Finishing boring machine for high-precision wheel hub hole

A finishing boring machine for a high-precision wheel hub hole, comprising:

• a boring machine body, a hydraulic automatic centering fixture, a computer numerical control (CNC) vertical sliding table, a spindle box, a CNC facing head, and a cutter assembly, wherein
• the boring machine body is a main structure of the finishing boring machine, and is configured to support the finishing boring machine;
• the hydraulic automatic centering fixture is arranged on the boring machine body and is configured to place a to-be-processed workpiece;
• the CNC vertical sliding table is arranged on the boring machine body and is configured to control the spindle box, the CNC facing head and the cutter assembly to move up and down;
• the spindle box is arranged on the CNC vertical sliding table and is configured to control rotation speeds of the CNC facing head and the cutter assembly;
• the CNC facing head is arranged on the spindle box and is configured to control a horizontal distance between the cutter assembly and the to-be-processed workpiece;
• the cutter assembly is arranged on the CNC facing head and is configured to process the to-be-processed workpiece;
• and
• the CNC facing head comprises an alternating current (AC) servo motor, a driving shaft, a ball screw, a sliding member, and a linear guide;
• the AC servo motor is connected with the driving shaft through a coupling;
• and the sliding member is fixedly connected with the ball screw, and the driving shaft is engaged with the ball screw, so as to drive the ball screw and the sliding member and move the cutter assembly on the linear guide.