Milling machine with grinding function for piston ring milling

The invention discloses a milling machine with a grinding function for piston ring milling. The milling machine comprises a portal frame, a first module, a second module, a bearing machine table, a clamp assembly, a grinding unit and a milling unit. The first module penetrates through the portal frame in a first direction. The bearing machine table is slidably arranged on the first module in the first direction. The clamp assembly is arranged on the bearing machine table and used for positioning and clamping a piston ring. The second module and a grinding assembly are slidably arranged on theportal frame in a second direction. The milling unit is slidably arranged on the second module in a third direction. All pairs of the first direction, the second direction and the third direction areperpendicular. According to the technical scheme, a milling cutter is clamped on the milling unit to mill the piston ring, and a grinding wheel is clamped on the grinding unit to grind the piston ring. Therefore, the milling a