Welding opening flattening tool

A welding opening flattening tool belongs to the technical field of welding equipment and comprises a tool frame, a tool rest, a flattening tool and a fixing rod. The tool rest is limited and fixed to the head of the tool frame through a fastening bolt and a limiting bolt. The leveling knife is limited in a knife groove of the knife rest through a knife fixing bolt, and the leveling knife is clamped by the fixing bolt and is prevented from being separated from the knife rest; the fixing rod is connected to the tail end of the tool frame and connected with the power stroke device, and the power stroke device provides power and limits the stroke. The tool is simple in structure and convenient and fast to install and use; the tool bit and the supporting arm can be replaced and can be suitable for welding environments with different pipe diameters and welding seams; and the surface shape of the welding seam can be controlled by controlling the shape of the tool bit. 一种焊接口平整工装，属于焊接设备技术领域，包括工装架，刀架，平整刀、固定杆；刀架通过紧固螺栓和