The Elastostatic Pressing and Rotary Forging of High-Density Sintered Products Technology

The article is devoted to the development of the technology of elastostatic pressing of precise profiled blanks of powder materials for subsequent cold rotary forging of high-density sintered products of complicated shape. The analyze of the existing combined processes of elastostatic pressing and the classification of result products are presented. The purpose of this study is to model the process of elastostatic pressing using the method of finite elements in the ABAQUS program using the Drucker-Prager model and to predict the behavior of the powder material and selected the loading scheme to achieve the required part geometry. An original device is presented for the subsequent local deformation of the cold rotary forging of the product after sintering in order to ensure a high density of the product, which simultaneously reducing the non-uniformity of the bushing and flanged parts of the finished product to 3–4%. The proposed technology minimize cost due to the possibility of utilizing the universal equipment and tools for its implementation, as well as the replaceable elastic inserts for elastostatic pressing, which could be recommend for use in small-scale production. It is shown that this technology allows be effectively used in the manufacture of high-density sintered parts such as step bushings, bushings with a flange, along with well-known combined technologies.