SLM printing method and system capable of controlling deformation of thin-wall structure

Abstract

The invention discloses an SLM printing method and system capable of controlling deformation of a thin-wall structure. The printing method comprises the following steps: acquiring an initial three-dimensional model diagram of a workpiece to be printed to determine a thin-wall structure on the workpiece to be printed, wherein the thin-wall structure is provided with a first inner surface and a first outer surface; and generating a model of a support body according to the thin-wall structure, and guiding the model of the support body into an initial three-dimensional model diagram to obtain a three-dimensional model diagram of the workpiece to be printed with the support body, wherein the support body is provided with a second outer surface, the shape of the second outer surface is the sameas that of the first inner surface, gaps between the second outer surface and the first inner surface are uniformly distributed, the widths of the gaps are preset widths, and the wall thickness of thesupport body is greater than a second preset thickness. The SLM printing method and system have the beneficial effects that the non-contact support body is used for controlling the deformation of thethin-wall structure in the printing process, the technical problem that an existing contact support body and the thin-wall structure are difficult to separate is solved, and the removal difficulty ofthe support body is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of SLM printing, in particular to an SLM printing method and system capable of controlling deformation of thin-walled structures. Background technique [0002] SLM (Selective Laser Melting) is a major technical approach in the additive manufacturing of metal materials. This technology uses laser as the energy source, and scans the metal powder bed layer by layer according to the planned path in the 3D CAD slice model. The scanned metal powder achieves the effect of metallurgical bonding through melting and solidification, and finally obtains the design of the model. For metal parts, the specific working process is: the platform in the powder supply bin rises to a certain height according to the set layer thickness of powder, and the horizontal movement of the scraper clamp drives the scraper to evenly lay the metal powder on the substrate of the forming bin; Under the control of the mirror, the area to be m...

AI Technical Summary

Problems solved by technology

When the shape of the workpiece is complex, how to remove the loaded support structure is the biggest problem. Often the difficulty of removing the support structure is even higher than that of printing the workpiece itself, which severely limits the scope of application of the SLM printing process.

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