一种灯饰外罩的剪切与拉深旋压组合工艺

Combined process of shear and drawing spinning for a lighting cover

针对一种带有锥面与圆柱面组合形状特征的灯饰外罩,提出了采用剪切旋压结合多道次拉深旋压的组合方法进行成形,并对相应的工艺特点进行分析,为实际生产提供理论依据.研究中,通过板坯尺寸参数的计算与多道次旋轮路径的设计,确定了旋压试验方案,并在此基础上开展组合旋压的工艺试验,检验了灯饰外罩旋压件的形貌尺寸,并进一步分析了锥面与圆柱面部分的壁厚分布,发现锥面部分壁厚分布符合剪切旋压规律,圆柱面部分壁厚分布呈先小后大趋势,并揭示其原因.

Aiming at a specific type of lighting cover with the combination of conical surface and cylindrical surface,a method of shear spinning combined with multi-pass drawing spinning is proposed,and the corresponding process characteristics for the actual production are analyzed.This work provides the theoretical basis for the actual production.In the study,the spinning experiment scheme is planned through blank size parameters calculating and multi-pass roller path designing,based on which the combined spinning experiment is carried out.The morphological dimensions of the spun work-piece are tested.And the wall thickness distributions of the conical surface part and cylindrical surface part are analyzed.It is found that the wall thickness distribution of the conical surface part is correlated with the law of shear spinning,the wall thickness distribution of the cylindrical surface part shows an increasing trend.The mechanism behind the phenomenon observed is explored.