阅读说明：本技术 一种防带钢头部飞飘的热轧控制方法 (A kind of anti-strip steel head flies the controlling hot rolling method floatd ) 是由 崔二宝 霍光帆 刘志 王占东 刘丰 辛艳辉 王伦 张月林 于 2019-07-23 设计创作，主要内容包括：本发明公开了一种防带钢头部飞飘的热轧控制方法,包括控制上工作辊扁头与上扁头套的总间隙小于下工作辊扁头与下扁头套的总间隙,避免带钢头部向上弯曲、甚至飞飘,导致下游机架或卷取机无法正常咬入,造成轧废或头部折叠的情况。(Fly the controlling hot rolling method floatd the invention discloses a kind of anti-strip steel head, it is less than the total backlash of bottom working roll homalocephalus and lower flat head sleeve including the total backlash of control top working roll homalocephalus and upper flat head sleeve, it avoids strip steel head from being bent upwards, even fly to float, cause downstream rack or coiling machine not to bite normally, causes to roll the case where useless or head folds.)

1. a kind of anti-strip steel head flies the controlling hot rolling method floatd characterized by comprising

Control the total backlash that top working roll homalocephalus is less than bottom working roll homalocephalus and lower flat head sleeve with the total backlash of upper flat head sleeve.

2. anti-strip steel head as described in claim 1 flies the controlling hot rolling method floatd, which is characterized in that further include:

The relative elevation for adjusting inlet guide is 5-15mm smaller than the level height of bottom working roll.

3. anti-strip steel head as described in claim 1 flies the controlling hot rolling method floatd, which is characterized in that further include:

The relative elevation for adjusting outlet guide is 5-20mm smaller than standard roll line absolute altitude.

4. anti-strip steel head as described in claim 1 flies the controlling hot rolling method floatd, which is characterized in that further include:

The diameter for adjusting the working roll of rack F4-F6, keeps the diameter of the top working roll of same rack bigger than the diameter of bottom working roll 0.2~0.5mm；

The diameter of the working roll of rack F1-F6 is adjusted successively to successively decrease from F1 to F6, and when adjacent rack has same material, The diameter difference of the working roll of the adjacent rack is less than 30mm.

5. anti-strip steel head as described in claim 1 flies the controlling hot rolling method floatd, which is characterized in that further include:

The cooling water inflow that rear frame F4-F6 working roll crosses steel gap is improved to 70%-90%.

6. anti-strip steel head as described in claim 1 flies the controlling hot rolling method floatd, which is characterized in that further include:

When middle wave occurs in strip, the roll shifting value of rear frame F4-F6 is made to reduce 10-30mm, makes that rear frame F4-F6's is curved Roller power reduces 200-400KN.

7. anti-strip steel head as described in claim 1 flies the controlling hot rolling method floatd, which is characterized in that further include:

The quantity of loop transition plates is increased to 7 by 5.

Technical field

The present invention relates to a kind of controlling hot rolling methods that hot rolling technique field more particularly to anti-strip steel head fly to float.

Background technique

Temperature drop when ultra-thin gauge rolling in finishing mill is very fast, in order to guarantee head end rolling temperature, it is ensured that properties of product are full Sufficient technique is required it is necessary to have higher threading speed, generally higher than 10m/s, under too fast threading speed, when the threading of head Plate form control difficulty is significantly increased.In actual production, it often will appear the outlet rear frame F5 or F6 strip steel head and fly feelings of floaing Condition causes downstream rack or coiling machine not to bite normally, causes to roll the technical issues of useless or head folds.

Summary of the invention

The embodiment of the present application flies the controlling hot rolling method floatd by providing a kind of anti-strip steel head, solves in the prior art Cause downstream rack or coiling machine not to bite normally since strip steel head flies to float, the technology for rolling the folding of useless or head is caused to ask Topic.

A kind of anti-strip steel head flies the controlling hot rolling method floatd, comprising: control top working roll homalocephalus is total with upper flat head sleeve Gap is less than the total backlash of bottom working roll homalocephalus and lower flat head sleeve.

In one embodiment, the controlling hot rolling method further includes adjustment inlet guide relative elevation than bottom working roll water The flat small 5-15mm of height.

In one embodiment, the controlling hot rolling method further includes adjustment outlet guide relative elevation than standard roll line The small 5-20mm of absolute altitude.

In one embodiment, the controlling hot rolling method further includes the diameter for adjusting the working roll of rack F4-F6, is made same The diameter of the top working roll of one rack is 0.2~0.5mm bigger than the diameter of bottom working roll；

The diameter for adjusting the working roll of rack F1-F6 is successively to successively decrease from F1 to F6, and work as adjacent rack with identical material When matter, the diameter difference of the working roll of adjacent rack is less than 30mm.

In one embodiment, the controlling hot rolling method further includes that rear frame F4-F6 working roll is crossed steel gap Cooling water inflow is improved to 70%-90%.

In one embodiment, the controlling hot rolling method further includes making rear frame F4- when middle wave occurs in strip The roll shifting value of F6 reduces 10-30mm, and the bending roller force of rear frame F4-F6 is made to reduce 200-400KN.

In one embodiment, the controlling hot rolling method further includes that the quantity of loop transition plates is increased to 7 by 5 Root.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

The total backlash that top working roll homalocephalus is less than bottom working roll homalocephalus and lower flat head sleeve with the total backlash of upper flat head sleeve is controlled, The dynamic velocity drop of top working roll is set to be less than the dynamic velocity drop of bottom working roll, and prompt drop recovery time is shorter, i.e. the speed of top working roll Degree is greater than the speed of bottom working roll, and the belt steel surface elongation percentage of the big working roll side of speed is high, so when occur strip steel head to When upper bending, the extension of lower surface is extended greater than by speed official post strip upper surface, thus avoid strip steel head continue to Upper bending even flies to float, and downstream rack or coiling machine is caused not to bite normally, causes to roll the case where useless or head folds.

Specific embodiment

The embodiment of the present application flies the controlling hot rolling method floatd by providing a kind of anti-strip steel head, solves in the prior art Cause downstream rack or coiling machine not to bite normally since strip steel head flies to float, the technology for rolling the folding of useless or head is caused to ask Topic.

The technical solution of the embodiment of the present application is in order to solve the above technical problems, general thought is as follows:

A kind of anti-strip steel head flies the controlling hot rolling method floatd, comprising: control top working roll homalocephalus is total with upper flat head sleeve Gap is less than the total backlash of bottom working roll homalocephalus and lower flat head sleeve.

In order to better understand the above technical scheme, being carried out below by specific embodiment to above-mentioned technical proposal detailed Thin explanation.