Tension straightening method and device for wide and thick metal plate straightening machine

Abstract

The invention relates to a tension straightening method and a tension straightening device for a wide and thick sheet metal straightener. According to the method, tension rollers are respectivelyarranged on an inlet and an outlet of the straightener to match with the rotation speed of each straightening roller, and an additional tension is produced during the processing of sheet straightening by using speed difference, so that the height of a plasticity area is increased when the sheet is bending and deformed, and the straightening effect is improved. The device consists of inlet tension rollers, an inlet guide roller, the straightener and outlet pinch rollers; the inlet guide roller is arranged at the front end of the straightener; the outlet pinch rollers are arranged at the back end of the straightener; and the inlet tension rollers are arranged at the front end of the inlet guide roller. The tension straightening method and the tension straightening device have the advantages that: the additional tension is provided for the sheet during the straightening process, the sheet is easy to extend; under the premise of the same straightener setting, wider sheet defects can be improved, and capacity of the straightener is increased; and with comprehensive consideration of the additional tension and the radius of sheet bending, load of the straightener is reduced, and the straightener is more safe and low in energy consumption.

Description

【Technical field】 [0001] The invention relates to the technical field of metal sheet straightening, in particular to a tension straightening method and device for a wide and thick metal sheet straightening machine. 【Background technique】 [0002] The straightening of wide and thick metal plates generally adopts a multi-roller straightening machine. Taking wide and thick plates made of steel as an example, 5-roll, 7-roll, 9-roll, 11-roll straightening modes can be used, and the 9 / 5-roll straightening mode is the main one. No matter how the straightening is done, it is fundamentally to achieve the purpose of straightening through the repeated bending of the wide and thick plates in the roll gap of the leveler, that is, the metal plate is straight after straightening. It can be seen that the straightening machine achieves the purpose of improving the shape of the plate by eliminating the internal residual stress of the wide and thick plate, rather than improving the shape of t...

AI Technical Summary

Problems solved by technology

Considering that the straightening machine for wide and thick metal plates is generally driven by work rolls, and the diameter of the work rolls is relatively small, so the structural limitation of the leveler makes this method unable to provide a large tension, and it cannot meet the tension leveling of wide and thick metal plates. Straight request

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