Selection and cleaning technology of ultrasonic cleaning machine
Author：adminView：5167adddate：2016-11-28
First, the choice of power ultrasonic cleaning effect is not necessarily proportional to (power * cleaning time), sometimes with small power, it takes a long time and no removal of dirt. And if the power reaches a certain value, sometimes remove dirt quickly. If the power is too high, the cavitation intensity will be greatly increased, the cleaning effect is improved, but the more sophisticated parts also produced corrosion, and cleaning the bottom of the cylinder The loss outweighs the gain., vibration plate serious cavitation, water corrosion is also increased, with the organic solvents such as trichloroethylene, basically no problem, but the use of water or water soluble cleaning liquid, prone to water corrosion, if the vibration plate surface has been produced under high power underwater scars, cavitation corrosion is more serious, so choose according to the actual use of ultrasonic power.
Two, frequency selection ultrasonic cleaning frequency from 28kHz to 120kHz, in the use of water or water cleaning agent caused by the hole effect of physical cleaning force is obviously beneficial to low frequency, generally use about 28-40kHz. Small gap, slit, deep hole parts cleaning, with high-frequency (generally 40kHz above) better, or even hundreds of kHz. For clock parts cleaning, using 400kHz. If broadband FM cleaning, the effect is better.
Three, cleaning basket in the cleaning of small parts of goods, often using the basket, due to ultrasonic attenuation caused by mesh, pay special attention. When the frequency is 28kHz 10mm over the use of the mesh as well.
Choose the most suitable water temperature cleaning lotion, four cleaning liquid temperature is 40-60 DEG C, especially in cold weather if the low temperature of liquid cleaning effect is poor, the cleaning effect is poor. So there is some cleaning machine to control the temperature of the cleaning tank outside around the electric heating wire, when the temperature rises after cavitation occurs easily, so the cleaning effect is better. When the temperature continues to rise, the gas pressure in the cavity increases, causing the impact sound pressure drops, reflecting the multiplication of these two factors.
Five, on the amount of cleaning fluid and cleaning parts of the location of the general cleaning liquid level above the vibrator surface 100mm above is preferred. Because the single frequency cleaning machine is affected by the standing wave field, the amplitude of the wave section is very small, and the amplitude of the wave amplitude is large, resulting in uneven cleaning. Therefore the best choice of cleaning items should be placed in the amplitude.
Six, ultrasonic cleaning process and cleaning fluid selection before purchasing cleaning system, cleaning items should be made as follows: application analysis of structure, clear by washing the pieces of material structure and quantity analysis, and clearly to remove the dirt, it is decided to use the cleaning method of what kind of judgment, application of aqueous cleaning liquid or solvent prerequisite. The final cleaning process also need to do cleaning experiments to verify. Only in this way can we provide a suitable cleaning system, design a reasonable cleaning process and cleaning liquid. Taking into account the physical characteristics of the cleaning fluid on the impact of ultrasonic cleaning, including vapor pressure, surface tension, viscosity and density should be the most significant factors. Temperature can affect these factors, so it will also affect the efficiency of cavitation. Any cleaning system must use cleaning fluid.
Choose cleaning liquid, should consider the following three factors: 1 cleaning efficiency: choose the most effective cleaning solvent, must do experiment. Such as the introduction of ultrasonic cleaning technology in existing in the use of solvents generally do not have to change; 2 simple operation: use liquid should be non-toxic, simple operation and long service life; 3 cost: cost of cleaning solvent cheap is not necessarily the lowest. Solvent cleaning efficiency and safety must be taken into account, and a certain amount of solvent can be cleaned. Of course, the selected cleaning solvent must achieve the cleaning effect and should be compatible with the material to be cleaned. Water is the most common cleaning solution, so the system using water-based solution is easy to operate, low cost, wide application. However, for some materials and dirt does not apply to aqueous solutions, then there are many solvents available for selection.
Seven, different cleaning liquid, to distinguish the cleaning system water system: usually by open slot composition, workpiece immersion. The complex system consists of several grooves, equipped with circulating filtration system, flushing tank, drying tank and other accessories. Solvent system for ultrasonic gas phase cleaning machine oil, often equipped with a device for continuously recycling wastewater. Ultrasonic cleaning oil vapor phase process is completed integrated multi tank system formed by solvent evaporation and ultrasonic immersion slot of the slot. Under the combined action of hot solvent steam and ultrasonic agitation, oil, grease, wax and other solvent soluble dirt are removed. After a series of cleaning process after the blanking workpiece heat, clean, dry.
Eight, cleaning parts processing ultrasonic cleaning another consideration is the cleaning parts of the upper / lower material or put the cleaning parts of the tooling design. Cleaning pieces in the ultrasonic cleaning tank, regardless of cleaning pieces or cleaning basket shall not touch the bottom of the tank. The total cross-sectional area of the cleaning parts shall not exceed 70% of the cross-sectional area of the ultrasonic groove. Rubber and non rigid plastics will absorb ultrasonic energy, so this kind of material used for tooling should be cautious. Insulating cleaning parts should also cause special attention. Tooling basket improper design, or the workpiece is too heavy, even if the best ultrasonic cleaning system efficiency will be greatly reduced. Hook, shelf and the beaker can be used to support the clean parts.
Nine, cleaning time, clear the type and quantity of the workpiece to consider using machine working mode is automatic, semi-automatic and manual. The size and cost of the machine.
Ten, other cleaning a lot of dirt parts
Two, frequency selection ultrasonic cleaning frequency from 28kHz to 120kHz, in the use of water or water cleaning agent caused by the hole effect of physical cleaning force is obviously beneficial to low frequency, generally use about 28-40kHz. Small gap, slit, deep hole parts cleaning, with high-frequency (generally 40kHz above) better, or even hundreds of kHz. For clock parts cleaning, using 400kHz. If broadband FM cleaning, the effect is better.
Three, cleaning basket in the cleaning of small parts of goods, often using the basket, due to ultrasonic attenuation caused by mesh, pay special attention. When the frequency is 28kHz 10mm over the use of the mesh as well.
Choose the most suitable water temperature cleaning lotion, four cleaning liquid temperature is 40-60 DEG C, especially in cold weather if the low temperature of liquid cleaning effect is poor, the cleaning effect is poor. So there is some cleaning machine to control the temperature of the cleaning tank outside around the electric heating wire, when the temperature rises after cavitation occurs easily, so the cleaning effect is better. When the temperature continues to rise, the gas pressure in the cavity increases, causing the impact sound pressure drops, reflecting the multiplication of these two factors.
Five, on the amount of cleaning fluid and cleaning parts of the location of the general cleaning liquid level above the vibrator surface 100mm above is preferred. Because the single frequency cleaning machine is affected by the standing wave field, the amplitude of the wave section is very small, and the amplitude of the wave amplitude is large, resulting in uneven cleaning. Therefore the best choice of cleaning items should be placed in the amplitude.
Six, ultrasonic cleaning process and cleaning fluid selection before purchasing cleaning system, cleaning items should be made as follows: application analysis of structure, clear by washing the pieces of material structure and quantity analysis, and clearly to remove the dirt, it is decided to use the cleaning method of what kind of judgment, application of aqueous cleaning liquid or solvent prerequisite. The final cleaning process also need to do cleaning experiments to verify. Only in this way can we provide a suitable cleaning system, design a reasonable cleaning process and cleaning liquid. Taking into account the physical characteristics of the cleaning fluid on the impact of ultrasonic cleaning, including vapor pressure, surface tension, viscosity and density should be the most significant factors. Temperature can affect these factors, so it will also affect the efficiency of cavitation. Any cleaning system must use cleaning fluid.
Choose cleaning liquid, should consider the following three factors: 1 cleaning efficiency: choose the most effective cleaning solvent, must do experiment. Such as the introduction of ultrasonic cleaning technology in existing in the use of solvents generally do not have to change; 2 simple operation: use liquid should be non-toxic, simple operation and long service life; 3 cost: cost of cleaning solvent cheap is not necessarily the lowest. Solvent cleaning efficiency and safety must be taken into account, and a certain amount of solvent can be cleaned. Of course, the selected cleaning solvent must achieve the cleaning effect and should be compatible with the material to be cleaned. Water is the most common cleaning solution, so the system using water-based solution is easy to operate, low cost, wide application. However, for some materials and dirt does not apply to aqueous solutions, then there are many solvents available for selection.
Seven, different cleaning liquid, to distinguish the cleaning system water system: usually by open slot composition, workpiece immersion. The complex system consists of several grooves, equipped with circulating filtration system, flushing tank, drying tank and other accessories. Solvent system for ultrasonic gas phase cleaning machine oil, often equipped with a device for continuously recycling wastewater. Ultrasonic cleaning oil vapor phase process is completed integrated multi tank system formed by solvent evaporation and ultrasonic immersion slot of the slot. Under the combined action of hot solvent steam and ultrasonic agitation, oil, grease, wax and other solvent soluble dirt are removed. After a series of cleaning process after the blanking workpiece heat, clean, dry.
Eight, cleaning parts processing ultrasonic cleaning another consideration is the cleaning parts of the upper / lower material or put the cleaning parts of the tooling design. Cleaning pieces in the ultrasonic cleaning tank, regardless of cleaning pieces or cleaning basket shall not touch the bottom of the tank. The total cross-sectional area of the cleaning parts shall not exceed 70% of the cross-sectional area of the ultrasonic groove. Rubber and non rigid plastics will absorb ultrasonic energy, so this kind of material used for tooling should be cautious. Insulating cleaning parts should also cause special attention. Tooling basket improper design, or the workpiece is too heavy, even if the best ultrasonic cleaning system efficiency will be greatly reduced. Hook, shelf and the beaker can be used to support the clean parts.
Nine, cleaning time, clear the type and quantity of the workpiece to consider using machine working mode is automatic, semi-automatic and manual. The size and cost of the machine.
Ten, other cleaning a lot of dirt parts
