公开(公告)号：US5341665A

公开(公告)日：1994-08-30

申请号：US850294

申请日：1992-03-12

申请人： Bernard G. Christophel ,  Jean M. Dautremont ,  Pierre H. Fert ,  Guy R. Harmegnies

发明人： Bernard G. Christophel ,  Jean M. Dautremont ,  Pierre H. Fert ,  Guy R. Harmegnies

IPC分类号： B21D5/14 ,  B21D51/10 ,  B23K37/00

CPC分类号： B21D5/143 ,  B21D51/10

摘要： The process and apparatus of the invention permits the production of annular parts, such as ferrules, on which machining operations are to be carried out. The process includes the steps of bending a predimensioned metal sheet by a series of internal supports mounted on a rotary plate and by a pressure roller bearing on the outer surface of the sheet. One complete rotation of the rotary plate makes it possible to completely bend the sheet into the form of a ferrule. The second main operation includes carrying out of a welding operation on the two ends of the metal sheet. This process makes it possible to carry out any random prior machining operation on the predimensioned flat metal sheet, without the machining operations being impaired by the bending or welding operation. The process is applicable to the production of front ferrules for casings surrounding the coldest pipe of a double flow turbojet engine.

摘要翻译： 本发明的方法和装置允许生产将在其上执行加工操作的环形部件，例如套圈。 该方法包括通过安装在旋转板上的一系列内部支撑件和在片材的外表面上的压力滚子轴承来弯曲预定金属片的步骤。 旋转板的一个完整的旋转使得可以将片材完全弯曲成套圈的形式。 第二主要操作包括在金属片的两端进行焊接操作。 该过程使得可以在预先拉伸的平板金属板上执行任何随机的现有加工操作，而不会由于弯曲或焊接操作而损害加工操作。 该方法适用于生产用于双流涡轮喷气发动机的最冷管周围的壳体的前套圈。