CENTERING ROLLER-TYPE APPARATUS OF TUBE ROLLING MILL

FIELD: roller type centering apparatuses for enlarging possibilities of blank centering in tube rolling mill. ^ SUBSTANCE: centering apparatus includes housing; jointly mounted in housing rocking two-arm lever with upper centering roller; jointly coupled one to other through timing tie rod two-arm and three-arm levers with lower centering rollers; drive unit for closing and opening lever arms; screw type limiter of roller positions. Effective adjustment of equipment to desired size, extraction of pierced billet from upward and from lateral side are provided due to improved design of centering apparatus. The last has hydraulic cylinder whose body is mounted on arm of rocking two-arm lever with upper centering roller and whose rod is jointly coupled with three-arm lever carrying lower centering roller. Screw type limiter of centering apparatus is provided with electromechanical drive and it is mounted in housing with possibility of engaging with stop placed on timing tie rod. ^ EFFECT: improved design of centering apparatus, enlarged possibilities of blank centering. ^ 3 dwg