Analytical Model of Ultrasonic Vibration Single Point Incremental Forming Force

doi:10.3901/JME.2019.02.042

Abstract

Abstract: The excessive forming force has been one of the main problems in the development of single point incremental forming technology (SPIF). Therefore, ultrasonic vibration is introduced into SPIF to reduce the force. The working principle and moving rule of ultrasonic vibration single point incremental forming technology (UV-SPIF) are analyzed to quantitatively reveal the mechanism of reducing the force of UV-SPIF. The spherical coordinate stress equilibrium equation is established by taking the sheet microelement as the analysis object. The each stress is integrated on the forming interface. The stress condition of the deformation area is revealed and the expression is analyzed. An analytical model for the force of UV-SPIF is constructed to obtain the influence rule of the vibration parameters and process parameters on the force. In addition, the analytical model is verified by experiments. The ultrasonic vibration spindle and the clamping system are developed. Force test system of Kistler is built. Experiments show that the ultrasonic vibration can effectively reduce the force. At the same time, the frequency and amplitude of the appropriate range will make the force reach a minimum. In addition, the influence laws of the vibration parameters and process parameters on the force are consistent with the theoretical calculation results, and the validity of the analytical model is verified. A theoretical and technical basis is provided for in-depth analysis of the influences of ultrasonic vibration on single point incremental forming force.

Key words: analytical model, experimental verification, force, single point increment forming, ultrasonic vibration

CLC Number:

TG386

BAI Lang, LI Yan, YANG Mingshun, YAO Zimeng, YAO Zhiyuan. Analytical Model of Ultrasonic Vibration Single Point Incremental Forming Force[J]. Journal of Mechanical Engineering, 2019, 55(2): 42-50.

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