Additive Manufacturing Technology and Equipment of Rolling Composite Selective Laser Melting

Abstract

The invention provides an additive manufacturing process of rolling-rolling composite selective laser melting, based on the traditional selective laser melting process, after the deposition of each layer, the rolling process is added, which can effectively reduce the internal porosity and microcracks of the formed part, Refine the structure and change the state of residual stress. The present application also provides a device for realizing the above-mentioned milling and rolling composite selective laser melting additive manufacturing process, including a machine frame, a forming cylinder, a forming platform, a powder spreading device and a rolling device; the rolling device includes a support frame, a roll, a first Dovetail slider, first dovetail guide rail, motor, reducer and gear; the opening of the support frame is hinged with a roll; the roll is in contact with the upper surface of the forming cylinder; the upper end surface of the support frame is fixedly connected with the first dovetail slider; the first dovetail The side wall of the guide rail is processed with a tooth shape; the output shaft of the reducer is fixedly connected with the gear; the gear meshes with the tooth shape of the first dovetail guide rail.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to an additive manufacturing process and equipment for rolling-rolling compound selective laser melting. Background technique [0002] Selective laser melting (SLM) is the most widely used additive manufacturing process for metallic materials. It transforms traditional casting, forging and other manufacturing processes into planar manufacturing-cumulative superposition process, and uses high-energy beam laser to melt powder layer by layer to realize direct manufacturing of three-dimensional complex parts. Compared with other additive manufacturing processes, SLM technology has outstanding advantages. On the one hand, because the powder is in a static state, it can play an auxiliary supporting role, so it is suitable for the manufacture of metal parts with any complex shape; the thickness of the powder layer can reach a minimum of about 20 μm, and parts from millimeters to mete...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a rolling composite selective laser melting additive manufacturing process and equipment, which effectively solves the problem of high porosity in the traditional SLM process

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