Experimental Study on Optimizing Process Parameters in Two-Dimensional Ultrasonic Rolled Extrusion

Abstract

Two-dimensional ultrasonic vibration was introduced into common rolled extrusion, effect of the process parameters including tool head radius, feed speed, preload and spindle speed on the 45 steel shaft surface roughness were analyzed through orthogonal experiments. Experimental results show that lower value of surface roughness may be obtained in the process of two-dimensional ultrasonic rolled extrusion than that of common rolled extrusion, and the influence order of process parameters on surface roughness is feed speed, spindle speed, preload and tool head radius; the influence curves of tool head radius and spindle speed on surface roughness are concave curves, and influence curves of feed speed and preload on surface roughness are convex curves, or optimizing process parameters exist. The empirical formula for surface roughness is given using multiple regression analysis based on the experimental results. This study will provide a new technique for finishing precision parts.

Numerical Design of Stepped Compound Horn with Longitudinal-Torsional Vibration under Single Acoustic Excitation

“…With the development of power ultrasound, ultrasonic machining with compound vibration mode has received much attention from researchers in recent years. And ultrasonic machining with elliptical vibration or longitudinal-torsional vibration (LTV) has been successfully applied in production [1][2][3]. For rotary ultrasonic machining, better machining quality and efficiency may be obtained if LTV is applied to the tool.…”