Annular part machining device

The invention discloses an annular part machining device. The annular part machining device comprises a chuck used for clamping an annular part, the chuck comprises a plurality of clamping top parts capable of stretching out and drawing back in the radial direction of the chuck, each clamping top part comprises a clamping jaw and an extending part, wherein each extending part comprises a first extending piece fixedly connected with the radial outer end of the clamping jaw and a second extending piece fixedly connected with the first extending piece, protruding towards the radial outer side of the first extending piece and used for abutting against the inner wall of the annular piece, and the length, protruding out of the first extending piece, of the second extending piece is adjustable. 本发明公开一种环形件加工设备，包括用于卡住环形件的卡盘，所述卡盘包括多个可沿所述卡盘的径向伸缩的卡顶部，所述卡顶部包括：卡爪；延伸部，包括与所述卡爪的径向外端固定连接的第一延伸件和与所述第一延伸件固定连接且向所述第一延伸件的径向外侧突出的用于顶住所述环形件的内壁的第二延伸件，所述第二延伸件突出所述第一延伸件的长度可调。