Universal mill horizontal roll assembling structure and matching and assembling method

Abstract

The invention relates to a universal mill horizontal roll assembling structure which comprises a roll shaft and a roll ring. A boss is arranged on the outer circle surface, in contact with the roll ring, of the roll shaft, and an annular groove matched with the size of the boss is formed in the corresponding inner circle surface of the roll ring. A matching and assembling method of the assembling structure comprises the steps that (1) the assembling size is measured after the roll shaft is machined; (2) the roll ring is matched; (3) the roll ring is heated; (4) preparation is carried out before hot assembling; (5) hot assembling is carried out on the roll shaft; (6) a horizontal roll is naturally cooled. Compared with the prior art, the assembling structure and the method have the advantages that the roll shaft and the roll ring are provided with the boss and the annular groove respectively, and the situation that the assembled roll ring axially moves due to too large interference magnitude is avoided; the roll ring is matched according to the actual size of the roll shaft, the interference magnitude is properly reduced on the premise of guaranteeing close connection of the roll shaft and the roll ring, and the situation that the assembled roll ring is expanded and cracked due to the too large interference magnitude in the use process is avoided; the boss of the roll shaft and the assembling faces on the two sides of the annular groove of the roll ring are designed to be different in size and diameter, and smooth assembling is facilitated.

Description

technical field [0001] The invention relates to the technical field of universal rolling mill accessories manufacturing, in particular to a universal rolling mill horizontal roll assembly structure and a matching and assembling method. Background technique [0002] The universal rolling mill consists of a pair of horizontal rolls and a pair of vertical rolls to form the main frame. The horizontal roll is a driving roll, which can process four sides of the rolled piece. It is called a universal rolling mill because it is suitable for rolling various types of steel. Due to the difficulty and high cost of universal rolling mill overall manufacturing, at present the world usually adopts nested combined rolls, that is, horizontal rolls are assembled from roll rings and roll shafts. This form of horizontal roller can not only ensure wear resistance and toughness at the same time, but also can be used repeatedly. [0003] The assembly of combined rolls adopts the hot-fitting metho...

AI Technical Summary

Problems solved by technology

In actual use, the effect of the assembly of the roll shaft and the roll ring is mainly determined by the assembly interference. If the interference is too small, the roll ring will thermally expand as the temperature of the roll rises during hot rolling, resulting in loose assembly and making the roll ring Axial movement occurs along the roller shaft; when the interference is too large, the roll ring will crack due to excessive internal stress, causing the roll ring to break quickly

Images