Multi-groove combined ultrasonic cleaning method

Abstract

The invention relates to the technical field of multi-groove cleaning, in particular to a multi-groove combined ultrasonic cleaning method, a combined cleaning groove is formed by a cleaning groove, a liquid cutting groove, a through type liquid cutting channel and a through type drying channel, and a feeding door and a discharging door are arranged at the two ends of the front face of the combined cleaning groove respectively. The first cleaning tank, the second cleaning tank and the third cleaning tank are respectively connected with the first cleaning fluid circulating tank, the second cleaning fluid circulating tank and the third cleaning fluid circulating tank through overflow pipes and cleaning fluid circulating pipes, the overflow pipes and the cleaning fluid circulating pipes are provided with valves, and the cleaning fluid circulating pipes are also provided with oil-water separators. The multiple functional grooves are integrated and combined, the mother frame assembly is designed to sequentially penetrate through all the grooves along the annular guide rail, and continuous and automatic conveying of objects to be washed in a closed system is achieved. According to the method, the liquid dropping link of the workpiece in the transferring process is thoroughly avoided, the continuity and efficiency of the whole cleaning process are remarkably improved, and the working environment quality is improved.

Description

Technical Field

[0001] This invention relates to the field of multi-tank cleaning technology, and more particularly to a multi-tank combined ultrasonic cleaning method. Background Technology

[0002] In the industrial manufacturing sector, ultrasonic cleaning technology is widely used due to its advantages such as thorough cleaning and high efficiency. For precision parts requiring high cleanliness, a single ultrasonic cleaning tank is often insufficient to meet the process requirements. Therefore, a multi-tank series cleaning method is often used to complete a series of processes from rough cleaning to fine cleaning, rinsing, and drying.

[0003] Existing multi-tank ultrasonic cleaning equipment typically consists of multiple independent cleaning tanks arranged in a row, requiring operators to manually or semi-automatically transfer workpieces between tanks using baskets or transport devices. This transfer method has the following inherent drawbacks: First, the transfer path between tanks is long and cumbersome, resulting in a long cleaning cycle and low efficiency. Second, during the transfer and lifting process, the cleaning fluid adhering to the workpiece surface drips onto the ground, creating a harsh working environment. Furthermore, existing equipment often uses independent circulation for cleaning fluid management, leading to high consumption of fresh cleaning fluid, high operating costs, and a lack of integrated automatic monitoring and adjustment of liquid level, temperature, and concentration, making it difficult to ensure the stability and consistency of the cleaning process.

[0004] Therefore, there is an urgent need for an automated ultrasonic cleaning solution that can achieve seamless, closed-loop transfer of workpieces between multiple tanks and can efficiently manage and precisely control the cleaning fluid, so as to fundamentally solve the core problems of low cleaning efficiency, serious cross-contamination, and inaccurate process control. Summary of the Invention

[0005] The main objective of this invention is to provide a multi-tank combined ultrasonic cleaning method to solve the problems raised in related technologies.

[0006] To achieve the above objectives, according to one aspect of the present invention, a multi-tank combined ultrasonic cleaning method is provided, comprising the following steps: S1: Place the items to be washed in the matching sub-frame, open the feed door, insert the sub-frame into the main frame body through the door opening of the main frame, and close the feed door; S2: Lower the mother frame assembly onto the bottom guide rail, immerse the items to be washed inside the mother frame assembly in the cleaning solution in the first cleaning tank, and start the ultrasonic generator in the first cleaning tank through the operation screen to clean the items to be washed. S3: After cleaning is completed in the first cleaning tank, move the mother frame assembly to the second cleaning tank, raise the mother frame assembly so that its bottom is higher than the partition between the first and second cleaning tanks, continue to move the mother frame assembly forward into the second cleaning tank, lower the mother frame assembly, immerse the items to be washed in the cleaning solution in the second cleaning tank, and start the ultrasonic generator in the second cleaning tank to clean the items to be washed. S4: After cleaning is completed in the second cleaning tank, the mother frame assembly is moved to the third cleaning tank for cleaning in accordance with the method in step S3. S5: After cleaning is completed in the third cleaning tank, the mother frame assembly is moved to the fourth cleaning tank for cleaning in accordance with the method in step S3. S6: After cleaning is completed in the fourth cleaning tank, the mother frame assembly is moved to the fifth cleaning tank for cleaning in accordance with the method in step S3. S7: After cleaning is completed in the fifth cleaning tank, the mother frame assembly is moved to the sixth cleaning tank for cleaning in accordance with the method in step S3. S8: After cleaning is completed in the sixth cleaning tank, the mother frame assembly is moved to the seventh cleaning tank for cleaning in accordance with the method in step S3. S9: After cleaning is completed in the seventh cleaning tank, the mother frame assembly is moved to the cutting liquid tank for air cutting according to the method in step S3; S10: After completing the air cutting in the cutting tank, the mother frame assembly is moved to the through-type cutting channel for secondary air cutting according to the method in step S3. S11: After the secondary air cutting is completed in the through-type liquid cutting channel, the mother frame assembly is moved to the through-type drying channel for drying according to the method in step S3. S12: After drying is complete, open the discharge door and take out the sub-frame containing the items to be washed from the mother frame door opening. The mother frame assembly returns to the first washing tank along the annular bottom guide rail and is put into use again.

[0007] Furthermore, in step S2, the temperature range of the cleaning fluid in the first cleaning tank, the second cleaning tank, and the third cleaning tank is all from room temperature to 90 degrees Celsius. When the temperature of the cleaning fluid in the cleaning tank exceeds the set upper and lower limits, the alarm interface on the operation screen displays warning content and emits a roaring sound.

[0008] Furthermore, in steps S2 and S5, the first cleaning tank is replenished with cleaning fluid by the first cleaning fluid circulation tank, and the cleaning fluid in the first cleaning tank can overflow back to the first cleaning fluid circulation tank; the cleaning fluid in the fourth cleaning tank can overflow back to the first cleaning tank.

[0009] Furthermore, in step S3, the second cleaning tank is replenished with cleaning fluid by the second cleaning fluid circulation tank, and the cleaning fluid in the second cleaning tank can overflow back to the second cleaning fluid circulation tank, while the cleaning fluid in the third cleaning tank can overflow into the second cleaning tank.

[0010] Furthermore, in step S4, the third cleaning tank is replenished with cleaning fluid by the third cleaning fluid circulation tank, and the cleaning fluid in the third cleaning tank can overflow back to the third cleaning fluid circulation tank.

[0011] Furthermore, in steps S5 to S9, the cleaning fluid in the seventh cleaning tank overflows into the sixth cleaning tank, the cleaning fluid in the sixth cleaning tank overflows into the fifth cleaning tank, and the cleaning fluid in the fifth cleaning tank overflows into the fourth cleaning tank.

[0012] Furthermore, the cleaning tank, the liquid cutting tank, the through-type liquid cutting channel, and the through-type drying channel constitute a combined cleaning tank, and the front ends of the combined cleaning tank are respectively provided with a feed door and a discharge door.

[0013] Furthermore, the first cleaning tank, the second cleaning tank, and the third cleaning tank are respectively connected to the first cleaning fluid circulation tank, the second cleaning fluid circulation tank, and the third cleaning fluid circulation tank through overflow pipes and cleaning fluid circulation pipes. Valves are provided on both the overflow pipes and the cleaning fluid circulation pipes, and an oil-water separator is also provided on the cleaning fluid circulation pipes.

[0014] Furthermore, the cleaning tank is connected to a pure water tank via a water supply pipe, and the pure water tank replenishes the cleaning tank with pure water. A valve is installed at each point where the water supply pipe enters the cleaning tank.

[0015] Furthermore, the mother frame assembly includes a mother frame body, on which a mother frame door opening is provided. Threaded rods and several guide rods are provided on opposite sides of the mother frame body. The threaded rods are all threadedly connected to the mother frame body, and the guide rods are all slidably connected to the mother frame body.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This application integrates multiple functional slots and designs a mother frame assembly that sequentially passes through each slot along a circular guide rail, achieving continuous and automated transfer of items to be washed within a closed system. This method completely avoids dripping during the transfer process, significantly improving the continuity and efficiency of the entire cleaning process and enhancing the quality of the working environment.

[0017] 2. This application establishes an intelligent cleaning fluid management system by defining the overflow and replenishment relationships between the cleaning tank and the circulation tank, as well as the replenishment relationships between different functional tanks. This system, in conjunction with the coordinated operation of concentration sensors, level sensors, heaters, and valves, automatically maintains the concentration, level, and temperature of the cleaning fluid in each tank within the process settings, ensuring the stability and consistency of the cleaning effect. Simultaneously, replenishment is made from the next functional tank containing a cleaner solution to the previous functional tank containing a more turbid solution, achieving tiered utilization of the cleaning fluid. This effectively reduces the consumption of fresh cleaning fluid and pure water, lowering operating costs. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of the multi-tank combined ultrasonic cleaning method of the present invention; Figure 2 This is a schematic diagram of the internal structure of the combined cleaning tank in the multi-tank combined ultrasonic cleaning method of the present invention; Figure 3 This is a plan view of the multi-tank combined ultrasonic cleaning method of the present invention; Figure 4 This is a partially enlarged schematic diagram of the multi-tank combined ultrasonic cleaning method of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the main frame component structure of the multi-tank combined ultrasonic cleaning method of the present invention; Figure 6 This is a schematic diagram showing the distribution of the mother frame assembly on the top guide rail in the multi-tank combined ultrasonic cleaning method of the present invention. Figure 7 This is a partially enlarged schematic diagram of the multi-tank combined ultrasonic cleaning method of the present invention. Figure 2 ; Figure label: 1. Combined cleaning tank; 11. First cleaning tank; 12. Second cleaning tank; 13. Third cleaning tank; 14. Fourth cleaning tank; 15. Fifth cleaning tank; 16. Sixth cleaning tank; 17. Seventh cleaning tank; 18. Liquid cutting tank; 19. Through-type liquid cutting channel; 10. Through-type drying channel; 101. First drying channel; 102. Second drying channel; 103. Third drying channel; 104. Automatic lifting door; 2. Pure water tank; 3. Cleaning fluid storage tank; 4. First cleaning fluid circulation tank. 5. Second cleaning fluid circulation tank; 6. Third cleaning fluid circulation tank; 7. Feed door; 8. Discharge door; 9. Mother frame assembly; 91. Mother frame body; 92. Mother frame doorway; 93. Guide rod; 94. Threaded rod; 95. Slider; 96. Connecting block; 97. Motor; 98. Slot; 20. Bottom guide rail; 21. Overflow pipe; 22. Cleaning fluid circulation pipe; 23. Connecting pipe; 24. Valve; 25. Oil-water separator; 26. Water replenishment pipe; 27. Liquid replenishment pipe; 28. Top guide rail. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] This embodiment provides a multi-tank combined ultrasonic cleaning method, such as... Figure 1 and Figure 2As shown, the system includes a combined cleaning tank 1. The front of the combined cleaning tank 1 has an inlet gate 7 and an outlet gate 8 at both ends. Inside the combined cleaning tank 1, along the material travel direction, are arranged the following components in sequence: a first cleaning tank 11, a second cleaning tank 12, a third cleaning tank 13, a fourth cleaning tank 14, a fifth cleaning tank 15, a sixth cleaning tank 16, a seventh cleaning tank 17, a liquid cutting tank 18, a through-flow liquid cutting channel 19, and a through-flow drying channel 10. These functional units together form a complete cleaning, liquid cutting, and drying production line. The through-flow liquid cutting channel 19 and the through-flow drying channel 10 are both 3.5 meters long to ensure sufficient processing time. Multiple bottom guide rails 20 are fixedly installed on the bottom surface of the combined cleaning tank 1. These bottom guide rails 20 are distributed within each functional tank, and together they form two annular conveying paths, stably supporting the mother frame assembly 9. The top surface of the bottom guide rails 20 can be equipped with rollers or chains or other transmission mechanisms for supporting and conveying the mother frame assembly 9.

[0021] In this embodiment, the dimensions of each cleaning tank and the liquid cutting tank 18 are 650mm long * 650mm wide * 1100mm high, and the length of the through-type liquid cutting channel 19 and the through-type drying channel 10 are both 3.5 meters. Overflow channels are provided on the side walls between the second cleaning tank 12 and the third cleaning tank 13, as well as on the side walls between the fourth cleaning tank 14, the fifth cleaning tank 15, the sixth cleaning tank 16, and the seventh cleaning tank 17. Each overflow channel is equipped with a valve. By controlling the valve, it is possible to select whether to replenish the liquid from the next level cleaning tank, thereby reducing the amount of fresh cleaning liquid to be replenished.

[0022] The first cleaning tank 11, the second cleaning tank 12, and the third cleaning tank 13 contain cleaning fluid and water, and are equipped with ultrasonic generators for cleaning using both the cleaning fluid and ultrasonic waves. The fourth cleaning tank 14 contains pure water and is equipped with an air drum for cleaning using both water and the air drum. The fifth cleaning tank 15, the sixth cleaning tank 16, and the seventh cleaning tank 17 contain pure water and are equipped with ultrasonic generators for cleaning using both water and ultrasonic waves. A vortex fan is installed in the liquid cutting tank 18. The vortex fan generates a high-pressure airflow that acts on the product surface. The impact force of the airflow breaks through the adhesion between the liquid and the product surface, blowing away any residual liquid and preventing water stains or marks from forming on the product surface, ensuring that the product has no appearance defects after subsequent drying. The through-flow liquid cutting channel 19 is equipped with two sets of vortex fans for air cutting. One set of fans is equipped with a heating box with a heating temperature set from room temperature to 90℃, while the other set of fans does not have a heating function. To prevent heat loss, automatic lifting doors are installed at the inlet and outlet of the through-flow liquid cutting channel 19. The through-type drying tunnel 10 is equipped with two automatic lifting doors 104, dividing the through-type drying tunnel 10 into three parts: the first drying tunnel 101, the second drying tunnel 102, and the third drying tunnel 103. Each drying tunnel is equipped with a heater, and the heating is stably set to room temperature to 130℃. After the temperature is set, the actual temperature inside the through-type drying tunnel 10 is detected from time to time. If there is a deviation, it needs to be corrected. If the temperature exceeds the set temperature, the alarm interface of the operation screen displays the alarm content and emits a roaring sound. The third drying tunnel 103 is connected to the discharge door 8, and the dried material can be directly removed.

[0023] The items to be washed are held by a set of mother frame components 9. For example... Figure 5 As shown, the mother frame assembly 9 mainly includes a mother frame body 91, which has a mother frame doorway 92 for inserting and removing the sub-frame containing items to be washed. On opposite sides of the mother frame body 91, two guide rods 93 and threaded rods 94 are provided. The guide rods 93 are slidably connected to the mother frame body 91, serving a guiding and stabilizing function. The threaded rods 94 are threadedly connected to the mother frame body 91. To drive the lifting and horizontal movement of the mother frame assembly 9, two annular top guide rails 28 are fixedly installed on the inner top surface of the combined washing tank 1. The tops of the guide rods 93 and threaded rods 94 are connected to sliding mechanisms, which cooperate with the top guide rails 28 and can move along them. The sliding mechanism includes two parallel sliding blocks 95, each with a slot 98 at its top, into which the top guide rails 28 are engaged. Figure 7 As shown, to prevent the top guide rail 28 from dislodging from the slot 98, both are designed with a T-shaped cross-section, such as... Figure 7As shown, the slider 95 is engaged with the top guide rail 28 via the slot 98. A motor-driven roller is installed inside the slider 95. When the roller rotates, it drives the entire slider 95 and the connected mother frame assembly 9 to move horizontally along the top guide rail 28. Two guide rods 93 located on the same straight line are fixedly connected to the same slider 95. Two connecting blocks 96 are fixedly arranged between the two guide rods 93, and a motor 97 is fixedly installed on the connecting blocks 96. The output shaft of the motor 97 rotates through the connecting blocks 96 and is fixedly connected to the top end of the threaded rod 94. When the motor 97 starts, it drives the threaded rod 94 to rotate. Since the mother frame body 91 and the threaded rod 94 are threadedly engaged and the rotation is restricted by the guide rods 93, the vertical lifting and lowering movement of the mother frame body 91 can be achieved.

[0024] The partition between each functional slot is lower than the height of the functional slot, which allows different cleaning solutions to be stored below each functional slot, while the upper part is connected to allow the mother frame assembly 9 to pass between each functional slot.

[0025] To ensure that each functional slot contains a mother frame assembly 9, thereby improving cleaning efficiency, multiple mother frame assemblies 9 are arranged on the top guide rail 28. Before cleaning begins, all mother frame assemblies 9 are on the same side of the top guide rail 28, and the bottom of each mother frame assembly 9 is higher than the top of the partition between adjacent functional slots, ensuring smooth movement of the mother frame assemblies 9. When cleaning begins, the mother frame assembly 9 closest to the first cleaning slot 11 moves into the first cleaning slot 11, while the other mother frame assemblies 9 remain on the top guide rail 28 on the other side. Figure 6 As shown.

[0026] The cleaning fluid supply and circulation system is divided into two parts. Each of the first three main cleaning tanks is connected to an independent cleaning fluid circulation tank. For example... Figure 3 and Figure 4 As shown, the first cleaning tank 11 is connected to the first cleaning fluid circulation tank 4 via an overflow pipe 21 and a cleaning fluid circulation pipe 22; the second cleaning tank 12 is connected to the second cleaning fluid circulation tank 5 in the same way; and the third cleaning tank 13 is connected to the third cleaning fluid circulation tank 6. Valves 24 are installed on both the overflow pipe 21 and the cleaning fluid circulation pipe 22 to control the flow of fluid. An oil-water separator 25 is also connected in series on the cleaning fluid circulation pipe 22 to separate and remove oil from the cleaning fluid, extending its service life. The first cleaning fluid circulation tank 4, the second cleaning fluid circulation tank 5, and the third cleaning fluid circulation tank 6 are all replenished with raw liquid from a centralized cleaning fluid storage tank 3 via a replenishment pipe 27. A valve is installed at the end of the replenishment pipe 27 that extends into each circulation tank.

[0027] For the fourth to seventh cleaning tanks 14, their main function is rinsing, so pure water is supplied to them from the pure water tank 2 through the water supply pipe 26. A valve 24 is also provided at the point where the water supply pipe 26 enters each cleaning tank.

[0028] To achieve tiered utilization of the cleaning solution and conserve resources, a specific overflow relationship is established between the tanks. A connecting pipe 23 is provided between the fourth cleaning tank 14 and the first cleaning tank 11. The connecting pipe 23 is equipped with a valve 24 and an oil-water separator 25, allowing liquid in the fourth cleaning tank 14 to overflow back to the first cleaning tank 11 through the connecting pipe 23. Overflow channels are provided on the side walls between the second and third cleaning tanks 12 and 13, as well as on the side walls between the fourth, fifth, sixth, and seventh cleaning tanks 14 and 17. Each overflow channel is equipped with a valve. By controlling these valves, for example, liquid from the third cleaning tank 13 can overflow to the second cleaning tank 12, or liquid from the seventh cleaning tank 17 can overflow to the sixth cleaning tank 16, liquid from the sixth cleaning tank 16 can overflow to the fifth cleaning tank 15, and liquid from the fifth cleaning tank 15 can overflow to the fourth cleaning tank 14. This design allows cleaner subsequent tank solutions to be replenished to the preceding process, reducing the amount of fresh cleaning solution and pure water required for replenishment.

[0029] To ensure the stability of the cleaning process, level sensors and heaters are installed in the first cleaning tank 11, the second cleaning tank 12, and the third cleaning tank 13. The level sensors monitor the liquid level in real time. When the liquid level is below the set value, the system automatically shuts off the heater to prevent dry burning, and the alarm interface on the control panel displays a warning message and emits a humming sound. The heaters can heat the cleaning solution to a range from room temperature to 90 degrees Celsius. The control panel will also alarm when the temperature exceeds the set upper or lower limits. After the temperature is set, it is necessary to periodically verify whether the displayed temperature matches the actual temperature; if a deviation exists, it should be corrected. In addition, concentration sensors are installed in the first cleaning solution circulation tank 4, the second cleaning solution circulation tank 5, and the third cleaning solution circulation tank 6 to detect the concentration of the cleaning solution. A metering pump automatically adds concentrate to adjust the concentration and maintain it within the optimal operating range. The bottom of each cleaning tank is designed to be inclined, and a drain pipe with a valve is installed at the bottom of the incline. This structure facilitates the complete drainage of the cleaning solution in the tank through the drain pipe, making maintenance and solution replacement convenient.

[0030] Based on the above system, the cleaning method of this application includes the following steps: S1: Loading. The operator places the items to be washed in the matching sub-frame, opens the feed door 7, inserts the sub-frame into the mother frame body 91 through the mother frame door opening 92, and then closes the feed door 7.

[0031] S2: First cleaning. Start the system via the control panel to lower the mother frame assembly 9 onto the bottom guide rail 20, ensuring the items to be cleaned inside the mother frame body 91 are completely immersed in the cleaning solution in the first cleaning tank 11. Start the ultrasonic generator in the first cleaning tank 11 for the initial cleaning.

[0032] S3: Transfer to the second cleaning tank. After the first cleaning tank is completed, the mother frame assembly 9 is lifted so that its bottom is higher than the partition between the first cleaning tank 11 and the second cleaning tank 12, then it is moved horizontally above the second cleaning tank 12, and then lowered so that the workpiece is immersed in the cleaning solution of the second cleaning tank 12, and ultrasonic cleaning is started.

[0033] After the mother frame assembly 9 is moved from the first cleaning tank 11 to the second cleaning tank 12, the idle mother frame assembly 9 on the bottom guide rail 20 returns to the first cleaning tank 11. (Refer to...) Figure 6 It can load new sub-frames for a new round of cleaning, and this design allows all functional slots to work synchronously, improving cleaning efficiency.

[0034] S4: Third cleaning tank. After step S3 is completed, the mother frame assembly 9 is moved to the third cleaning tank 13 for cleaning, following the same method as in S3.

[0035] S5: Fourth cleaning tank. After step S4 is completed, the mother frame assembly 9 is moved to the fourth cleaning tank 14 for cleaning, following the same method as in S3.

[0036] S6 to S8: Fifth to seventh cleaning tanks. The mother frame assembly 9 is sequentially moved into the fifth cleaning tank 15, the sixth cleaning tank 16, and the seventh cleaning tank 17 for cleaning. These tanks mainly serve a rinsing function.

[0037] S9: Initial air cutting. After cleaning, the mother frame assembly 9 is moved into the cutting liquid tank 18 for initial air cutting to blow away a large number of residual liquid droplets on the surface of the workpiece.

[0038] S10: Secondary air cutting. Subsequently, the mother frame assembly 9 is moved into the through-type liquid cutting channel 19 for a more thorough secondary air cutting process.

[0039] S11: Drying. After air cutting is completed, the mother frame assembly 9 is moved into the through-type drying tunnel 10 for drying.

[0040] S12: Unloading and Resetting. After drying, open the discharge door 8 and remove the sub-frame containing the cleaned items from the mother frame doorway 92. The empty mother frame assembly 9 then returns to the position of the first cleaning tank 11 along the annular bottom guide rail 20, waiting for the next cycle.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A multi-tank combined ultrasonic cleaning method, characterized in that, Includes the following steps: S1: Place the items to be washed in the matching sub-frame, open the feed door (7), put the sub-frame into the main body of the main frame (91) through the door opening (92) of the main frame, and close the feed door (7). S2: Lower the mother frame assembly (9) onto the bottom guide rail (20) so that the items to be washed in the mother frame assembly (9) are immersed in the cleaning liquid in the first cleaning tank (11). Start the ultrasonic generator in the first cleaning tank (11) through the operation screen to clean the items to be washed. S3: After cleaning is completed in the first cleaning tank (11), move the mother frame assembly (9) to the second cleaning tank (12), raise the mother frame assembly (9) so that its bottom is higher than the partition between the first cleaning tank (11) and the second cleaning tank (12), continue to move the mother frame assembly (9) forward into the second cleaning tank (12), lower the mother frame assembly (9), immerse the items to be washed in the cleaning liquid in the second cleaning tank (12), start the ultrasonic generator in the second cleaning tank (12) to clean the items to be washed; S4: After cleaning is completed in the second cleaning tank (12), the mother frame assembly (9) is moved to the third cleaning tank (13) for cleaning in accordance with the method of step S3; S5: After cleaning is completed in the third cleaning tank (13), the mother frame assembly (9) is moved to the fourth cleaning tank (14) for cleaning in accordance with the method of step S3; S6: After cleaning is completed in the fourth cleaning tank (14), the mother frame assembly (9) is moved to the fifth cleaning tank (15) for cleaning in accordance with the method of step S3; S7: After cleaning is completed in the fifth cleaning tank (15), the mother frame assembly (9) is moved to the sixth cleaning tank (16) for cleaning in accordance with the method of step S3; S8: After cleaning is completed in the sixth cleaning tank (16), the mother frame assembly (9) is moved to the seventh cleaning tank (17) for cleaning in accordance with the method of step S3; S9: After cleaning is completed in the seventh cleaning tank (17), the mother frame assembly (9) is moved to the cutting liquid tank (18) for air cutting according to the method in step S3; S10: After completing the air cutting in the liquid cutting tank (18), the mother frame assembly (9) is moved to the through-type liquid cutting channel (19) for secondary air cutting according to the method of step S3; S11: After the secondary air cutting is completed in the through-type liquid cutting channel (19), the mother frame assembly (9) is moved to the through-type drying channel (10) for drying according to the method of step S3; S12: After drying, open the discharge door (8), take out the sub-frame containing the items to be washed from the mother frame door opening (92), and the mother frame assembly (9) returns to the first cleaning tank (11) along the annular bottom guide rail (20) for reuse.

2. The multi-tank combined ultrasonic cleaning method according to claim 1, characterized in that, In step S2, the temperature range of the cleaning fluid in the first cleaning tank (11), the second cleaning tank (12) and the third cleaning tank (13) is from room temperature to 90 degrees Celsius. When the cleaning fluid in the cleaning tank exceeds the set upper and lower limit temperature, the alarm interface of the operation screen displays the warning content and emits a roaring sound.

3. The multi-tank combined ultrasonic cleaning method according to claim 1, characterized in that, In steps S2 and S5, the first cleaning tank (11) is replenished with cleaning fluid by the first cleaning fluid circulation tank (4), and the cleaning fluid in the first cleaning tank (11) can overflow back to the first cleaning fluid circulation tank (4); the cleaning fluid in the fourth cleaning tank (14) can overflow back to the first cleaning tank (11).

4. The multi-tank combined ultrasonic cleaning method according to claim 1, characterized in that, In step S3, the second cleaning tank (12) is replenished with cleaning fluid by the second cleaning fluid circulation tank (5), and the cleaning fluid in the second cleaning tank (12) can overflow back to the second cleaning fluid circulation tank (5), and the cleaning fluid in the third cleaning tank (13) can overflow into the second cleaning tank (12).

5. The multi-tank combined ultrasonic cleaning method according to claim 1, characterized in that, In step S4, the third cleaning tank (13) is replenished with cleaning fluid by the third cleaning fluid circulation tank (6), and the cleaning fluid in the third cleaning tank (13) can overflow back to the third cleaning fluid circulation tank (6).

6. The multi-tank combined ultrasonic cleaning method according to claim 1, characterized in that, In steps S5 to S9, the cleaning fluid in the seventh cleaning tank (17) overflows into the sixth cleaning tank (16), the cleaning fluid in the sixth cleaning tank (16) overflows into the fifth cleaning tank (15), and the cleaning fluid in the fifth cleaning tank (15) overflows into the fourth cleaning tank (14).

7. The multi-tank combined ultrasonic cleaning method according to claim 1, characterized in that, The cleaning tank (11, 12, 13, 14, 15, 16, 17), the liquid cutting tank (18), the through liquid cutting channel (19) and the through drying channel (10) constitute a combined cleaning tank (1). The combined cleaning tank (1) has an inlet gate (7) and an outlet gate (8) at both ends of its front side.

8. The multi-tank combined ultrasonic cleaning method according to claim 1, characterized in that, The first cleaning tank (11), the second cleaning tank (12), and the third cleaning tank (13) are respectively connected to the first cleaning fluid circulation tank (4), the second cleaning fluid circulation tank (5), and the third cleaning fluid circulation tank (6) through an overflow pipe (21) and a cleaning fluid circulation pipe (22). Both the overflow pipe (21) and the cleaning fluid circulation pipe (22) are equipped with valves (24), and the cleaning fluid circulation pipe (22) is also equipped with an oil-water separator (25).

9. The multi-tank combined ultrasonic cleaning method according to claim 1, characterized in that, The cleaning tanks (14, 15, 16, 17) are connected to a pure water tank (2) via a water supply pipe (26), and the pure water tank (2) supplies pure water to the cleaning tanks (14, 15, 16, 17).

10. The multi-tank combined ultrasonic cleaning method according to claim 1, characterized in that, The mother frame assembly (9) includes a mother frame body (91), on which a mother frame door opening (92) is provided. The mother frame body (91) is provided with threaded rods (94) and several guide rods (93) on opposite sides. The threaded rods (94) are all threadedly connected to the mother frame body (91), and the guide rods (93) are all slidably connected to the mother frame body (91).

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