Material positioning device for gantry machining

The utility model discloses a material positioning device for gantry machining. The material positioning device comprises a gantry crane, the bottom of the fixing mechanism is fixedly connected with the top of the gantry crane, the fixing mechanism comprises a crane supporting plate, fixing columns, fixing rods, connecting rods, sliding rods and a workbench, the fixing columns are fixedly connected to the four corners of the top of the crane supporting plate, the fixing rods are fixedly connected to the tops of the fixing columns, and the connecting rods are fixedly connected to the tops of the sliding rods. And the inner side of the fixed rod is fixedly connected with a connecting rod. The direct-current motor, the movable rod, the threaded sleeve, the crawler belt, the threaded rod, the motor fixing plate, the base plate and the workbench are used in cooperation, the direct-current motor is started to drive the movable rod to rotate, the movable rod rotates to drive the threaded sleeve to rotate through the