Development of residual stresses by infeed rotary swaging of steel tubes

Abstract Additionally to the achievable tight geometrical tolerances, rotary swaging can influence intrinsic material properties by work hardening and residual stresses generation. Although should be usually avoided, they used on purpose improve performance of a produced part. To find prospective process settings, 2D FEM simulation was developed revealed development distributions in E355 steel tubes whole longitudinal section. Besides closing time, also geometric features dies were varied. It found that time affects significantly at surface, but not depth By shortening calibration zone, axial tensile near outer surface could lowered, while compressive inner remained almost unaffected. applying higher die angle, increased reducing stresses. Experimental investigations performed X-ray diffraction which good agreement between results physical measurements. With these findings, optimized for shaping profiles parts.