安装热力设备时,需要焊接大量的57×3.5,76×4,89×5和106×6毫米的不锈钢管,因此,管端加工的工作量很大。焊前的准备工作包括制作图1所示的倒角。准备此种倒角时要对管子的内外壁和端面 Installation of thermal equipment, the need to weld a large number of 57 × 3.5,76 × 4,89 × 5 and 106 × 6 mm stainless steel pipe, so the pipe end of the workload. Preparations before welding include making the chamfer shown in Figure 1. Prepare this kind of chamfering on the inner and outer walls and the end face of the pipe