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为了防止气体保护焊时氢进入焊缝金属,在焊丝盘和引入焊咀的导向端子间,加设一个焊丝除水装置。右图中,送丝滚轮3,将焊丝盘1中的焊丝2在通过导向装置4和导管5送出前,经除水装置6,用温度为80～100℃、流速为了米/秒的热风吹干。用此法焊接的试件进行拘束裂纹试验,与过去的方法相比,提高了焊缝强度,得到了优质的焊缝金属。
In order to prevent hydrogen from entering the weld metal during gas shielded welding, a wire dewatering device is added between the wire spool and the leading terminal of the lead-in tip. In the right figure, the wire feed roller 3 is used to blow the wire 2 in the wire reel 1 through hot water blowing at a flow rate of 1 m / s at a temperature of 80 to 100 ° C before being sent out through the guide 4 and the conduit 5 through the dewatering device 6 dry. The specimens welded by this method were subjected to the restrained crack test, which improved the weld strength and obtained the superior weld metal compared with the past methods.