Strip steel scrap edge rag control method suitable for rewinding unit circle shear

Abstract

The invention provides a strip steel scrap edge rag control method suitable for a rewinding unit circle shear. The overlap amount S, the gap amount delta and the shear tension sigma of the circle shear are controlled to control the scrap edge rag of strip steel. The method is characterized in that the optimal overlap amount influence coefficient phi, the optimal gap amount influence coefficient theta and the optimal shear tension influence coefficient lambda of a group of strip steel are used to calculate the optimal overlap amount Sij, the optimal gap amount deltaij and the optimal shear tension sigmaij of the i-th kind of steel ball and the strip steel of the j-th thickness in the group of strip steel. The method takes into account the influence of the overlap amount, the gap amount and the shear tension of the circle shear on the scrap edge rag of the strip steel, and controls the scrap edge rag of the strip steel.

Description

technical field [0001] The invention relates to a strip trimming burr control method suitable for a disc shear of a recoiling unit. Background technique [0002] Such as figure 1 As shown in A and 1B, in the production process of the recoiling unit, strip 1 is trimmed by disc shears under a certain tension to remove the cracks at the edge of the strip produced during the rolling process and meet the product requirements. width. The disc shears of the recoiling unit are composed of two circular upper blades 2 and lower blades 3 at the cantilever end that are dislocated up and down. During edge trimming, the disc scissors move in a circular motion to form a pair of endless cutting edges. Under the action of the shear tension σ, the strip steel 1 cuts edges between the upper blade 2 and the lower blade 3 of the disc shears with an overlapping amount S and a gap amount Δ, and the blades apply a certain shear force to the strip steel 1. The shear force causes elastic-plastic ...

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Problems solved by technology

[0005] Existing patent applications CN201110164846.5 and CN201210021953.7 proposed an optimization scheme for the above-mentioned parameter setting of the disc shears, but they only separately optimized the overlapping amount, the clearance amount and the shearing tension of the disc shears. Accounts for the interplay between the amount of overlap, the amount of gap, and the shear tension

However, in the trimming process of the disc shears of the recoiling unit, the overlapping amount of the disc shears, the setting of the gap and the setting of the shearing tension have mutual coupling effects on the trimming burr height of the strip after shearing. Changes in the overlap and gap settings will result in changes in the optimal shear tension, and changes in the shear tension will also result in changes in the optimal overlap and gap

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