A solid rocket engine combustion chamber coating apparatus

Abstract

The present application relates to the technical field of solid engine manufacturing, and particularly relates to a solid engine combustion chamber coating device. The device comprises an assembly support, a rotating clamping unit, a supporting and pressing unit, a coating execution unit and a glue supply unit arranged on the assembly support in sequence. The rotating clamping unit fixes the workpiece through air claws and V-shaped clamping blocks, and is driven to rotate by a motor. The supporting and pressing unit adopts a pressing cylinder and adjustable-spacing nylon rollers to ensure the axial positioning and stability of the workpiece. The coating execution unit integrates lifting, rotating and transverse feeding functions, and the glue head is adaptively attached to the inner wall of the workpiece through a flexible contact mechanism. The glue supply unit is equipped with a constant-temperature glue barrel and an electric glue pushing mechanism to ensure uniform output of the glue liquid. Through multi-axis linkage and flexible control, the coating efficiency and coating quality are significantly improved, and the device is suitable for solid engine combustion chambers of different sizes.

Description

Technical Field

[0001] This invention relates to the field of solid rocket motor manufacturing technology, and in particular to a solid rocket motor combustion chamber coating apparatus. Background Technology

[0002] Solid combustion engine combustion chambers require an insulating / flame-retardant coating on their metal inner walls. Traditional coating processes suffer from the following problems: Manual coating is inefficient, relying on hand tools and resulting in uneven coating thickness, bubbles, or missed areas; positioning accuracy is insufficient, as existing mechanical devices struggle to adapt to combustion chamber workpieces of varying diameters or lengths, leading to adhesive trajectory deviations; flexible contact is lacking, as rigid applicator heads easily scratch the workpiece surface and cannot adapt to the curvature of the inner wall; and adhesive supply stability is poor, with fluctuations in adhesive temperature or pressure affecting coating quality. Summary of the Invention

[0003] To address the aforementioned problems, the present invention aims to provide a solid fuel engine combustion chamber coating device that integrates rotary clamping, multi-axis linkage, flexible adhesive application, and constant temperature adhesive supply.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] This invention provides a solid combustion chamber coating device for a solid rocket motor, comprising a rotary clamping unit, a support and clamping unit, a coating execution unit, an adhesive supply unit, and an assembly bracket. The rotary clamping unit and the support and clamping unit are disposed at one end of the assembly bracket. The rotary clamping unit is used to clamp and drive the workpiece to rotate. The support and clamping unit is located in front of the rotary clamping unit and is used to support and clamp the workpiece. The coating execution unit and the adhesive supply unit are disposed at the other end of the assembly bracket. The coating execution unit is used to coat the workpiece, and the adhesive supply unit provides adhesive to the coating execution unit.

[0006] The rotary clamping unit includes a rotary drive motor reducer, a rotary drive motor, a rotary support base, a slip ring stator support, a pneumatic slip ring, a rotary shaft, and a gripper mechanism. The rotary support base is mounted on the assembly bracket, the rotary drive motor reducer is mounted on the rotary support base and its input end is connected to the rotary drive motor, and the output end of the rotary drive motor reducer is connected to the gripper mechanism through the rotary shaft. A pneumatic slip ring is integrated on the rotary shaft, and the stator of the pneumatic slip ring is connected to the rotary support base through the slip ring stator support.

[0007] The gripper mechanism includes a gripper support A, an end support, a pneumatic gripper adapter plate, a stop A, a stop B, an axial positioning support, a parallel pneumatic gripper mounting plate, a gripper telescopic cylinder, a gripper support B, a gripper sliding shaft, a gripper sliding guide support, a gripper sliding compression spring, a limiting soft block, a limiting hard block, a limiting pad, and a V-shaped gripper. The parallel pneumatic gripper mounting plate is connected to the rotating shaft, and the gripper telescopic cylinder is mounted on the parallel pneumatic gripper mounting plate. The gripper support A and gripper support B are connected by the pneumatic gripper. The adapter plate is connected to the output ends of the gripper telescopic cylinder on both sides. The V-shaped clamping block is set on the clamping block support A, and the limiting pad is set on the working surface of the V-shaped clamping block. The limiting hard block is slidably connected to the clamping block support B through two clamping block sliding shafts. The ends of the clamping block sliding shafts are axially limited by the clamping block sliding guide support. Each clamping block sliding shaft is fitted with a clamping block sliding compression spring. The clamping block sliding compression spring is limited between the limiting hard block and the clamping block support B. The limiting soft block is set on the outer surface of the limiting hard block.

[0008] The parallel gripper mounting plate is connected to two stops A via two axial positioning supports. The two stops A are connected by a stop B. The end support is set on the stop B and is located between the clamping block support A and the clamping block support B.

[0009] The support and clamping unit includes a transverse drive mechanism, a clamping beam, a transverse support base, an upper clamping mechanism, and a lower support mechanism. The transverse drive mechanism is mounted on the assembly bracket, and the transverse support base and clamping beam are both mounted on the transverse drive mechanism. The transverse drive mechanism is used to drive the transverse support base and clamping beam to move in a transverse linear motion. The lower support mechanism is mounted on the top of the transverse support base and is used to support the workpiece. The upper clamping mechanism is mounted on the clamping beam and is used to clamp the workpiece onto the lower support mechanism.

[0010] The upper clamping mechanism includes a clamping cylinder, a linear bearing mounting plate, a clamping sliding guide support, a clamping sliding compression spring, a sliding shaft, a small-sized nylon support roller assembly, a pressure roller assembly mounting plate, and a clamping stop. The clamping cylinder is mounted on the clamping beam, and its output end is connected to the linear bearing mounting plate. The pressure roller assembly mounting plate is located below the linear bearing mounting plate. Multiple sliding shafts are located above the pressure roller assembly mounting plate, and these sliding shafts are connected to the linear bearing mounting plate via linear bearings. The upper ends of the sliding shafts are axially limited by the clamping sliding guide support. Each sliding shaft is fitted with a clamping sliding compression spring, which is constrained between the linear bearing mounting plate and the pressure roller assembly mounting plate. A clamping stop is located below the linear bearing mounting plate. A small-sized nylon support roller assembly is mounted at the bottom of the pressure roller assembly mounting plate.

[0011] The lower support mechanism includes a roller support base, a drive motor for adjusting the support spacing, a large-size nylon support roller assembly, a mirror-oriented extension support, a guide rail slider assembly for adjusting the support spacing, a lead screw slide for adjusting the support spacing, and an extension support. The guide rail slider assembly and the lead screw slide for adjusting the support spacing are longitudinally mounted on the transverse support base. The drive motor for adjusting the support spacing is mounted on the transverse support base, and its output end is connected to the lead screw slide for adjusting the support spacing. The two output ends of the lead screw slide for adjusting the support spacing are respectively connected to the extension support and the mirror-oriented extension support. Both the extension support and the mirror-oriented extension support are connected to the guide rail slider assembly for adjusting the support spacing. The lead screw slide for adjusting the support spacing drives the extension support and the mirror-oriented extension support to move closer or further apart. The guide rail slider assembly for adjusting the support spacing provides guidance. Large-size nylon support roller assemblies are symmetrically arranged on the extension support and the mirror-oriented extension support.

[0012] The lateral drive mechanism includes a horizontal lead screw slide, a support and clamping unit guide rail slider assembly, a horizontal drive motor, a horizontal drive motor reducer, a horizontal drive motor reducer seat, a lead screw bearing seat support, a lead screw nut seat, a proximity switch baffle, and a proximity switch assembly. The horizontal lead screw slide and the support and clamping unit guide rail slider assembly are laterally mounted on the assembly bracket. The horizontal drive motor reducer seat is located at the end of the horizontal lead screw slide, and the horizontal drive motor reducer is mounted on the horizontal drive motor reducer seat with its input end connected to the horizontal drive motor. The output end of the horizontal drive motor reducer is connected to the horizontal lead screw slide. The horizontal lead screw slide is supported by the lead screw bearing seat. The horizontal lead screw slide is connected to the lateral support seat via the lead screw nut seat. Two support and clamping unit guide rail slider assemblies are connected to each side of the lateral support seat. A proximity switch baffle is mounted on the support and clamping unit guide rail slider assembly, and a proximity switch assembly is mounted on the lateral support seat.

[0013] The coating execution unit includes a three-degree-of-freedom motion platform, a coating rod, a flexible contact mechanism, a limiting plate, a coating rod rotation drive motor, a rod support guide rail, a flexible contact guide rail slider assembly, an axial limiting plate, an extension rod clamping seat, an extension rod clamping cover, and a transition plate. The three-degree-of-freedom motion platform is mounted on the assembly bracket. The coating rod rotation drive motor is mounted on the three-degree-of-freedom motion platform, and its output end is connected to the rod support guide rail. The rod support guide rail is connected to the three-degree-of-freedom motion platform via the flexible contact guide rail slider assembly. The extension rod clamping seat is connected to the rod support guide rail via the transition plate. The extension rod clamping cover cooperates with the extension rod clamping seat to clamp the coating rod. The axial limiting plate is mounted on the transition plate to constrain the axial movement of the coating rod and ensure the stability of the rotation center. The flexible contact mechanism is located at the front end of the rod support guide rail. The coating rod rotation drive motor is used to form a spiral coating trajectory through the axial feed and rotational motion of the coating head of the coating rod.

[0014] The flexible contact mechanism includes a guide shaft fixing plate, a glue-applying rod flexible contact spring, a glue-applying rod flexible contact spring guide shaft, a glue-applying rod flexible contact guide plate, and a glue-applying rod flexible contact guide support seat. The guide shaft fixing plate is fixed to the three-degree-of-freedom motion platform, the glue-applying rod flexible contact guide support seat is fixed to the rod support guide rail seat, the glue-applying rod flexible contact spring guide shaft is slidably connected to the glue-applying rod flexible contact guide support seat, and its end is axially limited by the glue-applying rod flexible contact guide plate. The glue-applying rod flexible contact spring is sleeved on the glue-applying rod flexible contact spring guide shaft, and one end abuts against the glue-applying rod flexible contact guide support seat. The glue-applying rod flexible contact spring guide shaft makes flexible contact with the guide shaft fixing plate under the elastic force of the glue-applying rod flexible contact spring.

[0015] The three-degree-of-freedom motion platform includes a glue-applying rod lifting drive motor, a glue-applying rod lifting drive electric cylinder, a vertical guide rail base, a glue-applying rod lifting slide plate, a glue-applying rod lifting guide rail slider assembly, a lifting proximity switch assembly, a lifting proximity switch stop plate, a vertical support base, a glue-applying rod feed drive motor, a glue-applying rod feed drive electric cylinder, a glue-applying rod feed linear module, a glue-applying rod feed linear module support base, a glue-applying rod lateral movement drive handwheel, a glue-applying rod lateral movement linear module, a limit rod, a limit support, and a glue-applying rod... The assembly includes a glue rod transverse guide rail base, a glue rod transverse guide rail slider assembly, and a slider pad. The glue rod transverse linear module and two glue rod transverse guide rail bases are mounted on the assembly bracket. The glue rod transverse drive handwheel is connected to the end of the glue rod transverse linear module. A glue rod transverse guide rail slider assembly is longitudinally mounted on the glue rod transverse guide rail base. A limiting support is provided at the end of each glue rod transverse guide rail slider assembly, and a limiting rod is provided on the limiting support. The two glue rod transverse guide rail slider assemblies are equipped with… A slider pad is placed on the two slider pads. The glue-applying rod feed linear module support is placed horizontally on the two slider pads. The glue-applying rod feed linear module is set on the glue-applying rod feed linear module support, and the end of the glue-applying rod feed linear module is connected to the glue-applying rod feed drive electric cylinder and the glue-applying rod feed drive motor in sequence. The vertical support is connected to the output end of the glue-applying rod feed linear module. The vertical guide rail is set on the vertical support. The glue-applying rod lifting guide rail slider assembly is set on the vertical guide rail. The glue-applying rod lifting slide plate is connected to the glue-applying rod lifting guide rail slider assembly. The glue-applying rod lifting drive electric cylinder is set on the vertical support, and its input end is connected to the glue-applying rod lifting drive motor. The output end of the glue-applying rod lifting drive electric cylinder is connected to the glue-applying rod lifting slide plate. The lifting proximity switch assembly is set on the vertical guide rail. The lifting proximity switch baffle is set on the glue-applying rod lifting slide plate. The lifting proximity switch baffle cooperates with the lifting proximity switch assembly to detect the lifting position of the glue-applying rod.

[0016] The glue supply unit includes a glue supply pipe, a glue bucket, a glue bucket clamp cover, a ceramic electric heating coil, a piston assembly, a floating joint, a guide optical shaft, a piston telescopic electric cylinder, an electric cylinder drive motor, an electric cylinder support base, a glue supply proximity switch baffle, a glue supply proximity switch assembly, a glue bucket clamp base, and a glue bucket end limiter. The electric cylinder support base and the glue bucket clamp base are mounted on the assembly bracket. The glue bucket is fixed to the glue bucket clamp base by the glue bucket clamp cover and axially limited by the glue bucket end limiter. One end of the glue bucket has a plug assembly, and the other end supplies glue to the coating execution unit through the glue supply pipe. A ceramic electric heating coil is located on the outer side of the glue bucket. The piston telescopic electric cylinder is mounted on the electric cylinder support base and connected to the electric cylinder drive motor. The output end of the piston telescopic electric cylinder is connected to the piston assembly through a floating joint. The output end of the piston telescopic electric cylinder is guided by two sets of guide optical shafts passing through holes in the electric cylinder support base. The glue supply proximity switch assembly is mounted on the assembly bracket, and the glue supply proximity switch baffle is located at the output end of the piston telescopic electric cylinder.

[0017] The advantages and positive effects of this invention are as follows:

[0018] Significantly improved coating accuracy and quality: This invention drives the workpiece to rotate at a uniform speed through a rotary clamping unit, while the coating execution unit performs precise axial feeding. The linkage of the two axes forms a stable spiral coating trajectory, which ensures uniform coating thickness and effectively avoids defects such as bubbles and missed coating. The flexible contact mechanism, through a spring-buffered design, allows the coating head to adaptively conform to the inner wall of the workpiece, avoiding scratches on the workpiece surface and reducing defects such as bubbles and missed coating, thus ensuring the uniformity and integrity of the coating.

[0019] High adaptability and versatility: The present invention adopts a modular design, with a floating clamping structure of the rotating clamping unit and an adjustable spacing mechanism of the support and pressing unit, which can be adapted to combustion chamber workpieces of different diameters and lengths. It can achieve rapid changeover without complicated adjustments, reducing the adaptation cost for workpieces of different specifications.

[0020] Coating efficiency is greatly improved: This invention adopts an automated integrated design to replace traditional manual coating. The processes of workpiece clamping, positioning, pressing, coating, and glue supply are executed in a continuous manner, reducing the time spent on manual intervention. Constant temperature glue supply and stable pressure control ensure continuous and uniform glue output, avoiding efficiency loss caused by glue supply interruption or fluctuation, and significantly improving overall production efficiency.

[0021] Optimized operational safety and convenience: This invention adopts mechanized operation to reduce the labor intensity of manual hand-held tool operation and reduce safety risks; the structure of each unit is compact, the air circuit and circuit are transmitted in an orderly manner through air-electric slip rings, and key moving parts are equipped with proximity switches and other limit components to ensure the stability of equipment operation and operational safety; the glue tank adopts a quick disassembly and assembly design, which facilitates glue replenishment and equipment maintenance.

[0022] Stable glue supply and consistent coating: The ceramic electric heating coil of the glue supply unit of this invention achieves constant temperature control to prevent glue curing and ensure stable glue performance; the electric glue pushing mechanism, combined with stroke monitoring, accurately controls the glue supply amount and pressure, avoids the impact of glue temperature or pressure fluctuations on coating quality, and ensures the consistency of coating performance in mass production.

[0023] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0024] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of a solid combustion chamber coating device for an engine according to the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the rotary clamping unit of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the support and clamping unit of the present invention;

[0029] Figure 4 This is a schematic diagram of the coating execution unit of the present invention;

[0030] Figure 5 This is a schematic diagram of the adhesive supply unit of the present invention.

[0031] In the diagram: 1 is the rotary clamping unit, 2 is the support and clamping unit, 3 is the workpiece, 4 is the coating execution unit, 5 is the glue supply unit, 6 is the assembly bracket, 7 is the clamping block support seat A, 8 is the end support, 9 is the pneumatic gripper adapter plate, 10 is the stop block A, 11 is the stop block B, 12 is the axial positioning support, 13 is the parallel pneumatic gripper mounting plate, 14 is the rotary drive motor reducer, 15 is the rotary drive motor, 16 is the rotary support seat, 17 is the slip ring stator support, 18 is the pneumatic slip ring, 19 is the rotary shaft, 20 is the gripper telescopic cylinder, 21 is the clamping block support seat B, 22 is the clamping block sliding shaft, 23 is the clamping block sliding guide support, 24 is the clamping block sliding compression spring, 25 is the limiting soft block, 26 is the limiting hard block, 27 is the limiting pad block, and 28 is the V-shaped clamping block. 29 is the clamping beam, 30 is the clamping cylinder, 31 is the linear bearing mounting plate, 32 is the clamping sliding guide support, 33 is the clamping sliding compression spring, 34 is the sliding shaft, 35 is the pressure roller seat, 36 is nylon roller I, 37 is the roller support seat, 38 is the drive motor for adjusting the support spacing, 39 is the nylon roller II, 40 is the support wheel bearing seat, 41 is the mirror extension support, 42 is the transverse support seat, 43 is the support clamping unit guide rail slider assembly, 44 is the horizontal drive motor, 45 is the horizontal drive motor reducer, 46 is the horizontal drive motor reducer seat, 47 is the lead screw bearing seat support, 48 is the lead screw nut seat, 49 is the proximity switch stop plate, 50 is the proximity switch assembly, 51 is the adjusting shim, 52 is the horizontal lead screw slide, and 53 is the adjusting support. The components include: a spacing guide rail slider assembly; 54, an adjustment support spacing screw slide table; 55, an extension support; 56, a pressure roller assembly mounting plate; 57, a clamping block; 58, a housing extension rod; 59, an extension rod adapter; 60, a fixed length rod; 61, a guide shaft fixing plate; 62, a glue applicator rod flexible contact spring; 63, a glue applicator rod flexible contact spring guide shaft; 64, a glue applicator rod flexible contact guide plate; 65, a glue applicator rod lifting drive motor; 66, a glue applicator rod lifting drive electric cylinder; 67, a glue applicator rod flexible contact guide support seat; 68, a limit plate; 69, a vertical guide rail seat; 70, a glue applicator rod lifting slide plate; 71, a glue applicator rod rotation drive motor; 72, a glue applicator rod lifting guide rail slider assembly; 73, a lifting proximity switch assembly; and 74, a lifting proximity switch stop plate. 75 is the rod support guide rail seat; 76 is the flexible contact guide rail slider assembly; 77 is the vertical support seat; 78 is the glue applicator rod feed drive motor; 79 is the glue applicator rod feed drive electric cylinder; 80 is the glue applicator rod feed linear module; 81 is the glue applicator rod feed linear module support seat; 82 is the axial limiting plate; 83 is the extension rod clamping seat; 84 is the extension rod clamping cover; 85 is the transition plate; 86 is the glue applicator rod lateral movement drive handwheel; 87 is the glue applicator rod lateral movement linear module; 88 is the limiting rod; 89 is the limiting support; 90 is the glue applicator rod lateral movement guide rail seat; 91 is the glue applicator rod lateral movement guide rail slider assembly; 92 is the slider pad; 93 is the glue applicator head; 94 is the extension rod adapter; 95 is the glue supply pipe; 96 is the glue bucket; 97 is the glue bucket clamp cover; 98 is the ceramic electric heating coil.99 is the piston, 100 is the connecting threaded sleeve, 101 is the floating joint, 102 is the guide shaft, 103 is the piston telescopic electric cylinder, 104 is the electric cylinder drive motor, 105 is the electric cylinder support base, 106 is the glue supply proximity switch baffle, 107 is the glue supply proximity switch assembly, 108 is the long-end push rod, 109 is the short-end push rod, 110 is the glue bucket clamp seat, and 111 is the glue bucket end limit. Detailed Implementation

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0034] See Figure 1 As shown, the present invention provides a solid combustion chamber coating device for a solid rocket motor, comprising a rotary clamping unit 1, a support and clamping unit 2, a coating execution unit 4, an adhesive supply unit 5, and an assembly bracket 6. The rotary clamping unit 1 and the support and clamping unit 2 are disposed at one end of the assembly bracket 6. The rotary clamping unit 1 is used to clamp and drive the workpiece 3 to rotate. The support and clamping unit 2 is located in front of the rotary clamping unit 1 and is used to support and clamp the workpiece 3. The coating execution unit 4 and the adhesive supply unit 5 are disposed at the other end of the assembly bracket 6. The coating execution unit 4 is used to coat the workpiece 3, and the adhesive supply unit 5 provides adhesive to the coating execution unit 4.

[0035] See Figure 2 As shown, in an embodiment of the present invention, the rotary clamping unit 1 includes a rotary drive motor reducer 14, a rotary drive motor 15, a rotary support base 16, a slip ring stator support 17, a pneumatic slip ring 18, a rotary shaft 19, and a gripper mechanism. The rotary support base 16 is mounted on the assembly bracket 6, the rotary drive motor reducer 14 is mounted on the rotary support base 16 and its input end is connected to the rotary drive motor 15, and the output end of the rotary drive motor reducer 14 is connected to the gripper mechanism through the rotary shaft 19. The pneumatic slip ring 18 is integrated on the rotary shaft 19, and the stator of the pneumatic slip ring 18 is connected to the rotary support base 16 through the slip ring stator support 17.

[0036] In an embodiment of the present invention, the gripper mechanism includes a gripper support A7, an end support 8, a pneumatic gripper adapter plate 9, a stop block A10, a stop block B11, an axial positioning support 12, a parallel pneumatic gripper mounting plate 13, a gripper telescopic cylinder 20, a gripper support B21, a gripper sliding shaft 22, a gripper sliding guide support 23, a gripper sliding compression spring 24, a limiting soft block 25, a limiting hard block 26, a limiting pad 27, and a V-shaped gripper 28. The parallel pneumatic gripper mounting plate 13 is connected to the rotating shaft 19. The gripper telescopic cylinder 20 is mounted on the parallel pneumatic gripper mounting plate 13. The gripper support A7 and gripper support B21 are connected to the two output ends of the gripper telescopic cylinder 20 via the pneumatic gripper adapter plate 9. The V-shaped gripper 28 is mounted on the gripper support A7. Positioning pad 27 is disposed on the working surface of V-shaped clamping block 28; limiting hard block 26 is slidably connected to clamping block support B21 through two clamping block sliding shafts 22, the ends of clamping block sliding shafts 22 are axially limited by clamping block sliding guide support 23, each clamping block sliding shaft 22 is sleeved with a clamping block sliding compression spring 24, the clamping block sliding compression spring 24 is limited between the limiting hard block 26 and clamping block support B21, and limiting soft block 25 is disposed on the outer surface of limiting hard block 26; parallel pneumatic gripper mounting plate 13 is connected to two stops A10 through two axial positioning supports 12, the two stops A10 are connected by stops B11, end support 8 is disposed on stops B11, and end support 8 is located between clamping block support A7 and clamping block support B21.

[0037] In this embodiment, the rotary clamping unit 1 is driven by a rotary drive motor 15 through a rotary drive motor reducer 14 to drive a rotary shaft 19, and a gripper telescopic cylinder 20 drives a V-shaped clamping block 28 to clamp the workpiece 3; the rotary shaft 19 integrates a pneumatic-electric slip ring 18 to realize synchronous transmission of air and electricity; the symmetrically arranged clamping block support A7 and clamping block support B21 achieve floating clamping through a clamping block sliding shaft 22 and a clamping block sliding compression spring 24.

[0038] Limiting pad 27 and limiting soft block 25 are respectively connected to V-shaped clamping block 28 and limiting hard block 26 to provide flexible contact for clamping; the controllable gripper telescopic cylinder 20 realizes the clamping and release of workpiece 3, and the stop block A10 and stop block B11 limit the axial and radial displacement of the end support 8. The gripper telescopic cylinder 20 and the required external air source and related air circuit connectors are commercially available products, and their movement is controlled by an external control system; the air circuit and electrical circuit are both transmitted to the external control system of the rotary clamping unit 1 through the pneumatic-electric slip ring 18, which is a commercially available product.

[0039] In this embodiment of the invention, the rotary clamping unit 1, through a composite limiting structure of V-shaped clamping block 28, limiting hard block 26, and limiting soft block 25, and driven by the jaw telescopic cylinder 20, achieves radially uniform clamping of the workpiece 3, avoiding workpiece displacement caused by uneven clamping force and ensuring coaxiality during rotation. The clamping block sliding compression spring 24 and the clamping block sliding shaft 22 form a floating clamping mechanism, which, combined with the flexible contact design of the limiting soft block 25, effectively buffers the clamping force, avoids scratching the workpiece surface, and is suitable for combustion chamber workpieces of different materials. The rotary shaft 19 integrates a pneumatic-electric slip ring 18, realizing synchronous and stable transmission of the air path (driving jaw) and circuit during rotation, eliminating concerns about wire entanglement and improving the reliability of continuous equipment operation. Through the cooperation of axial positioning support, stop A 10, and stop B 11, the axial and radial displacement of the end support is limited, further enhancing the workpiece positioning accuracy and laying the foundation for the accuracy of subsequent coating trajectory.

[0040] See Figure 3 As shown in the embodiment of the present invention, the support and clamping unit 2 includes a transverse drive mechanism, a clamping beam 29, a transverse support base 42, an upper clamping mechanism, and a lower support mechanism. The transverse drive mechanism is mounted on the assembly bracket 6. The transverse support base 42 and the clamping beam 29 are both mounted on the transverse drive mechanism. The transverse drive mechanism is used to drive the transverse support base 42 and the clamping beam 29 to move in a transverse linear motion. The lower support mechanism is mounted on the top of the transverse support base 42 and is used to support the workpiece. The upper clamping mechanism is mounted on the clamping beam 29 and is used to clamp the workpiece onto the lower support mechanism.

[0041] In embodiments of the present invention, the upper clamping mechanism includes a clamping cylinder 30, a linear bearing mounting plate 31, a clamping sliding guide support 32, a clamping sliding compression spring 33, a sliding shaft 34, a pressure roller seat 35, a nylon roller I 36, a pressure roller assembly mounting plate 56, and a clamping stop block 57. The clamping cylinder 30 is mounted on the clamping beam 29, and its output end is connected to the linear bearing mounting plate 31. The pressure roller assembly mounting plate 56 is located below the linear bearing mounting plate 31, and multiple sliding shafts 34 are provided above the pressure roller assembly mounting plate 56. Multiple sliding shafts 34 are connected to the linear bearing mounting plate 31 via linear bearings. The upper end of the sliding shaft 34 is axially limited by the pressing sliding guide support 32. Each sliding shaft 34 is fitted with a pressing sliding compression spring 33, which is constrained between the linear bearing mounting plate 31 and the pressure roller assembly mounting plate 56. A pressing stop 57 is provided below the linear bearing mounting plate 31. Multiple pairs of nylon rollers I 36 are mounted on the bottom of the pressure roller assembly mounting plate 56 via the pressure roller seat 35, forming a small-sized nylon support roller assembly.

[0042] In an embodiment of the present invention, the lower support mechanism includes a roller support seat 37, a support spacing adjustment drive motor 38, a nylon roller II 39, a support wheel bearing seat 40, a mirror extension support 41, a support spacing adjustment guide rail slider assembly 53, a support spacing adjustment screw slide 54, and an extension support 55. The support spacing adjustment guide rail slider assembly 53 and the support spacing adjustment screw slide 54 are longitudinally arranged on the transverse support seat 42 and leveled by adjusting shims 51. The support spacing adjustment drive motor 38 is arranged on the transverse support seat 42, and its output end is connected to the support spacing adjustment screw slide 54. The two output ends of the support spacing screw slide 54 are connected to the extension support 55 and the mirror extension support 41 respectively. Both the extension support 55 and the mirror extension support 41 are connected to the support spacing adjustment guide rail slider assembly 53. The support spacing adjustment screw slide 54 drives the extension support 55 and the mirror extension support 41 to move closer or further apart from each other, and the support spacing adjustment guide rail slider assembly 53 provides guidance. Multiple roller support seats 37 are symmetrically arranged on the extension support 55 and the mirror extension support 41. Nylon rollers II 39 are installed on each roller support seat 37 through the support wheel bearing seat 40, forming a large-size nylon support roller assembly.

[0043] In an embodiment of the present invention, the lateral drive mechanism includes a horizontal lead screw slide 52, a support and clamping unit guide rail slider assembly 43, a horizontal drive motor 44, a horizontal drive motor reducer 45, a horizontal drive motor reducer seat 46, a lead screw bearing seat support 47, a lead screw nut seat 48, a proximity switch stop plate 49, and a proximity switch assembly 50. The horizontal lead screw slide 52 and the support and clamping unit guide rail slider assembly 43 are arranged laterally on the assembly bracket 6. The horizontal drive motor reducer seat 46 is located at the end of the horizontal lead screw slide 52, and the horizontal drive motor reducer 45... The horizontal drive motor reducer 45 is mounted on the horizontal drive motor reducer 46 and its input end is connected to the horizontal drive motor 44. The output end of the horizontal drive motor reducer 45 is connected to the horizontal lead screw slide 52. The horizontal lead screw slide 52 is supported by the lead screw bearing seat support 47. The horizontal lead screw slide 52 is connected to the transverse support seat 42 through the lead screw nut seat 48. The two sides of the transverse support seat 42 are respectively connected to two support and clamping unit guide rail slider assemblies 43. The support and clamping unit guide rail slider assembly 43 is provided with a proximity switch baffle 49, and the transverse support seat 42 is provided with a proximity switch assembly 50.

[0044] In this embodiment, the support and clamping unit 2 is driven by the clamping cylinder 30, so that two sets of nylon rollers I 36 and three sets of nylon rollers II 39 cooperate to clamp the workpiece 3; the horizontal lead screw slide 52 and the lead screw slide 54 for adjusting the support spacing realize the horizontal and vertical position adjustment.

[0045] Specifically, in this embodiment, the pressing sliding guide support 32 and the sliding shaft 34 cooperate, and the pressing sliding compression spring 33 provides buffering force to prevent the workpiece from being deformed by overpressure. There are two sets of small-sized nylon support roller assemblies, both of which are installed on the pressure roller assembly mounting plate 56 and correspond to the position of the sliding shaft 34. The two sets of roller support seats 37 are symmetrically arranged and are respectively installed on the adjusting support spacing screw slide table 54. The two sets of roller support seats 37 are connected to the transverse support seat 42 through the adjusting support spacing guide rail slider assembly 53 to ensure smooth movement. The two sets of roller support seats 37 are respectively equipped with mirror extension support 41 and extension support 55. Three sets of large-sized nylon support roller assemblies are symmetrically arranged on the roller support seats 37, mirror extension support 41 and extension support 55. The lower part of the transverse support seat 42 is connected to the assembly bracket 6 through the support pressing unit guide rail slider assembly 43 to ensure smooth movement.

[0046] The lead screw slide 54 for adjusting the support spacing is a forward and reverse motion lead screw, which can realize the adjustment of the support spacing; the proximity switch baffle 49 and the proximity switch assembly 50 are used to calibrate the zero point of movement and realize the limitation of movement to the position.

[0047] In this embodiment, the clamping cylinder 30, the horizontal lead screw slide 52, the lead screw slide 54 for adjusting the support spacing, and the corresponding drive motor are all commercially available products, and the motors are controlled by an external control system.

[0048] In embodiments of the present invention, the lower support mechanism of the support and clamping unit 2, through the cooperation of the drive motor 38 and the lead screw slide 54 for adjusting the support spacing, can flexibly adjust the spacing of the large-size nylon support rollers to adapt to combustion chamber workpieces of different diameters; the lateral drive mechanism can drive the entire unit to move laterally to adapt to the support requirements of workpieces of different lengths. The clamping sliding compression spring 33 of the upper clamping mechanism provides buffering force, and the flexible contact design of nylon roller I 36 and nylon roller II 39 ensures the stability of axial clamping of the workpiece, avoids workpiece deformation caused by overpressure, and does not damage the workpiece surface. Through bidirectional position adjustment in the lateral and longitudinal directions, the placement deviation of the workpiece 3 can be corrected in real time to achieve dynamic centering, ensuring that the rotation center of the workpiece is precisely aligned with the motion trajectory of the coating execution unit, thereby improving coating uniformity. Equipped with a proximity switch baffle and proximity switch assembly, the zero point of movement can be calibrated and the position limit can be achieved to prevent excessive movement of the support or clamping mechanism, thereby improving operational safety and positioning repeatability.

[0049] See Figure 4As shown in the embodiment of the present invention, the coating execution unit 4 includes a three-degree-of-freedom motion platform, a dispensing rod, a flexible contact mechanism, a limiting plate 68, a dispensing rod rotation drive motor 71, a rod support guide rail seat 75, a flexible contact guide rail slider assembly 76, an axial limiting plate 82, an extension rod clamping seat 83, an extension rod clamping cover 84, and a transition plate 85. The three-degree-of-freedom motion platform is mounted on the assembly bracket 6. The dispensing rod rotation drive motor 71 is mounted on the three-degree-of-freedom motion platform, and its output end is connected to the rod support guide rail seat 75. The rod support guide rail seat 75 is connected to the three-degree-of-freedom motion platform via the flexible contact guide rail slider assembly 76. The extension rod clamping seat 83 is connected to the rod support guide rail seat 75 via the transition plate 85. The extension rod clamping cover 84 is connected to the extension rod clamping seat 83. The two components work together to clamp the glue applicator rod; the axial limiting plate 82 is installed on the transition plate 85 to constrain the axial movement of the glue applicator rod and ensure the stability of the rotation center; the flexible contact mechanism is set at the front end of the rod support guide rail seat 75, and the glue applicator rod rotation drive motor 71 is used to form a spiral coating trajectory by the axial feeding and rotational movement of the glue applicator rod's applicator head.

[0050] In an embodiment of the present invention, the flexible contact mechanism includes a guide shaft fixing plate 61, a glue-applying rod flexible contact spring 62, a glue-applying rod flexible contact spring guide shaft 63, a glue-applying rod flexible contact guide plate 64, and a glue-applying rod flexible contact guide support seat 67. The guide shaft fixing plate 61 is fixed on a three-degree-of-freedom motion platform, the glue-applying rod flexible contact guide support seat 67 is fixed on a rod support guide rail seat 75, the glue-applying rod flexible contact spring guide shaft 63 is slidably connected to the glue-applying rod flexible contact guide support seat 67, and its end is axially limited by the glue-applying rod flexible contact guide plate 64; the glue-applying rod flexible contact spring 62 is sleeved on the glue-applying rod flexible contact spring guide shaft 63 and one end abuts against the glue-applying rod flexible contact guide support seat 67, and the glue-applying rod flexible contact spring guide shaft 63 flexibly contacts the guide shaft fixing plate 61 under the elastic force of the glue-applying rod flexible contact spring 62.

[0051] In embodiments of the present invention, the three-degree-of-freedom motion platform includes a glue-applying rod lifting drive motor 65, a glue-applying rod lifting drive electric cylinder 66, a vertical guide rail seat 69, a glue-applying rod lifting slide plate 70, a glue-applying rod lifting guide rail slider assembly 72, a lifting proximity switch assembly 73, a lifting proximity switch stop plate 74, a vertical support seat 77, a glue-applying rod feed drive motor 78, a glue-applying rod feed drive electric cylinder 79, a glue-applying rod feed linear module 80, a glue-applying rod feed linear module support seat 81, a glue-applying rod lateral movement drive handwheel 86, a glue-applying rod lateral movement linear module 87, a limit rod 88, and a limit support 89. The assembly includes a glue-applying rod transverse guide rail seat 90, a glue-applying rod transverse guide rail slider assembly 91, and a slider pad 92. The glue-applying rod transverse linear module 87 and two glue-applying rod transverse guide rail seats 90 are all mounted on the assembly bracket 6. The glue-applying rod transverse drive handwheel 86 is connected to the end of the glue-applying rod transverse linear module 87. The glue-applying rod transverse guide rail slider assembly 91 is longitudinally mounted on the glue-applying rod transverse guide rail seat 90. A limiting support 89 is provided at the end of the glue-applying rod transverse guide rail slider assembly 91, and a limiting rod 88 is provided on the limiting support 89. The limiting rod 88 and the limiting support 89 form a support seat 81 for the glue-applying rod feed linear module. The system provides positioning; two sliding guide rail slider assemblies 91 for the two dispensing rods are equipped with slider pads 92, and the dispensing rod feed linear module support 81 is placed horizontally on the two slider pads 92. The dispensing rod feed linear module 80 is set on the dispensing rod feed linear module support 81, and the end of the dispensing rod feed linear module 80 is connected in sequence to the dispensing rod feed drive electric cylinder 79 and the dispensing rod feed drive motor 78; the vertical support 77 is connected to the output end of the dispensing rod feed linear module 80, and the vertical guide rail seat 69 is set on the vertical support 77. The dispensing rod lifting guide rail slider assembly 72 is positioned vertically. The glue-applying rod lifting slide plate 70 is vertically mounted on the vertical guide rail seat 69 and connected to the glue-applying rod lifting guide rail slider assembly 72. The glue-applying rod lifting drive electric cylinder 66 is mounted on the vertical support seat 77, and its input end is connected to the glue-applying rod lifting drive motor 65. The output end of the glue-applying rod lifting drive electric cylinder 66 is connected to the glue-applying rod lifting slide plate 70. The lifting proximity switch assembly 73 is mounted on the vertical guide rail seat 69, and the lifting proximity switch baffle 74 is mounted on the glue-applying rod lifting slide plate 70. The lifting proximity switch baffle 74 cooperates with the lifting proximity switch assembly 73 to detect the lifting position of the glue-applying rod.

[0052] Specifically, the glue applicator includes a housing extension rod 58, an extension rod adapter 59, and a fixed-length rod 60 connected in sequence. The end of the housing extension rod 58 is connected to the glue applicator head 93 through the extension rod adapter 94. The flexible contact mechanism ensures constant contact pressure between the dispensing head 93 and the inner wall of the workpiece; the dispensing rod rotation drive motor 71 is fixedly connected to the rod support guide rail seat 75 through the opening on the dispensing rod lifting slide plate 70; the two sets of extension rod clamping seats 83 are fixedly connected to the flexible contact guide rail slider assembly 76 through the transition plate 85 and connected to the rod support guide rail seat 75; the vertical support seat 77 is fixedly connected to the dispensing rod feed drive electric cylinder 79; the dispensing rod feed drive motor 78 drives the dispensing rod feed drive electric cylinder 79 to move linearly; the lifting proximity switch baffle 74 is installed on the dispensing rod lifting slide plate 70 to constrain the movement of the flexible contact mechanism; the dispensing rod transverse drive handwheel 86 is used to drive the dispensing rod transverse linear module 87 to drive the coating execution unit 4 to move transversely; the dispensing rod transverse drive handwheel 86 is equipped with a shaft locking device to fix the transverse position.

[0053] In this embodiment, the adhesive rod lifting drive motor 65 of the coating execution unit 4 drives the adhesive rod lifting slide plate 70 to move along the vertical guide rail seat 69 via the adhesive rod lifting drive electric cylinder 66; the adhesive rod rotation drive motor 71 drives the adhesive rod to rotate to a suitable tilt angle; the flexible contact mechanism achieves pressure self-adaptation through the adhesive rod flexible contact spring 62 and the adhesive rod flexible contact spring guide shaft 63; the adhesive rod feed drive electric cylinder 79 and the adhesive rod transverse linear module 87 achieve multi-axis linkage control.

[0054] In this embodiment, the electric cylinder 66 for lifting the glue applicator rod, the lifting proximity switch assembly 73, the electric cylinder 79 for feeding the glue applicator rod, and the corresponding drive motor are all commercially available products, and the motors are controlled by an external control system.

[0055] In the embodiments of this invention, a three-degree-of-freedom motion platform integrates lifting, feeding, and lateral movement adjustments, and is paired with a rotary drive motor for the coating rod to achieve a composite motion of "rotation + axial feeding" of the coating head, forming a precise spiral coating trajectory and solving the problems of uneven coating thickness and trajectory deviation in traditional coating methods. The flexible contact mechanism, through the cooperation of the flexible contact spring 62 and the guide shaft 63 of the flexible contact spring on the coating rod, enables the coating head 93 to adaptively conform to the curvature of the workpiece's inner wall, automatically compensating for minor errors in the inner wall and ensuring the adhesion between the coating and the inner wall, avoiding missed coatings or excessively thick local coatings. The lifting and feeding actions are driven by an electric cylinder, and with the position detection of the lifting proximity switch assembly, the height and feed speed of the coating head 93 can be precisely controlled. The lateral movement drive handwheel 86 of the coating rod facilitates manual fine-tuning of the lateral position, adapting to the coating requirements of workpieces 3 of different specifications, with convenient adjustment and controllable precision. The extension rod clamping seat 83 and the extension rod clamping cover 84 clamp the glue applicator rod, and the axial limiting plate 82 restricts the axial movement of the glue applicator rod to ensure the stability of the rotation center of the glue applicator head and avoid trajectory deviation caused by the shaking of the glue applicator rod during the coating process.

[0056] See Figure 5 As shown, in an embodiment of the present invention, the glue supply unit 5 includes a glue supply pipe 95, a glue tank 96, a glue tank clamp cover 97, a ceramic electric heating coil 98, a floating joint 101, a guide optical shaft 102, a piston telescopic electric cylinder 103, an electric cylinder drive motor 104, an electric cylinder support base 105, a glue supply proximity switch baffle 106, a glue supply proximity switch assembly 107, a long-end push rod 108, a short-end push rod 109, a glue tank clamp seat 110, and a glue tank end limiter 111. The electric cylinder support base 105 and the glue tank clamp seat 110 are mounted on the assembly bracket 6. The glue tank 96 is fixed to the glue tank clamp seat 110 by the glue tank clamp cover 97 and is axially limited by the glue tank end limiter 111. One end of the glue tank 96 is provided with a piston assembly, and the other end is connected to... The glue supply tube 95 supplies glue to the coating execution unit 4. A ceramic electric heating ring 98 is provided on the outside of the glue tank 96. The piston telescopic electric cylinder 103 is mounted on the electric cylinder support 105 and connected to the electric cylinder drive motor 104. The output end of the piston telescopic electric cylinder 103 is connected to the piston assembly through the floating joint 101. The piston assembly includes a piston 99, a short end push rod 109, a connecting screw sleeve 100, and a long end push rod 108 connected in sequence. The output end of the piston telescopic electric cylinder 103 guides the telescopic movement through two sets of guide optical shafts 102 passing through the holes in the electric cylinder support 105. The glue supply proximity switch assembly 107 is mounted on the assembly bracket 6, and the glue supply proximity switch baffle 106 is mounted on the output end of the piston telescopic electric cylinder 103.

[0057] In this embodiment, the glue tank 96 of the glue supply unit 5 is equipped with a ceramic electric heating coil 98 and a piston 99, which is driven by a piston telescopic electric cylinder 103. The glue supply pipe 95 is connected to the glue application head 93, and the end of the glue tank is sealed and fixed by a glue tank clamp seat 110 and a clamp cover 97. The ceramic electric heating coil 98 is a commercially available product, and its temperature is controlled by an external control system. The piston telescopic electric cylinder 103 is a commercially available product, and its movement is controlled by an external control system.

[0058] In this embodiment, the electric cylinder drive motor 104 of the glue supply unit 5 drives the piston telescopic electric cylinder 103 to push the piston assembly through the floating joint 101. The piston assembly consists of a piston 99, a short-end push rod 109, a connecting sleeve 100, and a long-end push rod 108. Two sets of guide shafts 102 pass through the holes of the electric cylinder support seat 105 to guide the telescopic movement. The glue supply proximity switch baffle 106 cooperates with the glue supply proximity switch assembly 107 to control the piston stroke. The connecting sleeve 100 is threadedly engaged with the long-end push rod 108 and the short-end push rod 109. When it is necessary to replace the glue tank 96, the connecting sleeve 100 is fully screwed onto the long-end push rod 108 to separate the glue tank 96 from the piston assembly, making it easy to remove the glue tank 96.

[0059] In this embodiment, the glue supply proximity switch assembly 107, the piston telescopic electric cylinder 103, and the corresponding drive motor are all commercially available products, and the motor is controlled by an external control system.

[0060] In this embodiment of the invention, the glue tank 96 of the glue supply unit 5 is equipped with a ceramic electric heating coil 98 on its outer side, which can accurately maintain the glue temperature within a set range, prevent glue curing or viscosity fluctuations, ensure the fluidity and viscosity of the glue during the coating process, and reduce coating defects such as bubbles and sagging. The piston 99 is driven by the piston telescopic electric cylinder 103 to push the glue, and the floating joint 101 compensates for installation errors, which can accurately control the pushing pressure and speed. The glue supply proximity switch assembly monitors the piston stroke to achieve accurate control of the glue supply amount per batch, avoiding excessive or insufficient glue output and ensuring uniform coating thickness. The glue tank 96 is fixed to the glue tank clamp cover 97 and the glue tank clamp seat 110. The piston assembly adopts a connecting screw thread connection, which allows for quick separation of the piston 99 and the glue tank 96 when replacing the glue tank 96, simplifying operation and reducing maintenance costs and downtime. The guide optical axis 102 provides precise guidance for the extension and retraction of the piston 99, avoiding fluctuations in glue supply caused by piston 99 offset; the end limit of the glue tank ensures that the glue tank 96 is firmly fixed and the glue supply tube 95 is stably connected, ensuring continuous and stable delivery of glue during the coating process.

[0061] In this embodiment, the assembly bracket 6 integrates all units, and the support clamping unit guide rail slider assembly 43 enables modular and rapid changeover of engines of different lengths and diameters.

[0062] The solid combustion chamber coating device for an engine provided by this invention can be divided into the following four stages in its working principle:

[0063] 1. Workpiece clamping and positioning stage:

[0064] (1) Workpiece placement: The operator places the workpiece 3 (solid combustion chamber of the engine) between the V-shaped clamps 28 of the rotary clamping unit 1. The two ends of the workpiece 3 are initially positioned by the end supports 8.

[0065] (2) Pneumatic clamping: The gripper telescopic cylinder 20 drives the parallel gripper mounting plate 13 to move, causing the gripper to radially clamp the workpiece. The limiting pad 27 on the V-shaped clamping block 28 and the limiting soft block 25 on the limiting hard block 26 form a composite limiting structure to ensure that the clamping force is evenly distributed.

[0066] (3) Rotation preparation: The pneumatic slip ring 18 completes the pneumatic / electrical connection verification, and the rotary drive motor 15 enters the standby state through the rotary drive motor reducer 14.

[0067] 2. Support, compression, and centering stage:

[0068] (1) Axial clamping: The clamping cylinder 30 pushes the small-sized nylon support roller assembly to move down. Nylon roller I 36 and nylon roller II 39 flexibly contact the surface of the workpiece 3 under the action of the clamping sliding compression spring 33. The linear bearing mounting plate 31 ensures the linear motion accuracy of the upper clamping mechanism.

[0069] (2) Dynamic self-alignment: Adjust the support spacing drive motor 38 to adjust the roller spacing by adjusting the support spacing lead screw slide 54, and the horizontal drive motor 44 drives the entire support pressing unit to move along the support pressing unit guide rail slider assembly 43.

[0070] 3. Coating execution stage:

[0071] (1) Positioning of the glue applicator head: The glue applicator lifting drive motor 65 drives the glue applicator lifting slide plate 70 through the glue applicator lifting drive electric cylinder 66; the glue applicator rotation drive motor 71 drives the rod support guide rail seat 75 to rotate to a suitable angle.

[0072] (2) Flexible contact establishment: The flexible contact spring 62 of the glue applicator is compressed, and the pressure is transmitted through the flexible contact spring guide shaft 63 of the glue applicator. The flexible contact guide plate 64 of the glue applicator and the limiting plate 68 form a pressure buffer mechanism, and the glue applicator head 93 is in contact with the inner wall of the workpiece.

[0073] (3) Composite motion coating: The rotary clamping unit rotates the workpiece at a fixed speed, and the glue-applying rod feed drive motor 78 pushes the glue-applying head 93 to move axially through the glue-applying rod feed linear module 80. The two axes work together to form a spiral coating trajectory.

[0074] 4. Adhesive supply control stage:

[0075] (1) Constant temperature glue supply: Ceramic electric heating coil 98 maintains the temperature of glue tank 96 at the set value;

[0076] (2) Pressure control: The electric cylinder drive motor 104 pushes the piston 99 through the piston telescopic electric cylinder 103, the floating joint 101 compensates for installation errors, and the glue supply proximity switch assembly 107 monitors the piston stroke and controls the amount of glue supplied at one time.

[0077] (3) Adhesive delivery: The adhesive is delivered to the applicator head 93 via the adhesive supply pipe 95.

[0078] The present invention provides a coating device for the inner wall of a solid rocket motor combustion chamber, which has high-precision positioning, flexible contact and multi-degree-of-freedom adjustment functions. Through multi-axis linkage and flexible control, it significantly improves coating efficiency and coating quality, and is suitable for solid rocket motor combustion chambers of different sizes.

[0079] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A solid combustion chamber coating device for a solid fuel engine, characterized in that, The assembly includes a rotary clamping unit (1), a support and clamping unit (2), a coating execution unit (4), a glue supply unit (5), and an assembly bracket (6). The rotary clamping unit (1) and the support and clamping unit (2) are located at one end of the assembly bracket (6). The rotary clamping unit (1) is used to clamp and drive the workpiece (3) to rotate. The support and clamping unit (2) is located in front of the rotary clamping unit (1) and is used to support and clamp the workpiece (3). The coating execution unit (4) and the glue supply unit (5) are located at the other end of the assembly bracket (6). The coating execution unit (4) is used to coat the workpiece (3), and the glue supply unit (5) provides glue to the coating execution unit (4). The coating execution unit (4) includes a three-degree-of-freedom motion platform, a dispensing rod, a flexible contact mechanism, a limiting plate (68), a dispensing rod rotary drive motor (71), a rod support guide rail seat (75), a flexible contact guide rail slider assembly (76), an axial limiting plate (82), an extension rod clamping seat (83), an extension rod clamping cover (84), and a transition plate (85). The three-degree-of-freedom motion platform is mounted on the assembly bracket (6), and the dispensing rod rotary drive motor (71) is mounted on the three-degree-of-freedom motion platform, with its output end connected to the rod support guide rail seat (75). The flexible contact guide rail slider assembly (76) is connected to the three-degree-of-freedom motion platform. The extension rod clamping seat (83) is connected to the rod support guide rail seat (75) through the transition plate (85). The extension rod clamping cover (84) cooperates with the extension rod clamping seat (83) to clamp the glue applicator rod. The axial limiting plate (82) is installed on the transition plate (85) to constrain the axial movement of the glue applicator rod and ensure the stability of the rotation center. The flexible contact mechanism is set at the front end of the rod support guide rail seat (75). The glue applicator rod rotation drive motor (71) is used to form a spiral coating trajectory by axial feeding and rotation of the glue applicator rod's glue applicator head. The flexible contact mechanism includes a guide shaft fixing plate (61), a glue-applying rod flexible contact spring (62), a glue-applying rod flexible contact spring guide shaft (63), a glue-applying rod flexible contact guide plate (64), and a glue-applying rod flexible contact guide support seat (67). The guide shaft fixing plate (61) is fixed on the three-degree-of-freedom motion platform, and the glue-applying rod flexible contact guide support seat (67) is fixed on the rod support guide rail seat (75). The glue-applying rod flexible contact spring guide shaft (63) is slidably connected to the glue-applying rod flexible contact guide support seat (67), and its end is axially limited by the glue-applying rod flexible contact guide plate (64). The glue-applying rod flexible contact spring (62) is sleeved on the glue-applying rod flexible contact spring guide shaft (63), and one end abuts against the glue-applying rod flexible contact guide support seat (67). The glue-applying rod flexible contact spring guide shaft (63) flexibly contacts the guide shaft fixing plate (61) under the elastic force of the glue-applying rod flexible contact spring (62).

2. The solid combustion chamber coating apparatus for a solid rocket motor according to claim 1, characterized in that, The rotary clamping unit (1) includes a rotary drive motor reducer (14), a rotary drive motor (15), a rotary support base (16), a slip ring stator support (17), a pneumatic slip ring (18), a rotary shaft (19), and a gripper mechanism. The rotary support base (16) is mounted on the assembly bracket (6), the rotary drive motor reducer (14) is mounted on the rotary support base (16), and its input end is connected to the rotary drive motor (15). The output end of the rotary drive motor reducer (14) is connected to the gripper mechanism through the rotary shaft (19). The pneumatic slip ring (18) is integrated on the rotary shaft (19), and the stator of the pneumatic slip ring (18) is connected to the rotary support base (16) through the slip ring stator support (17).

3. The solid combustion chamber coating apparatus for a solid rocket motor according to claim 2, characterized in that, The gripper mechanism includes a gripper support A (7), an end support (8), a pneumatic gripper adapter plate (9), a stop block A (10), a stop block B (11), an axial positioning support (12), a parallel pneumatic gripper mounting plate (13), a gripper telescopic cylinder (20), a gripper support B (21), a gripper sliding shaft (22), a gripper sliding guide support (23), a gripper sliding compression spring (24), a limiting soft block (25), a limiting hard block (26), a limiting pad (27), and a V-shaped gripper (28). The parallel pneumatic gripper mounting plate (13) is connected to the rotating shaft (19), and the gripper telescopic cylinder (20) is mounted on the parallel pneumatic gripper mounting plate (13). The gripper support A (7) and the gripper support B (9) are connected to the end support B (11). 21) The V-shaped clamping block (28) is connected to the output ends of the clamping extension cylinder (20) on both sides through the pneumatic gripper adapter plate (9). The clamping block (28) is set on the clamping block support A (7), and the limiting pad (27) is set on the working surface of the V-shaped clamping block (28). The limiting hard block (26) is slidably connected to the clamping block support B (21) through two clamping block sliding shafts (22). The end of the clamping block sliding shaft (22) is axially limited by the clamping block sliding guide support (23). Each clamping block sliding shaft (22) is fitted with a clamping block sliding compression spring (24). The clamping block sliding compression spring (24) is limited between the limiting hard block (26) and the clamping block support B (21). The limiting soft block (25) is set on the outer surface of the limiting hard block (26). The parallel gripper mounting plate (13) is connected to two stops A (10) through two axial positioning supports (12). The two stops A (10) are connected to each other through a stop B (11). The end support (8) is set on the stop B (11) and the end support (8) is located between the clamping block support A (7) and the clamping block support B (21).

4. The solid rocket motor combustion chamber coating apparatus according to claim 1, characterized in that, The support and clamping unit (2) includes a transverse drive mechanism, a clamping beam (29), a transverse support seat (42), an upper clamping mechanism, and a lower support mechanism. The transverse drive mechanism is mounted on the assembly bracket (6). The transverse support seat (42) and the clamping beam (29) are both mounted on the transverse drive mechanism. The transverse drive mechanism is used to drive the transverse support seat (42) and the clamping beam (29) to move in a transverse straight line. The lower support mechanism is mounted on the top of the transverse support seat (42) and is used to support the workpiece. The upper clamping mechanism is mounted on the clamping beam (29) and is used to clamp the workpiece onto the lower support mechanism.

5. The solid rocket motor combustion chamber coating apparatus according to claim 4, characterized in that, The upper clamping mechanism includes a clamping cylinder (30), a linear bearing mounting plate (31), a clamping sliding guide support (32), a clamping sliding compression spring (33), a sliding shaft (34), a small-sized nylon support roller assembly, a pressure roller assembly mounting plate (56), and a clamping stop (57). The clamping cylinder (30) is mounted on the clamping beam (29), and its output end is connected to the linear bearing mounting plate (31). The pressure roller assembly mounting plate (56) is located below the linear bearing mounting plate (31), and multiple [unclear text - possibly related to a device or mechanism] are provided above the pressure roller assembly mounting plate (56). A sliding shaft (34) is connected to a linear bearing mounting plate (31) via a linear bearing. The upper end of the sliding shaft (34) is axially limited by a pressing sliding guide support (32). Each sliding shaft (34) is fitted with a pressing sliding compression spring (33). The pressing sliding compression spring (33) is limited between the linear bearing mounting plate (31) and the pressure roller assembly mounting plate (56). A pressing stop (57) is provided below the linear bearing mounting plate (31). A small-sized nylon support roller assembly is installed at the bottom of the pressure roller assembly mounting plate (56). The lower support mechanism includes a roller support base (37), a drive motor (38) for adjusting the support spacing, a large-size nylon support roller assembly, a mirror extension support (41), a guide rail slider assembly for adjusting the support spacing (53), a lead screw slide table for adjusting the support spacing (54), and an extension support (55). The guide rail slider assembly (53) and the lead screw slide table (54) for adjusting the support spacing are longitudinally arranged on the transverse support base (42). The drive motor (38) for adjusting the support spacing is arranged on the transverse support base (42), and its output end is connected to the lead screw slide table for adjusting the support spacing. (54) The two output ends of the adjustable support spacing screw slide (54) are connected to the extension support (55) and the mirror extension support (41) respectively. The extension support (55) and the mirror extension support (41) are both connected to the adjustable support spacing guide slide assembly (53). The adjustable support spacing screw slide (54) drives the extension support (55) and the mirror extension support (41) to move closer or further away from each other. The adjustable support spacing guide slide assembly (53) provides guidance. Large-size nylon support roller assemblies are symmetrically provided on the extension support (55) and the mirror extension support (41).

6. The solid rocket motor combustion chamber coating apparatus according to claim 4, characterized in that, The lateral drive mechanism includes a horizontal lead screw slide (52), a support and clamping unit guide rail slider assembly (43), a horizontal drive motor (44), a horizontal drive motor reducer (45), a horizontal drive motor reducer seat (46), a lead screw bearing seat support (47), a lead screw nut seat (48), a proximity switch baffle (49), and a proximity switch assembly (50). The horizontal lead screw slide (52) and the support and clamping unit guide rail slider assembly (43) are arranged laterally on the assembly bracket (6). The horizontal drive motor reducer seat (46) is located at the end of the horizontal lead screw slide (52), and the horizontal drive motor reducer (45) is located at the end of the horizontal drive unit guide rail slider assembly (50). The input end of the motor reducer (45) is connected to the horizontal drive motor (44), and the output end of the horizontal drive motor reducer (45) is connected to the horizontal lead screw slide (52). The horizontal lead screw slide (52) is supported by the lead screw bearing seat (47). The horizontal lead screw slide (52) is connected to the transverse support seat (42) through the lead screw nut seat (48). The two sides of the transverse support seat (42) are respectively connected to the two support pressing unit guide rail slider assemblies (43). The support pressing unit guide rail slider assembly (43) is provided with a proximity switch baffle (49). The transverse support seat (42) is provided with a proximity switch assembly (50).

7. The solid rocket motor combustion chamber coating apparatus according to claim 1, characterized in that, The three-degree-of-freedom motion platform includes a glue-applying rod lifting drive motor (65), a glue-applying rod lifting drive electric cylinder (66), a vertical guide rail base (69), a glue-applying rod lifting slide plate (70), a glue-applying rod lifting guide rail slider assembly (72), a lifting proximity switch assembly (73), a lifting proximity switch stop plate (74), a vertical support base (77), a glue-applying rod feed drive motor (78), a glue-applying rod feed drive electric cylinder (79), a glue-applying rod feed linear module (80), a glue-applying rod feed linear module support base (81), a glue-applying rod transverse drive handwheel (86), a glue-applying rod transverse linear module (87), a limit rod (88), and a limit support. The assembly includes a support (89), a glue-applying rod transverse guide rail seat (90), a glue-applying rod transverse guide rail slider assembly (91), and a slider pad (92). The glue-applying rod transverse linear module (87) and the two glue-applying rod transverse guide rail seats (90) are all mounted on the assembly support (6). The glue-applying rod transverse drive handwheel (86) is connected to the end of the glue-applying rod transverse linear module (87). The glue-applying rod transverse guide rail seat (90) is longitudinally mounted on the glue-applying rod transverse guide rail slider assembly (91). The end of the glue-applying rod transverse guide rail slider assembly (91) is provided with a limiting support (89), and the limiting support (89) is provided with a limiting rod (88). The two glue-applying rod transverse guide rail sliders are mounted on the assembly support (89). A slider pad (92) is provided on the component (91). The glue-applying rod feed linear module support base (81) is placed horizontally on the two slider pads (92). The glue-applying rod feed linear module (80) is set on the glue-applying rod feed linear module support base (81), and the end of the glue-applying rod feed linear module (80) is connected in sequence to the glue-applying rod feed drive electric cylinder (79) and the glue-applying rod feed drive motor (78). The vertical support base (77) is connected to the output end of the glue-applying rod feed linear module (80). The vertical guide rail base (69) is set on the vertical support base (77). The glue-applying rod lifting guide rail slider assembly (72) is set vertically in the vertical direction. On the guide rail base (69), the glue-applying rod lifting slide plate (70) is connected to the glue-applying rod lifting guide rail slider assembly (72). The glue-applying rod lifting drive electric cylinder (66) is set on the vertical support base (77), and its input end is connected to the glue-applying rod lifting drive motor (65). The output end of the glue-applying rod lifting drive electric cylinder (66) is connected to the glue-applying rod lifting slide plate (70). The lifting proximity switch assembly (73) is set on the vertical guide rail base (69), and the lifting proximity switch baffle (74) is set on the glue-applying rod lifting slide plate (70). The lifting proximity switch baffle (74) cooperates with the lifting proximity switch assembly (73) to detect the lifting position of the glue-applying rod.

8. The solid combustion chamber coating apparatus for a solid rocket motor according to claim 1, characterized in that, The glue supply unit (5) includes a glue supply pipe (95), a glue bucket (96), a glue bucket clamp cover (97), a ceramic electric heating coil (98), a piston assembly, a floating joint (101), a guide optical shaft (102), a piston telescopic electric cylinder (103), an electric cylinder drive motor (104), an electric cylinder support base (105), a glue supply proximity switch baffle (106), a glue supply proximity switch assembly (107), a glue bucket clamp base (110), and a glue bucket end limiter (111). The electric cylinder support base (105) and the glue bucket clamp base (110) are mounted on the assembly bracket (6). The glue bucket (96) is fixed to the glue bucket clamp base (110) by the glue bucket clamp cover (97) and is axially limited by the glue bucket end limiter (111). One end of the glue tank (96) is provided with a plug assembly, and the other end is provided with glue to the coating execution unit (4) through a glue supply pipe (95). A ceramic electric heating ring (98) is provided on the outside of the glue tank (96). The piston telescopic electric cylinder (103) is set on the electric cylinder support base (105) and connected to the electric cylinder drive motor (104). The output end of the piston telescopic electric cylinder (103) is connected to the piston assembly through a floating joint (101). The output end of the piston telescopic electric cylinder (103) passes through the holes of the electric cylinder support base (105) through two sets of guide optical shafts (102) to guide the telescopic movement. The glue supply proximity switch assembly (107) is set on the assembly bracket (6), and the glue supply proximity switch baffle (106) is set on the output end of the piston telescopic electric cylinder (103).

Images