Flattening device for welding end face of automobile silencing inner pipe

The utility model belongs to the technical field of welding. The utility model relates to a flattening device, in particular to an automobile silencing inner pipe welding end face flattening device. Bearing comprising workpiece identification, a front end positioning guide pin is fixedly mounted at the upper end of the workpiece identification bearing; a cross rod is mounted above the front end positioning guide pin; a profiling clamping mold is mounted below the workpiece identification bearing; an adjusting plate is fixedly mounted on one side of the profiling clamping mold; an adjustable clamping cylinder is movably mounted on one side of the adjusting plate; a pressing degree adjusting screw rod is movably mounted on one side of the adjustable clamping air cylinder; a positioning sleeve is fixedly mounted on the inner surface of the profiling clamping mold; the flattening device for the welding end face of the automobile silencing inner pipe is provided with the balance supporting legs, the ventilation pl