Welding device for welding aluminum shell and aluminum column

The utility model discloses a welding device for welding an aluminum shell and an aluminum column, which is characterized in that the aluminum column is inserted into the aluminum shell to form a capacitor semi-finished product; the supporting piece is vertically arranged on the stand column in a sliding fit mode and used for supporting the capacitor semi-finished product, and the shielding plate is fixed to the upper end portion of the stand column and provided with an avoiding hole used for avoiding the welding portion of the capacitor semi-finished product. The lifting driving mechanism is connected with the supporting piece to drive the supporting piece to ascend so that the capacitor semi-finished product on the supporting piece can abut against the shielding plate or drive the supporting piece to descend so that the capacitor semi-finished product can be taken and placed conveniently; and the welding robot is used for welding the capacitor semi-finished product clamped between the supporting piece and t