Možnosti využitia technológie termálneho vŕtania na účely spájania tenkostenných nerovnakých materiálov v automobilovom priemysle

Abstract

The article deals with the study of the applicability of flowdrill technology for the formation of joints between thin metallic materials based on iron and aluminium alloy. This technology is primarily used to create holes in profiles with a local increase in material thickness to accommodate a greater number of threads. If used to drill two interleaved thin-walled materials, a joint is formed as a secondary effect. The quality of the resulting bushings forming the interference fit joint was investigated. The joints were formed using a combination of uncoated deep drawn steel, galvanized HSLA steel and aluminum alloy, in different positions in the joint. Subsequently, tensile shear testing of single joints was performed. The load carrying capacity of the joints was also tested in combination with adhesive bonding. The load capacity of the joints combined with bonding was significantly higher compared to flowdrill joints. The combination of both technologies yields an increase in the absorbed energy of the joint at failure.