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Slab thickness control device and method

A control device and plate thickness technology, which is applied in the direction of rolling mill control device, metal rolling, manufacturing tools, etc., can solve the problems of plate thickness quality deterioration and inability to meet hardness requirements, etc.

Inactive Publication Date: 2011-06-01
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the past, when the control to make the hardness constant was selected, the quality deteriorated from the viewpoint of plate thickness.
In most cases, the quality from the point of view of plate thickness has to be given priority. In fact, the requirements for hardness can no longer be met.

Method used

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  • Slab thickness control device and method
  • Slab thickness control device and method
  • Slab thickness control device and method

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Embodiment Construction

[0014] Hereinafter, specific modes for implementing the present invention will be described with reference to the accompanying drawings. exist figure 1 Among them, the material to be rolled 13 is rolled by a rolling mill 1 composed of work rolls (upper and lower) 14 , intermediate rolls (upper and lower) 15 , and backup rolls (upper and lower) 16 . In the rolling state, the reduction amount P is controlled by the reduction control device 2 so that the entry-side thickness H becomes the rolled exit-side thickness h. In addition, the rolling length detector 5 on the exit side and the rolling length detector 6 on the entry side provided in the rolling mill 1 can measure the entry length of the strip in a certain period of time on the entry side and exit side of the rolling mill, thereby calculating the length of the strip to be rolled. elongation of the material.

[0015] The output side plate thickness h is measured by the output side plate thickness gauge 3 as the output side...

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Abstract

The present invention provides plate thickness control (plate thickness controller) capable of maintaining the hardness depending on the plate thickness and the reduction degree within required quality range. While the reduction degree of the product is controlled within the required range, the plate thickness is also controlled. Based on the required reduction degree of the product, the entranceside plate thickness is limited based on the entrance side plate thickness measuring result. Through feedback control, the exit side plate thickness target value is altered based on the entrance sideplate thickness measuring result, and the reduction degree is limited while performing feedback control.

Description

technical field [0001] The invention relates to a plate thickness control device and a plate thickness control method. Background technique [0002] Generally, in rolling control, control is performed so that the plate|board thickness after rolling becomes a target plate thickness. For this purpose, for example, a plate thickness gauge is arranged on the output side of the rolling mill, the deviation between the output of the output side plate thickness gauge and the target plate thickness is obtained, and the interval between the rolls of the rolling mill is controlled so that the deviation is close to zero. [0003] There is a need to keep the thickness of the rolled sheet constant in this way, and there is also a need to keep the hardness of the rolled material constant after rolling. It is known that since the hardness of the rolled material is determined by the elongation of the rolled material, the elongation is obtained from the length of the rolled material before r...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/18B21B37/16
Inventor 服部哲福地裕
Owner HITACHI LTD