Replacing method for high-speed wire finishing mill roller box bearings

Abstract

The invention relates to a replacing method for high-speed wire finishing mill roller box bearings including an angular contact bearing and a roller box oil film bearing. The replacing method is characterized by including the steps: firstly, manufacturing a drawing device for the angular contact bearing; secondly, disassembling an eccentric bushing and the angular contact bearing; thirdly, manufacturing a simple press device for disassembling and assembling the oil film bearing; fourthly, disassembling the oil film bearing of the eccentric bushing on a working side; fifthly, disassembling the oil film bearing of the eccentric bushing on a transmission side; sixthly, mounting the oil film bearing; seventhly, assembling a roller shaft; eighthly, assembling the angular contact bearing; ninthly, assembling a press cover of the angular contact bearing. The assembly efficiency of a high-speed wire (preliminary) finishing mill roller box is improved, the probability of damage and scrap of assembly spare parts caused by an assembly method is reduced, the cost of the spare parts is saved, and labor intensity is reduced.

Description

technical field [0001] The invention relates to a replacement method, in particular to a replacement method for a roll box bearing of a high-line finishing mill. Background technique [0002] There are three types of roll boxes for double-high line (pre) finishing mills in rolling mills of metallurgical enterprises. The roll box is mainly composed of a roll box body, two gear roller shafts, two sets of drive side angular contact bearings, two sets of working side oil film bearings, two sets of drive side oil film bearings, two eccentric sleeves, a set of roll gap adjustment mechanism, Two sets of roller ring locking mechanisms are composed of two anti-stacking blocks. [0003] The working principle of the roll box is that two eccentric sleeves are installed in the roll box body. Driven by the roll gap adjustment mechanism, it can rotate a certain angle in the center of the roll box body, so as to achieve the change of the center distance of the gear roller shaft. There is ...

AI Technical Summary

Problems solved by technology

The traditional method of dismantling rolling bearings is to bake them with a baking gun and connect them with a horse. The traditional dismantling method has the characteristics of instability and low work efficiency. Irreparable damage to journals, which often affects the useful life of the equipment even if repairs are possible

However, the traditional disassembly and assembly of oil film bearings is to directly beat with a sledgehammer and pads, which will cause great damage to the eccentric sleeve, and the assembly of oil film bearings in this way will often cause the oil film bearings to be knocked due to the unstable factors of beating the sledgehammer. If it is damaged or cannot be installed, it seriously affects the assembly efficiency of the high-line (pre) finishing mill roll box, increases the probability of damage and scrapping of assembly parts due to the assembly method, and greatly increases the cost of spare parts and labor intensity

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