激光与光电子学进展, 2017, 54 (1): 011406, 网络出版: 2017-01-17
基于粉体熔化的选区激光熔化成型方向误差分析
Error Analysis in Formation Direction of Selective Laser Melting Based on Powder Melting
激光技术 Z向误差 选区激光熔化 数学模型 TC4钛合金 laser technique Z axis error selective laser melting mathematical model TC4 titanium alloy
摘要
为降低TC4钛合金选区激光熔化(SLM)的成型方向(Z向)误差, 考察了SLM过程中粉体熔化导致的Z向误差产生和变化的过程。建立了Z向误差累积和补偿数学模型, 并提出了对应的补偿方法。通过成型实验对模型的有效性进行了验证。实验结果表明, 这些模型能够有效地描述TC4钛合金SLM的Z向误差累积和变化的规律; 依照模型提出的补偿方法能够大幅减小Z向误差。相比于传统的Z向误差分析方法, 新模型更加准确, 为未来金属材料SLM成型的误差控制和最优层厚的快速选择提供了参考依据。
Abstract
In order to reduce the errors in the formation direction (Z axis) during the process of selective laser melting (SLM) of TC4 titanium alloy, the generation and variation of Z axis errors caused by powder melting during the SLM process are investigated. The mathematical models describing the accumulation and compensation of Z axis errors are established, and one corresponding compensation method is proposed. Formation experiments are conducted to verify the effectiveness of these mathematical models. The experimental results indicate that these models can effectively describe the accumulation and changing trends of Z axis errors. With the proposed compensation method from these models, the Z axis error can be greatly reduced. Compared with the traditional Z axis error analysis method, the new model is more accurate, and it provides a reference for the error control and rapid selection of optimal layer thickness in SLM of metal materials in future.
张博, 李涤尘, 曹毅, 杨东, 王成. 基于粉体熔化的选区激光熔化成型方向误差分析[J]. 激光与光电子学进展, 2017, 54(1): 011406. Zhang Bo, Li Dichen, Cao Yi, Yang Dong, Wang Cheng. Error Analysis in Formation Direction of Selective Laser Melting Based on Powder Melting[J]. Laser & Optoelectronics Progress, 2017, 54(1): 011406.