Welding tool for vehicle frame

The invention relates to the field of vehicle frame welding, in particular to a tool for vehicle frame welding. The tool comprises a main plate, and a supporting positioning piece, a first limiting piece and a second limiting piece are connected to the main plate; the supporting and positioning piece comprises a first supporting block, a third supporting block, a fourth supporting block, a second supporting block and a fifth supporting block, the first limiting piece comprises a second limiting frame, a first limiting frame and a third limiting frame, and the second limiting piece comprises a fourth limiting frame, a fifth limiting frame and a first positioning column; and the fourth limiting frame and the fifth limiting frame are located between the third supporting block and the fourth supporting block. The welding device has the effect of improving the accuracy of the welding position. 本发明涉及车架焊接领域，尤其是涉及一种车架焊接用工装包括总板，所述总板上连接有支撑定位件、第一限位件和第二限位件；支撑定位件包括第一支撑块、第三支撑块、第四支撑块、第二支撑块和第五支撑块，第一限位件包括第二限位架、第一限位架和第三限位架，第二限