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为有效消除叠层件之间由于制造误差、定位误差、钻削力等因素产生的初始间隙和制孔间隙,提出预联接工艺优化方法,预联接件的紧固作用可有效消除叠层间隙,抑制毛刺生长.通过建立蒙皮和边梁之间的预联接有限元简化模型,在不考虑压紧力的情况下,研究不同预联接件数量、安装位置以及预紧力条件下的叠层残余间隙和制孔间隙,给出最优预联接工艺方案,通过机器人自动化制孔系统进行实验,验证了该优化方案的正确性和有效性.实验结果表明,随着预紧力的增大,叠层毛刺尺寸先明显减小后小幅增大,较优的预联接件数量和安装位置可优化叠层件的接触刚度,有效减小毛刺尺寸.
In order to effectively eliminate the initial gap and the hole gap caused by factors such as manufacturing error, positioning error, drilling force and other factors, the pre-coupling process optimization method is proposed. The pre-coupling effect can effectively eliminate the lamination gap, And suppress burr growth.By establishing a simplified finite element model of pre-coupling between skin and side beams, the stack remnant under different pre-coupling number, installation position and pre-tensioning force is studied without considering the pressing force The gap and the clearance of the hole, the optimal pre-connection process is given, and the robot’s automated hole making system is used to verify the correctness and effectiveness of the optimization scheme.The experimental results show that with the pre-tightening force increasing, Layer burr size first decreased slightly and then increased slightly better pre-connector number and installation location can optimize the laminated parts of the contact stiffness, effectively reducing the burr size.