally,a plurality of support shafts (80) provided between said connection tube (10) and coating layer and inserted in to said support channels,an outer body (70) made of metal, positioned on said support coating layer (40) so as to cover at least part of the layer.

3. The heavy ammunition body (1) according to claim 2, characterized in that said base plate (30) comprises a plurality of recesses (35) extending in an axial direction to accommodate support shafts (80).

4. The heavy ammunition body (1) according to claim 2 or 3, characterized in that it comprises said support shafts (80) distributed at equal radial intervals about an axis passing through the center of the connection tube (10).

5. The heavy ammunition body (1) according to any one of claims 2-4, characterized in that it comprises said top layer (43) positioned so as to contact said ogive (20) and coating layer (40).

6. The heavy ammunition body (1) according to claim 5, characterized in that it comprises said top layer (43) positioned at the bottom of said ogive (20) in contact with the ogive flange (25) facing the axial direction.

7. The heavy ammunition body (1) according to any one of claims 2-6, characterized in that it comprises multiple or one-piece outer body parts (71) of the outer jacket provided in the form of a ring.

8. The heavy ammunition body (1) according to claim 7, characterized in that it comprises said multiple outer jacket parts (71) arranged in an axial direction.

9. The heavy ammunition body (1) according to any one of the preceding claims, characterized in that said coating layer (40) consists of at least a plurality of layers made of a thermoplastic or thermoplastic alloy material extending in an axial direction.

10. The heavy ammunition body (1) according to claim 9, characterized in that it comprises said multiple layers which, when combined, provide a cylindrical geometry.

11. The heavy ammunition body (1) according to claim 9, characterized in that it comprises said multiple layers whose channels (41), when combined, form continuous channels (41) with the channels (41) of the next layer.

12. The heavy ammunition body (1) according to claim 1, characterized in that it comprises said top ogive fuze screw threads (24) extending circumferentially along the inner diameter of said fuze mouth (23) portion.

13. The heavy ammunition body (1) according to claim 1, characterized in that it comprises:■ said ogive (20), the end of which connected to the connection tube (10) formed as a bottom opening, and having said bottom ogive screw threads (21) extending circumferentially in said bottom opening andsaid top connection screw threads (11) connected to said bottom ogive screw threads (21) extending circumferentially in said base opening of said connection tube (10).

14. The heavy ammunition body (1) according to claim 1 or 13, characterized in that it comprises:■ said base plate (30) comprising said plate screw threads (31) extending circumferentially at the end connected to the connection tube (10) and■ said bottom connection screw threads (12) connected to said plate screw threads (31) extending circumferentially in the base plate (30) of said connection tube (10).

15. The heavy ammunition body (1) according to any one of the preceding claims, characterized in that it comprises a plurality of said channels (41).

16. The heavy ammunition body (1) according to claim 15, characterized in that it comprises said channel (41), at least a part of which extending in parallel to the axis along which the connection tube (10) extends.

17. The heavy ammunition body (1) according to 15, characterized in that it comprises said channel (41), at least a part of which extending helically with respect to the center of the axis along which the connection tube (10) extends.

18. The heavy ammunition body (1) according to any one of claims 1, 15-17, characterized in that it comprises said channel (42) having at least one end opening out of said coating layer (40).

19. The heavy ammunition body (1) according to any one of claims 11, 15-18, characterized in that it comprises said base plate (30) formed and / or sized to close the end of said channel (42) opening out of said coating layer (40).

20. The heavy ammunition body (1) according to claim 19, characterized in that said base plate (30) comprises a base plate flange part (32) to be positioned at the open end of the channel (41).

21. The heavy ammunition body (1) according to any one of claims 11, 15-18, characterized in that it comprises said ogive (20) formed and / or sized to close the end of said channel (41) opening out of said coating layer (40).

22. The heavy ammunition body (1) according to claim 21, characterized in that said ogive (20) comprises a ogive flange part (25) to be inserted into the open end of the channel (41).

23. The heavy ammunition body (1) according to any one of the preceding claims, characterized in that it comprises a rotating band (50) coupled to said base plate (30) or connection tube (10) and configured to receive rotational force from the weapon during the firing of the ammunition.

24. The heavy ammunition body (1) according to claim 23, characterized in that said driving band (50) comprises driving screw threads (51) on the inner surface thereof and outer plate screw thread (33) on the base plate (30) to which said driving screw threads (51) are connected.

25. The heavy ammunition body (1) according to claim 23 or 24, characterized in that it comprises said driving band (50) made of copper.

26. The heavy ammunition body (1) according to any one of the preceding claims, characterized in that it comprises a guide rib ring (60) connected to said ogive (20) or connection tube (10), configured to ensure that the ammunition is guided parallel to the barrel axis in the barrel of the Weapon during firing.

27. The heavy ammunition body (1) according to claim 26, characterized in that it comprises guide screw threads on the inner surface of said bourrelet (60) and external connection threads on said connection tube (10) to which said guide screw threads are connected.

28. The heavy ammunition body (1) according to any one of the preceding claims, characterized in that it comprises a ogive (20), a connection tube (10), and a base plate (30) made of metal.

29. The heavy ammunition body (1) according to claim 28, characterized in that said metal is steel or steel alloy.

30. The heavy ammunition body (1) according to any one of claims 28, 29, characterized in that it comprises said ogive (20), said connection tube (10), and said base plate (30) made of 35- 45 Rockwell hardness material.

31. The heavy ammunition body (1) according to claim 1, characterized in that said thermoplastic is Polyamide 6 (PA6), Polyamide 66 (PA66), Polypropylene (PP), Polycarbonate (PC), Polybutylene Terephthalate (PBT), Acrylonitrile Butadiene Styrene (ABS), Polyacetal (POM), Polyvinyl Chloride (PVC), Polystyrene (PS), General Purpose Polystyrene (GPPS), High Impact Polystyrene (HIPS), Styrene Acrylonitrile (SAN) or mixtures thereof.

32. The heavy ammunition body (1) according to claim 1, characterized in that it comprises said connection tube (10) having a thickness between 5-15 mm.

33. The heavy ammunition body (1) according to claim 1, characterized in that it comprises said connection tube (10) having a thickness between 7-10 mm.

34. The heavy ammunition body (1) according to any one of claims 32-33, characterized in that it comprises said coating layer (40) having a thickness of 10-25 mm.

35. The heavy ammunition body (1) according to any one of claims 32-33, characterized in that it comprises said coating layer (40) having a thickness of 15-20 mm.

36. The heavy ammunition body (1) according to any one of the preceding claims, characterized in that said coating layer (40) is formed such that said screw threads are not covered.

37. The heavy ammunition body (1) according to any one of the preceding claims, characterized in that it comprises ogive bottom screw threads (21), plate screw threads (31), top connection screw threads (11) and / or bottom connection screw threads (12), the tightening directions of which are arranged so as to provide greater tightening with the force generated depending on the direction of rotation of the shot.

38. The heavy ammunition body (1) according to claim 12, characterized in that it comprises said top ogive screw threads (24), the tightening directions of which are arranged so as to provide greater tightening with the force generated depending on the direction of rotation of the shot.

39. A heavy ammunition comprising the heavy ammunition body according to any one of the preceding claims, a fuze connected to the fuze mouth (23), shrapnel inserted in to said channels (41), and an explosive material filled in the connection tube (10).

40. A production method for the heavy ammunition body (1) according to any one of claims 1- 39, characterized by:a) providing a ogive (20) having a fuze mouth (23) in the form of an opening at one end, a connection tube (10) provided in the form of a shell, and a base plate (30) configured to close the bottom part,b) connecting said connection tube (10) to the ogive (20) or base plate (30) by means of screw threads,c) providing a coating layer (40) made of a material comprising at least a thermoplastic or thermoplastic alloy and covering the circumference of the connection tube (10), d) creating channels (41) in said coating layer (40),e) joining the ogive (20) or base plate (30), which is not yet joined to the connection tube (10), to the connection tube (10) by means of screw threads.

41. The method according to claim 40, characterized by placing the connection tube (10) in an injection mold and forming a coating layer in the injection mold of said mold with a material comprising at least a thermoplastic or a thermoplastic alloy by pressing in order to cover the circumference of the connection tube (10).

42. The method according to claim 40, characterized in that it comprises the steps of:o installing a top layer (43) with multiple longitudinally provided support channels (44) around the connection tube (10),o placing multiple support shafts (80) around the circumference of the connection tube (10), with one end inserted into said support channels (44) and the other end pressed against the base plate (30),o placing an outer body (70) made of metal configured to surround the circumference of the coating layer (40).

43. The method according to claim 42, characterized by:placing the obtained structure in an inj ection mold, wherein the inj ection mold is configured to form a coating layer (40) covering the circumference of the support shafts (80) and the connection tube (10), and pressing a material comprising at least a thermoplastic or thermoplastic alloy into said mold to form a coating layer (40), and forming channels (41).

44. The method according to claim 42, characterized in that the channels (41) are produced by an in-mold insert method.

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