International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

The analysis of stress-strain state non axis symmetric drawing process, which was developed based on an analytical model of the process. Obtained the dependencies for the components of the stress in the plastic region. The relationship between changes in the district velocity compressive stress on the peripheral area of the amount of shear stress. On this basis, it is given a numerical grade to increase the limit drawing ratio slightly different from equivalent value determined by the equality of the greatest meridional stress to the yield strength of the material at dangerous section of the blank.

The analysis of stress-strain state of the bisector of the corner of the blank at a drawing of box-shaped parts. Analytical dependences for the meridional and circumferential stress on the bisector of the angle. It is shown that an increase in the limit drawing ratio compared with an extract of the cylindrical part is a consequence of the growth in absolute value of district compressive stresses. It was found that the maximum value of the coefficient of drawing of box-shaped parts cannot exceed the value of – K=exp(1+1/√3)≈ 4,84.

Based on the analysis of the initial equations of the plastic state,established the distribution of strains in the initial and final stages of axisymmetric drawing. The dependencies to assess the accuracy of linear and diametrical sizes taking into account volumetric of strain state.

The analysis of two-layer sheet bending moment package under plane strain conditions, taking into account the strain hardening. Approximate analytical dependence for the largest radial compressive stress and the relative displacement of the radius of the neutral surface of the inner layer. The possibility of increasing the permissible degree of deformation and reduce the relative radius of curvature of the inner layer.