Special machine tool for milling grooves on cylindrical surfaces of annular parts

The invention provides a special machine tool for milling grooves on the cylindrical surfaces of annular parts. The special machine tool comprises a vertical sliding table, a cross sliding table is arranged on the vertical sliding table, the cross sliding table vertically and flatly slides on the vertical sliding table, a work tool division rotary table for clamping work tools is fixed on the vertical sliding table, the rotation shaft of the work tool division rotary table is arranged in the vertical direction; a rotary column seat is arranged on the cross sliding table, the rotary column seat slides on the cross sliding table horizontally and flatly, the rotary column seat is connected to a rotary column, the rotation shaft of the rotary column is flatly arranged in the vertical direction, a main shaft box is arranged on the rotary column and is provided with a main shaft for installing milling cutters, the rotation shaft of the main shaft is flatly in the vertically direction, and the main shat box slides on the rotary column along the direction which is perpendicular to the rotation shaft of the rotary column. The provided special machine tool can rapidly process grooves on the cylindrical surfaces of annular parts, the function of the machine tool is single, the structure is more compact, the manufacture cost is lower, and thus the machine tool is economic and practical.