CONTINUOUS TUBE ROLLING METHOD AND MANDREL ASSEMBLY FOR THE IMPLEMENTATION THEREOF

• Main Authors: MAMCHENKO Vladislav Anatolyevich, CHERNYKH Ivan Nikolaevich, PYATKOV Vladimir Leonidovich, TOPOROV Vladimir Alexandrovich, PYSHMINTSEV Igor Yuryevich, PYANKOV Boris Grigoryevich, STRUIN Dmitriy Olegovich, LUBE Ivan Igorevich, KUZNETSOV Alexander Nikolaevich, LOKHANOV Dmitriy Valerievich, TRUTNEV Nikolay Vladimirovich, KLACHKOV Alexander Anatolyevich, VYDRIN Alexander Vladimirovich, SHKURATOV Evgeniy Alexandrovich, ERSHOV Igor Anatolyevich, GOROZHANIN Pavel Yuryevich
• Format: Patent
• Language: English; Spanish
• Published: 17.08.2020
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; TRANSPORTING

A method for rolling tubes on a continuous tube rolling mill involves deforming a tube billet using a mandrel assembly. The mandrel assembly comprises a cylindrical mandrel configured such that its ends can be alternately coupled to an attachment of the mandrel assembly. The mandrel is configured such that its ends have portions with a beveled lateral surface, wherein the angle of the generatrix of said surface to the longitudinal axis of the mandrel is between 10 and 70 degrees. The deformation of tube billets is carried out until the amount of wear on the working regions at both ends of the mandrel is not less than 25% of a critical value, then the mandrel is sharpened. The invention increases the service life of a mandrel, reduces the formation of flaws on the inside surface of the tubes, and prevents accidents from occurring during the rolling process. Un método para laminar tubos en un laminador de tubos continuo consiste en deformar un tocho de tubo usando un ensamble de mandril. El ensamble de mandril comprende un mandril cilíndrico está configurado de tal manera que sus extremos se puedan acoplar de forma alternante a un accesorio del ensamble de mandril. El mandril está configurado de tal manera que sus extremos tengan porciones con una superficie lateral biselada, en donde el ángulo de la generatriz de dicha superficie con respecto al eje longitudinal del mandril está entre 10 y 70 grados. La deformación de los tochos de tubo se lleva a cabo hasta que la cantidad de desgaste en las regiones de trabajo en ambos extremos del mandril no sea inferior al 25% de un valor crítico, luego se afila el mandril. La invención aumenta la vida útil de un mandril, reduce la formación de fallas en la superficie interior de los tubos y evita que ocurran accidentes durante el proceso de laminado.