Dual selective laser sintering and nonmetal and metal melting 3D (three-dimensional) printing system

Abstract

The invention discloses a dual selective laser sintering and nonmetal and metal melting 3D (three-dimensional) printing system which comprises two laser scanning devices, a main powder spreading device and a control device. The 3D printing system is characterized by further comprising an auxiliary powder spreading device integrally connected with the main powder spreading device through a connecting support and positioned in front of the main powder spreading device, the auxiliary powder spreading device and the main powder spreading device horizontally and bidirectionally reciprocate, metal powder and nonmetal powder are placed in the main powder spreading device and the auxiliary powder spreading device respectively, the main powder spreading device spreads a layer of metal powder when moving every time, the auxiliary powder spreading device controlled by the control device quantitatively spreads the nonmetal powder downwards at fixed points, and the spread nonmetal powder can be covered by later spread metal powder. The 3D printing system has the advantages that part forming efficiency can be effectively improved by dual-laser composite scanning, the metal powder is preheated while the nonmetal powder is sintered by carbon dioxide laser, and the defects such as warping and cracking of metal parts can be effectively avoided.

Description

technical field [0001] The invention relates to a 3D printing system, in particular to a 3D printing system for double-laser selective sintering and melting of non-metal and metal, and belongs to the field of additive manufacturing. Background technique [0002] 3D printing systems that directly manufacture metal parts using Selective Laser Melting (SLM) technology, they can directly manufacture metal parts of any complexity. [0003] The performance of some parts materials can be improved by heat treatment; [0004] There are special requirements for some metal functional parts, such as to withstand extremely high and extremely low temperatures, which can be coated with a nickel-containing superalloy by using electron beam free manufacturing equipment; [0005] However, if a certain material needs to be used in a certain area inside the material to form a small internal channel with complex geometry, the current 3D printing system cannot be successfully realized, and the f...

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Problems solved by technology

[0006] In order to solve the deficiencies of the prior art, the object of the present invention is to provide a 3D printing system for dual laser selective sintering and melting of non-metal and metal. The 3D printing system can not only smoothly form complex metal containing parts, but also improve the forming efficiency of parts. Moreover, it can effectively avoid defects such as warping and cracking of metal parts, and at the same time ensure that the formed metal parts have high precision.

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