SUS316异形管件内表面磁针磁力研磨的试验研究

Study on the magnetic abrasive finishing of the inner surface of SUS316 irregular tubular by magnetic needles

为提高异形管件的内表面质量和使用寿命,利用旋转磁场驱动微小磁针研磨管件内壁。运动磁针对管件内壁有碰撞、划擦和滚压的作用效果。在磁针的作用下管件内表面会发生弹性和塑性变形,并产生微小去除量,进而抚平加工纹理,提高表面质量。同时,管件型腔焊接相贯线处的残留焊渣可被完全去除。经过研磨后管件内表面粗糙度平均值Ra由原始的1.47μm下降到0.47μm。磁针磁力研磨可实现对异形管件型腔的光整加工,提高异形弯管的内表面质量和使用寿命。磁针磁力研磨法为异形管件内表面的光整加工提供了一种新的途径。

In order to improve the inner surface quality and service life of the irregular tubular,the rotating magnetic field was used to drive the micro magnetic needles to grind the inner wall of the pipe.The moving magnetic needle has the effects of collision,scratch and rolling on the pipe wall.Under the action of the magnetic needle,the surface of the tube inner wall occured elastic and plastic deformation,and produced a small amount of removal,and then smoothed the processing texture to improve the surface quality.Meanwhile,the residual welding slag at the welding intersecting line of the pipe fitting cavity was completely removed.The average roughness of the inner surface of the milled pipe decreased from the original 1.47 μm to 0.47 μm.The magnetic abrasive finishing of the magnetic needles can realize the finishing of the cavity of the irregular tubular fitting,and improve the inner surface quality and service life of the irregular tubular fitting.The magnetic abrasive finishing method of magnetic needles provides a new way for finishing the inner surface of irregular tubular.