Feasibility study on finishing the inner surface of SLA small holes by volume alternating cavitation shock wave

Aiming at the technical problem of finishing the inner surface of additive manufacturing small holes, a novel volume alternating cavitation shock wave finishing (VACSWF) method was innovatively proposed. Using simulation and experiment methods, the distribution law of the vapor volume fraction in the alternating cavitation flow field of the small hole is studied, and the influence of volume alternating frequency and volume variation on the flow field is analyzed. Using the self-designed volume alternating cavitation experimental device, the inner surface of complex small holes processed by the Stereo Lithography Appearance (SLA) method was completed, and the feasibility of finishing the inner surface of complex small holes by the VACSWF method was verified. The collapse process of the volume alternating cavitation bubbles is analyzed, and the material removal mechanism of VACSWF is revealed.