The invention provides a rotating feeding device capable of achieving clamping from the interior of a
pipe end. The device comprises a main shaft, a
servo motor, a
servo reduction
machine, a shifting fork seat, a driving air cylinder, an inner strutting block and an inner strutting triple-jaw, wherein the
servo motor is used for driving the main shaft to rotate, and the driving air cylinder is used for driving the shifting fork seat to perform
reciprocating motion. The shifting fork seat drives a sliding block to be capable of performing inward-and-outward
reciprocating motion in the axial direction of the main shaft while performing inward-and-outward
reciprocating motion,. The inner strutting block and the sliding block are arranged on the main shaft from outside to inside and both can perform inward-and-outward reciprocating motion in the axial direction of the main shaft. The inner strutting triple-jaw is in limited-fit connection with a
machine base. When performing outward movement in the axial direction of the main shaft, the inner strutting block can drive the inner strutting triple-jaw to perform outward expansion in the axial direction of the main shaft and the radial direction of the
machine base, so that the inner strutting triple-jaw props the inner
pipe wall, and the effect that the interior of the
pipe end is clamped and fixed through the inner strutting triple-jaw is achieved. The rotating feeding device has the beneficial effects of being reasonable in structure, high in
machining precision, good in stability, reliable in operation, convenient to adjust and the like.