 | 2006 |
Abstract:
Electromagnetic tube compression is a high speed forming process using pulsed magnetic fields to apply radial forces to tubular workpieces with high electrical conductivity, causing a commonly symmetric reduction of the diameter with typical strain rates of about 104 sec-1. The most frequently used application of this innovative technology is in the field of joining, e.g. assembling tubular aluminum components to lightweight constructions, whereby the joints can transmit forces by dominating either force-fit or form-fit. The achievable strength of joints realized by electromagnetic forming strongly depends on the process parameters. Among these, the applied pressure pulse and the resulting workpiece velocity as well as the geometry and the material of the joining partners are significant aspects. In the present article, the influence of these parameters will be described by results of exemplary comparing experimental investigations. The quality of force-fit joints is evaluated by their strength and conclusions for the joint design are drawn.