| 摘要 |
PROBLEM TO BE SOLVED: To provide a hardening apparatus capable of uniformly cooling an object to be treated (workpiece) subjected to hardening treatment while reducing a refrigerant used in a hardening tank, and to provide a hardening method capable of freely controlling the cooling speed of the workpiece.SOLUTION: A hardening apparatus 1 comprises a hardening tank 2 having a cylindrical shape and a cylindrical component 3 disposed in a central part of the hardening tank 2 and having an outer diameter smaller than the inner diameter of the hardening tank 2. Nozzles 4A, 4B introducing the refrigerant into the hardening tank 2 are mounted to the hardening tank 2. The hardening apparatus 1 may be configured to mount the nozzles 4A, 4B to an outer peripheral surface of the hardening tank 2 so that the nozzles are parallel to the tangential direction of the cylindrical shape with respect to the outer peripheral surface of the hardening tank 2. The nozzles 4A, 4B may be mounted to a bottom part of the hardening tank 2. In the hardening method using the hardening apparatus 1, an annular component W is fixed in the hardening tank 2, and then the refrigerant is introduced from the nozzles 4A, 4B into the hardening tank 2.SELECTED DRAWING: Figure 1 |
