Scanning method used for metal laser selective melting forming process

Abstract

The invention relates to a scanning method used for a metal laser selective melting forming process. By means of the method, the probability that thermal stress concentration, stress concentration, cracking and other defects happen in the metal part forming process is greatly reduced, and the forming quality of final parts is ensured. The method comprises the main steps that (1) contour offset iscarried out; (2) multiple Thiessen polygons are constructed in an inner contour area; (3) the inner contour area is canned; (4) a narrow-side outer contour area is scanned; (5) the steps from 1 to 4 are repeated till scanning of all of N-1 layers of sections is completed; and (6) the Nth section is scanned.

Description

technical field

[0001] The invention belongs to the technical field of additive forming manufacturing, and in particular relates to a scanning method for a metal laser selective melting forming process. Background technique

[0002] Additive manufacturing technology (also known as "3D printing") is a high-end digital rapid manufacturing technology that has developed rapidly in recent years. It is suitable for the near-net shape of complex components. The formed parts manufactured by additive manufacturing technology have excellent mechanical properties. , suitable for rapid prototyping of various materials, and the material utilization rate is high. Selective Laser Melting (SLM) technology is a typical representative of additive manufacturing. It transforms the traditional three-dimensional manufacturing process into a planar manufacturing-cumulative superposition process, and realizes the manufacture of three-dimensional complex precision parts through layer-by-layer meltin...

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