The method of producing the rolled tube between joint athermal in the continual tube rolling mil

摘要

While as for this invention, as for the hot hollow block which is formed beforehand in regard to the method of producing the joint non tube, in perforation mil 1, in order to form the parent tube being pulled on the mandrel bar by continuous rolling mil 2, without finishing the extraction mil and the re-furnace, it finishes the parent tube and, the giving sending it makes directly the tensile reduction diameter mil or sizing mil 5 as a mil, there, it is rolled to the finished tube diameter which is needed. Just single layer, it is formed while the pulling in the continuous rolling mil, finishes during succeeding finish rolling as the parent tube layer which is needed, and the parent tube is pulled is turned off from the mandrel rod by rolling, rolling, to handle single more uses the rolling mil component which is designed in order at the size and in order to be executed, hollow block size is decided beforehand in the layer of hollow block. Selective figure Figure 2