Dynamic setting method for rolling roller gap through hot rough rolling

A setting method and roll gap technology, applied in the direction of rolling force/roll gap control, etc., can solve the problems of low speed, low precision, and failure of hydraulic cylinder median wear, so as to reduce cylinder wear and improve rolling. Efficiency and the effect of ensuring adjustment accuracy

Active Publication Date: 2014-08-27
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the problem of failure of the middle position of the hydraulic cylinder in the existing traditional method of adjusting the roll gap of the rolling mill, and the problems of low precision and low speed in the existing method of separately adjusting the roll gap of the rolling mill by electric and hydraulic pressure

Method used

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  • Dynamic setting method for rolling roller gap through hot rough rolling
  • Dynamic setting method for rolling roller gap through hot rough rolling
  • Dynamic setting method for rolling roller gap through hot rough rolling

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Embodiment

[0022] The method for dynamically setting the hot rough rolling roll gap in this embodiment is described by taking the existing rough rolling reversing rolling mill as an example. The electric and hydraulic pressing structure of the rolling mill is as follows figure 1 As shown, its Mechanical stroke of hydraulic cylinder Lmax is 60mm, hydraulic Cylinder soft limit value R is set to 2mm. The setting method of this embodiment assumes that there are 20 steel coils in actual operation, the ID numbers of the steel coils are 20072923010-20072923019, the steel types are all SPHC, the original thickness of the slab is 170mm, and the thickness of the rough rolling intermediate billet is required to be 38mm. Five passes (that is, the total number of rolling passes N=5) are rolled, and the preset total roll gap setting values ​​Lz1, Lz2, Lz3, Lz4 and Lz5 of the five passes are 100mm, 84mm, 68mm, 52mm and 38mm respectively. The flow of the setting method in this embodiment is as f...

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Abstract

The invention relates to a method for dynamically setting a hot rough rolling roll gap, and belongs to the technical field of metal rolling control. The method sequentially determines the working stroke of the hydraulic cylinder and the set value range of the hydraulic pressure roll gap; calculates the set value of the hydraulic pressure roll gap for each pass of the steel coil and sets the maximum working stroke of the hydraulic cylinder as the first pass hydraulic pressure of the steel coil. The set value of the lower roll gap; calculate the set value of the roll gap under the electric pressure of each pass of the steel coil; calculate the hydraulic pressure roll gap of each pass of the next steel coil according to the actual measurement of the actual value of the hydraulic pressure of the roll gap of each pass of the steel coil Set value deviation, and calculate the set value of the hydraulically pressed roll gap for each pass of the next steel coil; judge whether the set value of the hydraulically pressed roll gap for the last pass of the next steel coil is less than the minimum value of the hydraulically pressed roll gap, according to Judgment result Repeat the above process until the last piece of steel coil. This method can reduce hydraulic cylinder wear and roll gap setting time and ensure the accuracy of roll gap adjustment in the whole process.

Description

technical field [0001] The invention relates to a method for setting rolling roll gap during hot rough rolling, which belongs to the technical field of metal rolling control. Background technique [0002] The common method of adjusting the roll gap of the rolling mill during rough rolling in the existing hot rolling mill is to use electric and hydraulic pressure to adjust the roll gap of each pass during the whole (full pass) rolling, and the roll gap adjustment is mainly by electric Press down, hydraulic press down for fine adjustment of roll gap. In this way, the total roll gap value of each pass is composed of the electric roll gap value and the hydraulic pressure roll gap value. [0003] The specific method process of the existing traditional adjustment of the roll gap of the rolling mill is: at first a fixed value of the hydraulically pressed roll gap is given (i.e. Hydraulic pressing roll gap setting value or Hydraulic cylinder extension position setting value ), a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/62
Inventor 谢向群张奇迅
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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