Inner raceway circular arc groove grinding device for holes

The invention relates to an inner raceway circular arc groove grinding device for holes, and aims to solve the problem of influence on the machining accuracy and quality in the conventional machining method. The inner raceway circular arc groove grinding device comprises a grinding pressure head, guide pillars, a conical sliding shaft with a T-shaped groove guide rail, a sleeve, an end cover, a nut, a lead screw, a cover, a hand wheel, a shell and a positioning block, wherein the positioning block and the shell are fixed together; a contact surface between the positioning block and the tabletop of a machine tool is parallel to the axis of the shell; the conical sliding shaft with the T-grooved guide rail is arranged in a shell hole; more than two guide pillars are uniformly arranged in the T-shaped groove guide rail formed on the conical sliding shaft; the sleeve and the end cover are arranged at the two ends of the shell respectively; one end of the lead screw passes through one end of the sleeve, and is in threaded connection with the conical sliding shaft with the T-shaped groove guide rail; the cover is arranged at the other end of the sleeve; the nut and the hand wheel are arranged at one end, which passes through cover, of the lead screw; the grinding pressure head is arranged on the guide pillars, and can extend out of the outer wall of the shell. The inner raceway circular arc groove grinding device is easy and convenient to operate; the pressure head is convenient to replace; the manufacturing accuracy of a circular-arc groove is easy to control, and the accuracy is high.