基于旋涡传感的镁合金压铸件表面微观缺陷检测  

Surface Micro-Defect Detection of Magnesium Alloy Die-Casting Based on Vortex Sensor

作　　者：王飞 张素兰[1] WANG Fei;ZHANG Sulan(College of Computer Science And Technology,Taiyuan University of Science And Technology,Taiyuan Shanxi 030024,China)

机构地区：[1]太原科技大学计算机科学与技术学院,山西太原030024

出　　处：《传感技术学报》2024年第10期1827-1833,共7页Chinese Journal of Sensors and Actuators

基　　金：山西省自然基金项目(202103021224285)。

摘　　要：针对镁合金铸件表面微观形态变化较小,砂眼和毛刺等缺陷视觉特征表现不明显,导致人工检测难度较高的问题,提出基于旋涡传感的镁合金压铸件表面微观缺陷检测方法。将长时间磨损和外力加持两种情况下引起镁金属能量强度变化作为下一步检测的参照,利用旋涡传感技术在被测铸件周围设置带有交流电的线圈磁场,根据铸件表面金属参数调节旋涡传感密度,识别到铸件表面出现与线圈磁场相反方向磁场力时,即完成精准检测。结果表明,所提方法不同提离距离下,砂眼铸件缺陷最大镁金属能量强度为363 MJ和360 MJ,毛刺铸件缺陷最大镁金属能量强度为270 MJ和300 MJ。验证了所提方法可以准确检测镁合金压铸件表面裂纹和凹陷缺陷。Targeting at the problem that the micro-morphology of the surface of magnesium alloy castings changes little,and the visual characteristics of defects such as sand holes and burrs are not obvious,which leads to high difficulty of manual detection,a method based on vortex sensor for the detection of micro-defects on the surface of magnesium alloy die castings is proposed.The change of mag nesium metal energy intensity caused by long-term wear and external force are taken as the reference for the next step of detection,the vortex sensing technology is used to set the coil magnetic field with alternating current around the measured casting,the vortex sensing density is adjusted according to the metal parameters of the casting surface,the magnetic field force in the opposite direction of the coil magnetic field on the casting surface is identified,and the accurate detection is then completed.The results show that the maximum magnesium metal energy intensity of sand hole casting defects is 363 MJ and 360 MJ,and the maximum magnesium metal energy inten sity of burr casting defects is 270 MJ and 300 MJ under different lifting distance of the proposed method.It is verified that the proposed method can accurately detect the surface cracks and dents of magnesium alloy die castings.

关 键 词：镁合金压铸件 表面微观缺陷 旋涡传感检测 夹杂物质量 线圈磁场 

分 类 号：TG115.28[金属学及工艺—物理冶金]