在机械制造和设备维修中,经常发生螺钉、钻头和丝锥断裂的现象,用焊接法取出断螺钉是一种简便易行的办法。1.焊接方法(1)堆焊时焊接电流要选得小一些,并先在断口中心以碰击法引弧,再以不断灭弧法进行堆焊。(2)如果螺孔坚直向上,焊接时较容易。在堆焊时,从边缘向中心以圆圈形运条,圆圈大小根据断丝直径大小而定。断丝直径小,则圆圈亦小;断丝直径大则圆圈亦大。每次灭弧后应立即清渣,并 In the machinery manufacturing and equipment maintenance, often screw, drill and tap broken phenomenon, using the welding method to remove the broken screw is a simple and easy way. 1. Welding method (1) Welding current to be selected when the welding is smaller, and the first in the fracture center arc hit the law, then continue to arc welding method surfacing. (2) If the screw hole is straight up, welding is easier. In surfacing, from the edge to the center of the circular transport bar, the size of the circle according to the broken wire diameter. Broken wire diameter is small, the circle is also small; Broken wire diameter is also large circle. After each arc should be cleared of slag, and