Tempering device for bolt production

The utility model relates to the technical field of tempering devices, and provides a tempering device for bolt production, which comprises a support frame and a tempering assembly, an outer shell is movably arranged above the support frame, a gear ring is arranged in the middle of the outer surface of the outer shell, and a gear is arranged in the gear ring. Sealing pieces are fixedly installed on the portions, located on the outer shell, of the left side and the right side of the upper end and the lower end of the gear ring, an inner cavity is formed in the outer shell, a tempering assembly is arranged in the inner cavity, a motor is fixedly installed on the portion, located on the supporting frame, of the lower portion of the outer shell, and the motor is electrically connected with an external power source. By means of the technical scheme, the problems that in the prior art, when tempering treatment is conducted, bolts are often stacked together, consequently, single bolts are heated unevenly, the streng