CN109047512B - Solid engine spray pipe blank assembly, production method thereof and used mold - Google Patents

Solid engine spray pipe blank assembly, production method thereof and used mold Download PDF

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Publication number
CN109047512B
CN109047512B CN201811188863.0A CN201811188863A CN109047512B CN 109047512 B CN109047512 B CN 109047512B CN 201811188863 A CN201811188863 A CN 201811188863A CN 109047512 B CN109047512 B CN 109047512B
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China
Prior art keywords
die
blank
sleeve
spray pipe
mould
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CN201811188863.0A
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CN109047512A (en
Inventor
吴文华
汤子鑫
林华
林建楠
黄照协
彭齐钦
孙思浩
王齐
朱婉艳
宋有龙
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Fujian Ordnance Equipment Co ltd
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Fujian Ordnance Equipment Co ltd
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Priority to CN201811188863.0A priority Critical patent/CN109047512B/en
Publication of CN109047512A publication Critical patent/CN109047512A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
    • F02K9/97—Rocket nozzles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Exhaust Silencers (AREA)

Abstract

The utility model provides a solid engine spray tube blank subassembly, its main points lie in by water conservancy diversion ring blank, insulator, spray tube body blank constitute, the external surface of insulator coincides with the internal surface of spray tube body blank, and the diameter of its internal surface hypomere is the same with location step hole, and the upper end coincides with the external surface of water conservancy diversion ring blank, and the thermal-insulated internal surface between the terminal surface of location step hole to the little terminal surface of water conservancy diversion ring blank is continuous smooth from small to big loudspeaker shape. The material of the heat insulator is high silica cloth/phenolic aldehyde combination, the molding pressure is 20 MPa-28 MPa, the high silica cloth/phenolic aldehyde combination is placed on an oil press provided with an upper heating plate and a lower heating plate to be heated to 160-170 ℃, and after heat preservation and pressure maintaining are carried out for 8-10 min, the die is removed. According to the invention, the surface of the spray pipe body is covered with a layer of heat insulator with good ablation resistance and heat insulation performance, so that the defect that the inner wall of the solid engine spray pipe is easily ablated under the action of high temperature of tail gas is overcome, and the service life of the solid engine spray pipe is prolonged.

Description

Solid engine spray pipe blank assembly, production method thereof and used mold
Technical Field
The invention relates to a solid engine spray pipe, in particular to a solid engine spray pipe blank assembly, a production method thereof and a used die.
Background
With the improvement of the performance of the solid engine propellant, the requirement on the anti-scouring performance of the heat-insulating diffusion section of the spray pipe is continuously improved, and the existing aluminum spray pipe is easily ablated under the action of high temperature, so that the service performance is affected.
Disclosure of Invention
The invention aims to overcome the defects of the existing solid engine aluminum spray pipe and provide a solid engine spray pipe blank component with good heat insulation performance and ablation resistance, a production method thereof and a used die.
The invention adopts the technical scheme that the solid engine spray pipe blank component is characterized by comprising a guide ring blank, a heat insulator and a spray pipe body blank, wherein the spray pipe body blank is cylindrical in shape, a positioning step hole is formed in the lower end of the inner part of the spray pipe body blank, a counter bore I larger than the positioning step hole is formed above the positioning step hole, a counter bore II is formed in the upper end of the spray pipe body blank, the aperture of the inner surface of the spray pipe body blank is gradually increased from the end of the positioning step hole to the bottom of the counter bore II, a convex ring I is formed in the rear end of the counter bore I, the guide ring blank is formed by two hollow sections of cylinders with the upper part being large and the lower part, the surface of the small column section is provided with the convex ring II, the height of the heat insulator is formed from the bottom surface of the counter bore I to the end surface of the counter bore II, the outer surface of the heat insulator is identical to the positioning step hole, the rear end of the guide ring blank is identical to the outer surface of the guide ring blank, the inner surface of the heat insulator between the end of the positioning step hole and the small end of the guide ring blank is continuously and smoothly in a horn shape, the diameter of the small end of the horn shape is smaller than the horn shape, and the diameter of the small end of the horn is smaller than the horn shape is equal to the diameter of the large end of the horn shape.
The positioning step hole I at the lower end of the inner part of the spray pipe body blank is used for being matched with other parts of an engine, and a layer of heat insulator is added on the inner surface of the aluminum spray pipe body blank, so that the aluminum spray pipe is effectively prevented from being ablated at high temperature to influence the service performance of the spray pipe, and the inner surface of the heat insulator is smooth to reduce the air injection resistance.
Screw holes are formed in the surface of the guide ring blank, and the height of the upper end part of the guide ring blank is the design height of the upper end of the guide ring and the depth of the screw holes. In order to enable the guide ring blank to be positioned in the pressing process, a screw hole is specially designed to fix the guide ring blank and the core mold together, and therefore the height of the upper end of the guide ring blank is increased, and after the screw hole is removed through subsequent machining, the original design requirement is met.
The inner surface of the spray pipe blank from the positioning step hole end to the bottom of the counter bore II consists of a plurality of sections of concentric spindles, cones with different conicity and cylinders. The interface between the nozzle body blank and the insulator is designed as a non-smooth, discontinuous surface for the purpose of more secure bonding between the two. But all cross sections are concentric circles, which is to provide the same thickness of insulation over the same cross section.
The heat insulator is pressed by using a filler material formed by mixing high silica cloth and phenolic aldehyde. The high silica cloth/phenolic aldehyde has the advantages of excellent mechanical property, ablation resistance, good heat insulation performance, low cost and the like.
A die for pressing the blank of said jet pipe of solid engine is composed of upper cover, die sleeve, handle, core die, locating column, and backing plate.
The invention fully considers the fixation and the positioning of the blank pressing process of the guide ring when designing the mould, and designs the upper and the lower exhaust grooves, so that the air in the mould cavity and various gases generated in the heating process can be discharged in the mould pressing process, and redundant materials can overflow from the mould after the mould is closed, thereby being beneficial to the density of the formed parts. The diversion ring blank and the core mould are creatively fixed together by countersunk screws. Therefore, the fixing and positioning of the blank of the guide ring in the pressing process are solved, and finally, the superfluous materials on the end face of the blank of the guide ring are cut off through machining.
The die is provided with a plurality of stepped holes, and the die cannot be removed at one time, so the applicant also designs a die removing device of the die, the die removing device comprises a die removing rod I, a die removing sleeve I, a die removing rod II, a die removing sleeve II and a die removing rod III, the die removing rod I is cylindrical, the diameter of the die removing rod I is smaller than the inner diameter of an inner hole of a core die, the die removing sleeve I is hollow cylindrical, the inner hole of the die removing sleeve I is larger than the outer diameter of a large cylinder of a positioning column, the upper end face of the die removing sleeve I is provided with a counter bore III matched with the outer diameter of the die sleeve, the die removing rod I is matched with the die removing sleeve I for removing the positioning column, the die removing rod II is cylindrical, the diameter of the die is smaller than the diameter of the smallest end of the core die, the die removing sleeve II is hollow cylindrical, the inner hole of the die removing sleeve II is larger than the outer diameter of the upper end cylinder of the core die, the upper end face of the die sleeve III is provided with a counter bore matched with the outer diameter of an upper cover, the die III is smaller than the outer diameter of the upper end cylinder of the core die, the die III is matched with the die sleeve III, and the die blank is separated from the outer diameter of the die sleeve III is matched with the outer diameter of the die sleeve III.
A method for manufacturing the blank component of solid engine jet pipe by using the mould for pressing the blank component of solid engine jet pipe includes such steps as coating demoulding agent on the inner, outer and lower end surfaces of core mould, locking guide ring blank and core mould by countersunk screw, putting mould sleeve in the central position of backing plate, putting the outer circumference of blank of jet pipe in the inner surface of mould sleeve, putting the big cylindrical end of guide column in the centre of mould sleeve, putting the locating stepped hole of blank of jet pipe in the locating column, putting the mixture of high-silica cloth and phenolic aldehyde in a certain weight in the mould cavity between blank of jet pipe and locating column, pressing the blank of guide ring in the mould cavity, pressing the mould to 20-28 MPa, heating to 160-170 deg. for 8-10 min, and demoulding.
The high silica cloth and phenolic aldehyde mixed material insulator produced by controlling the mold loading temperature, the molding temperature and the curing temperature and time is tightly connected with the spray pipe body blank.
The die stripping step for manufacturing the solid engine spray pipe blank component comprises the following steps of: a) Placing the closed die on a counter bore III matched with the outer diameter of the die sleeve I, placing a die withdrawing rod I on an inner hole of the core die, and withdrawing the positioning column; b) Removing countersunk screws on the blank of the guide ring and the core mold, turning over the mold for 180 degrees, placing the mold on a mold withdrawal sleeve II, wherein the upper end surface of the mold withdrawal sleeve II is provided with a counter bore IV matched with the outer diameter of the upper cover, and a mold withdrawal rod II is placed on the lower end surface of the core mold and withdraws from the core mold; c) The die is turned over for 180 degrees again, the die is placed on a die-withdrawing sleeve III, a counter bore V matched with the outer diameter of the die sleeve is arranged on the upper end face of the die-withdrawing sleeve III, a die-withdrawing rod III is placed into an inner hole of the upper cover, a blank closing piece is withdrawn, screw holes on the upper end face of a guide ring blank are turned, and finally, a spray pipe assembly with all parts meeting the requirements of drawing is formed in a machine mode.
According to the invention, the surface of the spray pipe body is covered with a layer of heat insulator with good ablation resistance and heat insulation performance, so that the defect that the inner wall of the solid engine spray pipe is easily ablated under the action of high temperature of tail gas is overcome, and the service life of the solid engine spray pipe is prolonged. The die has the advantages of simple and reasonable structure, convenient manufacture and low cost, fully considers the exhaust of the manufacturing process, and designs the die withdrawing device. The die pressing device has the advantages of simple structure, convenient manufacture and low cost, and is suitable for small-batch production or scientific research stage production. The molding process of the product avoids the traditional bonding process, improves the working efficiency, reduces the product cost and effectively improves the product qualification rate.
Drawings
FIG. 1 is a schematic view of the structure of the present invention
FIG. 2 is a schematic structural view of a mandrel according to the present invention
FIG. 3 is a schematic view of a blank of a baffle ring according to the present invention
FIG. 4 is a schematic diagram showing a combination of a core mold and a guide ring blank according to the present invention
FIG. 5 is a schematic view of the structure of the die sleeve of the present invention
FIG. 6 is a top view of FIG. 5
FIG. 7 is a schematic view of the pressing process of the present invention
FIG. 8 is a schematic diagram of a first step of die stripping according to the present invention
FIG. 9 is a schematic diagram of a second step of die stripping according to the present invention
FIG. 10 is a schematic diagram of a third step of die stripping according to the present invention
Wherein: 1, a guide ring blank 12 convex ring, a screw hole 15 fixing piece 2, a heat insulator 22 horn-shaped 3, a spray pipe body blank 31 positioning step hole 32 counter bore I33 counter bore II 34 convex ring I4 upper cover 41 convex shoulder 42 exhaust groove III 5 die sleeve 51 handle 52 step hole II 53 exhaust groove I54 exhaust groove II 6 core mold 62 step surface 63 core mold inner bore 64 hole 7 positioning post 71 small cylinder 72 large cylinder 8 backing plate 91 ejector pin I92 ejector pin I921 ejector sleeve I921 ejector pin I ejector pin inner bore 922 counter bore III 93 ejector pin II 94 ejector sleeve II 941 ejector sleeve II inner bore 942 counter bore IV 95 ejector pin III ejector sleeve III 941 ejector sleeve III.
Detailed Description
The invention will now be described in detail with reference to the drawings, the examples being given to enable one skilled in the art to make a better understanding of the invention without limiting the invention in any way.
As shown in figure 1, a solid engine spray pipe blank component consists of a guide ring blank 1, a heat insulator 2 and a spray pipe body blank 3, wherein the spray pipe body blank is cylindrical in shape, a positioning step hole 31 is formed in the lower end of the inner part of the spray pipe body blank, a counter bore I32 larger than the positioning step hole is formed in the upper end of the positioning step hole, a counter bore II 33 is formed in the upper end of the spray pipe body blank, a connecting surface between the spray pipe body blank and the heat insulator is designed to be a non-smooth and discontinuous surface for being firmly connected with the heat insulator, even a fluctuant curved surface, and the inner surface of the spray pipe body blank from the end of the positioning step hole to the bottom of the counter bore II 33 consists of a plurality of sections of concentric shafts, cones with different conicity and cones with different directions. But all cross sections are concentric circles, which is to provide the same thickness of insulation over the same cross section. The diameter of the inner surface of the spray pipe blank is gradually increased from the end of the positioning step hole to the diameter of the cross section of the bottom of the counter bore II 33, the rear end of the counter bore I32 is provided with a convex ring I34, the guide ring blank is formed by two hollow sections with large upper part and small lower part, the surface of the small column section is provided with a convex ring II 12, the height of the heat insulator is from the bottom surface of the counter bore I to the end surface of the counter bore II, the outer surface of the heat insulator is matched with the inner surface of the spray pipe blank, the diameter of the lower section of the inner surface is the same as that of the positioning step hole, the rear end of the counter bore II is matched with the outer surface of the guide ring blank, the inner surface of the heat insulator between the end surface of the positioning step hole and the small end surface of the guide ring blank is continuously smooth horn-shaped 22 from small to large, the diameter of the small end of the horn-shaped small end is smaller than the power step hole, and the diameter of the large end of the horn-shaped is equal to the inner diameter of the guide ring blank. The heat insulator is made of a material with ablation resistance and good heat insulation performance, the inner surface temperature of the aluminum spray pipe body is guaranteed to be lower than the ablated temperature, and the heat insulator is generally formed by pressing a filling material which is provided by a manufacturer and is formed by mixing high silica cloth and phenolic aldehyde. The high silica cloth/phenolic aldehyde has the advantages of excellent mechanical property, ablation resistance, good heat insulation performance, low cost and the like.
As shown in figures 2-7, a die for pressing the blank assembly of the solid engine spray pipe adopts common steel, the combination of all parts mainly adopts clearance fit, the die comprises an upper cover 4, a die sleeve 5, a handle 51, a core die 6, a positioning column 7 and a base plate 8, the upper end of the core die is cylindrical, the diameter of the core die is equal to the inner diameter of a guide ring blank, a step surface 62 is matched with the upper end surface 13 of the guide ring blank, the upper end surface of the core die is provided with a hole 64 matched with a fixing piece 15 (such as a countersunk screw), the upper end surface 13 of the guide ring blank is provided with a screw hole 14 matched with the fixing piece 15, the mounting passes the mandrel and is fixed in the screw 14 of the up end of water conservancy diversion ring blank, fix mandrel and water conservancy diversion ring blank, the reference column is that big-end-down's two sections cylinders are constituteed, the little cylinder of upper segment 71 cooperatees with the hole 63 of mandrel, the big cylinder of lower segment 72 cooperatees with the step hole I of spray tube body blank, the reference column passes spray tube body blank and mandrel and connects fixedly both, the interior bore diameter of die sleeve 5 equals the external diameter of spray tube body blank 3, its height equals the height of spray tube body blank, the fixed (welding) of die sleeve outer circumferential surface has handle 51, the handle is bilateral symmetry and distributes, be convenient for manual operation. The die sleeve is sleeved outside the blank of the spray pipe body, the upper end of the die sleeve is provided with a step hole II 52 matched with an upper cover, the upper end face is provided with an exhaust groove I53 for exhausting air in a die cavity and various gases generated in the heating process in the pressing process, the lower end of the upper cover is provided with a shoulder 41 and an exhaust groove III 42 matched with the step hole II, the exhaust groove III 42 and the exhaust groove I53 are preferably arranged on the same section, the exhaust is convenient, the lower end face of the die sleeve is provided with an exhaust groove II 54, and the lower end face of the die sleeve is connected with the base plate 8.
The invention fully considers the fixation and the positioning of the blank pressing process of the guide ring when designing the mould, and designs the upper and the lower exhaust grooves, so that the air in the mould cavity and various gases generated in the heating process can be discharged in the mould pressing process, and redundant materials can overflow from the mould after the mould is closed, thereby being beneficial to the density of the formed parts. Therefore, the fixing and positioning of the blank of the guide ring in the pressing process are solved, and finally, the superfluous materials on the end face of the blank of the guide ring are cut off through machining.
As shown in figure 7, a method for manufacturing a solid engine spray pipe blank component by using a mould for pressing the solid engine spray pipe blank component comprises the steps of coating release agents on the inner end surface, the outer surface and the lower end surface of a core mould, coating release agents on the end surfaces of the large outer cylindrical surface and the small outer cylindrical surface of a positioning column, locking a guide ring blank and the core mould by using countersunk screws, placing a mould sleeve on the central position of a base plate, placing the outer circumference of the spray pipe blank into the inner surface of the mould sleeve, placing the large cylindrical end of the positioning column downwards into the centre of the mould sleeve, sleeving a positioning column downwards by using a positioning stepped hole of the spray pipe blank, enabling the lower end surface of the positioning column and the lower end surface of the spray pipe blank to be flush with the lower end surface of the mould sleeve, calculating the weight of the required high silica cloth/phenolic composite filling material according to the volume of a heat insulation body and the density of the high silica cloth and phenolic composite filling material, filling the required weight of the required high silica cloth and phenolic composite material into the mould cavity between the spray pipe blank and the positioning column, placing the core mould blank and the core mould blank in the mould cavity, placing the mould cavity between the spray pipe blank and the mould cavity, pressurizing the core mould and the guide ring blank into the mould cavity, pressurizing the mould to the mould cavity, forming the mould to the mould cavity under the pressure of 20 MPa-28 MPa, keeping the pressure for 160-holding the upper and lower heating the mould cavity and the mould cavity between 170-holding the upper and lower heating mould and the upper and phenolic cloth for 160 minutes to 8 minutes, and 10 minutes after the heat-holding. The air in the die cavity and various gases generated in the heating process can be removed in the die pressing process, and redundant materials can overflow from the die after the die is closed, so that the density of a molded part is facilitated.
The high silica cloth and phenolic aldehyde mixed material insulator produced by controlling the mold loading temperature, the molding temperature and the curing temperature and time is tightly connected with the spray pipe body blank.
As shown in fig. 8-10, since the above-mentioned mold has a plurality of stepped holes, the mold cannot be withdrawn at one time, so the applicant has also devised its mold withdrawing device for withdrawing the mold layer by layer from inside to outside. The positioning column is withdrawn first, the core mould is withdrawn again, and the final product is separated from the upper cover and the mould sleeve. The die stripping device comprises a die stripping rod I91, a die stripping sleeve I92, a die stripping rod II 93, a die stripping sleeve II 94, a die stripping rod III 95 and a die stripping sleeve III 96, wherein the die stripping rod I is cylindrical, the diameter is smaller than the inner diameter of the inner hole 63 of the core die, the die stripping sleeve I92 is hollow cylindrical, the inner hole 921 of the die stripping sleeve I is larger than the outer diameter of the large cylinder 72 of the positioning column, the upper end face is provided with a counter bore III 922 matched with the outer diameter of the die stripping sleeve, the die stripping rod I is matched with the die stripping sleeve I to be used for stripping the positioning column, the die stripping rod II 93 is cylindrical, the diameter is smaller than the diameter of the smallest end of the core die, the die stripping sleeve II 94 is hollow cylindrical, the inner hole 941 of the die stripping sleeve II is larger than the outer diameter of the upper end cylinder of the core die, the upper end face is provided with a counter bore IV 942 matched with the outer diameter of the upper cover, the die stripping rod II is matched with the die stripping sleeve II 94 to be used for stripping the core die, the die stripping sleeve III 96 is cylindrical, the diameter is smaller than the outer diameter of the blank of the upper end face of the die sleeve III is matched with the outer diameter of the upper end cylinder of the core die, and the die III is used for stripping the outer diameter of the die III is matched with the die sleeve III to be used for stripping the outer diameter of the die.
The die stripping step for manufacturing the solid engine spray pipe blank component comprises the following steps of: a) Placing the closed die on a counter bore III matched with the outer diameter of the die sleeve I, placing a die withdrawing rod I on an inner hole of the core die, and withdrawing the positioning column; b) Removing countersunk screws on the blank of the guide ring and the core mold, turning over the mold for 180 degrees, placing the mold on a mold withdrawal sleeve II, wherein the upper end surface of the mold withdrawal sleeve II is provided with a counter bore IV 942 matched with the outer diameter of the upper cover, and a mold withdrawal rod II is placed on the lower end surface of the core mold and withdraws from the core mold; c) The die is turned over again for 180 degrees, the die is placed on a die stripping sleeve III, a counter bore V962 matched with the outer diameter of the die stripping sleeve is arranged on the upper end face of the die stripping sleeve III, a die stripping rod III is placed into an inner hole of the upper cover, a blank closing piece is withdrawn, a screw hole on the upper end face of a guide ring blank is turned, and redundant materials on the end face of the guide ring blank are cut off by machining. The invention uses jet pipe blank and guide ring blank to press heat insulator, the finished product is solid engine jet pipe blank component, and finally the jet pipe component with all parts meeting the requirement of drawing is formed by machining.

Claims (8)

1. A solid engine spray pipe blank component is characterized in that the solid engine spray pipe blank component consists of a guide ring blank (1), a heat insulator (2) and a spray pipe body blank (3), the spray pipe body blank is cylindrical in shape, a positioning step hole (31) is formed in the lower end of the inner part of the spray pipe body blank, a counter bore I (32) with the aperture larger than that of the positioning step hole is formed in the upper part of the positioning step hole, a counter bore II (33) is formed in the upper end of the spray pipe body blank, the aperture of the inner surface of the spray pipe body blank is gradually increased from the end of the positioning step hole to the bottom of the counter bore II (33), a convex ring I (34) is formed in the rear end of the counter bore I (32), the guide ring blank is formed by two hollow sections of cylinders with the upper part and the lower part being small, the surface of the small column section is provided with a convex ring II (12), the height of the heat insulator is from the bottom surface of the counter bore I to the end surface of the counter bore II, the outer surface of the heat insulator is matched with the inner surface of the jet pipe body blank, the diameter of the lower section of the inner surface of the heat insulator is the same as that of the positioning step hole, the inner surface of the heat insulator is matched with the outer surface of the guide ring blank at the rear end of the counter bore II, the inner surface of the heat insulator between the end surface of the positioning step hole and the end surface of the small column section of the guide ring blank is continuously and smoothly in a trumpet shape (22) from small to large, the diameter of the small end of the trumpet shape is smaller than that of the positioning step hole, and the diameter of the large end of the trumpet shape is equal to the inner diameter of the guide ring blank.
2. A solid engine nozzle blank assembly according to claim 1, characterized in that the surface of the deflector ring blank is provided with screw holes (14), the height of the upper end of the deflector ring blank being the design height of the upper end of the deflector ring plus the depth of the screw holes.
3. A solid engine nozzle blank assembly as claimed in claim 1 wherein the inner surface of the nozzle body blank from the locating stepped bore end to the bottom of counterbore ii (33) is comprised of a plurality of concentric circular shafts, conical and cylindrical shapes of varying conicity.
4. A solid engine nozzle blank assembly as defined in claim 1 wherein the insulation is pressed using a high silica cloth and phenolic mixed filler material.
5. A mould for pressing a solid engine spray pipe blank component is characterized by comprising an upper cover (4), a mould sleeve (5), a handle (51), a core mould (6), a positioning column (7) and a base plate (8), wherein the upper end of the core mould is cylindrical, the diameter of the core mould is equal to the inner diameter of a guide ring blank, a step surface (62) is matched with the upper end surface (13) of the guide ring blank, a hole (64) matched with a fixing piece (15) is processed on the upper end surface of the core mould, a screw hole (14) matched with the fixing piece (15) is processed on the upper end surface of the guide ring blank, the fixing piece penetrates through the core mould to be fixed in the screw hole (14) of the upper end surface of the guide ring blank, and the core mould and the guide ring blank are fixed, the positioning column is composed of two sections of cylinders with small upper section and large lower section, the small upper section of cylinder (71) is matched with an inner hole (63) of the core mould, the large lower section of cylinder (72) is matched with a step hole I of the spray pipe body blank, the positioning column penetrates through the spray pipe body blank and the core mould to connect and fix the spray pipe body blank and the core mould, the inner hole diameter of the die sleeve (5) is equal to the outer diameter of the spray pipe body blank (3), the height of the die sleeve is equal to the height of the spray pipe body blank, the outer circumferential surface of the die sleeve is fixedly provided with a handle (51), the die sleeve is sleeved outside the spray pipe body blank, the upper end of the die sleeve is provided with a step hole II (52) matched with the upper cover, the upper end surface is provided with an exhaust groove I (53) for exhausting air in the die cavity and various gases generated in the heating process, the lower end of the upper cover is provided with a shoulder (41) and an exhaust groove III (42) which are matched with the step hole II, the lower end surface of the die sleeve is provided with an exhaust groove II (54), and the lower end surface of the die sleeve is connected with the backing plate (8).
6. The die for pressing a blank component of a solid engine nozzle as set forth in claim 5, further comprising a die stripping device, wherein the die stripping device comprises a die stripping rod I (91), a die stripping sleeve I (92), a die stripping rod II (93), a die stripping sleeve II (94), a die stripping rod III (95) and a die stripping sleeve III (96), the die stripping rod I is cylindrical, the diameter of the die stripping rod I is smaller than the inner diameter of the inner hole (63) of the core die, the die stripping sleeve I (92) is hollow cylindrical, the inner hole (921) of the die stripping sleeve I is larger than the outer diameter of the large cylinder (72) of the positioning column, the upper end surface is provided with a counter bore III (922) matched with the outer diameter of the die stripping sleeve, the die stripping rod I is matched with the positioning column, the die stripping rod II (93) is cylindrical, the diameter of the smallest end of the core die, the die stripping sleeve II (94) is hollow cylindrical, the inner hole (941) of the upper end is larger than the outer diameter of the cylindrical upper end of the core die, the upper end face of the die stripping sleeve II (94) is provided with a counter bore of the hollow cylindrical, the die stripping sleeve III (96) matched with the outer diameter of the die stripping sleeve III is smaller than the outer diameter of the core die blank (96), the ejector pin III (95) and ejector sleeve III (96) cooperate to separate the finished product from the upper cover and sleeve.
7. A method for manufacturing a solid engine spray pipe blank assembly by using a mould for pressing the solid engine spray pipe blank assembly as claimed in claim 5 is characterized in that a demoulding agent is coated on the inner surface, the outer surface and the lower end surface of a core mould, the end surfaces of the large outer cylindrical surface and the small outer cylindrical surface of a positioning column are coated with the demoulding agent, a guide ring blank and the core mould are locked by using countersunk screws, a mould sleeve is placed on the central position of a base plate, the outer circle of a spray pipe body blank is placed in the inner surface of the mould sleeve, the large cylindrical end of the positioning column is placed downwards into the centre of the mould sleeve, a positioning stepped hole of the spray pipe body blank is downwards sleeved into the positioning column, the lower end surface of the spray pipe body blank and the lower end surface of the mould sleeve are flush, then a mixture of high silica cloth and phenolic aldehyde with a certain weight is weighed, the mixture is filled into a mould cavity between the spray pipe blank and the positioning column, the core mould and the guide ring blank are placed into the mould cavity, the mould cavity is pressurized on an oil press until the mould is closed, the forming pressure is 20 MPa-28 MPa, and the mould is placed on the oil press with an upper heating plate and a lower heating plate until 160 DEG-170 deg, and heat is kept for 8 min-10 min.
8. A die for pressing a solid engine nozzle blank assembly as defined in claim 6, wherein the die stripping step comprises: a) Placing the closed die on a counter bore III matched with the outer diameter of the die sleeve I, placing a die withdrawing rod I on an inner hole of the core die, and withdrawing the positioning column; b) Removing countersunk screws on the blank of the guide ring and the core mold, turning over the mold for 180 degrees, placing the mold on a mold withdrawal sleeve II, wherein the upper end surface of the mold withdrawal sleeve II is provided with a counter bore IV (942) matched with the outer diameter of the upper cover, and a mold withdrawal rod II is placed on the lower end surface of the core mold and withdraws from the core mold; c) The die is turned over again for 180 degrees, the die is placed on a die withdrawing sleeve III, a counter bore V (962) matched with the outer diameter of the die sleeve is arranged on the upper end face of the die withdrawing sleeve III, a die withdrawing rod III is placed into an inner hole of the upper cover, a jet pipe blank assembly is withdrawn, screw holes on the upper end face of a guide ring blank are turned, and finally the jet pipe assembly with all parts meeting the requirements of drawing is formed in a machine mode.
CN201811188863.0A 2018-10-12 2018-10-12 Solid engine spray pipe blank assembly, production method thereof and used mold Active CN109047512B (en)

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CN111531062B (en) * 2020-04-14 2021-11-19 大连理工大学 Automatic turning device of automobile exhaust mixing pipe lobe
CN113719380B (en) * 2021-08-28 2022-12-06 福建兵工装备有限公司 Endurance engine tail pipe lining blank and pressing die and manufacturing method thereof

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DE3637967A1 (en) * 1986-11-07 1988-05-19 Huels Troisdorf Multi-chamber rocket motor
US6354797B1 (en) * 2000-07-27 2002-03-12 General Electric Company Brazeless fillet turbine nozzle
CN100537477C (en) * 2007-07-06 2009-09-09 傅秀师 Technique for preparing engine main jet pipe throat lining
CN202360245U (en) * 2011-11-21 2012-08-01 湖北航天技术研究院总体设计所 Simplified combined nozzle structure of engine
CN105291390A (en) * 2014-07-11 2016-02-03 天津滨海超越绝缘制品有限公司 Manufacturing method for spray pipe of propeller
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