Precise polishing mechanism

The utility model discloses a precise polishing mechanism which comprises a machine base, a swing disc, a swing device and a polishing device. The swinging disc is installed on the machine base in a swinging mode, and a penetrating hole is formed in the swinging center of the swinging disc. The swing device is installed on the machine base and drives the swing disc to swing in a reciprocating mode. The polishing device comprises two polishing assemblies and a polishing driving device for driving the polishing assemblies to work, the two polishing assemblies are arranged on the swing disc and located on the two sides of the penetrating hole respectively, and the polishing driving device is installed on the swing disc and is in linkage with the two polishing assemblies. According to the elbow pipe polishing device, the two polishing assemblies can swing around the elbow pipe and polish and grind the two sides of the elbow pipe, so that accurate polishing and grinding of the elbow pipe are achieved, production e