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金属塑性成形后的应变特征影响零件的力学性能和使用寿命。电磁成形技术能提高金属的成形性,有助于克服铝合金室温成形性低的缺点,因而得到重视。本文以2024-T3航空铝合金板为研究对象,开展了电磁V弯成形和传统机械V弯成形的实验及数值模拟,研究了2种成形方法对弯曲成形试件V形弯曲圆角位置沿试件长度方向的应变特征的影响。数值模型表明,电磁V弯试件弯曲圆角处的拉应变峰值低于机械V弯试件;电磁V弯实验件的拉应变峰值比机械V弯试件低13.9%。同时,与机械V弯试件相比,电磁V弯试件有更大区域的金属材料参与了弯曲变形。
Strain characteristics after metal plastic forming affect the mechanical properties and service life of the parts. Electromagnetic forming technology can improve the metal formability, helps to overcome the shortcomings of aluminum alloy low formability at room temperature, and thus attention. In this paper, 2024-T3 aviation aluminum alloy plate as the research object, carried out the electromagnetic V-bend forming and conventional mechanical V-bend forming experiments and numerical simulation of two kinds of forming methods for bending the specimen V-shaped bending fillet position along the test The length of the strain characteristics of the impact. The numerical model shows that the peak value of tensile strain at the bending radius of the electromagnetic V-bend test specimen is lower than that of the mechanical V-bend test specimen. The peak value of tensile strain of the electromagnetic V-bend test specimen is 13.9% lower than that of the mechanical V-bend test specimen. At the same time, compared with the mechanical V-bend test piece, the metal material with a larger area of the electromagnetic V-bend test piece is involved in the bending deformation.