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A calibration method for pinch rolls of hot rolling coiler

A calibration method and technology of pinch rollers, applied in guiding/positioning/alignment devices, metal processing, metal processing equipment, etc., can solve problems such as inaccurate measurement, avoid serious accidents, avoid stacking steel, and ensure reliability Effect

Active Publication Date: 2015-11-25
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a calibration method for pinch rolls of hot rolling coilers, which solves the inaccuracy existing in the actual measurement of the zero roll gap of pinch rolls of hot rolling coilers The problem

Method used

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  • A calibration method for pinch rolls of hot rolling coiler

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Embodiment Construction

[0018] combine figure 1 As shown, a method for calibrating pinch rolls of a hot rolling coiler provided in an embodiment of the present invention includes the following steps:

[0019] Step 1: After the calibration starts, after a delay of 1s, the PLC control system adopts the position control mode, and sets the upper limit position of the upper pinch roller as pinch roller 1 as the target position of the roll gap A=514mm, and controls the upper clamp The feed roller opens to this upper limit position. The target position setting value A of the upper pinch roller is obtained through manual setting according to the stroke of the hydraulic cylinder of the upper pinch roller. Among them, the position control mode means that the PLC control system sends a pressing command to the pinch roller 1 and sets a certain roll gap target value, and the pinch roller 1 will always perform the pressing action until the position of the pinch roller 1 reaches the roll gap target value.

[002...

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PUM

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Abstract

The invention discloses a calibration method for pinch rolls of a hot rolling coiler. The method includes: firstly, a PLC (programmable logic controller) control system adopts a position control mode to open a first pinch roll to an upper limit position; secondly, the PLC control system adopts the position control mode to close the first pinch roll to a pre-contact position of the first pinch roll with a second pinch roll, and the first pinch roll is subjected to pressure zero; thirdly, the PLC control system adopts the position control mode to control the first pinch roll to continue closing, and when the first pinch roll contacts with the second pinch roll, the PLC control system changes to control the first pinch roll to continue closing by a pressure control mode; and fourthly, in the pressure control process, roll gap zero point detection is carried out.

Description

technical field [0001] The invention relates to the technical field of pinch rolls, in particular to a calibration method for pinch rolls of a hot rolling coiler. Background technique [0002] The coiler is a very important equipment in the hot rolling production line. It is used to coil the steel strip produced by the finishing mill. The coiled steel strip is coiled for the next step of packing and spraying. The pinch roll is a crucial part of the coiler, which plays a very important role in the strip coiling, strip shape and surface quality. In the current production, the pinch rollers of the coiler often have the problems of difficult calibration and inaccurate calibration. When the zero roll gap is actually measured on site, it often happens that the upper and lower rolls do not actually fit together, or the pressure is too high after the pinch rolls are closed. This situation will cause the pinch rollers to not be properly calibrated. After the finishing mill throws ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B39/16B21C47/34B21C51/00
Inventor 胡娜赵继武汪万根陈建宇刘顺东李越
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD