| 摘要 |
The present invention concerns a method and tools for forming sheet metal, and in particular, a method for making a chase top from a stock rectangular piece of sheet metal. Creasing tools are described that each have a handle member and a creasing wheel suspended therefrom cooperates with a support lip to form first and second crease lines and first and second flange areas along each perimeter edge of the workpiece. A reinforcing ridge tool is shown having a handle member with a wheel rotatively suspended therefrom is used to indent the sheet metal along desired lines inwardly of the crease lines to form reinforcing ridges. A bending tool is described having cooperating bending members for clamping the workpiece along each second crease line for bending the workpiece there along to from vertical wall portions.
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