The Experiment Research On The Electromagnetically Assisted Sheet Forming Of Aluminum Fuel Tanks Shell

Recently,weight reduction of vehicles has been of great interest,and consequently,the use of low-density materials in the automotive industry is increasing every year. Electromagnetic forming(EMF) is a typical high speed forming process using the enrgy density of a impulsed magnetic field to form workpieces made of metals with high electrical conductivity like e.g. aluminum.In view of new lightweight constructions,special forming processes like EMF gain importance for associated materials.In this dissertation, the author studied the dynamical property of the aluminium alloy and steel with the SHPB and the Rotary Disk Impact Tensile technique. It is clear that the yield stress and ductile increasees with strain rate increasing . The ductile of Al-alloy is little better than that of the steel as the impact tensile test. So the Al-alloy has a good formability in high velocity.The research about the sheet metal forming with four different Aluminum alloy was done. And the main affect factors were acquired ,such as the discharge voltage ,the current in the coil and the workpiece materials. The result of the deformation curves and strain distribution is also acquired. Electromagnetic forming tests were done with different coils and settings.They were all some benefit test for the electromagnetic forming withsmall size workpiece.We have recently developed and demonstrated a method named as Electromagnetically Assisted Incremental Stamping (EAIS),for more directly controlling the distribution of forming energy in a stamping operation based on an extension of electromagnetic (EM) impulse forming.This new approach to augmenting conventional production stamping. Applying a series of lower power pulses can increase forming limits without exposing the tooling and coil to large shock loads.With this technology ,the oval-shape aluminum component with two...