Additive manufacturing deformation control method and device for large thin-wall structural part

Abstract

The invention discloses an additive manufacturing deformation control method and device for a large thin-wall structural member, and the method comprises the steps: carrying out the additive process simulation of the structural member, and predicting the deformation information of the structural member; a combined deformation control tool is constructed; in the process of increasing the additive manufacturing height of the structural part, N shape control devices are installed in a stacked mode one by one so that the overall shape of the structural part can be limited in the additive manufacturing process; scanning the shape of the structural part after additive manufacturing, correcting the shape of the first part which does not meet the condition, and fixing the shape of the first part through a deformation control tool; and overall stress relief heat treatment is carried out on the structural part with the deformation control tool, so that precision control over the structural part is completed. According to the deformation control scheme for additive manufacturing of the large thin-wall structural part, the structural part can be corrected in the whole additive manufacturing process, and irreparable deformation caused by accumulation of internal stress and deformation is avoided.

Description

technical field [0001] The invention relates to additive manufacturing technology, in particular to a method and device for controlling deformation during additive manufacturing of large thin-walled structural parts. Background technique [0002] Additive manufacturing technology is a new and rapidly developing manufacturing technology in recent years. For large thin-walled structural parts, arc fuse additive materials or laser powder feeding additive materials are often used for manufacturing. Compared with traditional casting or machining methods, it can significantly improve production efficiency and reduce costs, and is especially suitable for rapid development processes. During the additive manufacturing process of large thin-walled structures, deformation is easily generated. Since the additive manufacturing process is a continuous thermal cycle process, a large amount of residual stress will be accumulated during the manufacturing process. As the manufacturing proces...

AI Technical Summary

Problems solved by technology

However, the preset deformation of the substrate can only alleviate the overall deformation of the structural parts caused by the deformation of the substrate. It has a certain effect on small height dimensions (300mm), it is difficult to transfer heat during the additive process. To the substrate, that is, the thermal stress and its release are mainly the part itself, and the resulting deformation cannot be controlled

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