CPC B21J 5/022 (2013.01) [B21J 13/02 (2013.01); B23K 1/0008 (2013.01); B32B 3/266 (2013.01); B32B 15/01 (2013.01); B21K 7/12 (2013.01)] | 20 Claims |
1. A manufacturing method, comprising:
forming a plurality of first apertures in a first plate to provide an apertured first plate, the apertured first plate comprising first plate metal; and
bonding a first sheet to the apertured first plate to form a first grid structure, the plurality of first apertures extending through the apertured first plate to the first sheet, and the first sheet comprising first sheet metal;
wherein the apertured first plate has a plate vertical thickness, and the first sheet has a sheet vertical thickness which is smaller than the plate vertical thickness.
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