DEVELOPMENT OF ENERGY AND RESOURCE SAVING TECHNOLOGIES OF PROCUREMENT PRODUCTION

Abstract

The article presents the results of development and research of energy- and resource-saving low-waste technologies of pressure metal processing (OMT). When developing OMT processes, it is important to expand the technological capabilities of low-waste production of parts of complex shape. This is facilitated by the development of local deformation processes. The purpose of this study is to improve the quality of parts, save material, energy and labor resources based on the development of the calculation and design of rolling stamping and rolling processes with an assessment of the deformability of the material of the workpieces. For this purpose, a method was developed for calculating rational routes in the design of stamping and rolling processes, which provides: a reduction in the cost of production due to a reduction in the power of the equipment, the number of transitions and the elimination of scrap from destruction; improving the quality of products due to the formation of a favorable microstructure of the material, reducing the anisotropy of mechanical properties and limiting the resource of plasticity. It is shown that the accuracy of the dimensions of the workpiece after local deformation depends on the technological scheme, the accuracy of the dimensions of the tool and its setting, and the roughness of the surface of the product depends on the technological scheme, the roughness of the tool and the quality of lubrication. When stamping by rolling and rolling, the accuracy of the dimensions of the product is ensured according to quality 7-11, and the roughness of the surfaces, if the technological requirements are met, is μm. On the example of reshaping by stamping and rolling of square sheet blanks into round ones, it was proven that the degree of planar anisotropy decreased by 70-80% and the relative drop in yield strength in the plane of the sheet from 0.10-0.15 to 0.03-0.05, as well as an increase in ultimate deformation for tension by 8-10% and ultimate uniform deformation by 5-8%. When drawing cylindrical products from reshaped blanks, the size of the festoons decreases by 2-2.5 times, and the size of the ultimate degree of drawing increases by 10-15%. At the same time, the relative difference in wall thickness along the perimeter of the elongated workpiece decreases, and the decrease in wall thickness along its height becomes linear.