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基于红外热像的激光微细丝成形过程热累积研究
引用本文:宋栓军,邱成鸿,韩宇琪,方泽钰.基于红外热像的激光微细丝成形过程热累积研究[J].稀有金属材料与工程,2023,52(11):3841-3846.
作者姓名:宋栓军  邱成鸿  韩宇琪  方泽钰
作者单位:西安工程大学机电工程学院,西安工程大学机电工程学院,西安工程大学机电工程学院,西安工程大学机电工程学院
基金项目:国家自然科学基金青年项目(61701384);西安市科技计划先进制造业技术攻关项目(21XJZZ0016)
摘    要:激光微细丝增材制造技术是一种能快速成形小型零件的制造技术,但由于受制造过程中热累积效应的影响,往往无法保证对成形零件的精准控形控性。针对这一问题,本文利用标定后的红外热像仪采集单道多层薄壁零件的表面温度,研究其制造过程温度场特征变化规律及热累积效应,为成形工艺的优化提供依据。结果表明:利用红外热像仪可实现对薄壁堆积过程温度场演化规律的研究,随着熔覆高度的增加,高温区域面积逐渐增大,热累积效应明显增强。熔覆过程中,热量向下传导,散热条件逐渐变差,各层冷却速率随层数增大而减小,直至趋于平稳。此外,当熔覆层数大于15层时,热累积效应不再对15层以下熔覆层产生影响。

关 键 词:增材制造  激光微细丝  红外热像  热累积
收稿时间:2022/10/23 0:00:00
修稿时间:2022/11/17 0:00:00

Research on Thermal Accumulation of Laser filamentous wire Forming Process Based on Infrared Thermography
Song Shuanjun,Qiu Chenghong,Han Yuqi and Fang Zeyu.Research on Thermal Accumulation of Laser filamentous wire Forming Process Based on Infrared Thermography[J].Rare Metal Materials and Engineering,2023,52(11):3841-3846.
Authors:Song Shuanjun  Qiu Chenghong  Han Yuqi and Fang Zeyu
Affiliation:School of mechanical and electrical engineering,Xi''an Polytechnic University,Xi''an,School of mechanical and electrical engineering,Xi''an Polytechnic University,Xi''an,School of mechanical and electrical engineering,Xi''an Polytechnic University,Xi''an,School of mechanical and electrical engineering,Xi''an Polytechnic University,Xi''an
Abstract:Laser filamentous wire additive manufacturing technology is a manufacturing technology that can rapidly form small parts. However, due to the influence of thermal accumulation effect in the manufacturing process, it is often unable to ensure the precision shape control of formed parts. In order to solve this problem, this paper uses the calibrated infrared thermography to collect the surface temperature of single pass multi-layer thin-walled parts, and studies the characteristic variation law of temperature field and heat accumulation effect in the manufacturing process, which provides a basis for the optimization of forming process. The results show that the infrared thermal thermography can be used to study the evolution of temperature field in the process of thin wall stacking. With the increase of cladding height, the area of high temperature area gradually increases, and the heat accumulation effect is significantly enhanced. In the process of cladding, the heat is conducted downward, the heat dissipation condition becomes worse gradually, and the cooling rate of each layer decreases with the increase of the number of layers until it becomes stable. In addition, when the number of cladding layers is more than 15, the thermal accumulation effect will no longer affect the cladding layers below 15.
Keywords:Additive manufacturing  Laser filamentous wire  Infrared thermography  Heat accumulation
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