Detailed Project 2

Vibro-Tumbling technique is a combination of vibratory finishing and tumbling technologies that was developed and being used at our service. Initially built and proposed by Yu Goulong in 2013 at INFN-LNL VT technique showed promising results on the 6 GHz cavities. In 2019, when it was proposed to restart research activity on that technique. The idea of the VT is the combination of the vibrational energy with continuous rotation. Internally placed abrasive plays a significant role in surface preparation. Random movements of the abrasive media attacks/scratch the surface in the presence of the liquid media. The complexity of the process is that the internal volume of an elliptical cavity is always limited, and so the media is always the same. In this difficult situation, after a number of research tests, it was achieved 2 g/h (for 6 GHz cavity – 23 um/h) removal rate. VT is able to overperform conventional tumbling cutting speed by an order of magnitude. At the same time, it was developed fine vibratory polishing – achieving a reflective surface with an organic abrasive media or with colloidal system.

Benefits of Vibro-Tumbling over tumbling and CBP:

1. Better cutting performance.
2. Easily scaling technique.
3. Low quantity-media environment.