Aerospace mold ultrasonic cleaning device and cleaning method

Abstract

The application discloses an aviation mold ultrasonic cleaning device and a cleaning method, relates to the technical field of mold cleaning, and provides an aviation mold ultrasonic cleaning device which comprises a cylinder body, a lifting rack, ultrasonic cleaning devices, a detection device, a drainage device and a controller. The upper part of the cylinder body is provided with an opening, and the lifting rack for jacking up a mold is movably arranged at the bottom of the cylinder. The ultrasonic cleaning devices are embedded around the inner cavity of the cylinder body and directly contact with cleaning liquid. The detection device comprises a mold detection device and a cleaning liquid detection device, and is used for scanning, identifying and detecting the concentration of dirt dispersed in the cleaning liquid. The drainage device is arranged at the bottom of the side wall of the inner cavity of the cylinder body and is used for controlling the discharge of the cleaning liquid in the cylinder. The controller is arranged on the outer wall of the cylinder body and is electrically connected with the detection device. The application can completely clean the complex molding surface of the mold, various deep holes and blind holes under the premise of guaranteeing the precision of the mold, and brings convenience to actual production.

Description

Technical Field

[0001] This invention relates to the field of mold cleaning technology, specifically to an ultrasonic cleaning device and method for aircraft molds. Background Technology

[0002] In the aerospace industry, there are strict requirements for the cleanliness of molds. The cleanliness of aerospace molds not only affects their service life but also directly impacts the quality and safety of the products they produce. To ensure the cleanliness requirements of molds, a cleaning technology is needed that can completely clean the complex forming surfaces of the mold, including various deep and blind holes, without compromising the mold's precision.

[0003] Ultrasonic cleaning technology utilizes the cavitation effect of high-frequency sound waves on liquids to generate dense, tiny vacuum bubbles in the target liquid for cleaning. Once generated, these vacuum bubbles rapidly increase in volume and burst, releasing shock waves in all directions. When the mold to be cleaned is immersed in the cavitation liquid, the dirt and impurities adhering to the mold are peeled off and dispersed into the cavitation liquid by the shock waves released by the vacuum bubbles, achieving a cleaning effect. Furthermore, the cavitation effect also causes agitation and movement in the cavitation liquid, enabling the cleaning of hard-to-clean holes and grooves without damaging the mold.

[0004] Current ultrasonic cleaning devices cannot monitor and determine whether the mold is clean, requiring manual judgment, resulting in low automation. Furthermore, existing ultrasonic cleaning devices do not make full use of the cleaning fluid, often replacing it before it expires, which is not economical or environmentally friendly. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an ultrasonic cleaning device and cleaning method for aircraft molds, so as to achieve safe and efficient cleaning of large aircraft molds.

[0006] The present invention discloses a cleaning method for an ultrasonic cleaning device for aircraft molds, wherein the ultrasonic cleaning device for aircraft molds includes a cylinder, a lifting platform, an ultrasonic cleaning device, a detection device, a drainage device, and a controller. The cylinder body has an opening at the top, and a lifting platform for lifting molds is movably installed at the bottom of the cylinder. Several ultrasonic cleaning devices are embedded around the inner cavity of the cylinder, all of which are in direct contact with the cleaning fluid; The testing equipment includes a mold testing device and a cleaning fluid testing device. The mold testing device is located at the cylinder inlet and scans and identifies the mold during hoisting. Several cleaning fluid detection devices are installed on the inner wall of the cylinder. During mold cleaning, they directly contact the cleaning fluid to detect the concentration of dirt dispersed in the cleaning fluid, which serves as a reference point for detecting the dirtiness of the cleaning fluid. The drainage device is located at the bottom of the side wall of the cylinder cavity to control the discharge of the cleaning fluid inside the cylinder; The controller is located on the outer wall of the cylinder body and is electrically connected to the detection device; The cleaning method includes the following steps: a. First, the lifting platform (2) moves upward to a position level with the top of the cylinder (1), then hoists the mold to be cleaned and fixes it on the lifting platform (2); b. Then lower the lifting platform (2) and completely house the mold at the bottom of the inner cavity of the cylinder (1). The mold detection device (401) emits an infrared beam to scan the surface of the mold. The controller (6) identifies and matches the corresponding mold based on the infrared signal reflected by the surface structure characteristics of the mold, and retrieves the reference point position information of the corresponding mold's cleaning fluid detection device (402). The corresponding cleaning fluid detection device (402) is calculated and matched as a real-time reference point based on the existing position of the mold in the cylinder. The cleaning fluid dirtiness detected at the reference point indicates whether the cleaning fluid needs to be replaced. c. Then, turn off the drainage device (5), add cleaning fluid until it covers the mold, and start the ultrasonic cleaning device (3) to clean the mold; d. During ultrasonic cleaning, the cleaning fluid detection device (402) at the corresponding reference point detects the turbidity of the surrounding cleaning fluid at certain intervals. The controller (6) compares the detection value at the reference point with the preset standard value. When the detection value meets the standard, it instructs to open the drainage device (5) to replace the cleaning fluid. e. When the dirt level of the cleaning fluid at the corresponding reference point no longer increases dynamically and decreases to the same level as the dirt level of the cleaning fluid at other detection points, the mold cleaning is complete. In step b, the cleaning fluid detection device (402) that first reaches the cleaning fluid failure level among all cleaning fluid detection positions is used as a reference point. When the cleaning fluid reaches the failure level at this point, the cleaning fluid is replaced; or the cleaning fluid detection device (402) that last reaches the cleaning fluid failure level among all cleaning fluid detection positions is used as a reference point. When the cleaning fluid reaches the failure level at this point, the cleaning fluid is replaced.

[0007] As a further improvement of the present invention, the mold detection device is fixedly installed at the middle of the upper opening of the cylinder, and can continuously emit a mesh infrared beam into the cylinder and receive the infrared pattern characteristics reflected by different surfaces of the mold.

[0008] As a further improvement of the present invention, the cleaning fluid detection device can emit a specific wavelength light beam into the cleaning fluid and detect the degree of attenuation of the light beam after it interacts with dirt in the water.

[0009] As a further improvement of the present invention, the bottom surface of the inner cavity of the cylinder is provided with a slope, which slopes towards the drainage device and gradually decreases in height.

[0010] As a further improvement of the present invention, the drainage device includes a drainage groove, a drainage baffle, and a drainage pipe. The drainage groove is located at the junction of the lower slope side of the cylinder bottom surface and the side wall. A movable drainage baffle is embedded in the groove and performs limited translational movement within the groove under the drive of a cylinder. The drainage baffle has a row of horizontal through holes, and the cylinder side wall at the embedding location has a corresponding row of horizontal through holes. During cleaning, the through holes of the drainage baffle and the through holes of the cylinder side wall are misaligned and not connected. During drainage, the drainage baffle moves horizontally, and its through holes align and connect with the through holes of the cylinder side wall. A horizontally positioned drainage pipe is installed behind the through holes of the cylinder side wall, and the lumen of the drainage pipe is connected to the through holes of the cylinder side wall.

[0011] As a further improvement of the present invention, a mixing tank is connected after the drain pipe. The mixing tank is equipped with stirring blades to stir and mix the dirt in the drain pipe cleaning fluid. A cleaning fluid detection device is installed at the outlet of the mixing tank and is electrically connected to the controller.

[0012] As a further improvement of the present invention, it also includes a step of re-inspecting the dirtiness of the cleaning fluid. Part of the cleaning fluid is discharged into a stirring tank, the stirring tank stirs and mixes the dirt in the cleaning fluid, and the dirtiness is re-inspected by a cleaning fluid detection device. The controller compares the re-inspection value with the reference point detection value to obtain a more accurate dirtiness of the cleaning fluid.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The ultrasonic cleaning unit can efficiently clean the dirty areas of the mold without damaging its precision.

[0014] The detection device and controller enable automatic identification of molds and real-time monitoring of mold cleaning levels, greatly improving the automation level of mold cleaning.

[0015] Different technical effects can be achieved by selecting different reference points for the dirtiness of the cleaning fluid. When the cleaning fluid detection device that first reaches the dirtiness level of the cleaning fluid failure among all detection points is selected as the reference point, the cleaning fluid can always maintain the best cleaning effect. When the cleaning fluid detection device that last reaches the dirtiness level of the cleaning fluid failure among all detection points is selected as the reference point, the cleaning fluid can be fully utilized, reducing waste and having the advantages of economy and environmental protection.

[0016] By using a mixing tank to thoroughly mix the cleaning solution before testing, the degree of dirtiness in the cleaning solution can be obtained more accurately, ensuring the accuracy of the cleaning solution test. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation of the detection device of the present invention; Figure 3 This is a cross-sectional view of the cylinder block of the present invention; Figure 4 This is a schematic diagram of the drainage device of the present invention; Figure 5 This is a schematic diagram showing the state of the drainage block blocking the drainage hole according to the present invention; Figure 6 This is a schematic diagram showing the state of the drainage block connected to the drainage hole according to the present invention; Figure 7 This is a schematic diagram of the mixing tank of the present invention; Explanation of the labels in the diagram: 1. Cylinder body; 2. Lifting platform; 3. Ultrasonic cleaning device; 4. Detection device; 5. Drainage device; 6. Controller; 7. Mixing tank; 101. Inclined ramp; 401. Mold detection device; 402. Cleaning fluid detection device; 501. Drainage trough; 502. Drainage baffle; 503. Drainage pipe. Detailed Implementation

[0018] Specific Implementation Example 1: Please refer to the appendix Figure 1 -Appendix Figure 7 , An ultrasonic cleaning device for aircraft molds includes a cylinder 1, a lifting platform 2, an ultrasonic cleaning device 3, a detection device 4, a drainage device 5, and a controller 6.

[0019] The cylinder 1 is a rectangular hollow cylinder with an open top. A lifting platform 2, consisting of four intersecting beams arranged in pairs, is located at the bottom of the inner cavity of the cylinder 1 and is driven by four lifting rods to lift and lower vertically. Ten sets of ultrasonic cleaning devices 3 are embedded in the inner wall of the cylinder 1. Each set of ultrasonic cleaning devices 3 has 40 ceramic piezoelectric crystal ultrasonic generators that are in direct contact with the cleaning fluid inside the cylinder 1. The ceramic piezoelectric crystal ultrasonic generators vibrate when energized to generate cavitation in the cleaning fluid, thus cleaning the mold. Heating tubes for heating are installed on the inner wall of the cylinder 1. The heating tubes are spaced apart between the sets of ultrasonic cleaning devices 3 on the cylinder wall, allowing for temperature control of the cleaning fluid to meet relevant cleaning process requirements.

[0020] The detection device 4 includes a mold detection device 401 and a cleaning fluid detection device 402, both of which are electrically connected to the controller.

[0021] The mold detection device 401 is an infrared transmitter and receiver, fixedly installed in the middle of the upper opening of the cylinder 1. It can continuously emit a mesh-like infrared beam towards the mold inside the cylinder 1 and receive the infrared signal characteristics reflected from different surfaces of the mold. The controller 6 processes the infrared signals reflected from the surface structure features of the mold received by the infrared transmitter and receiver to identify and match the corresponding mold and retrieve the reference point position information of the corresponding mold's cleaning fluid detection device 402. It calculates and matches the corresponding cleaning fluid detection device 402 as a real-time reference point based on the current position of the mold in the cylinder, and indicates whether the cleaning fluid needs to be replaced based on the level of dirt in the cleaning fluid detected at the reference point. The cleaning fluid detection device 402 consists of two sets, located at the upper and lower parts of the tank respectively. Each set includes several water quality optical detectors, evenly distributed around the inner wall of the tank 1. The water quality optical detectors emit a specific wavelength light beam into the cleaning fluid and detect the attenuation caused by the interaction of the light beam with contaminants in the water; the higher the degree of contamination, the greater the attenuation. The controller 6 calculates the degree of contamination in the cleaning fluid by detecting the different degrees of attenuation of the light beam.

[0022] The bottom surface of cylinder 1 has a ramp 101, and a drainage groove 501 is formed at the bottom edge. The slope of ramp 101 slopes towards the drainage groove 501 and gradually decreases in height to guide drainage. The drainage groove 501 has a row of evenly spaced through holes on the outer side of the cylinder wall for drainage. These holes are sealed by drainage blocks 502 embedded within the groove. The drainage blocks 502 have transverse through holes at the same intervals as the drainage groove 501, allowing them to move horizontally along the groove. When the transverse holes of the two are aligned, drainage is connected; when the transverse holes are misaligned, drainage is stopped. The transverse holes of the drainage groove 501 penetrate the side wall and connect to a drainage pipe 503 on the outer side of the cylinder wall. The drainage groove 501, drainage blocks 502, and drainage pipe 503 together form a drainage device 5. The drainage blocks 502 are driven horizontally by a cylinder.

[0023] Cleaning method: a. First, the lifting platform 2 moves upward to a position flush with the top of the cylinder 1, then hoists the mold to be cleaned and fixes it on the lifting platform 2. b. Then lower the lifting platform 2 to completely house the mold at the bottom of the inner cavity of the cylinder 1. The infrared receiver emits an infrared beam to scan the surface of the mold. The controller 6 processes the infrared signal reflected from the surface structure features of the mold received by the infrared receiver to identify and match the corresponding mold and retrieve the reference point position information of the water quality optical detector of the corresponding mold. The controller calculates and matches the corresponding water quality optical detector as a real-time reference point based on the current position of the mold in the cylinder. The controller indicates whether the cleaning fluid needs to be replaced based on the dirtiness of the cleaning fluid detected at the reference point. c. Then, close the drainage device 5, add cleaning fluid until it covers the mold, and start the ceramic piezoelectric crystal ultrasonic generator to generate cavitation in the cleaning fluid to clean the mold. d. During ultrasonic cleaning, the water quality optical detector at the corresponding reference point detects the turbidity of the surrounding cleaning fluid every 1 minute. The controller 6 compares the detection value at the reference point with the preset standard value. When the detection value meets the standard, it instructs the drain device 5 to be opened to replace the cleaning fluid. e. When the dirt level of the cleaning fluid at the corresponding reference point no longer increases dynamically and decreases to the same level as the dirt level of the cleaning fluid at other detection points, the mold cleaning is complete.

[0024] The principle behind selecting the reference point for cleaning fluid dirt level: To ensure the best cleaning effect of the cleaning fluid, the water quality optical detector that first reaches the cleaning fluid failure level among all cleaning fluid detection locations is used as the reference point. When the cleaning fluid reaches the failure level at this point, the cleaning fluid is replaced, which ensures that all cleaning fluid in the tank always has cleaning power.

[0025] Alternatively, to ensure the economic efficiency and environmental friendliness of the cleaning process, the water quality optical detector that last reaches the cleaning fluid's failure level of dirt at all cleaning fluid detection points can be used as a reference point. When the cleaning fluid reaches the failure level of dirt at this point, the cleaning fluid should be replaced. This ensures that the cleaning fluid in the tank is fully utilized and is only replaced after it has completely lost its cleaning power.

[0026] Specific Embodiment Two: Based on Specific Embodiment One, a mixing tank 7 is added after the drain pipe 503. The mixing tank 7 has a stirring blade at its center, which is driven to rotate by a motor. A water quality optical detector is installed at the outlet of the mixing tank 7. When selecting the detection mode that fully utilizes the cleaning fluid, in order to ensure accurate detection of the dirtiness of the cleaning fluid, a portion of the cleaning fluid is introduced from the drain pipe 503 into the mixing tank 7. The cleaning fluid is stirred and mixed by the stirring blade, and then the dirtiness of the mixed cleaning fluid is re-inspected by the water quality optical detector at the outlet of the mixing tank to obtain a more accurate detection value. The controller 6 compares the re-inspection value with the reference point detection value to ensure that the cleaning fluid is completely ineffective before replacement.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All variations, modifications, and substitutions within the spirit and principle of this design are within the protection scope of the present invention.

Claims

1. A cleaning method for an ultrasonic cleaning device for aircraft molds, characterized in that: The ultrasonic cleaning device for aircraft molds includes a cylinder (1), a lifting platform (2), an ultrasonic cleaning device (3), a detection device (4), a drainage device (5), and a controller (6). The cylinder body (1) has an opening at the top, and a lifting platform (2) for lifting molds is movably installed at the bottom of the cylinder. Several ultrasonic cleaning devices (3) are embedded around the inner cavity of the cylinder (1) and are in direct contact with the cleaning fluid. The detection device (4) includes a mold detection device (401) and a cleaning fluid detection device (402); the mold detection device (401) is located at the cylinder opening and scans and identifies the mold when it is hoisted. Several cleaning fluid detection devices (402) are installed on the inner wall of the cylinder (1). When the mold is cleaned, they directly contact the cleaning fluid and detect the concentration of dirt dispersed in the cleaning fluid at equal time intervals, which serves as a reference point for detecting the dirtiness of the cleaning fluid. The drainage device (5) is located at the bottom of the side wall of the inner cavity of the cylinder (1) to control the discharge of the cleaning liquid in the cylinder; The controller (6) is located on the outer wall of the cylinder (1) and is electrically connected to the detection device (4); The cleaning method includes the following steps: a. First, the lifting platform (2) moves upward to a position level with the top of the cylinder (1), then hoists the mold to be cleaned and fixes it on the lifting platform (2); b. Then lower the lifting platform (2) and completely house the mold at the bottom of the inner cavity of the cylinder (1). The mold detection device (401) emits an infrared beam to scan the surface of the mold. The controller (6) identifies and matches the corresponding mold based on the infrared signal reflected by the surface structure characteristics of the mold, and retrieves the reference point position information of the corresponding mold's cleaning fluid detection device (402). The corresponding cleaning fluid detection device (402) is calculated and matched as a real-time reference point based on the existing position of the mold in the cylinder. The cleaning fluid dirtiness detected at the reference point indicates whether the cleaning fluid needs to be replaced. c. Then, turn off the drainage device (5), add cleaning fluid until it covers the mold, and start the ultrasonic cleaning device (3) to clean the mold; d. During ultrasonic cleaning, the cleaning fluid detection device (402) at the corresponding reference point detects the turbidity of the surrounding cleaning fluid at certain intervals. The controller (6) compares the detection value at the reference point with the preset standard value. When the detection value meets the standard, it instructs to open the drainage device (5) to replace the cleaning fluid. e. When the dirt level of the cleaning fluid at the corresponding reference point no longer increases dynamically and decreases to the same level as the dirt level of the cleaning fluid at other detection points, the mold cleaning is complete. In step b, the cleaning fluid detection device (402) that first reaches the cleaning fluid failure level among all cleaning fluid detection positions is used as a reference point. When the cleaning fluid reaches the failure level at this point, the cleaning fluid is replaced; or the cleaning fluid detection device (402) that last reaches the cleaning fluid failure level among all cleaning fluid detection positions is used as a reference point. When the cleaning fluid reaches the failure level at this point, the cleaning fluid is replaced.

2. The cleaning method of the ultrasonic cleaning device for aircraft molds according to claim 1, characterized in that: The mold detection device (401) is fixedly installed at the middle of the upper opening of the cylinder (1), and can continuously emit a mesh infrared beam toward the mold inside the cylinder (1) and receive the infrared pattern characteristics reflected by different surfaces of the mold.

3. The cleaning method of the ultrasonic cleaning device for aircraft molds according to claim 1, characterized in that: The cleaning fluid detection device (402) can emit a specific wavelength beam into the cleaning fluid and detect the degree of attenuation of the beam after it interacts with dirt in the water.

4. The cleaning method of the ultrasonic cleaning device for aircraft molds according to claim 1, characterized in that: The bottom surface of the inner cavity of the cylinder (1) is provided with a slope (101), which slopes towards the drainage device (5) and gradually becomes lower.

5. The cleaning method of the ultrasonic cleaning device for aircraft molds according to claim 4, characterized in that: The drainage device (5) includes a drainage channel (501), a drainage baffle (502), and a drainage pipe (503). A drainage groove (501) is located at the junction of the lower slope side of the bottom surface of the cylinder (1) and the side wall. A movable drainage baffle (502) is embedded in the groove and moves in a limited direction under the drive of the cylinder. The drainage baffle (502) has a row of horizontal through holes, and the side wall of the cylinder (1) where it is embedded has a row of corresponding horizontal through holes. During cleaning, the through holes of the drainage baffle (502) and the through holes of the side wall of the cylinder (1) are misaligned and do not communicate with each other. During drainage, the drainage baffle (502) moves horizontally and the through holes of the drainage baffle (502) are aligned and connected with the through holes of the side wall of the cylinder (1). A horizontally arranged drainage pipe (503) is provided behind the through hole of the side wall of the cylinder (1), and the cavity of the drainage pipe (503) is connected to the through hole of the side wall of the cylinder (1).

6. The cleaning method of the ultrasonic cleaning device for aircraft molds according to claim 5, characterized in that: A mixing tank (7) is connected to the drain pipe (503). The mixing tank (7) is equipped with stirring blades, which can stir and mix the dirt in the cleaning liquid of the drain pipe (503). A cleaning liquid detection device (402) is installed at the outlet of the mixing tank (7) and is electrically connected to the controller (6).

7. The cleaning method of the ultrasonic cleaning device for aircraft molds according to claim 6, characterized in that, It also includes a re-inspection step of the cleaning fluid dirtiness. Part of the cleaning fluid is discharged into the mixing tank (7). The mixing tank (7) mixes the dirt in the cleaning fluid and re-inspects the dirtiness through the cleaning fluid detection device (402). The controller (6) compares the re-inspection value with the reference point detection value to obtain a more accurate cleaning fluid dirtiness.

Images