Aluminum alloy die casting surface cleaning device and working method thereof

Abstract

The invention discloses an aluminum alloy die casting surface cleaning device and a working method thereof, and belongs to the technical field of aluminum alloy machining, the aluminum alloy die casting surface cleaning device comprises a cleaning cabin, a clamping temperature control mechanism is slidably connected in the cleaning cabin, and an atomization dissolving mechanism, a blind hole cleaning mechanism and a hot air treatment mechanism are sequentially arranged in the cleaning cabin in the conveying direction; compared with a traditional single hot water spray washing or soaking ultrasonic treatment mode, the aluminum alloy die casting inner hole cleaning device has the advantages that the cleaning efficiency, the cleanliness and the automation degree are remarkably improved, and the aluminum alloy die casting inner hole cleaning device is suitable for cleaning aluminum alloy die casting inner hole portions with complex structures.

Description

Technical Field

[0001] This invention belongs to the field of aluminum alloy processing technology, specifically a surface cleaning device for aluminum alloy die castings and its working method. Background Technology

[0002] After die casting, most parts are naturally cooled, meaning the freshly demolded aluminum alloy die castings are piled up in a metal collection box or conveyor and allowed to cool to room temperature. Because the die casting process requires the addition of release agents and circulating lubricants, the surface of aluminum alloy die castings often becomes heavily contaminated with oil, along with oxide impurities and machining debris deposited during cooling. If these contaminants are not removed promptly, they will affect the surface quality of the die castings, leading to poor adhesion, failure, or functional interference during sales and subsequent surface treatments (such as electroplating, spraying, and powder coating). Therefore, to ensure the commercial quality of die castings, a thorough cleaning process must be completed before they leave the factory.

[0003] To address the aforementioned problems, Chinese utility model patent CN205270237U discloses a cleaning device for aluminum alloy die-castings, including a support frame, a conveyor belt, multiple worktables (a first worktable, a second worktable, and a third worktable), a collection tank, and a wastewater recovery system. The device achieves automated cleaning of aluminum alloy die-castings by setting up a spray zone, a rinsing zone, a hot water rinsing zone, and a drying zone. Specifically, the spray zone is equipped with multiple nozzles connected to a top return water pipe; the spray liquid falls into the collection tank and is recycled through a wastewater filtration and recovery device at the bottom, effectively improving cleaning efficiency and saving water resources. This utility model, to a certain extent, improves the problems of low efficiency and high water consumption in traditional cleaning methods.

[0004] However, the device still primarily relies on hot water spraying and static ultrasonic cleaning for cleaning. When dealing with the complex internal structures of aluminum alloy die-cast parts, it still suffers from numerous blind spots and difficulty in removing residual contaminants. Furthermore, oil stains and release agents on the aluminum alloy surface form strong adhesion layers due to high-temperature carbonization or repeated adhesion, which are difficult to completely remove under conventional hot water spraying or ultrasonic cleaning alone, affecting the reliability of subsequent processing procedures. Summary of the Invention

[0005] The purpose of this invention is to provide a surface cleaning device for aluminum alloy die castings and its working method, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] A surface cleaning device for aluminum alloy die castings and its working method are provided. The device includes a cleaning chamber, in which a clamping temperature control mechanism is slidably connected. Inside the cleaning chamber, an atomizing dissolving mechanism, a blind hole cleaning mechanism, and a hot air treatment mechanism are sequentially arranged along the conveying direction. An ultrasonic vibration mechanism is provided at the bottom of the clamping temperature control mechanism.

[0007] Furthermore, the cleaning chamber is equipped with a transport track, on which a ring platform is mounted. An ultrasonic vibration mechanism is mounted on the ring platform, and a clamping temperature control mechanism is mounted on the ultrasonic vibration mechanism. The clamping temperature control mechanism includes a clamping frame, on which an electric push rod is mounted. A heating component is connected to the electric push rod via a heat insulation plate. An electric heating clamping plate is mounted on one side of the heating component, and the electric heating clamping plate is used to heat the aluminum alloy casting. The clamping temperature control mechanism is fixed on the ultrasonic oscillation mechanism. Through the rigid contact interface between the electric heating clamp plate and the aluminum alloy casting, the high-frequency oscillation energy can be directly transferred to the surface and interior of the aluminum alloy casting, thereby forming a cavitation effect in the cleaning fluid medium, improving the oil stain removal efficiency, and is suitable for difficult-to-clean parts such as internal holes and cavities.

[0008] Furthermore, the ultrasonic oscillation mechanism includes an ultrasonic transducer, which is mounted on a ring-shaped platform and connected to a clamping frame via an amplitude-modulating transmission rod. The electric heating clamp plate is then placed in close contact with the aluminum alloy die casting, forming a vibration path. This allows the high-frequency oscillation energy to be directly transmitted to the surface and interior of the aluminum alloy casting, thereby creating a cavitation effect in the cleaning fluid medium and improving the oil removal efficiency.

[0009] Furthermore, the atomizing dissolving mechanism includes an atomizing annular track, which is disposed on one side of the inner wall of the cleaning chamber, and a plurality of atomizing dissolving nozzles are slidably connected to the atomizing annular track; Multiple atomizing dissolving nozzles slide along an atomizing ring track and are connected to the cleaning fluid supply system. During the movement, they can continuously spray atomized cleaning fluid onto the workpiece surface. At this time, the oil stains softened during the heating stage will undergo an emulsification reaction after contacting the atomized cleaning fluid because the cleaning agent contains surfactants. This will transform the hydrophobic oil stains into an oil-in-water emulsion, which will then detach from the surface of the aluminum alloy casting.

[0010] Furthermore, the blind hole cleaning mechanism includes a circular track, on which a plurality of cleaning seats are slidably connected. Each of the cleaning seats is provided with a position adjustment mechanism, and each position adjustment mechanism is provided with an angle adjustment mechanism. An insert-type spray washing component is fixedly connected to the angle adjustment mechanism. The insertable spray cleaning component is designed to adapt to the cleaning needs of internal holes in different directions by using a circular track, a position adjustment mechanism, and an angle adjustment mechanism. The insertable spray cleaning component can penetrate deep into the internal hole and remove and rinse away internal oil stains, release agents, and other residues through high-pressure spraying or atomization cleaning.

[0011] Furthermore, the insert-type spray washing assembly includes an oil return cylinder, which is fixedly connected to the angle adjustment mechanism. A nozzle assembly is detachably connected inside the oil return cylinder, and several oil return channels are provided inside the outer wall of the oil return cylinder. Driven by the position adjustment mechanism and the angle adjustment mechanism, the nozzle assembly is precisely inserted into the inner hole, and the atomizing nozzle is located in the middle or bottom of the cavity. The internal cleaning fluid is driven by a high-pressure pump and atomized from the nozzle to form a fine mist high-speed liquid flow. The high-energy particles formed by the mist flow impact the oil stains and the carbonized deposited layer of the release agent on the hole wall. The oil stains are desorbed through dynamic pressure flushing and liquid emulsification reaction. The residual liquid and oil mixture generated after cleaning are extracted through the return oil channel of the return oil cylinder and introduced into the centralized drainage system under the action of the external negative pressure suction system.

[0012] Furthermore, the nozzle assembly includes a spray bar body, which is detachably connected to the inside of the oil return cylinder via a threaded cover, and an atomizing nozzle is connected below the spray bar body; Driven by the high-pressure liquid supply system, the cleaning fluid flows from the internal channel of the spray bar body to the nozzle. Through the atomizing nozzle, the cleaning fluid is atomized and sprayed out at a speed of 10~16m / s, forming a directional mist-like impact flow. This effectively cleans the inner surface and bottom of the inner hole. After spraying, the liquid is discharged through the return oil channel of the return oil cylinder under the action of the negative pressure suction system, avoiding the accumulation of residual liquid and improving cleaning efficiency and the drying speed of the inner cavity.

[0013] Furthermore, the distance H between the atomizing nozzle and the height of the return oil cylinder is 8-15 mm, and the distance D between the atomizing nozzle and the width of the inner wall of the return oil cylinder is 8-15 mm. This size range ensures that the atomized spray fully expands in the blind hole and has sufficient rinsing kinetic energy, while facilitating the smooth return of atomized residual liquid to the negative pressure oil return system, effectively improving cleaning efficiency and return flow.

[0014] Furthermore, the outer wall of the oil return cylinder is also provided with a limiting ring. The outer diameter of the limiting ring is slightly larger than the inner diameter. When the oil return cylinder is inserted as a whole, it is mechanically limited to prevent the atomizing nozzle from hitting the bottom of the inner hole, avoid the atomizing nozzle from breaking, ensure that the insertion distance is constant, and maintain the optimal spray distance.

[0015] A working method of an aluminum alloy die casting surface cleaning device, S1: After the aluminum alloy die casting workpiece is clamped and positioned by the clamping temperature control mechanism, the aluminum alloy die casting workpiece is heated by the electric heating fixture plate to soften the oil stains on the surface of the aluminum alloy die casting workpiece. S2. The transport track moves the heated aluminum alloy casting to the area below the atomizing and dissolving mechanism, where atomized cleaning fluid is sprayed through several atomizing and dissolving nozzles. S3. Simultaneously with atomization and dissolution, the ultrasonic oscillation mechanism is activated, which vibrates the temperature control mechanism and the aluminum alloy die-cast workpiece held on the electric heating fixture plate. S4. The insertion spray cleaning component is adjusted to extend into an inner hole of the aluminum alloy die-casting workpiece through the circular track, position adjustment mechanism and angle adjustment mechanism for cleaning. The inner hole is cleaned by the insertion spray cleaning component. After cleaning, the residual liquid is absorbed through several return liquid channels. The above operation is repeated to clean the inner holes of the aluminum alloy die-casting workpiece in sequence. S5. The transport track carries the cleaned aluminum alloy die-cast workpiece, which is then cleaned by a hot air treatment mechanism.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: During the simultaneous atomization cleaning process, the control system activates the ultrasonic oscillation mechanism. This mechanism drives the entire fixture to vibrate at high frequency, thereby achieving vibration excitation of the aluminum alloy die-cast workpiece through coupling between the fixture and the workpiece. The high-frequency oscillation generates a cavitation effect on the workpiece surface and in the liquid film within the inner pores. The impact force from the bursting of microbubbles further removes the oil layer and internal residual liquid, improving cleaning efficiency and the cleaning effect on deep holes and blind holes. The transport track further conveys the atomized and dissolved material to the blind hole cleaning mechanism area. The blind hole cleaning mechanism can penetrate deep into the internal channels of the die-cast aluminum alloy workpiece and spray the cleaning agent. The high-pressure cleaning fluid achieves high-pressure flushing of the inner wall of the hole, extracting residual liquid and oil stains to prevent secondary pollution. This cleaning action can be automatically repeated to complete the cleaning of the porous structure of the die casting one by one. After cleaning, the aluminum alloy casting is moved by the clamping temperature control mechanism to the bottom of the hot air treatment mechanism for drying. Through the above-mentioned multi-stage coordinated cleaning, highly adhesive oil stains and mold release agent residues can be effectively removed. Compared with the traditional single hot water spraying or immersion ultrasonic treatment method, this device has significant improvements in cleaning efficiency, cleanliness and automation. It is suitable for cleaning the inner hole parts of aluminum alloy die castings with complex structures. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 A schematic diagram of the overall structure of a surface cleaning device for aluminum alloy die castings; Figure 2 This is a schematic diagram of the clamping temperature control mechanism provided by the present invention; Figure 3 A schematic diagram of the blind hole cleaning mechanism provided by the present invention; Figure 4 This is a schematic diagram of the insert-type spray washing assembly structure provided by the present invention; Figure 5This is a schematic cross-sectional view of the insert-type spray washing assembly provided by the present invention.

[0019] In the diagram: 1. Cleaning chamber; 11. Transport track; 12. Circular platform; 2. Clamping temperature control mechanism; 21. Clamping frame; 22. Electric push rod; 23. Electric heating clamp plate; 24. Heating assembly; 3. Atomizing and dissolving mechanism; 31. Atomizing circular track; 32. Atomizing and dissolving nozzle; 4. Blind hole cleaning mechanism; 41. Circular track; 42. Cleaning base; 43. Position adjustment mechanism; 44. Angle adjustment mechanism; 441. Micro motor; 442. Mounting ring; 5. Hot air treatment mechanism; 6. Ultrasonic oscillation mechanism; 61. Ultrasonic transducer; 62. Amplitude-modulated transmission rod; 7. Insertion spray washing assembly; 71. Oil return cylinder; 72. Nozzle assembly; 721. Spray bar body; 722. Threaded cover; 723. Atomizing nozzle; 73. Oil return channel; 74. Limiting ring. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] 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 only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0026] Please see Figure 1-5 As shown in the embodiment of the present invention, an aluminum alloy die casting surface cleaning device and its working method include a cleaning chamber 1, a clamping temperature control mechanism 2 slidably connected inside the cleaning chamber 1, an atomizing dissolving mechanism 3, a blind hole cleaning mechanism 4 and a hot air treatment mechanism 5 sequentially arranged inside the cleaning chamber 1 along the conveying direction of the annular track, an ultrasonic vibration mechanism 6 is arranged at the bottom of the clamping temperature control mechanism 2, and the hot air treatment mechanism 5 includes several hot air nozzles for drying the cleaned aluminum alloy casting; The aluminum alloy die casting is placed in the clamping temperature control mechanism 2 by a robot arm. The clamping temperature control mechanism 2 is used for precise clamping and positioning. After the clamping temperature control mechanism is powered on, it heats the aluminum alloy die casting to the set temperature (50℃~65℃) and holds it for 60~90 seconds. This causes the oil stains and release agent layer attached to the surface of the die casting to soften, expand or even partially melt, thereby reducing their adhesion to the aluminum alloy surface. After being heated, the aluminum alloy casting is conveyed along the track to the atomizing and dissolving mechanism 3. The cleaning liquid sprayed by the atomizing and dissolving mechanism 3 covers the surface and recessed parts of the workpiece. The atomizing cleaning liquid contains non-ionic or amphoteric surfactants, which can quickly emulsify and soften the oil stains and achieve preliminary cleaning of the surface and inner hole of the aluminum alloy casting. During the simultaneous atomization cleaning process, the control system activates the ultrasonic oscillation mechanism 6, which drives the entire fixture to vibrate at high frequency. This, through the coupling between the fixture and the workpiece, excites the aluminum alloy die-cast workpiece. The high-frequency oscillation generates a cavitation effect on the workpiece surface and in the liquid film within the inner pores. The impact force from the bursting of microbubbles further removes the oil layer and internal residual liquid, improving cleaning efficiency and the cleaning effect on deep holes, blind holes, and other structures. The transport track 11 further conveys the atomized and dissolved material from the atomization dissolution mechanism 3 to the blind hole cleaning mechanism 4 area. The blind hole cleaning mechanism can penetrate deep into the internal channels of the aluminum alloy casting and spray pressurized cleaning fluid to achieve high pressure on the inner wall of the hole. The cleaning process involves rinsing and draining residual liquid and oil to prevent secondary contamination. This cleaning action can be repeated automatically, cleaning the porous structure of the die-cast parts one by one. After cleaning, the aluminum alloy casting is moved by the clamping temperature control mechanism 2 to the bottom of the hot air treatment mechanism 5, where it is dried by several hot air heads. Through the above-mentioned multi-stage coordinated cleaning, highly adhesive oil and mold release agent residues can be effectively removed. It has good adaptability and thorough cleaning for aluminum alloy die-cast parts with complex structures, many internal holes, and deep cavities. Compared with the traditional single hot water spraying or immersion ultrasonic treatment method, this device has significant improvements in cleaning efficiency, cleanliness, and automation.

[0027] In one embodiment, see Figure 1 and Figure 2 As shown, the cleaning chamber 1 is equipped with a transport track 11, a ring platform 12 is mounted on the transport track 11, an ultrasonic vibration mechanism 6 is mounted on the ring platform 12, and a clamping temperature control mechanism 2 is mounted on the ultrasonic vibration mechanism 6. The clamping temperature control mechanism 2 includes a clamping frame 21, an electric push rod 22 is mounted on the clamping frame 21, and a heating component 24 is connected to the electric push rod 22 via a heat insulation plate 25. The heat insulation plate 25 is made of ceramic fiber to reduce heat conduction to the clamping frame 21. An electric heating clamp plate 23 is mounted on one side of the heating component 24. The heating component 24 is made of resistance heating wire evenly wound and filled with thermally conductive insulating ceramic. The electric heating clamp plate 23 is made of high thermal conductivity aluminum alloy (such as 6061-T6), with an arc-shaped chamfer on the surface to adapt to curved castings. The electric heating clamp plate 23 is used to heat aluminum alloy castings. The clamping frame 21 supports the electric heating clamping plate 23 and is rigidly connected to the ultrasonic oscillation mechanism 6. The electric heating clamping plates 23 are respectively arranged on the left and right sides inside the clamping frame 21. After the heating component 24 is powered on, it transfers heat to the aluminum alloy casting and maintains it continuously and stably to ensure the preheating effect of the workpiece. The electric heating clamping plate 23 uniformly heats the surface of the aluminum alloy die casting, causing the oil, release agent and other organic contaminants attached to its surface to soften, expand or even initially carbonize, thereby reducing their adhesion to the metal surface and facilitating subsequent emulsification and rinsing. The clamping temperature control mechanism 2 is fixed on the ultrasonic oscillation mechanism 6. Through the rigid contact interface between the electric heating clamping plate 23 and the aluminum alloy casting, the high-frequency oscillation energy can be directly transferred to the surface and interior of the aluminum alloy casting, thereby forming a cavitation effect in the cleaning fluid medium, improving the oil removal efficiency, and is suitable for difficult-to-clean parts such as internal holes and cavities.

[0028] In one embodiment, see Figure 1 and Figure 2 As shown, the ultrasonic oscillation mechanism 6 includes an ultrasonic transducer 61, which is mounted on the annular platform 12. The ultrasonic transducer 61 is connected to the clamping frame 21 via an amplitude-modulated transmission rod 62 (the specific models of the ultrasonic transducer 61 are NTK-2040, BLT-2735, etc.). The ultrasonic transducer 61 transmits mechanical wave energy to the clamping frame 21 via the amplitude-modulated transmission rod 62, and the clamping frame 21 transmits it to the heating clamp plate 23. The heating clamp plate 23 then closely adheres to the aluminum alloy die-casting, forming a vibration "path". The high-frequency oscillation energy can be directly transmitted to the surface and interior of the aluminum alloy casting, thereby creating a cavitation effect in the cleaning fluid medium and improving the oil removal efficiency.

[0029] In one embodiment, see Figure 1 As shown, the atomizing dissolving mechanism 3 includes an atomizing annular track 31, which is set on one side of the inner wall of the cleaning chamber 1. Several atomizing dissolving nozzles 32 are slidably connected to the atomizing annular track 31 and are also set on one side of the inner wall of the cleaning chamber 1. The track is arranged in a closed ring or arc shape to guide the atomizing dissolving nozzles 32 to slide along the annular track in the cleaning chamber 1. The multiple atomizing dissolving nozzles 32 slide along the atomizing annular track 31 and are connected to the cleaning fluid supply system. During the movement, they can continuously spray atomized cleaning fluid onto the surface of the workpiece. At this time, the oil stains softened during the heating stage will undergo an emulsification reaction after contacting the atomized cleaning fluid because the cleaning agent contains surfactants. This will convert the hydrophobic oil stains into an oil-in-water emulsion, which will then detach from the surface of the aluminum alloy casting.

[0030] In one embodiment, see Figure 1 , Figure 3As shown, the blind hole cleaning mechanism 4 includes a circular track 41, on which several cleaning seats 42 are slidably connected. The circular track 41 drives the cleaning seats 42 to move on its upper part, which is used to initially adjust the position of the insert spray cleaning assembly 7 from the green aluminum alloy casting to be cleaned, so that it is near the inner hole of the aluminum alloy casting that needs to be cleaned. Each of the cleaning seats 42 is provided with a position adjustment mechanism 43 (the position adjustment mechanism 43 is an XYZ three-axis control module, the specific model of which is AZX-ACT three-axis module, etc.). The position adjustment mechanism 43 is used to precisely adjust the specific height position and horizontal position of the insert spray cleaning assembly 7 from the inner hole of the green aluminum alloy casting to be cleaned, and the angle adjustment. The entire mechanism 44 is used to control the specific angle position of the insert spray cleaning component 7. The angle adjustment mechanism 44 includes a micro motor 441 and a mounting ring 442. The insert spray cleaning component 7 is detachably connected to the mounting ring 442 and is used to adjust the angle of the insert spray cleaning component 7. The angle adjustment mechanism 44 is driven by the micro motor 441, which drives the mounting ring 442 to adjust the position, so that the insert spray cleaning component 7 can swing within the range of 0°-30° to adapt to the cleaning needs of the inner hole in different directions. The insert spray cleaning component 7 can penetrate into the inner hole and complete the peeling and rinsing of internal oil stains, release agents and other residues through high-pressure spraying or atomization cleaning, so as to accurately clean the aluminum alloy casting.

[0031] In one embodiment, see Figure 3 , Figure 4 and Figure 5 As shown, the insert-type spray cleaning assembly 7 includes an oil return cylinder 71, which is fixedly connected to the angle adjustment mechanism 44. A nozzle assembly 72 is detachably connected inside the oil return cylinder 71. An oil return channel 73 is provided inside the outer ring of the oil return cylinder 71. The insert-type spray cleaning assembly 7 is connected to the oil return cylinder 71 by a threaded connection. After the cleaning fluid impacts the inner hole, it forms a liquid film mixed with oil. The nozzle assembly 72 is precisely inserted into the inner hole under the drive of the position adjustment mechanism 43 and the angle adjustment mechanism 44. The atomizing nozzle 723 is located in the middle or bottom of the cavity. The internal cleaning fluid is driven by a high-pressure pump. The liquid is atomized from the atomizing nozzle 723, forming a fine mist high-speed liquid flow. The high-energy particles formed by the mist flow impact the oil stains and the carbonized deposited layer of the release agent on the hole wall. The oil stains are desorbed through dynamic pressure scouring and liquid emulsification reaction. The residual liquid and oil mixture generated after cleaning are extracted through the return oil channel 73 of the return oil cylinder 71 and introduced into the centralized drainage system under the action of the external negative pressure suction system. This achieves simultaneous treatment of cleaning and residual liquid, improves cleaning efficiency and internal cavity drying rate, or the oil stains drip naturally from the outside of the aluminum alloy casting by gravity, effectively preventing liquid residue, cavity pollution backflow or liquid accumulation.

[0032] In one embodiment, see Figure 3 , Figure 4 and Figure 5As shown, the nozzle assembly 72 includes a spray bar body 721, which is detachably connected to the inside of the oil return cylinder 71 via a threaded cover 722. An atomizing nozzle 723 is connected below the spray bar body 721. The oil return cylinder 71 is fixedly installed below the angle adjustment mechanism 44. The oil return cylinder 71 has a hollow structure with a central cavity for the nozzle assembly 72. An oil return channel 73 is formed in the outer ring of the oil return cylinder 71, which is connected to an external negative pressure system. The threaded cover 722 is installed on the oil return cylinder by tightening the threads. The body 71 has a central hole, forming a detachable connection structure. The main body 721 of the spray bar is a slender hollow structure. Under the drive of the high-pressure liquid supply system, the cleaning fluid flows from the internal channel of the spray bar body 721 to the nozzle and passes through the atomizing nozzle 723. The cleaning fluid is atomized and sprayed out at a speed of 10~16m / s, forming a directional mist-like impact flow, which efficiently cleans the inner surface and bottom of the inner hole. After spraying, the liquid is discharged through the return oil channel 73 of the return oil cylinder 71 under the action of the negative pressure suction system, avoiding the accumulation of residual liquid and improving the cleaning efficiency and the drying speed of the inner cavity.

[0033] In one embodiment, see Figure 3 , Figure 4 and Figure 5 As shown, the height distance H between the atomizing nozzle 723 and the return oil cylinder 71 is 8-15mm, the width distance D between the atomizing nozzle 723 and the inner wall of the return oil cylinder 71 is 8-15mm, the vertical height H between the lower end of the atomizing nozzle 723 and the bottom of the return oil cylinder 71 is 10mm, and the gap width D between the outer side of the atomizing nozzle 723 and the inner wall of the return oil cylinder 71 is 10mm. This size range can ensure that the atomized spray is fully expanded in the blind hole and has sufficient flushing kinetic energy, while facilitating the smooth return of the atomized residual liquid to the negative pressure return oil system, effectively improving cleaning efficiency and return liquid smoothness.

[0034] In one embodiment, see Figure 3 , Figure 4 and Figure 5 As shown, the outer wall of the oil return cylinder 71 is also provided with a limiting ring 74. The outer diameter of the limiting ring 74 is slightly larger than the inner diameter. When the oil return cylinder 71 is inserted into the inner hole, it is mechanically limited to prevent the atomizing nozzle 723 from hitting the bottom of the inner hole, avoid the atomizing nozzle 723 from breaking, ensure that the insertion distance is constant, and maintain the optimal spray distance.

[0035] In one embodiment, see Figure 1 and Figure 2 As shown, aluminum alloy die-cast parts have complex surface and internal hole structures, making them difficult to clean due to oil stains and carbonized residues of release agents. To address this, another aspect of the present invention provides a method for operating an aluminum alloy die-cast part surface cleaning device, comprising the following steps: S1. The aluminum alloy die-cast workpiece is clamped and positioned by the clamping temperature control mechanism 2. The electric heating clamp plate 23 is heated by the heating component 24 to the surface of the aluminum alloy die-cast workpiece to 50°C~65°C for 60~90s to soften the oil stains on the surface of the aluminum alloy die-cast workpiece. In this step, the temperature range can reduce the viscosity of the oil and release agent layer adhering to the surface of the aluminum alloy casting; the thermal diffusion effect can be used to promote micro-expansion and desorption between the oil film and the substrate interface; at the same time, heating can also soften the release agent layer that has been initially carbonized on the surface and reduce its adhesion strength. S2, the transport track 11 drives the heated aluminum alloy casting to move to the underside of the atomizing and dissolving mechanism 3, and sprays atomized cleaning fluid through several atomizing and dissolving nozzles 32 to emulsify and dissolve the softened oil stains for surface cleaning and preliminary cleaning of internal oil stains. S3. While the atomization and dissolution are being carried out, the ultrasonic oscillation mechanism 6 is activated. The ultrasonic oscillation mechanism 6 vibrates the clamping frame 21 and the aluminum alloy die-casting workpiece clamped on the electric heating clamp plate 23 to remove oil stains from its surface and some oil stains from its inner hole. The oscillation frequency of the ultrasonic transducer 61 is 25-60kHz and the action time is 30-60s. S4. Adjust the specific position of the insertion spray cleaning component 7 by means of the position adjustment mechanism 43, the circular track 41 and the angle adjustment mechanism 44. Insert the insertion spray cleaning component 7 into an inner hole of the aluminum alloy die-casting workpiece for cleaning. After cleaning, the residual liquid is absorbed through several return channels. Repeat the above operation to completely clean the oil stains in the inner hole of the aluminum alloy die-casting workpiece. S5 and transport track 11 carry the cleaned aluminum alloy die-cast workpiece, which is then blown by hot air from hot air treatment mechanism 5. The hot air temperature of hot air treatment mechanism 5 is 80-100℃ and the duration is 20-40s. The hot air evaporates the residual liquid and removes the surface oil, completing the drying process. The hot air flow removes residual micro-droplets from the pores and surface, preventing water spots from forming after drying. The hot air disturbance enhances the air convection speed inside the micropores, accelerating the drying speed inside the pores.

[0036] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A surface cleaning device for aluminum alloy die-cast parts, comprising a cleaning chamber (1), characterized in that, The cleaning chamber (1) is slidably connected to a clamping temperature control mechanism (2). The cleaning chamber (1) is arranged in sequence along the conveying direction with an atomizing dissolving mechanism (3), a blind hole cleaning mechanism (4), and a hot air treatment mechanism (5). The clamping temperature control mechanism (2) is provided with an ultrasonic vibration mechanism (6) at its bottom.

2. The surface cleaning device for aluminum alloy die-casting parts according to claim 1, characterized in that, The cleaning chamber (1) is equipped with a transport track (11), a ring platform (12) is provided on the transport track (11), an ultrasonic vibration mechanism (6) is provided on the ring platform (12), a clamping temperature control mechanism (2) is provided on the ultrasonic vibration mechanism (6), the clamping temperature control mechanism (2) includes a clamping frame (21), an electric push rod (22) is provided on the clamping frame (21), a heating component (24) is connected to the electric push rod (22) through a heat insulation plate (25), an electric heating clamp plate (23) is provided on one side of the heating component (24), and the electric heating clamp plate (23) is used to heat the aluminum alloy casting.

3. The surface cleaning device for aluminum alloy die-casting parts according to claim 2, characterized in that, The ultrasonic oscillation mechanism (6) includes an ultrasonic transducer (61), which is mounted on a ring platform (12). The ultrasonic transducer (61) is connected to a clamping frame (21) via an amplitude-modulated transmission rod (62).

4. The surface cleaning device for aluminum alloy die-casting parts according to claim 3, characterized in that, The atomizing dissolving mechanism (3) includes an atomizing annular track (31), which is located on one side of the inner wall of the cleaning chamber (1). Several atomizing dissolving nozzles (32) are slidably connected to the atomizing annular track (31).

5. The surface cleaning device for aluminum alloy die-casting parts according to claim 1, characterized in that, The blind hole cleaning mechanism (4) includes a circular track (41), on which a plurality of cleaning seats (42) are slidably connected. Each of the cleaning seats (42) is provided with a position adjustment mechanism (43), and each of the position adjustment mechanisms (43) is provided with an angle adjustment mechanism (44). An insert-type spray washing assembly (7) is fixedly connected to the angle adjustment mechanism (44).

6. The surface cleaning device for aluminum alloy die-casting parts according to claim 5, characterized in that, The insert-type spray washing assembly (7) includes an oil return cylinder (71), which is fixedly connected to the angle adjustment mechanism (44). The oil return cylinder (71) is detachably connected to a nozzle assembly (72), and several oil return channels (73) are provided inside the outer wall of the oil return cylinder (71).

7. The surface cleaning device for aluminum alloy die-casting parts according to claim 6, characterized in that, The nozzle assembly (72) includes a spray bar body (721), which is detachably connected to the inside of the oil return cylinder (71) via a threaded cover (722). An atomizing nozzle (723) is connected below the spray bar body (721).

8. The surface cleaning device for aluminum alloy die-casting parts according to claim 7, characterized in that, The atomizing nozzle (723) is 8 to 15 mm high from the return oil cylinder (71), and the atomizing nozzle (723) is 8 to 15 mm wide from the inner wall of the return oil cylinder (71).

9. The surface cleaning device for aluminum alloy die-casting parts according to claim 6, characterized in that, The outer wall of the return oil cylinder (71) is also provided with a limiting ring (74).

10. The working method of the surface cleaning device for aluminum alloy die castings according to any one of claims 4-9, characterized in that, S1. After the aluminum alloy die-casting workpiece is clamped and positioned by the clamping temperature control mechanism (2), the aluminum alloy die-casting workpiece is heated by the electric heating clamp plate (23) to soften the oil stains on the surface of the aluminum alloy die-casting workpiece. S2, the transport track (11) moves the heated aluminum alloy casting to the underside of the atomizing dissolving mechanism (3), and sprays atomized cleaning liquid through several atomizing dissolving nozzles (32); S3. At the same time as atomization and dissolution, the ultrasonic oscillation mechanism (6) is started. The temperature control mechanism (2) is vibrated by the ultrasonic oscillation mechanism (6) to vibrate the aluminum alloy die-casting workpiece held on the electric heating clamp plate (23). S4. The insertion spray cleaning assembly (7) is adjusted to extend into an inner hole of the aluminum alloy die-casting workpiece through the circular track (41), position adjustment mechanism (43) and angle adjustment mechanism (44) for cleaning. The inner hole is cleaned by the insertion spray cleaning assembly (7). After cleaning, the residual liquid is absorbed through several return channels (73). The above operation is repeated to clean the inner hole of the aluminum alloy die-casting workpiece in sequence. S5. The transport track (11) carries the cleaned aluminum alloy die-cast workpiece, which is then blown by the hot air treatment mechanism (5).

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