Technological parameter optimization method for eliminating residual stress of ring part through cold rolling method

Abstract

The invention provides a technological parameter optimization method for eliminating residual stress of a ring part through a cold rolling method. According to the initial residual stress distributionstate of a workpiece, based on the rolling mechanical and kinematic conditions of the ring part, the requirements of the ring part for the final size and mechanical performance are combined, and meanwhile, the capacity of ring part rolling technological equipment is considered, the residual stress elimination rate and distribution uniformity serve as control optimization targets, the allowable ranges of the reduction rate, the driving roller rotating speed, the friction coefficient, the core roller radius and the core roller feeding speed serve as constraint conditions, and the comprehensiveoptimization setting method for technological parameters for eliminating the residual stress of the ring part through the cold rolling method is provided. According to the method, the stress elimination effect can be systematically and comprehensively evaluated, the technological parameters are scientifically, efficiently and accurately formulated, cold rolling residual stress elimination treatment is carried out on the ring part in a targeted mode, the residual stress regulation and control effect is greatly improved, and the technical advantages of eliminating the residual stress of the ringpart through the cold rolling method are fully exerted.

Description

Technical field[0001]The patent relates to the field of residual stress elimination, in particular to a method for optimizing process parameters for eliminating residual stress of a ring by a cold rolling method.Background technique[0002]High-performance ring parts are the key connecting parts of the launch vehicle and the key parts of the aircraft cabin. Generally, solid solution-quenching-age strengthening alloys are used. After rolling, the rings must be solution quenched to improve the toughness, strength, and strength of the material. Fatigue resistance and corrosion resistance, etc. However, the ring after solution quenching will produce larger quenching residual stress, which will cause serious deformation and even warpage in subsequent machining. After heat treatment, the inside of the ring is in an unstable equilibrium state of residual stress. When the external conditions change to a certain extent, this unstable equilibrium state is broken, resulting in the release of par...

AI Technical Summary

Problems solved by technology

[0007] However, the process parameters used in the technical application of the existing cold rolling method to eliminate the residual stress of the ring are mainly based on the simulation or the traditional pre-deformation treatment method. The main problems are: (1) the effect on the residual stress of the ring The evaluation is relatively simple and cannot systematically and comprehensively reflect the effect of stress relief

Therefore, there is an urgent need for a systematic and comprehensive evaluation method for the effect of residual stress relief. On this basis, a scientific, efficient, and accurate process formulation method is proposed to solve the problem that the effect of cold rolling method to eliminate residual stress is relatively simple. To solve the problem, the cold rolling method to eliminate the residual stress of the ring is targeted to avoid blindness in the test and improve the test efficiency, so as to quickly and effectively determine the best process plan for the cold rolling method to eliminate the residual stress of the ring. To achieve the purpose of reducing and homogenizing the internal residual stress of the ring and improving the service life of the ring

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