Iranian Journal of  Manufacturing Engineering

Iranian Journal of Manufacturing Engineering

Experimental investigation of ultrasonic vibrations' effect on springback in sheet metal bending process

Document Type : Original Article

Authors
Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran
Abstract
In the sheet metal bending process, springback at the end of the operation often leads to inaccuracies in the workpiece geometry. One innovative approach to reducing springback is the application of ultrasonic vibrations. In this research, an ultrasonic tool and concentrator for bending operation were designed and manufactured to investigate the effect of ultrasonic vibrations on springback. First, the concentrator dimensions were calculated using analytical relations, and numerical simulations were conducted using Abaqus software to determine the vibration node location. The resonant frequency of the constructed assembly was then measured using an impedance analyzer. Samples of aluminum Al3105 and Al6061, as well as CK65 steel, were bent both with and without ultrasonic vibrations, and the springback was measured. Experimental results demonstrated that ultrasonic vibrations reduce springback by up to 58% in steel sheets and 29% in aluminum sheets, with a more significant effect observed in materials with higher yield strength.
Keywords

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