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Measuring method of rolling mill rigidity difference

A rolling mill stiffness and difference measurement technology, which is applied in the rolling mill stiffness difference measurement and on-line measurement of rolling mills, can solve problems such as errors and false alarms regardless of measurement, and achieve the effect of improving functional accuracy

Active Publication Date: 2022-04-22
武汉钢铁有限公司
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  • Application Information

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Problems solved by technology

In actual use, the measurement error is not considered, so there is a possibility of false positives

Method used

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  • Measuring method of rolling mill rigidity difference
  • Measuring method of rolling mill rigidity difference
  • Measuring method of rolling mill rigidity difference

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Embodiment Construction

[0020] Such as figure 1 The unit shown is installed under the chocks of the lower back-up rolls of the rolling mill. The pressure measuring head 4 is installed in the mounting frame 6, the pressure measuring head 4 is a cylinder, and the mounting frame 6 is an inner hollow cylinder such as figure 1 shown. An upper pressure equalizing plate 3 is arranged on the pressure measuring head 4, and a lower equalizing pressure plate 5 is arranged below the pressure measuring head. A concave arc-shaped block 2 is arranged on the upper pressure equalizing plate 3, and the effect of the convex arc-shaped block 1 is that after the current supporting roller deviates, after the offset force is canceled, the lower supporting roller can self-return. Such as figure 2 The direction indicated by the arrow is the rolling direction, and a piezoelectric induction sheet 7.1 is installed in the direction of the inlet side, and a pressure induction sheet 7.2 is also installed in the direction of th...

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Abstract

The invention discloses a method for measuring the stiffness difference of a rolling mill, which comprises: step 1, installing an installation device matched with a pressure measuring head; step 2, setting piezoelectric induction sheets on both sides of the pressure measuring head; Piezoelectric sensor pressure R 1 and the outlet piezoelectric sensor pressure R 2 The pressure difference R=k(R 1 -R 2 ), if the difference is greater than 0, the pressure measuring head is inclined to the entrance, otherwise it is inclined to the exit; step 4, the pressure measured by the pressure measuring head is U, the inclination angle is α=arctg R / U, and the actual rolling force is F =R / sinα, the measured rolling mill stiffness f=φ(F), if the pressure of the hydraulic cylinder of the rolling mill is G, the measured rolling mill stiffness g=φ(G), then the stiffness difference on the same side of the rolling mill is g‑f. Through the invention, the measurement data of the rolling mill of the pressure measuring head can be corrected to obtain the real measurement pressure, thereby obtaining the stiffness of the rolling mill close to the real one.

Description

technical field [0001] The invention relates to an on-line measurement method of a rolling mill, in particular to a method for measuring a stiffness difference of a rolling mill, and belongs to the technical field of detection of a hot rolling finishing mill. Background technique [0002] For rolling mills, especially hot rolling mills, the stiffness of the rolling mill is an important technical index to control the shape of the strip. Stiffness can not be completely consistent, so it is necessary to develop a stiffness index. If the rolling mill stiffness is within a certain range, it is considered that the rolling mill stiffness is qualified. Otherwise, it is necessary to stop the machine for stiffness adjustment, such as replacing bearings and adjusting shims. [0003] Stiffness is an absolute index. In practice, the stiffness difference is usually used as the judgment standard. If the stiffness difference is greater than the set value, it is judged that the rolling mil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B38/00B21B38/06
CPCB21B38/00B21B38/06
Inventor 邱碧涛袁金周坤陈维栋陈燕才赵雪松何可
Owner 武汉钢铁有限公司
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