The utility model relates to the technical field of differential shells, and discloses a differential shell spline high-frequency
quenching treatment device which comprises a
chassis, and a placing table is fixedly mounted in the center of the
chassis; and the connecting frame is arranged above the placing table, one side of the connecting frame is connected with the mechanical arm, a mounting frame is fixedly mounted on the other side of the connecting frame, an
inductor and a spraying
pipe are fixedly mounted below the mounting frame, and the spraying
pipe is arranged on the outer side of the
inductor in a sleeving mode. The spraying
pipe is installed on the outer side of the
inductor, after the inductor conducts
induction heating on the differential shell spline, the differential shell spline is immediately subjected to water spraying cooling through the spraying pipe, the spraying pipe is of an annular structure, water conveying pipes are arranged on the periphery of the spraying pipe, clear water can be rapidly and timely conveyed into the spraying pipe, and clear water is sprayed out of spraying holes in the periphery of the inner wall at the same time; and comprehensive cooling
quenching is carried out on the spline surface of the differential shell, and the circulation is carried out, so that the
quenching efficiency and effect are greatly improved.