CN113909210A - Ultrasonic cleaning machine and cleaning method - Google Patents

Abstract

The application relates to an ultrasonic cleaning machine, it includes frame, working bin, ultrasonic wave subassembly, agent wash and supply liquid subassembly, rinsing and supply liquid subassembly and stoving subassembly, working bin and frame fixed connection, the ultrasonic wave subassembly sets up in the lateral wall of working bin. The agent washing liquid supply assembly injects a cleaning agent into the working bin, then the workpiece in the working bin is cleaned by utilizing the cavitation effect of ultrasonic waves, and the cleaning agent is recovered by the agent washing liquid supply assembly; then the rinsing liquid supply component injects clean water into the working bin, then the workpiece in the working bin is rinsed by utilizing the cavitation effect of ultrasonic waves, and the rinsing liquid supply component recovers the rinsed clean water; the drying component sends hot air into the working bin so that the workpiece is dried. The work piece is in the working bin all the time at the whole in-process that washs to rinsing to drying, and need not shift the work piece to the operating position of three different functions to improve work piece abluent efficiency.

Description

Ultrasonic cleaning machine and cleaning method

Technical Field

The application relates to the field of cleaning equipment, in particular to an ultrasonic cleaning machine and a cleaning method.

Background

The SMT steel mesh is a special mould for a Surface Mounting Technology (SMT) steel mesh, and the main function of the SMT steel mesh is to help solder paste to miss printing in the screen printing process of a circuit board, so that an accurate amount of solder paste is accurately transferred to a corresponding position on an empty PCB. With the development of surface mount technology, the precision requirement of the SMT steel mesh is higher and higher. After the SMT steel mesh is used for a period of time, the inner wall of the hole of the SMT steel mesh has the phenomenon of solder paste residue. In order to improve the printing precision and quality of the SMT steel mesh, the residual solder paste on the inner wall surface of the SMT steel mesh needs to be cleaned in time.

Referring to fig. 1, in the related art, the cleaning of the SMT steel mesh is generally performed in an ultrasonic cleaner. The ultrasonic cleaning machine has a cleaning agent tank 1 ', a rinsing tank 2 ' and a drying tank 3 '. The cleaning agent for cleaning the solder paste is arranged in the agent washing tank 1 ', the side walls of the agent washing tank 1 ' and the rinsing tank 2 ' are connected with the ultrasonic component 4 ', the SMT steel mesh is cleaned in the agent washing tank 1 ' through ultrasonic waves, the cleaning agent on the SMT steel mesh is rinsed by using clear water in the rinsing tank 2 ', and then the SMT steel mesh is transferred to the drying tank 3 ' to dry the moisture on the SMT steel mesh, so that the cleaning process is completed.

In view of the above technical means, in the process of cleaning the SMT steel mesh, the cleaning of the SMT steel mesh is generally performed in an ultrasonic cleaning machine. The ultrasonic cleaning machine has a cleaning agent tank 1 ', a rinsing tank 2 ' and a drying tank 3 '. The cleaning agent for cleaning the solder paste is arranged in the agent washing tank 1 ', the side walls of the agent washing tank 1 ' and the rinsing tank 2 ' are connected with the ultrasonic component 4 ', the SMT steel mesh is cleaned in the agent washing tank 1 ' through ultrasonic waves, the cleaning agent on the SMT steel mesh is rinsed by using clear water in the rinsing tank 2 ', and then the SMT steel mesh is transferred to the drying tank 3 ' to dry the moisture on the SMT steel mesh, so that the cleaning process is completed.

To above-mentioned technical means, carrying out abluent in-process to the SMT steel mesh, need shift the SMT steel mesh in three operating position in proper order, there is the lower problem of SMT steel mesh cleaning efficiency.

Disclosure of Invention

In order to improve the cleaning efficiency of the SMT steel mesh, the application provides an ultrasonic cleaning machine and a cleaning method.

In a first aspect, the present application provides an ultrasonic cleaning machine, which adopts the following technical solution.

An ultrasonic cleaning machine comprises a machine frame,

a frame;

the working bin is used for accommodating a workpiece to be cleaned and is fixedly connected with the rack;

the ultrasonic assembly is used for generating ultrasonic waves and is arranged on the outer side wall of the working bin;

the agent washing liquid supply assembly is used for injecting a cleaning agent into the working bin or recovering the cleaning agent from the working bin;

the rinsing liquid supply component is used for injecting water into the working bin or recovering clean water from the working bin;

the drying component is used for generating hot air and sending the hot air into the working bin;

by adopting the technical scheme, the cleaning agent is injected into the working bin by the agent washing liquid supply assembly, and the ultrasonic wave emitted by the ultrasonic assembly is utilized to excite the cleaning agent in the working bin to generate a cavitation effect, so that the workpiece in the working bin is efficiently cleaned; and then, the cleaning agent in the working bin is recovered by the agent washing liquid supply assembly. After the cleaning agent is recovered, clean water is injected into the working bin through the rinsing liquid supply assembly, the ultrasonic waves emitted by the ultrasonic assembly are utilized to excite the clean water in the working bin to generate a cavitation effect, the cavitation effect can be utilized to carry out efficient rinsing on the workpiece in the working bin, and the rinsing liquid supply assembly recovers the rinsed clean water; the drying component sends hot air into the working bin so that the workpiece is dried. The work piece is in the working bin all the time at the whole in-process that washs to rinsing to drying, and need not shift the work piece to the operating position of three different functions to improve work piece abluent efficiency.

Optionally, the agent washing liquid supply assembly comprises an agent washing bin for containing a cleaning agent, the agent washing bin is communicated with the working bin through an agent washing injection pipe and an agent washing return pipe, the agent washing injection pipe is provided with an agent washing injection pump for pumping the cleaning agent in the agent washing bin into the working bin, the working bin is communicated with the agent washing bin through a hot air pipe, and hot air can enter the agent washing bin from the hot air pipe.

By adopting the technical scheme, the workpiece is in the drying stage, and hot air in the working bin can enter the agent washing bin through the hot air pipe while drying the workpiece, so that the temperature of the cleaning agent in the agent washing bin is increased. The lowest sound pressure or sound intensity amplitude value required by the liquid for generating cavitation is called as a cavitation threshold, according to the forming characteristics of ultrasonic cavitation, the cavitation threshold is related to the temperature of the liquid for the same liquid, and the temperature rise of the cleaning liquid is more beneficial to the formation of the cavitation on the basis of normal temperature.

In this technical scheme, the intercommunication mouth of hot air pipe and working bin is equivalent to the gas outlet of working bin, and hot air still can let in the hot air pipe through the gas outlet of working bin after being supplied into the working bin. Therefore, hot air can dry the workpiece in the working bin, and the hot air can be guided into the cleaning bin through the hot air pipe to heat the cleaning agent, so that the cavitation threshold of the cleaning liquid is reduced, waste heat is effectively utilized, and the effect of secondary utilization of the hot air is realized.

Optionally, the temperature of the hot air generated by the drying component is set to be 60-70 ℃.

By adopting the technical scheme, for the same cleaning agent, the higher the temperature of the cleaning agent is, the more beneficial the cavitation is, but when the temperature is too high, the vapor pressure in the bubbles is increased, so that the buffering effect is enhanced when the bubbles are closed, the cavitation effect is weakened, and the more suitable temperature for the cleaning agent is about 60 ℃. Because the hot air reaches the agent washing bin from the drying component through the working bin and has temperature loss, the temperature of the hot air generated by the drying component is set to be 60-70 ℃, and the temperature of the hot air reaching the agent washing bin through the loss is close to the temperature suitable for cavitation of the cleaning liquid, so that the cleaning agent in the agent washing bin is kept in a temperature range suitable for cavitation, and the ultrasonic cleaning agent is ensured to be in a state suitable for cavitation.

Optionally, one side of the hot air pipe close to the chemical washing bin is communicated with an air guide pipe, and one end of the air guide pipe, which is far away from the hot air pipe, extends below the liquid level of the cleaning agent.

Through adopting above-mentioned technical scheme, the one end that the hot air pipe place was kept away from to the gas guide pipe stretches into below the liquid level of cleaner, and the hot-air lets in to the cleaner to make the hot-air can be abundant and the cleaner contact, thereby improve the heat transfer efficiency between hot-air and the cleaner. The gas guide pipe can also play a role in stirring the cleaning agent after extending below the liquid level of the cleaning agent, so that the cleaning agent is heated more uniformly by hot air.

Optionally, one end of the gas guide pipe, which is far away from the agent washing return pipe, is provided with a gas dispersion pipe for dispersing heat air.

Theoretically, pure liquid molecules have strong binding force, so the pure liquid molecules have extremely high tensile strength. However, in practice, some micro bubbles can be mixed in liquid, the micro bubbles existing in the liquid are called cavitation nuclei, the micro bubbles form weak links of the liquid, when a negative pressure phase formed by ultrasonic waves is strong enough, the liquid is firstly pulled at the weak links to form cavities and grow up, then the cavities are compressed under the action of the coming positive pressure to be quickly closed, and when the volume of gas is shrunk to be extremely small, the cavitation bubbles collapse to generate impact, high-speed jet and other phenomena on the surrounding liquid. Through adopting above-mentioned technical scheme, the one end that hot-air pipe place was kept away from to the gas guide pipe is provided with the gas dispersion pipe that is used for dividing the scattered hot-air, and the gas dispersion pipe disperses the hot-air to in the cleaning agent to improve the quantity of cavitation nuclear in the cleaning agent, so that utilize cavitation to carry out abluent efficiency and quality to the work piece and obtain further improvement.

Optionally, the agent washing return pipe is provided with a filter for filtering residues attached to the surface of the SMT steel mesh in the cleaning agent, and the filter and the agent washing return pipe are detachably connected.

Through adopting above-mentioned technical scheme, the back flow is washed to the agent is provided with the filter, at the in-process that washes the storehouse with the cleaner recovery agent, the filter can filter the cleaner that finishes after the agent washing, so that SMT steel mesh surface adhesion residue in the cleaner can be isolated, the SMT steel mesh surface adhesion residue that the filter was isolated is convenient to be collected and carry out centralized processing, thereby carry out recycle to SMT steel mesh surface adhesion residue, guarantee that the cleaner can reuse many times, in order to improve the utilization efficiency of cleaner. Meanwhile, the filter and the agent washing return pipe are detachably connected, so that the main consumable materials in the filter can be conveniently replaced at regular intervals.

Optionally, the rinsing liquid supply assembly comprises a rinsing bin for containing clean water, and the rinsing bin is communicated with the working bin through a rinsing injection pipe and a rinsing return pipe; the rinsing injection pipe is provided with a rinsing injection pump for pumping clean water in the rinsing bin into the working bin, the rinsing return pipe is provided with a separator for separating the clean water from the cleaning agent, and the separator is detachably connected with the rinsing return pipe.

By adopting the technical scheme, after the workpieces in the working bin are rinsed by clean water, the clean water needs to be recycled to the rinsing bin through the rinsing return pipe. The cleaning agent has been mixed in the clear water after rinsing the work piece, if direct will mix the clear water of cleaning agent and retrieve to the rinsing storehouse in, can cause the clear water pollution in the rinsing storehouse, through set up the separator at the rinsing back flow, the separator is used for separating clear water and cleaning agent to the clear water in guaranteeing the rinsing storehouse is difficult to receive the pollution of cleaning agent. Meanwhile, the separator and the rinsing backflow pipe are detachably connected, so that the main consumable materials in the separator can be conveniently replaced at regular intervals.

Optionally, the working bin comprises a bin cover and a bin body, the bin cover seals the bin body, and the bin cover is provided with an air inlet through which hot air is introduced into the drying assembly; after the bin cover and the bin body are covered, the side face, close to the bin body, of the bin cover is a sealing face, an air knife edge used for distributing heat dissipation air is arranged on the sealing face, and the air knife edge is communicated with the air inlet.

Through adopting above-mentioned technical scheme, hot-air enters into the internal of storehouse from the air knife mouth through the air inlet, and the air knife mouth is used for dispersing hot-air to make hot-air at internal homodisperse in storehouse, among the conventional technological means, hot-air directly blows to the work piece from the air inlet, and the position of being heated of work piece is more concentrated, thereby leads to the stoving effect of work piece inhomogeneous. And in this technical scheme, the air knife mouth disperses the hot air to make the work piece be heated evenly, the stoving effect of work piece is better.

Optionally, a workpiece placing frame for loading workpieces is arranged in the working bin, and the workpiece placing frame can be taken out of or put into the working bin.

Through adopting above-mentioned technical scheme, load the work piece to the work piece rack on, then put into the work bin with the work piece rack that loads the work piece and wash. After the cleaning is finished, the cleaned workpiece is taken out by operating the workpiece placing frame, so that the workpiece does not need to be directly grabbed, and the condition that the workpiece is subjected to secondary pollution due to taking out is favorably improved.

In a second aspect, the present application provides an ultrasonic cleaning method, which adopts the following technical solution.

An ultrasonic cleaning method adopts the ultrasonic cleaning machine, and the cleaning steps are as follows:

putting a workpiece to be cleaned into the working bin;

cleaning, namely injecting a cleaning agent in the agent washing bin into the working bin, ultrasonically cleaning the workpiece, and recovering the cleaning agent to the agent washing bin after cleaning;

rinsing, namely injecting clear water into the working bin, rinsing the workpiece by ultrasonic waves, and discharging the clear water from the working bin after rinsing is finished;

repeating the cleaning work and the rinsing work n times in sequence, wherein n is more than or equal to 0;

drying, namely introducing hot air into the working bin to dry the workpiece, and meanwhile, leading the hot air to flow from the working bin to the agent washing bin to heat and add oxygen to the cleaning agent;

and taking out the cleaned workpiece.

Through adopting above-mentioned technical scheme, put into in the working bin and treat the washing work piece, the agent is washed and is supplied the liquid subassembly and pour into the cleaner into to the working bin, utilizes the ultrasonic wave that the ultrasonic wave subassembly sent to arouse the cleaner in the working bin and produce cavitation effect to carry out high-efficient washing to the work piece in the working bin, then the agent is washed and is supplied the liquid subassembly to retrieve the cleaner in the working bin. Then, the rinsing liquid supply assembly injects clean water into the working bin, ultrasonic waves emitted by the ultrasonic assembly are utilized to excite a cleaning agent in the working bin to generate a cavitation effect, the workpieces in the working bin are efficiently rinsed, and the rinsing liquid supply assembly recovers the rinsed clean water; the cleaning work and the rinsing work can be repeated for a plurality of times in sequence according to the cleaning requirement. The drying component sends hot air into the working bin so that the workpiece is dried. In the drying stage of the workpiece, hot air in the working bin can enter the cleaning agent bin through the hot air pipe while drying the workpiece, and heats and adds oxygen to the cleaning agent so as to improve the temperature and the air content of the cleaning agent in the cleaning agent bin. Because the cleaning agent circulates in the working bin and the cleaning agent bin, the heated cleaning agent can be pumped into the working bin from the cleaning agent bin through the cleaning agent liquid supply assembly, so that the cleaning agent injected into the working bin is ensured, the temperature of the cleaning agent is in a temperature range suitable for cavitation, the air content in the cleaning agent is sufficient, the minimum sound pressure or sound intensity amplitude required for generating cavitation in the cleaning agent is lower, the ultrasonic assembly can enable the cleaning agent to generate cavitation under the condition of lower power, and the working efficiency of the ultrasonic cleaning agent is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. a work piece is washed, rinsed and dried in the working bin through the agent, in the whole process from washing to rinsing to drying, the work piece is always in the working bin, and the work piece does not need to be transferred to three working positions with different functions, so that the efficiency of cleaning the work piece is improved;

2. when hot air heats a cleaning agent through a hot air pipe while drying a workpiece, a cleaning agent injection pump pumps the cleaning agent with increased temperature into a working chamber through a cleaning agent injection pipe to perform ultrasonic cleaning on the workpiece, the temperature of the cleaning agent is increased, so that the cavitation threshold value of the cleaning agent is reduced, the minimum sound pressure or the sound intensity amplitude value required by cavitation generated in the cleaning agent is lower, and the cleaning agent can be cavitated by an ultrasonic component under the condition of lower power, so that the cleaning efficiency and the cleaning quality of the ultrasonic cleaning agent are improved;

3. the ultrasonic cleaning method has the advantages that the cleaning agent circulates in the working bin and the cleaning bin, the temperature of the cleaning agent is in the temperature range suitable for cavitation in the working bin, the air content in the cleaning agent is sufficient, so that the minimum sound pressure or sound intensity amplitude required for generating cavitation in the cleaning agent is lower, the ultrasonic assembly can enable the cleaning agent to generate cavitation under the condition of lower power, and the cleaning efficiency and the cleaning quality of the ultrasonic cleaning agent are improved.

Drawings

FIG. 1 is a schematic top view of an ultrasonic cleaning machine of the background art, showing the positional relationship between a chemical washing tank, a rinsing tank and a drying tank;

FIG. 2 is a schematic view of the overall structure of an ultrasonic cleaning machine in the embodiment of the present application;

FIG. 3 is a schematic view showing the overall structure of the inside of the ultrasonic cleaning machine in the embodiment of the present application;

FIG. 4 is a schematic diagram of an exemplary liquid wash assembly according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of the structure inside the working chamber in the embodiment of the present application;

FIG. 6 is a schematic view of a cleaning liquid supply assembly according to an embodiment of the present application.

Description of reference numerals:

1', washing a tank by using an agent; 2', a rinsing tank; 3', a drying groove; 4', an ultrasonic component;

1. a frame; 11. a first locking member; 12. a mounting cavity; 13. a protective panel; 14. an electric control panel;

2. a working bin; 21. a bin cover; 211. an air inlet; 212. a sealing surface; 2121. a wind blade edge; 2122. a sealing strip; 213. a second locking member; 22. a bin body; 23. a workpiece placing rack; 24. a liquid level gauge;

3. an ultrasonic component;

4. a chemical wash liquid supply assembly; 41. washing a bin with the agent; 42. washing the injection pipe with the agent; 43. washing the reflux pipe with agent; 431. a gas introduction tube; 432. a gas dispersion tube; 433. a filter; 44. an agent washing injection pump; 45. a control valve for chemical washing; 46. a reflux pump is washed by the agent;

5. a rinsing liquid supply assembly; 51. a rinsing bin; 52. rinsing the injection pipe; 53. rinsing the backflow pipe; 531. a separator; 54. rinsing the injection pump; 55. a rinsing control valve; 56. rinsing the reflux pump;

6. a drying assembly; 61. a blower; 62. heating a tube; 63. a temperature controller; 64. a hot air duct;

7. a hot air pipe; 71. butterfly valves.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses an ultrasonic cleaning machine. Referring to fig. 2 and 3, an ultrasonic cleaning machine comprises a frame 1, a working bin 2, an ultrasonic assembly 3, a chemical washing liquid supply assembly 4, a rinsing liquid supply assembly 5 and a drying assembly 6. Frame 1 is the setting of cuboid skeleton, and frame 1 outside has protecting panel 13 and electrical panel 14, and protecting panel 13 is used for enclosing the inside spare part of this equipment, and electrical panel 14 is used for controlling each electric spare part of ultrasonic cleaner, and protecting panel 13 is inside to be provided with the radiating air fan (not shown in the figure), and the radiating air fan dispels the heat to this equipment inside. The frame 1 is provided with a mounting cavity 12, the working chamber 2 is partially arranged in the mounting cavity 12 and fixedly arranged at the upper part of the frame 1, and the ultrasonic assembly 3 is arranged on the side surface of the working chamber 2. The agent washing liquid supply assembly 4 and the rinsing liquid supply assembly 5 are both arranged at the lower part of the rack 1, the agent washing liquid supply assembly 4 and the rinsing liquid supply assembly 5 are communicated with the working bin 2 through pipelines, the agent washing liquid supply assembly 4 is used for injecting or recovering a cleaning agent into the working bin 2, and the rinsing liquid supply assembly 5 is used for injecting or recovering clean water into the working bin 2. Drying assembly 6 installs in frame 1 and communicates with working bin 2 through the bellows, and drying assembly 6 is used for generating hot-air and sends hot-air into working bin 2.

Referring to fig. 2 and 3, in order to improve the situation that the workpiece is secondarily contaminated due to the grabbing, a workpiece placing rack 23 for loading the workpiece is arranged in the working chamber 2, and the workpiece placing rack 23 can be taken out of the working chamber 2 or put into the working chamber 2. The work is loaded on the work rack 23, and then the work rack 23 loaded with the work is put into the work bin 2 to be cleaned. After the cleaning is finished, the workpiece after the cleaning is taken out by operating the workpiece placing frame 23, so that the workpiece does not need to be directly grabbed, and the cleanliness of the workpiece after the cleaning is finished is ensured. In another embodiment, the workpiece placing frame 23 and the workpiece in the workpiece placing frame 23 can be automatically identified and clamped by a manipulator without manual operation, so that automation and intellectualization of the ultrasonic cleaning equipment are realized.

Referring to fig. 2 and 3, the working bin 2 includes a bin cover 21 and a bin body 22, the bin cover 21 is hinged to the upper surface of the top end of the rack 1, the bin body 22 is fixedly mounted on the lower surface of the top end of the rack 1, the bin cover 21 can rotate around a hinge point and seal the bin body 22, and the side surface of the bin cover 21 sealing the bin body 22 is a sealing surface 212. In order to improve the sealing performance of the lid 21, a seal 2122 is provided on the sealing surface 212. When a workpiece is taken and placed, in order to ensure that the bin cover 21 can be automatically opened and closed, the gas spring is installed on the bin cover 21, in some other embodiments, the gas spring can be replaced by any one of pneumatic, hydraulic or electric control units, and all equivalent changes made according to the structure, shape and principle of the application are covered in the protection scope of the application. One end of the gas spring is arranged on the side surface of the bin cover 21, and the other end is arranged on the upper surface of the frame 1.

Referring to fig. 2 and 3, in order to enable the bin cover 21 to tightly cover the bin body 22 and keep a sealed state all the time, the second locking member 213 is installed on the side surface of the bin cover 21, the first locking member 11 in clamping fit with the second locking member 213 is installed on the top of the machine frame 1, and when the second locking member 213 on the bin cover 21 is in clamping fit with the first locking member 11 on the machine frame 1, the bin cover 21 is pressed against the bin body 22 to form a seal. In order to control the volume of the liquid in the bin body 22, a liquid level device 24 is arranged above the bin body 22, and when the liquid level in the bin body 22 is higher than the maximum limit volume of the liquid level device 24, the liquid level device 24 washes the liquid supply component 4 or rinses the liquid supply component 5 through a control agent so as to stop injecting cleaning agent or clean water into the bin body 22, thereby controlling the maximum containing volume of the bin body 22 and preventing the cleaning agent or the clean water in the bin body 22 from flowing backwards. Referring to fig. 2 and 3, the bin cover 21 is hollow, an air inlet 211 for introducing hot air into the drying assembly 6 is disposed on one side of the bin cover 21 away from the sealing surface 212, the hot air conduit 64 is mounted on the air inlet 211, and the sealing surface 212 is provided with an air knife opening 2121 for distributing heat dissipation air. In this embodiment, the air knife openings 2121 are long kidney-shaped slots, and two air knife openings 2121 are provided, and in some other embodiments, the number of the air knife openings 2121 may be other positive integer. The hot air enters the bin cover 21 from the air inlet 211 through the corrugated pipe and then enters the bin body 22 from the air knife edge 2121, so that the drying hot air is uniformly dispersed in the bin body 22, and the drying effect of the workpieces is better.

Referring to fig. 2 and 3, the drying assembly 6 includes a blower 61, a heating duct 62, and a temperature controller 63, the blower 61 is installed inside the frame 1, the heating duct 62 is installed at an air outlet of the blower 61, and the heating duct 62 is communicated with an air inlet 211 of the bin cover 21 through a bellows. The heating duct 62 is used to heat the air so that the air blown out of the drying assembly 6 has an initial temperature. In this embodiment, the temperature controller 63 is installed above the heating pipe 62, so that the temperature of the air heated by the heating pipe 62 can be controlled to be 60-70 ℃, and the temperature of the hot air reaching the inside of the chemical washing chamber 41 through loss is close to the temperature suitable for cavitation of the cleaning liquid, thereby ensuring that the cleaning agent in the chemical washing chamber 41 is kept in a temperature range suitable for cavitation, and ensuring that the ultrasonic cleaning agent is in a state suitable for cavitation.

Referring to fig. 4 and 5, the chemical washing and liquid supplying assembly 4 includes a chemical washing bin 41, a chemical washing injection pipe 42, a chemical washing return pipe 43, a chemical washing injection pump 44 and a chemical washing control valve 45, the chemical washing bin 41 is detachably fixed at the bottom of the installation cavity 12, the chemical washing bin 41 is communicated with the working bin 2 through the chemical washing injection pipe 42 and the chemical washing return pipe 43, the chemical washing injection pump 44 is installed at the middle position of the chemical washing injection pipe 42, and the chemical washing injection pump 44 is used for pumping the cleaning agent in the chemical washing bin 41 into the working bin 2. The agent washing return pipe 43 is provided with an agent washing return pump 46, and the agent washing return pump 46 is used for pumping the cleaning agent in the working bin 2 into the agent washing bin 41. The chemical washing control valve 45 is arranged at one end of the chemical washing return pipe 43 close to the working bin 2. The agent washing return pipe 43 is also provided with a filter 433, the filter 433 is arranged between the working bin 2 and the agent washing injection pump 44, and the filter 433 is detachably connected with the agent washing return pipe 43. Control valve 45 is washed to agent is used for controlling working bin 2 and the intercommunication of agent washing bin 41, filter 433 is arranged in filtering the SMT steel mesh surface adhesion residue in the cleaner, so that SMT steel mesh surface adhesion residue in the cleaner can be isolated, the SMT steel mesh surface adhesion residue that filter 433 isolated is convenient to be collected and carry out centralized processing, thereby carry out recycle to SMT steel mesh surface adhesion residue, guarantee that the cleaner can reuse many times, in order to improve the utilization efficiency of cleaner. Meanwhile, because the filter 433 is detachably connected with the agent washing return pipe 43, the main consumable materials in the filter 433 can be conveniently replaced at regular intervals.

It is worth mentioning that, referring to fig. 4 and 5, the working bin 2 is communicated with the chemical washing bin 41 through a hot air pipe 7, a gas guide pipe 431 is communicated with a side of the hot air pipe 7 close to the chemical washing bin 41, the gas guide pipe 431 is located in the chemical washing bin 41, an end of the gas guide pipe 431 far away from the chemical washing return pipe 43 extends below the liquid level of the cleaning agent, and an end of the gas guide pipe 431 far away from the chemical washing return pipe 43 is provided with a gas dispersion pipe 432 for dispersing heat air, in this embodiment, the gas dispersion pipe 432 may be a bubbled stone.

In another embodiment, the gas distribution pipe 432 may be in the shape of an inverted funnel, and the funnel-shaped gas distribution pipe 432 has a large end and a small end, the small end is communicated with the gas guide pipe 431, and the large end is suspended right above the liquid level of the cleaning agent, so as to achieve the effect of uniformly heating the cleaning agent.

In another embodiment, the gas distribution pipe 432 may be configured as a plurality of capillaries, one ends of the plurality of capillaries communicate with the gas guide pipe 431, and the other ends of the plurality of capillaries extend below the liquid level of the cleaning solution, so as to achieve the effects of uniformly heating the cleaning solution and injecting oxygen.

Referring to fig. 4 and 5, during the drying stage of the workpiece, the hot air in the working bin 2 can enter the rinsing agent bin 41 through the hot air pipe 7 while drying the workpiece, so as to increase the temperature of the rinsing agent in the rinsing agent bin 41. In order to prevent liquid from entering the hot air pipe 7, the hot air pipe 7 is arranged in an inclined manner, the inclined direction of the hot air pipe 7 is inclined downwards towards one side of the working bin 2, and the hot air pipe is provided with a butterfly valve 71 which is opened and closed by controlling the butterfly valve 71, so that the hot air pipe is conveniently opened and closed. Meanwhile, the gas guide pipe 431 extends into the position below the liquid level of the cleaning agent and can also play a role in stirring the cleaning agent, so that the hot air can be heated more uniformly, the gas dispersion pipe 432 disperses the hot air into the cleaning agent, the number of hollow nuclei in the cleaning agent is increased, and the efficiency of cleaning the workpiece by utilizing the cavitation effect is further increased. In order to facilitate the liquid and the SMT steel mesh surface attachment residue of 2 bottoms of working bin to flow out completely, the bottom of working bin 2 is the slope setting, and the incline direction of working bin 2 is the one side downward sloping at orientation filter 433 place, and the bottom of working bin 2 is provided with non-stick coating to make SMT steel mesh surface attachment residue flow out in working bin 2 smoothly, so that working bin 2 has self-cleaning function.

Referring to fig. 3 and 6, the rinse liquid supply assembly 5 includes a rinse tank 51, a rinse injection pipe 52, a rinse return pipe 53, a rinse injection pump 54, and a rinse control valve 55. The rinsing bin 51 is detachably fixed at the bottom of the installation cavity 12, the rinsing bin 51 is communicated with the working bin 2 through a rinsing injection pipe 52 and a rinsing return pipe 53, a rinsing injection pump 54 is installed at the middle section of the rinsing injection pipe 52, and the rinsing injection pump 54 is used for pumping clean water in the rinsing bin 51 into the working bin 2. The rinse return pipe 53 is provided with a rinse return pump 56, and the rinse return pump 56 is used to pump the cleaning agent in the working chamber 2 into the rinse chamber 51. The rinsing control valve 55 is installed at an end of the rinsing return pipe 53 near the working chamber 2, and for convenience of control, the rinsing control valve 55 is integrated with the chemical washing control valve 45. A separator 531 is installed between the working chamber 2 and the rinsing injection pump 54, and the separator 531 is detachably connected to the rinsing return pipe 53. The rinsing control valve 55 is used for controlling the working chamber 2 to communicate with the rinsing chamber 51. In this embodiment, the separator 531 comprises a separation membrane for separating the clean water from the cleaning agent, so as to ensure that the clean water in the rinsing bin 51 is not easily polluted by the cleaning agent. Meanwhile, since the separator 531 is detachably connected to the rinsing return pipe 53, it is convenient to periodically replace consumables in the separator 531.

The embodiment of the application also discloses an ultrasonic cleaning method, the ultrasonic cleaning machine is adopted, and the cleaning steps are as follows:

placing a workpiece to be cleaned in the workpiece placing frame 23, then placing the workpiece placing frame 23 with the cleaned workpiece in the bin body 22, closing the bin cover 21, and fastening the second locking piece 213 and the first locking piece 11;

cleaning, injecting a cleaning agent in the agent washing bin 41 into the working bin 2 through the agent washing injection pump 44, ultrasonically cleaning the workpiece, opening the agent washing control valve 45 and starting the agent washing return pump 46 after cleaning is finished, recovering the cleaning liquid into the agent washing bin 41, and filtering residues attached to the surface of the SMT steel mesh washed by the agent through the filter 433;

rinsing, namely, injecting clean water in a rinsing bin 51 into the working bin 2 through a rinsing injection pump 54, rinsing the workpiece by ultrasonic waves, after rinsing is finished, opening a rinsing control valve 55, starting a rinsing reflux pump 56 to pump out the rinsed liquid after cleaning from the working bin 2, and separating the rinsed liquid by using a separator 531;

the cleaning work and the rinsing work are repeated in sequence for a plurality of times, in this embodiment, the number of repetition times can be one;

drying, namely introducing hot air into the working bin 2 to dry the workpiece, and simultaneously opening a butterfly valve 71 on a hot air pipe 7 to ensure that the hot air in the working bin 2 is introduced into the cleaning agent bin 41 to heat the cleaning agent;

and taking out the cleaned workpiece, and cleaning the next workpiece to be cleaned.

The implementation principle of the embodiment of the application is as follows: a workpiece to be cleaned is placed in the working bin 2, a cleaning agent is injected into the working bin 2 by the agent washing liquid supply assembly 4, the workpiece in the working bin 2 is cleaned by ultrasonic waves, and the cleaning agent is recycled to the agent washing bin 41 through the hot air pipe 7; the rinsing liquid supply component 5 injects clear water into the working bin 2 and rinses the workpiece in the working bin 2 by using ultrasonic waves, and the liquid after rinsing is separated by the separator 531 and then is recycled into the rinsing bin 51; the cleaning work and the rinsing work can be repeated for a plurality of times in sequence according to the cleaning requirement. The drying component 6 sends hot air into the working bin 2, the hot air in the working bin 2 can enter the cleaning agent washing bin 41 through the hot air pipe 7 while drying the workpiece, and heats and adds oxygen to the cleaning agent so as to improve the temperature and the air content of the cleaning agent in the cleaning agent washing bin 41. Because the cleaning agent circulates in the working bin 2 and the cleaning agent bin 41, the heated cleaning agent is injected into the working bin 2, the temperature of the cleaning agent is within the temperature range suitable for cavitation, the air content in the cleaning agent is sufficient, so that the minimum sound pressure or the sound intensity amplitude required by the cavitation generated in the cleaning agent is lower, the ultrasonic wave component 3 can enable the cleaning agent to generate the cavitation under the condition of lower power, and the working efficiency of the ultrasonic cleaning agent is improved.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereby. Wherein like parts are designated by like reference numerals. It should be noted that as used in the foregoing description, the terms "front," "back," "left," "right," "upper" and "lower" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. An ultrasonic cleaning machine, comprising:

a frame (1);

the working bin (2) is used for containing a workpiece to be cleaned, and the working bin (2) is fixedly connected with the rack (1);

the ultrasonic assembly (3) is used for generating ultrasonic waves, and the ultrasonic assembly (3) is arranged on the outer side wall of the working bin (2);

the agent washing liquid supply assembly (4) is used for injecting cleaning agents into the working bin (2) or recovering the cleaning agents from the working bin (2);

the rinsing liquid supply assembly (5) is used for injecting clean water into the working bin (2) or recovering the clean water from the working bin (2);

and the drying component (6) is used for generating hot air and sending the hot air into the working bin (2).

2. The ultrasonic cleaning machine according to claim 1, wherein the agent washing and liquid supplying assembly (4) comprises an agent washing bin (41) for containing a cleaning agent, the agent washing bin (41) is communicated with the working bin (2) through an agent washing injection pipe (42) and an agent washing return pipe (43), the agent washing injection pipe (42) is provided with an agent washing injection pump (44) for pumping the cleaning agent in the agent washing bin (41) into the working bin (2), the working bin (2) is communicated with the agent washing bin (41) through a hot air pipe (7), and hot air can enter the agent washing bin (41) from the hot air pipe (7).

3. An ultrasonic cleaning machine according to claim 2, characterized in that the temperature of the hot air generated by the drying assembly (6) is set to 60-70 ℃.

4. The ultrasonic cleaning machine according to claim 3, wherein a gas guide pipe (431) is communicated with one side of the hot air pipe (7) close to the cleaning bin (41), and one end of the gas guide pipe (431) far away from the hot air pipe (7) extends into the liquid level of the cleaning agent.

5. An ultrasonic cleaning machine according to claim 4, characterized in that the end of the gas guide pipe (431) remote from the agent washing return pipe (43) is provided with a gas dispersion pipe (432) for dispersing the heat air.

6. An ultrasonic cleaning machine according to claim 2, characterized in that the agent washing and returning pipe (43) is provided with a filter (433) for filtering residues adhered on the surface of the SMT steel mesh in the cleaning agent, and the filter (433) is detachably connected with the agent washing and returning pipe (43).

7. An ultrasonic cleaning machine according to claim 1, characterized in that the rinsing liquid supply assembly (5) comprises a rinsing bin (51) for containing clean water, the rinsing bin (51) is communicated with the working bin (2) through a rinsing injection pipe (52) and a rinsing return pipe (53); the rinsing injection pipe (52) is provided with and is used for with clear water pump income in the rinsing storehouse (51) rinsing injection pump (54) in the working bin (2), rinsing back flow (53) are provided with separator (531) that are used for separating clear water and cleaner, separator (531) with rinsing back flow (53) can be dismantled and be connected.

8. An ultrasonic cleaning machine according to claim 1, characterized in that said working chamber (2) comprises a chamber cover (21) and a chamber body (22), said chamber cover (21) seals said chamber body (22), said chamber cover (21) is provided with an air inlet (211) for hot air to pass through by said drying assembly (6); after the bin cover (21) and the bin body (22) are covered, the side surface of the bin cover (21) close to the bin body (22) is a sealing surface (212), the sealing surface (212) is provided with an air knife edge (2121) used for distributing heat dissipation air, and the air knife edge (2121) is communicated with the air inlet (211).

9. An ultrasonic cleaning machine according to claim 1, characterized in that a workpiece placing rack (23) for loading workpieces is arranged in the working chamber (2), and the workpiece placing rack (23) can be taken out of the working chamber (2) or put into the working chamber (2).

10. An ultrasonic cleaning method using the ultrasonic cleaning machine according to any one of claims 2 to 6, the cleaning step being:

a workpiece to be cleaned is put into the working bin (2);

cleaning work, namely injecting a cleaning agent in the agent washing bin (41) into the working bin (2), ultrasonically cleaning the workpiece, and recovering the cleaning agent to the agent washing bin (41) after cleaning is finished;

rinsing, namely, injecting clean water into the working bin (2), rinsing the workpiece by ultrasonic waves, and discharging the clean water from the working bin (2) after rinsing is finished;

repeating the cleaning work and the rinsing work n times in sequence, wherein n is more than or equal to 0;

drying, namely introducing hot air into the working bin (2) to dry the workpiece, and meanwhile, allowing the hot air to flow from the working bin (2) to the cleaning agent bin (41) to heat and add oxygen to the cleaning agent;

and taking out the cleaned workpiece.

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