Laying reinforcement system for shell head of solid rocket engine

Abstract

The invention discloses a solid rocket engine shell end socket laying and reinforcing system, and particularly relates to the technical field of solid rocket engine shells, the solid rocket engine shell end socket laying and reinforcing system comprises a cutting unit, a gum dipping unit and a laying unit; the cutting unit comprises a cutting rack, a cutting device and an angle dial, the angle dial is used for placing the reinforcing sheets, and the cutting device is used for cutting the sector-shaped reinforcing sheets; the gum dipping unit comprises a vacuum pump, a gum dipping device and a gum injection device, the gum dipping device is used for placing a sector-shaped reinforcing sheet, the vacuum pump is used for vacuumizing the gum dipping device, and the gum injection device is used for injecting resin gum into the vacuumized gum dipping device; the paving unit comprises a paving rack, a paving gripper device and a fiber winding device, the paving rack is provided with a rotating shaft allowing the shell to be fixedly arranged in a sleeving mode, the paving gripper device attaches the gum dipping reinforcing sheet to the shell end socket, and the fiber winding device winds yarn at the position where the gum dipping reinforcing sheet is attached. According to the device, efficient and accurate cutting, full gum dipping and accurate paving of the reinforcing material can be achieved, and the reinforcing quality and stability of the shell end socket are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solid rocket engine shell, in particular to a solid rocket engine shell head laying reinforcement system. BACKGROUND

[0002] As a key propulsion system in the field of aerospace, solid rocket engine puts forward high requirements on material performance, especially the head region, which needs to have excellent heat resistance, pressure resistance and wear resistance. During the service of the composite material shell, the head region bears complex loads such as high temperature, high pressure and vibration, and is prone to fatigue damage and crack initiation. If the overall thickness of the shell is increased to improve the strength of the shell region, the shell mass will be redundant. Therefore, reinforcing the head part can effectively improve its carrying capacity and fatigue resistance, reduce the mass while ensuring the safety of the structure, and realize the lightweight design of the shell.

[0003] Currently, the carbon fiber composite material shell head laying reinforcement usually uses carbon fiber woven cloth or weftless cloth as the reinforcement material, which needs to be cut manually to obtain the required carbon cloth shape, then the carbon cloth is impregnated with matching resin, and finally the cut carbon cloth is laid on the head reinforcement area. However, due to the high complexity of the shell head laying reinforcement process itself, the lack of unified standard in the process flow, and the great influence of human operation factors, the forming quality of the shell head laying reinforcement fluctuates significantly, which seriously restricts the overall improvement of the carbon fiber composite material shell head reinforcement technology. In summary, the existing carbon fiber composite material shell head reinforcement technology lacks in-depth research and design of special reinforcement process devices, and it is urgent to improve the reinforcement quality and production efficiency from the process device level. SUMMARY

[0004] The purpose of the present application is to provide a solid rocket engine shell head laying reinforcement system to solve the problems existing in the prior art, which can realize efficient and accurate cutting of reinforcement materials, sufficient impregnation and accurate laying, and improve the quality and stability of shell head reinforcement.

[0005] To achieve the above purpose, the present application provides the following solutions: The application provides a solid rocket engine shell head laying reinforcing system, which comprises a cutting unit, a dipping unit and a laying unit; the cutting unit comprises a cutting rack, a cutting device and an angle scale dial, the angle scale dial and the cutting device are both mounted on the cutting rack, the angle dial is used for placing a reinforcing sheet, the cutting device comprises a telescopic swing arm, and the telescopic swing arm is used for cutting a sector-shaped reinforcing sheet; the dipping unit comprises a vacuum pump, a dipping device and a resin injection device, the dipping device is used for placing the sector-shaped reinforcing sheet, the vacuum pump is connected with the dipping device and performs vacuumization on the dipping device, and the resin injection device is connected with the dipping device and used for injecting resin into the vacuumized dipping device; the laying unit comprises a laying rack, a laying gripper device and a fiber winding device, the laying gripper device and the fiber winding device are both mounted on the laying rack, the laying rack has a rotating shaft, a solid rocket engine shell is used for being fixedly sleeved outside the rotating shaft, the laying gripper device is used for laying the sector-shaped reinforcing sheet after dipping on the solid rocket engine shell head, and the fiber winding device is used for winding yarn on the laid reinforcing sheet.

[0006] Preferably, the cutting unit further comprises a pressing device, the pressing device comprises a moving plate, a rotating handle, a pressing gear, a pressing rack and a pressing plate, the moving plate is in sliding connection with the cutting rack, the rotating handle is mounted on the moving plate, the pressing gear is fixedly connected with the rotating handle, the pressing rack is in sliding connection with the moving plate, the pressing rack is in meshing connection with the pressing gear, and the pressing plate is fixedly connected with the pressing rack; rotating the rotating handle drives the pressing gear to rotate, and then drives the pressing rack to ascend or descend along the vertical direction.

[0007] Preferably, the cutting device comprises a back plate, a swing motor, a lifting driving device, a telescopic driving device, a sliding plate, a driving gear, a driven gear, a fixed arm, a moving arm and a cutting knife, the back plate is fixedly connected with the cutting rack, the back plate is provided with a vertical sliding groove, the sliding plate is in sliding connection with the vertical sliding groove, the lifting driving device is connected with the sliding plate and used for driving the sliding plate to slide on the sliding groove, the swing motor is fixedly connected with the sliding plate, an output shaft of the swing motor is fixedly connected with the driving gear, the driving gear is in meshing connection with the driven gear, one end of the fixed arm is provided with a swing shaft, the driven gear is fixedly connected with the swing shaft, and a swing axis of the swing shaft is parallel to the vertical sliding groove, the moving arm is in sliding connection with the other end of the fixed arm, the telescopic driving device is connected with the moving arm and used for driving the moving arm to move towards the direction of approaching or moving away from the fixed arm, and the cutting knife is fixedly connected with the end of the moving arm away from the fixed arm.

[0008] Preferably, the impregnation device comprises an impregnation frame and an impregnation container, the impregnation container is connected with the impregnation frame, the impregnation container has a cavity, a glue injection hole and a vacuum hole, the glue injection hole and the vacuum hole are communicated with the cavity, the cavity is used for accommodating the reinforcing sheet, the glue injection hole is connected with the glue injection device and communicated, and the vacuum hole is communicated with the vacuum pump.

[0009] Preferably, the impregnation container comprises an impregnation bottom plate and an impregnation cover plate, the impregnation bottom plate is fixedly connected with the impregnation frame, the impregnation cover plate is slidingly connected with the impregnation frame, the impregnation bottom plate and the impregnation cover plate are spliced to form the cavity, the glue injection hole is arranged on the impregnation cover plate, the glue injection device comprises a flow guide nozzle, the flow guide nozzle is fixedly connected with the center of the bottom surface of the impregnation cover plate and communicated with the glue injection hole; the impregnation bottom plate is provided with an annular groove, the impregnation cover plate is provided with an annular sealing strip matched with the annular groove, the vacuum hole comprises an upper vacuum hole and a lower vacuum hole, the upper vacuum hole is arranged on the annular sealing strip, the lower vacuum hole is arranged on the annular groove, and the upper vacuum hole and the lower vacuum hole correspond to each other, the number of the vacuum holes is four, and the four vacuum holes are uniformly distributed along the circumference of the annular groove.

[0010] Preferably, the glue injection device comprises a glue storage container, a stirring device, a heating device and a glue outlet pipe, the glue storage container is used for storing resin glue, the stirring device is connected with the glue storage container and used for stirring the resin glue, the heating device is connected with the glue storage container and used for heating the resin glue, and one end of the glue outlet pipe is connected with the glue storage container and the other end is connected with the glue injection hole.

[0011] Preferably, the paving machine frame comprises a first fixed column, a second fixed column, a first cross beam, a second cross beam and a movable column, the first fixed column and the second fixed column are fixedly installed on the ground, two ends of the first cross beam are fixedly connected with the top ends of the first fixed column and the second fixed column respectively, two ends of the second cross beam are fixedly connected with the bottom ends of the first fixed column and the second fixed column respectively, the first cross beam is provided with a first guide rail, the second cross beam is provided with a second guide rail, the first guide rail is parallel to the second guide rail, two ends of the movable column are slidingly connected with the first guide rail and the second guide rail respectively, the rotating shaft is rotatably installed on the first fixed column, and the rotating axis of the rotating shaft is parallel to the first guide rail, and the paving gripper device is installed on the movable column.

[0012] Preferably, the tiling gripper device comprises a tiling motor, a lead screw, a moving block, a fixed block, a plurality of support rods, a plurality of right-angle supports, a plurality of gripper pieces, the tiling motor is fixedly connected with the moving column, the output shaft of the tiling motor is fixedly connected with one end of the tiling lead screw, the fixed block is sleeved on the other end of the tiling lead screw, the tiling lead screw can rotate relative to the fixed block, the moving block is threadedly connected with the tiling lead screw, one end of each of the right-angle supports is hingedly connected with the fixed block, the other end of each of the right-angle supports is respectively hingedly connected with one of the gripper pieces, one end of each of the support rods is hingedly connected with the moving block, the other end of each of the support rods is respectively hingedly connected with the middle part of one of the right-angle supports, and all the gripper pieces can be spliced into the shape of a solid rocket engine shell head.

[0013] Preferably, the tiling gripper device further comprises an air pump, the outer sidewall of the gripper piece is provided with an air inlet hole, the inner sidewall of the gripper piece is provided with an air outlet hole, the air inlet hole is in communication with the air outlet hole, and the air pump is in communication with the air inlet hole through an air pipe.

[0014] Preferably, the fiber winding device comprises a mounting column, a winding motor, a winding lead screw, a limiting rod, a yarn disc, a filament nozzle cantilever, a yarn guide roller and a filament nozzle, the winding motor is installed on the first fixed column, one end of the winding lead screw is connected with the winding motor, the other end of the winding lead screw is rotatably connected with the second fixed column, the limiting rod is fixedly connected with the first fixed column and the second fixed column at both ends, the winding lead screw is parallel to the limiting rod, the mounting column is threadedly connected with the winding lead screw and slidably connected with the limiting rod, the yarn disc and the filament nozzle cantilever are fixedly installed on the mounting column, the yarn guide roller and the filament nozzle are both installed on the filament nozzle cantilever, and the yarn leaving the yarn disc reaches the reinforcing piece tiled on the solid rocket engine shell head in sequence through the yarn guide roller and the filament nozzle.

[0015] The present application has the following technical effects relative to the prior art: The application provides a solid rocket engine shell head laying reinforcing system, which comprises a cutting unit, a glue dipping unit and a laying unit; the cutting unit positions a reinforcing sheet through an angle scale dial, controls a cutting track by means of a telescopic swing arm, accurately cuts out a sector-shaped reinforcing sheet, avoids the problems of irregular shape and large size deviation in traditional manual cutting, and lays a shape foundation for subsequent head curved surface fitting; the glue dipping unit performs vacuumization on the glue dipping device through a vacuum pump, and then injects resin glue through a glue injection device, so that the reinforcing sheet and the resin are uniformly infiltrated, bubbles are avoided to be left in the traditional glue dipping process, the reinforcing sheet is uniformly dipped, and the bonding strength of the reinforcing sheet and the shell is improved; the laying unit accurately positions and lays the dipped reinforcing sheet through a laying gripper device, rotates the engine shell through a rotating shaft, and combines a fiber winding device to perform secondary reinforcement on the reinforcing area through yarn winding, so that the dipped reinforcing sheet is stably attached to the head, and the reinforcing effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 It is a structural schematic diagram of the solid rocket engine shell head laying reinforcing system; Figure 2 It is a structural schematic diagram of the cutting unit; Figure 3 It is a structural schematic diagram of the pressing device of the cutting unit; Figure 4 It is a structural schematic diagram of the cutting device of the cutting unit; Figure 5 It is a structural schematic diagram of the glue dipping unit; Figure 6 It is a structural schematic diagram of the glue dipping cover plate of the glue dipping unit; Figure 7 It is a top view of the glue dipping frame of the glue dipping unit; Figure 8 It is a structural schematic diagram of the laying unit; Figure 9 It is a structural schematic diagram of the laying unit from another perspective; Figure 10 It is a structural schematic diagram of the laying gripper device of the laying unit; Figure 11 It is a structural schematic diagram of the fiber winding device of the laying unit.

[0018] In the figure: 1, cutting unit; 11, cutting frame; 111, horizontal sliding slot; 12, cutting device; 121, back plate; 122, swing motor; 123, sliding plate; 124, driving gear; 125, driven gear; 126, fixed arm; 127, moving arm; 128, cutting knife; 13, angle scale dial; 14, pressing device; 141, moving plate; 142, rotating handle; 143, pressing gear; 144, pressing rack; 145, pressing plate; 2, impregnation unit; 21, vacuum pump; 22, impregnation frame; 23, impregnation bottom plate; 231, annular groove; 232, lower vacuum hole; 24, impregnation cover plate; 241, annular sealing strip; 242, upper vacuum hole; 25, flow guide nozzle; 26, glue injection device; 261, glue storage container; 262, stirring device; 263, heating device; 3, laying unit; 31, laying frame; 311, first fixed column; 312, second fixed column; 313, first cross beam; 3131, first guide rail; 314, second cross beam; 3141, second guide rail; 315, moving column; 316, rotating shaft; 32, laying gripper device; 321, laying motor; 322, gripper screw; 323, moving block; 324, fixed block; 325, support rod; 326, right-angle support; 327, gripper piece; 328, air pump; 329, air inlet hole; 33, fiber winding device; 331, mounting column; 332, winding screw; 333, limiting rod; 334, yarn disc; 335, wire nozzle cantilever; 336, yarn guide roller; 337, wire nozzle; 4, shell. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] The purpose of the present application is to provide a solid rocket engine shell head laying reinforcement system to solve the problems existing in the prior art, which can realize efficient and accurate cutting of reinforcement material, sufficient impregnation and accurate laying, and improve the quality and stability of shell head reinforcement.

[0021] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0022] The present application provides a solid rocket engine shell head laying reinforcement system, as shown in Figure 1 Fig. 1, which comprises a cutting unit 1, an impregnation unit 2 and a laying unit 3; as Figure 2As shown, the cutting unit 1 comprises a cutting frame 11, a cutting device 12 and an angle dial 13, the angle dial 13 and the cutting device 12 are both mounted on the cutting frame 11, the angle dial is used for placing the reinforcing sheet, the cutting device 12 comprises a telescopic swing arm, the telescopic swing arm is used for cutting out the sector-shaped reinforcing sheet; the impregnation unit 2 comprises a vacuum pump 21, an impregnation device and a resin injection device 26, the impregnation device is used for placing the sector-shaped reinforcing sheet, the vacuum pump 21 is connected with the impregnation device and performs vacuumizing on the impregnation device, the resin injection device 26 is connected with the impregnation device and is used for injecting resin into the vacuumized impregnation device; the laying unit 3 comprises a laying frame 31, a laying gripper device 32 and a fiber winding device 33, the laying gripper device 32 and the fiber winding device 33 are both mounted on the laying frame 31, the laying frame 31 has a rotating shaft 316, the solid rocket engine shell 4 is used for being fixedly sleeved outside the rotating shaft 316, the laying gripper device 32 is used for laying the impregnated sector-shaped reinforcing sheet to the head of the solid rocket engine shell 4, and the fiber winding device 33 is used for winding the yarn at both ends of the laid reinforcing sheet.

[0023] The angle scale 13 in the cutting unit 1 is provided with scales in degrees (°), and the reinforcing sheet is placed on the angle scale 13. According to the geometric profile of the target head reinforcing area, the scales on the angle scale 13 can assist in marking the profile boundary, ensure the uniformity of the angle and size of each sector, and provide clear and reliable positioning basis for subsequent cutting operation, reduce cutting errors, and improve the accuracy and efficiency of sector cutting. The telescopic swing arm of the cutting device 12 can realize dynamic adjustment of the cutting track, and combined with the positioning reference of the angle scale 13, it can accurately cut out a sector-shaped reinforcing sheet that is highly matched with the curvature of the head curved surface. Compared with the irregular shape and large size deviation caused by the experience judgment of traditional manual cutting, the cutting unit 1 ensures the initial shape accuracy and size consistency of the reinforcing sheet through mechanical positioning and track control, and lays a foundation for the close fitting with the head curved surface. When cutting the reinforcing sheet, first find the starting angle scale on the angle scale 13 and mark it, then according to the geometric profile of the target head reinforcing area, mark the end angle on the material along the corresponding angle scale line on the scale dial with a marking tool; then extend the telescopic swing arm to the maximum diameter of the sector shape, swing the swing arm from the starting angle to the ending angle to complete the cutting of the sector-shaped large arc; then shorten the telescopic swing arm to the minimum diameter of the sector shape, swing in the same angle range to complete the small arc cutting; finally, extend the telescopic swing arm along the marked radial line to complete the cutting of the two straight lines of the sector shape, and the reinforcing sheet with the required shape is obtained. The cut sector-shaped reinforcing sheet is placed in the impregnation device, the vacuum pump 21 is sealingly connected to the impregnation device through a pipeline, and the impregnation device is subjected to vacuumizing treatment, so that the air in the gap between the fibers of the reinforcing sheet is fully discharged by reducing the air pressure; then, the resin glue injection device 26 injects resin glue into the impregnation device, and under the negative pressure in the vacuum environment, the resin glue can more smoothly and uniformly penetrate into each layer of fiber structure of the reinforcing sheet due to the driving of the pressure difference, thereby improving the impregnation effect; the impregnation unit 2 ensures the full and uniform combination of the reinforcing sheet and the resin, and significantly improves the structural uniformity of the reinforcing sheet and the bonding strength between the reinforcing sheet and the surface of the shell 4, thereby providing protection for the overall mechanical properties after subsequent laying and pasting. The laying and pasting gripper device 32 adopts a multi-degree-of-freedom laying and pasting gripper device 32, which can accurately paste the impregnated reinforcing sheet to the specified area of the head of the shell 4; the laying and pasting rack 31 is provided with a rotating shaft 316, and the solid rocket engine shell 4 is fixedly sleeved outside the rotating shaft 316 through a special clamp, the shell 4 is driven to rotate in a designated direction by driving the rotating shaft 316, so that the fiber winding device 33 winds high-strength yarn on the surface of the laid and pasted reinforcing sheet, and the winding tension of the yarn forms secondary mechanical anchoring on the edge and overall area of the reinforcing sheet, further inhibiting the displacement or peeling risk of the reinforcing sheet during the curing process, and ensuring the close fitting and long-term stability of the reinforcing sheet and the head of the shell 4.

[0024] The solid rocket engine shell 4 head laying reinforcing system effectively solves the problems of poor stability and large process parameter fluctuation in the shell 4 head laying reinforcing process, realizes the standardization and standardization operation of the reinforcing process, improves the bonding strength of the reinforcing sheet and the shell 4, reduces the defect occurrence rate, and provides key technical support for the high-performance and high-reliability manufacturing of the solid rocket engine.

[0025] It is further preferred in the embodiments of the application that the cutting unit 1 further comprises a pressing device 14, the pressing device 14 comprising a moving plate 141, a rotating handle 142, a pressing gear 143, a pressing rack 144 and a pressing plate 145, the moving plate 141 being in sliding connection with the cutting frame 11, the rotating handle 142 being installed on the moving plate 141, the pressing gear 143 being in fixed connection with the rotating handle 142, the pressing rack 144 being in sliding connection with the moving plate 141, the pressing rack 144 being in meshing with the pressing gear 143, the pressing plate 145 being in fixed connection with the pressing rack 144, and rotating the rotating handle 142 can drive the pressing gear 143 to rotate, and in turn drive the pressing rack 144 to ascend or descend along the vertical direction. Figure 3 The cutting unit 1 further comprises a pressing device 14, the pressing device 14 comprising a moving plate 141, a rotating handle 142, a pressing gear 143, a pressing rack 144 and a pressing plate 145, the moving plate 141 being in sliding connection with the cutting frame 11, the rotating handle 142 being installed on the moving plate 141, the pressing gear 143 being in fixed connection with the rotating handle 142, the pressing rack 144 being in sliding connection with the moving plate 141, the pressing rack 144 being in meshing with the pressing gear 143, the pressing plate 145 being in fixed connection with the pressing rack 144, and rotating the rotating handle 142 can drive the pressing gear 143 to rotate, and in turn drive the pressing rack 144 to ascend or descend along the vertical direction.

[0026] It is further preferred in the embodiments of the application that the cutting unit 1 further comprises a pressing device 14, the pressing device 14 comprising a moving plate 141, a rotating handle 142, a pressing gear 143, a pressing rack 144 and a pressing plate 145, the moving plate 141 being in sliding connection with the cutting frame 11, the rotating handle 142 being installed on the moving plate 141, the pressing gear 143 being in fixed connection with the rotating handle 142, the pressing rack 144 being in sliding connection with the moving plate 141, the pressing rack 144 being in meshing with the pressing gear 143, the pressing plate 145 being in fixed connection with the pressing rack 144, and rotating the rotating handle 142 can drive the pressing gear 143 to rotate, and in turn drive the pressing rack 144 to ascend or descend along the vertical direction. Figure 4As shown, the cutting device 12 includes a back plate 121, a swing motor 122, a lifting drive device, a telescopic drive device, a sliding plate 123, a driving gear 124, a driven gear 125, a fixed arm 126, a moving arm 127, and cutting shears 128. The back plate 121 is fixedly connected to the cutting frame 11. The back plate 121 has a vertical slide groove. The sliding plate 123 is slidably connected to the vertical slide groove. The lifting drive device is connected to the sliding plate 123 and is used to drive the sliding plate 123 to slide on the vertical slide groove. The swing motor 122 is fixedly connected to the sliding plate 123. The output shaft of the motor 122 is fixedly connected to the drive gear 124, which meshes with the driven gear 125. One end of the fixed arm 126 has a swing shaft, and the driven gear 125 is fixedly connected to the swing shaft. The swing axis of the swing shaft is parallel to the vertical slide groove. The moving arm 127 is slidably connected to the other end of the fixed arm 126. The telescopic drive device is connected to the moving arm 127 and is used to drive the moving arm 127 to move towards or away from the fixed arm 126. The cutting shears 128 are fixedly connected to the end of the moving arm 127 away from the fixed arm 126. The vertical slide groove on the back plate 121 and the sliding plate 123 cooperate with the driving action of the lifting drive device to flexibly adjust the vertical position of the cutting shears 128. It descends during cutting and rises after cutting to ensure the integrity of the reinforcing sheet. The swing motor 122 transmits its power to the swing shaft of the fixed arm 126 via gear meshing. The swing axis is parallel to the vertical slide groove, ensuring that the swing trajectory of the fixed arm 126 remains in the vertical plane, consistent with the cutting direction of the cutting shears 128. The high precision of the gear transmission allows for accurate control of the swing angle of the fixed arm 126, providing stable power and precision for cutting operations requiring angle control, such as fan-shaped and arc-shaped cuts. The sliding connection between the movable arm 127 and the fixed arm 126 allows for adjustment of the working radius, enhancing the device's versatility. When cutting large fan-shaped cuts, the telescopic drive device extends the movable arm 127, increasing the distance between the cutting shears 128 and the swing shaft. When cutting small fan-shaped cuts, the movable arm 127 retracts to reduce the working radius. The cutting device 12, through three-dimensional adjustment of vertical height, planar angle, and radius range, ensures that the cutting trajectory perfectly matches the preset contour, meeting high-precision cutting requirements.

[0027] A further preferred embodiment of the present invention is, as follows: Figure 5As shown, the impregnation device includes an impregnation frame 22 and an impregnation container. The impregnation container is connected to the impregnation frame 22 and has a cavity, an injection hole, and a vacuum hole. Both the injection hole and the vacuum hole are connected to the cavity, which is used to accommodate the reinforcing sheet. The injection hole is connected to and communicates with the injection device 26, and the vacuum hole is connected to the vacuum pump 21. During operation, after the reinforcing sheet is placed on the lower sealing cover, the upper sealing cover is moved to close it with the lower sealing cover, and the raised sealing strip is embedded in the sealing groove to achieve initial sealing. The vacuum pump 21 is started, and the air in the cavity formed between the two cover plates is extracted through the vacuum extraction hole to create a vacuum environment inside the cavity. The vacuum environment eliminates air bubbles in the cavity, allowing the reinforcing sheet to be fully impregnated. At this time, the prepared resin flows into the sealed cavity through the resin guide nozzle 25 under the pressure difference between the external atmospheric pressure and the negative pressure of the cavity, and comes into full contact with the reinforcing sheet. After a preset time, the resin completely impregnates the fiber gaps of the reinforcing sheet in the vacuum environment, completing the impregnation process. This structure ensures uniform resin impregnation through negative pressure drive, improving the impregnation efficiency and quality of the reinforcing sheet.

[0028] A further preferred embodiment of the present invention is, as follows: Figure 6-7As shown, the impregnation container includes an impregnation base plate 23 and an impregnation cover plate 24. The impregnation base plate 23 is fixedly connected to the impregnation frame 22, and the impregnation cover plate 24 is slidably connected to the impregnation frame 22. The impregnation base plate 23 and the impregnation cover plate 24 are spliced ​​to form a cavity. An injection hole is provided on the impregnation cover plate 24. The injection device 26 includes a guide nozzle 25, which is fixedly connected to the center of the bottom surface of the impregnation cover plate 24 and communicates with the injection hole. An annular groove is formed in the impregnation base plate 23. 231, the impregnated cover plate 24 has an annular sealing strip 241 that matches the annular groove 231. The vacuum hole includes an upper vacuum hole 242 and a lower vacuum hole 232. The annular sealing strip 241 is provided with an upper vacuum hole 242, and the annular groove 231 is provided with a lower vacuum hole 232. The upper vacuum hole 242 and the lower vacuum hole 232 correspond to each other. There are four vacuum holes, and the four vacuum holes are evenly distributed around the annular groove 231. The impregnation unit 2 adopts a closed-type sealed cavity structure. The impregnation cover plate 24 and the impregnation base plate 23 are correspondingly set and can be sealed together. The impregnation cover plate 24 can be moved horizontally to the top of the lower sealing cover plate via the guide rail on the impregnation frame 22. The surface of the impregnation base plate 23 serves as a support platform for the reinforcing sheet to be impregnated. When the impregnation cover plate 24 moves down and closes, the raised annular sealing strip 241 on the edge of the impregnation cover plate 24 and the corresponding annular groove 231 on the edge of the impregnation base plate 23 achieve precise fitting, forming a complete sealed cavity and ensuring the effective maintenance of the vacuum environment. A resin guide nozzle 25 is installed on the top of the impregnation cover plate 24. The resin guide nozzle 25 is placed in the sealed cavity and communicates with the injection hole. The injection hole is connected to the injection device 26 through a pipe to achieve precise injection of resin. Four vacuum holes are evenly distributed around the annular groove 231. When the vacuum pump 21 is started, it performs uniform vacuuming treatment on the inside of the cavity through the four vacuum holes, which can prevent wrinkles from appearing on the reinforcing sheet, ensure the reinforcing sheet is compliant, and effectively eliminate air bubbles in the material gaps, ensuring that the reinforcing sheet and resin are fully and evenly impregnated.

[0029] In a further preferred embodiment of the present invention, the glue dispensing device 26 includes a glue storage container 261, a stirring device 262, a heating device 263, and a glue dispensing pipe. The glue storage container 261 is used to store resin glue. The stirring device 262 is connected to the glue storage container 261 and is used to stir the resin glue. The heating device 263 is connected to the glue storage container 261 and is used to heat the resin glue. One end of the glue dispensing pipe is connected to the glue storage container 261, and the other end is connected to the glue dispensing hole. The resin solution is formed by mixing epoxy resin A and curing agent B in a certain ratio (100:108). The stirring device 262 can ensure that epoxy resin A and curing agent B are fully mixed. Since the resin temperature affects the resin viscosity, when the temperature is between 20 and 40°C, the resin viscosity is relatively low, which is beneficial for wetting the reinforcing sheet and improving the wetting efficiency. Therefore, the heating device 263 can maintain a constant temperature of the resin solution, ensuring that the resin solution is unblocked and has a stable flow rate during transportation, and that the wetting efficiency is high.

[0030] A further preferred embodiment of the present invention is, as follows: Figure 8-9 As shown, the paving frame 31 includes a first fixed column 311, a second fixed column 312, a first crossbeam 313, a second crossbeam 314, and a movable column 315. The first fixed column 311 and the second fixed column 312 are fixedly installed on the ground. The two ends of the first crossbeam 313 are fixedly connected to the top ends of the first fixed column 311 and the second fixed column 312, respectively. The two ends of the second crossbeam 314 are fixedly connected to the bottom ends of the first fixed column 311 and the second fixed column 312, respectively. The first crossbeam 313 has a first guide rail 3131. The two crossbeams 314 have a second guide rail 3141, the first guide rail 3131 is parallel to the second guide rail 3141, the two ends of the movable column 315 are slidably connected to the first guide rail 3131 and the second guide rail 3141 respectively, one end of the rotating shaft 316 is rotatably mounted on the first fixed column 311, the other end of the rotating shaft 316 can pass through the movable column 315, and the movable column 315 can move relative to the rotating shaft 316, and the rotation axis 316 line of the rotating shaft 316 is parallel to the first guide rail 3131. The laying gripper device 32 is mounted on the movable column 315. The movable column 315 is slidably connected at both ends to the first guide rail 3131 and the second guide rail 3141, respectively. By translating along the guide rails, the distance between the movable column 315 and the first fixed column 311 can be dynamically adjusted, thereby changing the effective support length of the rotating shaft 316 passing between the first fixed column 311 and the movable column 315, so as to realize the installation of solid rocket motor shells 4 of different specifications. The laying gripper device 32 is installed on the movable column 315 and moves synchronously with the movable column 315 to realize the precise movement of the laying gripper device 32. It can realize the precise alignment and stable laying of the reinforcing sheet in the designated area of ​​the shell 4 head, ensuring the geometric matching degree and process consistency between the reinforcing sheet and the head surface. Moreover, the rotating shaft 316 drives the shell 4 to rotate synchronously, which can provide key support for subsequent fiber winding reinforcement and overall structural strength improvement.

[0031] A further preferred embodiment of the present invention is, as follows: Figure 10As shown, the paving gripper device 32 includes a paving motor 321, a gripper screw 322, a moving block 323, a fixing block 324, multiple support rods 325, multiple right-angle brackets 326, and multiple gripper plates 327. The paving motor 321 is fixedly connected to the moving column 315. The output shaft of the paving motor 321 is fixedly connected to one end of the gripper screw 322. The fixing block 324 is sleeved on the other end of the gripper screw 322, and the gripper screw 322 can be positioned relative to the fixing block 324. 24 rotates, the moving block 323 is threadedly connected to the gripper screw 322, one end of each right-angle bracket 326 is hinged to the fixed block 324, the other end of each right-angle bracket 326 is hinged to a gripper piece 327, one end of each support rod 325 is hinged to the moving block 323, the other end of each support rod 325 is hinged to the middle of a right-angle bracket 326, and all gripper pieces 327 can be spliced ​​into the shape of the solid rocket motor casing 4 head. When the laying motor 321 starts, the gripper screw 322 rotates, driving the moving block 323 to move along the screw axis. The linear motion of the moving block 323 is converted into the radial opening and closing action of the gripper piece 327 through the support rod 325 and the right-angle bracket 326: when the moving block 323 moves forward, the right-angle bracket 326 rotates outward around its hinge point with the support rod 325, driving the gripper piece 327 to expand outward synchronously, realizing the release of the gripping state, that is, releasing the reinforcing piece; conversely, when the moving block 323 moves backward, the right-angle bracket 326 rotates inward around the hinge point, and the gripper piece 327 converges towards the center under the constraint of the lever bracket. Through the tight fit of the edges of multiple gripper pieces 327, they are finally spliced ​​into a closed ring structure that highly matches the curved surface geometry of the shell 4 end cap, realizing the precise wrapping and pressing of the impregnated fan-shaped reinforcing piece in the designated position of the end cap.

[0032] In a further preferred embodiment of the present invention, the laying gripper device 32 further includes an air pump 328, an air inlet 329 is provided on the outer side wall of the gripper piece 327, an air outlet is provided on the inner side wall of the gripper piece 327, the air inlet 329 is connected to the air outlet, and the air pump 328 is connected to the air inlet 329 through an air pipe. When the gripper 327 grasps the adhesive-impregnated fan-shaped reinforcing sheet, its inner wall first makes initial contact with the reinforcing sheet. Then, after precisely positioning the reinforcing sheet in the designated area of ​​the housing 4 head, the air pump 328 starts and delivers compressed air to the air inlet 329 through the air pipe. The airflow passes through the internal channel of the gripper 327 and exits from the air outlet. This airflow forms an air cushion between the reinforcing sheet and the inner wall of the gripper 327, promoting flexible separation and preventing adhesion. Furthermore, the ejected gas evenly and gently presses the reinforcing sheet onto the curved surface of the housing 4 head, ensuring a tight fit between the reinforcing sheet and the housing. Once the reinforcing sheet is stably bonded to the housing 4 under gas pressure, the air pump 328 stops working. At this point, the laying motor 321 reverses the drive of the lead screw, causing the moving block 323 to expand the lever bracket and gripper 327 outwards, completely separating the gripper 327 from the reinforcing sheet, completing a single laying operation.

[0033] A further preferred embodiment of the present invention is, as follows: Figure 11As shown, the fiber winding device 33 includes a mounting column 331, a winding motor, a winding screw 332, a limiting rod 333, a yarn spool 334, a nozzle cantilever 335, a guide roller 336, and a nozzle 337. The winding motor is mounted on the first fixed column 311. One end of the winding screw 332 is connected to the winding motor, and the other end of the winding screw 332 is rotatably connected to the second fixed column 312. The two ends of the limiting rod 333 are respectively connected to the first fixed column 311 and the second fixed column 312. The winding screw 332 is parallel to the limiting rod 333. The mounting post 331 is threadedly connected to the winding screw 332 and slidably connected to the limiting rod 333. The yarn disc 334 and the nozzle cantilever 335 are fixedly mounted on the mounting post 331. The yarn guide roller 336 and the nozzle 337 are both mounted on the nozzle cantilever 335. The yarn leaving the yarn disc 334 passes through the yarn guide roller 336 and the nozzle 337 in sequence and then reaches the reinforcing sheet laid on the head of the solid rocket motor casing 4. After the reinforcing sheet is laid, the mounting column 331 is driven by the winding screw 332 to move axially along the limiting rod 333. This causes the yarn tray 334, the nozzle cantilever 335, and the guide roller 336 and nozzle 337 fixed thereon to move synchronously. The fiber bundle drawn from the yarn tray 334 is tensioned by the guide roller 336 and then precisely guided to the edge and end area of ​​the reinforcing sheet by the nozzle 337. The rotating shaft 316 drives the housing 4 to rotate synchronously, while the mounting column 331 moves along the axis of the rotating shaft 316. The yarn is tightly wrapped around the reinforcing sheet in a spiral or circumferential manner to prevent the reinforcing sheet from falling off after laying, achieving stable, efficient, and precise end-cap reinforcement. It should be noted that the yarn is only wound around both ends of the reinforcing layer, which ensures both the fixing effect and improves efficiency.

[0034] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A solid rocket motor casing head laying and reinforcement system, characterized in that: Includes cutting unit, glue-impregnation unit, and laying unit; The cutting unit includes a cutting frame, a cutting device, and an angle scale. The angle scale and the cutting device are both mounted on the cutting frame. The angle scale is used to place the reinforcing sheet. The cutting device includes a telescopic swing arm, which is used to cut out a fan-shaped reinforcing sheet. The impregnation unit includes a vacuum pump, an impregnation device, and an injection device. The impregnation device is used to place the fan-shaped reinforcing sheet. The vacuum pump is connected to the impregnation device and evacuates the impregnation device. The injection device is connected to the impregnation device and injects resin into the evacuated impregnation device. The laying unit includes a laying frame, a laying gripper device, and a fiber winding device. Both the laying gripper device and the fiber winding device are mounted on the laying frame. The laying frame has a rotating shaft, and the solid rocket motor casing is used to fix it outside the rotating shaft. The laying gripper device is used to lay the impregnated fan-shaped reinforcing sheet onto the head of the solid rocket motor casing, and the fiber winding device is used to wind yarn onto the laid reinforcing sheet.

2. The solid rocket motor casing head laying and reinforcement system according to claim 1, characterized in that: The cutting unit further includes a clamping device, which includes a movable plate, a rotating handle, a clamping gear, a clamping rack, and a clamping plate. The movable plate is slidably connected to the cutting machine frame. The rotating handle is mounted on the movable plate. The clamping gear is fixedly connected to the rotating handle. The clamping rack is slidably connected to the movable plate and meshes with the clamping gear. The clamping plate is fixedly connected to the clamping rack. Rotating the rotating handle can drive the clamping gear to rotate, thereby driving the clamping rack to rise or fall vertically.

3. The solid rocket motor casing head laying and reinforcement system according to claim 1, characterized in that: The cutting device includes a back plate, a swing motor, a lifting drive device, a telescopic drive device, a sliding plate, a drive gear, a driven gear, a fixed arm, a moving arm, and cutting shears. The back plate is fixedly connected to the cutting frame and has a vertical groove. The sliding plate is slidably connected to the vertical groove. The lifting drive device is connected to the sliding plate and drives the sliding plate to slide on the groove. The swing motor is fixedly connected to the sliding plate, and its output shaft is fixedly connected to the drive gear, which meshes with the driven gear. One end of the fixed arm has a swing shaft, and the driven gear is fixedly connected to the swing shaft. The swing axis of the swing shaft is parallel to the vertical groove. The moving arm is slidably connected to the other end of the fixed arm. The telescopic drive device is connected to the moving arm and drives it to move towards or away from the fixed arm. The cutting shears are fixedly connected to the end of the moving arm away from the fixed arm.

4. The solid rocket motor casing head laying and reinforcement system according to claim 1, characterized in that: The impregnation device includes an impregnation frame and an impregnation container. The impregnation container is connected to the impregnation frame. The impregnation container has a cavity, an injection hole, and a vacuum hole. The injection hole and the vacuum hole are both connected to the cavity. The cavity is used to accommodate the reinforcing sheet. The injection hole is connected to and communicates with the injection device. The vacuum hole is connected to the vacuum pump.

5. The solid rocket motor casing head laying and reinforcement system according to claim 4, characterized in that: The impregnation container includes an impregnation base plate and an impregnation cover plate. The impregnation base plate is fixedly connected to the impregnation frame, and the impregnation cover plate is slidably connected to the impregnation frame. The impregnation base plate and the impregnation cover plate are spliced ​​together to form the cavity. The impregnation cover plate is provided with the glue injection hole. The glue injection device includes a guide nozzle, which is fixedly connected to the center of the bottom surface of the impregnation cover plate and communicates with the glue injection hole. The impregnation base plate has an annular groove, and the impregnation cover plate has an annular sealing strip that matches the annular groove. The vacuum hole includes an upper vacuum hole and a lower vacuum hole. The upper vacuum hole is provided on the annular sealing strip, and the lower vacuum hole is provided on the annular groove. The upper vacuum hole and the lower vacuum hole correspond to each other. There are four vacuum holes, and the four vacuum holes are evenly distributed along the circumference of the annular groove.

6. The solid rocket motor casing head laying and reinforcement system according to claim 4, characterized in that: The glue dispensing device includes a glue storage container, a stirring device, a heating device, and a glue dispensing pipe. The glue storage container is used to store resin glue. The stirring device is connected to the glue storage container and is used to stir the resin glue. The heating device is connected to the glue storage container and is used to heat the resin glue. One end of the glue dispensing pipe is connected to the glue storage container, and the other end is connected to the glue dispensing hole.

7. The solid rocket motor casing head laying and reinforcement system according to claim 1, characterized in that: The paving frame includes a first fixed column, a second fixed column, a first crossbeam, a second crossbeam, and a movable column. The first fixed column and the second fixed column are fixedly installed on the ground. The two ends of the first crossbeam are fixedly connected to the top ends of the first fixed column and the second fixed column, respectively. The two ends of the second crossbeam are fixedly connected to the bottom ends of the first fixed column and the second fixed column, respectively. The first crossbeam has a first guide rail, and the second crossbeam has a second guide rail. The first guide rail and the second guide rail are parallel. The two ends of the movable column are slidably connected to the first guide rail and the second guide rail, respectively. The rotating shaft is rotatably installed on the first fixed column, and the rotation axis of the rotating shaft is parallel to the first guide rail. The paving gripper is installed on the movable column.

8. The solid rocket motor casing head laying and reinforcement system according to claim 7, characterized in that: The paving gripper device includes a paving motor, a lead screw, a moving block, a fixed block, multiple support rods, multiple right-angle brackets, and multiple gripper pieces. The paving motor is fixedly connected to the moving column, and the output shaft of the paving motor is fixedly connected to one end of the paving lead screw. The fixed block is sleeved on the other end of the paving lead screw, and the paving lead screw can rotate relative to the fixed block. The moving block is threadedly connected to the paving lead screw. One end of each right-angle bracket is hinged to the fixed block, and the other end of each right-angle bracket is hinged to one of the gripper pieces. One end of each support rod is hinged to the moving block, and the other end of each support rod is hinged to the middle of one of the right-angle brackets. All the gripper pieces can be assembled into the shape of a solid rocket motor casing head.

9. The rocket engine casing head laying reinforcement system according to claim 8, characterized in that: The paving gripper device also includes an air pump. The outer side wall of the gripper plate has an air inlet, and the inner side wall of the gripper plate has an air outlet. The air inlet and the air outlet are connected, and the air pump is connected to the air inlet through an air pipe.

10. The rocket engine casing head laying reinforcement system according to claim 7, characterized in that: The fiber winding device includes a mounting column, a winding motor, a winding screw, a limiting rod, a yarn reel, a yarn nozzle cantilever, a yarn guide roller, and a yarn nozzle. The winding motor is mounted on the first fixed column. One end of the winding screw is connected to the winding motor, and the other end of the winding screw is rotatably connected to the second fixed column. Both ends of the limiting rod are fixedly connected to the first fixed column and the second fixed column, respectively. The winding screw is parallel to the limiting rod. The mounting column is threadedly connected to the winding screw, and the mounting column is slidably connected to the limiting rod. The yarn reel and the yarn nozzle cantilever are fixedly mounted on the mounting column. The yarn guide roller and the yarn nozzle are both mounted on the yarn nozzle cantilever. The yarn leaving the yarn reel passes through the yarn guide roller and the yarn nozzle in sequence before reaching the reinforcing sheet laid on the head of the solid rocket motor casing.

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