Method for making antivibration bar

Details Method for making antivibration bar Method for making antivibration bar

1988-01-14

1989-03-21

Echols, P. W.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291573R, 29557, 122510, 165 69, 165162, B21D 5302

Patent

active

048131172

ABSTRACT:
A method is disclosed for making an apparatus for substantially eliminating flow induced vibrations of the flow tubes of a steam generator in the U-bend region. Antivibration bars are provided between columns of flow tubes in the U-bend region which are contoured on one side to correspond with the exact as-built and as-bent diameter of the tubes as located within the tube bundle. Measurements of the actual flow tube diameters are made and recorded and stored either on tape or in a computer which is then used to control a numerically operated machine which configures or machines cutouts in the antivibration bars to precisely correspond with the respective measured diameters of the flow tubes. Only one side of the antivibration bars need to be machined because of the flexibility of the flow tubes which allow the positioning of the other side of the flow tubes along a flat plane.

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patent: 4619315 (1986-10-01), Waryasz

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