JPS5954413A - Tension controlling method of cold tandem rolling mill - Google Patents

Abstract

PURPOSE:To improve the accuracy of gauge, and to reduce the frequency of breakage, by detecting a sheet tension between stands, and controlling the tension by changing a drooping value of a stand at the front stage or the rear one. CONSTITUTION:A tension of a sheet 3 between the work rolls 1 at a stand of front stage and the work rolls 2 at a stand of rear stage is measured by a tesiometer 4 to obtain an unit tension by using the sheet thickness and sheet width as controlling parameters. The unit tension is inputted to a dead band setter 5, and the setter 5 outputs when the input of the unit tension is lower or higher than a prescribed range of unit tension. The output signal is amplified by an amplifier 6, and the amplified signal is inputted to a dropping value variable circuit 8 through a limiter 7 to input a control signal to a driving motor 10 through an automatic speed regulator 9, thereby controlling the speed of work rolls 2 at the stand of rear stage.

Description

[Detailed description of the invention] This study introduces a method for controlling the coil tension between the coils.

In general, tandem cold tE jJ! , (Jin [
, When installing the coil tip kil plate 4, lu between the stands.
A tension that is 2 to 3 times that of continuous steady pressure is applied to the coil, causing the plate to break. Therefore, if the force changes even by 1 degree due to disturbance, the plate will break. Often.

As a strategy, iilj normal speed i1il1 i;i
l In cold winding, the current value of the motor is given a drooping (Tsukuda'T:) characteristic of 1,000 hP, so that it has a self-repairing function in response to tension fluctuations caused by disturbances. .

However, motor market. lll41, I direct Ggo I
＋J＼し゛〔Famous stuntman constant drooling 1:“
In order to set the drooping value to 1, the setting of the drooping value must be very delicate. In other words, when the 1-゛ looper key 111 is set to a large value, (1) the reduction in mill speed for the stands that have not yet engaged the plate is smaller than the decrease in milling speed for the stand that has already engaged the plate; Biting q) A large amount of tension is applied to I'・j liil and the plate becomes class 10C.

(2) Since Kusunoki r■1 so1 of each stand's mill series is disturbed, the gauge accuracy will be poor.

(3) It becomes difficult to bite into the board because of the large amount of stiffness at the moment of biting into the board.

Meanwhile, there is Ri; f, and with this (1 trace, if you set Dorping Gui to a small j, the self-repair function will not work even if you only have 1 long sword or 1 rib). There is a problem that April is cut off.

1: Add 1 to the mill speed of each stand using the Sen's Gj force old system 6111 method.
11. He knows how to do it. However, this method does not work in the low speed range σ) mil j11 tree 10- positive 1+'+'ft i
f, n 1111 fixed or mountain 9I sweet talk nihi pn L(・
, zjL board jIJI, change is not associated with s 1, so 枦1wa becomes thinner and (, lbi 1(J[
River fit: There is a gap in which t'h becomes larger.

The present invention solves the problems of the conventional technique σ mentioned above.
If the tension of the stand 1llD plate approaches the 111-shaped tension (), the smaller the drooping value, the better = (((((((JI Suzuki, in my knowledge, the tension between the stands Detect the planar force and calculate σ)r as a function of the root force1)
It is also assumed that the 11th stage of the stand is in a straight position.

Hereafter, 杢"1.i light, l 17ii +, hitotuki 1
□16 Clarify.

1st fourth, 71, 1 power G: Yoru Trupinkaku 117
11th + 4r Hurt not shown] 11th line 1st death, +JiJI'Q's stand 1 work roll 1 and rt
> 1 father's stand 11 ri) Work roll 2 and σ)
1, and from the obtained tension between the stands, the plate 111. and 4],! Using the width as a side leg harameter, I want the unit tension, this unit) and the tension as a dead band +
fl < in 5 input, predetermined unit tension fl'+lj [111 YO'J ILL or high value unit tension σ) dead band setting product outputs against human power, this σ] high output + i is amplified by amplifier 6, and limiter 71! l-Trubingi (
tj possible - manually input the circuit 8 and get 1 with 1; off 1! J,
'i': MrlJ r to the drive motor 10 via the A adjustment station 9
+141 signal 61 manpower, if Ryodan's stand H work roll 2 Tsuji 1 Su! II 61]1.

In this way, the force between the plates ζH between the stands is 1. Let nl'j'i' be the unit tension, and then calculate t? iJ
It is possible to control the mill speed of the second stage ■ and change it to a drooping value that is proportional to the unit tension, which allows U <'H between stands = I and n.
, 4 When the force becomes large, this Okoru C1 is done, and the mill speed of both stages is reduced, and the drooping value is 6, and the mill speed is reduced. 1
By reducing the drooping value with a change to the stand T, Itli'il), -61 or 1!
Both r and l become power (IJ"5.Ii'j city is ゛("kiru.

, Z71, , I: i, l, small invention G1-11. is the tension level 1;(, l (1~<71.Ratio 11゛σ)
Keep f constant (1, ta++,'r o-door: #4 h q
) Changes over time are shown in Figure 2. 17) As is clear from No. 2cJ1, the front stage stand is 1.1 (5i2j
：It turns out that the tension level is also low).The first thing is '+I<force)
When the L 'roux 1 -ring is the person, the place 1 ゛ ゛ stand is a large otu dollepping and 7]!゛su、lI・曵】IN
Since the 4 players are also large, the distance between (1 + zo 1.σ) stands (7
) 4j <': 14 people 1 or lower, low soup connoisseur 17V
711 for IL'+ rupture? , - You can say a little.

Sat, as mentioned and turned, due to the reason: 1llkv stand is totoij (drooping (11'+ is small 1
．． Because of C4'+, it is possible to hang the plate 15 in the 1st direction. ! 1/1, [lowering the drooping value with the stage stand and turning the gauge girder N towards 1-10, 60
When reaching the 6th stage l゛ instead of 1, ↓, because the 1st stand also reduces the doping pin fu''I,
Gauge i1゛t' (! is facing).

&'F of 4Jy force level when 1゛ looping value is fixed between 21'\3'A II and Se7i7 stands:
ll,'rt'+V'hitlil,''):r', music j,゛,, 4 Indicated by A, according to a small invention, between the stands with special Curve B shows the tension level (h j'r mouth + jc port) when the stand t1.+l pink value is all set.

In Figure 3, curve A has j:; lj i'/, 1
)', Ilσ) Beak a0 has one bit at the time of biting, heather '61sl (') li:I flill )
, as shown by fJ beak b1 according to the i method (CII":
< , f t i, jLr approaches −'f &t in the 4th period. :I:ta,7):; Itil σ,lbee')
a2*; Yohi b2 is disturbance, &゛('j')ru indecency; I: x t'+l'+ 1llll '1ris l
l'rry) +', showing long J recessive locomotion, this c)
t, '+'), Fuku 1 noe j-1) 1 le (lj force +
7.゛j-東q
) if;il ? with true pink value constant? ;+11
In the method I) 1; the force is 5. Work order 1 and 1. Just as it is 1: It's a gauze, but it's unclear! Fill the 7131 original ++X tension level immediately by the 11 method. Therefore, the small invention G Koyore has the effect that the gauge accuracy is the same '-' and (-1) and the degree of fracture is reduced.
・) ') 21 Z)(,

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a drooping force type according to the present invention;
A graph showing the bonding of +jJ4 force of l 1 wholesaling jl-pigeon house, Figure 8 is between specific stands by A\invention method and rfi'l 6i1+ method with constant true pink value of k? ; This is a small graph comparing changes in J. deer level. 1...1iiJ V<Stand 11...Kakudan Stun l'1.2...Work roll 30. Board t...1;1? Power in' 5...dead band, jl,! 'Sadahan (1... I 11 right j
r;, i 7
... Remi Sota -8... Trooping Imen Kaku Rifu times ll + 11! 2 ... 1') I
し IJ '6me (J and , p, 'I ηshi roasted 2"
H1 () ... (・Pa ~ 1.・Mo m= Ta. Special IRR Applicant J] 11 Gin Steel Co., Ltd. Figure 1 Figure 2 Figure 1 □-Cho 111 Welding Gotsuhen 65- intercostal space

Claims (1)

[Claims] L Tandem cold upper + M; t”lv q> t3iJ
m stage stun)-III)・4C; Detects the long sword, and as the tel number of this I ZQ business force, control the drooping value of the previous [father or kaisetsu stand + 1111
L, control the long sword by changing the mill speed11
4t to do 111,'? ? '+' Tension method for tandem cold rolling.