Experimental investigation on longitudinal torsional ultrasonic vibration milling for cortical bone

Abstract

Efficient bone milling processes, producing high-quality machined surfaces, are crucial for enhancing arthroplasty surgery. This study introduces a novel Longitudinal Torsional Ultrasonically Vibration Milling (LTVUM) technique and conducts a comparative analysis with Conventional Milling (CM). The reduction in average milling force observed during the LTVUM process was systematically recorded. Orthogonal experimental analysis focusing on milling orientation, rotational speed, and feed velocity revealed that LTVUM diminishes the influence of orientation and rotational speed, while amplifying the impact of feed velocity. Subsequent response surface methodology experiments further demonstrated that LTUVM significantly augmented the impact of integrated parameters related to feed velocity. Moreover, LTVUM was found to improve machining surface quality and alter the shear mode. These results have profound implications for the theoretical exploration of LTVUM, supporting the design and development of innovative tools for arthroplasty surgery.