最近我们碰到一批加工空心薄壁铝、铜件的位移。零件有同心要求,需要掉头车,用简单的心轴以内孔定心,靠零件本身螺纹连接。车加工后零件很难往下卸。我们采用了如附图所示的土办法,在一根小木棍上钉上 Recently, we encountered a number of hollow-walled processing of thin-walled aluminum, copper displacement. Parts have concentric requirements, need to turn the car, with a simple centering bore hole, threaded parts by itself. After machining parts is difficult to unload. We used the native method shown in the attached figure to nail on a wooden stick