Ultrasonic cleaning device and method with enhanced flow field and mechanical motion

Abstract

The application discloses an ultrasonic cleaning device enhanced by a flow field and mechanical movement, comprising an ultrasonic cleaning unit, a mechanical movement unit arranged on one side of the ultrasonic cleaning unit, and a flow field regulation unit oppositely arranged on the mechanical movement unit; the ultrasonic cleaning unit, the mechanical movement unit and the flow field regulation unit are electrically connected with a central controller; and the central controller is electrically connected with a circulating filtration unit. The application also discloses a cleaning method of the ultrasonic cleaning device enhanced by the flow field and the mechanical movement. In the application, the synchronous coupling cleaning mode of the ultrasonic field, the flow field and the mechanical movement can effectively strip the deposits hidden in the dead angle area, so that the deposits are fully suspended in the liquid phase medium, and the deposits are completely removed by the transport effect of the flow field.

Description

Technical Field

[0001] This invention belongs to the technical field of precision parts cleaning equipment, specifically relating to an ultrasonic cleaning device that enhances ultrasonic cleaning through flow field and mechanical motion, and also to a cleaning method of the device. Background Technology

[0002] In high-end manufacturing fields such as aerospace, electronics and information technology, precision machinery, and medical devices, many key components have complex internal cavity structures ranging from micrometers to millimeters. Examples include cooling channels inside aero-engine turbine blades, cavities in microelectronic packaging devices, slender cavities in high-precision molds, channel networks in microfluidic chips, and intersecting channels inside hydraulic valve bodies. These structures typically feature high aspect ratios, numerous bends, blind holes, narrow gaps, and localized dead zones. Their surfaces and internal cavities are highly susceptible to the accumulation of metal shavings, grinding powder, polishing paste, mold release agents, oxide particles, welding slag, organic contaminants, and other residues. Incomplete cleaning can not only reduce the precision and sealing performance of components but may also lead to blockages, wear, corrosion, and even functional failures during service, seriously threatening the safety and reliability of the entire system.

[0003] Current cleaning technologies mainly include ultrasonic cleaning, focused acoustic cleaning, bubbling cleaning, high-pressure water rinsing, air blowing, and solvent rinsing. Ultrasonic cleaning utilizes the cavitation effect generated when high-frequency sound waves propagate in a liquid—that is, tiny bubbles in the liquid rapidly grow and violently collapse under sound pressure, releasing localized high-temperature, high-pressure shock waves and high-speed microjets—to peel off contaminants adhering to the workpiece surface. It is suitable for complex geometries due to its non-contact nature and strong penetration. However, when dealing with workpieces with complex internal cavities, the cavitation effect intensity rapidly attenuates with propagation distance, making ultrasonic cleaning difficult to effectively cover deep cavities and narrow slits. Furthermore, even if contaminants are removed, free particles easily redeposit in the "dead water zones," low-flow-rate areas, or geometric dead corners within the cavity, failing to be effectively discharged with the cleaning fluid. While focused acoustic cleaning enhances local energy density through sound field focusing, its effective range is limited, and it is sensitive to the workpiece's position and orientation, making it difficult to achieve uniform cleaning of the entire cavity. Bubble cleaning creates rising bubbles by introducing compressed air into the bottom of the cleaning tank, causing macroscopic convection in the liquid and facilitating the migration of suspended particles. However, its flow field is highly random and poorly controllable, insufficiently disturbing the interior of fine structures. The cleaning effect is highly dependent on the uniformity of bubble distribution and struggles to cover hidden areas in complex cavities. Conventional rinsing or low-pressure flushing relies mainly on the overall flow of the cleaning fluid to remove contaminants. However, in channels with high aspect ratios or corners, the fluid easily forms a laminar boundary layer, making it difficult to penetrate near the wall, resulting in low cleaning efficiency. While air blowing technology can quickly remove free particles from the surface, it is almost ineffective against contaminants that are encapsulated by liquid, have strong adhesion, or are located deep within blind cavities. Although high-pressure water jet cleaning has powerful impact and peeling capabilities, its jet directionality and small diffusion angle make it unable to effectively penetrate internal structures outside the direct viewing path, and the high kinetic energy can damage delicate surfaces or microstructures. Summary of the Invention

[0004] The purpose of this invention is to provide an ultrasonic cleaning device that enhances ultrasonic cleaning through flow field and mechanical motion, thereby solving the problem that existing cleaning technologies struggle to thoroughly clean the complex internal cavities of precision parts.

[0005] Another object of the present invention is to provide a cleaning method for ultrasonic cleaning devices that enhance ultrasonic cleaning through flow field and mechanical motion.

[0006] The technical solution adopted in this invention is as follows: an ultrasonic cleaning device enhanced by flow field and mechanical motion, including an ultrasonic cleaning unit, a mechanical motion unit provided on one side of the ultrasonic cleaning unit, a flow field control unit provided opposite to the mechanical motion unit, a central controller electrically connected to the ultrasonic cleaning unit, the mechanical motion unit and the flow field control unit, and a circulating filter unit electrically connected to the central controller.

[0007] The invention is further characterized in that, The ultrasonic cleaning unit includes several ultrasonic transducers and a cleaning tank. Each ultrasonic transducer is connected to an ultrasonic amplitude transformer. The top of the ultrasonic amplitude transformer is connected to the bottom of the cleaning tank. The ultrasonic transducers are connected to an ultrasonic generator through pipes. The mechanical motion unit is located on one side of the cleaning tank. The ultrasonic generator is electrically connected to the central controller.

[0008] The mechanical motion unit includes a six-axis robotic arm, which is connected to a central controller and has grippers attached to it.

[0009] The flow field control unit includes a water cylinder and an air cylinder arranged side by side. The water cylinder and the air cylinder are respectively connected to a water pipe and an air pipe. The ends of the water pipe and the air pipe are connected to a microchannel. A connecting pipe is connected between the water pipe and the air pipe. The body of the connecting pipe is connected to a first valve. The water pipe and the air pipe are respectively connected to a water pump and an air pump. Both the water pump and the air pump are electrically connected to the central controller through a pulse switch. The end of the microchannel is arranged opposite to the clamping mechanism.

[0010] The water pipe is connected to a second valve, which is located near the water tank. Both the water pipe and the air pipe are connected to a two-way throttle valve, which is located near the microchannel.

[0011] The microchannel is designed with a variable diameter, with an inlet diameter of 5 mm and an outlet diameter of 0.1 mm.

[0012] The circulating filtration unit includes a filter tank located at the bottom of the cleaning tank. The filter tank is connected to the outlet of the flow field control unit. A pleated filter element is installed inside the filter tank. Differential pressure sensors are installed at the inlet and outlet of the pleated filter element. The differential pressure sensors are electrically connected to the central controller.

[0013] Another technical solution adopted in this invention is: a cleaning method using an ultrasonic cleaning device enhanced by flow field and mechanical motion, specifically implemented according to the following steps: Step 1. Fix the parts to be cleaned to the clamping mechanism, ensuring that the inner cavity channel is aligned with the end of the microchannel, and inject cleaning fluid into the cleaning tank until the liquid level is 5-10mm above the top of the parts; Step 2. Start the ultrasonic generator through the central controller, set the ultrasonic power to 50-1500W and the frequency to 20-400kHz. The ultrasonic transducer generates a cavitation effect, impacting the surface and inner cavity of the parts, causing particles, burrs and other excess materials to detach and become free in the cleaning solution. Continue working for 1-5 minutes. Step 3. Start the water pump and air pump, and select the flow field mode according to the state of the foreign matter: For suspended foreign matter, set the water pump pressure to 0.5-1MPa and the air pump pressure to 0.1-0.5MPa, with the two-way throttle valve switching alternately at a frequency of 0.1-1Hz, using a combination of push flow and suction flow; for deposited foreign matter, set the pulse frequency to 1-10Hz and the water pump pressure to 1-5MPa, using pulse push flow; the cleaning fluid forms a directional flow field through the microchannel, guiding the free foreign matter from the inner cavity to the bottom of the cleaning tank, and then flowing into the filter tank; Step 4. Synchronously start the mechanical motion unit and select the motion mode according to the structure of the parts: for blind cavity structures, use low-frequency oscillation and intermittent rotation; for small turning channels, use directional rotation and high-frequency vibration; for lattice structures, use omnidirectional rotation and medium-frequency vibration to ensure that all parts of the parts can contact the flow field. Step 5. The differential pressure sensor provides real-time feedback on the filter cartridge status. The central controller dynamically adjusts the ultrasonic power, mechanical motion speed, and flow field pressure based on the cleaning time and filter cartridge differential pressure to prevent secondary deposition of excess material. Step 6. After the ultrasonic cleaning unit is turned off, keep the mechanical motion unit and flow field control unit working for 30-120 seconds. Use a combination of low-pressure push flow and suction flow to clean, remove residual cleaning fluid and small foreign objects, and finally turn off all units and take out the parts.

[0014] The beneficial effects of this invention are as follows: This invention enhances the ultrasonic cleaning device through flow field and mechanical motion, organically coupling the cavitation detachment effect of the ultrasonic field, the attitude adjustment effect of the mechanical field, and the guiding and discharging effect of the flow field. This solves the problem of incomplete removal of free debris in traditional ultrasonic cleaning. The synchronous coupling cleaning mode of ultrasonic field, flow field, and mechanical motion can effectively remove deposits hidden in dead zones, allowing them to be fully suspended in the liquid medium and thoroughly removed with the help of the flow field's transport effect. The mechanical field supports rotational motion mode, and the flow field supports multiple guiding modes such as push flow and suction flow. Through the control of the central controller, it can achieve step, interlayer, lattice, and blind cavity cleaning. Cleaning of components with different structures such as diameter changes and small turns can be performed without changing special tooling; the mechanical motion unit adjusts its spatial posture to ensure that complex parts of the components can come into contact with the ultrasonic field and flow field; the microchannel design of the flow field control unit ensures that the flow field penetrates into the dead corners of the inner cavity; the circulating filtration unit removes excess material in real time to avoid secondary pollution; the residual amount of excess material on the surface of the components after cleaning is ≤0.1mg / cm²; the ultrasonic power, mechanical motion speed, and flow field pressure can all be adjusted according to the component structure to avoid damage to precision components caused by high pressure impact or violent vibration, and to ensure that the dimensional accuracy and surface quality of the components are not affected. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the ultrasonic cleaning device enhanced by flow field and mechanical motion according to the present invention; Figure 2 This is a schematic diagram of the ultrasonic cleaning unit in the ultrasonic cleaning device that enhances ultrasonic cleaning through flow field and mechanical motion according to the present invention; Figure 3 This is a schematic diagram of the mechanical motion unit in the ultrasonic cleaning device that enhances ultrasonic cleaning through flow field and mechanical motion according to the present invention; Figure 4 This is a schematic diagram of the flow field control unit in the ultrasonic cleaning device that enhances ultrasonic cleaning through flow field and mechanical motion according to the present invention; Figure 5 This is a CT scan image of the additively manufactured aluminum alloy lattice structure bracket in Embodiment 7 of the present invention before cleaning; Figure 6 This is a CT scan image of the additively manufactured aluminum alloy lattice structure bracket after cleaning in Embodiment 7 of the present invention.

[0016] In the diagram: 1. Cleaning tank, 2. Ultrasonic transducer, 3. Ultrasonic amplitude transformer, 4. Ultrasonic generator, 5. Water tank, 6. Air cylinder, 7. Water pipe, 8. Air pipe, 9. Microchannel, 10. First valve, 11. Water pump, 12. Air pump, 13. Connecting pipe, 14. Second valve, 15. Two-way throttle valve, 16. Filter tank, 17. Pleated filter element, 18. Central controller. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] This invention enhances the ultrasonic cleaning device through flow field and mechanical motion, such as Figure 1 As shown, the system includes an ultrasonic cleaning unit, a mechanical motion unit on one side of the ultrasonic cleaning unit, and a flow field control unit opposite the mechanical motion unit. The ultrasonic cleaning unit, the mechanical motion unit, and the flow field control unit are electrically connected to a central controller 18, which is electrically connected to a circulating filtration unit. The ultrasonic cleaning unit provides the basic cavitation effect, the mechanical motion unit adjusts the orientation of the components, the flow field control unit guides the discharge of free excess material, and the circulating filtration unit ensures the cleanliness of the cleaning fluid. These units work together to form a complete cleaning closed loop of separation, exposure, guidance, and filtration.

[0019] Example 1 The ultrasonic cleaning device enhances the flow field and mechanical motion, including an ultrasonic cleaning unit, a mechanical motion unit on one side of the ultrasonic cleaning unit, a flow field control unit opposite the mechanical motion unit, a central controller 18 electrically connected to the ultrasonic cleaning unit, the mechanical motion unit and the flow field control unit, and a circulating filter unit electrically connected to the central controller 18.

[0020] like Figure 2As shown, the ultrasonic cleaning unit includes several ultrasonic transducers 2 and a cleaning tank 1. Each ultrasonic transducer 2 is connected to an ultrasonic amplitude transformer 3, the top of which is connected to the bottom of the cleaning tank 1. An ultrasonic generator 4 is connected to each ultrasonic transducer 2 via a pipe. A mechanical motion unit is located on one side of the cleaning tank 1. The ultrasonic generator 4 is electrically connected to a central controller 18. The cleaning tank 1 is made of corrosion-resistant stainless steel and has a volume of 5-50L. At least 16 ultrasonic transducers 2 are embedded in the inner wall and bottom. The ultrasonic generator 4 can adjust its power from 50-1500W and frequency from 20-400kHz according to cleaning requirements, optimizing the cavitation effect intensity for debris of different sizes.

[0021] Example 2 The ultrasonic cleaning device enhances the flow field and mechanical motion, including an ultrasonic cleaning unit, a mechanical motion unit on one side of the ultrasonic cleaning unit, a flow field control unit opposite the mechanical motion unit, a central controller 18 electrically connected to the ultrasonic cleaning unit, the mechanical motion unit and the flow field control unit, and a circulating filter unit electrically connected to the central controller 18.

[0022] The ultrasonic cleaning unit includes several ultrasonic transducers 2 and a cleaning tank 1. Each ultrasonic transducer 2 is connected to an ultrasonic amplitude transformer 3. The top of the ultrasonic amplitude transformer 3 is connected to the bottom of the cleaning tank 1. The ultrasonic transducers 2 are connected to an ultrasonic generator 4 through pipes. The mechanical motion unit is set on one side of the cleaning tank 1. The ultrasonic generator 4 is electrically connected to the central controller 18.

[0023] like Figure 3 As shown, the mechanical motion unit includes a six-axis robotic arm 19, which is connected to a central controller 18. The six-axis robotic arm 19 is also connected to grippers 20. The inner side of the grippers 20 is a flexible rubber layer to prevent damage to the surface of the parts. It is suitable for parts with diameters from 1 to 500 mm and can achieve workpiece rotation of 0-30 r / min, oscillation of ±15° to ±90°, and mechanical vibration of 50-500 Hz, ensuring that all channels within the part's internal cavity are fully exposed to the flow field or gas field.

[0024] Example 3 The ultrasonic cleaning device enhances the flow field and mechanical motion, including an ultrasonic cleaning unit, a mechanical motion unit on one side of the ultrasonic cleaning unit, a flow field control unit opposite the mechanical motion unit, a central controller 18 electrically connected to the ultrasonic cleaning unit, the mechanical motion unit and the flow field control unit, and a circulating filter unit electrically connected to the central controller 18.

[0025] The ultrasonic cleaning unit includes several ultrasonic transducers 2 and a cleaning tank 1. Each ultrasonic transducer 2 is connected to an ultrasonic amplitude transformer 3. The top of the ultrasonic amplitude transformer 3 is connected to the bottom of the cleaning tank 1. The ultrasonic transducers 2 are connected to an ultrasonic generator 4 through pipes. The mechanical motion unit is set on one side of the cleaning tank 1. The ultrasonic generator 4 is electrically connected to the central controller 18.

[0026] The mechanical motion unit includes a six-axis robotic arm 19, which is connected to a central controller 18, and a gripper 20 is connected to the six-axis robotic arm 19.

[0027] like Figure 4 As shown, the flow field control unit includes a water cylinder 5 and an air cylinder 6 arranged side by side. Water cylinder 5 and air cylinder 6 are respectively connected to a water pipe 7 and an air pipe 8. The ends of water pipe 7 and air pipe 8 are connected to a microchannel 9. A connecting pipe 13 connects water pipe 7 and air pipe 8, and a first valve 10 is connected to the body of connecting pipe 13. Water pump 11 and air pump 12 are respectively connected to water pipe 7 and air pipe 8. Both water pump 11 and air pump 12 are electrically connected to the central controller 18 via a pulse switch. The end of the microchannel 9 is positioned opposite to the clamping mechanism. Water pump 11 and air pump 12 can operate bidirectionally. Water pump 11 is a high-pressure micro centrifugal water pump, and air pump 12 is an oil-free silent air pump. Both are connected to the microchannel 9 via a three-way pipe. The microchannel 9 is customized according to the internal structure of the components. The pulse switch controls the on / off frequency of air pump 12 from 1-50Hz to form a bubbling undulating flow field to meet the cleaning needs of different structures.

[0028] Example 4 The ultrasonic cleaning device enhances the flow field and mechanical motion, including an ultrasonic cleaning unit, a mechanical motion unit on one side of the ultrasonic cleaning unit, a flow field control unit opposite the mechanical motion unit, a central controller 18 electrically connected to the ultrasonic cleaning unit, the mechanical motion unit and the flow field control unit, and a circulating filter unit electrically connected to the central controller 18.

[0029] The ultrasonic cleaning unit includes several ultrasonic transducers 2 and a cleaning tank 1. Each ultrasonic transducer 2 is connected to an ultrasonic amplitude transformer 3. The top of the ultrasonic amplitude transformer 3 is connected to the bottom of the cleaning tank 1. The ultrasonic transducers 2 are connected to an ultrasonic generator 4 through pipes. The mechanical motion unit is set on one side of the cleaning tank 1. The ultrasonic generator 4 is electrically connected to the central controller 18.

[0030] The mechanical motion unit includes a six-axis robotic arm 19, which is connected to a central controller 18, and a gripper 20 is connected to the six-axis robotic arm 19.

[0031] The flow field control unit includes a water cylinder 5 and an air cylinder 6 arranged side by side. The water cylinder 5 and the air cylinder 6 are respectively connected to a water pipe 7 and an air pipe 8. The ends of the water pipe 7 and the air pipe 8 are connected to a microchannel 9. A connecting pipe 13 is connected between the water pipe 7 and the air pipe 8. A first valve 10 is connected to the body of the connecting pipe 13. A water pump 11 and an air pump 12 are respectively connected to the water pipe 7 and the air pipe 8. Both the water pump 11 and the air pump 12 are electrically connected to the central controller 18 through a pulse switch. The end of the microchannel 9 is arranged opposite to the clamping mechanism.

[0032] The water pipe 7 is connected to a second valve 14, which is located near the water cylinder 5. Both the water pipe 7 and the air pipe 8 are connected to a two-way throttle valve 15, which is located near the microchannel 9. The microchannel 9 has a variable diameter design, with an inlet diameter of 5mm and an outlet diameter of 0.1mm. The microchannel 9 is customized according to the internal structure of the components and adopts a gradient design with an inlet diameter of 5mm and an outlet diameter of 0.1mm to ensure a concentrated flow field without turbulence. The two-way throttle valve 15 enables switching between push flow (cleaning fluid is injected into the inner cavity from the outside) and suction flow (cleaning fluid is extracted from the inner cavity).

[0033] Example 5 The ultrasonic cleaning device enhances the flow field and mechanical motion, including an ultrasonic cleaning unit, a mechanical motion unit on one side of the ultrasonic cleaning unit, a flow field control unit opposite the mechanical motion unit, a central controller 18 electrically connected to the ultrasonic cleaning unit, the mechanical motion unit and the flow field control unit, and a circulating filter unit electrically connected to the central controller 18.

[0034] The ultrasonic cleaning unit includes several ultrasonic transducers 2 and a cleaning tank 1. Each ultrasonic transducer 2 is connected to an ultrasonic amplitude transformer 3. The top of the ultrasonic amplitude transformer 3 is connected to the bottom of the cleaning tank 1. The ultrasonic transducers 2 are connected to an ultrasonic generator 4 through pipes. The mechanical motion unit is set on one side of the cleaning tank 1. The ultrasonic generator 4 is electrically connected to the central controller 18.

[0035] The mechanical motion unit includes a six-axis robotic arm 19, which is connected to a central controller 18, and a gripper 20 is connected to the six-axis robotic arm 19.

[0036] The flow field control unit includes a water cylinder 5 and an air cylinder 6 arranged side by side. The water cylinder 5 and the air cylinder 6 are respectively connected to a water pipe 7 and an air pipe 8. The ends of the water pipe 7 and the air pipe 8 are connected to a microchannel 9. A connecting pipe 13 is connected between the water pipe 7 and the air pipe 8. A first valve 10 is connected to the body of the connecting pipe 13. A water pump 11 and an air pump 12 are respectively connected to the water pipe 7 and the air pipe 8. Both the water pump 11 and the air pump 12 are electrically connected to the central controller 18 through a pulse switch. The end of the microchannel 9 is arranged opposite to the clamping mechanism.

[0037] The water pipe 7 is connected to a second valve 14, which is located near the water tank 5. Both the water pipe 7 and the air pipe 8 are connected to a two-way throttle valve 15, which is located near the microchannel 9. The microchannel 9 is a variable diameter channel with an inlet diameter of 5mm and an outlet diameter of 0.1mm.

[0038] The circulating filtration unit includes a filter tank 16, which is located at the bottom of the cleaning tank 1. A pleated filter element 17 is installed inside the filter tank 16. Differential pressure sensors are installed at the inlet and outlet of the pleated filter element 17, and these sensors are electrically connected to the central controller 18. The pore size of the pleated filter element 17 is 0.1-10μm, capable of trapping excess material of different particle sizes. The differential pressure sensors, installed at the inlet and outlet of the filter element, monitor the pressure difference in real time. When the pressure difference exceeds 0.05-0.2Mpa, the discharge valve is opened to discharge the trapped excess material.

[0039] Example 6 The cleaning method of using an ultrasonic cleaning device that enhances the cleaning effect through flow field and mechanical motion is implemented according to the following steps: Step 1. Fix the parts to be cleaned to the clamping mechanism, ensuring that the inner cavity channel is aligned with the end of the microchannel 9, and inject cleaning fluid into the cleaning tank 1. The cleaning fluid is water or a special cleaning agent, and the liquid level is 5-10mm above the top of the parts. Step 2. Start the ultrasonic generator 4 through the central controller 18, set the ultrasonic power to 50-1500W and the frequency to 20-400kHz. The ultrasonic transducer 2 generates a cavitation effect, impacting the surface and inner cavity of the parts, causing particles, burrs and other excess materials to detach and float in the cleaning fluid. Continue working for 1-5 minutes. Step 3. Start water pump 11 and air pump 12, and select the flow field mode according to the state of the foreign matter: For suspended foreign matter, set the pressure of water pump 11 to 0.5MPa and the pressure of air pump to 0.1MPa, and switch the two-way throttle valve 15 alternately at a switching frequency of 1Hz, using a combination of push flow and suction flow; for deposited foreign matter, set the pulse frequency to 10Hz and the pressure of water pump 11 to 2MPa, using pulse push flow; the cleaning fluid forms a directional flow field through the microchannel 9, guiding the free foreign matter from the inner cavity to the bottom of the cleaning tank 1, and then flowing into the filter tank 16; Step 4. Synchronously start the mechanical motion unit and select the motion mode according to the component structure: For blind cavity structures, use low-frequency oscillation (±30°, 5r / min) and intermittent rotation (90° every 30s); for small turning channels, use directional rotation (10r / min) and high-frequency vibration (200Hz); for lattice structures, use omnidirectional rotation (30r / min) and medium-frequency vibration (100Hz) to ensure that all parts of the components can contact the flow field; Step 5. The differential pressure sensor provides real-time feedback on the filter element status. The central controller 18 dynamically adjusts the ultrasonic power, mechanical motion speed, and flow field pressure based on the cleaning time and filter element differential pressure to prevent secondary deposition of excess material. Step 6. After the ultrasonic cleaning unit is turned off, keep the mechanical motion unit and flow field control unit working for 30-120 seconds. Use a combination of low-pressure push flow (water pump pressure 0.1MPa) and suction flow (water pump 11 and air pump 12 running in opposite directions) to clean, remove residual cleaning fluid and small foreign objects, and finally turn off all units and take out the parts.

[0040] Example 7 The parts to be cleaned are additively manufactured aluminum alloy parts, which integrate lattice support structures and micro-internal flow channels, and are typical complex micro-internal flow channel components. The cross-sectional dimensions at the inlet of the internal flow channel are 1-2 mm, while the cross-sectional dimensions of the main internal channel are reduced to 0.2-0.3 mm. The flow channel bends in multiple directions in three-dimensional space (turning angle range of 30°-120°), and also contains blind cavities (blind cavity depth 5-10 mm, diameter 0.3-0.5 mm), stepped structures (step height 0.1-0.2 mm), and gaps in the lattice structure (gap width 0.15-0.25 mm), forming a multi-dimensional complex flow channel network.

[0041] During additive manufacturing, the dead zones of this complex flow channel structure (bottom of blind cavities, inner sides of bends, root of steps, and lattice gaps) are prone to retaining 5-50μm aluminum alloy powder (particle size distribution: 70% 5-20μm, 30% 20-50μm). Figure 5 As shown in the figure, if such residual powder is not completely removed, it will cause flow channel blockage and increased flow resistance, which will seriously affect the core functions of the components such as heat dissipation and fluid transmission. Conventional ultrasonic cleaning is difficult to reach dead corners and is prone to secondary powder adhesion.

[0042] Cleaning parameter settings: ultrasonic power 800W, frequency 40kHz; mechanical motion mode is "low-frequency oscillation (±30°, 5r / min) and intermittent rotation (90° rotation every 30s)", shortening the rotation interval time and accelerating the contact frequency between the flow channel and the cleaning medium and ultrasonic vibration at different positions. During the oscillation, a micro-amplitude rise and fall of ±0.5mm is achieved simultaneously (the rise and fall frequency is synchronized with the oscillation frequency), further reducing the fluid retention layer at the bottom of the blind cavity and ensuring that all parts of the blind cavity can fully contact the flow field; the flow field mode is "bidirectional pulse flow", that is, the push flow and suction flow alternate, the jet pressure is 0.15MPa, using the jet impact force to peel off the powder attached to the flow channel wall, and then quickly expelling the detached powder through suction flow, avoiding the powder from circulating and adhering in the flow channel; the circulating filter element has a pore size of 1μm and a pressure difference threshold of 0.1MPa.

[0043] Cleaning effect: After 5 minutes of cleaning, the residual amount of foreign matter in the blind cavity was 0.08 mg / cm², and the flowability was improved by 90%. Figure 6 As shown, the surface of the parts is free from ultrasonic impact damage and corrosion marks, and the lattice structure is intact.

Claims

1. An ultrasonic cleaning device that enhances ultrasonic cleaning through flow field and mechanical motion, characterized in that, It includes an ultrasonic cleaning unit, a mechanical motion unit on one side of the ultrasonic cleaning unit, a flow field control unit opposite to the mechanical motion unit, and a central controller (18) electrically connected to the ultrasonic cleaning unit, the mechanical motion unit and the flow field control unit. The central controller (18) is electrically connected to a circulating filter unit.

2. The ultrasonic cleaning device enhanced by flow field and mechanical motion according to claim 1, characterized in that, The ultrasonic cleaning unit includes several ultrasonic transducers (2) and a cleaning tank (1). Each ultrasonic transducer (2) is connected to an ultrasonic amplitude transformer (3). The top of the ultrasonic amplitude transformer (3) is connected to the bottom of the cleaning tank (1). The ultrasonic transducer (2) is connected to an ultrasonic generator (4) through a pipe. The mechanical motion unit is located on one side of the cleaning tank (1). The ultrasonic generator (4) is electrically connected to the central controller (18).

3. The ultrasonic cleaning device enhanced by flow field and mechanical motion according to claim 2, characterized in that, The mechanical motion unit includes a six-axis robotic arm (19), which is connected to a central controller (18). The six-axis robotic arm (19) is connected to a gripper (20).

4. The ultrasonic cleaning device enhanced by flow field and mechanical motion according to claim 1, characterized in that, The flow field control unit includes a water cylinder (5) and an air cylinder (6) arranged side by side. The water cylinder (5) and the air cylinder (6) are respectively connected to a water pipe (7) and an air pipe (8). The ends of the water pipe (7) and the air pipe (8) are connected to a microchannel (9). A connecting pipe (13) is connected between the water pipe (7) and the air pipe (8). The body of the connecting pipe (13) is connected to a first valve (10). The water pipe (7) and the air pipe (8) are respectively connected to a water pump (11) and an air pump (12). The water pump (11) and the air pump (12) are both electrically connected to a central controller (18). The end of the microchannel (9) is arranged opposite to the clamping mechanism.

5. The ultrasonic cleaning device enhanced by flow field and mechanical motion according to claim 4, characterized in that, The water pipe (7) is connected to a second valve (14), which is located near the water tank (5). Both the water pipe (7) and the air pipe (8) are connected to a two-way throttle valve (15), which is located near the microchannel (9).

6. The ultrasonic cleaning device enhanced by flow field and mechanical motion according to claim 5, characterized in that, The microchannel (9) is configured with a variable diameter, with an inlet diameter of 5 mm and an outlet diameter of 0.1 mm.

7. The ultrasonic cleaning device enhanced by flow field and mechanical motion according to claim 1, characterized in that, The circulating filtration unit includes a filter tank (16), which is located at the bottom of the cleaning tank (1). A pleated filter element (17) is installed inside the filter tank (16). Differential pressure sensors are installed at the inlet and outlet of the pleated filter element (17), and the differential pressure sensors are electrically connected to the central controller (18).

8. The cleaning method of the ultrasonic cleaning device enhanced by flow field and mechanical motion according to any one of claims 1-7, characterized in that, The specific steps are as follows: Step 1. Fix the parts to be cleaned to the clamping mechanism, ensuring that the inner cavity channel is aligned with the end of the microchannel (9), and inject cleaning fluid into the cleaning tank (1) until the liquid level exceeds the top of the parts by 5-10 mm. Step 2. Start the ultrasonic generator (4) through the central controller (18), set the ultrasonic power to 50-1500W and the frequency to 20-400kHz. The ultrasonic transducer (2) generates a cavitation effect, impacting the surface and inner cavity of the parts, causing particles, burrs and other excess materials to detach and float in the cleaning solution. Continue working for 1-5 minutes. Step 3. Start the water pump (11) and air pump (12), and select the flow field mode according to the state of the foreign matter: For suspended foreign matter, set the water pump (11) pressure to 0.5-1MPa, the air pump pressure to 0.1-0.5MPa, and the two-way throttle valve (15) to switch alternately at a frequency of 0.1-1Hz, using a combination of push flow and suction flow; For deposited foreign matter, set the pulse frequency to 1-10Hz, the water pump (11) pressure to 1-5MPa, and use pulse push flow; The cleaning liquid forms a directional flow field through the microchannel (9), guiding the free foreign matter from the inner cavity to the bottom of the cleaning tank (1), and then into the filter tank (16); Step 4. Synchronously start the mechanical motion unit and select the motion mode according to the component structure: for the blind cavity structure, use low-frequency oscillation and intermittent rotation; For small turning channels, directional rotation and high-frequency vibration are used; for lattice structures, omnidirectional rotation and medium-frequency vibration are used to ensure that all parts of the components can contact the flow field. Step 5. The differential pressure sensor provides real-time feedback on the filter element status. The central controller (18) dynamically adjusts the ultrasonic power, mechanical motion speed, and flow field pressure according to the cleaning time and filter element differential pressure to avoid secondary deposition of excess material. Step 6. After the ultrasonic cleaning unit is turned off, keep the mechanical motion unit and flow field control unit working for 30-120 seconds. Use a combination of low-pressure push flow and suction flow to clean, remove residual cleaning fluid and small foreign objects, and finally turn off all units and take out the parts.

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