WORK-COIL OF HIGH-FREQUENCY HEAT TREATMENT FOR A ROD OF HYDRAULIC CYLINDER

摘要

The present invention relates to a work coil for high frequency heat treatment of a hydraulic cylinder rod. In the work coil, a cooling coil with the same diameter as a high frequency coil is connected to the high frequency coil by a plurality of connection units to match the hollow part of the high frequency coil with the hollow part of the cooling coil. Spraying holes are bored toward the center of the cooling coil to vertically spray cooling water sprayed from the spraying holes of the cooling coil to the outer surface of a hydraulic cylinder rod. In the work coil for the high frequency heat treatment of a hydraulic cylinder rod, a pair of connection rods (15, 17) is connected to a first electrode terminal (11) and a second electrode terminal (13) between the first electrode terminal (11) and the second electrode terminal (13). The ring-shaped high frequency coil (30) is connected to the connection rods (15, 17). A cooling water supply pipe (19) and a discharge pipe (21) are connected to the connection rods (15, 17), respectively. The cooling coil (40) with the same diameter as the high frequency coil (30) is connected to the high frequency coil (30) by the plurality of connection units (50) to match the hollow part of the high frequency coil (30) with the hollow part of the cooling coil (40). A plurality of spraying holes (43) are formed on the inner surface (41) of the cooling coil (40), and are bored toward the center of the cooling coil (40).