Ring riveting device and ring riveting method thereof

The invention discloses a ring riveting device and a ring riveting method thereof. The ring riveting device is used for carrying out ring riveting on a combined gear. The ring riveting device comprises an upper die and a lower die, wherein the end surface of the upper die is provided with a plurality of riveting teeth, the lower die is provided with a die core hole, and shaft teeth of the combinedgear are accommodated in the die core hole for positioning. The axis of the upper die is aligned with the axis of the combined gear, the riveting teeth of the upper die rivet and press the end surfaces of sheet teeth from top to bottom, the riveting teeth rivet and press the peripheries of matching surfaces between the sheet teeth and the shaft teeth to form a plurality of riveting holes, the contact area of the matching positions between the sheet teeth and the shaft teeth is increased, the purpose of increasing axial sliding force is achieved, and the phenomenon that the matching positionsslip and lose efficacy und