公开(公告)号：US3983737A

公开(公告)日：1976-10-05

申请号：US562274

申请日：1975-03-26

申请人： Per Ake Malmgren

发明人： Per Ake Malmgren

IPC分类号： B21K1/44 ,  B21K1/72

CPC分类号： B21K1/72 ,  B21K1/44 ,  Y10T29/19

摘要： Method of manufacturing a suspension bolt, the bent part of which has a bending strength corresponding to the tensile strength of the shank of the bolt, using commercial round iron and making the bolt from one single round work piece. In a first step the round work piece is cold bent to form an end for the hook part in the shape of a closed, oval ring, the largest part of which extends laterally to the longitudinal direction of the shank. In a second step the material of said ring is pressed or rolled, also by cold working, perpendicularly to the plane of the ring and up to the straight part of the shank, so that the section of the work piece in the pressed part becomes almost rectangular. In a third step the end of the ring is skewed laterally perpendicularly to the plane of the ring, so as to form an opening sufficient for engaging the line, the chain or any other attachment means intended to carry the loading.

摘要翻译： 制造悬挂螺栓的方法，其弯曲部分具有与螺栓的柄的拉伸强度相对应的弯曲强度，使用商业圆形铁，并且从一个单个圆形工件制造螺栓。 在第一步骤中，圆形工件被冷弯以形成钩形部分的端部，其形状为封闭的椭圆形环，其最大部分横向延伸到柄的纵向方向。 在第二步骤中，所述环的材料也通过冷加工而垂直于环的平面压直或卷起，直到柄的直线部分，使得压制部分中的工件的部分变得几乎 长方形。 在第三步骤中，环的端部垂直于环的平面倾斜，以便形成足以接合用于承载负载的线，链条或任何其它连接装置的开口。