Patent ID: 9187796
Filing Date: 2015-11-17
Classification: C21D

Abstract:
1. An inner-diameter quenching device comprising: a workpiece holding assembly for holding a workpiece to be quenched, the workpiece to be quenched having a central axis, and the workpiece holding assembly having a through hole; a spray cylinder disposed at a first side of the workpiece holding assembly and driven by a lifting assembly to move along the central axis into an inner diameter of the workpiece to be quenched; and a heating coil disposed at a second side of the workpiece holding assembly and located on and movable along the central axis; wherein the lifting assembly includes a sucking member which is provided with an assembling space and provided around a peripheral surface thereof with a plurality of sucking apertures in communication with the assembling space, a rotation assembly drives the workpiece holding assembly to rotate about the central axis and includes a shaft, the shaft is a hollow structure formed with an inner space and has a first end formed with an intake portion and a second end connected to the workpiece holding assembly, in the inner space is formed a shoulder portion, and the intake portion is formed with a plurality of intake apertures in communication with the inner space of the shaft, the shaft has the intake portion pivotally disposed on the sucking member in such a manner that the driven portion of the intake portion is inserted through the base, and the intake apertures of the shaft are aligned with the sucking apertures of the sucking member, the spray cylinder is able to move into the inner space of the shaft, the lifting assembly use cooling liquid to push the spray cylinder to move up and down along the central axis.