Self-feedback control method and system for coordinated optimization of lumber flatness and residual stress

Abstract

The invention discloses a self-feedback control method and system for coordinated optimization of laminated material flatness and residual stress. The system comprises a flatness and residual stress coordinated optimization database and a process optimization control system. According to the system, additive and hammering process parameters are systematically arranged, the relationship between theprocess parameters and the flatness and the residual stress is researched and concluded, and meanwhile the corresponding relationship between the flatness and the residual stress is established. In the production process, the system performs real-time monitoring on the flatness according to the relationship between the flatness and the residual stress and based on a three-dimensional scanning technology; initial setting of additive parameters and real-time control of hammering parameters are achieved through the coordinated optimization system and the process control center, coordinated optimization of flatness and residual stress is achieved, and the parameter setting accuracy and the production efficiency are improved while the additive and hammering process production effect is guaranteed.

Description

Technical field[0001]The invention relates to the technical field of additive manufacturing, in particular to a self-feedback control method and a self-feedback control system for coordinating and optimizing the flatness and residual stress of the accumulated material in the additive process.Background technique[0002]The additive manufacturing technology is to divide the three-dimensional model into a set of parallel two-dimensional layers according to the requirements of the welding process, and then plan the motion trajectory of the welding gun according to the contour information of the different layers, and then the metal material is melted by the welding arc, and the shape is The path stacks the layers one by one, and finally the metal layers are stacked to obtain the desired shape. After the addition, residual stress is formed inside the part. Residual stress will not only affect the performance of the parts, but also gradually accumulate as the number of deposited layers incr...

AI Technical Summary

Problems solved by technology

[0005] However, in the current additive process, due to the unilateral consideration of the stress relief effect of hammering, the weld after hammering often does not meet the requirements, which will eventually have a serious impact on the quality of the formed additive product.

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