Scale-removal guide and guard device used in finish milling machine frame

A technology of a guide device and a finishing mill, which is applied in the field of guide devices, can solve the problems affecting the quality of the roll surface, affecting the quality of the strip steel surface, increasing the water cutting plate, etc., so as to improve the quality of the roll surface and the surface quality of the strip steel, and improve the Descaling utilization rate, effect of avoiding shock and vibration

Active Publication Date: 2015-12-30
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • 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 CN202910091U discloses "High-pressure water descaling device between hot-rolling 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 header moves together with the frame, making 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 cutting plate Wear and affect the water cutting effect of the work roll cooling water, and once the scrap steel piled up in the machine causes the deformation and damage of the water cutting body, it is necessary to replace the descaling device and the water cutting device at the same time, and the processing time is very long
[0008] Chinese patent CN200957428 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 when it is closed affects 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 rack, resulting in uneven surface of the lower guide. , thereby affecting the strip surface quality
[0009] Chinese patent CN200984589 discloses "Rolling Mill High Pressure Water Descaling Header Device", the descaling header is fixed on the support roll guard plate, the descaling and guide can be drawn out together with the support roll, the structure is simple, and the replacement is convenient, but the scheme The header follows the movement of the back-up rolls. For the purpose of loading the rolls, there must be a certain gap between the back-up roll guards and the work roll guards, which results in poor water cutting effect, which requires high-quality rolling for the production of strip steel. , does not apply at all
[0010] Chinese patent CN203076346U 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 a reinforcing rod. However, there is no mention of how to independently fix the descaling header on the archway and effectively avoid steel scrap

Method used

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  • Scale-removal guide and guard device used in finish milling machine frame
  • Scale-removal guide and guard device used in finish milling machine frame
  • Scale-removal guide and guard device used in finish milling machine frame

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 : See figure 1 , A descaling guide and guard device between finishing rolling stands, the guide and guard includes an outlet upper guide 4, an outlet lower guide 1, an upper descaling header 6, a lower descaling header 3, the outlet upper guide The guard 4, the upper descaling header 6, the outlet lower guide guard 1, and the lower descaling header 3 are arranged symmetrically on the upper and lower sides of the archway. The upper descaling header 6 is arranged outside the outlet upper guide guard 4, The lower descaling header 3 is arranged on the outer side of the lower exit guide guard 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 and guard device also includes an outlet upper guide and guard drive connecting rod device 5 and an outlet upper guide guard drive cylinder 7. The outlet upper guide guard 4 is connected through the outlet upper guide guard drive co...

Embodiment 2

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

Embodiment 3

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

[0032] As an improvement of the present invention, the guard and guard plate 15 and the frame plate 17 are arranged in an opening. The opening between the guide guard plate 15 and the frame 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 guard is at the roller changing position. The upper guide guard frame body plate 17 and the header 6 There is a 30mm gap between them. The rest of the structure and advantages are exactly the same as the first embodiment.

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Abstract

The invention relates to a scale-removal guide and guard device used in a finish milling machine frame. The scale-removal guide and guard device is characterized by comprising an outlet upper guide and guard, an outlet lower guide and guard, an upper scale-removal header pipe and a lower scale-removal header pipe, the outlet upper guide and guard, the upper scale-removal header pipe, the outlet lower guide and guard and the lower scale-removal header pipe are symmetrically arranged on the upper side and the lower side of a housing, the upper scale-removal header pipe is arranged on the outer side of the outlet upper guide and guard, the lower scale-removal header pipe is arranged on the outer side of the outlet lower guide and guard, the upper scale-removal header pipe is fixed to the housing, and the lower scale-removal header pipe is fixed to a support outside the housing.

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

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B21B39/16B21B45/08
Inventor石朗国冯春荣
OwnerSHANGHAI MEISHAN IRON & STEEL CO LTD