Modular substrate heating device of selective laser melting equipment

Abstract

The invention discloses a modular substrate heating device of selective laser melting equipment. The device comprises a substrate, and a heat conduction plate, a heating assembly, a heating jacking plate and a spring which are arranged below the substrate, and the device further comprises a heat insulation block , wherein the spring is arranged in a spring hole in the surface of a workbench, the heating jacking plate is arranged on the spring, the heat insulation block is arranged on the heating jacking plate, the heat insulation block is provided with a concave heating assembly arrangement cavity, the heating assembly is arranged in the heating assembly arrangement cavity, the upper surface of the heating assembly is slightly higher than the upper surface of the heat insulation block, the heat insulation block is pushed by the heating jacking plate to drive the heating assembly to move up and down, and the upper surface of the heating assembly is completely attached to the heat conduction plate at most. According to the modular substrate heating device of the selective laser melting equipment, reliable and efficient selective laser melting operation can be realized.

Description

technical field [0001] The invention belongs to the field of metal additive manufacturing, and more specifically relates to a modular substrate heating device for laser selective melting equipment. Background technique [0002] Selective Laser Melting (SLM) technology is an additive manufacturing method that uses laser beams to selectively heat and melt powder materials to deposit them layer by layer. The process is usually as follows: First, a layer of metal powder is spread on the substrate or the deposited solid surface with a powder spreading mechanism, and then the powder is irradiated quickly with a high-energy focused laser beam according to a certain scanning path, and the irradiated powder is melted, solidified to form a sediment layer. After depositing a layer, the substrate is lowered to a certain height, and then another layer of powder is laid for laser scanning, and the above process is repeated until the entire part is formed. [0003] In the prior art, larg...

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Problems solved by technology

[0003] In the prior art, the forming time of large-scale and complex metal components is long, the thermal stress is large, defects such as macro cracks are prone to occur, and the substrate is also easily deformed, which makes the forming process unsustainable

On the other hand, heat accumulation such as laser radiation and forming preheating can easily lead to deformation of precision parts of heating equipment, and ultimately affect the forming accuracy of metal components

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