针对实验法选择合适压紧力时间周期长、成本高的问题,分析叠层薄壁工件层间毛刺的产生原理,利用简化的梁模型研究压紧力对层间间隙的影响.根据层间毛刺和层间间隙的关系,融合有限元仿真和函数拟合,提出基于有限元的压紧力理论预测方法,以实现制孔压紧力的快速准确预测.采用理论预测的压紧力进行2024叠层铝板制孔实验.研究结果表明:构建的层间毛刺高度模型预测误差在10％以内,实验孔的层间毛刺高度小于0.1 mm,达到"无毛刺"的制孔要求,为自动化制孔压紧力的选择提供了理论参考.%To solve the problem of the long time and high cost of clamping force selection by experimental method, the interlayer burr forming theory of thin-walled workpieces was analyzed and the influences of clamping force on the interlayer gap by a simplified beam model were explained. According to the relationship between interlayer burrs and the interlayer gap, a clamping force prediction method was proposed, which was based on the finite element simulation and function fitting to achieve a fast and accurate prediction for clamping force. The predicted clamping force was used in 2024 laminated aluminum plate drilling experiments. The results show that the error of the prediction model of the conducted interlayer burr height is less than 10％, and the interlayer burr height of experimental hole is less than 0.1 mm, which can meet the quality requirements of drilled holes and provide a theoretical reference for clamping force selection.
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