Model tests of the ring rolling process

摘要

Manufacturing of rings rolling method is among the most spectacular and most kinematically advanced metal forming processes. Developed ring forming technologies are very valuable and constitute the know-how of their respective companies, which are not made available or published. Currently, manufacturing of forged and rolled rings involves rolling rings with simultaneous profiling of side surfaces, particularly with the application of lightweight materials. This article is an introduction to research concerning the development and verification of the process of rolling rings from EN AW - 7075 aluminum alloy. This article presents a study of simulation of the ring rolling process in the Simufact Forming simulation environment, utilizing the finite element method. The planned research methodology, with the objective of obtaining verified ring forming technology, is presented in the introduction. The scope and method of conducting plastometric tests, which served for the development of a mathematical description of material changes,'is presented. Further on, dependencies between various types of adopted roll kinematics in the ring rolling process are indicated, along with their influence on the course of the process and ring geometry. The article indicates the possibility of applying a simplified simulation process, which will not affect the course of rolling after transfer of results to physical tests performed on a laboratory or industrial rolling mill. Obtained results of ring forming numerical simulations and process conditions, such as: rotational speed of the main roll, mandrel advance and force demand of the process, served for the design and construction of a model ring rolling mill, on which tests will be performed to verify the simulation.