Plasma casting rapid molding equipment and rapid molding method

Abstract

The invention discloses plasma casting rapid molding equipment and a rapid molding method. The equipment comprises a monitoring system, a plasma beam processing system, and a plurality of printing platforms. Each printing platform comprises a horizontal printing table, a printing table position adjusting device and an electric walking device. The plasma beam processing system includes a plasma generator, a printing position adjusting device, a gas supply device and a wire sending device. The monitoring system includes a walking controller, a plurality of walking position detection units, a temperature detection unit, a distance detection unit and a printing distance adjusting controller. The method comprises the following steps: 1, acquisition of a 3D model of a workpiece to be molded, and hierarchical slicing processing; 2, scanning path filling; 3, printing path acquisition; and 4, printing layer by layer from top to bottom. The invention has the advantages of reasonable design, simple operation, high molding efficiency, good usage effect, no need of enclosed moulding chamber, protection atmosphere or vacuum environment, and direct molding of workpiece in atmosphere environment.

Description

technical field [0001] The invention belongs to the technical field of rapid prototyping, and in particular relates to a plasma casting rapid prototyping equipment and a rapid prototyping method. Background technique [0002] At present, the rapid prototyping technology of metal parts at home and abroad is mainly the selective laser melting rapid prototyping technology (Selective laser melting, SLM). For example, the U.S. patent "PROCESS AND DEVICE FOR PRODUCTING A SHAPED BODY BY SELECTIVE LASERMELTING" with the patent number US7047098 describes in detail a selective laser melting forming method and equipment for manufacturing dense parts using a three-dimensional digital model. The Chinese invention patent with the publication number CN1603031A "A Method and Device for Selective Laser Melting Rapid Prototyping of Metal Parts" discloses a method and device for selective laser melting rapid prototyping of metal parts. The device includes a semiconductor pumped YAG laser or a ...

AI Technical Summary

Problems solved by technology

[0011] First, the laser cannot protect the droplet, and it is necessary to pass a protective gas at the wire feeder. The protective gas is easy to cool the droplet, which has an adverse effect on the solidification and layered formation of the droplet, resulting in low mechanical properties of the three-dimensional metal parts.

[0012] Second, the laser power is low and the diameter of the metal wire is large, so it is difficult to realize the rapid prototyping of ceramic and composite material parts

[0013] Third, due to the surface tension, the droplet cooling and solidification will produce circular shrinkage, resulting in the surface of the part is not smooth

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