New technology of multi-directional loading rotary extrusion

Abstract

Aiming at the demand of precise forming of large-scale high-performance lightweight components with inner ring reinforcement, a new multi-directional loading rotary extrusion forming technology is developed, which matches the linear motion with the rotary motion and actively increases the strong shear force. Its principle is that while the blank is axially extruded and loaded, the radial force and rotating torque are increased. Through the synergistic action of axial, radial and rotating motion, the orderly flow of metal is controlled and the cumulative severe plastic deformation (SPD) of "uplift-trowel" micro area is generated, so as to realize the uniform strengthening and toughening of materials. At the same time, through the continuous deformation of punch "ellipse-circle", high reinforcement is grown on the cylinder wall to achieve the high-quality forming of cylindrical parts or inner ring reinforcement components. This technology enriches the plastic forming theory and widens the application field of plastic forming. In addition, the formed large-scale high-performance inner ring stiffened magnesium (Mg) components have been successfully verified in aerospace equipment, solves the problems of integral forming and severe deformation strengthening and toughening of large-scale inner ring stiffened components, and has a good prospect of popularization and application.