DEVICE FOR A LOCAL VIBRATION TREATMENT OF WELDING SEAMS Russian patent published in 2005 - IPC

FIELD: local vibration treatment of welding seams.

SUBSTANCE: the invention is pertaining to the devices for a local vibration treatment of welding seams and may be used for removal of residual stresses in the metal details mainly having a closed loop of type of pipes, rings, shells made with application of welding. The exciter of vibrations place in symmetry to the plane the welding seam in a zone of the heightened levels of the residual stresses and fix by means of a pin. On the flanges of the body of the vibration exciter by means of covers fix the elastic shell to form a working chamber. The working medium through a coaxially located channel and conjugated with it radial holes is fed in the working chamber. Onto the inlet of the device for vibration treatment of the welding seams by means of the working medium a periodically varying in time pressure is fed from the pressure pump. The pressure developed at that is transferred through the elastic shell to a treated component. The device ensures a purposeful action on those components of the tensor of the residual stresses, which have the greatest levels of stresses and determine the intensity of a stressed state in the dangerous cross-sections. In addition the offered device ensures uniformity of the action along a pipe cross-section perimeter.

EFFECT: the invention ensures determination of levels of the stresses intensity in the dangerous cross-sections as well as uniformity of the action along the pipe cross-section perimeter.

3 cl, 2 dwg