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

Abstract

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.

Keywords:

• Finishing
• inner surface of the small hole
• material removal mechanism
• SLA
• volume alternating cavitation shock wave

Disclosure statement

The authors declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.

Additional information

Funding

This study was funded by the financial support of the National Natural Science Foundation of China [51575245, 52105259], Natural Science, Talent Foundation of Jiangsu Province [2014-23], Key Project of Jiangsu Province [BE2015134], the Six Talent Peak Selection and Training Program of Jiangsu [XNYQC-002], Jiangsu University Senior Talent Start-up Funds [16JDG038], Equipment Pre-Research Field Fund Project [80923010201], the opening foundation of the State Key Laboratory of Space Medicine Fundamentals and Application, Chinese Astronaut Research and Training Center [SMFA20K07].