Machine unit process for stretch bending, straightening and rewinding

Abstract

The invention provides a unit process used for finishing, tension-bending, straightening, and recoiling the metallurgical cold-rolling strips. The process is characterized in that the process comprises at least the steps as follows: roll-up, uncoiling, head cutting, welding, tension-bending and straightening, tensioning piston, rectification, trimming, separating, coiling and coil removing. When the unit produces normally, a coiler provides initial tension for an outlet tension roller; when the production line is shut down for coil separating, the coiler is shut down, the tensioning piston provides the initial tension equivalent to the coiling tension during the normal production for the outlet tension roller and a tension-bending, and straightening machine continues to straighten the strips; the straightened strips are stored in the tensioning piston; when the coiler removes the coils and re-produces the next finished coils, the straightened strips stored in the piston are coiled, the lifting roller unit of the movable sleeve falls to a lower limit position, the coiler loads the tension and shifts the initial tension of the tension-bending and straightening machine from the tensioning piston to the coiler at the same time, and then the whole unit produces at an accelerated speed. The process can overcome the defects generated on the disc shear by the strips when the tension is shifted between the coiler and the tensioning piston owning to the shutdown of the coil separating.

Description

technical field [0001] The invention belongs to the field of finishing equipment for cold-rolled steel strips in the metallurgical industry, in particular to the processing of stretching, bending, straightening, edge trimming and coiling processes for strips, and more precisely, it is a process of stretching, bending, straightening and recoiling unit. Background technique [0002] When high-quality cold-rolled sheets such as automobile sheets and home appliance sheets become finished products, they need to go through a finishing process, including shape correction, edge trimming, and coiling. The more serious defect of the existing cold-rolled plates when they are processed by the finishing process is that when the coils are shut down, there is a section of unstraightened strip steel at the head of each finished coil; The strip backs up, creating shear defects. Contents of the invention [0003] The purpose of the present invention is to provide a stretch bending, straigh...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a stretch bending straightening and recoiling unit process in order to solve the problem that the strip produces defects on the disc shears when the tension is switched between the coiler and the tension looper due to the shutdown of the sub-coil

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