Technology and equipment for friction stir preweld edge preparation

Introduction. Friction stir welding is widely used due to certain advantages of this method. Factors that reduce the strength joints made high-strength aluminum alloys are considered. When flat sheets, an effective way increase weld edge thickening. The paper proposes a method for such A device developed, calculations and experiments carried out. Materials Methods. Laboratory equipment has been developed provide simultaneous thickening two edges be welded. main component steel roller, which rolled along blanks thickens them plastic deformation. same setup can friction process. To calculate geometry thickened parameters deforming roller depending on value settlement, mathematical model based contact problem elastic (roller) elastoplastic (blank) bodies with bilinear hardening law developed. three-dimensional simplified geometric facility account its symmetry constructed. On surfaces, special finite elements were selected element mesh was refined. numerical implementation out in ANSYS package. Results. theoretical provides assessing stress-strain state interacting elements. basis model, calculated, defined. Using laboratory equipment, full-scale experimental results confirm adequacy it. possibility adjusting size shown. Discussion Conclusion. technology obtaining places welds proposed. It will metal consumption structures ensure bearing capacity welded not lower than similar characteristics base metal. process experiment providing selection