Research on Forming Limit of 1060 Aluminum Sheet in Ultrasonic Vibration-assisted Single Point Incremental Forming

Deficiencies in formability and forming quality are the key factors to restrict the wide industrial application of single point incremental forming (SPIF) technology. Ultrasonic vibration is introduced into the single point incremental forming process to increase the forming limit of a material by changing its deformation mechanism. For 1060 aluminum sheet, the effects of vibration amplitude and frequency on the constitutive relation of material are analyzed. And the sidewall forming angle of a cone frustum part is taken as a measure standard. The influences of ultrasonic vibration parameters on the forming accuracy are studied through numerical simulation and experiment. The results show that the formability of 1060 aluminum sheet can be significantly changed by applying ultrasonic vibration, and the single point incremental forming limit and the forming quality can be improved under the conditions of 120 W and 25 kHz. © 2019, Editorial Board of Acta Armamentarii. All right reserved.