Ring-removing mechanism for single-head large-cylinder-diameter nodular cast iron piston ring

The invention discloses a ring-removing mechanism for a single-head large-cylinder-diameter nodular cast iron piston ring, and belongs to the technical field of piston ring machining. A workbench is vertically provided with at least three supporting rods in a fixed manner, and the supporting rods support one horizontal cover plate. The center of the cover plate is connected with a telescoping rod which passes through a vertical impact cylinder in a central hole of the cover plate. An inner side of a space formed by the enclosing of the supporting rods is provided with a rear baffle plate in a vertical manner. The workbench is also fixedly provided with a horizontal clamping cylinder, and the tail end of the telescoping rod is fixedly connected with a front baffle plate. When the horizontal clamping cylinder shrinks, the front baffle plate and the rear baffle plate surround a piston ring blank disposed between the front and rear baffle plates. The mechanism provided by the invention can enable the ring removal of the single-head large-cylinder-diameter nodular cast iron piston ring to be completed conveniently and reliably, reduces the rejection rate, and reduces the labor intensity of workers.