【摘要】 面向激光选区熔化金属3D打印机，设计了一种基板自动调平系统，对基板调平系统的误差构成进行了分析，根据基板调平精度的设计要求，通过计算得到了基板调平系统的热变形允许范围。针对基板调平系统在不同条件下所产生的热变形问题，采用ANSYS软件，建立了考虑热辐射和热传导的有限元模型，模拟分析了不同预热温度和打印件重力对系统热变形的影响规律。根据结果，对原设计进行了修正，保证了基板自动调平系统调平精度符合设计要求。更多还原

【Abstract】 A substrate automatic leveling system is designed for laser selective melting metal 3D printers, and the error composition of the substrate leveling system is analyzed. Based on the design requirements of substrate leveling accuracy, the allowable range of thermal deformation of the substrate leveling system is calculated. A finite element model considering thermal radiation and conduction is established with ANSYS software to address the thermal deformation issues generated by the substrate leveling system under different conditions. The influence of different preheating temperatures and printed part gravity on the system’s thermal deformation is simulated and analyzed. Based on the results, the original design revises to ensure the design requirements for the leveling accuracy of the substrate automatic leveling system.更多还原