COMPOSITE MATERIAL HAVING STAMPING AND MICRO-PERFORATION

摘要

A method includes the steps of providing a first panel of aluminium material; providing a second panel of steel material; stamping a plurality of first pimple-like bulges in the first panel; stamping a plurality of second pimple-like bulges in the second panel, wherein the arrangement of the second pimple-like bulges is congruent with the arrangement of the first pimple-like bulges; bringing together the sides of the first and second panels that are furnished with the bulges, so that the domes of each set of pimple-like bulges lie opposite each other; and clipping the first and second panels together to form a composite by ensuring that at least one tongue is broken out of each of the pimple-like bulges on the second panel and pressed into the corresponding pimple-like bulges in the first panel.