A wire-embedding tool and method for embedding metal wire in a propellant charge.
By using a wire-embedding tooling for metal-wire-embedded propellant charges, the problem of metal wire assembly in the manufacturing process of small-diameter, high-aspect-ratio propellant charges was solved, achieving efficient and damage-free metal wire arrangement and improving the quality and efficiency of metal-wire-embedded propellant charges.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAN MODERN CHEM RES INST
- Filing Date
- 2025-10-31
- Publication Date
- 2026-07-31
AI Technical Summary
In the process of manufacturing wire-embedded propellant charges with small diameter and large length-to-diameter ratio, the assembly of the wires is difficult, and it is hard to determine whether the wires are crossed or broken, which affects the processing efficiency.
The wire-embedded propellant cartridge uses a wire-embedded tooling, which includes components such as a wire guiding unit, a propellant casting cylinder, an upper retaining ring, and an upper plate. Through specific structural design and procedures, the wire is guided, temporarily fixed, and positioned to ensure the smooth placement and removal of the wire within a limited space.
It improves the assembly efficiency of metal wire cartridges, ensures the quality of the metal wire, avoids bending or crossing of the metal wire during the assembly process, and enhances product quality and processing efficiency.
Smart Images
Figure CN121408107B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of solid rocket engine manufacturing technology, and relates to wire-embedded propellant grains, specifically to a wire-embedding tooling and method for wire-embedded propellant grains. Background Technology
[0002] With the development of small and medium-sized tactical missile technology, the solid rocket motors of their propulsion devices are required to have high loading characteristics, large thrust, and long operating time. The end-burning metal wire propellant not only meets the high loading requirements of the engine, but also greatly improves the operating time and thrust performance, and is widely used in small and medium-sized engines.
[0003] For wire-embedded propellant charges with a small diameter and a large length-to-diameter ratio, the limited operating space inside the casting cylinder and the small diameter of the wire make it difficult to determine whether there are any abnormalities such as crossing or breakage of the wire during the manufacturing process of the wire-embedded propellant charge, which affects the processing efficiency. Summary of the Invention
[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a wire embedding tooling and method for embedded metal wire propellant, which solves the technical problem that the assembly difficulty of the metal wire in the manufacturing process of embedded metal wire propellant with a small diameter and a large length-to-diameter ratio needs to be further reduced.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A wire-embedding tool for embedding metal wire cartridges includes a base, a metal wire guiding unit coaxially arranged on the top axial direction of the base, a hollow, open-ends-both-axial pouring cylinder coaxially fitted outside the metal wire guiding unit, the bottom axial direction of the pouring cylinder being sealed to the base, the top axial direction of the pouring cylinder being sealed to an upper retaining ring coaxially arranged, and the top axial direction of the upper retaining ring being sealed to an upper plate coaxially arranged.
[0006] The wire guiding unit includes a long tubular wire guiding unit body. Multiple axially penetrating wire grooves are formed on the outer wall of the wire guiding unit body. The multiple wire grooves are evenly distributed circumferentially, and a wire is arranged in each wire groove along the groove direction. A frustum-shaped wire transition guide block is also integrally and coaxially arranged at the axial bottom of the wire guiding unit body. Multiple temporary wire fixing posts are also integrally arranged at the axial top of the wire guiding unit body. The temporary wire fixing posts correspond one-to-one with the wire grooves, and one end of the wire in the wire groove is wound around the temporary wire fixing post.
[0007] The base includes a base body, on which multiple axially penetrating conical molds and wire mounting holes are provided. The conical molds and wire mounting holes correspond one-to-one with the wire passage grooves. Multiple wire first end fixing posts are also integrally provided along the axial bottom of the base body. The wire first end fixing posts correspond one-to-one with the conical molds and wire mounting holes. The other end of the wire in the wire passage groove passes through the conical molds and wire mounting holes and is wound around the wire first end fixing posts.
[0008] The upper retaining ring has a temporary metal wire slot at its axial top, which corresponds one-to-one with the wire guide slot. The temporary metal wire slot temporarily secures one end of the metal wire when the metal wire guide unit is removed from the upper retaining ring.
[0009] The present invention also has the following technical features: Specifically, the upper plate includes an annular upper plate body. Multiple metal wire positioning bosses are integrally arranged radially on the inner side wall of the upper plate body. The multiple metal wire positioning bosses are evenly distributed circumferentially, and each metal wire positioning boss corresponds to a wire groove.
[0010] Each of the aforementioned metal wire positioning bosses is further provided with an axially penetrating metal wire second end positioning groove. The cross-sectional shape of the metal wire second end positioning groove is semi-circular, and the groove depth is greater than or equal to the radius of the metal wire. The central axis of the metal wire second end positioning groove is collinear with the central axis of the conical hole mold and the metal wire mounting hole.
[0011] Each of the aforementioned wire positioning bosses also has an integrally formed second wire end fixing post at its axial top, and the second wire end fixing post is arranged along the axial direction.
[0012] Specifically, the upper retaining ring includes an annular upper retaining ring body, the minimum inner diameter of which is greater than the maximum outer diameter of the metal wire guiding unit.
[0013] The upper retaining ring body has multiple groove-shaped temporary metal wire slots on its axial top. These temporary metal wire slots are evenly distributed circumferentially, and each temporary metal wire slot radially penetrates the upper retaining ring body.
[0014] The width and depth of each temporary slot for the metal wire are both greater than or equal to the outer diameter of the metal wire.
[0015] Specifically, a drug cartridge conical hole mold is coaxially installed inside the conical hole mold and the metal wire mounting hole, and the drug cartridge conical hole mold corresponds one-to-one with the conical hole mold and the metal wire mounting hole.
[0016] The aforementioned conical die for drug cartridges comprises, from top to bottom, an integrated coaxially arranged guide block contact section, a die intermediate section, and a die mounting section. The guide block contact section includes a conical guide block contact section body, and a first through hole for the first end of a metal wire is coaxially opened within the guide block contact section body. The inner diameter of the first through hole for the first end of the metal wire is greater than or equal to the outer diameter of the metal wire.
[0017] The intermediate section of the mold includes a cylindrical intermediate section body. The outer diameter of the intermediate section body is equal to the outer diameter of the axial bottom of the guide block contact section body. The intermediate section body is also coaxially provided with a first end second through hole of a metal wire. The inner diameter of the first end second through hole of the metal wire is equal to the inner diameter of the first end first through hole of the metal wire.
[0018] The mold mounting section includes a cylindrical mold mounting section body. The outer diameter of the mold mounting section body is smaller than the outer diameter of the middle section body of the mold. The axial top of the outer side wall of the mold mounting section body is also installed in the tapered mold and the wire mounting hole through external threads. The mold mounting section body also has a third through hole for the first end of the wire that is axially connected. The inner diameter of the third through hole for the first end of the wire is equal to the inner diameter of the first through hole for the first end of the wire.
[0019] Specifically, the maximum outer diameter of the metal wire guiding unit is smaller than the inner diameter of the pouring cylinder.
[0020] The outer diameter of the axial bottom of the metal wire transition guide block is smaller than the outer diameter of the axial top of the metal wire transition guide block, and the outer diameter of the axial top of the metal wire transition guide block is equal to the outer diameter of the metal wire guide unit body corresponding to the bottom of the wire groove.
[0021] The central axis of the metal wire transition guide block is parallel to the central axis of the plurality of drug cone hole molds, and the axial bottom edge of the metal wire transition guide block contacts the outer wall of the guide block contact section of the plurality of drug cone hole molds.
[0022] Specifically, the width and depth of the wire groove are both greater than the outer diameter of the metal wire.
[0023] This invention also protects a method for embedding a metal wire propellant charge, which is implemented using the embedding fixture for embedding metal wire propellant charges as described above. The method specifically includes the following steps: Step 1: Install multiple drug cartridge conical hole molds into the conical hole molds and wire mounting holes of the base, so that the central axis of the wire transition guide block is parallel to the central axis of the drug cartridge conical hole mold, and the axial bottom edge of the wire transition guide block contacts the outer wall of the multiple guide block contact sections.
[0024] Step 2: Arrange multiple metal wires in the wire guide groove, then stretch one end of each metal wire straight along the wire guide groove to the temporary fixing post at the top of the metal wire guide unit body and temporarily wrap it. Stretch the other end of each metal wire along the wire guide groove and pass it through the first through hole, the second through hole, and the third through hole of the first end of the metal wire in sequence from top to bottom along the axial direction, and finally wrap it around the fixing post of the first end of the metal wire.
[0025] Step 3: Coaxially mount the pouring cylinder to the outside of the wire guide unit, then seal the bottom of the pouring cylinder to the base, and seal the top of the pouring cylinder to the upper retaining ring arranged coaxially.
[0026] Step 4: Remove multiple metal wires from the temporary fixing posts of the metal wire guide unit, stretch the metal wires and lock them into the temporary slots of the upper retaining ring, and then remove the metal wire guide unit axially from the end of the upper retaining ring.
[0027] Step 5: Remove multiple metal wires from the temporary slots of the upper retaining ring, and then pass each metal wire through the positioning slot at the second end of the metal wire from bottom to top along the axial direction. Then, seal the bottom of the upper plate with the top of the upper retaining ring. Finally, straighten the multiple metal wires and wrap them around the fixing post at the second end of the metal wire. This completes the embedding method for the metal wire-embedded drug cartridge.
[0028] Specifically, the number of the plurality of metal wires is 3, 4, or 6.
[0029] Compared with the prior art, the present invention has the following technical effects: (I) The wire embedding tool in this invention solves the problem of limited operating space in the pouring cylinder corresponding to small-diameter embedded metal wire propellant, small metal wire diameter and difficulty in judging the quality of wire laying, improves work efficiency and ensures the quality of embedded metal wire propellant.
[0030] (II) The wire embedding fixture in this invention has a simple structure, which avoids the problems of bending damage or tangling of the metal wire caused by using tools such as tweezers or hooks to hold and guide the metal wire during the assembly process.
[0031] (III) The wire embedding method in this invention is applicable to the assembly process of metal wires in solid rocket motors before casting. This method is simple and easy to operate, solves the technical problem of assembling metal wires in the manufacturing process of metal wire embedding propellant grains with small diameter and large length-to-diameter ratio, improves the assembly efficiency of metal wires, ensures the product quality of metal wire embedding propellant grains, and has good economic and engineering application value. Attached Figure Description
[0032] Figure 1This is a schematic diagram of the overall structure of the wire-embedding tool in this invention.
[0033] Figure 2 This is a schematic diagram of the assembly of the wire guiding unit in the wire inserting fixture of the present invention.
[0034] Figure 3 This is a schematic diagram of the base structure in this invention.
[0035] Figure 4 This is a schematic diagram of the structure of the wire guiding unit in this invention.
[0036] Figure 5 This is a schematic diagram of the axial top of the wire guiding unit in this invention.
[0037] Figure 6 This is a cross-sectional view of the pouring cylinder in this invention.
[0038] Figure 7 This is a schematic diagram of the upper retaining ring in this invention.
[0039] Figure 8 This is a cross-sectional view of the upper retaining ring in this invention.
[0040] Figure 9 This is a schematic diagram of the upper plate in this invention.
[0041] Figure 10 This is a cross-sectional view of the upper plate in this invention.
[0042] Figure 11 This is a schematic diagram of the structure of the cone-shaped mold for the propellant grain in this invention.
[0043] Figure 12 This is a schematic diagram of the axial bottom structure of the cone-shaped die for the propellant grain in this invention.
[0044] Figure 13 This is a cross-sectional view of the cone-shaped mold for the propellant grain in this invention.
[0045] Figure 14 This is a schematic diagram of the overall structure of the metal wire-embedded propellant column in this invention.
[0046] Figure 15 This is a perspective view of the overall structure of the metal wire-embedded drug cartridge in this invention.
[0047] The meanings of the labels in the figure are as follows: 1-base, 2-metal wire guide unit, 3-pouring cylinder, 4-upper retaining ring, 5-upper plate, 6-metal wire, 7-metal wire temporary slot, 8-upper retaining ring body, 9-propellant cone hole mold, 10-propellant propellant, 11-propellant cone hole.
[0048] 101-Base body, 102-Conical hole mold and metal wire mounting hole, 103-Fixing post for the first end of the metal wire.
[0049] 201-Metal wire guide unit body, 202-Wire channel, 203-Metal wire transition guide block, 204-Metal wire temporary fixing post.
[0050] 501 - Upper plate body, 502 - Metal wire positioning boss, 503 - Metal wire second end positioning groove, 504 - Metal wire second end fixing post.
[0051] 901 - Guide block contact section, 902 - Mold middle section, 903 - Mold mounting section, 904 - First through hole at the first end of the metal wire, 905 - Second through hole at the first end of the metal wire, 906 - Third through hole at the first end of the metal wire.
[0052] The specific content of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Detailed Implementation
[0053] It should be noted that, unless otherwise specified, all components and raw materials in this invention are commonly used in the art and are known in the prior art. For example, the metal wire is a known metal wire, and the silver wire is a known silver wire.
[0054] In this invention, a metal wire-embedded propellant with a smaller diameter and a larger length-to-diameter ratio refers to a metal wire-embedded propellant with an outer diameter of less than or equal to 150 mm and a length-to-diameter ratio of greater than or equal to 5.
[0055] Following the above technical solution, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of the present invention fall within the protection scope of the present invention.
[0056] Example 1: This embodiment provides a wire-embedding fixture for embedding metal wire propellant charges, such as... Figures 1 to 10 As shown, the device includes a base 1, a metal wire guide unit 2 coaxially arranged on the top axial direction of the base 1, a hollow pouring cylinder 3 with open ends on both sides coaxially fitted outside the metal wire guide unit 2, the bottom axial direction of the pouring cylinder 3 being sealed to the base 1, the top axial direction of the pouring cylinder 3 being sealed to the upper retaining ring 4 coaxially arranged, and the top axial direction of the upper retaining ring 4 being sealed to the upper plate 5 coaxially arranged.
[0057] like Figure 4 and Figure 5As shown, the wire guiding unit 2 includes a long tubular wire guiding unit body 201. Multiple axially penetrating wire grooves 202 are provided on the outer side wall of the wire guiding unit body 201. The multiple wire grooves 202 are evenly distributed circumferentially. A wire 6 is arranged in each wire groove 202 along the groove direction. A frustum-shaped wire transition guiding block 203 is also integrally and coaxially provided at the axial bottom of the wire guiding unit body 201. Multiple temporary wire fixing posts 204 are also integrally provided along the axial top of the wire guiding unit body 201. The temporary wire fixing posts 204 correspond one-to-one with the wire grooves 202. One end of the wire 6 in the wire groove 202 is wound around the temporary wire fixing post 204.
[0058] like Figure 3 As shown, the base 1 includes a base body 101. The base body 101 has multiple axially penetrating conical molds and wire mounting holes 102. The conical molds and wire mounting holes 102 correspond one-to-one with the wire grooves 202. The bottom of the base body 101 is also integrally provided with multiple wire first end fixing posts 103 along the axial direction. The wire first end fixing posts 103 correspond one-to-one with the conical molds and wire mounting holes 102. The other end of the wire 6 in the wire grooves 202 passes through the conical molds and wire mounting holes 102 and is wound around the wire first end fixing posts 103.
[0059] like Figure 7 and Figure 8 As shown, a temporary wire slot 7 is provided on the axial top of the upper retaining ring 4. The temporary wire slot 7 corresponds one-to-one with the wire guide slot 202. The temporary wire slot 7 temporarily secures one end of the metal wire 6 when the metal wire guide unit 2 is taken out from the upper retaining ring 4.
[0060] In this embodiment, the sealing connection methods used in the following ways are commonly known in the art: the bottom of the pouring cylinder 3 is sealed to the base 1; the top of the pouring cylinder 3 is sealed to the upper retaining ring 4 arranged coaxially; and the top of the upper retaining ring 4 is sealed to the upper plate 5 arranged coaxially.
[0061] In this embodiment, the number of metal wires 6 is 3; the metal wires 6 are silver or copper wires with a diameter of 0.15mm to 0.4mm; the silver or copper wires are commonly used in the art. In this embodiment, it is further preferred that the metal wires 6 are silver wires with a diameter of 0.2mm.
[0062] In this embodiment, the material of the wire guiding unit 2 is aluminum, and the aluminum material used is a commonly known aluminum material in the art. The diameter of the three temporary wire fixing posts 204 in the wire guiding unit 2 is 2mm to 3mm, and they are used to temporarily wind the metal wire 6. The cross-section of the three wire guide grooves 202 in the wire guiding unit 2 is arc-shaped, and the groove width of the three wire guide grooves 202 is 5mm, and the groove depth is 3mm. The three wire guide grooves 202 are used to axially guide the metal wire 6 and temporarily wind the metal wire 6 onto the temporary wire fixing posts 204. In this embodiment, it is further preferred that the diameter of the three temporary wire fixing posts 204 is 2mm.
[0063] In this embodiment, the wire guiding unit 2 serves to guide, temporarily wind and fasten the wire 6, and needs to be removed from the inside of the pouring cylinder 3 before assembling the upper plate 5.
[0064] In this embodiment, the base 1 is made of aluminum, specifically aluminum, a material commonly known in the art. Three wire end fixing posts 103 with a diameter of 2mm to 3mm are integrally formed on the base 1. Each wire end fixing post 103 is positioned close to its corresponding cartridge cone mold 9. Preferably, in this embodiment, the diameter of each of the three wire end fixing posts 103 is 2mm.
[0065] In this embodiment, the material of the casting cylinder 3 is aluminum, specifically a commonly used aluminum material known in the art. The axial bottom of the casting cylinder 3 is sealed to the base 1, and the axial top of the casting cylinder 3 is sealed to the coaxially arranged upper retaining ring 4, thereby forming a circumferentially closed casting space. The inner diameter of the casting cylinder 3 is equal to the outer diameter of the required embedded metal wire propellant. In this embodiment, the preferred outer diameter of the embedded metal wire propellant is 60 mm.
[0066] As a preferred embodiment of this invention, such as Figure 9 and Figure 10 As shown, the upper plate 5 includes an annular upper plate body 501. Multiple metal wire positioning bosses 502 are integrally arranged radially on the inner side wall of the upper plate body 501. The multiple metal wire positioning bosses 502 are evenly distributed circumferentially, and the metal wire positioning bosses 502 correspond one-to-one with the wire grooves 202.
[0067] Each wire positioning boss 502 is also provided with an axially penetrating wire second end positioning groove 503. The cross-sectional shape of the wire second end positioning groove 503 is semi-circular. The groove depth of the wire second end positioning groove 503 is greater than or equal to the radius of the wire 6. The central axis of the wire second end positioning groove 503 is collinear with the central axis of the tapered hole mold and the wire mounting hole 102.
[0068] Each wire positioning boss 502 is also integrally provided with a second wire end fixing post 504 at its axial top, and the second wire end fixing post 504 is arranged along the axial direction.
[0069] In this embodiment, the upper plate 5 is made of aluminum, a commonly used aluminum material known in the art; the through hole between the inner cavity of the upper plate body 501 and the three metal wire positioning bosses 502 is used for casting the propellant grain 10; the diameter of the three metal wire second end fixing posts 504 of the upper plate 5 is 2mm to 3mm, used for winding the metal wire 6; the inner diameter of the three metal wire second end positioning grooves 503 in the upper plate 5 is 1mm, used for axial positioning of the metal wire 6. In this embodiment, it is further preferred that the diameter of the three metal wire second end fixing posts 504 is 2mm.
[0070] As a preferred embodiment, the upper retaining ring 4 includes an annular upper retaining ring body 8, the minimum inner diameter of the upper retaining ring body 8 being greater than the maximum outer diameter of the wire guiding unit 2.
[0071] The upper retaining ring body 8 has multiple groove-shaped temporary metal wire slots 7 on its axial top. The multiple temporary metal wire slots 7 are evenly distributed along the circumference, and each temporary metal wire slot 7 penetrates the upper retaining ring body 8 radially.
[0072] The width and depth of each temporary slot 7 for metal wires are greater than or equal to the outer diameter of the metal wire 6.
[0073] In this embodiment, the upper retaining ring 4 is made of aluminum, a commonly used aluminum material known in the art. The three temporary wire slots 7 on the upper retaining ring 4 have a width of 1mm to 2mm and a depth of 2mm to 3mm, used for temporary fixing of the wires 6 when removing the wire guide unit 2, to prevent the wires 6 from crossing circumferentially. After the upper retaining ring 4 is installed between the upper retaining ring 4 and the axial top of the pouring cylinder 3, the three wires 6 are removed from the temporary wire fixing posts 204 and respectively secured in the temporary wire slots 7, ensuring that the wires 6 are separated from the wire guide unit 2 before the wire guide unit 2 is removed axially from the upper retaining ring 4. In a further preferred embodiment, the width of each of the three temporary wire slots 7 is 1.5mm and the depth is 2mm.
[0074] As a preferred embodiment of this invention, such as Figures 11 to 13 As shown, a drug cartridge conical hole mold 9 is coaxially installed inside the conical hole mold and the metal wire mounting hole 102, and the drug cartridge conical hole mold 9 corresponds one-to-one with the conical hole mold and the metal wire mounting hole 102.
[0075] The conical die 9 includes, from top to bottom along the axial direction, an integrated coaxially arranged guide block contact section 901, a die intermediate section 902, and a die mounting section 903. The guide block contact section 901 includes a conical guide block contact section body. A first through hole 904 for the first end of a metal wire is coaxially opened in the guide block contact section body. The inner diameter of the first through hole 904 for the first end of the metal wire is greater than or equal to the outer diameter of the metal wire 6.
[0076] The intermediate section 902 of the mold includes a cylindrical intermediate section body. The outer diameter of the intermediate section body is equal to the outer diameter of the axial bottom of the guide block contact section body. The intermediate section body is also coaxially provided with a first end second through hole 905 of a metal wire. The inner diameter of the first end second through hole 905 of the metal wire is equal to the inner diameter of the first end first through hole 904 of the metal wire.
[0077] The mold mounting section 903 includes a cylindrical mold mounting section body. The outer diameter of the mold mounting section body is smaller than the outer diameter of the middle section body of the mold. The axial top of the outer side wall of the mold mounting section body is also installed in the tapered mold and the wire mounting hole 102 through an external thread. The mold mounting section body is also coaxially provided with an axially penetrating third through hole 906 for the first end of the wire. The inner diameter of the third through hole 906 for the first end of the wire is equal to the inner diameter of the first through hole 904 for the first end of the wire.
[0078] In this embodiment, the propellant cone hole mold 9 enables the axial bottom of the propellant grain 10 to form a propellant cone hole 11 after casting and demolding.
[0079] In this embodiment, the material of the drug cartridge conical die 9 is copper, and the copper material is a commonly known copper material in the art. The cone angle of the drug cartridge conical die 9 is determined according to the speed increase ratio, and the cone angle is usually 20° to 40°. In this embodiment, a more preferred cone angle is 30°. The drug cartridge conical die 9 has a first through hole 904, a second through hole 905, and a third through hole 906 with an inner diameter of 0.5mm to 1mm for the passage of the metal wire 6. In this embodiment, a more preferred embodiment is that the inner diameter of the first through hole 904, the second through hole 905, and the third through hole 906 are all 1mm.
[0080] As a preferred embodiment, the maximum outer diameter of the wire guiding unit 2 is smaller than the inner diameter of the pouring cylinder 3.
[0081] The outer diameter of the axial bottom of the metal wire transition guide block 203 is smaller than the outer diameter of the axial top of the metal wire transition guide block 203, and the outer diameter of the axial top of the metal wire transition guide block 203 is equal to the outer diameter of the metal wire guide unit body 201 corresponding to the bottom of the wire groove 202.
[0082] The central axis of the wire transition guide block 203 is set parallel to the central axis of the multiple drug cone hole molds 9, and the axial bottom edge of the wire transition guide block 203 contacts the outer wall of the guide block contact section 901 of the multiple drug cone hole molds 9.
[0083] In this embodiment, the other end of the metal wire 6 in the wire groove 202 is guided by the metal wire transition guide block 203 and passes through the first through hole 904, the second through hole 905 and the third through hole 906 of the first end of the metal wire in sequence from top to bottom along the axial direction, and finally wraps around the first end fixing post 103 of the metal wire.
[0084] In this embodiment, the wire transition guide block 203 can facilitate the smooth transition of the wire 6 from the wire guide unit 2 through the wire groove 202 to the first end of the first perforation 904 of the drug cone die 9.
[0085] As a preferred embodiment, the width and depth of the wire groove 202 are both greater than the outer diameter of the metal wire 6.
[0086] In this embodiment, the manufacturing process of the wire-embedded propellant grain is as follows: first, the wire-embedding fixture and the metal wire 6 are installed; then, the propellant grain 10 is cast; and finally, after demolding, the wire-embedded propellant grain is obtained. In this embodiment, the cavity formed by the interior of the casting cylinder 3, the axial top of the base 1, and the axial bottom of the upper plate 5 is used for casting the propellant grain 10.
[0087] The wire-embedded propellant grain assembly in this embodiment is used for the assembly of the wires in the propellant grain assembly process before propellant casting. For example... Figure 14 and Figure 15 As shown, the wire-embedded propellant grain is a solid end-burning structure, consisting of a propellant grain 10 and a metal wire 6. The purpose of embedding the metal wire 6 into the propellant grain 10 is to increase the burning rate of the propellant along the metal wire 6, thereby increasing the burning surface of the propellant grain 10. To shorten the equilibrium burning surface establishment time of the wire-embedded propellant grain, a conical hole structure is provided at one end of the propellant grain, and the conical hole is guaranteed by the propellant grain conical hole mold 9. The wire-embedded propellant grain adopts a commonly known type in the art, the metal wire 6 adopts a commonly known type in the art, and the propellant adopts a commonly known type in the art.
[0088] Example 2: A method for embedding a metal wire in a propellant charge, which is implemented using the embedding fixture for metal wire induction charge as described in Example 1, specifically includes the following steps: Step 1: Install multiple cone-shaped die molds 9 into the cone-shaped die mold and wire mounting hole 102 of the base 1, so that the central axis of the wire transition guide block 203 is parallel to the central axis of the cone-shaped die mold 9, and the axial bottom edge of the wire transition guide block 203 contacts the outer wall of the multiple guide block contact sections 901.
[0089] Step 2: Arrange multiple metal wires 6 in the wire guide groove 202 respectively. Then, stretch one end of the multiple metal wires 6 straight along the wire guide groove 202 to the metal wire temporary fixing post 204 at the top of the metal wire guide unit body 201 and temporarily wrap it. Stretch the other end of the multiple metal wires 6 along the wire guide groove 202 and pass it through the first end hole 904, the second end hole 905 and the third end hole 906 of the first end of the metal wire in sequence from top to bottom along the axial direction. Finally, wrap it around the first end fixing post 103 of the metal wire.
[0090] Step 3: Coaxially mount the pouring cylinder 3 onto the outside of the wire guide unit 2, then seal the bottom of the pouring cylinder 3 with the base 1, and seal the top of the pouring cylinder 3 with the coaxially arranged upper retaining ring 4.
[0091] Step four: Remove multiple metal wires 6 from the temporary metal wire fixing post 204 of the metal wire guiding unit 2, stretch the metal wires 6 and lock them into the temporary metal wire slot 7 of the upper retaining ring 4, and then remove the metal wire guiding unit 2 axially from the end of the upper retaining ring 4.
[0092] Step 5: Remove multiple metal wires 6 from the temporary metal wire slots 7 of the upper retaining ring 4, and then pass multiple metal wires 6 through the second end positioning slot 503 of the metal wire from bottom to top along the axial direction. Then, seal the bottom of the upper plate 5 with the top of the upper retaining ring 4. Finally, straighten the multiple metal wires 6 and wrap them around the second end fixing post 504 of the metal wire. This completes the embedding method for embedding metal wire darts.
[0093] As a preferred embodiment, the number of the plurality of metal wires 6 is 3, 4 or 6.
[0094] In this embodiment, the number of metal wires 6 is 3.
Claims
1. A wire-embedding tool for embedding metal wire propellant charges, characterized in that, Includes a base (1), a metal wire guide unit (2) is coaxially arranged on the top of the base (1), a hollow internal pouring cylinder (3) with open ends on both sides is coaxially fitted outside the metal wire guide unit (2), the bottom of the pouring cylinder (3) is sealed to the base (1), the top of the pouring cylinder (3) is sealed to the upper retaining ring (4) arranged coaxially, and the top of the upper retaining ring (4) is sealed to the upper plate (5) arranged coaxially. The wire guiding unit (2) includes a long tubular wire guiding unit body (201). Multiple axially penetrating wire grooves (202) are provided on the outer side wall of the wire guiding unit body (201). The multiple wire grooves (202) are evenly arranged in the circumferential direction. A wire (6) is arranged in each wire groove (202) along the groove direction. A frustum-shaped wire transition guide block (203) is also integrally and coaxially provided at the axial bottom of the wire guiding unit body (201). Multiple temporary wire fixing posts (204) are also integrally provided in the axial top of the wire guiding unit body (201). The temporary wire fixing posts (204) correspond one-to-one with the wire grooves (202). One end of the wire (6) in the wire groove (202) is wound around the temporary wire fixing post (204). The base (1) includes a base body (101), on which a plurality of axially penetrating conical molds and wire mounting holes (102) are provided. The conical molds and wire mounting holes (102) correspond one-to-one with the wire grooves (202). At the bottom of the base body (101) along the axial direction, a plurality of wire first end fixing posts (103) are integrally provided. The wire first end fixing posts (103) correspond one-to-one with the conical molds and wire mounting holes (102). The other end of the wire (6) in the wire grooves (202) passes through the conical molds and wire mounting holes (102) and is wound around the wire first end fixing posts (103). The upper retaining ring (4) has a metal wire temporary slot (7) on its axial top. The metal wire temporary slot (7) corresponds one-to-one with the wire passage (202). The metal wire temporary slot (7) temporarily fastens one end of the metal wire (6) when the metal wire guide unit (2) is taken out from the upper retaining ring (4). The cone hole mold and the wire mounting hole (102) are coaxially installed with a drug cone hole mold (9), and the drug cone hole mold (9) corresponds one-to-one with the cone hole mold and the wire mounting hole (102); The aforementioned conical die (9) includes, from top to bottom along the axial direction, an integrated coaxially arranged guide block contact section (901), a die middle section (902), and a die mounting section (903); the guide block contact section (901) includes a conical guide block contact section body, and a first through hole (904) for the first end of a metal wire is coaxially opened in the guide block contact section body, and the inner diameter of the first through hole (904) for the first end of the metal wire is greater than or equal to the outer diameter of the metal wire (6); The intermediate section (902) of the mold includes a cylindrical intermediate section body. The outer diameter of the intermediate section body is equal to the outer diameter of the bottom of the guide block contact section body. The intermediate section body is also coaxially provided with a first end second through hole (905) of a metal wire. The inner diameter of the first end second through hole (905) of the metal wire is equal to the inner diameter of the first end first through hole (904) of the metal wire. The mold mounting section (903) includes a cylindrical mold mounting section body. The outer diameter of the mold mounting section body is smaller than the outer diameter of the middle section body of the mold. The axial top of the outer side wall of the mold mounting section body is also installed in the tapered mold and the wire mounting hole (102) through an external thread. The mold mounting section body is also coaxially provided with an axially penetrating third through hole (906) at the first end of the wire. The inner diameter of the third through hole (906) at the first end of the wire is equal to the inner diameter of the first through hole (904) at the first end of the wire.
2. The wire-embedding tooling for embedding metal wire propellant charges as described in claim 1, characterized in that, The upper plate (5) includes an annular upper plate body (501). Multiple metal wire positioning bosses (502) are integrally arranged radially on the inner side wall of the upper plate body (501). The multiple metal wire positioning bosses (502) are evenly arranged circumferentially, and the metal wire positioning bosses (502) correspond one-to-one with the wire grooves (202). Each of the aforementioned metal wire positioning bosses (502) is also provided with an axially penetrating metal wire second end positioning groove (503). The cross-sectional shape of the metal wire second end positioning groove (503) is semi-circular. The groove depth of the metal wire second end positioning groove (503) is greater than or equal to the radius of the metal wire (6). The central axis of the metal wire second end positioning groove (503) is collinear with the central axis of the tapered hole mold and the metal wire mounting hole (102). Each of the aforementioned wire positioning bosses (502) is also integrally provided with a second wire end fixing post (504) at its axial top, and the second wire end fixing post (504) is arranged along the axial direction.
3. The wire-embedding tooling for a propellant charge with embedded metal wire as described in claim 1, characterized in that, The upper retaining ring (4) includes an annular upper retaining ring body (8), the minimum inner diameter of the upper retaining ring body (8) being greater than the maximum outer diameter of the metal wire guiding unit (2); The upper retaining ring body (8) has multiple groove-shaped temporary metal wire slots (7) on its axial top. The multiple temporary metal wire slots (7) are evenly distributed along the circumference, and each temporary metal wire slot (7) penetrates the upper retaining ring body (8) radially. The width and depth of each temporary slot (7) for the metal wire are greater than or equal to the outer diameter of the metal wire (6).
4. The wire-embedding tooling for embedding metal wire propellant charges as described in claim 1, characterized in that, The maximum outer diameter of the metal wire guiding unit (2) is smaller than the inner diameter of the casting cylinder (3); The outer diameter of the axial bottom of the metal wire transition guide block (203) is smaller than the outer diameter of the axial top of the metal wire transition guide block (203), and the outer diameter of the axial top of the metal wire transition guide block (203) is equal to the outer diameter of the metal wire guide unit body (201) corresponding to the bottom of the wire groove (202). The central axis of the metal wire transition guide block (203) is arranged parallel to the central axis of the plurality of drug cone hole molds (9), and the axial bottom edge of the metal wire transition guide block (203) contacts the outer wall of the guide block contact section (901) of the plurality of drug cone hole molds (9).
5. The wire-embedding tooling for a propellant charge with embedded metal wire as described in claim 1, characterized in that, The width and depth of the groove (202) are both greater than the outer diameter of the metal wire (6).
6. A method for embedding a metal wire in a propellant charge, characterized in that, This method is implemented using the wire-embedded propellant cartridge as described in any one of claims 1 to 5, and specifically includes the following steps: Step 1: Install multiple cone hole molds (9) into the cone hole mold and wire mounting hole (102) of the base (1), so that the central axis of the wire transition guide block (203) is parallel to the central axis of the cone hole mold (9), and the axial bottom edge of the wire transition guide block (203) contacts the outer wall of the multiple guide block contact section (901). Step 2: Arrange multiple metal wires (6) in the wire groove (202) respectively. Then, stretch one end of the multiple metal wires (6) straight along the wire groove (202) to the metal wire temporary fixing post (204) at the top of the metal wire guide unit body (201) and temporarily wrap it. Stretch the other end of the multiple metal wires (6) along the wire groove (202) and pass them through the first end hole (904), the second end hole (905) and the third end hole (906) of the first end of the metal wire in sequence from top to bottom along the axial direction. Finally, wrap it around the first end fixing post (103). Step 3: Coaxially mount the pouring cylinder (3) outside the wire guide unit (2), then seal the bottom of the pouring cylinder (3) with the base (1), and seal the top of the pouring cylinder (3) with the upper retaining ring (4) arranged coaxially. Step 4: Remove multiple metal wires (6) from the temporary metal wire fixing post (204) of the metal wire guiding unit (2), stretch the metal wires (6) and lock them into the temporary metal wire slot (7) of the upper retaining ring (4), and then take out the metal wire guiding unit (2) axially from the end of the upper retaining ring (4); Step 5: Remove multiple metal wires (6) from the temporary metal wire slot (7) of the upper retaining ring (4), and then pass multiple metal wires (6) through the second end positioning slot (503) of the metal wire from bottom to top along the axial direction. Then, seal the bottom of the upper plate (5) with the top of the upper retaining ring (4) and finally straighten the multiple metal wires (6) and wrap them around the second end fixing post (504) of the metal wire. This completes the embedding method of the metal wire-embedded drug cartridge.
7. The method for embedding a metal wire in a propellant charge as described in claim 6, characterized in that, The number of the plurality of metal wires (6) is 3, 4 or 6.