Disassembling method for roll bearing and eccentric hanger of roll bearing

Abstract

The invention relates to the field of PQF tandem mill roll maintenance and particularly relates to a disassembling method for a roll bearing and an eccentric hanger of the roll bearing. The disassembling method provided by the invention has the characteristics that the eccentric hanger is adopted to offset the eccentric state of barycenter of a bearing box, so that the bearing box can be correctly hanged in an automatic way during the disassembling process of the bearing without the help from a worker. The disassembling method comprises the following steps of: 1, positioning the bearing box and the eccentric hanger in a matching manner; 2, putting a backing ring in a gland seam allowance of the bearing box; 3, hanging the bearing box and putting the bearing box on a press head of a hydraulic press; 4, starting the hydraulic press and leading the bearing box to rise to push against a top bar of the hydraulic press; and 5, continuously starting the hydraulic press and ejecting the bearing. The eccentric hanger comprises a support press plate, a connecting rod and a ring; and deviation valve H of the axle wire of the connecting rod from the axial wire of the support press plate is consistent with the deviation vale of the barycenter of the bearing box from the axis of a roll. Compared with the prior art, the beneficial effects of the invention are that the disassembling method is more convenient and easier to operate, can reduce labor intensity of operators, can improve the work efficiency and can ensure the safety of operators and equipment.

Description

technical field [0001] The invention relates to the field of roll maintenance of a PQF continuous rolling mill, in particular to a method for dismounting a roll bearing and an eccentric spreader. Background technique [0002] The PQF continuous rolling mill is a 6-stand three-roll rolling mill imported from Germany. It is the main equipment on the φ177 hot-rolled seamless steel pipe production line. The rolling device of the continuous rolling mill is an important tool for rolling seamless steel pipes, and the assembly precision of the rolling device is extremely high. , especially the amount of axial and radial movement of the rolled roll after assembly, the quality of its assembly directly affects the quality of the seamless steel pipe product, so the roll device must be checked after the roll is rolled on-line for a cycle (3-5 days). Overhaul to ensure that the rolling process requirements are met. [0003] The conventional maintenance method is that three fitters are re...

AI Technical Summary

Problems solved by technology

[0012] The disadvantage of the above disassembly method is that since the center of mass of the bearing box deviates from the axis of the roll, the bearing box is skewed when the bearing is disassembled, and it must be straightened by hand. unsafe

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