Method for controlling shearing length of multi-length flying shear

Abstract

The invention discloses a method for controlling shearing length of a multi-length flying shear, which comprises the following steps: (1) after a rolled piece passes by a heating furnace delivery table, the weight Gn of the rolled piece is obtained; (2) a T400 controller records time Tw of the rolled piece passing through the head part and the tail part of the multi-length flying shear, and records time Tn of the whole rolled piece passing through the multi-length flying shear, so that the rolled piece length is computed through the formula: Ln=Tn*Lw / Tw; (3) after next rolled piece passes through the heating furnace delivery table, the weight Gm of the rolled piece is obtained, so that the length of the rolled piece is calculated through the formula: Lm=Gn*Ln / Gm; (4) the number of shearing times of the multi-length flying shear can be calculated through the formula: Lm tail=Lm-Sigma Lc, wherein when the Lm tail is zero or a negative value, x-1 is the number of shearing times; (5) the final specified length sheared by the multi-length flying shear can be calculated through the formula: Lz=Lm / x-1, and the rolled piece is sheared after the specified length is updated. In addition, the invention further discloses a device for controlling the shearing length of the multi-length flying shear. The method has the function of eliminating 'short tail' and avoiding steel heaping, the cold bed mounting fault is reduced, the production pace is guaranteed, and the potential safety hazard is reduced.

Description

technical field [0001] The invention relates to a method for controlling the shearing length of double-scale flying shears, more specifically, a method for controlling the shearing length of multiple-scale flying shears by using a T400 control board. Background technique [0002] In the bar production line, the double-length flying shear is the key equipment to improve the bar yield and the fixed-length yield, and it is also the key link for the rolled piece to be placed on the cooling bed after shearing. [0003] In the control system, it is often used to manually set the cutting length of each knife to be the fixed length. In the fixed length control mode, the operator sets the cutting length of each knife of the double ruler flying shear on the interface. In this case Under this condition, the operator can take into account the fixed errors and add empirical values ​​to the sizing to eliminate these fixed errors. [0004] However, in the actual production process, due t...

AI Technical Summary

Problems solved by technology

[0004] However, in the actual production process, due to the fluctuation of the length of the billet and the fixed length of each knife in the fixed-length control mode, the double-length flying shear often cuts short tails. The short tail stays in the lower steel guide groove, collides with the next bar, and piles up steel, causing the failure of the upper cooling bed, disrupting the production rhythm, and bringing danger to the operator

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