长小径不锈钢管内表面的磁性珩磨工艺  

Process of magnetic honing for long and small diameter stainless steel tube surface

作　　者：燕昭锟 姚新改 郭瑞鹏 陈洪胜 YAN Zhao-kun;YAO Xin-gai;GUO Rui-peng;CHEN Hong-sheng(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Precision Machining Key Laboratory of Shanxi Province,Taiyuan 030024,China;College of Engineering Materials,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学机械与运载工程学院,山西太原030024 [2]精密加工山西省重点实验室,山西太原030024 [3]太原理工大学材料工程学院,山西太原030024

出　　处：《机电工程》2022年第5期705-712,共8页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金资助项目(51805358)。

摘　　要：由于长小径不锈钢管的轴向长、内径小,尚未有对其内表面进行光整加工的较好方法,针对这一问题,提出了一种长小径不锈钢管内表面磁性珩磨加工的新工艺。首先,研发了一套磁性珩磨头,使用热压烧结法制备出了梯度复合磁性磨条,并根据尺寸要求设计出了其永磁体结构;其次,使用Ansoft软件确定了永磁体高度以及加工间隙;分析了影响磁性珩磨压力和珩磨表面粗糙度的因素,以磁场因素-工艺参数-加工条件的顺序进行了分析,并制定了其珩磨工艺;最后,对珩磨工艺进行了工艺试验,确定了加工环境对磁性珩磨粗糙度的影响因素。研究结果表明:当磁性珩磨头旋转频率为5 Hz、加工行程为60个,使用W14+湿磨方法加工效果最佳,钢管普通表面粗糙度值可从0.362μm降低到0.07μm,焊缝粗糙度值可从0.969μm降低到0.249μm;该结果也证实了长小径不锈钢管内表面磁性珩磨是行之有效的新工艺。Aiming at the problem that the inner surface of the stainless-steel tube with long small diameter was not well finished,a new process of magnetic honing was put forward.Firstly,a set of magnetic honing head was developed,gradient composite magnetic grinding bar was prepared by hot pressing sintering method,and the permanent magnet structure was designed according to the size requirements.Secondly,Ansoft software was used to determine the permanent magnet height and processing gap.Then,the factors affecting the magnetic honing pressure and roughness of honing surface were analyzed.The honing process was studied in the order of magnetic field factors,process parameters and processing conditions.Finally,the process experiment was carried out to determine the influence of processing environment on the roughness of magnetic honing.The experimental results show that when the rotation frequency of magnetic honing head is 5 Hz,the processing stroke is 60,and the W14+wet grinding method is the best,the roughness value of ordinary steel pipe surface decreases from 0.362μm to 0.07μm,and the roughness value of weld decreases from 0.969μm to 0.249μm.It is proved that magnetic honing on the inner surface of long and small stainless-steel tube is an effective new technology.

关 键 词：光整加工 磁性珩磨工艺 长小径不锈钢管 表面粗糙度 工艺试验 加工环境 

分 类 号：TH161[机械工程—机械制造及自动化] TG580.67[金属学及工艺—金属切削加工及机床]