三、手工电弧焊工艺接头型式。为了保证焊透,接头应有坡口。最常用的接头型式有对接接头,角接接头,T接接头和搭接接头如图5所示。(一)焊接规范的选择1.焊条直径:一般焊件厚度越大,选择的焊条直径应该越粗,但焊厚板时对接接头坡口内的第一焊层应用较细的焊条。对根部不要求均匀 Third, manual arc welding process connector type. In order to ensure penetration, the joint should be groove. The most common types of joints are butt joints, corner joints, T joint and lap joint shown in Figure 5. (A) the choice of welding specifications 1 electrode diameter: the general thickness of the weldment, the diameter of the selected electrode should be thicker, but when welding plate butt joint groove within the first welding application of thinner electrode. Do not require uniform roots