Scraping is a key finishing method for precision slideways but depends on skilled labor and suffers low efficiency. This study develops an Ultrasonic-Assisted Scraping (UAS) tool applying 28 kHz vibration with a peak-to-peak amplitude of ≈11.4 μm to improve machinability. Conventional scraping relies on plowing with large negative rake angles, causing resistance and tearing. UAS introduces intermittent micro-impact and extrusion, effectively increasing the rake angle. Experiments on aluminum, cast iron, stainless steel, and Turcite B showed higher removal rates and better surfaces under the same thrust load. A diffraction-induced rainbow surface on aluminum confirmed micro-scale vibration transfer. Findings highlight the universal mechanism shift in UAS from plowing to micro-impact.
TSUTSUMI et al. (2025) studied this question.