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Method for levelling checkered plate through hot-rolling levelling unit

A patterned plate and tempering machine technology, applied in metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of affecting enterprise benefits, the quality of plate shape cannot reach users, and there are many quality objections, and achieve good results. The effect of reducing uneven wear and accelerating the process smoothly

Active Publication Date: 2017-12-01
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the needs of downstream customers, hot-rolled checkered plate products are constantly being developed, and the thickness of the checkered plate in the hot-rolled coil production line is gradually reduced, which makes the shape of the checkered plate more and more prominent, and there are many quality disputes, which affect the company's profitability.
In the existing technology, the hot-rolling and skin-passing unit only processes the corrugated checkered plate through the straightening mode, but the quality of the plate shape still cannot meet the requirements of the user

Method used

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  • Method for levelling checkered plate through hot-rolling levelling unit
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  • Method for levelling checkered plate through hot-rolling levelling unit

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specific Embodiment approach

[0035] (1) The HGC hydraulic cylinder of the tempering machine is the core device for leveling the checkered plate, so it is very important to control the technical indicators of the HGC hydraulic cylinder body. The surface roughness of the inner diameter of the cylinder and the outer diameter of the piston needs to reach Ra0.4μm. The cylinder body and the piston need to be plated with hard chrome. The thickness of the coating is 0.08-0.1mm. ~0.05mm, after grinding, the surface roughness of the inner surface of the cylinder and the outer surface of the piston can reach the mirror precision of Ra0.2μm or more, this precision can greatly reduce the friction coefficient between the guide belt and the seal and the cylinder, prolong the service life of the seal, reduce Leakage, reduce start-up pressure, improve frequency response time, reduce same-plate difference and different-plate difference, and improve checker plate leveling accuracy.

[0036] (2) The rolling line adjustment d...

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Abstract

The invention relates to a method for levelling a checkered plate through a hot-rolling levelling unit, and belongs to the technical field of hot-rolling levelling units. According to the technical scheme of the method for levelling the checkered plate through the hot-rolling levelling unit, the mechanical aspect relates to model selection of a leveling machine HGC hydraulic cylinder and model selection of rolling line adjusting device; the electrical aspect comprises optimization of transmission control system speed slope parameters, optimization of a HGC screwdown control system PI adjuster and a proportionality coefficient and filtering treatment in pressure sensor feedback value; and an original single sine negative convexity or multi-power negative convexity roll shape of a working roll is changed, and an experience curve is used. The method for levelling the checkered plate through the hot-rolling levelling unit has the beneficial effects that the problem of levelling the checkered plate through the hot-rolling levelling unit is solved, meanwhile, the production efficiency is also improved obviously, the levelled checkered plate product quality accords with a technical index requirement, and good economic benefits are created for an enterprise.

Description

technical field [0001] The invention relates to a method for smoothing a checkered plate by a hot-rolling leveling unit, which belongs to the technical field of hot-rolling leveling units. Background technique [0002] At present, the thin-gauge checkered plates that come off the production line of hot-rolled coils have more serious plate shape problems, and the unevenness of many checkered plates with a thickness of 3mm has reached 14mm / 2m. Due to the needs of downstream customers, hot-rolled checkered plate products are constantly being developed, and the thickness of the checkered plate in the hot-rolled coil production line is gradually reduced, which makes the shape of the checkered plate more and more prominent, and there are many quality disputes, which affect the company's benefits. In the prior art, the hot-rolling and skin-passing unit only processes the wave-shaped checkered plate through the straightening mode, but the quality of the plate shape still fails to me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B15/00
CPCB21B15/00B21B2015/0071
Inventor 王超赵子刚白海涛庄倩男曹继宏闫凤龙周景鑫
Owner HEBEI IRON AND STEEL
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