Influence of brake disc manufacturing technology on residual stresses and vibrations in the “disk – pad” system

Abstract

The braking system is one of the main controls responsible for the management and safety of ground transport. Vibrations of the steering wheel and squeaks when braking vehicles are manifested by uneven sensitivity of the brake disc or its buckling. The reasons for the difference in thickness of the brake discs are inaccuracies in their manufacture, as well as uneven wear during operation due to the heterogeneity of properties. Buckling of the presence of brake systems of internal organs, residual stress in parts after formation or thermal stresses that arise during operation. The paper presents the results of a study on the influence of the manufacturing technology of ventilated brake discs on their performance characteristics and residual elastic deformations. So, the highest manufacturing accuracy is ensured when using technology with finishing blade processing, and the lowest - when using technology without dressing the grinding tool.It has been established that grinding, which is the finishing operation of machining, leads to an increase in the level of residual stresses in the material of the part. The heat treatment mode has been selected, which ensures the removal of residual stresses and the optimization of the mechanical properties of the working surfaces. It has been confirmed that the proposed annealing mode ensures the preservation of the geometric parameters of the brake discs and reduces the runout on most of the tested products subjected to various types of machining during manufacture.The work was carried out within the framework of the government order of the Ministry of Science and Higher Education of the Russian Federation (Project No. FZRU-2020-0011).