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

A residual stress, coordination and optimization technology, applied in the field of additive manufacturing, can solve the problems of non-compliance of welds and the quality of additive products, and achieve the effect of avoiding non-compliance with requirements

Active Publication Date: 2020-05-26
CHONGQING UNIV
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  • Claims
  • Application Information

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.

Method used

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  • Self-feedback control method and system for coordinated optimization of laminated material flatness and residual stress
  • Self-feedback control method and system for coordinated optimization of laminated material flatness and residual stress

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Embodiment Construction

[0036] In the prior art, it is desired to obtain a smaller initial flatness when adding materials. The present invention does the opposite, adopting a larger initial flatness to ensure that the weld seam produces sufficient plastic elongation deformation after the contact impact to offset the uncoordinated strain. Therefore, the greater flatness after material addition is of great help to the subsequent hammering work. At the same time, consider the flatness after hammering to ensure that the shape and flatness of the weld after contact impact also need to meet the standard.

[0037] A self-feedback control method for coordinating and optimizing the flatness and residual stress of lumber, comprising the following steps:

[0038] According to the historical data of the additive process and the hammering process, the following correspondence is established:

[0039]The relationship between the flatness of the weld and the residual stress is used to obtain the corresponding res...

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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 a product during the additive process. Background technique [0002] Additive manufacturing technology is to divide the three-dimensional model into a group of parallel two-dimensional layers according to the requirements of the welding process, and then plan the trajectory of the welding torch according to the contour information of different layers, and then melt the metal material by the welding arc, according to the shape The path builds up the plies one by one, and finally the metal plies are piled up to get the desired shape. Residual stresses are formed inside the part after the addition. Residual stress will not only affect the performance of the parts, but also gradually accumulate with the increase of the number of deposit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418B21D1/00B21D3/00
CPCB21D1/00B21D3/00G05B19/41865G05B2219/32252Y02P90/02
Inventor 权国政鹿超龙温志航张建生周杰
Owner CHONGQING UNIV
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