JPH0253125B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an edger roll opening detection method suitable for detecting the roll opening of a width rolling mill (edger) having vertical rolls.

[Conventional technology]

FIG. 1 is an explanatory diagram showing the structure of a general edger for controlling the width of a rolled material 1 and a conventional edger roll opening detection method. In this edger, a pair of left and right vertical roll jocks 12 and 13 are disposed in an edger housing 11, and vertical rolls 14 and 15 are respectively pivotally supported on each of the vertical roll jocks 12 and 13. It can be driven by driving force applied via drive shafts 16 and 17. Further, rolling down screws 20 and 21 are connected to the back surfaces of the vertical roll jocks 12 and 13 via rolling down pressure blocks 18 and 19, respectively, and worm wheels 22 and 21 are connected to each rolling screw 20 and 21, respectively.
23 are screwed together, and worm shafts 24 and 25 are engaged with each of the worm wheels 22 and 23, respectively.
Each worm shaft 24, 25 has a lowering motor 2.
6 and 27. That is, the left and right vertical rolls 14, 15 are operated by the rolling motor 2.
6 and 27, the opening can be changed.

Further, each of the reduction screws 20 and 21 is provided with a pulse oscillator 31 and 32, respectively. is vertical roll opening calculation device 3
3, the opening degrees of the vertical rolls 14 and 15 are calculated. The calculation result of the vertical roll opening degree calculation device 33 is transmitted to the vertical roll opening degree control device 34, so that the opening degrees of the vertical rolls 14 and 15 can be controlled.

[Problem to be solved by the invention]

However, the above prior art has the following problems.

In other words, the conventional edger roll opening detection method is an indirect detection method that uses the edger housing as a reference and detects the rotational pulse of the drive system for changing the vertical roll opening or the position of the hydraulic pressure cylinder. Since the position is not detected, detection errors based on the following (1) to (4) cannot be avoided with respect to the true roll opening degree.
That is, (1) elastic deformation of the edger housing 11, (2) vertical roll jocks 12, 13, reduction pressure blocks 18, 19, reduction screw 2.
Compressive elastic deformation of 0,21 etc., (3) Vertical roll 14,1
Deflection and flattening of 5, (4) Vertical rolls 14, 15
wear, changes in roll profile due to thermal expansion,
is the cause of the error. The total amount of deflection based on the above error causes (1), (2), and (3) is based on the fact that the rigidity of a general slab width rolling mill is around 100 to 150 ton/mm.
When calculating the width rolling load as 400 tons, it is 2.6 to 4.0
mm, and high width rolling accuracy cannot be expected with such an edger. moreover,
The problem is that when the roll profile change based on the above error cause (4) is added to the deflection based on the above error causes (1), (2), and (3), the width rolling accuracy in the edger further deteriorates. There is.

The present invention has been made in view of the above-mentioned conventional problems, and is an edger that can always detect the roll interval with high accuracy regardless of whether the rolled material is bitten (metal-in) or not (metal-off). The purpose of the present invention is to provide a roll opening detection method.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides left and right vertical rolls 1 which are pivotally supported by left and right vertical roll jocks 12 and 13 disposed in an edger housing 11.
In the edger roll opening detection method of detecting opening degrees Wo of 4 and 15 when metal is in or metal off, the left and right vertical roll chocks 12 and 1 are
The distance l ₁₁ from the absolute reference positions 1A, 1B that are completely independent from the edger of the reference planes 43, 44 of 3.
l ₁₂ and the distances l 21 and l 22 from the reference planes 45 and 46 of the left and right vertical roll jocks 12 and 13 to the surface of the rolling material contact portion of the left and right vertical rolls ₁₄ and ₁₅ on the side opposite to the rolled material 1 are detected. , based on the detected value and the calculated value of the roll diameters d ₁ and d ₂ of the rolling material contact portions of the left and right vertical rolls 14 and 15 during metal-off, the left and right vertical rolls 1 during metal-in or metal-off are determined.
It is characterized by detecting opening degrees Wo of 4 and 15.

[Effect]

According to the above configuration, when detecting the opening degrees of the left and right vertical rolls, measurement values including error factors are not used, so elastic deformation of the edger housing, compressive elastic deformation of the vertical roll choke, etc., deflection of the vertical rolls, etc.
In addition, detection errors in the roll opening degree due to changes in the roll profile of the vertical rolls can be completely eliminated, and an accurate roll opening degree can be obtained in either case of metal-in or metal-off.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. In this example, a preset value is used that is unrelated to the presence or absence of biting of the rolled material, and for the diameter of the vertical roll, a calculated value at the time of metal off is used to eliminate errors caused by roll deformation during biting. This is stored in advance and used, and together with these values, the detected value at metal-in is used when the metal is in, and the detected value at the time when the metal is off is used when the metal is off to determine the roll opening degree in each case.

FIG. 2 is an explanatory diagram showing an edger to which the edger roll opening detection method according to the present invention is applied. This edger, like the general edger shown in FIG. 20, 21, worm wheels 22, 23, worm shafts 24, 25, and reduction motors 26, 27.

Furthermore, in this edger, first detectors 41 are located at absolute reference positions 1A and 1B, which are completely independent of the edger and which are distances L ₁ and L ₂ in the roll opening direction, on the left and right sides of the edger pass center C, respectively. , 42 are installed. Each first detector 4
Vertical roll yoke 12, 13 opposite to 1, 42
Detection surfaces 43 and 44 are installed on the outer surfaces of the detectors, respectively, and the first detectors 41 and 42
The distances l ₁₁ and l ₁₂ of the detection surfaces 43 and 44 in the roll opening direction with respect to A and 1B can be detected.
That is, the first detectors 41 and 42 are capable of detecting the absolute positions of the vertical roll jocks 12 and 13 in the roll opening direction.

Further, a reference surface 45 is provided on the inner surface of each vertical roll chock 12, 13 facing the opposite position in the diametrical direction with respect to the contact portion of the rolled material of each vertical roll 14, 15, respectively.
46 is formed, and second detectors 47 and 48 are installed on each reference plane 45 and 46, respectively. Second
Detectors 47 and 48 detect respective distances l ₂₁ and l ₂₂ in the roll opening direction with respect to reference surfaces 45 and 46 of vertical roll jocks 12 and 13 at diametrically opposite positions with respect to the rolled material contact portions of vertical rolls 14 and 15. It's becoming possible.

In addition, in FIG. 2, l ₀ is the detection surface 43, 44 and the reference surface 45, of each vertical roll choke 12, 13.
46, which is a predetermined value for this edger. Further, d ₀ is the distance between the axes of the vertical rolls 14 and 15 and the reference planes 45 and 46 of the vertical roll jocks 12 and 13 when the metal is off, and is a predetermined value for this edger. Further, d ₁ and d ₂ are the respective diameters of the contact portions of the rolled material of the vertical rolls 14 and 15 at the time of metal-off, and as will be described later, the distance d ₀ is measured by the second detectors 47 and 48. It is calculated by subtracting the detected distances l ₂₁ and l ₂₂ .

Next, a specific procedure for making it possible to detect the distance between the rolled material contact portions of the left and right vertical rolls 14 and 15, that is, the true roll opening W ₀ in the edger, is as follows.
This will be explained with reference to FIG. The gate 51 closes only when the rolling material jamming presence/absence detector 52 detects a metal-off state, and transmits the detection values l ₂₁ and l ₂₂ from the second detectors 47 and 48 to the roll diameter calculator 53. The roll diameter calculator 53 uses this detected value l ₂₁ ,
l ₂₂ and the distance d ₀ , the diameter d ₁ of the contact part of the rolled material when the vertical roll 14 is off the metal and the diameter d ₂ of the contact part of the rolled material when the vertical roll 15 is off the metal are calculated as follows: d ₁ = 2(d ₀ -l ₂₁ ) ......(1) d ₂ = 2 (d ₀ -l ₂₂ ) ......(2). The calculated values d ₁ and d ₂ calculated by the roll diameter calculator 53 are stored in the storage device 54 . Here, the calculated values d ₁ and d ₂ stored in the storage device 54 are always the values at the latest metal-off time, and the latest wear of the vertical rolls 14 and 15,
It is now possible to understand the roll profile due to thermal expansion.

The roll opening computing unit 55 uses preset distances L ₁ , L ₂ , l ₀ , diameters d ₁ , d ₂ , etc. inputted from the storage device 54, and the first
Detection values l ₁₁ , l ₁₂ input from the detectors 41 and 42,
From the detected values l ₂₁ and l ₂₂ inputted from the second detectors 47 and 48, the true roll opening degree W ₀ at the time of metal-in and the first roll opening degree at the time of metal-off are determined.
Detection values l ₁₁ , l ₁₂ input from the detectors 41 and 42,
From the detection values l ₂₁ and l ₂₂ inputted from the second detectors 47 and 48, the roll opening degree W ₀ at the time of metal off is determined as W ₀ =L ₁ −(l ₁₁ +l ₀ +l ₂₁ +d ₁ ) +L ₂ −(l ₁₂ +l ₀ +l ₂₂ +d ₂ ) ...... Calculate based on (3).

According to the above embodiment, as described above, (1) elastic deformation of the edger housing 11, (2) vertical roll jocks 12, 13, reduction pressure blocks 18, 1
Detection error of the roll opening degree based on compressive elastic deformation of the screws 9 and the screws 20, 21, (3) deflection of the vertical rolls 14, 15, and (4) changes in the roll profile of the vertical rolls 14, 15 due to wear and thermal expansion. can be completely eliminated.

Note that the influence of detection error on the roll opening degree due to flattening of the vertical rolls 14 and 15 is so small that it can be ignored as described below. That is, since the Young's modulus E of the surface layer of the vertical roll is considered to be 1.6 to 1.8 × 10 ⁴ Kg/mm ² , the diameter of the vertical roll is 1000 mm, and the rolling load is 400 to 500 tons, which is slightly higher than the conventionally known value.
Assuming that the thickness of the rolled material is 150 mm and the width reduction amount is 60 mm, the contact area A between the vertical roll and the rolled material is A√500×60×150 (4), and the flattening strain ε generated in the vertical roll is , where R is the radius of the vertical roll and ΔR is the flattening amount, ε=ΔR/R=ΔR/500 (5). In other words, 450/A=E×ε=1.7×10 ⁴ ×ΔR/500 (6) Therefore, the flattening amount ΔR that occurs in the vertical roll
teeth, It is recognized that this is a very small and negligible value compared to the error amount based on the error causes (1) to (4).

The first detectors 41, 42 and the second detectors 47, 48 used in the above embodiments may be a distance meter using a laser, a distance meter using an overcurrent method, an optical non-contact distance meter, or the like. That's good.

〔Effect of the invention〕

As described above, the present invention provides an edger roll opening degree detection method for detecting the opening degree of left and right vertical rolls pivotally supported by left and right vertical roll chocks disposed in an edger housing during metal-in or metal-off. The distance from the absolute reference position of the reference surface of the left and right vertical roll chock that is completely independent from the edger, and the distance from the reference surface of the left and right vertical roll chock to the surface of the rolled material contacting part of the left and right vertical rolls on the side opposite to the rolled material. The opening degree of the left and right vertical rolls during metal-in or metal-off can be detected based on the detected value and the calculated value of the roll diameter of the rolling material contact portion of the left and right vertical rolls during metal-off. In the setup and dynamic control of the edger, the roll opening degree can be controlled with high precision and the sheet width control can be improved.

[Brief explanation of the drawing]

FIG. 1 is a surface view showing a conventional edger roll opening detection method, and FIG. 2 is a surface view showing an embodiment of an edger to which the edger roll opening detection method according to the present invention is applied. FIG. 3 is a flowchart showing a specific procedure for detecting the roll opening degree in the same embodiment. 1A, 1B... Absolute reference position, 11... Edger housing, 12, 13... Vertical roll chock, 14, 15... Vertical roll, 41, 42... First detector, 47, 48... Second detection vessel.

Claims (1)

[Claims] 1. Edger that detects the opening degree W ₀ of left and right vertical rolls 14 and 15 pivotally supported by left and right vertical roll jocks 12 and 13 disposed in edger housing 11 when metal is in or metal off. In the roll opening detection method, the distances l 11 and l 12 from the absolute reference positions 1A and 1B that are completely independent from the edger of the reference planes 43 and 44 of the left and right vertical roll jocks 12 and 13, and the distances l ₁₁ and l ₁₂ of the left and right vertical roll jocks 12 and 13 Reference plane 45,4
Distance l ₂₁ to the surface of the rolled material contacting portion of the left and right vertical rolls 14, 15 on the side opposite to the rolled material 1 with respect to 6,
l ₂₂ is detected, and based on the detected value and the calculated value of the roll diameters d ₁ and d ₂ of the rolling material contact portions of the left and right vertical rolls 14 and 15 during metal-off, the left and right vertical rolls during metal-in or metal-off are determined. 14,15
A method for detecting the opening degree of an edger roll, characterized by detecting the opening degree W ₀ of the edger roll.