A descaling guide device between finishing rolling stands

The technology of a guide device and finishing mill, which is applied in the field of guide devices, can solve the problems affecting the quality of the roll surface, the surface quality of the strip steel, the life of the guide guard and the water cutting effect, etc., so as to improve the quality of the roll surface and the strip steel Effect of surface quality, improvement of descaling utilization rate, improvement of water cutting effect

Active Publication Date: 2017-07-14
SHANGHAI MEISHAN IRON & STEEL CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But if it is fixed on the archway, the guide needs to be lengthened to prevent the strip steel from drilling into the gap between the guide and the header, but this way the guide interferes with the header when the roll needs to be driven out; and if in order to avoid If the guide position raises the descaling header too high, it will affect the descaling impact. Therefore, for this swinging guide structure, the descaling header is currently arranged on the guide frame inside the archway, but this is There are several problems: (1) The descaling header is very close to the roll gap. When water is sprayed, the scale will be driven into the roll gap, and the roll surface will be greatly scoured, which will affect the quality of the roll surface and then affect the surface quality of the strip. ; (2) The guard plate of the lower guide guard is severely washed out, and the guard plate is washed out of a deep pit in less than a week. It must be replaced in two weeks, which increases the production cost; (3) When the strip is tilted, it is easy to push against the water spray hole on the water cutter body, and because it is close to the roll gap, the strip between the roll gap and the water spray hole is short. The deformation ability is poor, so the strip is easy to top the scrap steel at the water spray hole; (4) Because the lower descaling header is on the outside, it opens early or closes later, including the nozzles that cannot be covered by the strip during normal rolling. The water directly hits the upper guide body. In order to prevent the upper guide body from being washed seriously, it is necessary to separately connect the guard plate and the water tank outside the guide body; (5) Due to the unavoidable on-site production, the rear frame is deviated due to strip steel and other reasons When stacking of scrap steel occurs, the piston rod of the oil cylinder often bends or even falls off, and the guide body is often squeezed, resulting in deformation that cannot cut the water or even damages the movement pair, so the descaling header and water cutting guide body must be replaced, and the troubleshooting time is very long (6) Since the descaling header is fixed on the body of the guide and water cutting plate, its opening and closing impact will cause the impact vibration of the roller and the guide plate, and affect the water cutting effect of the water cutting plate, and affect the wear of the roll and water cutting; (7) Due to the long distance between the injection positions of the upper and lower headers, when rolling thin-gauge strip steel, the strip steel will be blown upward by the high-pressure descaling water when it reaches the nozzle of the lower header, which will affect the biting of the rear frame and scrap steel; In order to prevent this kind of scrap steel, when rolling thin-gauge strip steel, the descaling between the racks is often closed, but this leads to the inability to remove the scale of the strip steel. Slipping and vibration problems
[0005] How to use the swing-type guide at the exit of the front rack of the finishing mill to take advantage of the advantages of small motion range and small resistance of the kinematic pair, and to independently fix the descaling header on the archway to avoid the scrap steel and steel produced by the above-mentioned various reasons There is no suitable solution for the abnormal impact on the roll and the water cutting plate, and to avoid the problems of iron sheet defects and slipping vibration caused by the inability to put into use due to descaling
[0006] Chinese patent CN 202910091U discloses "High-pressure water descaling device between hot-rolling and finishing mill stands", which realizes descaling by installing upper descaling header and lower descaling header on the upper cutting water plate frame and the guide frame respectively. The scale header moves together with the frame, which makes it possible to install the descaling device between the mill stands, but because it is fixed on the water cutting body, the impact on the roll surface and the water cutting plate when it is opened and closed will affect the quality of the roll surface and increase the water shear. The plate is worn and affects the water cutting effect of the cooling water of the work rolls, and once the scrap steel stacks in the machine and the water cutting body is deformed and damaged, the descaling device and the water cutting device must be replaced at the same time, and the processing time is very long
[0008] Chinese patent CN 200957428 discloses "Rolling Mill Guide Device". The descaling header is fixed on the guide plate, and the guide moves up and down through the slideway. Its outstanding advantage is that it is easy to replace. The impact on the guide body and work rolls during opening and closing will affect the life of the guide and the water cutting effect. On the other hand, because it cannot achieve hedging, the descaling water will seriously damage the equipment in the frame, causing the surface of the lower guide to be uneven. Unevenness, which in turn affects the surface quality of the strip
[0009] Chinese patent CN 200984589 discloses "High Pressure Water Descaling Header Device for Rolling Mill". The descaling header is fixed on the back-up roll guard, and the descaling and guide can be drawn out together with the back-up roll. The structure is simple and easy to replace. The scheme header follows the movement of the back-up rolls. For the purpose of loading rolls, there must be a certain gap between the back-up roll guards and the work roll guards, which leads to poor water cutting effect, which is very important for rolling high-quality strip steel. production, does not apply at all
[0010] Chinese patent CN 203076346U discloses "A Rolling Mill High-Pressure Descaling Header Device". This solution mainly solves the problem of cracking of the header's own header weld by moving the cap weld inward and adding reinforcement rods. , but there is no mention of how to independently fix the descaling header on the archway and effectively avoid steel scrap

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A descaling guide device between finishing rolling stands
  • A descaling guide device between finishing rolling stands
  • A descaling guide device between finishing rolling stands

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: see figure 1 , a descaling guide device between finishing rolling stands, the guide device includes an upper outlet guide 4, an outlet lower guide 1, an upper descaling header 6, and a lower descaling header 3, and the upper outlet guide The guard 4, the upper descaling header 6, the outlet lower guide 1, and the lower descaling header 3 are symmetrically arranged on the upper and lower sides of the archway, and the upper descaling header 6 is arranged outside the outlet upper guide 4, The lower descaling header 3 is arranged on the outside of the outlet lower guide 1, the upper descaling header 6 is fixed on the archway 10, and the lower descaling header is fixed on the support 9 outside the archway. The guide device also includes an upper export guide drive linkage device 5 and an upper export guide drive cylinder 7, and the upper export guide 4 is connected by the upper export guide drive linkage device 5 and the upper export guide drive cylinder 7. On...

Embodiment 2

[0030] Example 2: see figure 1 , figure 2 , as an improvement of the present invention, the lower surface of the guide device is also provided with a water cutting plate 12, a guide support plate 13, a guide guard guide plate 15, a frame plate 17, and the guide support plate 13 is used for fixing The water cutting board supports the upper guide at the exit, and the frame body plate 17 is arranged above the guide and guard guide plate as the main body of the upper guide at the exit. The upper descaling header 6 is provided with a descaling nozzle 19 and a header protection guide plate 18 . The guard guide plates 15, the nozzles 19 on the descaling header, and the header guard guide plates 18 are arranged alternately, and the number of guard guide plates is determined according to the strip width and support strength. The rest of the structures and advantages are exactly the same as in Embodiment 1.

Embodiment 3

[0031] Embodiment 3: see figure 1 , figure 2 , as an improvement of the present invention, the number of the guide and guard guide plates is at least two, and the guide and guard guide plates are connected by reinforcing ribs to further improve the connection strength. The rest of the structures and advantages are exactly the same as in Embodiment 1.

[0032] As an improvement of the present invention, the guard guide plate 15 and the frame body plate 17 are arranged with openings. The opening between the guide and guard guide plate 15 and the frame body plate 17 is set to ensure that there is a gap of more than 20mm between the upper surface of the guard guide plate 15 and the header 6 when the upper guide is in the roll changing position, and the upper guide guard frame body plate 17 and the header 6 There is a 30mm gap between them. The rest of the structures and advantages are exactly the same as in Embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a descaling guide device between finishing rolling stands, characterized in that the guide device includes an upper outlet guide, an outlet lower guide, an upper descaling header, a lower descaling header, and the outlet The upper guide, the upper descaling header, the lower outlet guide, and the lower descaling header are symmetrically arranged on the upper and lower sides of the archway, the upper descaling header is arranged outside the upper guide of the outlet, and the lower descaling The scale header is arranged on the outside of the lower guide at the outlet, the upper descale header is fixed on the arch, and the lower descale header is fixed on the support outside the arch.

Description

technical field [0001] The invention relates to a guide device, in particular to a descaling guide device between finishing rolling stands. Background technique [0002] The descaling between the finishing stands is arranged in the exit guide area of ​​the front stand of the finishing mill. It is a device installed between the front stands according to the hot rolling production experience to remove the tertiary oxide scale formed on the surface of the strip. [0003] At present, there are two structures of guide guards at the exit of the finishing mill, and the descaling device between stands adopts different arrangements according to the structure of the guide guards. An installation method of the exit guide is a slide rail type, and the upper and lower exit guides slide in and out along the slide rail on the lifting beam to realize the switching of the working position or the roll changing position. This arrangement of guides and guards can achieve a relatively fixed ver...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): B21B39/16B21B45/08
Inventor石朗国冯春荣
OwnerSHANGHAI MEISHAN IRON & STEEL CO LTD