Universal machine core of rolling mill

Abstract

The invention discloses a universal machine core of a rolling mill. The universal machine core of the rolling mill comprises an upper horizontal roller and a lower horizontal roller, wherein two ends of the upper horizontal roller are respectively matched with two upper bearing seats in a rotating manner, and two ends of the lower horizontal roller are respectively matched with two lower bearing seats in a rotating manner; and the machine core further comprises a quick roller exchanging device, wherein the quick roller exchanging device comprises a roller exchanging trolley, and is characterized in that: a lower horizontal roller positioning rod and an upper horizontal roller positioning rod are fixed on the roller exchanging trolley, and are distributed at the left side and the right side of a roller gap, counter bores are correspondingly formed on the upper bearing seats respectively, and are used for containing the upper end of the upper horizontal roller positioning rod, depth of the counter bores is D2, when the rolling mill is in a roller exchanging state, the distance from a lower roller surface of the upper horizontal roller to a rolling line is D1, and D2 is smaller than or equal to D1. As the upper horizontal roller is smaller than or equal to the lowest rolling position during the exchange of the rollers, the entire roller group can be reliably supported on the roller exchanging trolley, so that motions of respective rollers in the range of the whole stroke do not interfere with each other when the rolling mill is in operation, and therefore the operation is simple, reliable and safe.

Description

technical field [0001] The invention relates to a universal rolling mill, in particular to a core therein. Background technique [0002] The universal rolling mill core is generally composed of a roll group consisting of a horizontal roll system and a vertical roll system, and a roll changing trolley for supporting the roll group. During the rolling process of the universal rolling mill, the rolls wear out quickly, and the rolls need to be replaced frequently. The roll change process requires: during the roll change operation, the bearing housings of the upper and lower horizontal rolls of the roll group and the bearing housings of the left and right vertical rolls It needs to be supported and placed on the roll changing trolley to form a whole. After the rolls are assembled into the rolling mill, the upper and lower horizontal rolls can freely move up and down within the range of the frame window and the left and right vertical rolls can move freely in the horizontal direct...

AI Technical Summary

Problems solved by technology

However, the structure of the roll group in this way, when the working state is converted to the roll changing state again, because the spring has no active driving force, and the roll group is in the rolling mill frame, people cannot reach it, and the slider cannot be placed in the initial changing position again. The support state of the rolls and the support reliability of the roll group become poor, which is prone to safety accidents, and under harsh working conditions, the operation is inconvenient and the maintainability is poor, making it difficult for this structure to be effectively used at the rolling site

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