A method for automatically washing the frame during roller changing in finishing rolling

Abstract

The invention discloses a method for automatically flushing a frame during roller changing in finishing rolling. When the roller is pulled out during the roller changing process, the roller cooling water nozzle is turned on to start flushing the frame; when the roller changing trolley travels a distance of X, the guide plate at the entrance of the finishing rolling frame is automatically driven in, and maintained for 3-8 seconds after being in place; then the guide plate is automatically opened, and the guide plate opening size is Y; after being maintained for 3-8 seconds, the guide plate is continuously opened until the guide plate opening size is Y+Z and stops; when the roller changing trolley travels to the E6 roller changing position, the guide plate is automatically driven out, and after the guide plate is driven out in place, the roller cooling water nozzle is turned off to complete the entire flushing process. Based on the roller changing process, the invention automatically realizes the guide plate driving in for flushing during the gap time from roller pulling out to roller loading, and also adjusts the guide plate opening size, so that the guide plate and the frame can be fully flushed, and the garbage and foreign matter on the frame and the guide plate are effectively and thoroughly flushed, thereby reducing the quality problems in the rolling process.

Description

Technical Field

[0001] The invention relates to the technical field of hot rolling and finishing mill frame cleaning and flushing, in particular to a method for automatically flushing a mill frame during finishing rolling roll changing. Background Art

[0002] During the conventional finishing rolling process, there is a lot of dust on site. Affected by the water vapor in the rolling process, dust will accumulate on the rack equipment. When it accumulates to a certain extent, it will form block-shaped and point-shaped garbage foreign objects that fall onto the surface of the strip, affecting the surface quality of the strip. There is also a risk of damaging the roller surface, which leads to temporary replacement of the working rollers on site.

[0003] The general roll changing operation is: the operator manually punches out the guide plate, drives the roll to be pulled out by the roll changing trolley, and moves the roll changing trolley to the roll changing position for roll changing. At present, the frame dust is cleaned during the roll changing. Since the guide plate is in the punched out state during the roll changing, the roll cooling water nozzle is opened to flush the frame. Only part of the guide plate is flushed, and the rest of the guide plate is blocked and cannot be flushed, resulting in inexplicable roll marks, iron ash and other defects after rolling, and poor cleaning effect. Summary of the invention

[0004] The purpose of the present invention is to provide a method for automatically washing a frame during finishing roll changing with good cleaning effect, which can completely wash away dust and foreign matter on the frame and the guide plate.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a method for automatically flushing a frame during finishing roll changing, characterized in that it comprises the following steps: during the finishing roll changing process, when the roll is pulled out of the frame, the roll cooling water nozzle is opened to start flushing the frame; when the roll changing trolley travels a distance of X, the guide plate at the entrance of the finishing mill frame is automatically driven in, and after being driven in place, it stops and is maintained for 3-8 seconds, and the guide plate is automatically opened to a guide plate opening size of Y; after the opening size is maintained for 3-8 seconds, the guide plate continues to be opened until the guide plate opening size is Y+Z, and stops; wherein X is 20000-27000mm, Y is 1000-2000mm, and Z is 200-400mm; when the roll changing trolley travels to the roll changing position, the guide plate is automatically driven out, and after the guide plate is driven in place, the roll cooling water nozzle is closed to complete the entire flushing process.

[0006] Furthermore, when the travel distance of the roll-changing trolley is 26,000, the entrance guide plate of the finishing mill stand is automatically driven in.

[0007] Furthermore, the guide plate opening dimension is Y=1500mm.

[0008] The beneficial effect of the present invention is: by adopting the method of the present invention, based on the roll changing process, in the gap time between roll withdrawal and roll loading, the guide plate is automatically driven in for flushing, and the guide plate opening size is adjusted at the same time, so that the guide plate and the frame can be fully flushed, and the garbage and foreign matter on the frame and the guide plate can be thoroughly flushed away, thereby reducing quality problems in the rolling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0010] Figure 1 It is a schematic diagram of the process of the present invention.

[0011] Figure 2 It is a schematic diagram of the state of conventional rolling;

[0012] Figure 3 It is a schematic diagram of the guide plate punching out the roller and pulling it out;

[0013] Figure 4 A schematic diagram of the state where the guide plate is driven in for flushing;

[0014] Figure 5 This is a schematic diagram of the state when the guide plate is opened to an opening dimension of Y.

[0015] Figure 6 This is a schematic diagram of the state when the guide plate is opened to an opening size of Y+Z.

[0016] In the figure: 1. Support roller; 2. Roller; 3. Guide plate; 4. Cooling water nozzle; 5. Frame arch. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, the present invention provides a method for automatically flushing a frame during finishing roll changing, comprising the following steps: (1) during finishing roll changing, when the roll is pulled out of the frame, the roll cooling water nozzle is turned on to start flushing the frame.

[0019] Status Figure 3 shown.

[0020] (2) When the travel distance of the roll-changing trolley is X=26000mm, the entrance guide plate of the finishing mill stand is automatically driven in and stops after it is in place (the status is as follows Figure 4After 3-8 seconds, the two guide plates will automatically open to the guide plate opening size Y (as shown in the figure). Figure 5 As shown in the figure), Y=1500mm. Specifically, the guide plate can be opened after being driven into place for 5 seconds.

[0021] (3) After the opening size is maintained at Y for 3-8 seconds (5 seconds is the best), the guide plate continues to open until the guide plate opening size is Y+Z (such as Figure 6 as shown); where Y+Z=1500mm+300mm=1800mm.

[0022] (4) When the roll-changing trolley reaches the roll-changing position, the guide plate is automatically punched out. After the guide plate is punched out into place, the roll cooling water nozzle is closed to complete the entire flushing process.

[0023] Of course, in practical applications, the value of X can be implemented as long as it is within the range of 20000-27000mm, the value of Y can be implemented as long as it is within the range of 1000-2000mm, and the value of Z can be implemented as long as it is within the range of 200-400mm. The above values ​​of X, Y, and Z are only the optimal values ​​for implementation and the best effect.

[0024] When the roll is pulled out of the frame, the frame is first flushed. Then the guide plate is driven in and opened. During the driving in and opening process, the guide plate is flushed over a large range, and dust on the guide plate can be flushed clean. When the roll changing trolley travels to the roll changing position, the guide plate is driven out, and the frame is continuously flushed to prevent dust from falling on the frame when the guide plate is flushed. When the guide plate is driven out in place, the roll cooling water nozzle is closed, and the frame and the guide plate are quickly flushed.

[0025] Preferably, for the convenience of operation, a one-touch flushing button can be provided on the control touch screen of the fine binding line. When the roller needs to be replaced for flushing, the button can be pressed, which greatly improves the convenience of operation.

[0026] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The above content is only used to illustrate the technical solution of the present invention. Simple modifications or equivalent substitutions made by ordinary technicians in this field to the technical solution of the present invention do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A method for automatically washing the frame during roller changing in finishing rolling. It is characterized in that The method comprises the following steps: during the finishing rolling roll changing process, when the roll is pulled out from the frame, the roll cooling water nozzle is turned on to start washing the frame; When the travel distance of the roll-changing trolley is X, the guide plate at the entrance of the finishing mill stand is automatically driven in, and after being driven in place, it stops and maintains for 3-8 seconds, and then the guide plate is automatically opened to the guide plate opening size Y; after the opening size is maintained at Y for 3-8 seconds, the guide plate continues to open until the guide plate opening size is Y+Z, where X is 20000-27000mm, Y is 1500mm, and Z is 200-400mm; When the roll-changing trolley reaches the roll-changing position, the guide plate is automatically punched out. After the guide plate is punched out in place, the roll cooling water nozzle is closed to complete the entire flushing process. When the travel distance of the roll-changing trolley is 26000 mm, the entrance guide plate of the finishing mill stand is automatically driven in.

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