论文部分内容阅读
1.基本要领(1)彻底检查待焊区域及裂纹的起点和终点。并要在裂纹起点和终点延长线的2～3mm处各钻直径4～6mm的止裂孔,对于长裂纹,还应在裂纹段中间不同部位钻孔以减小焊接应力。(2)综合考虑应力、变形、操作难易程度及焊件厚度、焊接位置和焊条直径等情况,制备相应的坡口。在此过程中,一要彻底铲除裂纹附近的金属并清除坡口及其边缘的毛刺、杂质和氧化皮等,保证露
1 basic essentials (1) thorough examination of the region to be welded and crack start and end points. And crack initiation and end of the extension line 2 ~ 3mm at the diameter of drilling holes 4 ~ 6mm, for long cracks, but also in the middle of the crack in different parts of the hole to reduce the welding stress. (2) Considering the stress, deformation, ease of operation and thickness of weldment, welding position and electrode diameter, etc., prepare the corresponding groove. In the process, one must completely eliminate the metal near the crack and remove the burr, impurities and scale on the groove and its edge,