| 摘要 |
A rail clip, for holding down a railway rail, is made by bending a metal rod so that it comprises a substantially straight leg, at one end of which is one end of the rod, the other end of the leg being joined to a part on one side of the leg which is joined to a final part on the other side of the leg, this final part terminating in the other end of the rod, near which, on the under-side, a step in the rod is formed, this having a depth no more than 2 mm. or no more than 1/4 of the thickness of the rod before it was bent. Apparatus for performing a second bending operation on a rod, which in a first bending operation has been given the shape indicated above but without the step, has support surfaces for supporting various parts of the bent rod and two shaping tools between which the final part of the rod is distorted to give it its final shape, including the step. |
