特种设备行业中常见的不等厚工件在组焊时，会对厚的一侧进行削边处理，而削边处理时对TOFD检测时探头的放置及声束角度都会产生影响。介绍了不同形状的非平面工件的对接焊缝TOFD检测工艺的设置；通过仿真软件模拟探头声场对被检工件的覆盖及计算，总结了2个简单实用的计算公式，以帮助现场检测人员快速方便地对这类工件的对接焊缝进行TOFD检测。

For the more common unequal thickness workpieces welds in special equipment industries, the thick side will conduct chamfered edge, which shall affect the probes placement and the ultrasonic beam angle during TOFD testing. This article described the setting of non-planar workpiece butt welds TOFD inspection process, and summed up two simple and practical formula for the non-planar workpieces of different shapes to help people quickly and easily on-site testing the butt welds of such workpieces during TOFD testing by simulating and calculating the sound field of probes through using simulation software to cover of the workpieces.