Importance

Loading Importance Indicators...

Abstract

Pipe-welding apparatus with a centering device for centering the pipe-welding apparatus relative to a pipe which is to be welded to an end-plate. The centering device is provided with a tubular center part which supports two pairs of sleeves arranged axially next to one another, the one sleeve in each pair being rigidly connected to the center part and the other sleeve being slidingly displaceable along the center part. A number of balls located between the sleeves in each pair of sleeves is arranged to interact yieldingly with the mutually facing end surfaces of the pair of sleeves, the axial separation of which increases in the direction towards the periphery of the device. The displaceable sleeve is located in a spring sleeve which is mounted on the center part and encloses a spring arranged to press the displaceable sleeve towards the fixed sleeve, the spring sleeve being mounted at a fixed distance from the end surface of the fixed sleeve, which distance is smaller than the diameter of the balls.

Loading the Abstract Image...

First Claim