Substrate residual stress control method in component additive manufacturing process and component additive manufacturing equipment

Abstract

The invention provides a substrate residual stress control method in the component additive manufacturing process and component additive manufacturing equipment. The substrate residual stress control method comprises the following steps of S1, establishing a three-dimensional entity model of an additive manufacturing structural component and a substrate by utilizing three-dimensional software; S2, carrying out analog simulation analysis on the additive manufacturing process so as to obtain a stress distribution result of the substrate in the additive manufacturing process; S3, determining a substrate stress concentration area in the additive manufacturing process according to the stress distribution result of the substrate; S4, polishing the upper surface or the lower surface of the stress concentration area of the substrate so as to obtain a metallic luster surface; S5, coating the metallic luster surface with a coupling agent, and carrying out additive manufacturing production on the substrate; S6, measuring the residual stress value sigma of the metallic luster surface once every n seconds by utilizing an ultrasonic strain gauge, wherein the substrate area with sigma continuously measured for three times greater than a set threshold value is a to-be-destressed area; S7, carrying out ultrasonic impact strengthening on the to-be-destressed area; and S8, returning to the step S6. The method and the equipment have the advantage that the buckling deformation of the substrate is small.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to a method for controlling the residual stress of a substrate in the component additive process and component additive equipment. Background technique [0002] The Chinese patent application with the publication number CN110586941A discloses a deformation control system and method in the additive manufacturing process of metal parts, which includes a rotary table, a stress relief device, a frequency detection device, a forming device and a stress detection device, wherein: stress relief The device includes a vibration exciter and a vibration exciter, the vibration excitation table is fixed on the vibration exciter, and a substrate is fixed on it, and the vibration exciter is fixed on the rotary table; a frequency detection device, a forming device and a stress detection device The device is installed above the substrate; when the system is working, after the formin...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: in the process of additive manufacturing, the warping deformation of the substrate is large, which seriously affects the dimensional accuracy of the additive material, making the workbench fixture easy to be deformed and cracked by force

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