Principle of ultrasonic cleaning machine


Release time:

2020-05-12

1. ultrasonic cleaning principle:
The high-frequency oscillation signal emitted by the ultrasonic generator is converted into high-frequency mechanical oscillation by the transducer and transmitted to the medium-cleaning solvent. The ultrasonic wave radiates forward in the cleaning liquid, causing the liquid to flow and produce Tens of thousands of tiny bubbles. These bubbles form and grow in the negative pressure zone of ultrasonic longitudinal propagation, and close rapidly in the positive pressure zone. In this process, which is called the "cavity" effect, the bubble closure can form an instantaneous high pressure of more than 1000 atmospheres, and the instantaneous high pressure is continuously generated like a series of small "explosions" that continuously impact the surface of the object, so that the dirt in the surface and the gap of the object is rapidly peeled off, so as to achieve the purpose of purifying the surface of the object. The installation of ultrasonic shock head and cleaning tank is as follows:

In the above figure, the cleaning tank body located between the transducer and the cleaning liquid is a stainless steel vibration surface steel plate, on which the ultrasonic transducer is adhered, and an AC voltage signal with a certain frequency and voltage is generated through the ultrasonic generating source (circuit board) to drive the transducer and the stainless steel plate to make high-frequency vibration together. When the steel plate vibrates upward, the water is pushed upward. When the steel plate vibrates downward, the vibration speed of the water steel plate cannot keep up, A gap will be formed between the water and the steel plate, so that repeated vibrations will have many bubbles formed. This bubble is produced by the "cavity effect", which we call cavity bubbles. The cavity bubble propagates to the water along the vibration direction. If there is a workpiece in the water, the cavity bubble hits the surface of the workpiece to generate an impact force of thousands of atmospheres, which drives the dirt on the surface of the workpiece to fall off.
2. ultrasonic cleaning related technical problems:
1, ultrasonic frequency: physically the frequency is greater than 20KHz mechanical wave called ultrasonic; ultrasonic frequency is lower in the liquid cavity is easier to produce, the strength, the role is stronger, suitable for the workpiece (coarse, dirty) washing; ultrasonic frequency high ultrasonic directional strong, suitable for precision cleaning of fine workpiece.
2. Sound power density (ρ):ρ = emission power (W)/emission area (CM2); Usually ρ ≥ 0.3W/CM2 can meet the cleaning requirements. Our commonly used ultrasonic power density is greater than 0.5W/CM2, which can be fully satisfied for ordinary industrial cleaning. The higher the power density, the stronger the cavity effect, the faster the speed, and the better the cleaning effect. But for precision, high surface finish products, the use of long-term high power density cleaning will produce "cavity" corrosion on the surface of the product.
3, cleaning medium: ultrasonic cleaning generally chemical cleaning agent and water-based cleaning agent two types of cleaning agent; cleaning medium can accelerate the chemical effect of ultrasonic cleaning effect, ultrasonic cleaning is a physical role, the combination of the two functions, in order to fully and thoroughly clean the product.
4, cleaning temperature: in general, the cavity effect of ultrasonic at 30-40 ℃ is the best; if the use of cleaning agent, the higher the temperature, the more significant. Usually the actual application of ultrasonic cleaning, the use of 40-60 ℃ working temperature is better.
5. The placement method of the product during cleaning and the selection of the amount of cleaning fluid: The liquid level of the general cleaning fluid should be higher than the vibration surface by more than 50mm. For larger workpieces, the stainless steel net cage is generally used for cleaning. The mesh of the net cage has a certain effect on the cleaning effect. At present, the mesh required for industrial cleaning should be greater than 10mm.
Application of 3. ultrasonic cleaning:
Used in automobile industry, hardware industry, electronics industry, laboratory, printing industry, electroplating industry, optical industry, precision parts industry, glasses industry, jewelry industry, jade industry, watch industry, semiconductor industry, communication equipment industry, precious metal industry, stainless steel industry, power industry, etc.
Advantages of ultrasonic cleaning:
Compared with other cleaning methods, ultrasonic cleaning machine has shown great advantages, especially in specialized and group production enterprises, ultrasonic cleaning process has gradually replaced the traditional dipping, rinsing, pressure washing, vibration cleaning and steam cleaning, etc. The high efficiency and high cleanliness of ultrasonic cleaning machine benefit from the penetration and cavitation impact force generated by ultrasonic transmission in the medium, therefore, it is easy to clean the parts with complex shapes, inner cavities and fine holes. For general oil removal, rust prevention, phosphating and other technological processes, it only takes two or three minutes to complete under the action of ultrasonic waves, and its speed is several times higher than that of traditional cleaning methods, even dozens of times, and the cleanliness can also reach high standards. This is in many occasions that require higher product surface quality and productivity, results that cannot be achieved or replaced by other treatments are highlighted. Summarize its advantages as follows:
① Good cleaning effect, high cleanliness and consistent cleanliness of all workpieces;
The cleaning speed is fast, improve production efficiency;
No human contact cleaning fluid, safe and reliable;
The deep hole, slit and product concealment can also be cleaned;
⑤ Save solvent, heat, work site and labor, etc.
electronic industry ultrasonic cleaning machine:
PCB circuit board cleaning. In China's electronics industry, the vast majority of enterprises are using PCB. The flux used for PCB component welding is divided into three categories: water-soluble, rosin and no-cleaning. The first two are mostly used. Ultrasonic cleaning (many are also scrubbed with alcohol) is mostly used. The no-cleaning type should not be cleaned in principle. However, even if most manufacturers in the world use no-cleaning flux to weld electronic components, it still needs cleaning. In particular, high-density PCB and high-density IC feet, if not cleaned or not used ultrasonic cleaning, will lead to high-density lines and between the IC feet between the adsorption of dust, once the environmental humidity is high, prone to high-density lines and feet between the short circuit and fault, and once the environment is dry, the short circuit fault and disappear, this kind of fault is not easy to find. Therefore, electronic factories all over the world insist on ultrasonic cleaning of PCB boards. In our country, the military electronic machine factory has begun to promote, which not only improves the reliability of products, but also reduces the cost of after-sales service.
hardware industry ultrasonic cleaning machine:
Compared with other kinds of cleaning methods, ultrasonic cleaning machine has shown great advantages, especially in the specialized and group production enterprises, ultrasonic cleaning machine has gradually replaced the traditional dipping, brushing, pressure washing, vibration cleaning and steam cleaning and other process methods. The high efficiency and high cleanliness of ultrasonic cleaning machine benefit from the penetration and cavitation impact force generated when the sound wave propagates in the medium, therefore, it is easy to clean the parts with complex shapes, inner cavities and fine holes. For general oil removal, rust prevention, phosphating and other technological processes, it only takes two or three minutes under the action of ultrasonic waves. The ultrasonic cleaning machine can also be applied: automobile wheels, electroplated parts, vacuum-plated trim parts, motor parts, bearings, die-casting parts, stamping parts, spectacle frames, stainless steel tableware, compressors, clock parts, precision textile equipment, precision molds, gears, crankshafts, valves, radiators Cleaning of oil stains, wax grease, and debris during the production and processing of precision parts such as heat sinks. Widely used in cleaning electronic circuit boards, bearing parts, optical lenses, auto parts, vacuum ion coating parts, metal plating parts, audio heads, precision hardware parts, medical equipment, liquid crystal display, aviation machinery and other industries special cleaning.
electroplating industry ultrasonic cleaning machine:
It is mainly used in electroplating parts, vacuum plating decorations, locks, motor parts, bearings, die castings, stamping parts, watchcase straps, glasses frames, stainless steel tableware, compressors, clock parts, precision textile equipment, precision molds, gears, crankshafts, valves, radiators and other precision metal parts and various metal parts during the production and processing of oil stains, wax grease and debris. Ultrasonic cleaning in the electroplating industry is mainly divided into pre-plating cleaning (pre-treatment) and post-plating cleaning (post-treatment). Pre-electroplating cleaning includes cleaning all kinds of hardware parts after polishing wax grease cleaning and parts processing in the process of oil, debris removal. The post-plating treatment cleaning includes cleaning the residual plating liquid agent and various residues in the plating process.




















The mainultrasonic cleaning agentDivided into the following:
medical ultrasonic cleaning machine:
Ultrasonic cleaning machine used in the medical industry can thoroughly clean the various stains of surgical machinery and surgical accessories, and discharge the problem of incomplete manual cleaning. Therefore, the Ministry of Health of the People's Republic of China published the "Technical Operation Specification for Cleaning and Disinfection of Endoscopes", which stipulates: "Endoscopes and accessories should be cleaned, disinfected or sterilized immediately after use... 5-10 minutes in the ultrasonic cleaning machine." And the use of glutaraldehyde, ethylene oxide immersion disinfection, sterilization. It is stipulated in the "Technical Operation Specification for Disinfection of Oral Diagnosis and Treatment Instruments in Medical Institutions" that dental instruments "should be cleaned by ultrasonic cleaning" and soaked in ethylene oxide and glutaraldehyde for disinfection and sterilization.
laboratory with ultrasonic cleaning machine:
It is mainly used for experimental analysis or cleaning of experimental instruments in biochemistry, microbiology, pharmacology, physics, zoology, agronomy, medicine, food, pharmaceutical and other industries. It is also widely used in electronic, optical, mechanical, automobile, electroplating, hydraulic, jewelry and other industries, such as crushing, emulsification, dispersion, dissolution, purification, defoaming and degassing, accelerating chemical reactions, etc.
automotive industry ultrasonic cleaning machine:
Mainly used for cleaning valves, ignition bolts, fuel pumps, fuel tanks, battery electrodes, piston rings, grease on machine control panel parts, preservatives, plastic residues, abrasive, graphite, etc.
Features of 4. ultrasonic cleaning machine:
1. The inner tank and outer packing of the cleaning machine are all made of imported high-quality 304# stainless steel;
2. The vibration surface steel plate of the cleaning machine is made of 304# stainless steel plate with 3.0mm thickness, and the surface is plated with 100um hard chromium. The vibration surface is strengthened to prolong the service life of the cleaning machine, and the effective working time is up to 10 years;
3. The ultrasonic transducer adopts high-quality products imported from South Korea, and the effective use time is more than ten years;
4. New electronic circuit drive, the power is controlled by thyristor, which is precise and controllable, and the efficiency is greatly improved;
5, the temperature and time of the new digital setting and control, more accurate and reliable;
6. All working states are controlled by microcomputer, with memory function, which can remember the working parameters set before and facilitate cleaning operation;
7. One-piece design, easy to install and use, no separate bracket for the control box.
8. Each package is made of environmentally friendly anti-fall pearl cotton foam.

Since the ultrasonic energy can penetrate fine gaps and small holes, it can be used with any parts or assemblies for cleaning. When the parts to be cleaned are precision parts or assemblies, ultrasonic cleaning is often the only way to meet its special technical requirements;
Fast
Ultrasonic cleaning is much faster than conventional cleaning methods in removing dust and scale from workpieces. The assembly can be cleaned without disassembly. The labor-saving advantage of ultrasonic cleaning often makes it the most economical way of cleaning;
Consistency
No matter whether the cleaned parts are large or small, simple or complex, single piece or batch or on the automatic assembly line, ultrasonic cleaning can obtain the incomparable uniform cleanliness of manual cleaning.
Resibo-professional ultrasonic cleaning agent manufacturers