Improvement of the ultrasonic cleaning machine (Field support for the addition of fine bubble generation system)

The Ultrasonic System Research Institute has released a technology that applies measurement, analysis, and control techniques related to the propagation state of ultrasound to alleviate the surface residual stress of ultrasonic transducers using an ultrasonic and microbubble generation liquid circulation system. This technology for alleviating surface residual stress enables improvements in fatigue strength against metal fatigue. In particular, by considering the guided waves (surface elastic waves) of the target object in the propagation state of ultrasound, we have developed a method to realize effective ultrasonic irradiation conditions through settings, tooling, and control. We have confirmed a wide range of effects on various types of metal parts, resin parts, and powder materials. Ultrasonic Probe: Overview Specifications - Measurement Range: 0.01 Hz to 200 MHz - Oscillation Range: 1.0 kHz to 25 MHz - Propagation Range: 0.5 kHz to over 900 MHz (analysis confirmation of sound pressure data) - Materials: Stainless steel, LCP resin, silicon, Teflon, glass, etc. - Oscillation Equipment: Example - Function Generator - Measurement Equipment: Example - Oscilloscope

Technology for stably utilizing fine bubbles with a spherical size of 20μm or less—nano-level cleaning method that controls acoustic flow of ultrasound— 1-1. Basics of Ultrasound 1-2. Propagation Phenomena of Ultrasonic Vibration 1-3. Fine Bubbles (Microbubbles) *Properties of Microbubbles* 1) Bubbles of about 10μm rise slowly over approximately 3 hours to a height of 1m. 2) The generated bubbles exist independently without coalescing, resulting in excellent dispersion. 3) They have the property of slowly rising in water and adsorbing tiny debris to bring it to the surface. ... 13) The negative potential depends on the pH of the water. 14) Microbubbles have excellent scattering characteristics for ultrasound. 15) Microbubbles collapse as a resonance phenomenon when exposed to ultrasonic irradiation. These properties are expected to be further elucidated in the future, but currently contain many unknown aspects. Propagation Characteristics of Ultrasound 1) Detection of Vibration Modes (Changes in Self-Correlation) 2) Detection of Nonlinear Phenomena (Changes in Bicoherence) 3) Detection of Response Characteristics (Analysis of Impulse Response) 4) Detection of Interactions (Analysis of Power Contribution Rate)

The Ultrasonic System Research Institute provides consulting services for the manufacturing and development methods of ultrasonic cleaning machines using a "degasification fine bubble (microbubble) generation liquid circulation device" that can efficiently control ultrasonic waves. "Degasification Fine Bubble (Microbubble) Generation Liquid Circulation Device" 1) By narrowing the intake side of the pump, cavitation is generated. 2) Cavitation causes bubbles of dissolved gas to form. The above describes the state of the degasification liquid circulation device. 3) When the concentration of dissolved gas decreases, the size of the bubbles formed by cavitation becomes smaller. 4) Through appropriate liquid circulation, fine bubbles (microbubbles) smaller than 20μ are generated. The above describes the state of the degasification fine bubble (microbubble) generation liquid circulation device. 5) When ultrasonic waves are applied to the above degasification fine bubble (microbubble) generation liquid circulation device, the ultrasonic waves disperse and crush the fine bubbles. When measuring the fine bubbles, the distribution of ultrafine bubbles becomes greater than that of fine bubbles. The above state indicates that ultrasonic waves can be stably controlled.

Ultrasonic Cleaning (Control of Nonlinear Phenomena) Technology 1. Introduction This section introduces technologies that utilize the effects of acoustic flow related to ultrasound. Regarding ultrasonic cleaning, "The most important (effective) factor is acoustic flow." 2. What is Acoustic Flow? A flow occurs near the surface of the cleaning object placed in the ultrasonic cleaner. This flow is called acoustic flow. ... Propagation Characteristics of Ultrasound 1) Detection of Vibration Modes (Changes in Autocorrelation) 2) Detection of Nonlinear Phenomena (Changes in Bicoherence) 3) Detection of Response Characteristics (Analysis of Impulse Response) 4) Detection of Interactions (Analysis of Power Contribution Rate) Note: "R" is a free statistical processing language and environment. autcor: Function for analyzing autocorrelation bispec: Function for analyzing bicoherence mulmar: Function for analyzing impulse response mulnos: Function for analyzing power contribution rate