Механика машин, механизмов и материалов (Sep 2020)
Dynamic Stabilization of Rings of Low Rigidity after the Ring-Rolling
Abstract
The physics fundamentals and advantages of ring-rolling the products are described. The analysis of production volumes of the products by ring-rolling in Europe is carried out. The definition of rings of low rigidity is given. The problems of using of the ring-rolling for their production, the main errors and deformations arising in the process of manufacturing of rings of low rigidity are considered. The ways of increasing the geometric accuracy of the rings and relieving residual stresses are analyzed. The fundamental advantage of the method of dynamic stabilization of rings of low rigidity to other types of correction is explained. A brief description of the device expanders for dressing rings of low rigidity with a wedge mechanism is presented. The problems of correction with their use are characterized. As a fundamentally new technological operation that increases the accuracy of manufacturing of rings of low rigidity and reduces residual stresses in them, an effective technology of dynamic stabilization, cyclic loading, is proposed. The prospects of using the cyclic loading method to increase geometric accuracy and reduce residual stresses in rings of low rigidity are substantiated. Recommendations are given on the creation of universal installations for the dynamic stabilization of rings of low rigidity in order to eliminate the deformations that have arisen during the production process and relieve residual stresses after the rings are manufactured on ring-rolling complexes. The calculated dependences for the design of installations for the dynamic stabilization of rings with outer diameters up to 3,000 mm and weight up to 1,000 kg are given. The results can be used to increase the accuracy of manufacturing of rings billets of low rigidity during their planned production at the Belarusian Automobile Plant BelAZ and other enterprises.
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