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三、垂宜固定管的焊接垂直固定管的焊缝接头为横向环缝,操作方法基本上与直缝焊相同。不同之处是由于管子呈弧形,所以在焊接时,要随着环形焊缝的前进,不断变换焊接位置。焊丝与焊嘴的倾角应该保持相对不变,以保证焊缝溶池的形状。管子对接时,钝边和间隙大小要适当。当钝边过大,间隙过小时,焊缝不易焊透,这样就降低了接头强度;当钝边过小,间隙过大时,容易烧穿,使管子内壁产
Third, vertical should be fixed pipe welding vertical fixed pipe joints for the horizontal joints, the operation method is basically the same as the straight seam welding. The difference is due to the tube is curved, so in welding, with the progress of the annular weld, changing welding position. The inclination of welding wire and tip should be kept relatively unchanged to ensure the shape of weld pool. Pipe butt, the blunt edge and the gap size should be appropriate. When the blunt edge is too large, the gap is too small, the weld is not easy to penetrate, thus reducing the strength of the joint; when the blunt edge is too small, the gap is too large, easy to burn through, so that the pipe wall production