At the same time a method of utilizing round swing transition horn is put forward to void shock produced in the process of welding two round pipelines of the same or similar diameter by such experiments and debugging 同时通过附加圆摆动的折线轨迹曲线的实验和调试,确定了利用圆摆动过渡尖角的方法,避免了当焊接两圆管直径相同或是相近时在焊接过程中产生的冲击。