Positioning mechanism, jig and welding equipment

The utility model relates to a locating mechanism, jig and welding equipment, including first locating piece and second locating piece, the first locating piece is used for locating the work piece in the first direction, the second locating piece includes copying piece and drive piece, the copying piece includes copying groove, the copying groove is used for locating the work piece in the second direction, and the drive piece is used for driving the copying piece to move. And the driving piece is used for driving the profiling piece to move in the second direction. According to the positioning mechanism, the jig and the welding equipment, preliminary positioning is conducted on the workpiece through the first positioning piece, secondary positioning is conducted on the workpiece through the second positioning piece, positioning deviation caused by the fact that the deflection angle of the workpiece is too large is avoided, and the workpiece positioning accuracy is improved. 本实用新型涉及一种定位机构、治具及焊接设备，包括第一定位件和第二定位件