AN INVESTIGATION ON INFLUENCE BY WEAR OF PLUGMLL GROOVE ONTUBE W. T. ACCURACY

Based on the measurement of the rolled piece perimeter,correction was made to the method for calculation of the working diameter of the roll.An investigation on the influence by the uneven wear of the roll groove on the tube W.T. accuracy and the pipe manufacturing course is made,based on which measures for improving the W.T. accuracy and the groove service life are proposed.