Method for pilger rolling of pipes, rolling mill for its implementation and pipes rolled in accordance with the said method

摘要

The invention relates to the manufacture of pipes. The method forming the subject of the invention is characterised in that the speeds of the forced displacement of the blank 1 with the plug 2 during the forward travel and during the backward travel and the speed of displacement of the blank 1 through the working rolls 3 are varied according to a harmonic law, the forced displacement of the blank 1 during the forward travel and during the backward travel taking place in the same amount of time. The invention makes it possible to increase the production of the rolling mill. <IMAGE>