Deformation control method and system based on replanning of heating sequence of heat affected zone

Abstract

The invention discloses a deformation control method based on replanning of a heating sequence of a heat affected zone. The method comprises the following steps: acquiring contour data after a model is sliced; dividing the contour data into a thin-wall contour and a solid contour; when contours with internal and external properties exist in the sliced contour data, the contours are judged to be thin-wall contours; when the sliced contour data only contains one contour, determining that the contour is an entity contour; for the thin-wall contour, the external rectangular distance between the inner contour and the outer contour is calculated, and scanning line filling forming is determined according to a set threshold value; for the entity contour, the length-width ratio of the minimum enclosing rectangle of the entity contour is calculated, and scanning line filling forming is determined in combination with a set threshold value; on the basis of contour data, the partition and path scanning mode of the current layer is actively searched, and the defect of traditional judgment depending on experience is overcome; and the residual stress in the part is reduced in a gradual remelting mode, and the small-deformation printing scale of the metal part can be popularized to large and medium-sized parts.

Description

technical field [0001] The invention belongs to the technical field, and in particular relates to a deformation control method and system based on re-planning of heating sequence in a heat-affected zone. Background technique [0002] The forming of large metal parts can be divided into two categories according to the precision of the forming parts. One is the forming technology based on powder materials, such as laser cladding, laser selective melting and electron beam selective melting, etc. Its advantages are high forming precision, The printed parts are ready to use with no or minimal machining. The other type uses metal wire as the raw material for forming technology, such as arc fuse forming, laser hot wire and electron beam fuse, etc. Its advantages are high forming efficiency, and the printed parts are mostly precision blanks. The main reason why these two types of metal additive processes are difficult to print large and medium-sized parts is the deformation of the ...

AI Technical Summary

Problems solved by technology

However, such processing methods are heavily dependent on the processing experience of the operator and the molding efficiency is low

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