In practical applications, fully automatic ultrasonic cleaning machines often face various problems such as cleaning effectiveness, ultrasonic systems, and liquid management systems. These problems not only affect cleaning efficiency and quality, but may also lead to equipment failures. The following is a detailed analysis of common problems and corresponding solutions.
In terms of cleaning effectiveness, incomplete cleaning is a prominent issue. The main reasons involve three aspects: ultrasonic frequency, cleaning agent concentration, and temperature control. Different cleaning objects correspond to different ultrasonic frequencies. If the frequencies used, such as 28kHz, 40kHz, 80kHz, etc., do not match the application scenario, the ideal cleaning effect cannot be achieved; When the concentration of the cleaning agent is lower than the recommended value of 15%, it is difficult to fully dissolve and remove dirt; If the temperature control deviation exceeds the ± 5 ℃ range required by the process, it will also affect the chemical reaction of cleaning and the cavitation effect of ultrasonic waves. A series of preventive measures can be taken to address the issue of surface damage to workpieces. For brittle materials, high-frequency cleaning methods with a frequency of ≥ 80kHz can be used to reduce damage to the workpiece while ensuring cleaning effectiveness; Adding buffer brackets can effectively reduce collisions between workpieces during the cleaning process; For precision parts, strictly control the cleaning time within 3 minutes to avoid damage caused by excessive cleaning.
Ultrasonic system failures mainly manifest in two aspects: decreased transducer efficiency and generator alarms. Impedance testing, insulation resistance testing, and amplitude testing are important methods for diagnosing the decrease in transducer efficiency. When the deviation between the impedance test result and the normal value of 50 ± 5 Ω exceeds 10%, it means that there is a problem with the performance of the transducer and it needs to be replaced; If the insulation resistance is lower than 10M Ω, the equipment should be immediately stopped to prevent safety accidents; When the amplitude detection value is less than 25 μ m, the driving circuit needs to be inspected and repaired. When the generator alarms, different codes correspond to different fault causes and handling methods. When the E01 overcurrent protection code appears, it is necessary to carefully check whether there is a short circuit in the transducer cable; E02 overheat protection code prompt: Clean the dust accumulation of the cooling fan in a timely manner to ensure good heat dissipation effect; When the E03 frequency loss lock code occurs, it is necessary to re match the resonant capacitor to restore the normal operating frequency of the equipment.
Common problems with liquid management systems include foam spillage and clogged filtration systems. Foam overflow can be controlled by various ways. Adding defoamer at the proportion of 0.1% -0.3% can effectively inhibit the production of foam; The liquid level sensor is installed and linked with the liquid replenishing system. The liquid replenishing amount can be automatically adjusted according to the liquid level change to avoid foam overflow due to high liquid level; Optimizing the spray pressure to a reasonable range of 0.2-0.5MPa also helps to reduce the generation of foam. In terms of maintenance for clogged filtration systems, primary filtration requires daily cleaning of filter screens with a mesh size of ≥ 200 to promptly remove large particle impurities; Replace the precision filter element with a precision of 5 μ m every month to ensure the filtration effect; At the same time, perform weekly floating oil discharge and ensure proper oil-water separation to maintain the normal operation of the liquid management system and guarantee the efficiency and quality of the cleaning machine.
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