What kind of cleaning method should bearings choose?

The cleanliness of bearings is an assessment index of bearing quality, which must be guaranteed by the cleaning quality of the production process. The improvement of cleaning quality requires not only strict production management, but also the application of advanced cleaning technology to meet the cleaning requirements of products. At present, in the bearing industry, the way of bearing cleaning is mainly spray cleaning with gasoline or kerosene as cleaning medium. This way is not only high cost, high labor intensity, low production efficiency, and poor safety, more important is that this cleaning method is difficult to meet the standards of bearing cleanliness requirements. It is of great significance to seek a safer, more economical and more efficient cleaning way for the cleaning of bearing finished products.

The conventional cleaning method of bearing parts has scrub, dip, spray cleaning or high pressure spray washing, etc., the related factors are mainly cleaning agent (can use ultrasonic cleaning) performance and use requirements, workpiece structure, size, weight and material and batch size, cleaning workplace labor safety and environmental protection requirements. As an excellent new technology, ultrasonic cleaning has been paid more and more attention in bearing industry.

The cleanliness of rolling bearing has a great impact on its vibration, noise, noise and service life. Especially in the production of small low noise deep groove ball bearings, improving cleanliness is one of the keys to solve the bearing noise and abnormal sound, so the cleaning process is a very important link. Bearing cleaning in the production process is generally divided into two steps: parts (rings, steel balls, retainers, etc.) cleaning before assembly and finished products cleaning after assembly and riveting.

Determine the cleaning effect of three elements: cleaning medium (cleaning agent), cleaning process and cleaning device.

Ultrasonic cleaning agent

Ultrasonic cleaning agent introduction: Ultrasonic cleaning agent can be used to thoroughly clean the oil of various parts. To destroy the molecular structure of various lubricating oils by unique chemical action, so as to achieve the purpose of removing heavy oil dirt quickly and thoroughly.

Action mechanism of ultrasonic cleaning: Due to the powerful shock wave produced when the cavitation bubble bursts, part of the dirt layer is peeled off, dispersed, emulsified and shed under the action of the shock wave. Because of the cavitation phenomenon produced by the bubble, the gap between the dirt layer and the surface layer formed by the impact of the gap and gap penetration, because of the small bubble and sound pressure synchronous expansion, contraction, like peeling physical force repeatedly acting on the dirt layer, dirt layer by layer is stripped, bubbles continue to penetrate until the dirt layer is completely stripped. This is the cavitation second order effect. The impact of ultrasonic vibration of cleaning fluid on fouling in ultrasonic cleaning. Ultrasonic speed up the process of chemical cleaning agent to dirt dissolution, chemical force and physical force combined to speed up the cleaning process.

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2023-02-16