EFFECT OF TECHNOLOGICAL ERRORS ON FORCE PARAMETERS OF PIPES COLD ROLLING

The results of numerical experiments on studying of influence of technological errors on the vertical and horizontal forces of rolling are given. A full factorial computational experiment was performed by varying factors: initial wall thickness variation of pipes, feed and friction factor. The regression equations were obtained by the vertical and horizontal forces from these factors. It was found that the force values obtained when the maximum values of the factors are much higher than the values obtained at minimum values of factors: the vertical force varies by more than 2 times, and the axial force – more than 8 times. It was concluded that the errors of setup rolling parameters can cause a multiple increase in the forces of rolling, especially, in the horizontal component. Therefore, for stable rolling mills operation the observance of procedures discipline and control the initial wall thickness variation of pipes are necessary.