Carbon planing and back chipping free welding method for thick plate penetration welding H-type steel

The invention discloses a carbon planing and back chipping free welding method for thick plate penetration welding H-type steel. The method is characterized in that through the groove clearance, the groove angle, welding and locating and reasonable application of a grinding and slag removal tool, the traditional method of front face groove welding, back face carbon planing and back chipping grinding and back face penetration welding is changed, and the method of reserving a clearance between a flange and a web plate and achieving front face groove welding, back face grinding for removing welding slag and back face penetration welding is adopted; and the method of clearance reserving and back face grinding is adopted for replacing the welding process of back face carbon planing and back chipping grinding, planing defects such as carbon inclusion, slag bonding, copper spots, burnthrough and irregular planing trough sizes and shapes caused by carbon planing and back chipping are avoided,and the problems of high