Comprehensive optimization setting method for front and back reference tension of disk shear of PL-TCM (pickling line tandem cold rolling mill)

Abstract

The invention provides a comprehensive optimization setting method for front and back reference tension of a disk shear of a PL-TCM, and belongs to the field of metal processing. The comprehensive optimization setting method comprises the steps of collecting shearing process parameters of the disk shear and major character parameters of a strip to be sheared; defining various indexes; setting the changed step size, the search frequency, the tension attenuation index, the steel grade influence coefficient and the front and back tension difference weighting coefficient of each parameter to obtain set values of the front and back tension; eliminating n groups of tension whose adjacent tension difference is lower than 0.5%; performing a shearing test on the spot; and sampling the sheared strip after sheared, picking out a test specimen with the optimal shearing quality to obtain the optimal front and back tension set values of the disk shear with a shear strength of sigma s in a steel grade process, and then setting the shearing tension of the steel grade with the strength of sigma s. according to the comprehensive optimization setting method, the influence of the matching of the steel grade, the strength and the front and back tension on the shearing quality is considered; the parameters such as the tension attenuation index, the steel grade influence coefficient, the front and back tension difference weighting coefficient and the like are led in; and a set of novel front and back tension setting method suitable for driving and driven disk shears simultaneously is provided.

Description

technical field [0001] The invention belongs to the field of metal processing, and in particular relates to a method for setting / controlling the optimal parameter of shearing tension of a disc shearing device. Background technique [0002] In the industrial production process of metal processing, there are various types of shearing machines that are often used. Flat blade shears, inclined blade shears, and disc shears are all commonly used shearing devices. [0003] Among them, flat blade shears are used for cutting billets, inclined blade shears are used for cutting plates, and disc shears are widely used for longitudinal shearing of steel plates or thin steel strips. [0004] Disc shearing machine is a shearing device with two disc-shaped blades, which can continuously shear moving steel plates or strips longitudinally. Disc shearing machines are usually installed on finishing lines for Cut the sides of the steel plate and strip longitudinally, or cut the steel plate and ...

AI Technical Summary

Problems solved by technology

[0008] In this way, the total tension (T 1 =Bhσ, where: T 1 - Front total tension, B-strip width, σ-reference tension) is greater than rear total tension (T 2 =(B-ΔB w -ΔB d )hσ, where: ΔB w - Shear amount on working side, ΔB d - drive side shear), causing a system tension difference

This systematic tension difference must be adjusted by disc shears and S rollers to achieve balance, resulting in an unstable shearing process

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