Shot blasting deformation numerical simulation method considering coverage rate and path

Abstract

The invention discloses a shot blasting deformation numerical simulation method considering coverage rate and path, which comprises a single-shot impact model, shot number and shot coordinate calculation, a multi-shot impact model and a part deformation prediction model, and specifically comprises the following steps: firstly, establishing the single-shot impact model; then, according to the obtained crater diameter, calculating to obtain the number and coordinates of projectiles meeting the coverage rate requirement; secondly, establishing a multi-projectile model to obtain a depth-stress curve; thirdly, establishing a part deformation prediction model, endowing a stress value to a part to obtain part deformation; then, establishing a new part model, endowing the part with a temperature gradient field, changing the material expansion rate, and making the deformation of the part under the temperature gradient field similar to that under the stress field; and finally, giving the temperature gradient field to the part according to the path, and obtaining the deformation of the part under the specific shot blasting path. According to the method, the influence of the coverage rate and the shot blasting path on part deformation is considered, and the method can play a guiding role in optimization of process parameters in practice.

Description

technical field [0001] The invention relates to the technical field of shot peening deformation, in particular to a numerical simulation method of shot peening deformation considering coverage and path. Background technique [0002] Shot peening is a surface strengthening technology. The surface of the workpiece is sprayed by a high-speed moving shot stream to cause uneven plastic deformation on the surface of the workpiece and form a certain depth of residual compressive stress layer, which can effectively improve the fatigue life of the part. It is suitable for Various shapes and sizes, widely used in various fields such as automobiles and aviation. As an important structural part of the aircraft fuselage, aviation thin-walled structural parts are prone to deformation after shot peening due to poor rigidity, which has a great impact on the accuracy of parts. The deformation of parts caused by shot peening is related to many factors, including the material properties of th...

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Problems solved by technology

[0004] The technical problem solved by the present invention is: providing a numerical simulation method of shot peening deformation considering coverage and path, which solves the numerical simulation problem of shot peening deformation of large-sized parts, and considers the impact of coverage and shot peening path on deformation influences

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