Keyway milling device for besides-star wheel

The besides-star wheel key groove milling device comprises a base, a placing assembly and a milling assembly which are symmetrical to each other are arranged on the surface of the base, the placing assembly comprises a rotating block, an arc-shaped protruding block is arranged on the outer side face of the rotating block, a plurality of arc-shaped blocks are annularly and fixedly arranged on the surface of the arc-shaped protruding block, and the milling assembly comprises a second supporting plate. A nail-shaped ejector block is rotatably arranged on the outer side face of the second supporting plate, and a plurality of annular rubber rings different in size are fixedly arranged on the outer side face of the nail-shaped ejector block. The two milling wheels can machine the opposite surfaces of the bell housing at the same time, then the grinding wheels on the two sides are used for grinding the key groove of the bell housing, the bell housing can rotate by a half circle, when the key groove of the bell housi