Composite selective laser melting device for printing supporting structure and forming method

Abstract

The invention discloses a composite selective laser melting device for printing a supporting structure and a forming method, and belongs to the technical field of selective laser melting forming. The composite selective laser melting device is composed of a laser emitter, a galvanometer, a powder collecting device, an air inlet, a powder laying roller, a powder feeding cavity, a forming cavity, a base plate, the supporting structure, a workpiece, a printing device, an air outlet and a mechanical arm. Through cooperative use of an extrusion head and a ventilation head in the printing device, a base plate and a supporting structure made of a low-melting-point material are rapidly printed, and redundant powder influencing forming of the supporting structure is recycled by the powder collecting device, so that accurate forming of the supporting structure is guaranteed; printing of the supporting structure and a workpiece can be completed through different materials, and the problem that the supporting structure is difficult to separate from the workpiece after laser printing of the overhanging piece is solved.

Description

technical field [0001] The invention relates to a composite laser selective-area melting device and a forming method for printing support structures, belonging to the technical field of laser selective-area melting and forming. Background technique [0002] 3D printing is a kind of rapid prototyping technology, also known as additive manufacturing. It is a technology based on digital model files and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. . The traditional laser selective melting technology often uses support structures to print hanging parts, and the material of the support structure and the material of the workpiece are both shaped by laser printing, which makes it difficult to separate the support structure from the workpiece or damage the workpiece when the workpiece is taken out. Although extrusion-type 3D printing equipment can print workpieces without supporting structures, it is easily limited by th...

AI Technical Summary

Problems solved by technology

The traditional laser selective melting technology often uses support structures to print hanging parts, and the material of the support structure and the material of the workpiece are both shaped by laser printing, which makes it difficult to separate the support structure from the workpiece or damage the workpiece when the workpiece is taken out. Extrusion 3D printing equipment can print workpieces without supporting structures, but it is easily limited by the melting point of materials, which means that it is difficult to print metal materials with high melting points

[0003] Therefore, there is a need for an unsupported structure that can satisfy laser selective melting or a method or device that can easily eliminate support structures, so that laser selective melting technology can be widely used in more complex forming fields. However, innovative research designs in this field have Very few, with strong development potential

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