Powder metallurgy gear grinding device and grinding method thereof

The invention relates to a powder metallurgy gear grinding device and a grinding method thereof, and relates to the technical field of gear machining, the powder metallurgy gear grinding device comprises a workbench and a support fixedly arranged on the workbench, a supporting rod is horizontally and fixedly arranged on the side wall of the support, and a rotating rod is rotationally arranged on the end wall of the supporting rod; a first key block matched with the gear is arranged on the supporting rod, and a second key block matched with the gear is arranged on the rotating rod. An abutting block is arranged on the supporting rod in a sliding mode, a sliding assembly is arranged on the supporting rod, and a rotating assembly is arranged on the support. A grinding table is further arranged on the workbench in a sliding mode, a translation assembly is arranged on the workbench, and a grinding roller and a grinding assembly are arranged on the grinding table. The gear polishing device has the effects that manu