摘要
目的提高电弧增材制造质量,获得更好的参数匹配。方法研究机器人焊接速度和层间冷却时间变化对增材件形貌、熔宽、余高的影响规律。选取焊接速度为30 cm/min和40 cm/min,层间冷却时间为30 s和40 s,进行两变量两个水平的全面实验。利用机器人电弧增材制造技术在5 mm厚的316L不锈钢板上进行20层的堆积;在焊道上均匀选取6个点,测得总高、熔宽和余高数据。在此基础上,分析增材件总体形貌及熔宽、余高的变化规律。结果发现当层间冷却时间达到一定值后,熔池已凝固且温度较低,熔宽、余高变化不大。随着焊接速度提升,熔池单位时间内熔化的金属量锐减,引起增材件熔宽、余高缩小。结论改变焊接速度对增材件形貌的影响更为明显,层间冷却时间达到一定值后,层间温度不再发生变化,形貌变化不大。
The paper aims to improve the quality of wire and arc additive manufacture and obtain better parameter matching.The influence of different robot welding speeds and interlayer cooling time on the morphology,weld width and height of additive parts were studied.Welding speed of 30 cm/min and 40 cm/min,and interlayer cooling time of 30 s and 40 s were selected to carry out comprehensive experiment on two levels of two variables.The robot wire and arc additive manufacture technology was used to stack 20 layers on 5 mm thick 316L stainless steel sheets;six points were evenly selected on the weld bead to measure the total height,width and height.On this basis,the overall morphology,width and height of the additive parts were analyzed.When the interlayer cooling time reached a certain value,the molten pool was solidified and the temperature was low,so the width and height did not change much.With the increase of welding speed,the amount of molten metal per unit time in the molten pool sharply decreased,which in turn caused the height and width of the additive parts to shrink.Change of welding speed has more significant influences on the morphology of additive parts.The interlayer temperature would not change and the morphology would not change greatly when the interlayer cooling time reaches a certain value.
作者
林泓延
黄舒薇
姚屏
王晓军
LIN Hong-yan;HUANG Shu-wei;YAO Ping;WANG Xiao-jun(Guangdong Polytechnic Normal University,Guangzhou 510630,China;Tianhe College of Guangdong Polytechnical Normal University,Guangzhou 510000,China)
出处
《精密成形工程》
2020年第4期100-106,共7页
Journal of Netshape Forming Engineering
基金
国家自然科学基金(51805099)
广东省省级科技计划(2017B090914005)
广东省研究生教育创新计划(2017QTLXXM38)
2018年广东省联合培养研究生示范基地项目
广州市科技计划(201805010001)。
关键词
电弧增材制造
机器人焊接速度
层间冷却时间
成形精度
wire and arc additive manufacture
robot welding speed
interlayer cooling time
forming accuracy
