LISI GROUP - Integrated report 2020

LISI — 2020 INTEGRATED REPORT 37 LISI AUTOMOTIVE / WEIGHT REDUCTION / MULTI-MATERIAL ASSEMBLIES LISI HOLLOWELD ® : 2.5 G FOR A DURABLE BOND OF ALUMINUM AND STEEL The weight reduction of vehicles is a priority for car makers and equipment suppliers. After reducing the thickness of the steel sheets, the strength of which is constantly increasing, the combination of materials of different densities is a major axis of research. The assembly of materials that are non-weldable together generally requires the implementation of light and mechanically strong intermediate parts. The LISI HOLLOWELD ® hollow weld pin weighs no more than 2.5 g and allows can punch the hardest aluminum alloys (400 MPa) and then weld them by electrical resistance onto another steel sheet, with a mechanical strength exceeding 1,200 kg per point. LISI AUTOMOTIVE / WEIGHT REDUCTION / MULTI-MATERIAL ASSEMBLIES / RECYCLABILITY THE EBS SCREW: THE REMOVABLE MULTI-MATERIAL SOLUTION With its new cutting-edge geometry, the fluorescent EBS tapping screw helps to punch a stack of different metal sheets forming a tapping with an ISO profile through plastic deformation. This removable solution makes it possible in particular to assemble steels and aluminum alloys, or aluminum alloys together, while guaranteeing the recyclability of the materials. LISI AUTOMOTIVE / WEIGHT REDUCTION INNOVATIVE ANTI-CREEP SOLUTIONS The weight reduction of fastening systems also involves replacing the fasteners initially developed in steel with plastic or metalloplastic fasteners designed using digital simulation in order to obtain equivalent mechanical resistance. To avoid crushing them during installation by screwing, they are equipped with one of the anti-creep solutions developed by LISI AUTOMOTIVE. Weight reduction