制孔质量约束的铝合金薄壁叠层结构单向预压钻孔工艺研究

Study of One-Side Pressed Drilling Process of Aluminum Alloy Thin-Walled Laminated Structure

进行了铝合金薄壁叠层结构单向预压紧钻孔试验,利用方差分析法研究了钻孔参数对孔圆柱度、夹层毛刺等影响的显著性。以零件的变形量为基础建立单向预压情况下钻孔圆柱度的计算模型。分析了钻孔出口毛刺形成机理以及预压力对夹层毛刺的抑制作用。通过算例,验证了叠层零件变形量计算模型的正确性和孔圆柱度计算模型的可靠性。最后,综合考虑孔圆柱度、夹层毛刺高度、效率等因素提出了工艺决策建议。

Drilling experiments for thin-walled aluminum alloy laminated structures are carried out considering the one-side press. The method of variance analysis is used to study the cylindricity and burr in the laminate. The cylindricity predicting model is proposed based on the deformation of the workpiece. The mechanism of the burr formation and the relationship between the laminated gap and burr are discussed. The deformation of the workpiece under one-side press and the cylindricity predicting model are verified by a example. Finally, the suggestion about process decision considering the cylindricity, burr and efficiency is proposed.