埋弧自动焊焊接压力容器时,用传统的方法将小车安放在升降台上焊接筒体环缝,所得焊缝质量极不稳定,焊缝成形差,时有焊瘤、焊偏等缺陷,焊缝的宽度差超标,拍片合格率很低。经分析。其原因有以下几个方面:①简体存在椭圆度,导致焊嘴与筒体坡口的间距发生变化。简体直径越大,壁厚越薄,椭圆度越大。②转胎转动不平稳,筒体转动时发生颤动,筒体直径大,壁厚薄或有纵向焊缝转过转胎时,甚至会发生抖 Submerged arc welding automatic pressure vessel, the traditional method of placing the car on the lifting platform welding cylinder ring seam, resulting in very unstable weld quality, poor weld formation, sometimes welding, welding partial defects such as welding The width of the gap exceeds the standard, the film pass rate is very low. After analysis. The reasons for the following aspects: ① Simplified existence of ovality, resulting in welding tip and cylinder groove spacing changes. The larger the diameter, the thinner the wall, the larger the ovality. ② tire rotation is not smooth, the occurrence of fibrillation when the cylinder rotation, the cylinder diameter, thin wall thickness or longitudinal weld turned tire, or even shake