High-energy electric pulse strip shape regulation and control method for high-hardness and high-brittleness cold-rolled strip

Abstract

The invention provides a high-energy electric pulse strip shape regulation and control method for a high-hardness and high-brittleness cold-rolled strip. The method comprises the following steps of (1), rapidly improving the plasticity, elongation or tensile stress transverse distribution state of the cold-rolled strip difficult to deform by utilizing the electric plastic effect of high-energy electric pulses, finely regulating the electric field state in the cold-rolled strip, reducing the rolling pressure, improving the transverse shape of a roll gap, and finely adjusting the internal residual stress and local deformation; and (2), based on a high-energy electric pulse strip shape control relation, adjusting the strip shape of the cold-rolled strip by utilizing the high-energy electric pulse plasticizing mechanism, meanwhile, adjusting the strip thickness and the surface quality, controlling the thermal convexity of an electric roller in a segmented mode so as to enable the roller gap to meet the fixed proportional convexity relation, reducing the rolling force, keeping good pocket lubricating conditions, and obtaining a good friction peak or friction coefficient meeting the surface quality requirement.

Description

technical field [0001] The invention belongs to the field of automatic measurement of rolling machinery and equipment, in particular to a high-energy electric pulse shape control method for high-hard and brittle cold-rolled strips. Background technique [0002] Although high-hard, brittle and difficult-to-deform materials are easy to form during the hot rolling process, the structure changes are obvious, the grain differences are large, and the surface quality is not ideal. However, it is extremely difficult to process this material in a cold state, and the toughness and plasticity are too poor, resulting in shape, performance It is not easy to control, which puts higher and more stringent technical requirements on the traditional room temperature forming process and continuous industrial production. The control methods of the shape and thickness of the traditional strip mill mainly include tilting, bending, traversing, crossing, original roll shape, segmental cooling, etc. ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to propose a current distribution on-line regulation method based on the existing equipment under the existing technical conditions, to improve the uniformity of the wide-band lateral current distribution of electroplastic rolling, and to use the high-energy electric pulse Plastic effect, on-line adjustment of the macroscopic deformation law and metal flow characteristics of hard-to-deform cold-rolled strips, change the local plasticity of metal strips, and finely control the local shape of the strip by finely adjusting the electroplastic effect of high-energy electric pulses, which can be used for traditional A new type of control means for plate shape (flatness) and plate thickness (generalized plate thickness including longitudinal and transverse thickness difference or cross-sectional shape) is added to the plate and strip rolling mill

Images