Ultrasonic cleaning process and selection of cleaning solution

在购买清洗系统之前，应对被清洗件做如下应用分析：明确被洗件的材料构成、结构和数量，分析并明确要的污物，这些都是决定所要使用什么样的清洗方法，判断应用水性清洗液还是用溶剂的先决条件。终的清洗工艺还需做清洗实验来验证。只有这样，才能提供合适的清洗系统、设计合理的清洗工序以及清洗液。考虑到清洗液的物理特性对超声清洗的影响，其中蒸汽压、表面张力、黏度以及密度应为显着的影响因素。温度能影响这些因素，所以它也会影响空化作用的效率。任何清洗系统使用清洗液。

Before purchasing the cleaning system, the following application analysis shall be made for the cleaned parts: to clarify the material composition, structure and quantity of the cleaned parts, to analyze and clarify the dirt to be removed, which are the prerequisites for determining the cleaning method to be used and determining whether to use aqueous cleaning solution or solvent. The final cleaning process needs to be verified by cleaning experiment. Only in this way can we provide appropriate cleaning system, reasonably designed cleaning process and cleaning solution. Considering the influence of the physical properties of the cleaning solution on ultrasonic cleaning, the steam pressure, surface tension, viscosity and density should be the significant factors. Temperature can affect these factors, so it will also affect the efficiency of cavitation. Any cleaning system uses cleaning fluid.

选择清洗液时，应考虑以下三个因素：

Three factors should be considered when selecting cleaning fluid:

1．清洗效率：选择有效的清洗溶剂时，一定要做实验。如在现有的清洗工艺中引入超声，所使用的溶剂一般不必变更；

1. cleaning efficiency: when selecting effective cleaning solvent, experiments must be done. If ultrasound is introduced into the existing cleaning process, the solvent used generally does not need to be changed;

2．操作简单：所使用的液体应、操作简单且使用寿命长；

2. simple operation: the liquid used shall be non-toxic, easy to operate and long service life;

3．成本：廉价的清洗溶剂的使用成本并不一定低。使用中考虑到溶剂的清洗效率、性、一定量的溶剂可清洗多少工件利用率高等因素。当然，所选择的清洗溶剂达到清洗效果，并应与所清洗的工件材料相容。水为普通的清洗液，故使用水基溶液的系统操作简便、使用成本低、应用广泛。然而对某些材料以及污垢等并不适用于水性溶液，那么还有许多溶剂可供选用。不同的清洗液，要区分的清洗系统水性系统：通常由敞口槽组成，工件浸没其中。而复杂的系统由多个槽组成，并配备循环过滤系统、冲淋槽、干燥槽以及其它附件。

3. cost: the cost of cheap cleaning solvent is not necessarily low. In use, the factors such as cleaning efficiency and efficiency of the solvent, how many workpieces can be cleaned with a certain amount of solvent, and high utilization rate shall be considered. Of course, the selected cleaning solvent achieves the cleaning effect and should be compatible with the workpiece material to be cleaned. Water is a common cleaning solution, so the system using water-based solution has the advantages of simple operation, low cost and wide application. However, some materials and dirt are not suitable for aqueous solutions, so there are many solvents to choose from. For different cleaning fluids, the cleaning systems to be distinguished are water-based systems: usually composed of open tanks in which the workpiece is immersed. The complex system consists of multiple tanks and is equipped with circulating filtration system, rinsing tank, drying tank and other accessories.

溶剂系统：多为超声波汽相除油脂清洗机，常配备废液连续回收装置。超声波汽相油脂过程是由溶剂蒸发槽和超声浸洗槽成的集成式多槽系统完成的。在热的溶剂蒸汽和超声激荡共同用下，油、脂、蜡以及其他溶于溶剂的污垢被除去。经过一列清洗工序后下料的工件发热、洁净、干燥。

Solvent system: most of them are ultrasonic vapor phase grease removal cleaning machines, which are often equipped with waste liquid continuous recovery devices. The ultrasonic vapor phase grease removal process is completed by an integrated multi tank system composed of solvent evaporation tank and ultrasonic immersion tank. With the combination of hot solvent vapor and ultrasonic agitation, oil, grease, wax and other dirt dissolved in solvent are removed. After a series of cleaning procedures, the workpiece is hot, clean and dry.

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