| 摘要 |
A method of fabricating a metal step shelf tray that has a series of trays at stepped elevated heights. The method includes providing a planar sheet of stainless steel and cutting a planar blank from the sheet. The planar blank includes a number of tray panel sections spaced from each other, a riser panel section between adjacent pairs of tray panel sections, and a pair of side panel sections extending out from opposite sides of each tray panel section. The planar blank may further include end riser sections extending from the free ends of the planar blank, and lower lip sections extending out from each of the side panel sections. The planar blank is then formed by a series of bending operations where the lower lip sections are directed perpendicular to their adjacent side panel sections; and the side panel sections, rise panel sections, and end riser sections are directed perpendicular to their adjacent tray panel sections. The bending operations result in a bent blank with a number of linear abutting edges of adjacent side and riser panels that are then welded together by TIG welding.
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