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Thickness Control Technology of Hot Strip Head and Tail in Coil Stove Mill

A hot-rolled strip thickness control technology, applied in the direction of rolling mill control device, temperature control, rolling force/roll gap control, etc., can solve the problems affecting the yield rate, etc., to alleviate the temperature difference between the head and the tail, improve the effect, The effect of improved resistance to deformation

Active Publication Date: 2018-01-09
浦项(辽宁)汽车配件制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the thickness of the head and tail exceeds the upper limit of the tolerance, it needs to be cut off, which will affect the actual yield

Method used

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Effect test

Embodiment Construction

[0012] Specific embodiments of the present invention are described in detail below.

[0013] A process for controlling the thickness of the head and tail of hot-rolled strip steel in a coil furnace rolling mill, comprising the following steps: the strip steel after the rough rolling is sent into the finish rolling mill, and the strip steel needs to pass through the finish rolling unit N reciprocating calendering and rolling according to the process requirements It can be completed afterwards. In the rolling process, the end where the strip enters the rolling mill first is the head, and the end that enters later is the tail. During rolling, a strong pressure zone is set at the head and tail of the strip, and the length of the strong pressure zone is set as 0~30m, the actual roll gap is set to S~S-2.5mm, when the strip steel is in the last rolling process, the strong reduction of the head is appropriately reduced, and when the tail is rolling, when the length of the tail is 10~18...

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Abstract

The invention discloses a process for controlling the thickness of the head and tail of the strip steel to avoid overpressure in the strong pressure zone at the head and tail and protect the rolls from being damaged. It includes the following steps. , the end that enters later is the tail, and a strong pressure zone is set at the head and tail of the strip during rolling. During one rolling process, the strong reduction of the head is reduced. When the tail is rolling, when the length of the tail is 10~18m, the actual roll gap is gradually adjusted to S+0.5mm~S+1.5mm, and S is the target. Roll gap, the target roll gap refers to the roll gap between the upper and lower work rolls of the rolling mill set according to the calculation instruction. The invention has the advantages that: the head and tail of the strip are strongly pressed down, which not only reduces the excess thickness of the head and tail of the strip, improves the yield, but also avoids roll damage accidents caused by roll bite.

Description

technical field [0001] The invention relates to a technology for controlling the thickness of the head and tail of a hot-rolled steel strip in a coil furnace rolling mill. Background technique [0002] The single-stand coil furnace rolling mill is to install the coil furnace with both coiling and heating functions on both sides of the entrance and exit of the finishing mill to realize the reciprocating rolling of the strip. The main function of the coil furnace is to ensure the temperature of the strip steel during the rolling process. During the reciprocating multi-pass rolling process of the strip steel, due to multiple strips, the contact time between the head and tail of the strip steel and the outside is long and the heat loss is large. In addition, due to the direct contact between the head and tail of the strip and the coil drum in the coil furnace, a certain amount of heat loss will also be caused. These heat losses will aggravate the temperature difference between t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/16B21B37/58B21B37/74
Inventor 韦培友钱智君李朝忠陈胜春
Owner 浦项(辽宁)汽车配件制造有限公司
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