中国激光, 2017, 44 (4): 0402007, 网络出版: 2017-04-10   

基于金属3D打印的刮板输送机链轮修复技术

Repair of Scraper Conveyor Sprocket Based on Metal 3D Printing
作者单位
1 辽宁工程技术大学机械工程学院, 辽宁 阜新 123000
2 辽宁工程技术大学先进制造技术研究院, 辽宁 阜新 123000
摘要
为了修复矿用刮板输送机链轮, 运用了金属3D打印技术在34CrNiMo6钢板材上进行打印试验, 并对打印结果的金相组织、显微硬度及压痕、耐磨性进行了相关测试。试验结果表明, 打印层硬度为基材硬度的2~3倍, 且打印层耐磨性明显提高。展示了利用金属3D打印技术来修复链轮的整个工艺流程, 通过使用三维激光扫描仪来扫描标准和磨损链轮并获得其点云, 进而求得相应的链轮磨损量, 并用三维建模软件CATIA及其二次开发对磨损量进行适当分层切片, 以建立精确的数控程序来控制激光头对磨损链轮进行修复的路径。最终的打印以及铣削加工结果验证了该二次开发及数控程序的可行性。
Abstract
In order to repair the sprocket of scraper conveyor, the 3D metal printing technology is used to test on 34CrNiMo6 steel plate samples. These samples are carefully examined to acquire metallographic structure, microhardness, indentation and wear resistance. Results show that the hardness is 2~3 times of that of the substrate material, and the wear resistance is also improved dramatically. Subsequently, the employment of this technology to repair a sprocket is carried out. A 3D laser scanner is used to scan a brand new and a worn sprocket to obtain the corresponding point clouds. The data are used to calculate the worn volumes of the sprocket. Software package CATIA is used for modeling and slicing with some newly developed add-on functions. Based on these data, the numerical control programs are established to define and control the repairing paths and parameters of the worn sprocket accurately. 3D printing, milling and test results show that the sprocket is properly repaired, which validates the secondary development, the numerical control programs as well as the developed add-on functions.

翟建华, 王乾宝, 魏晓华, 李艺凡, 张菀麟, 沈成, 刘志杰, 宋晓龙. 基于金属3D打印的刮板输送机链轮修复技术[J]. 中国激光, 2017, 44(4): 0402007. Zhai Jianhua, Wang Qianbao, Wei Xiaohua, Li Yifan, Zhang Wanlin, Shen Cheng, Liu Zhijie, Song Xiaolong. Repair of Scraper Conveyor Sprocket Based on Metal 3D Printing[J]. Chinese Journal of Lasers, 2017, 44(4): 0402007.

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