Four-roll plate bending machine

Abstract

The invention relates to a four-roll plate bending machine comprising an upper crossbeam, an upper-roll bearing seat plate and upper rolls. The upper beam is fixed on a left and right frame of the plate bending machine, the upper-roll bearing seat plate is fixed under the upper crossbeam, and the upper rolls are fixed under the upper-roll bearing seat plate. Each upper roll is composed of an upper-roll shaft and upper-roll units, and the upper-roll units are sequentially connected and sleeved on the upper-roll shaft. Each upper-roll unit comprises an upper-roll bearing seat, an upper-roll bearing and small upper rolls, the upper-roll bearing and the small upper rolls are arranged in the upper-roll bearing seat. Each upper-roll bearing is sleeved on the upper-roll shaft, and two sides of each upper-roll bearing are respectively provided with the small upper rolls. The upper rolls are designed to be composed of the upper-roll units short in length, so that large deflection caused by large span when the upper rolls are longer in length is avoided, and deformation due to deflection is reduced. Besides, the upper rolls different in length can be designed according to number of the upper-roll units, and accordingly, the four-roll plate bending machine is flexible in structure.

Description

technical field [0001] The invention relates to a plate rolling machine, in particular to an upper roll structure of a four-roll plate rolling machine. Background technique [0002] At present, the deflection compensation of the upper roll of the plate rolling machine is that the upper roll is designed to be very long, and an anti-deformation preload is applied to both ends of the upper roll. The disadvantage of this method is that the compensation effect in the middle of the upper roll is not good, and the machine The overall structure increases and the cost increases. In a large-scale plate rolling machine, the width of the rolled plate is large, and the span of the fulcrum of the upper roll is large, the deflection and deformation of the upper roll will become larger, and the rolling accuracy of the workpiece is difficult to guarantee. Contents of the invention [0003] The invention overcomes the deficiencies in the prior art and provides a four-roller plate rolling m...

AI Technical Summary

Problems solved by technology

[0002] At present, the deflection compensation of the upper roll of the plate rolling machine is that the upper roll is designed to be very long, and an anti-deformation preload is applied to both ends of the upper roll. The disadvantage of this method is that the compensation effect in the middle of the upper roll is not good, and the machine The overall structure is enlarged and the cost is increased

In a large-scale plate rolling machine, the width of the rolled plate is large, the fulcrum span of the upper roll is large, the deflection deformation of the upper roll will become larger, and the rolling accuracy of the workpiece is not easy to guarantee

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