Cross shaft batch grinding production line

The utility model discloses a universal joint pin batch grinding production line which comprises a controller, a transposer, a grinder and a discharger. The transposer, the grinder and the discharger are respectively and electrically connected with the controller. The transposer comprises a material changing machine table and a plurality of material stacking frames, wherein the top of the material changing machine table is provided with a rotating disc driven by a first material changing motor to rotate, and the material stacking frames are rotationally connected to the edge of the top face of the rotating disc and driven by a second material changing motor to rotate. The stacking frame comprises a base, a pair of vertical rods connected to the top face of the base in a sliding mode and a sliding driving mechanism for driving the two vertical rods to be close to or away from each other. The grinder comprises a grinding machine table, a height adjusting mechanism, a pressing plate, a grinding air cylinder, a f