论文部分内容阅读
在焊缝及外观质量要求很高的薄壁圆筒形容器制造中,往往需要采用辗压校平工艺,以消除焊后筒壁在焊接区内的变形和焊缝高低不平现象,且能增强焊缝材质的密度。图1所示的带有缩口封头的薄壁容器,其筒体材质为双镜面1Cr18Ni9Ti不锈钢板,壁厚1mm、工件的上、下环焊缝要求经工艺处理(例如辗压校平后抛光)后,在成品制件上不允许留有焊缝痕迹,仍保持“镜面”的表面质量。虽然可以采用电弧热量较集中、焊接热影响区较小的氩弧焊,并采用合适的焊接夹具与其配合,使焊接变形大为减小,但由于壁薄等原因仍会产生较大变形。若用手工锤击校平,则校平困难、且校平后会在焊缝区内的筒壁上产生锤击痕迹,使下道工序抛光困难;同时效率极低,不适应批量生产需要。为此,我厂在制造中总结出了一套方法,现简介如下。
In the manufacture of thin-walled cylindrical vessels with high requirements on weld quality and appearance quality, the rolling leveling technique is often used to eliminate the deformation of the cylinder wall in the welding zone and the unevenness of the welding seam and enhance the weld Material density. Figure 1 shows the thin-walled container with a truncated head, the cylinder material is double-mirror stainless steel 1Cr18Ni9Ti, wall thickness of 1mm, the workpiece upper and lower girth weld process requirements (such as rolling leveling Polished), the weld remains on the finished part are not allowed, and the “mirror” surface quality remains. Although the arc heat can be more concentrated, welding heat-affected zone smaller argon arc welding, and use the appropriate welding fixture to cooperate with the welding deformation greatly reduced, but due to thin wall and other reasons will have a greater deformation. If the manual hammering leveling, the leveling is difficult, and leveling will produce hammer marks on the cylinder wall in the weld zone, so that the next process polishing difficulties; at the same time the efficiency is very low, does not meet the needs of mass production. To this end, I plant summed up in the manufacturing of a set of methods, are as follows.