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将15kHz的高频振动叠加到厚度1.0mm的5052铝板与1.2mm厚AZ31镁板的冲裁过程,以研究不同振幅高频振动对轻合金冲裁载荷以及剪切断面宏、微观形态的影响.实验发现:振动能够降低冲裁变形抗力,且降低幅度与振幅、冲裁间隙等因素有关,其中振动对5052铝板冲裁断面质量以及冲裁力的影响较AZ31镁板明显;5052铝板冲裁间隙为0.05mm时,叠加振动后宏观断口的平均光亮带宽度增加,间隙为0.15mm时,AZ31镁板的冲裁断面质量随着振幅增加反而下降;微观形态上,5052铝板韧性断裂的韧窝数量随振幅增加而减少,AZ31镁板由于主要是脆性解理断裂,振动对其断裂面的影响相对较小.
The high frequency vibration of 15kHz was superimposed on the punching process of 5052 aluminum plate with thickness of 1.0mm and AZ31 magnesium plate with thickness of 1.2mm to study the influence of different amplitude high frequency vibration on the punching load of light alloy and macro and micro morphology of the shear section. The experimental results show that the vibration can reduce the deformation resistance of blanking, and the amplitude of the blanking deformation is related to the amplitude and blanking clearance. The impact of vibration on the blanking section quality and blanking force of 5052 aluminum is more obvious than that of AZ31 magnesium; Is 0.05mm, the average bright band width of macroscopic fracture after superposed vibration increases. When the gap is 0.15mm, the punched section quality of AZ31 magnesium plate decreases with the amplitude increasing. On the microscopic morphology, the ductile fracture of 5052 aluminum plate As the amplitude increases, AZ31 magnesium plate is mainly brittle cleavage fracture, the impact of vibration on the fracture surface is relatively small.