Square tube welding fixture

The invention discloses a square tube welding fixture. The device comprises a base plate, a limiting plate group, a positioning plate and a welding positioning head, the limiting plate group is fixedly mounted on the base plate; the welding positioning head and the positioning plate are fixedly installed on the two sides of the limiting plate set correspondingly. A workpiece fixing assembly is further fixedly installed on the base plate. The first workpiece is fixed through the limiting plate set and the workpiece fixing assembly, and the second workpiece is positioned through the welding positioning head, so that the positioning precision of the welded workpiece is improved, the welding precision is improved, the workpiece is clamped through the clamp, a worker is prevented from making direct contact with the high-temperature welded workpiece, and protection is further provided for the worker. 一种方管焊接夹具，包括底座板、限位板组、定位板和焊接定位头，限位板组固定安装在底座板上，焊接定位头和定位板分别固定安装在限位板组的两侧，在底座板上还固定安装有工件固定组件，通过限位板组和工件固定组件对第一工件进行固定，通过焊接定位头