This utility model discloses a
polishing mechanism for the production of automotive semi-circular chuck parts, relating to the field of automotive semi-circular chuck part production technology. It includes a placement frame; a buffer base fixed to the lower inner side of the placement frame; a
polishing body fixed to the upper end of the buffer base; a lifting mechanism installed and connected to the upper inner side of the placement frame; and a sound-absorbing closing mechanism installed and connected to the lower end of the lifting mechanism, located above the
polishing body. When the lifting mechanism extends or retracts, it can change the position of the sound-absorbing closing mechanism to engage and close at the upper end of the polishing body, thereby reducing the
noise caused by internal vibrations of the polishing body.