Aerospace aluminum alloy component cold spray pretreatment dust removal device

Abstract

The application discloses an aviation aluminum alloy component cold spraying pretreatment dust removal device, which comprises a workbench, a fixing mechanism and a cleaning mechanism, the fixing mechanism is connected to the workbench and is used for fixing the component, the cleaning mechanism comprises an oil removal assembly, an air drying assembly and a neutralization assembly which are connected to the workbench, the oil removal assembly is used for outputting clean additives to dissolve the oil film on the surface of the component, the air drying assembly is used for outputting air flow to blow off the water vapor on the surface of the component, and the neutralization assembly is used for outputting neutralization ions to neutralize the static electricity on the surface of the component, and the aviation aluminum alloy component cold spraying pretreatment dust removal device has the beneficial effects that the oil removal assembly, the air drying assembly and the neutralization assembly are used to cooperatively complete the step-by-step pretreatment, there is no hard impact in the whole process, and the original size of the soft aviation aluminum alloy thin-wall precision component and the micro-roughness suitable for cold spraying can be protected.

Description

Technical Field

[0001] This invention relates to the field of cold spraying, and more specifically to a dust removal device for cold spraying pretreatment of aerospace aluminum alloy components. Background Technology

[0002] Aerospace aluminum alloy components are characterized by lightweight, high specific strength, and excellent fatigue resistance, and are widely used in critical parts of aircraft fuselages, wings, and airborne load-bearing structures. During long-term service, aerospace aluminum alloy components are subject to alternating loads, air oxidation, sand and dust erosion, and environmental corrosion, which easily lead to the formation of oxide layers, fine wear debris, dust deposits, and microscopic contaminants on their surfaces. Cold spraying surface strengthening and repair processes are typically used to pre-treat and restore the performance of these components.

[0003] Cold spraying is a solid-state high-speed deposition process. The mechanical bonding strength, density, and smoothness of the coating and the substrate are highly dependent on the cleanliness of the substrate surface. If impurities such as oxide dust, grinding debris, and dust particles remain on the surface, corners, gaps, and grooves of the component, they will directly block the effective bonding interface between the powder and the substrate, resulting in fatal defects such as insufficient coating adhesion, high local porosity, peeling, and delamination. This significantly reduces the structural stability and service safety of the repaired aerospace components.

[0004] Chinese utility model patent CN209531246U discloses a cold spraying production system, including a powder treatment area for mechanically activating spraying powder; a sprayed part treatment area for sandblasting sprayed parts, specifically a sandblasting machine; and a spraying chamber for cold spraying the mechanically activated spraying powder onto the sandblasted sprayed parts.

[0005] The above has the following defects: Sandblasting relies on high-speed hard abrasive to impact the workpiece surface to remove oxidation and oil stains. However, aerospace aluminum alloys are soft and the components are mostly thin-walled and have precision irregular structures. The impact of high-speed abrasive will produce deep pits, tearing scratches on the substrate surface, and damage the original precision dimensions and micro-roughness of the components. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a dust removal device for cold spraying pretreatment of aerospace aluminum alloy components, which solves the technical problem of sandblasting damaging the size and roughness of workpieces in the prior art.

[0007] To achieve the above-mentioned technical objectives, the present invention provides a dust removal device for cold spraying pretreatment of aerospace aluminum alloy components, including a workbench; A fixing mechanism, connected to the worktable, is used to fix the component; and, The cleaning mechanism includes an oil removal component, a drying component, and a neutralization component connected to the workbench. The oil removal component is used to output a cleaning agent to dissolve the oil film on the surface of the component. The drying component is used to output an airflow to blow away the moisture on the surface of the component. The neutralization component is used to output neutralizing ions to neutralize the static electricity on the surface of the component.

[0008] In some embodiments, the oil removal assembly includes a storage tank, an atomizer, a first pipe, a first negative pressure pump, and a nozzle. The storage tank stores a cleaning agent, the outlet of the storage tank is connected to the inlet of the first pipe, the atomizer is installed on the first pipe, the outlet of the first pipe is connected to the inlet of the first negative pressure pump, and the outlet of the first negative pressure pump is connected to the inlet of the nozzle.

[0009] In some embodiments, the air-drying assembly includes an air tank, a second pipe, a manifold, and a four-way valve. The air tank stores inert gas. The outlet of the air tank is connected to the inlet of the second pipe. The outlet of the first pipe is connected to the first inlet of the four-way valve. The outlet of the second pipe is connected to the second inlet of the four-way valve. The outlet of the four-way valve is connected to the inlet of the manifold. The outlet of the manifold is connected to the inlet of the first negative pressure pump.

[0010] In some embodiments, the cleaning mechanism further includes a mixing assembly, which includes a mixing pipe, a plurality of turbulence-dispersing blades, and a flow-equalizing net. The outlet of the four-way valve is connected to the inlet of the mixing pipe, and the outlet of the mixing pipe is connected to the inlet of the manifold. The plurality of turbulence-dispersing blades are staggered along the axial direction of the mixing pipe and the flow-equalizing net is connected to the outlet of the mixing pipe.

[0011] In some embodiments, the neutralization component includes an ion generator, an ion-generating needle assembly, and a third conduit. The outlet of the ion generator is connected to the inlet of the third conduit, and the outlet of the third conduit is connected to the third inlet of the four-way valve. The ion-generating needle assembly is installed at the outlet of the third conduit and is electrically connected to the ion generator.

[0012] In some embodiments, the ion generating needle assembly includes a mounting base, a plurality of ionizing needles, and a plurality of ultrasonic vibrating plates. The mounting base is connected to the outlet of the third pipe, the plurality of ionizing needles are alternately connected to the mounting base, and the plurality of ultrasonic vibrating plates are respectively connected to the ends of the plurality of ionizing needles.

[0013] In some embodiments, the fixing mechanism includes a fixed base, a first motor, a double-ended lead screw, a guide rail, and grippers. The fixed base is connected to the worktable, the guide rail is connected to the fixed base, the grippers are slidably connected to the guide rail, the first motor is mounted on the fixed base, the double-ended lead screw is connected to the output shaft of the first motor, and the two ends of the double-ended lead screw pass through the two grippers respectively and are threadedly connected to the two grippers.

[0014] In some embodiments, the fixing mechanism further includes a lifting assembly, which includes an electric push rod and a telescopic guide rod. The electric push rod is mounted on the worktable, and the output shaft of the electric push rod is connected to the fixed base. One end of the telescopic guide rod is connected to the worktable, and the other end of the telescopic guide rod is connected to the fixed base.

[0015] In some embodiments, the fixing mechanism further includes a rotating assembly, which includes a second motor and a turntable. The second motor is mounted on the worktable, the turntable is rotatably connected to the worktable, the output shaft of the second motor is connected to the turntable, and the electric push rod and the telescopic guide rod are both mounted on the turntable.

[0016] In some embodiments, the dust removal device further includes a recycling mechanism, which includes a recycling hood, a recycling pipe, a second negative pressure pump, and a filter. The outlet of the recycling hood is connected to the inlet of the recycling pipe, the outlet of the recycling pipe is connected to the inlet of the second negative pressure pump, and the outlet of the second negative pressure pump is connected to the inlet of the filter.

[0017] Compared with the prior art, the beneficial effects of the present invention include: the step-by-step pretreatment is completed in synergy by the degreasing component, the drying component, and the neutralization component, without any hard impact throughout the process, which can protect the original dimensions of the soft aerospace aluminum alloy thin-walled precision components and adapt to the micro-roughness of cold spraying. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the dust removal device provided by the present invention; Figure 2 This is a schematic diagram of the overall structure of the cleaning mechanism provided by the present invention; Figure 3 This is a cross-sectional view of the overall structure of the ion generating needle assembly provided by the present invention; Figure 4 This is a cross-sectional view of the overall structure of the hybrid component provided by the present invention; Figure 5 This is a first-view overall structural schematic diagram of the fixing mechanism provided by the present invention; Figure 6 This is a second-view overall structural diagram of the fixing mechanism provided by the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Workbench; 2. Fixing mechanism; 21. Fixing base; 22. First motor; 23. Double-ended lead screw; 24. Guide rail; 25. Gripper; 26. Lifting assembly; 261. Electric push rod; 262. Telescopic guide rod; 27. Rotating assembly; 271. Second motor; 272. Turntable; 3. Cleaning mechanism; 31. Oil removal assembly; 311. Liquid storage tank; 312. Atomizer; 313. First pipeline; 314. First negative pressure pump; 315. Nozzle; 32. Drying assembly; 321. 322. Gas storage tank; 323. Second pipe; 324. Manifold; 325. Four-way valve; 33. Neutralization assembly; 331. Ion generator; 332. Ion generating needle assembly; 3321. Mounting base; 3322. Ionization needle; 3323. Ultrasonic vibrator; 333. Third pipe; 34. Mixing assembly; 341. Mixing pipe; 342. Baffle blade; 343. Flow equalization net; 4. Recovery mechanism; 41. Recovery hood; 42. Recovery pipe; 43. Second negative pressure pump; 44. Filter. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] Example 1: This invention provides a dust removal device for cold spraying pretreatment of aerospace aluminum alloy components, the structure of which is as follows: Figure 1 - Figure 6 As shown, it includes a workbench 1, a fixing mechanism 2, and a cleaning mechanism 3.

[0022] The fixing mechanism 2 is connected to the workbench 1 and is used to fix the components.

[0023] The cleaning mechanism 3 includes an oil removal component 31, a drying component 32, and a neutralization component 33 connected to the workbench 1. The oil removal component 31 is used to output cleaning aids to dissolve the oil film on the surface of the component. The drying component 32 is used to output airflow to blow away the water vapor on the surface of the component. The neutralization component 33 is used to output neutralizing ions to neutralize the static electricity on the surface of the component.

[0024] In use, the aircraft aluminum alloy thin-walled precision component is first stably clamped and positioned by the fixing mechanism 2 on the workbench 1. Then, the cleaning mechanism 3 completes the integrated pre-treatment operation. First, the degreasing component 31 outputs a small amount of atomized cleaning agent to evenly cover the surface and gaps of the component, dissolve and remove the residual oil film on the surface of the component, soften and solidify the adhering dust, and break the adhesion of the dust matrix. During the degreasing process, the neutralization component 33 is activated simultaneously to output positive and negative neutralizing ions to neutralize the electrostatic accumulation of fine dust on the surface of the component in real time and eliminate electrostatic adsorption. Finally, the drying component 32 outputs a dry and clean airflow to blow away the residual agent and moisture on the surface of the component and carry away the loose dust, so that the surface of the component remains dry and clean.

[0025] In this invention, a stepped pretreatment is completed in collaboration with the degreasing component 31, the drying component 32, and the neutralization component 33. There is no hard impact throughout the process, which can protect the original size of the soft aerospace aluminum alloy thin-walled precision components and adapt to the micro-roughness of cold spraying.

[0026] To achieve degreasing and cleaning of the components, please refer to... Figure 2 In a preferred embodiment, the oil removal assembly 31 includes a liquid storage tank 311, an atomizer 312, a first pipe 313, a first negative pressure pump 314, and a nozzle 315. The liquid storage tank 311 stores a cleaning agent. The outlet of the liquid storage tank 311 is connected to the inlet of the first pipe 313. The atomizer 312 is installed in the first pipe 313. The outlet of the first pipe 313 is connected to the inlet of the first negative pressure pump 314. The outlet of the first negative pressure pump 314 is connected to the inlet of the nozzle 315.

[0027] During use, the cleaning agent stored in the storage tank 311 enters the first pipe 313 under the suction of the first negative pressure pump 314. When it flows through the atomizer 312 installed on the first pipe 313, it is broken into uniform micro-atomized droplets, which transforms the liquid cleaning agent into a mist medium. The atomized agent medium continues to be transported along the first pipe 313 and is transported to the nozzle 315 under the pressure drive of the first negative pressure pump 314. The nozzle 315 sprays the agent evenly onto the surface and gaps of the aviation aluminum alloy component. The wetting and dissolving effect of the atomized cleaning agent softens and dissolves the residual oil film and solidified dust on the surface of the component, breaks the adhesion between the dust and the substrate, and provides a clean pretreatment basis for subsequent air drying and electrostatic neutralization processes.

[0028] To achieve air-drying cleaning of the components, please refer to... Figure 2In a preferred embodiment, the air drying assembly 32 includes an air storage tank 321, a second pipe 322, a manifold 323, and a four-way valve 324. The air storage tank 321 stores inert gas. The outlet of the air storage tank 321 is connected to the inlet of the second pipe 322. The outlet of the first pipe 313 is connected to the first inlet of the four-way valve 324. The outlet of the second pipe 322 is connected to the second inlet of the four-way valve 324. The outlet of the four-way valve 324 is connected to the inlet of the manifold 323. The outlet of the manifold 323 is connected to the inlet of the first negative pressure pump 314.

[0029] In use, the inert gas stored inside the gas storage tank 321 is transported to the second inlet of the four-way valve 324 via the second pipe 322. The four-way valve 324 can realize the switching of the gas path and the liquid path, so that the inert gas transported by the second pipe 322 and the atomizing agent medium transported by the first pipe 313 are combined inside the four-way valve 324. The mixed gas and liquid medium is uniformly collected and output through the manifold 323, and is transported forward under the suction and pressure drive of the first negative pressure pump 314. After the degreasing process is completed, the atomizing agent path can be cut off by the four-way valve 324 and the inert gas path can be opened separately, so that the high-purity dry inert gas is finally sprayed out at high speed from the nozzle 315 through the manifold 323 and the first negative pressure pump 314. The dry inert airflow is used to quickly blow away the cleaning agent, free water vapor and loose dust that has been softened and peeled off from the surface of the aviation aluminum alloy component, so that the surface of the component is quickly dried and shaped.

[0030] To improve the mixing effect of additives and inert gases, please refer to... Figure 4 In a preferred embodiment, the cleaning mechanism 3 further includes a mixing component 34, which includes a mixing pipe 341, a plurality of turbulence-disrupting blades 342, and a flow-equalizing net 343. The outlet of the four-way valve 324 is connected to the inlet of the mixing pipe 341, and the outlet of the mixing pipe 341 is connected to the inlet of the manifold 323. The plurality of turbulence-disrupting blades 342 are staggered along the axial direction of the mixing pipe 341 and the flow-equalizing net 343 is connected to the outlet of the mixing pipe 341.

[0031] The flow equalization mesh 343 includes an annular mounting frame, multiple layers of porous flow equalization plates, positioning buckles, and sealing gaskets. The annular mounting frame is snapped and fixed to the inner wall of the outlet of the mixing pipe 341. The multiple layers of porous flow equalization plates are arranged in parallel intervals along the medium flow direction, and the mesh holes of adjacent layers of porous flow equalization plates are staggered. The positioning buckles are formed on the outer periphery of the annular mounting frame to enable quick assembly and disassembly of the flow equalization mesh 343. The sealing gasket is located between the outer edge of the annular mounting frame and the inner wall of the mixing pipe 341 to prevent the mixed gas and liquid from leaking from the gaps.

[0032] In use, the atomizing agent and inert gas mixed gas-liquid medium after being merged by the four-way valve 324 first enter the mixing pipe 341. When the medium flows through the multiple turbulence blades 342 arranged axially in the mixing pipe 341, it is continuously sheared, turbulent, and mixed by reversal, effectively breaking the gas-liquid stratification and droplet agglomeration, and greatly extending the mixing path and contact time of the two-phase medium, so that the atomizing cleaning agent and the inert gas flow can be fully integrated. Then, the fully mixed medium flows through the flow equalization net 343 at the outlet of the mixing pipe 341. The flow equalization net 343 performs secondary rectification, flow equalization and fine and large droplet breakup of the turbulent airflow, so that the flow rate and mist concentration distribution of the mixed gas-liquid medium are more uniform and stable. Finally, the uniform and homogeneous gas-liquid mixed medium is sent into the manifold 323 and delivered to the nozzle 315.

[0033] To eliminate surface static electricity on components, please refer to... Figure 2 In a preferred embodiment, the neutralization component 33 includes an ion generator 331, an ion generating needle assembly 332, and a third conduit 333. The outlet of the ion generator 331 is connected to the inlet of the third conduit 333, and the outlet of the third conduit 333 is connected to the third inlet of the four-way valve 324. The ion generating needle assembly 332 is installed at the outlet of the third conduit 333 and is electrically connected to the ion generator 331. The neutralization mechanism uses an LA-DC411 type bipolar high-frequency ion generator 331, equipped with a DQ-H12 annular bipolar corona emission electrode array. The single discharge needle inside the array is a HY-W1.5×16 high-purity tungsten discharge needle. The ion generator 331 outputs a ±2500V high-frequency ionization voltage.

[0034] During use, the ion generator 331 is powered on to generate positive and negative neutral ions. The generated neutral ions are transported into the third pipe 333 by the airflow. The ion generating needle group 332 arranged at the outlet of the third pipe 333 is electrically connected to the ion generator 331 to stabilize ionization and continuously release positive and negative ions. The ion airflow is transported through the third pipe 333 to the third inlet of the four-way valve 324, where it is mixed with the oil removal atomizing medium and the drying inert gas at the four-way valve 324, so that the neutral ions are evenly mixed into the cleaning gas-liquid medium. During the overall pretreatment process of the device, the neutral ions are synchronously transported to the component cleaning area with the mixed gas to continuously neutralize the electrostatic charge carried by the surface of the aviation aluminum alloy components, fine dust and atomized droplets, and eliminate the electrostatic adsorption effect.

[0035] To achieve self-cleaning of the ion-generating needle assembly 332, please refer to... Figure 3In a preferred embodiment, the ion generating needle assembly 332 includes a mounting base 3321, a plurality of ionizing needles 3322, and a plurality of ultrasonic vibrating plates 3323. The mounting base 3321 is connected to the outlet of the third pipe 333. The plurality of ionizing needles 3322 are alternately connected to the mounting base 3321, and the plurality of ultrasonic vibrating plates 3323 are respectively connected to the ends of the plurality of ionizing needles 3322. The ultrasonic vibrating plates 3323 are model 20B4000 PZT5H, with a resonant frequency of 4000kHz, an operating voltage of DC24V, and are made of PZT5H corrosion-resistant piezoelectric ceramic material.

[0036] During use, after a single operation is completed, the ultrasonic vibrating plate 3323 starts high-frequency resonance, causing the additive crystals, oil stains, carbon deposits, and dust deposits attached to the tip and body of the ionization needle 3322 to fatigue and fall off, achieving online contactless self-cleaning of the ionization needle 3322 and avoiding problems such as reduced ionization efficiency and uneven ion output caused by needle tip contamination.

[0037] To secure the component, please refer to... Figure 5 In a preferred embodiment, the fixing mechanism 2 includes a fixing base 21, a first motor 22, a double-ended lead screw 23, a guide rail 24, and grippers 25. The fixing base 21 is connected to the worktable 1, the guide rail 24 is connected to the fixing base 21, the grippers 25 are slidably connected to the guide rail 24, the first motor 22 is mounted on the fixing base 21, the double-ended lead screw 23 is connected to the output shaft of the first motor 22, and the two ends of the double-ended lead screw 23 pass through the two grippers 25 respectively and are threadedly connected to the two grippers 25.

[0038] In use, the aerospace aluminum alloy component is placed in the clamping station. The first motor 22 starts and drives the double-ended lead screw 23 to rotate synchronously. Utilizing the transmission characteristics of the positive and negative threads at both ends of the double-ended lead screw 23, the two sets of grippers 25 are driven to slide synchronously towards or away from each other along the guide rail 24. The guide rail 24 provides precise limit guidance for the movement of the grippers 25, ensuring that the translation process of the grippers 25 is smooth and without deviation, so that the two sets of grippers 25 are synchronously aligned and clamp the component or automatically release the material.

[0039] To achieve the lifting and moving of the components, please refer to... Figure 6In a preferred embodiment, the fixing mechanism 2 further includes a lifting assembly 26, which includes an electric push rod 261 and a telescopic guide rod 262. The electric push rod 261 is mounted on the worktable 1, and its output shaft is connected to the fixed base 21. One end of the telescopic guide rod 262 is connected to the worktable 1, and the other end is connected to the fixed base 21. The telescopic guide rod 262 includes an outer guide sleeve, an inner slide rod, a wear-resistant guide bushing, a limiting ring, and a dustproof sealing ring. The lower end of the outer guide rod is fixed to the worktable 1, and the upper end of the inner slide rod is connected to the bottom of the fixed base 21. The wear-resistant guide bushing is coaxially embedded inside the outer guide sleeve, and the inner slide rod slides through the wear-resistant guide bushing. The limiting ring is fixed to the bottom end of the inner slide rod to limit its maximum extension stroke and prevent it from coming out. The dustproof sealing ring is installed at the upper opening of the outer guide sleeve and wraps around and fits the outer wall of the inner slide rod.

[0040] In use, the electric push rod 261 is fixedly installed on the workbench 1 as the overall lifting power source. The telescopic guide rod 262 is arranged parallel to the electric push rod 261, playing a role in auxiliary guidance and force support. When it is necessary to adjust the working height of the component, the output shaft of the electric push rod 261 extends and retracts, driving the fixed seat 21 to rise and fall vertically as a whole. At the same time, the telescopic guide rod 262 extends and retracts synchronously with the fixed seat 21, limiting the horizontal sway and angular deviation of the fixed seat 21, ensuring that the lifting process is stable and vertical without sway. By precisely controlling the lifting stroke through the electric push rod 261, the relative working height of the aviation aluminum alloy component and the nozzle 315 can be adaptively adjusted to meet the full-area cleaning needs of components with different thicknesses and irregular shapes.

[0041] To achieve component rotation and movement, please refer to... Figure 6 In a preferred embodiment, the fixing mechanism 2 further includes a rotating component 27, which includes a second motor 271 and a turntable 272. The second motor 271 is mounted on the worktable 1, and the turntable 272 is rotatably connected to the worktable 1. The output shaft of the second motor 271 is connected to the turntable 272. The electric push rod 261 and the telescopic guide rod 262 are both mounted on the turntable 272.

[0042] In use, the second motor 271 is fixedly installed on the workbench 1 and serves as the rotation power source. The turntable 272 is rotated and assembled on the top surface of the workbench 1. The electric push rod 261 and the telescopic guide rod 262 are integrated and installed on the upper surface of the turntable 272, so that the lifting component 26, the fixed seat 21 and the clamped and fixed aviation aluminum alloy components can rotate synchronously with the turntable 272. After the components are positioned, clamped and height adjusted, the second motor 271 drives the turntable 272 to rotate at a constant speed, which drives the components clamped above to achieve stepless micro-adjustment of the circumferential angle, so that the front and back surfaces, side corners, deep grooves and inner holes of the components, and other conventional cleaning blind areas are sequentially directed toward the cleaning area of ​​the nozzle 315.

[0043] For the recovery and processing of impurities, please refer to... Figure 1 In a preferred embodiment, the dust removal device further includes a recovery mechanism 4, which includes a recovery hood 41, a recovery pipe 42, a second negative pressure pump 43, and a filter 44. The outlet of the recovery hood 41 is connected to the inlet of the recovery pipe 42, the outlet of the recovery pipe 42 is connected to the inlet of the second negative pressure pump 43, and the outlet of the second negative pressure pump 43 is connected to the inlet of the filter 44. The filter 44 includes a housing, a primary filter cotton, a secondary filter element, a flow guide baffle, a slag discharge port, and a clean gas outlet. An air inlet is opened at one end of the housing and sealed to the outlet of the second negative pressure pump 43. The primary filter cotton and the secondary filter element are sequentially assembled inside the housing along the airflow direction. The flow guide baffle is located between the primary filter cotton and the secondary filter element. A slag discharge port for collecting oil and dust mixture is opened at the bottom of the housing, and a clean gas outlet is provided at the end of the housing away from the air inlet.

[0044] During use, the second negative pressure pump 43 continuously provides negative pressure suction power, causing the dust, detached impurities, and residual atomizing agent droplets that fall off during the pretreatment process to be concentrated and gathered inside the recovery hood 41. The recovery hood 41 collects and gathers the scattered pollutants. Under the action of negative pressure, all kinds of impurity media are uniformly transported to the second negative pressure pump 43 through the recovery pipe 42, and then pressurized and transported to the filter 44. The filter 44 performs graded interception and purification of the mixed impurity airflow, intercepting and filtering solid dust and oil impurities, and only discharging clean gas, effectively collecting the pollutants generated during the pretreatment process.

[0045] Example 2: This embodiment has a basically the same structure as Embodiment 1, except that the degreasing component 31, the air drying component 32, and the neutralization component 33 are different.

[0046] Specific structural improvements: The degreasing assembly 31 includes a storage tank, a circulating pump, a main distribution pipe, an annular spray pipe, multiple sets of fan-shaped spray nozzles, and a level compensation component. The storage tank stores cleaning agents. The bottom of the storage tank is connected to the inlet of the circulating pump, and the outlet of the circulating pump is connected to the main distribution pipe. The main distribution pipe is arranged around the outside of the aluminum alloy component and connected to the annular spray pipe. Multiple sets of fan-shaped spray nozzles are evenly arrayed on the inner side of the annular spray pipe, with each fan-shaped spray nozzle inclined towards the surface of the component. A level compensation component is installed on the top of the storage tank to replenish lost cleaning agents in real time and maintain stable spray pressure.

[0047] During use, the cleaning agent inside the storage tank is pressurized and delivered to the annular spray pipe by a circulating pump. The fan-shaped spray nozzles in a circumferential array spray the entire area of ​​the component. Compared with the single-point direct spray structure, it can achieve no dead angle spraying and wetting of aluminum alloy irregular curved surfaces, grooves and corners, so that the agent can fully dissolve stubborn oil film and oxidized oil stains on the surface of the component. At the same time, the closed-loop circulation liquid supply method has a higher utilization rate of the agent and significantly improved degreasing uniformity.

[0048] The air-drying assembly 32 includes a high-pressure gas tank, a pressure regulating valve, an annular air chamber, a porous air distribution plate, and a guide air duct. The high-pressure gas tank stores dry inert gas. A pressure regulating valve is installed at the outlet of the high-pressure gas tank, and the outlet of the pressure regulating valve is connected to the annular air chamber. A porous air distribution plate is attached to the inner side of the annular air chamber, forming a pressure-stabilizing air duct between the annular air chamber and the porous air distribution plate. Micro-ventilation holes are evenly opened on the inner side of the porous air distribution plate, and the airflow is evenly output towards the surface of the component through the micro-ventilation holes. The guide air duct is inclinedly arranged on the outer side of the porous air distribution plate to guide the airflow to sweep along the tangential direction of the component surface.

[0049] During use, the high-pressure inert gas enters the annular air chamber after being stabilized by the pressure regulating valve. The airflow is uniformly reduced and depressurized through the porous air distribution plate, forming a uniform layered airflow. Combined with the tangential guide air duct, the entire surface of the component is swept and dried, removing residual moisture and residual additive liquid film from the surface of the component, and avoiding local water accumulation and liquid residue.

[0050] The neutralization component 33 includes a high-frequency ion generator, a ring-shaped ion rack, multiple sets of alternating positive and negative ion needles, a diffusion fan, and a dust filter assembly. The high-frequency ion generator is fixed to the side of the workbench 1. The ring-shaped ion rack is arranged around the outside of the component. Multiple sets of alternating positive and negative ion needles are installed in a ring array on the inner side of the ring-shaped ion rack. Each ion needle is electrically connected to the high-frequency ion generator. The diffusion fan is embedded in the center of the top of the ring-shaped ion rack, and the dust filter assembly covers the outside of the diffusion fan.

[0051] During use, the high-frequency ion generator drives the positive and negative ion needles of the ring array to ionize the air, generating a large number of positive and negative neutral ions. The top diffusion fan actively disturbs the surrounding airflow field, allowing the neutral ions to quickly diffuse and evenly cover the entire surface of the component, neutralizing the static electricity generated by friction during the degreasing and drying process, and eliminating the micro-dust particles adsorbed by static electricity.

[0052] To better understand this invention, the following is combined with... Figure 1 - Figure 6 The working principle of a cold spray pretreatment dust removal device for aerospace aluminum alloy components according to the present invention is described in detail as follows: First, the fixed mechanism 2 on the workbench 1 stably clamps and positions the aerospace aluminum alloy thin-walled precision component. Then, the cleaning mechanism 3 works together to complete the integrated pretreatment operation. First, the degreasing component 31 outputs a small amount of atomized cleaning agent to evenly cover the surface and gaps of the component, dissolve and remove the residual oil film on the surface of the component, soften and solidify the adhering dust, and break the adhesion of the dust matrix. During the degreasing process, the neutralization component 33 is activated simultaneously to output positive and negative neutralizing ions to neutralize the electrostatic accumulation of fine dust on the surface of the component in real time and eliminate electrostatic adsorption. Finally, the drying component 32 outputs a dry and clean airflow to blow away the residual agent and water vapor on the surface of the component and carry away the loose dust, so that the surface of the component remains dry and clean.

[0053] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A dust removal device for cold spraying pretreatment of aerospace aluminum alloy components, characterized in that, include: Workbench; A fixing mechanism, connected to the workbench, is used to fix the component; as well as, The cleaning mechanism includes an oil removal component, a drying component, and a neutralization component connected to the workbench. The oil removal component is used to output a cleaning agent to dissolve the oil film on the surface of the component. The drying component is used to output an airflow to blow away the moisture on the surface of the component. The neutralization component is used to output neutralizing ions to neutralize the static electricity on the surface of the component.

2. The dust removal device for cold spraying pretreatment of aerospace aluminum alloy components according to claim 1, characterized in that, The oil removal assembly includes a storage tank, an atomizer, a first pipe, a first negative pressure pump, and a nozzle. The storage tank stores a cleaning agent. The outlet of the storage tank is connected to the inlet of the first pipe. The atomizer is installed on the first pipe. The outlet of the first pipe is connected to the inlet of the first negative pressure pump. The outlet of the first negative pressure pump is connected to the inlet of the nozzle.

3. The dust removal device for cold spraying pretreatment of aerospace aluminum alloy components according to claim 2, characterized in that, The air-drying assembly includes an air storage tank, a second pipe, a manifold, and a four-way valve. The air storage tank stores inert gas. The outlet of the air storage tank is connected to the inlet of the second pipe. The outlet of the first pipe is connected to the first inlet of the four-way valve. The outlet of the second pipe is connected to the second inlet of the four-way valve. The outlet of the four-way valve is connected to the inlet of the manifold. The outlet of the manifold is connected to the inlet of the first negative pressure pump.

4. The dust removal device for cold spraying pretreatment of aerospace aluminum alloy components according to claim 3, characterized in that, The cleaning mechanism further includes a mixing component, which includes a mixing pipe, multiple turbulence-disrupting blades, and a flow-equalizing net. The outlet of the four-way valve is connected to the inlet of the mixing pipe, and the outlet of the mixing pipe is connected to the inlet of the manifold. The multiple turbulence-disrupting blades are staggered along the axial direction of the mixing pipe, and the flow-equalizing net is connected to the outlet of the mixing pipe.

5. The dust removal device for cold spraying pretreatment of aerospace aluminum alloy components according to claim 3, characterized in that, The neutralization assembly includes an ion generator, an ion-generating needle assembly, and a third conduit. The outlet of the ion generator is connected to the inlet of the third conduit, and the outlet of the third conduit is connected to the third inlet of the four-way valve. The ion-generating needle assembly is installed at the outlet of the third conduit and is electrically connected to the ion generator.

6. The dust removal device for cold spraying pretreatment of aerospace aluminum alloy components according to claim 5, characterized in that, The ion generating needle assembly includes a mounting base, multiple ionizing needles, and multiple ultrasonic vibrating plates. The mounting base is connected to the outlet of the third pipe, the multiple ionizing needles are alternately connected to the mounting base, and the multiple ultrasonic vibrating plates are respectively connected to the ends of the multiple ionizing needles.

7. The dust removal device for cold spraying pretreatment of aerospace aluminum alloy components according to claim 1, characterized in that, The fixing mechanism includes a fixed base, a first motor, a double-ended lead screw, a guide rail, and grippers. The fixed base is connected to the worktable, the guide rail is connected to the fixed base, and the grippers are slidably connected to the guide rail. The first motor is mounted on the fixed base, and the double-ended lead screw is connected to the output shaft of the first motor. The two ends of the double-ended lead screw pass through the two grippers respectively and are threadedly connected to the two grippers.

8. The dust removal device for cold spraying pretreatment of aerospace aluminum alloy components according to claim 7, characterized in that, The fixing mechanism further includes a lifting assembly, which includes an electric push rod and a telescopic guide rod. The electric push rod is mounted on the worktable, and its output shaft is connected to the fixed base. One end of the telescopic guide rod is connected to the worktable, and the other end is connected to the fixed base.

9. The dust removal device for cold spraying pretreatment of aerospace aluminum alloy components according to claim 8, characterized in that, The fixing mechanism further includes a rotating assembly, which includes a second motor and a turntable. The second motor is mounted on the worktable, and the turntable is rotatably connected to the worktable. The output shaft of the second motor is connected to the turntable, and the electric push rod and the telescopic guide rod are both mounted on the turntable.

10. The dust removal device for cold spraying pretreatment of aerospace aluminum alloy components according to claim 1, characterized in that, The dust removal device also includes a recycling mechanism, which includes a recycling hood, a recycling pipe, a second negative pressure pump, and a filter. The outlet of the recycling hood is connected to the inlet of the recycling pipe, the outlet of the recycling pipe is connected to the inlet of the second negative pressure pump, and the outlet of the second negative pressure pump is connected to the inlet of the filter.

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