TUBE GRINDING METHOD Russian patent published in 2000 - IPC

FIELD: working outer surface of extruded tubes with curved axis and eccentricity of its wall. SUBSTANCE: method comprises steps of placing mandrel with stems inside one end portion of tube at grinding process; fixing stems of mandrel in clamps for placing mandrel in zone of grinding wheel arrangement; applying to stems of mandrel tension effort in range of elasticity limit of stem material; mounting tube at least in one chuck; after working a part of tube, clamping its ground end; imparting motion along tube axis to grinding wheel synchronously with mandrel or to tube. Clamping of ground end portion of tube may be realized by means of second chuck when tube is approached to it or by means of first chuck at tilting tube. EFFECT: lowered degree of wall eccentricity of different-length tubes with initial eccentricity of wall including tubes with curved axis. 4 cl, 1 dwg