A kind of grafting printing method of laser selective melting equipment

Abstract

The invention discloses a grafting and printing method for laser selective melting equipment, which comprises: fixing a substrate on a positioning fixture for processing a substrate; drilling at least three positioning holes on the grafting surface of the substrate, and every three positioning holes are in a triangular relationship , measure the position of the positioning hole relative to the part; start the laser selective melting equipment, load the processing substrate into it, pre-embed and level; start the coaxial molten pool monitoring device, scan the positioning hole, identify the edge of the positioning hole, and according to the scanning path information Obtain the printing coordinates of the positioning hole; match the printing coordinates of the positioning hole with the part coordinates of the positioning hole, and obtain the offset of the x-axis and y-axis directions between the printing coordinate system and the part coordinate system; obtain the roundness of the positioning hole, Calculate and obtain the plane angle between the printing plane and the substrate plane, and judge whether it meets the printing conditions. If so, execute the steps of printing processing; confirm the printing coordinates of the grafting surface of the substrate, and convert them into the corresponding part coordinates, Print processing.

Description

technical field [0001] The invention relates to the technical field of metal additive manufacturing, in particular to a grafting and printing method for laser selective melting equipment. Background technique [0002] Metal additive manufacturing has been widely used in aerospace, rail transit, medical and health and other application fields, among which graft printing as a special manufacturing process is also showing a growing trend. [0003] Graft printing is the process of making parts that are additively manufactured not from scratch, but on existing materials. The substrate for graft printing is generally subtractive by traditional machining methods, while the part printed on it is additively manufactured. [0004] The biggest technical difficulty in metal additive manufacturing graft printing is the positioning of the substrate. The working area of ​​additive manufacturing must be completely coincident with the substrate, otherwise dislocation will occur. If there ...

AI Technical Summary

Problems solved by technology

However, this method relies more on human experience. There is no scientific detection method, and the z-axis direction cannot be positioned. It may cause the flatness of the substrate to be adjusted incorrectly and cause manufacturing failure.

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