Due to the principle of ultrasonic cleaning being cavitation effect, its performance verification is primarily focused on the cavitation effect, with the aim of examining whether there are blind spots in the sound field intensity inside the cleaning tank.

Method 1: Aluminum foil corrosion method

Fix the 20-30 μ m thick aluminum foil on a bracket and place it straight into the cleaning tank without touching the bottom. After being turned on for a period of time, the degree of corrosion on the surface of the aluminum foil can indirectly reflect whether the ultrasonic intensity at that depth is uniform. If you want to detect the spread of ultrasonic intensity in the horizontal direction, you can place the aluminum foil horizontally. According to the manufacturer's manual, if there is a>; A blank area of 1 square inch (6.45cm2) is the cold spot.

This method is intuitive and simple, but cannot be quantitatively tested, with significant errors. It is difficult to achieve testing under loading conditions and may react chemically with alkaline cleaning agents. Sometimes the whole piece may fall off, so it is necessary to set the timing of the ultrasound.

Method 2: Glass slide washing method

Using HB pencil to alter glass slides every week, ultrasonic cleaning within 3 minutes is considered qualified, and the results are recorded (IAHCSMM Reeducation Training Manual 2006, USA).

This method is easy to operate, but cannot be quantitatively tested, resulting in significant errors.

Method 3: Starch Potassium Iodide Reaction Method

After processing the starch, it was used as a photosensitive emulsion and applied onto a glass slide. The slide was then placed in a water tank containing dilute iodine solution for ultrasonic treatment. Under the effect of ultrasonic cavitation, iodine reacts with starch to turn blue, causing the slides to change color. The slides are taken out and washed, dried, and the discolored areas are investigated to infer the dispersion of the sound field.

This method can compensate for the disadvantage of aluminum foil damage in the aluminum foil corrosion method, but it cannot be quantitatively tested.

Method 4: Dyeing Method

Equip dye (such as methylene blue dye) in water, place copperplate paper in water and sonicate. Under the effect of ultrasonic cavitation, the dye will adhere to the paper. Remove the paper and wash it dry to investigate the dye painting on the paper background, which is used to evaluate the dispersion of the sound field. If the coating is unevenly distributed, it indicates uneven sound field and the presence of cold spots.

Method 5: Ultrasonic Energy Bottle Testing

SonoCheck ultrasound energy bottle can be used to verify the cavitation ability of ultrasound, and the time required for color change is proportional to the cavitation ability of ultrasound (IAHCSMM Reeducation Training Manual, USA)

2006). According to the volume of the sink, arrange points in different directions, place energy bottles, and investigate the time of color change.

This method is intuitive and concise, but it is also a qualitative measurement.

Method 6: Ultrasonic Energy Analyzer

Directly inserting into the solution can quantitatively detect the intensity of ultrasonic energy and the dispersion of ultrasonic energy density.

In practical work, both the above methods and the two methods introduced in the previous text can be used as monitoring methods for the department itself, with both advantages and disadvantages. Ultrasonic cleaning machine is just one step in the cleaning process, and our policy is to ensure cleaning quality. Therefore, the establishment, optimization, and compliance of the process are also essential.

Article source: Jiangmen Ultrasonic Cleaning Machine http://www.kpzfcsb.com/