引线框架用铜合金材料弯曲回弹有限元分析
Numerical Simulation of Springback of Copper Alloy for Lead Frame
张国军， 苏娟华
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作者单位：（河南科技大学 材料科学与工程学院，河南 洛阳 471003）
中文关键字：引线框架； 铜合金； 弯曲回弹； 有限元分析
英文关键字：lead frame; copper alloy; bending springback; finite element analysis
中文摘要：阐述了引线框架材料在国内外的研究与发展现状，着重分析了铜合金材料的弯曲回弹量。利用三维软件建立弯曲模型，然后在模拟软件中进行模拟，进行计算和必要的后处理后，最后根据有关数据计算出四种铜合金材料的弯曲回弹量的大小，得出四种铜合金材料CuFeP、CuCrSnZn、CuCrZrMg、CuNiSi的回弹量由大到小顺序排列为：CuCrZrMg、CuNiSi、CuFeP、CuCrSnZn，表明四种引线框架铜合金材料的弯曲性能依次增大；铜合金框架材料的最小弯曲半径越小，其回弹量越小。
英文摘要： The research and development status of materials for lead frame abroad and in China was described, then the springback amount of copper alloy was discussed. The bending model was built by 3-D modeling software, which was simulated and calculated in simulation software, then the necessary post-processing was made, finally, according to the data, the bending springback amounts of the four kinds of copper alloy materials were calculated. The conclusion is that, from larger to little, the order of springback amounts of the four kinds of materials for lead frame is CuCrZrMg alloy, CuNiSi alloy, CuFeP alloy, CuCrSnZn alloy, it is verified that the bending properties of the four kinds of materials for lead frame increase in turn, the smaller the minimum bending radius of copper alloy for lead frame, the smaller the springback amount.