Production Machining

JUL 2013

Production Machining - Your access to the precision machining industrial buyer.

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Ultrasonic Cleaning parts2clean What is the best ultrasonic frequency for each individual cleaning or degreasing job? Which plant technology will carry out the cleaning most efciently? What cleaning agent is the most suitable? Answers to these and many other questions connected with ultrasonic cleaning can be found at parts2clean. This international trade fair for industrial parts and surface cleaning will take place from October 22 to 24, 2013, at the exhibition center in Stuttgart, Germany. The range of exhibits includes machines, procedures and process media for degreasing, cleaning, deburring and preparing components and surfaces, special processes, parts cleaning baskets and produces high cleaning forces on the surface of the component. But conversely, the depth efect, which is required to penetrate interfaces such as pores, drill-holes and structures, is low. Te solution is to use variable-frequency ultrasound for workpieces with a complex geometry and/or stringent cleanliness requirements. Until recently, separate baths were required for variable-frequency cleaning. In the last few years, multi-frequency or mixed-frequency ultrasound systems have enabled the fuid to be irradiated in a single bath at several frequencies, such as 25 kHz and 40 kHz. Te mixture of larger and smaller cavitation bubbles provides optimal cleaning power both at the surface and in the interfaces, at the same time permitting design of ultrasound systems with a smaller footprint. workpiece holders, handling and process automation, QA, test methods and analytical procedures, treatment and disposal of cleaning media, clean-room technology, contract cleaning, corrosion prevention, protection, packaging, research and technical literature. The 3-day parts2clean technical forum, with simultaneous German-English/English-German translation of lectures, provides comprehensive additional know-how about industrial cleaning of components and surfaces. For more information, and details of the preliminary list of exhibitors and the program for the technical forum, visit parts2clean.com. vertically upward toward the surface of the bath, and will be refected back from the surface to the foor. Tis limited fow of the sound waves can have a negative efect on the cleaning of parts that contain cavities and blind holes. If air bubbles form in these cavities, the air acts as a barrier to the sound and no cleaning takes place. It is therefore important to ensure that all cavities are flled with cleaning fuid, Ensuring Adequate Power Te cleaning efect is also infuenced by the number and positioning of transducers in the cleaning bath. Allowing 8 to 10 watts of ultrasound power per liter of volume in the bath usually ensures adequate cleaning efect. Tus, a 100-liter cleaning bath would require an output power of 800 to 1,000 watts. If stubborn contaminants need to be removed, or if a very high degree of cleanliness is required, the ultrasound power may be even higher. Cleaning trials with original contaminated components provide a reliable determination of the required ultrasound power. Te sound waves spread out lengthwise (longitudinally) through the fuid bath from the sound-emitting surfaces, creating dead and active sound zones. Te precise arrangement of the vibration transducer elements, therefore, has a big infuence on the efectiveness of the cleaning. If vibration transducers are attached only to the foor of the work chamber or cleaning basin, the sound will be directed productionmachining.com :: 47

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