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2) 立焊①试板装配尺寸见图8、表3。焊接工艺参数见表4。②第一层击穿焊。在点固焊缝上方10～15毫米处划擦引弧,然后拉回到点固焊缝中心稍加摆动加热,使坡口根部、钝边及点固焊缝熔化形成第一个熔池(也叫熔池座),如图9所示。然后左右击穿灭弧焊接,同平焊时的第一层操作方法。不同的是,可明显看到被击穿的左右侧钝边熔化形成的熔孔。两侧击穿的缺口
2) vertical welding ① test plate assembly size shown in Figure 8, Table 3. Welding process parameters in Table 4. ② first breakdown welding. At the point of solid welding seam above 10 ~ 15mm arc scratch, and then pulled back to the point of solid welding center a little swing heating, the bevel root, blunt edge and the point of solid welding seam melting the first pool ( Also known as bath pool seat), as shown in Figure 9. Then around the arc welding, with the first floor of flat welding method of operation. The difference is, you can clearly see the breakdown of the left and right side of the blunt edge melting fuse hole. Break through the gap on both sides