A 1450 hot strip rolling mill combination vertical roll

Abstract

The invention discloses a combined vertical roll of a 1450 hot strip rolling mill. The combined vertical roll includes a roll shaft, a main body roll cover and a waterproof ring, wherein the main body roll cover is set on the roll shaft, and the main body roll cover and the roll shaft adopt an interference fit, and Through the axial positioning of the main thrust table and the anti-channeling table, the waterproof ring is set under the main roller sleeve on the roller shaft, and the upper end surface of the waterproof ring is close to the lower end surface of the main roller sleeve. The main body roller sleeve and the annular boss in the inner hole of the waterproof ring are axially positioned. In the present invention, the integral vertical roller is divided into three parts: the main body roller sleeve, the waterproof ring and the roller shaft, which is beneficial to the casting of the main body roller sleeve and reduces the turning process. The threaded hole set on the main roll sleeve moves to the center to provide space, so that it can be installed in the inner layer with low hardness, which solves the difficulties of drilling and tapping. The outer layer of the main roll sleeve is made of high-hardness alloy, so that the roll life is longer than The overall vertical roll of ordinary materials is more than doubled.

Description

technical field [0001] The invention belongs to the field of metallurgical equipment parts, and in particular relates to a combined vertical roll of a 1450 hot strip rolling mill. Background technique [0002] Compared with other types of rolling mill vertical rolls, the overall 1450 hot strip mill vertical roll has a special structure. Such as figure 1 As shown, the lower end surface of the vertical roller body has a φ920X180mm long step with a drop of 480mm in diameter from the outer circle of the roller body. It passes through a large arc R60 transition, and the outer end surface of the step has a 70mm deep waterproof groove, which plays the role of sealing and waterproofing. . At the same time, there are 3 groups (6 in total) of evenly distributed M24 threaded holes on the lower end surface of the roller body, which are used to fix the 3 scrapers for cleaning the scale. [0003] Since the vertical roll is used on the 1450 hot strip rolling mill, the outer layer of the...

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Problems solved by technology

[0003]Because the vertical roll is used on the 1450 hot strip rolling mill, the outer layer of the vertical roll must be cast with high hardness alloy during casting, due to the limitation of the centrifugal casting process The φ920X180mm long step on the lower end surface should be cast as a part of the vertical roller, which will not only lengthen the entire blank and increase the ratio of gross to net, but also remove the outer layer of the cast high-hardness alloy, resulting in great waste; at the same time, M24 The threaded hole is located in the working layer of the roller sleeve. For the working layer of the general vertical roller with a hardness of HSD40-50, it can also be drilled and tapped. For the working layer of high alloy material with a hardness of up to HSD70-80, Drilling and tapping are extremely difficult

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