Patent ID: 9687897
Date: 2017-06-27
CPC Classifications: B21D,G01H,G01M

Claim:
1. An apparatus for impressing a corrugation into a metallic smooth pipe having a corrugating device through which the pipe is moved in a longitudinal direction of the pipe and which produces the corrugation in the circumferential direction of the pipe by rotation, said corrugating device comprising: a corrugator head rotatable about an axis of the head; a hollow shaft on which the corrugator head is firmly fitted and the corrugator head being drivable in rotation on said hollow shaft, said hollow shaft being mounted rotatably on hollow-shaft bearings; and a vibration measuring means fitted on the apparatus and mechanically connected to the corrugating device by means of a direct mechanical connection to the corrugator head and to the hollow shaft, wherein the direct mechanical connection is a rib that holds the corrugating device in a housing, wherein the vibration measuring means is fitted on the outside of the housing in a direction of an axis of the rib, wherein the vibration measuring means is suitable for automatically detecting mechanical vibrations of the rotating corrugating device and for simultaneously detecting measured values for vibrations of the hollow shaft caused by the hollow shaft bearings and measured values for vibrations of the corrugator head caused by balancing thereof, and wherein a display apparatus is coupled to the vibration measuring means for displaying the measured values detected thereby and/or evaluation results based on the measured values is provided.