COMPOSITE MATERIAL CONSISTING OF TWO STEEL COVER SHEETS RESISTANCE-WELDED TOGETHER AND AN INTERMEDIATE LAYER, METHOD FOR THE PRODUCTION THEREOF AND INSTALLATION FOR CARRYING OUT SAID METHOD

摘要

The invention relates to a composite material in strip or sheet form which consists of two steel cover sheets (1, 2), which are resistance-welded via electrically conductive bodies (4), and an intermediate layer (3) which consists of a filler material. The bodies (4) are embedded into said filler. The bodies (4) are configured as lentiform disks which lie flat between the cover sheets (1, 2). Such a composite material is produced by applying in a continuous mode the filler material (3') for the intermediate layer in a paste-like condition onto a strip (1') which represents the first cover sheet (1). The lentiform disks (4') are placed on the filler material (3') and are pushed into said material in a welding gap (8) formed by two contact rollers (6, 7) of a resistance welding device by way of a strip (2') which represents the second cover sheet (2) at least until the lentiform disks and the sheets contact. The lentiform disks are substantially flattened during welding with the strips (1', 2').