Rapid self-centering clamping device for large-sized bearing ring workpiece

The invention discloses a rapid self-centering clamping device for a large-sized bearing ring workpiece. The rapid self-centering clamping device for the large-sized bearing ring workpiece comprises an underframe, a support table, a centering mechanism, a positioning and clamping mechanism and a pressing mechanism. According to the rapid self-centering clamping device for the large-sized bearing ring workpiece provided by the invention, through the centering mechanism, the bearing ring workpiece can be quickly centered and preliminarily clamped; six positioning claws of the positioning and clamping mechanism are uniformly clamped in six directions of the workpiece, and the workpiece is uniformly stressed by adopting a synchronous coaction and single-step fine adjustment manner, so that theworkpiece is positioned and clamped in the horizontal direction; through three pressing clamping jaws of the pressing mechanism, the workpiece is finally pressed and fixed in the perpendicular direction; through the actions