AUTOMATIC TUBE EXPANDING DEVICE

The invention provides an automatic pipe expanding device capable of improving the pipe expanding operation efficiency. The automatic pipe expanding device comprises a pipe expanding device body for expanding the pipe and a manipulator for moving the pipe expanding device. The pipe expanding device body is provided with: an expander having a core rod having a tapered portion having a small diameter on the tip side formed on the outer peripheral surface thereof, a frame member having a tubular shape and fitted over the core rod so as to be slidable and rotatable, and a plurality of rollers held by the frame member so as to be rotatable and disposed obliquely with respect to the axial direction; a rotation driver that rotationally drives the core rod; a clamping device used for clamping the frame member of the expander; a moving device that enables the clamping device to move in the axial direction of the expander; and a position sensor that detects the position of a support member provided at the tip of the mo