Bellows rolling mill

A corrugating rolling mill is provided. A dog part of the utility model is provided with a rolling knife radial feed adjuster, the utility model is characterized in that the dog part is provided with a rolling knife radial synchro feed adjuster, which is a radial synchro feed device with a drive mechanism, wherein, the radial synchro feed device comprises a turntable, a plurality of curved bales, a moveable guide pole, and a rolling knife assembly, the curved bale is fixed on the turntable evenly, the curved bale contacts with the moveable guide pole, which connects with the rolling knife assembly in a mechanism way. In addition, the utility model is also arranged with an axial microscale adjuster for the rolling knife and a fine adjuster for a helix angle, makes the radial synchro feed of the rolling knife, the adjustment for an axle direction and the helix angle convenient and precise, has precise fin pitch of a rolled heat transmitting pipe, has regular beauty, even the thickness of the pipe wall, thereby increasing the productivity effect and the rate of finished products, and having high practicality.