摘要
针对钢制焊接弯管内壁热影响区的氧化物及焊渣抛光难题,将陶瓷载体、碳化硅钢砂及水的混合磨料按一定比例装入组焊管内,并固定于弹簧振动研磨槽上,利用研磨机的三元振动效应带动磨料在管道内高速振动,使磨料对管道内壁持续摩擦切削,从而实现对管道内壁焊斑的抛光。研究发现:当陶瓷载体、碳化硅钢砂及水的混合比例为5:1:1,装载体积为预抛焊管组件内容积的80%,振动研磨机转速为1000 r/min,抛光10 min,φ76-2 mm弯管内壁处的焊斑得到有效清除,表面抛光质量可达2级。同时,振动抛光可有效消除管组焊件焊缝的残余应力,应力消除率最高可达50%,高于振动时效、冲击时效单项工艺的处理效果。
Aiming at the oxide and welding slag polishing problems in the heat-affected zone of inner wall of steel welded elbows,the mixed abrasive of ceramic carrier,silicon carbide steel sand and water in a certain proportion was put into welded pipe,and it was fixed on the spring vibration grinding groove.Using the three-dimensional vibration effect,the grinder drives the abrasive to vibrate at high speed in the pipe,and the abrasives can continuously cut the inner wall of the pipe,so as to realize the polishing of welding spot on the inner wall of pipe.It is found that when the mixing ratio of ceramic carrier,silicon carbide steel sand and water is 5:1:1,the loading volume is 80%of the volume of the welded pipe,the rotating speed of the vibration grinder is 1000 r/min,and the polishing time is 10 min,the welding spots on the inner wall of elbow inφ76-2 mm pipe are effectively removed,and the surface polishing quality can reach level 2.At the same time,the vibration polishing can effectively eliminate the residual stress of the pipe assembly weldment,and the stress relief rate can reach maximum of 50%,which is higher than the single processing effect of vibration aging or impact aging.
作者
王东亮
王伟
陆凯雷
WANG Dongliang;WANG Wei;LU Kailei(NR Electic Power Electrionics Co.,Ltd.,Changzhou 213025,China)
出处
《热加工工艺》
北大核心
2022年第5期142-146,150,共6页
Hot Working Technology
基金
常州市柔性输变电装备技术应用重点实验室项目(CM20163004)。
关键词
焊管
内壁焊斑
抛光
振动
残余应力
welded pipe
inner wall weld spot
polishing
vibration
residual stress
