Title: Options of cold expression of axisymmetric hollow products with the ledge on the ground part from the cavity
Abstract:The finite element method has carried out the analysis of cold traditional extrusion and extrusion with expanding of axisymmetric hollow products with a ledge on a ground part from a cavity. The elast...The finite element method has carried out the analysis of cold traditional extrusion and extrusion with expanding of axisymmetric hollow products with a ledge on a ground part from a cavity. The elasto-plastic model of metal is applied. Dependences of effort of extrusion and effort of ejection of products from a matrix depending on movement of the deforming tool are established. Distributions of specific efforts on the contacting surfaces at the maximum value of effort of deformation are defined. Extrusion with expanding leads to decrease in effort of deformation by 13% and specific efforts on a punch, a matrix and the ejector. At extrusion with expanding shaping of a ledge on a ground part happens at smaller effort. Temperature of deformed metal at cold shaping is determined. The final deformed condition of preparations, a form and the sizes of products taking into account elastic deformation after ejection from a matrix are defined. All parameters for development of technology – effort and work of deformation for the choice of the press equipment, specific efforts for design of the die tooling, a form, the sizes of products and intensity of deformations for assessment of quality of products and forecasting of mechanical properties of deformed metal are set.Read More