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根据上述关系就可以测定环缝各透照部位的内外中心,具体步骤如下:首先测量被探工件的内外半径,然后在环缝的内侧或外侧标出各透照部位的中心,并测量各中心间的弧长。再运用上式计算相对应的另一侧的弧长,最后以环缝上的“T”字接缝处的透照部位中心(即“T”字接缝的中心)为起点,测量相应的弧长数值,逐个标出各透照部位另一侧的中心。这样各透照部位的内外中心也就重合了。
According to the above relationship, the inner and outer center of each transillumination site in the girth can be measured. The specific steps are as follows: Firstly, the inner and outer radii of the workpiece are measured, then the center of each transillumination site is marked on the inside or outside of the girth, Between the arc length. Then use the above formula to calculate the corresponding arc length of the other side, and finally start with the center of the transillumination area (ie, the center of the “T” word seam) at the “T” seam on the girth , Measure the corresponding arc length values, one by one marked on the other side of the transillumination center. In this way, the internal and external centers of transillumination sites will also coincide.