Cold straightening process for high-strength thin plate

Abstract

The invention discloses a straightening process for a high-strength thin plate. The problem that the head of a steel plate collides with a straightening roll when the steel plate is bit in the large-rolling-reduction straightening process is avoided by adopting the method of firstly biting steel plate and then arranging roll bites. The problem that the steel plate cannot come in due to overlarge head-tail warpage amount in the subsequent straightening process is solved by positioning the head and tail of the steel plate in the straightening process. The straightness of the steel plate is improved through the straightening process of arranging the multi-pass progressive-decreasing type roll bits, and meanwhile the distribution of the internal stress of the steel plate is more uniform.

Description

technical field [0001] The invention belongs to the field of steel rolling, and relates to a cold straightening process for thin and high-strength plates. Background technique [0002] The use of thin-gauge high-strength plates (steel plate thickness less than 6mm, yield strength greater than 1000MPa) in the mechanical manufacturing process can not only reduce the weight of the product, but also save the amount of steel used on the premise of meeting the strength requirements. However, the production of thin-gauge high-strength plates is more difficult: First, thin-gauge high-strength plates have high requirements on the performance of the rolling mill and the control accuracy of the plate crown during the rolling process; A twist occurs. Therefore, the final shape quality mainly depends on the straightening of the cold leveler. [0003] During the straightening process of the curved steel plate, the curvature of different positions of the steel plate tends to be similar t...

AI Technical Summary

Problems solved by technology

By adopting the method of biting into the steel plate first and then setting the roll gap, the problem of the head hitting the straightening roller during the biting process of the steel plate during large reduction straightening is avoided; by positioning the head and tail of the steel plate during the straightening process, It solves the problem that the steel plate cannot enter due to excessive head and tail warpage in the subsequent straightening process; and through the straightening process of multi-pass decreasing roll gap setting, the straightness of the steel plate is improved, and the steel plate’s Internal stress distribution is more uniform

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