JPS5954412A - Controlling method of caliber rolling mill - Google Patents

Abstract

PURPOSE:To obtain products of steel bar and wire rod having high dimensional accuracies, by calculating the deviation between the dimensions in the width direction of a material to be rolled at the inlet and outlet sides of a stand, and adjusting the deviation to a prescribed value by controlling the rolling loads at said stand and a stand prior to it. CONSTITUTION:A rolling load at the (i-1)th stand is detected by a load detector 21, and its detecting signal is fetched to a calculator 10 through a delay circuit 6 to calculate the dimension in the direction of rolling reduction at the outlet side of the (i-1)th stand. Further, the calculator 10 calculates simultaneously a rolling load at the (i)th stand so that the deviation DELTAHi between the dimensions in the width direction at the inlet side of the (i)th stand and the dimension at its outlet side satisfies a prescribed value alpha, and adds a control signal with which said rolling load is obtained to a rolling reduction controlling device 42 of the (i)th stand. Next, the device 42 drives a rolling reduction device 32 to control a roll gap.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a slot-hole type F(', rolling machine) for processing a steel bar or rolling stock of a predetermined size by using a groove roll. In particular, the present invention relates to a 6:11 method for keeping constant the deviation between the widthwise dimension of the first rolled material on the inlet side of the stand and the widthwise dimension of the rolled material on the outlet side of the stand.

[Technical aspect of the invention [1 and the disadvantages] Generally, a steel bar or wire is continuously rolled by an LE rolling mill RY equipped with groove rolls.This groove rolling mill is composed of many types of grooves. Typical types of holes are diamond hole type, square hole type, round hole type, oval hole type, round hole type, etc. By applying 1lli 4th pass to the hole mold of 1lli 4th time), the final product of fl.

During this heating, the rolling 11 with the grooved rolls is mainly due to three-dimensional deformation, and the rolling margin is 1/C sequentially 1/C from the orthogonal shift direction. Unlike rolling, which mainly involves two-dimensional deformation such as sheet materials, various rolling percentages can be applied.
(sufficient JJ to 110y), the extension theory has not been established, and the pressure 11 setting calculation and control will be further improved in the future.
) is the field of filter rolling technology.

Figure 7 shows a 1-7 stand with an oval hole edge,
The rounded type is passed through the i-stand (+ifi), and the cedar shape is shown. -7 stand T
``Let's get it into the rolling direction'', (b) K shows 11 arrow mark!The indicated pressure 4IL direction dimension H becomes smaller than the radius radius, and at the same time the direction perpendicular to the rolling direction (hereinafter referred to as 11
1 ``I ^ direction and similar)'' method B1-/ is from the diameter,
Lying down, J-stand roll Nl (2llll) with θζ
'si Insertion roller (as shown in cl, 1ci-/rolling direction of stand and I, ;i rolling from the direction perpendicular to
l, this rolling direction dimension 13j is 1-/width dimension Bi/J on the exit side of the stand: rimoke 21ξ, and on the contrary, the width direction dimension H is 1-/Hg rolling direction dimension on the exit side of the stand v7 !
eHi-/, and as a result, it is not possible to obtain a circular cross section. +1"=Change in dimension in f direction♀s LWhat is required is that even if the rolling example in figure
lI11I・11-177-There is 0,'' i) of the mill configuration such as alternately arranging the crescental stand and the bar decal stand: ! 1-fc i, and ji!
Even if the tension control between the stands is done for reasons such as considering the JJ route (the permissible 1j flood in the front seat), (because the tension between the stands is too weak) In reality, there is almost no box-like dimensional control, and the quality is currently inferior to that of board materials.

[Purpose of the invention]

The original J1-Mei (Yo) was edited taking into account the circumstances of the article.

Azusa copper 1 (Yokohama) (In addition to dimensional control in the rolling force direction in 4, dimensional control in the width direction with W is performed at the rolling level, etc.). [II!'j4 (] of the invention): In order to achieve the above object, the present invention, the groove type IK rolling mill according to the invention When all the adjacent soil/stand and stand 1 roll the material to be rolled from the direction of about 11'4, the roll gap of stand 1 and stand 1,
Also, set the ratio of the dimensions in the rolling direction and the width (r) of the pressure abrasive on the exit side of 1 stand, and set the ratio of 1-/stand 1.・”: Detect the rolling load of 1 stand and 11W of these 11W Sadaura 1.・Immediately 1. ``Dimension of one stand person (lIll applied pressure Q applied pressure - + 1 width direction dimension and the width direction dimension of the applied evening material on the exit side of this i stand ÷)''
Q.Shi, is this deviation predetermined? J stand and 1-7 rolling dog 11 (4・fltll f
] 111 Characterized by [Embodiment of issue number 1] Hereafter]・-1 Kyo I'-1 Referring to the drawings, this book) i'+, Ming 1' Central 1- will be explained about the example. do.

Figure 2 shows 1-/stand and 1-stand extracted from the rolling mill group, which are shown as vertical rolls.
− The rolling force I when the IE rolled material / is rolled by the rolling roll R1 − / of the 7 stand, the dimension in the rolling direction of the pressed abrasive material / after rolling, H1 /, and this width. The dimension in the direction is Bi-/, the rolling load when the material to be rolled is rolled by the rolling roll R1 of one stand shown as a horizontal roll is Pi, and the dimension in the rolling direction after rolling is J.
, its width direction dimension is assumed to be ■1.

In addition, the mill constant of i-/stand is M i -/, the mill constant of one stand is Ml, and the set values of the roll gaps of these stands are Sl-/, respectively.
sl is M'/"l, and this roll efficiency is due to the fact that these rolls have holes ii and IJ.
As shown in the figure, set the maximum values of Vζ, roll gear, and 7g.

Assuming this, in the 1-/stand, the well-known gauge meter basic formula is used and 7. ); The relationship of the following equation is established by C.

Further, the following relationship holds true for 5 in one stand.

This is the width direction dimension of the 1st stand on the person's side, and the dimension of the 1ltj mouth j direction of the 1st stand exit 11 is Hl, so the following relationship holds true between these.

T(1=self-/+ΔH1...song・(3) Here, Δ
) It is the amount of expansion in the width direction due to rolling by the II & M1 stand.

At this time, it can be expressed as α, which is the ratio of the width direction dimension H1 on the exit side of one stand and the rolling direction dimension B1. For example, if 1 stand is the most introduced stand and the round bar 14r is obtained, 41 this α is 7
become.

The following equation can be omitted from the above equations ()), (c), (, a), and (g).

The present invention attempts to control the widthwise dimension of a rolled material using this equation (1), and FIG. 9 shows the configuration of a control system that implements this widthwise dimension control.

In the same figure, rolling rolls R1-, 2 of J-Costand are shown.
, the rolling roll R1 of 1 stand represents a horizontal roll, and the rolling roll Ri of 1-/stand in the middle is a horizontal roll.
-/ is a vertical roll and is drawn as a horizontal roll just like Arca's stand for convenience.

Here, 1-/stand Cat, month 911. load detector 2/ that outputs vuR to 4, and roll gear 11. Tsubu i-
, tii, □11 A lowering device 3/ and a lowering device 3/ for specifically controlling this lowering device 3/ are provided, and similarly, one stand is provided with a lowering device 3/ for controlling the pressure 1). 1. l'
, 2 load J11 detectors that detect carts, a roll-down device that adjusts the knobs to R+AI: 3.2, and a roll-down control that specifically controls this downstream device 3.2. Equipment is provided.

In addition, the 1-L and 2 stands have rolling rolls R and 1-2f.
A driving box 7 motor 7θ, a tachometer that detects the speed of this electric motor 7θ, a speed control device p that controls the machine θ in response to signals from a computer IO that operates later. , 9θ are provided, and the 1-/ stand is also similarly provided with an electric motor 7θ, a rotational speed cutter, and a speed control device 9/. An electric technical lawn 72, a rotation speed meter, and nine speed control devices are provided.

Each of the above-mentioned components is directly or indirectly connected to the computer 10, and a setting device for setting the rolling schedule, speed standard, stand opening tension, etc. // is connected to a dimension meter S that measures the dimensions of the rolled material on the outlet side of stand i, and furthermore, the load j of stand 1-7 ((between detector 2/ and total R1 machine/θ) is connected to Delay circuit 6 that guarantees dead time in inverse proportion to 1i - extension speed
is provided.

The operation of the rolling machine id° constructed as described above will be explained below in correspondence with the principle equations (1) to (r).

First, Si-/ and 83- in equation (5) are the set values of the roll gap of -1-/stand and 1 stand, respectively, and 1 due to the settings ', ', ', and 'gt/.
1. g Ir41: Depending on the schedule, total 'n machines/Q
applies a control signal to downstream controllers q/ and gu;
Is this a 1?1iil device? 7 degrees. Also,(!
r) Mi-/ and M-k of the large medium are the mill constants of i-/stand and 1 stand, respectively, and these values are stored in H in advance in the computer/θ.

Furthermore, α in the formula (,11-) is the grooved roll R1-,2
, R1-R4, etc., and a constant determined by the rolling schedule. For example, 1 stand in Fig. 1 is 1
1 hesitation, 4 tans, 7 feet, 59 feet (cedar: lli, V
In the case of a product, rolling direction/J-method B1 and width direction J
Since it can be expected that and are completely equal [7], it should be α-/.

By the way, the subject j1. , 11' / roll output (dimensions, ', l, variation in Fat
Dimensional variation or irregularity of I, and pressure abrasive/7,
It is caused by the phase Jl+S of the Nyoroi-shaped resistance, such as the 1st degree distribution, and in the end, the change in the jL mechanical load l: as a mountain] is possible. Therefore, (in equation 31, F, -KeroΔH
1? t; Please note that the width direction dimension of one stand is U1. Don't be afraid to control, 1
-/Stand and t-do] Stand's sled, I! Leno pressure k
”:ni! [1lil P 1 7 Oyobi P1wo same fR
If you control i, ΔF■1 is set to the specified 111
Control can be shifted to 1.

shi)) 1shide, j, -/rolling cart P1-/ on stand
The town car (detected by H'V, 2/41.,
This detection No. 43 is measured through the delay circuit 2Asahi/θ
Using the formula (1) above, calculate the downstream dimension H1/ on the river side of stand 1-7 with ↑ and Y. Note that the delay circuit 6 guarantees the time required for the part extended by 1-/stand to reach 1 stand.
The actual 121 hair calculation is performed after this dead time, and a)
.

Also, GtJJ machine/θ is ζi'j of this equation (1): ¥
i? -J one and one! ~', according to formula (N), the [J + ri difference Δ■■ between the width direction of 1 stand person side and its output 1i (il width direction, 1- method) is the predetermined α
'# A pure Z) 1 of j stand Louis:; Djjjj 'P 1 (1:(Calculate, this usage load offshore is good
) I-)tlLOYONAIL+'l I'li'll
・Ii: No. i ke i stand's reduction control device 11
/C addition (ro, then this pressure reduction control device j7I''LI,!
is the lowering device, the slide 4 is driven, and the 1 call gap S1 is controlled (iJf is applied, I - / Stan) "+7] -j: Glj;
jjjji-Pi / and one-stand rolling cart P1
At the same time, ΔH1 can be calculated by
Every time I use it, I can do it.

Na:lsu・The above-mentioned crushing death 111ijl f&lI pkoha]] ter'notekofu 1-j-7 of the earth falling down: lj-'' to vj-law 1'i is Ii north kira) t. Therefore, ゛（・）手′〃、1n da 1
As shown in Fig. 11, the i stand's output i11. l
, if −1l &J, then this]-stand law σ
') =I' The above control 1 while starting IA, 4 and 7r
′-,j-M+j can also be +'J' filbet7
(Nari, this.

Due to V, 94 items of precision are produced and further improved, IJ, -, -
/、It is -r゛saru.

In addition, the above 11i111t)il %l is under pressure"1
．． A21/) (The R rate or It mass IJ- also changes, and the rolling speed and stand distance L; 1 and force also change with kneading K f・l);, this 7'L et al. change + l
i! ＋ ＜↓Electricity by speed control system q/ of stand 1-7! 1IiJ machine 7/ is on the elongation side (γil
'i (i, movement (72) are respectively controlled by l device 9β and always set in the setting device //.
4Sl man) -; 1) Continue driving that satisfies 5) JIt's control (11 can be done with conventional technology.

・7o47'C5-1)51-: ',! ': K.J.
For example, (1) formula (-1) formula ('), using the most ftu h" cage meter basic formula, , rolling roll〃・! Even if you use a formula that incorporates one expansion oil stop and wear compensation, etc.! It would be possible to perform almost the same control as lk I, 7'i2'=l 7λ, pressure^recommendation of J1 city! till 1it4
1, jJ Miku 1 "Roll's sales speed IJ'('s 1st time I 1111 between the island cuffs 1tll 1llll
Even if it is %-portion, it is possible to control stand tapping in one way or another, just like in the case of reho.

〔Effect of the invention〕

The above 71...ri, light & (two, obviously/r,
According to the present invention, continuous) 1-rolling 'F' by grooved rolls
-(? Take into consideration pH, V, and l-IA, i!,', 1rjj properties of the stands that touch the corners. Because the control that keeps the ratio constant is 77: 1''
4 products of steel bars and wires with high blueness are I; i'I;
＃'i-ro.

[Brief explanation of the drawing]

Figure 1 shows the condition of a general groove rolling machine.
Figure 3 is an explanatory diagram of the present invention. The schematic diagrams shown in Figures 7 and 7 are for explaining the basic principle of the present invention.1. Figure 1 shows the pressure 4j4 of υ' when carrying out the present invention.
), Pro showing the layering of the Illlli system, V diagram) 7/... Rolled material, 2/ , , , 2.2... A 4s medium detector, 3/ , J, 2 ...Reducing device, g/
, &, 2...pressure-F' ftjl, control device i?
i, -5...Dimension meter, O...Delay circuit, 7θ, V/
, '), 2...174.1jjJ1 machine, δθ, g
/ , g, 2... Rotation speed q (total, 90, 9/,
9...Speed jL needle control device 10...it ita, 7
/, ・, Mll regulator, R1, R17, R4-, 2・
'・Kon Hari Roll

Claims (1)

[Claims] (1) Adjacent 4: A control method for an ITE rolling mill in which each of the adjacent stands is equipped with a groove roll, and the groove rolls of J'L et al. , [? (7)
Roll cap and FTE on the i-stand exit side
<, set the ratio of the dimension in the rolling direction and the dimension in the width direction of the iE material, detect the rolling cart of 1-/stand and 1 stand, and set these set values j? -112 to the detected value
・Width direction of wave pressure abrasive on stand entrance side = -j-
Calculate the (liii difference between the width direction dimension of the overlapping Fk rim of this 1 stand out (1al) and this deviation is ryT5
A control method for a groove type rolling mill in which the E load of one stand 4◇ and 1-/stand is reduced to a value of 1. f, 2) i-/stand roll gap ;; φ constant value S1, mill constant 1"i, 11-, loading) R as r'
l, i Stand roll cap settings (+#, + to S
i, /, Mill constant Mll, pressure)1ξ load P j,
- / and set h1 stand 11 attack 11
Downstream dimension and width of 4 working desks in No. 1 -) direction
Let the ratio of , :, be α. Pressure on the entrance side of one stand 4j; 11・('+'B direction dimension and pressure on the exit side of this one stand 4ip);
,,: fl'l 'j・se(1
Method.