摘要
为探究间隙填充模型提高表面质量的热原因,课题组利用Visual Environment软件建立电弧增材制造间隙填充有限元模型,分析了基体与填充体的温度历程,对比间隙填充模型与传统搭接模型中间道温度场变化,探讨填充体增材方向及冷却时间对温度场的影响,并通过试验验证模拟结果。结果表明:间隙填充体峰值温度相较搭接体温度降低了176℃,基体与填充体运动同向与反向差别较小;随着冷却时间增加,填充体中点峰值温度逐渐减少且幅度变缓。间隙填充使峰值温度明显降低,基体与填充体同向及适当增加冷却时间可使增材制造温度分布更加均匀,得到更好的表面质量。
To explore the thermal reasons for the gap-filling model to improve the surface quality, the finite element model of gap-filling in arc additive manufacturing was established by Visual Environment software. The temperature history of the matrix and gap-filling was analyzed. The temperature field changes in the intermediate channel between the gap-filling model and the traditional lap joint model were compared. The influence of filler material direction and cooling time on the temperature field was discussed. The simulation results were verified by experiments. The results show that the peak temperature of the gap-filler is 176 ℃ lower than that of the lap joint, and the difference between the movement of the matrix and the filler in the same direction and the opposite direction is small. As the cooling time increases, the peak temperature at the midpoint of the filler gradually decreases and the amplitude becomes slower. Gap-filling significantly reduces peak temperature, the same orientation of the matrix and gap-filler and the appropriately increased cooling time can make the temperature distribution of additive manufacturing more uniform and obtain better surface quality.
作者
邵海龙
邢彦锋
张军
张小兵
杨夫勇
曹菊勇
SHAO Hailong;XING Yanfeng;ZHANG Jun;ZHANG Xiaobing;YANG Fuyong;CAO Juyong(School of Mechanical and Automobile Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)
出处
《轻工机械》
CAS
2023年第1期23-29,共7页
Light Industry Machinery
基金
上海市科委项目(20ZR1422600)。
