| 摘要 |
Apparatus for forming a peripheral flange on a fiat disc of sheet material, particularly to make an end cover for a coil of steel strip, has support (1) for the disc which is stepwise rotatable about an axis (2) by a stepping mechanism, clamping means for clamping the disc to the support, and a shear (32) for cutting a radial slit in the circumference of the disc after each step. Bending means (34) bend, out of the plane of the disc, the area of the disc material between each adjacent pair of slits so that said areas together form the flange To avoid eccentricity of the disc, means for centering the disc on the support before clamping are provided, and comprise at least three centering elements (27, 28, 29) which are spaced apart from each other around the circumference of the disc and are connected to driving means (16, 30)) so as to be all at the same distance from the axis of rotation of the support (1) and to be all radially movable simultaneously and at the same speed so as to engage the circumference of the disc. |
