JPS5933017A - Device for controlling rolling dimension - Google Patents

Abstract

PURPOSE:To control the dimensions of rolling materials with high accuracy when bar steel is rolled with a rolling mill equipped with both vertical and horizontal rolls, by changing the combination of roll clearance control and roll speed control for each dimension controlling direction. CONSTITUTION:When a rolling material 1 is rolled in a 4-stand continuous rolling line composed of vertical rolls V1 and V2 and horizontal rolls H1 and H2, the dimension in the vertical direction DH of the material 1 is detected by means of a meter 2 for vertical dimension and the value is compared with a reference dimension DHR in the vertical direction by means of a deviation operator 3 and a deviation DH is found, and then, the dimension DH is inputted into a monitor rolling reduction control device 4 and a reference oiling location HYDR is obtained. The reference oiling location HYDR is inputted into the hydraulic rolling down device 5 of the horizontal rolls. Similarly, the dimensional deviation DELTADW of the dimension DW in the right-left direction of the material 1 is inputted into a monitor speed control device 8 and a correcting value for the speed of the vertical roll V2 is obtained and inputted into the vertical roll. The vertical dimension of the material 1 is controlled by controlling the tension between the horizontal rolls by the rolling reduction of the horizontal roll H2 and the horizontal dimension is controlled by controlling the tension between the vertical rolls by the speed control of the roll V2, and thus, the dimensional accuracy of the material 1 is improved.

Description

[Detailed description of the invention] [□Technical field of the invention] □One invention i
□ Rolling dimension □ Control equipment'a K, Rolling machine, especially consisting of vertical roll □ and horizontal j-roll. The present invention uses a compact reduction casting device suitable for controlling the material recall of the rolled material to a desired value. −″ □−□ [Background of scrap technology!] In general, in J-Steel continuous rolling mills, the rough rolling stands and intermediate row stand groups have vertical stones and horizontal holes.
There are many cases where Nir is employed by unions. In the rolling machine having such a configuration, the material shoulder rolling mk is pre-rolled according to the product dimensions without any movement or control of the material roll gap. Set the gap, its 1″
Well state + rolling material.辷；Each 'stand'r
m
When the material is rolled along the roll gap, control is performed to indirectly change the cross-sectional shape of the material.

[Problems with back ridge technique]

However, in such conventional Mibu machines, it is difficult to improve the accuracy of the dimensions and shape of the material cross section. The gap between the rolls is 1 leg (Wα)! ! ＃4 difference is included, so the JQ force that bends the stand by inter-stand tension control is minute, but there is a limit to the accuracy of material dimensions due to the C1 difference between k and (2, stiffness) when the tension is in the non-tension state. There is. +T2, Houna 1h11jo who actually measures the size of the needle and returns it to the 1011 groan system.
However, since the practical use of materials has not been carried out, it is not possible to accurately
ll mountain] (Not to mention 2, there was a problem in that it was difficult to further improve the accuracy of the 4A1 dimension.

[Purpose of the invention]

Using the present invention v) 1-1 target vertical roll and 4 flat rolls σ〉 assembly, the alignment of the roll gap during 1st rolling is completely 1-1. Set rolling mill 1 (Continuous II: Rolling machine out: U++ is equipped with a top and bottom method, 11゛ and a left and right dimension meter, and measure the - Based on the old difference in the dimensional standards of the roll gap (~material dimensions and shape by modifying the roll speed) it is possible to increase the stacking capacity completely.
In this case, we will provide a rolled-shape forming device f.

[Summary of the invention]

At the 7j point when the target 1 is set at 7j, the roll of silk 1 is rolled in the direction of $1, and the rolled material is rolled in the direction of F in the second direction. a second roll that extends;
4': A's direction of 2 - 1 modulus f plate set [7 and this is [: 2nd roll σ) gap so that it becomes 1 elevation value] -
Measure the dimension in the 1st σ direction of the I-fE elongated material and control the speed of the first roll so that it becomes 11%. ) and α).

[Embodiments of the invention]

Hereinafter, the present invention will be described with reference to the drawings.
"Ru.

The drawing is a schematic diagram of a continuous rolling mill equipped with an aE rolling dimension control device according to an embodiment of the present invention. In the same figure, LL rolled material 1 has snoring rolls vi, V2 +lF and Cζ
It is rolled on a continuous strip-rolling line consisting of ζ water mouth roll n1) (20) 4 stand force). Valley roll Vl, V2, H
l.

112 is the motor MVi I MV21 Ml respectively
□+IMH2 causes 1. 2. However, the speed of the motor is 11 busy II 1 cone 81, , , s
R,,2,SRO,,SR□2 make city 1'' mountain 1, respectively. A vertical dimension meter 2 is installed at the elevation 1 of this ML threaded copper rolling line, that is, the output 1 of the horizontal roll H2, to detect the dimension DH of the I'E abrasive material 1 in the vertical direction. This ・1′ method 1″)I(Triil difference calculator 3 calculates the vertical dimension deviation DI(N,,I−1”),
・As a result of this, the vertical dimension deviation ΔD□ is equalized. This vertical dimension deviation ΔDH is input to the monitor 1 and the lower control device 4, but here, a certain point of Hikaruzu FE Seirin 1 is measured from the water 5F roll ■ 2 to the vertical dimension meter 2 trench. rp), that is, the dead time TL of power reduction 1, the abstract f[11 compensation is applied, and then the oil column position reference flYD is obtained by multiplying by the monitor downstream IIi control gain. This oil column position reference HYI)R is monitor I] lower control f & 4 + device 4
Oil ITE r: (: Lower device 5
output).

Note that the oil column position reference HYDR is determined by the following formula σ).

However, k, 14 constant, L, (m) Irf, distance from horizontal roll H2 to vertical dimension meter 2, vH2 (rrv
'f'J') is 7 at the circumferential speed of roll H2.

On the other hand, in addition to detecting the vertical dimension l)H using the vertical dimension meter 2, the horizontal dimension DW in the right direction is
is being detected. This .-r method DW is compared with the left-right dimension reference DwR by the deviation calculator 7, and as a result, the left-right dimension deviation ΔT)W is obtained. This left-right dimension deviation DW is input to the monitor 1gA degree control head 8, but here, first, precision is applied to compensate for the control dead time TL□ (seconds) from the horizontal roll H2 to the left-right dimension meter 6. Next VC
The speed correction of vertical roll V2 - ΔNv2 is calculated by multiplying by the monitor speed control gain (PO) which takes into account the influence of the tension between vertical roll V2 and horizontal roll 82 on the left and right dimensions of the material on the exit side of horizontal roll H2. Rajru. and σ) Vehicle speed correction view Δ'V2
is outputted from the monitor speed jllll fa11 device 8 to the adder 9 and the speed balancing circuit 10 [2]. .

What?1? , series of vertical rolls V2, degree correction ridge ゛ΔNY2,
is calculated as follows. □However,
The k2 constant, TJ 2 ("m), is the distance from the horizontal roll H2 in the left-right dimension 1i6i.

The storage level standards for each stand and de are listed above according to their subscripts.
f 1llt1 to NV'+'h l N+7 +l(
l NV2R, meeting u'2'R-"Aotsu. Horizontal roll 1
12. C [consecutive cold weather market, , so speed standard ~ 2R]
Gita is in daily roll (-) according to
In this case, by inputting the speed correction IΔNv2 to the adder 9, the fiT speed-reference Nv2 is obtained from the following equation.

N −N 10△NV2 ・・・・・・・・・
...(5) vz ~ V2R Here, if the horizontal roll 112 is used as a pivot stand and the speed is kept constant, the speed correction amount ΔNv2 in V2 will change j11 leftover d ice power a shore - power unawate one in i' A vt
rx". To prevent this, it is necessary to balance the upstream side by the amount found in the speed correction loss ΔNv2 and correct the speed.
Tomobi Ichironi t Q”z a;
1, nH1, vH2. The speed balance circuit 10 is inputted with the speed correction □correct amount ΔN of the vertical roll V''2. Q1'/'vz is multiplied, and the old speed correction amount ΔN□ is outputted to the horizontal force 1. This □ old speed correction amount ΔNH1 is expressed by the following equation. □As a result,
New horizontal roll H1 speed reference horse.

is IJI] Calculator ''11, the following formula is as follows:
NH4-NH1R±ΔNH1・・・・・・・・・・・・
(7) Similarly, the vertical roll ■1 is also determined by the speed balance circuit 12, so the new speed standard for the vertical roll Vl is 7JI.
The following equation is obtained by the nasal organ 13.

Nv, 2 NV1R + Δ”Vl ””'・Song - (
9) Speed reference NV, I NH1 obtained as described above
INV21 N+12Rr: "Input to motor speed control device #5Rv1°8 RH,, 8Rv2. lH, and each roll Vl.

81, V2. H2 is limited to a speed according to the corresponding self-speed standard.

Through such control, the material dimensions in the vertical direction on the exit side of the continuous long steel rolling line are controlled by the rolling of the horizontal roll H2, and the material dimensions in the horizontal direction are controlled by controlling the speed of the vertical roll 2 and horizontally. This will be controlled by controlling the tension of the roll H2.

As a result, both the vertical dimension and the horizontal dimension of the compressed material 1 can be precisely controlled to desired values. In other words, in general, disturbances such as changes in entry side dimensions and changes in front and rear tension in a horizontal stand have almost no effect on vertical dimensions, and changes in width dimensions due to width expansion.
In other words, it is known that dimensional fluctuations in the left and right direction appear on the exit side of the horizontal roll. Therefore, in this embodiment, this relationship is actively used to control the material dimensions in the left-right direction, and by actively adjusting the roll gap of the horizontal roll H2 of the final stand, the I oblique cross-sectional shape dimension is It is of ability to control for a longer time overall.

Note that the implementation of the present invention is not limited to the above-mentioned embodiments, but may be configured such that the vertical rolls are controlled with a roll gap and the 7KXP-rolls are controlled with speed, and the number of vertical rolls and horizontal rolls is Even if the arrangement is different, it is fully applicable within the scope of the idea of the present invention, and the same effects can be obtained.

〔Effect of the invention〕

As described above (according to the uninvention), roll gap control and roll speed control, that is, tension control, are performed in the direction #+1- of the suppressing dimension.
By assembling the L1E grinding material with a different size,
By making it possible to perform the method over M sections (1till?al''N-), it is possible to obtain a rolling dimension control device.

[Brief explanation of drawings]

Drawing er This invention σ To real/A! + 1+lJ K related F
This is a schematic diagram of the beak construction of a one-leaf moth machine that has both l and dimensional control devices. Vl, V2... Lo roll, Ill, H2... Half roll to 7, MVl ・MV2 ・MIII I M11
2°'° motor, 5RV1.5Rv2°bll,,,
, S%□...Motor speed + 1llI# device, 2.
・・Top and bottom dimensions, 4...Monitor LL lower 1f++1 height 1
Device, 5... Oil 11 Lowering device, 6... Left and right dimensions 11
．． 8...Monitor speed control device, 1()...Speed ΔI
L balance] 11th path, 12...speed balance circuit. One representative Kiyoshi Inomata (11)

Claims (1)

[Claims] 1. A first roll □□ that rolls the rolled material in a first direction, and a 2σ roll that rolls the rolled material in a second direction;
a second control means for measuring the dimension of the rolled material in the second direction and controlling the gap between the rolls @2 so that this becomes the target value; and a second control means for measuring the dimension of the rolled material in the first direction. This is a rolled material size control device which consists of a '10th lever' which controls the speed of the first roll so that the target value is met. 2. First □: The rolls are located on the upstream side of the flow of the rolled material at the second pair of rolls □, and the second pair of rolls □ measures the dimensions of the rolled material.
The elongation control device according to claim 1, characterized in that the elongation is carried out on the downstream side of the rolls.