JPH0479726B2 - - Google Patents

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Application Field) The present invention relates to a plurality of rolling mills arranged in tandem and a width of a rolled material between adjacent rolling mills having a plurality of rolls. The present invention relates to a control method and apparatus for a rolling equipment that controls the crown and shape of a rolled material rolled by the rolling equipment that is equipped with a split looper that controls directional tension distribution.

(Prior art) Conventionally, in a plate rolling mill, when controlling the crown and shape of a plate, the roll profile is controlled using a roll bender, or the work roll is shifted, and further the roll profile is controlled using a six-layer rolling mill. Measures such as these have been adopted. When a bender is used, there are problems such as insufficient bender capacity and the relationship between changes in bender load and outlet plate profile is not clear, and when a roll shift or 6-layer rolling mill is used, the number of coils There is a problem in that it is impossible to perform control in response to the constantly changing plate profile during rolling of the material, and the control is limited to presetting before rolling.

Since many of the above problems are based on mechanical limitations, it is difficult to solve them by improving the rolling mill control system. Therefore, it has been impossible to obtain a plate-shaped product with a good plate profile over the entire length of one coil.

Conventionally, it has been assumed that the tension generated between rolling mills arranged in tandem has no distribution in the strip width direction and is a constant value, and this tension value is detected and the tension is adjusted to match the target value. control was in place.
Therefore, it is possible to modify the plate shape to some extent by increasing the target tension value since it is treated as an average tension, but it is necessary to continuously modify the plate crown and plate shape to obtain a good product. It wasn't enough.

(Problems to be Solved by the Invention) There are mechanical limits to controlling the plate crown using existing devices such as benders, and continuous plate crown control over the entire length of the coil is also difficult for the same reason. It was difficult. Furthermore, shape control using average tension and crown control do not take advantage of the effect of the uneven tension distribution pattern that occurs immediately near the roll entry side on the exit side plate profile. The problem was that it could not be obtained for a long time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus for controlling a rolling facility that can produce a product having a good plate profile over the entire length.

[Structure of the invention]

(Means for Solving the Problems) A method for controlling rolling equipment according to the present invention includes N+1 (N≧1) rolling mills RM _i (i=
1,...N) and a rolling mill RM _i-1 with multiple rolls.
Split looper DR _i (i=1,...N) that adjusts the tension distribution in the width direction of the rolled material between (i=1,...N) and the rolling mill RM _i following this rolling mill RM _i-1 . In rolling equipment equipped _with
A first step of setting the entrance plate profile H ^d _i and deformation resistance k _n,i of the rolled material rolled by (i=1,...N), and a rolling mill RM _i (i=1,...N )
a second step of detecting the rolling load and bender load of the second step, and the detected values of this second step and the set value H _i set by the first step;
k _n,i (i=1,...N) and rolling mill RM _i (i=1,...N)
a third step of calculating the rolling crown C _r,i of the rolling roll of the rolling mill RM _i based on the initial roll crown C rp _,i of the rolling roll of the rolling mill RM _i-1 (...N); i=1,...N) and the rolling mill RM _i , a fourth step of detecting the tension distribution ^{t s} _i in the width direction of the rolled material, and a detected value t ^s _i (i
=1,...N) and the calculation result of the third step
Based on C _r,i, the tension distribution pattern ^{t d} _{i (} i=1,...N) near the rolling roll on the entry side of the rolling mill RM i (i=1,...N)
...N), and the rolling mill is calculated based on the sum of the calculation result _t ^di (i=1,...N) of this fifth step and the detected value t ^s _i of the fourth step. RM _i
The sixth step calculates the rolling reduction distribution r ^di in the width direction of the rolled material during rolling, and the _calculation result _{r di} ⁽ i=1,...N) of this sixth step and the first step are calculated. The rolling mill is set based on the set value H ^d _i.
The seventh step calculates the outlet side plate profile h ^d _i of the rolled material rolled by RM _i (i=1,...N) and detects the plate profile h ^d _act of the outlet side rolled material of the rolling mill RM _i . ^The divided ^looper _{DR i} ( _i = 1,...N-1), ^{and calculate this based on the deviation Δh d between} _the calculation result h ^d _N of the seventh step and the detected value h ^d _act of the eighth step. The ninth step calculates each roll position Δt ^s _N of the divided looper DR _N such that the deviation Δh ^d becomes zero.
and a tenth step for controlling the position of each roll of the split looper DR _i based on the calculation result Δt ^s _i (i=1,...N) of the ninth step. The value of the inlet plate profile H ^d _i of _i (i=2,...N) is determined by the first step.
It is characterized in that it is set equal to the value of the calculation result h ^d _i-1 of the step.

The control device for rolling equipment according to the present invention includes N+1 (N≧1) rolling machines RM _i (i=
0,...N) and a rolling mill RM _i-1 with multiple rolls.
Split looper DR _i (i=1,...N) that adjusts the tension distribution in the width direction of the rolled material between (i=1,...N) and the rolling mill RM _i following this rolling mill RM _i-1 . In rolling equipment equipped _with
(i=1,...N) setting means for setting the entrance plate profile H ^d _i and deformation resistance k _n,i of the rolled material rolled by the rolling mill RM _i (i=1,...N); Load detection means for detecting rolling load and bender load
DP _i (i=1,...N), the detected value of this load detection means DP _i , and the set value set by the setting means
Roll crown calculation that calculates the rolling crown C _r,i of the rolling roll of rolling mill RM _i based on H ^d _i , k _{n,i and} the initial roll crown C rp _,i of the rolling roll of rolling mill RM i means RC _i (i=1,...N),
a tension distribution detection means TD _i (i=1,...N) for detecting the tension distribution in the width direction of the rolled material between the rolling mill RM _i -1 (i=1,...N) and the rolling machine RM _i ; Tension distribution that calculates the tension distribution pattern in the vicinity of the roll on the entry side of the rolling mill RM _i based on the detected value of the tension distribution detection means TD _i (i=1,...N) and the output of the roll crown calculation means RC _i Computing means CTD _i (i=1,
...N) and this tension distribution calculation means CTD _i (i=1,
...N) and the detection value of the tension distribution detection means TD _i, a rolling reduction distribution calculating means for calculating the rolling reduction distribution in the width direction of the rolled material being rolled by the rolling mill RM _i
SDR _i (i=1,...N), the output of this rolling reduction distribution calculation means SDR _i (i=1,...N), and the setting value H ^d _i set by the setting means, the rolling mill
Output plate profile calculation means CPO _i for calculating the outlet plate profile h ^d _i of the rolled material rolled by RM _i
(i = 1,...N) and the output h ^d _i of this exit side plate profile calculation means CPO _i (i = 1,...N-1), so that the crown of the exit side plate profile h ^d _i is minimized. Divided looper position calculation means CDR _i (i=1,...N-1) that calculates each roll position of divided looper DR _i
and the deviation Δh between the output h ^d _N of the plate profile detection means for detecting the plate profile of the rolled material on the outlet side of the rolling mill RM _N , the output side plate profile calculation means CPO _N , and the detection value h ^d _act of the plate profile detection means. divided looper position calculation means CDR _N that calculates each roll position of the divided looper DR _N such that this deviation Δh ^d becomes zero based on ^d ;
and divided looper position calculation means CDR _i (i=1,...
Fixed position control means APC _i ( _i =1,...
N), and a rolling mill RM _i (i=2,...N)
The value of the inlet plate profile H ^d _i is set by the setting means to be equal to the value of the output h ^d _i-1 of the outlet plate profile calculation unit CPO _i-1 .

(Principle of the Invention) When rolling a plate, a difference in rolling pressure occurs in the width direction of the plate depending on the initial crown of the roll, the entrance plate profile, and the deformation resistance of the plate during rolling, and this is compounded by the action of the bender. , the roll profile during rolling changes constantly. Depending on this roll profile and the tension distribution in the width direction of the sheet at a position far from the roll entrance side, an uneven tension distribution occurs in the width direction of the sheet immediately adjacent to the roll entrance side. By changing this tension distribution pattern, the pressure distribution during rolling in the width direction of the sheet can be changed, thereby making it possible to continuously control the sheet profile on the exit side.

In order to change the tension distribution pattern immediately adjacent to the roll entry side, the roll profile during rolling is controlled, and the tension distribution in the width direction of the sheet is changed at a position far from the roll entry side, for example, in the longitudinal direction of the roll. By changing the tension distribution pattern using a dividing looper having a roll divided into sections, the tension distribution pattern immediately adjacent to the roll entrance side changes, making it possible to obtain a predetermined exit side plate profile. This will be schematically explained using figures.

FIG. 7 schematically shows the determined tension distribution, etc. when rolling is performed with the roll profile of the rolling mill decremented as shown in FIG. 7a. Normally, when a constant tension is applied between stands using an undivided looper, the tension distribution ^ts in the stationary part between the stands is almost uniform in the width direction as shown in Figure 7b, but during rolling Since the roll profile is on the decrease side as shown in Fig. 7a, the tension distribution in the width direction becomes uneven as shown in Fig. 7c, near the roll on the entry side of the rolling mill, and A considerable deviation occurs at the edge of the plate. This tension distribution pattern t ^d immediately before the roll entry side is influenced by the roll profile C _r , the steady-state tension distribution t ^s , the rolling reduction distribution r ^d in the rolling mill, and the like. Furthermore, the rolling reduction distribution r ^d of the rolling mill also changes depending on this tension distribution pattern t ^d . In this case, as shown in FIG. 7d, the rolling reduction ratio at the center portion is small and the rolling reduction ratio is large at the plate ends. For this reason, an ear wave occurs in the plate shape on the exit side of the rolling mill, as shown in Figure 7e, or even if the shape is flat, the profile ^{h d} on the exit side as shown in Figure 7f. exhibits a convex crown, and in any case it is not possible to obtain a good product with a plate crown.

At this time, if the bender is operated and the roll profile C _r is changed to the increase side, the tension distribution pattern t ^d closest to the roll entry side changes, which changes the rolling reduction distribution r ^d in the rolling mill. It becomes possible to improve the exit plate profile h ^d to some extent. However, if the bender's ability is insufficient, for example, even if the plate shape is improved, the plate crown may not be sufficiently good.

Figure 8 shows the relationship between the crown of the plate and the plate shape (steepness) when combined elongation is not considered. When the convex crown is improved with a bender and the shape reaches the dead zone region, the plate shape may be good but the plate crown may not be completely flat. At this time, if the roll position of the split looper DR is changed so that the tension distribution t ^s between the stands is higher in the center, the tension distribution pattern t ^d closest to the roll entrance side will change, which will cause the rolling mill to The rolling reduction distribution r ^d becomes higher in the central part, and the plate profile h ^d on the exit side is improved. This is schematically shown in FIG. 9a to 9e show the case where each roll position of the divided looper DR is flat as shown in FIG. 9b, that is, the case where no control is performed, and FIGS. As shown in Fig. 9 b1, the case is shown in which the height is controlled to be high in the central part. The tension distribution in the steady part is
By operating as shown in Figure a1, the tension distribution pattern t ^d nearest to the roll entrance side becomes higher at the center as shown in Figure 9 c1, so the rolling reduction distribution
As shown in FIG. 9 d1, r ^d is smaller than in the case where no control is performed at the center. Therefore, the plate thickness distribution h ^d on the exit side is improved as shown in FIGS. 9 e to 9 e 1, and a product with a good plate profile can be obtained.

(Function) In the method for controlling rolling equipment according to the present invention configured as described above, each rolling mill RM _i (i
⁼ 1 _{, .} Note that for the deformation resistance k _n,i , a value estimated and calculated in advance by a computer is used. Then, the rolling load and bender load of the rolling mill RM _i (i=1, . . . N) are detected in a second step. Next, _the detection value of this second step and the set value H ^di ,k _n,i set by the first step
(i=1,...N) and rolling mill RM _i (i=1,...N)
In a third step, the rolling crown C _r,i of the rolling rolls of the rolling mill RM _i is calculated based on the initial roll crown C rp _,i of the rolling rolls N).

On the other hand, rolling mill RM _i-1 (i=1,...N) and rolling mill
The tension distribution t ^s _i in the width direction of the rolled material between RM _i and
It is detected by the following steps. Based on the detected value t ^s _i (i=1,...N) of this fourth step and the third calculation result C _r,i, the rolling rolls on the entry side of the rolling mill RM _i (i=1,...N) are The most recent tension distribution pattern t ^d _i (i
=1,...N) are calculated in the fifth step. The calculation result of this fifth step _t ^di (i=1,
...N) and the detected value t ^s _i of the fourth step are added in the sixth step, and based on this sum, the rolling reduction distribution r in the width direction of the rolled material being rolled by the rolling mill RM _i is further calculated. Find ^d _i . The calculation result of this sixth step r ^d _i
(i=1,...N) and _{the rolling mill RM i} ⁽ _i =
1, . _. . N) is ^calculated in the seventh step.

On the other hand, the plate profile h ^d _act of the rolled material on the outlet side of the rolling mill RM _N is detected in an eighth step. Then, the calculation result _h ^di (i=1,...N
-1), the divided looper ^DR _i (i=1, _...
While calculating each roll position Δt ^s _i of N−1),
Based on the deviation Δh ^d between the calculation result h ^d _N of the seventh step and the detected value h ^d _act of the eighth step, each roll position Δt ^s _N of the divided looper DR _N is determined such that this deviation Δh ^d becomes zero. is calculated in the ninth step. Based on the calculation result Δt ^s _i (i=1, . . . N) in the ninth step, each roll position of the divided looper DR _i is controlled in the tenth step. In addition, rolling mill RM _i (i
= 1,...N), the value of the entrance plate profile H ^d _i is the 7th
is set in the first step so that the calculation result of the step h ^di _-1 is obtained.

As a result, according to the method for controlling a rolling equipment according to the present invention, a product having a good plate profile over the entire length can be obtained.

Also, each rolling mill RM _i (i=1,...N)
Inlet plate profile of rolled material rolled by
H ^d _i and deformation resistance k _n,i are set by a setting means. Note that for the deformation resistance k _n,i , a value estimated and calculated in advance by a computer is used. Rolling mill RM _i (i=
1,...N) are detected by the load detection means DP _i (i=1,...N).
The detected value of this load detection means DP _i (i=1,...N),
and the setting value H ^d _i set by the setting means,
_Roll crown _calculation means _{RC i ( i} =1,...N).

On the other hand, rolling mill RM _i-1 (i=1,...N) and rolling mill
The tension distribution in the width direction of the rolled material between it and RM _i is detected by tension distribution detection means TD _i (i=1,...N). This tension distribution detection means TD _i (i=1,...N)
_The tension distribution calculation means CTD _i ( _i
=1,...N). Then, the output of the tension distribution calculation means CTD _i (i=1,...N) and the detected value of the tension distribution detection means TD _i are added by the rolling reduction distribution calculation means SDR _i (i=1, ...N). , Based on this sum, the rolling reduction distribution in the width direction of the rolled material being rolled by the rolling mill RM _i (i=1, . . . N) is further calculated. This rolling reduction distribution calculation means SDR _i (i=1,...
Output ^side plate _profile calculation ^means CPO _{i ( i} =1,...N). And this outlet plate profile calculation means CPO _i
Based on the output h ^d _i of (i=1,...N-1) _, each roll position of the split looper _{DR i} ^is determined by the split looper position calculation means CDR _i (i =1,...N-1). Further, the plate profile of the rolled material on the outlet side of the rolling mill RM _N is detected by the plate profile detection means.
Based on the deviation Δh d between the output h ^d _N of the exit plate profile calculation means CPO _N and the detected value h ^d _act of the plate profile detection means, a dividing looper is provided so that this deviation ^{Δh d becomes} zero.
Looper position calculation means that divides each roll position of DR _N
Calculate by CDR _N. Then, each roll position of the divided looper DR _i is controlled by the fixed position control means APC _i (i=1,...N) based on the output of the divided looper position calculation means CDR _i (i=1,...N). . In addition, the value of the inlet plate profile H ^d _i of the rolling mill RM _i (i=2,...N) is determined by the outlet plate profile calculation means CPO _i-1
The setting means sets the value of the output h ^d _i-1 .

As a result, according to the control device for a rolling equipment according to the present invention, a product having a good plate profile over the entire length can be obtained.

(Embodiment) FIG. 1 shows in block form the configuration of a first embodiment of a control device for a rolling facility according to the present invention. In this embodiment, the present invention is applied to a rolling equipment having two rolling mills (N=1) RM _{0 and} RM ₁ and a split looper DR. The control device of this embodiment includes a load detector DP, an amplifier PAMP, a roll crown calculator RC, a tension distribution detector TD, and an amplifier TAMP.
, a plate profile detector 2, an amplifier 3, a calculator 4, a tension distribution calculator CTD, a rolling reduction distribution calculator SDR, an exit plate profile calculator CPO,
Split looper position calculator CDR and fixed position control device
Equipped with APC.

The tension distribution of the rolled material 1 rolled by the rolling mill RM ₀ in the width direction is adjusted by the dividing looper DR, and then sent to the rolling mill RM ₁ . At this time, the tension distribution ^ts in the width direction of the rolled material 1 adjusted by the split looper DR is detected by the tension distribution detector TD,
This detection signal is amplified by an amplifier TAMP.

On the other hand, the rolling load P and bender load P _B of the rolling mill RM ₁ are detected by the load detector DP, and this detection signal is amplified by the amplifier PAMP. Further, the entrance plate profile H ^d and average deformation resistance k _n of the rolled material 1 rolled by the rolling mill RM ₁ and the initial roll crown C _rp of the rolling rolls of the rolling mill RM ₁ are stored in the computer 4. and,
The entrance plate profile H ^d , the average deformation resistance k _n , and the initial roll crown C _rp stored in the computer 4,
and the rolling mill RM ₁ based on the detected values P and P _B of the load detector DP amplified by the amplifier PAMP.
The roll crown C _r of the rolling roll during rolling is calculated by a roll crown calculator RC. next,
Based on the roll crown C _r calculated by the roll crown calculator RC and the detection value t ^s of the tension distribution detector TD amplified by the amplifier TAMP, the nearest rolling roll on the entry side of the rolling mill RM ₁ is calculated. A tension distribution pattern ^td is calculated by a tension distribution calculation unit CTD. And this tension distribution calculator CTD
The output t ^d and the tension distribution t ^s amplified by the amplifier TAMP are added by the rolling reduction distribution calculator SDR, and based on this sum t ^dl , the width of the rolled material during rolling by rolling mill RM ₁ is calculated. The rolling reduction distribution r ^d in the direction is calculated by the rolling reduction distribution calculator SDR. The rolling material is rolled by the rolling mill RM ₁ based on the output r ^d of this rolling reduction distribution calculator SDR and the entrance plate profile H ^d of the rolled material 1 to be rolled by the rolling mill RM ₁ stored in the computer. The exit side plate profile ^hd of material 1 is calculated by the exit side plate profile calculator CPO. A looper position calculator divides the deviation Δh d between the output h ^d of the output plate profile calculator ^CPO and the detection value h ^d _act of the plate profile detector 2 amplified by the amplifier 3.
Calculations are made based on CDR, and each roll position Δt ^s of the divided looper DR is calculated such that this deviation Δh ^d becomes zero. Then, based on each roll position Δt ^s, the fixed position controller APC controls the divided looper DR.
Each role is controlled.

As a result, according to this embodiment, a product having a good plate profile over the entire length can be obtained.

In addition, the control of the exit side plate profile h ^d of the rolling mill RM ₁ using the split looper DR can be used, for example, even when a plate with a good shape is obtained by the bender, the crown control of the plate with the remaining plate crown can be controlled by the bender. Since this can be performed without using the control end as the operating end, there is also the effect that crown control can be performed without deteriorating the shape. Furthermore, by increasing the number of roll divisions in the width direction of the divided looper DR to five or more, it is possible to finely control the deterioration of the shape due to compound elongation that cannot be removed by bender operations. For example, it is said that quarter elongation is mainly caused by the reduction ratio at the crown end of the thermal crown being larger than that at the center. This is schematically shown in FIG. 2. Fig. 2a shows the shape of the thermal crown 19 when there is no roll deflection, Fig. 2b shows the roll profile when the roll is deflected during rolling of the plate, and Fig. 2c shows the result. This shows the appearance of quarter elongation that occurs on the exit side plate. In order to control this using a 5-divided looper roll, the tension t in the steady section between the stands must be adjusted so that the rolling reduction in the quarter section is smaller than that in the center and end sections, as shown in Figure 3. Just operate ^s . Figure 3a shows the tension distribution ^ts generated in the stationary area between rolling mills when the position of the 5-divided looper is adjusted to be higher in the center and lower in the quarters as shown in Figure 3b. . At this time, the rolling machine RM ₁
The tension distribution pattern t ^dl on the inlet side of is such that the change in tension in the width direction becomes small as shown in FIG. 3c. Therefore, the rolling reduction distribution during rolling of rolling mill RM ₁ r ^d
As shown in FIG. 3d, when the control is performed, the rolling reduction ratio in the quarter portion becomes lower and the rolling reduction ratio in the center portion becomes higher than in the case without the control.
If the rolling reduction distribution r ^d obtained under control is obtained, the shape will not deteriorate due to quarter elongation as shown in FIG. 2c, and a product with a good plate shape can be obtained.

FIG. 4 shows, in block form, the configuration of a second embodiment of the control device for rolling equipment according to the present invention. In this embodiment, N+1 (N≧2) rolling mills RM _i (i=0,...
N) and a rolling mill RM _i-1 (i=
1,...N) and the rolling mill subsequent to this rolling mill RM _i-1
The present invention is applied to a rolling equipment having a split looper DR _i (i=1,...N) for adjusting the tension distribution in the width direction of the rolled material between the RM _i and the rolled material.

The control device of this embodiment has a load detector DP _i (i=1,
...N), amplifier PAMP _i (i=1, ...N), roll crown calculator RC _i (i=1, ...N), tension distribution detector TD _i (i=1, ...N), amplifier
TAMP _i (i=1,...N), plate profile detector 2 (not shown), amplifier 3 (not shown), calculator 4, and tension distribution calculator CTD _i (i=
1,...N) and a rolling reduction distribution calculator SDR _i (i=1,
...N) and exit plate profile calculator CPO _i (i=
1,...N), and a divided looper position calculator CDR _i (i=
1,...N) and a fixed position control device APC _i (i=1,...
N).

The rolled material 1 rolled by the rolling mill RM _i-1 (i=1, . . . N) has its tension distribution in the width direction adjusted by the dividing looper DR _i , and is sent to the rolling mill RM _i .
At this time, the tension distribution detector TD _i in the width direction of the rolled material 1 adjusted by the split looper DR _i detects the tension distribution, and this detection signal is amplified by the amplifier TAMP _i .

On the other hand, the rolling load _{P i and} the bender load P _B,i of the rolling mill RM i are detected by the load detector DP _i , and this detection signal is amplified by the amplifier PAMP _i . In addition, the entrance plate profile H ^d _i of the rolled material 1 rolled by the rolling mill RM _i , the average deformation resistance k _n,i, and the initial roll crown of the rolling roll of the rolling mill RM _i
C _rp,i is stored in the computer 4. Note that the value of the inlet plate profile H ^d _i is set to be equal to the value of the calculation output h ^d _i-1 of the outlet plate profile calculator CPO _i-1, which will be described later. Then, the entrance plate profile H _i , the average deformation resistance k _n,i and the initial roll crown C _rp,i stored in the computer 4, and the detected value P _i of the load detector DP _i amplified by the amplifier PAMP _i , P _B,i
The roll crown C _r,i of the rolling roll of the rolling mill RM _i during rolling is calculated by the roll crown calculating unit RC _i based on . Next, this roll crown calculator
Based on the roll crown C _r,i calculated by RC _i and the detected value t ^s _i of the tension distribution detector TD _i amplified by the amplifier _{TAMP i ,} The tension distribution pattern t ^d _i of is calculated by the tension distribution calculation unit CTD _i . Then, the output t ^d _i of the tension distribution calculator CTD _i and the tension distribution t ^s _i amplified by the amplifier TAMP _i are calculated by the reduction rate distribution calculator
SDR _i , and based on this sum t ^dl _i , the rolling reduction distribution r ^d _i in the width direction of the rolled material being rolled by the rolling mill RM _i is calculated by the rolling reduction distribution calculator SDR _i . . Based on the output r ^d _i of this rolling reduction distribution calculator SDR _i and the entrance plate profile H ^d _i of the rolled material 1 to be rolled by the rolling machine RM _i stored in the computer, the rolling process is performed by the rolling machine RM _i . The outlet plate profile h ^d _i of the rolled material 1 to be rolled is calculated by the outlet plate profile calculator CPO _i . Based on the output h ^d _i of the exit plate profile calculator CPO _i (i=1,...N-1), each roll of the split looper DR _i is determined such that the crown of the exit plate profile h ^d _i is minimized. The position Δt ^s _i is calculated by a divided looper position calculation unit CDR _i (i=1, . . . N−1).

On the other hand, the plate profile h ^d _act of the rolled material on the outlet side of the rolling mill RM _N (not shown) is detected by the plate profile detector 2 (not shown), and this detection signal is sent to the amplifier 3.
(not shown). Then, as shown in Fig. 1, the exit plate profile calculator CPO _N
The deviation Δh d between the output h ^d _N (not shown) and ^the detected value h ^d _act of the plate profile detector 2 is divided into a looper position calculator.
CDR _N (not shown), and further calculates the roll position Δt ^s _N of the divided looper DR _N (not shown) such that this deviation Δh ^d becomes zero. Next, each roll of the divided looper DR _i is controlled by the fixed position control device APC _i based on the output Δt ^s _i of the divided looper position calculator CDR _i (i=1, . . . N).

As a result, according to this embodiment, a product having a good plate profile over the entire length can be obtained.

In the examples described so far, the plate profile h ^d at the exit side of the rolling mill was estimated based on the detected values of the rolling load, bender load, and tension distribution, but instead of this estimated value h ^d , it was estimated by the setting means. The same control can be performed using _the plate profile target value h ^dain that has been set accordingly. An example of a control device in this case is shown in FIG. A plate profile h ^d _act of the rolled material 1 on the outlet side of the rolling mill RM is detected by a plate profile detector 2, and this detection signal h ^d _act is amplified by an amplifier 3. Then, the deviation Δh d between the plate profile target value h ^d _ain stored in the calculator 4 and the detection value h ^d _act of the plate profile detector 2 amplified by the amplifier ³ is calculated by the divided looper position calculator CDR. Then, the roll position Δt ^s of the divided looper DR such that this deviation Δh ^d becomes zero is calculated. Each roll of the split looper is controlled by the fixed position control device based on the calculated roll position Δt ^s .

For reference, the external appearance of the split looper is shown in FIG. Figure 6a shows a hydraulic split looper for shaping and
Front view of what is called an actimeter, Figure 6b
is a conceptual diagram of a five-divided electric split looper. 6th
In FIG. b, each of the divided looper roll shafts 52 can be individually controlled in position by being connected to a motor (not shown) or by a combination of gears and clutches.

〔Effect of the invention〕

According to the present invention, by appropriately controlling the distribution of tension acting on a rolled material between rolling mills, a product having a good plate profile over the entire length can be obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a first embodiment of the control device for rolling equipment according to the present invention, and FIGS.
c is a schematic diagram showing the cause of quarter elongation, Fig. 3 is a conceptual diagram showing a method for improving quarter elongation, and Fig. 4 shows the configuration of a second embodiment of the control device for rolling equipment according to the present invention. 5 is a block diagram showing a control device that controls the shape of the rolled material based on the deviation between the target value and the detected value of the plate profile of the rolled material exiting the rolling mill, and FIGS. 6a to 6b are the block diagrams. Figures 7a to 7f are diagrams showing the external appearance of the split looper; and Figures 7a to 7f are conceptual diagrams showing the relationship among the tension distribution, rolling reduction distribution, and outlet plate profile at each position in the width direction of the rolled material when the rolling roll profile is decrease. Figure 8 is a schematic diagram showing the crown and shape in the absence of compound elongation and the presence of a shape dead zone. Figure 9 is a conceptual diagram showing that the exit side plate profile is improved when the position of each roll of the split looper is changed. It is. 1...Rolled material, 2...Plate profile detector, 3
...Amplifier, 4...Computer, RM _i (i=1,...N)
...Rolling mill, DP _i (i=1,...N) ...Load detector, PAMP _i ...Amplifier, RC _i ...Roll crown calculator, CTD _i ...Tension distribution calculator, DR _i ...Division Looper, TD _i ...Tension distribution detector, TAMP _i ...
...Amplifier, SDR _i ...Reduction rate distribution calculator, CPO _i ...
...Exit plate profile calculator, CDR _i ...Divided looper position calculator, APC _i ...Fixed position control device.

Claims (1)

[Claims] 1. The rolling mill RM i-1 (i=1) having N+1 (N _≧ 1) rolling mills RM _i (i=0,...N) arranged in tandem and a plurality of rolls. ,... _N ) and a split looper _{DR i} (i=
1,...N), the entrance plate profile H ^d _i and deformation resistance k n, of the rolled material rolled by each of the rolling mills RM _i (i=1,...N) _{, i,} a second step of detecting the rolling load and bender load of the rolling mill RM _i (i=1,...N), and a detection value of this second step and the first The setting values H ^d _i , k _n,i (i=1,
...N) and the roll crown during rolling of the rolling roll of rolling mill RM _i based on the initial roll crown C _{rp,i of} the rolling roll of rolling mill RM i (i=1,...N)
A third step of calculating C _r,i and the rolling mill
A fourth step of detecting the tension distribution ^{t s} _i in the width direction of the rolled material between RM _i-1 (i=1,...N) and the rolling mill RM _i , and the detected value t of this fourth step. ^s _i (i=1,
...N) and the calculation result of the third step C _r,i
Based on the tension distribution pattern t ^d _i (i ₌
1,...N), and based on the sum of the calculation result _t ^di (i=1,...N) of this fifth step and the detected value t ^s _i of the fourth step. a sixth step of calculating the rolling reduction distribution r ^d _i in the width direction of the rolled material during rolling by the rolling mill RM _i , and the calculation result of this sixth step r ^d _i (i=1,...N) and the set value H ^d _i set in the first step.
a seventh step of calculating the outlet plate profile h ^d _i of the rolled material rolled by the rolling mill RM _i (i=1,...N) based on the rolling mill RM i (i=1,... _N ); an eighth step ^of detecting the plate profile h ^d _{act of}
= 1,...N-1), the exit plate profile h ^d _i
The divided looper is such that the crown of
Calculate each roll position Δt ^s _i of DR _i (i=1,...N-1), and calculate the calculation result of the seventh step.
A ninth step of calculating each roll position Δt ^s _N of the divided looper DR _N such that this deviation Δh ^d becomes zero based on the deviation Δh ^d between h ^{d N and the detected value h d} _act ^of _the eighth step. and the calculation result Δt ^s _i (i=1,...N) of the ninth step.
a tenth step for controlling the position _{of each roll of the rolling mill RM i (} i=2,...N).
A control of a rolling equipment characterized in that the value of the entry side plate profile H ^d _i is set by the first step to be equal to the value of the calculation result h ^d _i-1 of the seventh step. Method. 2 N+1 (N≧1) rolling mills RM _i (i=0,...N) arranged in tandem, and the rolling mill RM _i-1 (i=1,...N) having a plurality of rolls. Split looper _{DR i} ( _i
= 1,...N),
a setting means for setting the entrance plate profile H ^d _i and deformation resistance k _n,i of the rolled material rolled by each of the rolling mills RM _i (i=1,...N) _; Load detection means DP _i (i=1,...N) for detecting the rolling load and bender load
...N), the detected value of this load detection means DP _i , and the setting value H ^d _i ,k _n,i set by the setting means
and _roll crown calculation means _{RC i ( i =} 1, ... _N ) and tension distribution detection means _{TD i (} i=1 ,...N), the detected value of this tension distribution detection means TD _i (i=1,...N), and the output of the roll crown calculation means RC _i , the nearest rolling roll on the entry side of the rolling mill RM _i is determined. Tension distribution calculation means CTD _i (i
= 1,...N) and this tension distribution calculation means CTD _i (i
= 1,...N) and the tension distribution detection means TD _i
rolling reduction distribution calculating means SDR _i (i=1,...N) for calculating the rolling reduction distribution in the width direction of the rolled material being rolled by the rolling mill RM _i based on the sum of the detected values of The output of the distribution calculation means SDR _i (i=1,...N) and the setting value H ^d _i set by the setting means
an exit side plate profile calculation means CPO _i (i=1,...N) for calculating an exit side plate profile h ^d _i of the rolled material rolled by the rolling mill RM _i based on the above-mentioned rolling mill RM i; _i (i=1,...N-
1) split looper position calculation means for calculating each roll position of the split looper _{DR i such that the crown of the outlet plate profile h d i} ^{is minimized} based on the output h d _i of 1);
CDR _i (i=1,...N-1) and the rolling mill RM _N
plate profile detection means for detecting a plate profile of the outlet side rolled material; and said outlet side plate profile calculation means.
Based on the deviation Δh ^d between the output h ^d _N of the CPO _N and the detection value h ^d _act of the board profile detection means, the division calculates each roll position of the divided looper DR _N such that this deviation Δh ^d becomes zero. Looper position calculation means CDR _N and the divided looper position calculation means CDR _i (i=1,...N)
Fixed position control means _{APC i (} i=1,...
N), and the rolling mill RM _i (i=2,
...N) is _set by the ^setting means to the exit side plate profile calculation means.
A control device for a rolling equipment, characterized in that it is set to be equal to the value of the output h ^d _i-1 of CPO _i-1 .