Oscar Samuelsson & Isak Tillberg present their master thesis project

Program: Maskinteknik
Examiner: Christer Persson, IMS
Supervisor: Adam Skagius (Volvo Cars)
Opponents: John Svensson & Carl Laurin

Abstract

The subframe is a large component in a car and is therefore important for meeting the cost, weight and sustainability targets. A cost-effective aluminium subframe is therefore interesting for future use. The joining of high-pressure die casted components and extruded aluminium beams was investigated in order to develop a geometrically complex and lightweight subframe. A literature study on possible joining methods and alternative casting processes were carried out and then possible design of joints were illustrated in the report. Mechanical testing of welded joints between components of different die-casting processes and extruded aluminium was conducted. Adhesive bonding, flow-drill screwdriving, combining adhesive and flow-drill screwdriving, MIG-, TIG- and laser welding were recommended for continuing research.