Narrow-space membrane type wall pipe pipe-end facing machine

The invention relates to a narrow-space membrane type wall pipe pipe-end facing machine, which comprises a clamping device, a feeding device which is movably arranged on the upper part of the clamping device, and a cutting device which is arranged on the feeding device in a matching mode, wherein the cutting device, the feeding device and the clamping device are in split combination design; a mode of arranging a cylindrical gear in the middle from the motor output to a cutting spindle in the cutting device, and the width and length of the cutting spindle part are reduced to the greatest degree; a motor output shaft drives a planet wheel to rotate through a dual gear, low rotating speed is obtained, a feeding transmission rod mechanism in the feeding device drives the cutting device to make feed movement, the feeding device is arranged outside pipe-end space, and machining space occupied by the facing machine is reduced; and moreover, after a machined workpiece, the cutting device, the feeding device and the clamping device are completely assembled, groove preparation can be performed, and the narrow-space membrane type wall pipe pipe-end facing machine is used for machining a narrow-space pipe-end welding groove after holes are formed in the middle of various planar membrane type walls and cylindrical membrane type walls.