System and method for preventing deviation of strip steel

Abstract

A system for preventing deviation of a strip steel, comprising spindle rollers, wherein the spindle rollers are arranged at positions in a production line that form wrap angles with the strip steel, and are used for correcting the deviation of the strip steel in the production line; each spindle roller comprises a middle cylindrical roller body; roller profiles composed of straight segments are symmetrically arranged on two sides of the spindle roller; and one end of each straight segment is connected to the middle cylindrical roller body. Further provided is a method for preventing deviation of a strip steel. Spindle rollers can be arranged at any positions in a production line that form certain wrap angles with a strip steel, and automatic deviation correction of the strip steel is implemented by utilizing the wrap angles and tension between the rollers and the strip steel, thereby reducing production and operating costs and minimizing equipment maintenance; and each spindle roller has a structure combining a middle cylindrical roller body with straight segments, thereby preventing excessive stretching of the middle portion of the strip steel relative to other portions caused by the tension of the production line during operation of the strip steel due to the concentration of convexity at the middle of the roller.

Description

A strip steel deviation prevention system and method TECHNICAL FIELD

[0001] The present application relates to the technical field of cold-rolled strip steel production, in particular to a strip steel deviation prevention system and method. BACKGROUND

[0002] Cold-rolled strip steel is an important steel material, which is widely used in the automobile, shipbuilding, aerospace, machinery and other industries. As shown in FIG. 5, the length of the unit of the cold-rolled strip steel plant is hundreds of meters, and the online length of the strip steel is more than one kilometer. When the strip steel deviates to one side, the conventional strip steel deviation prevention technology outputs the strip steel deviation signal to the hydraulic control system through the photoelectric detection system, and the hydraulic cylinder drives the correction roller to swing to the other side to center the strip steel. The existing unit usually has 5-8 sets of correction control systems, which can only meet the correction control of the local section. When the strip steel has a persistent wedge shape, the deviation accident will occur, causing the strip to break and the equipment to be damaged. SUMMARY

[0003] The purpose of the present application is to provide a strip steel deviation prevention system and method, which can automatically correct the deviation of the strip steel running in each section of the unit and eliminate the strip steel deviation accident.

[0004] To achieve the above purpose, the present application realizes the following technical scheme:

[0005] A strip steel deviation prevention system, comprising a spindle roller, the spindle roller is arranged at the position where the unit and the strip steel have an included angle, and is used for correcting the deviation of the strip steel of the unit.

[0006] The middle part of the spindle roller adopts a flat roller body, and the two sides of the spindle roller symmetrically adopt a roller shape composed of straight line segments, one end of the straight line segment is connected to the middle part of the flat roller body, and the diameter d of the two ends of the spindle roller is 500-700 mm.

[0007] The diameter D of the flat roller body satisfies the following formula:

[0008] D=d+4-6mm ①

[0009] The length 1 of the flat roller body satisfies the following formula:

[0010] 1=minimum strip steel width x 1=minimum strip steel width x (10%-12%) ②

[0011] The length L of the spindle roller satisfies the following formula:

[0012] L=maximum strip steel width+(100-120mm) ③

[0013] The unit includes a pickling unit, a cold-rolling unit, a pickling-rolling combined unit, an annealing unit and a hot-dip galvanizing unit.

[0014] A method for preventing strip deviation, the contents are as follows:

[0015] 1) When the center line of the strip is aligned with the center line of the spindle roller, the horizontal component F1 and F2 of the force on the strip are equal;

[0016] 2) When the strip deviates to the left, the horizontal component F2 of the force on the strip to the left decreases, and the horizontal component F1 of the force to the right increases, pushing the strip to move to the right until the center line of the strip is aligned with the center line of the roller, and the horizontal component of the force returns to F1=F2, the spindle roller no longer adjusts the position of the strip;

[0017] 3) When the strip deviates to the right, the horizontal component F1 of the force on the strip to the right decreases, and the horizontal component F2 of the force to the left increases, pushing the strip to move to the left until the center line of the strip is aligned with the center line of the roller, and the horizontal component of the force returns to F1=F2.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] 1、In the unit, the rollers that can form a certain wrap angle with the strip can be arranged with spindle rollers, and the self-adjusting deviation of the strip is realized by using the wrap angle of the strip and the roller and the tensioning force, without the need for photoelectric detection and hydraulic deviation correction system, saving production and operation cost and reducing equipment maintenance;

[0020] 2、Applied to pickling unit, rolling unit, pickling-rolling combined unit, annealing unit, hot galvanizing unit, the deviation of the strip is covered in the whole unit, and the deviation accidents in different sections of different units can be eliminated;

[0021] 3、The spindle roller adopts the structure of combining the middle flat roller body with the straight line segment, avoiding the fact that the strip width direction in the middle is stretched beyond other parts due to the fact that the convexity of the roller is concentrated in one point. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is a schematic view of the structure of the spindle roller.

[0023] Fig. 2 is a schematic view of the equal horizontal component of the force on the strip when the strip is not deviated.

[0024] Fig. 3 is a schematic view of the state when the right horizontal component of the force on the strip is greater than the left horizontal component of the force on the strip after the strip deviates to the left.

[0025] Fig. 4 is the distribution of the spindle roller in the pickling-rolling combined unit.

[0026] Fig. 5 is the distribution of the deviation correction device with a hydraulic deviation correction control system in the pickling-rolling combined unit.

[0027] In the figure: 101-deviation correction roller 102-pickling tank 103-loop car 104-loop 105-cold slag machine 106-edge trimmer. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0029] The following embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. Unless otherwise specified, the methods used in the following embodiments are conventional methods.

[0030]

Example 1

[0031] A self-aligning roll with a special roll shape achieves self-alignment of the strip steel based on mechanical principles. This self-aligning roll has a self-aligning function, eliminating the need for photoelectric detection and hydraulic alignment control systems. It replaces the existing cylindrical flat rolls, achieving full coverage of strip steel alignment within the unit.

[0032] Figure 4 shows a strip deviation prevention system, including spindle rollers. Spindle rollers are installed at the positions where the unit and the strip have a wrap angle, for the purpose of correcting the strip deviation of the unit. The unit includes a pickling unit, a cold rolling unit, a pickling-rolling combined unit, an annealing unit, and a hot-dip galvanizing unit.

[0033] See Figure 1. The middle part of the spindle roller adopts a flat roller body, and the two sides of the spindle roller adopt a roller shape composed of straight segments. One end of the straight segment is connected to the middle flat roller body. The diameter d at both ends of the spindle roller is 500~700mm.

[0034] The diameter D of the flat roller body satisfies the following formula:

[0035] D = d + 4~6 mm ①

[0036] The length 1 of the flat roller body satisfies the following formula:

[0037] 1 = Minimum strip width × (10% ~ 12%) ②

[0038] The length L of the spindle roller satisfies the following formula:

[0039] L = Maximum strip width + (100~120mm) ③

[0040] When the minimum width of the strip produced by the unit is 1000mm and the maximum width is 2150mm, and the diameter of the flat roller is d=550mm, then the following is determined: spindle roller l=1000×10%=100mm, L=2150+100=2250mm, D=550+6=556mm.

[0041] A method for preventing strip misalignment is as follows:

[0042] 1) When the strip steel runs, it has a certain wrap angle and tension force on the roller. When the center line of the strip steel is aligned with the center line of the spindle roller, the horizontal components F1 and F2 of the strip steel are equal, as shown in FIG. 2;

[0043] 2) When the strip steel deviates to the left, the horizontal component F2 of the strip steel to the left decreases, and the horizontal component F1 to the right increases, pushing the strip steel to move to the right until the center line of the strip steel is aligned with the center line of the roller, and the horizontal component returns to F1=F2. The spindle roller no longer adjusts the position of the strip steel, as shown in FIG. 3;

[0044] 3) When the strip steel deviates to the right, the horizontal component F1 of the strip steel to the right decreases, and the horizontal component F2 to the left increases, pushing the strip steel to move to the left until the center line of the strip steel is aligned with the center line of the roller, and the horizontal component returns to F1=F2.

[0045]

Example 2

[0046] In this embodiment, a strip steel deviation prevention system and method is the same as that of Example 1, and the application position of the spindle roller in the unit is increased on the basis thereof.

[0047] Referring to FIG. 4, taking a pickling and rolling mill-universal unit as an example, the spindle roller replaces the flat roller on the prior art unit:

[0048] 1) Replaces 1# driving roller group 1

[0049] The 1# driving roller group is responsible for driving the strip steel between the inlet section 0-1, and inputs the strip steel between the inlet section 0-1 into the inlet loop between 1-3. After replacement, it can ensure that the strip steel runs in the center in the inlet section and the inlet loop.

[0050] 2) Replaces inlet loop roller 2

[0051] The inlet loop roller 2 is responsible for turning and guiding the strip steel between 1-3 in the inlet loop. After replacement, it can ensure that the strip steel runs in the center between the inlet loop roller 3 and the process section front guide roller 4.

[0052] 3) Replaces inlet loop outlet guide roller 3

[0053] The inlet loop outlet guide roller 3 is responsible for changing the horizontally running strip steel into vertically upward running. After replacement, it can ensure that the strip steel runs in the center between the inlet loop roller 3 and the process section front guide roller 4.

[0054] 4) Replaces process section front guide roller 4

[0055] The process section front guide roller 4 is responsible for changing the vertically running strip steel into horizontally forward running, so that the strip steel enters the pickling tank. After replacement, it can ensure that the strip steel runs in the center between 3-4 and 4-5.

[0056] 5) Replaces 2# driving roller group 5

[0057] 2#Transmission roller group 5 is responsible for the transmission of the strip between process sections 4-6, and after replacement, it can ensure the centering operation of the strip between process sections 4-6.

[0058] 6)Replace the process section exit guide roller 6

[0059] The process section exit guide roller 6 is responsible for changing the horizontal operation of the strip in the process section to downward operation, and after replacement, it can ensure the centering operation of the strip between process sections 4-6.

[0060] 7)Replace 3#Transmission roller group 7

[0061] 3#Transmission roller group 7 is responsible for conveying the strip in the process section into the exit loop 7-9, and after replacement, it can ensure the centering operation of the strip between exit loops 7-9.

[0062] 8)Replace the exit loop guide roller 8

[0063] The exit loop guide roller 8 is responsible for the turning and guiding of the strip in the exit loop, and after replacement, it can ensure the centering operation of the strip between exit loops 7-9.

[0064] 9)Replace 4#Transmission roller group 9

[0065] 4#Transmission roller group 9 is responsible for the transmission of the strip between exit sections 9-10, and after replacement, it can ensure the centering operation of the strip between exit sections 9-10.

[0066] 10)Replace the pre-rolling loop entrance guide roller 10

[0067] The pre-rolling loop entrance guide roller 10 is responsible for changing the horizontal operation of the strip in the exit section to vertical upward operation. After replacement, it can ensure the centering operation of the strip between 10-11.

[0068] 11)Replace the pre-rolling loop horizontal guide roller 11

[0069] The pre-rolling loop horizontal guide roller 11 is responsible for changing the vertical operation of the strip to horizontal operation, and after replacement, it can ensure the centering operation of the strip between 11-12 in the pre-rolling loop.

[0070] 12)Replace the pre-rolling loop guide roller 12

[0071] The pre-rolling loop guide roller 12 is responsible for the turning and guiding of the strip in the pre-rolling loop. After replacement, it can ensure the centering operation of the strip between 12-13 in the pre-rolling loop.

[0072] 13)Replace the pre-rolling loop guide roller 13

[0073] The pre-rolling loop guide roller 13 is responsible for the turning and guiding of the strip in the pre-rolling loop. After replacement, it can ensure the centering operation of the strip between 13-14 in the pre-rolling loop.

[0074] 14) instead of pre-rolling loop guide roller 14

[0075] Pre-rolling loop guide roller 14 is responsible for the strip turning guide in the pre-rolling loop, and after the replacement, it can ensure the strip centering operation between 14-15 in the pre-rolling loop.

[0076] 15) instead of pre-rolling loop guide roller 15

[0077] Pre-rolling loop guide roller 15 is responsible for changing the horizontal operation of the strip at the pre-rolling loop outlet to vertical downward operation, and after the replacement, it can ensure the strip centering operation between 15-16.

[0078] 16) instead of pre-rolling loop horizontal guide roller 16

[0079] Pre-rolling loop horizontal guide roller 16 is responsible for changing the vertical operation of the strip to horizontal operation, and after the replacement, it can ensure the strip centering operation between 16-17.

[0080] 17) instead of 5# drive roller set 17

[0081] 5# drive roller set 17 is responsible for conveying the strip to the rolling mill, and after the replacement, it can ensure that the strip enters the rolling mill in a centered and flat state.

[0082] The present application can be arranged with a spindle roller in the unit that can form a certain wrap angle with the strip, and the self-correcting of the strip is realized by using the wrap angle of the strip and the roller and the tensioning force, without the need for photoelectric detection and hydraulic correction system, saving production and operation cost, and reducing equipment maintenance amount; it is applied to pickling unit, rolling unit, pickling-rolling combined unit, annealing unit, hot galvanizing unit, and can eliminate the strip deviation accidents in different sections of the unit; the spindle roller adopts the structure of combining the middle flat roller body with straight line segment, avoiding the situation that the strip width direction in the middle is stretched beyond other parts due to the tension of the unit because of the concentration of the roller middle convexity in one point.

Claims

1. A system for preventing strip run-off, characterized by The spindle roller is arranged at the position where the machine set and the strip steel have an included angle, and is used for correcting the deviation of the strip steel of the machine set; The spindle roller has a flat roller body in the middle part, and has a roller shape composed of straight line segments on both sides of the spindle roller, one end of the straight line segment being connected to the flat roller body in the middle part, and the diameter d of the spindle roller at both ends being 500-700 mm; The diameter D of the flat roller body satisfies the following formula: D=d+4-6mm ① The length 1 of the flat roller body satisfies the following formula: 1=the minimum strip steel width×(10%-12%) ② The length L of the spindle roller satisfies the following formula: L=the maximum strip steel width+(100-120mm) ③ 2. The strip steel deviation prevention system of claim 1, wherein The machine set comprises an acid pickling machine set, a cold rolling machine set, an acid pickling and rolling combined machine set, an annealing machine set and a hot galvanizing machine set.

3. The system of any one of claims 1-2 for use in a method of preventing strip deviation, wherein, The content is as follows: 1) when the center line of the strip steel is aligned with the center line of the spindle roller, the horizontal components F1 and F2 of the force on the strip steel are equal; 2) when the strip steel deviates to the left, the horizontal component F2 of the force on the strip steel to the left decreases, the horizontal component F1 of the force on the strip steel to the right increases, and the strip steel is pushed to move to the right until the center line of the strip steel is aligned with the center line of the roller, the horizontal components of the force are restored to F1=F2, and the spindle roller no longer adjusts the position of the strip steel; 3) when the strip steel deviates to the right, the horizontal component F1 of the force on the strip steel to the right decreases, the horizontal component F2 of the force on the strip steel to the left increases, and the strip steel is pushed to move to the left until the center line of the strip steel is aligned with the center line of the roller, and the horizontal components of the force are restored to F1=F2.

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