JPH0399722A - Controller for straightening machine - Google Patents

Abstract

PURPOSE:To obtain the controller with high reliability for the straightening machine by deciding whether correction of the gap of the 1st main roll is required of not and outputting the position deviation data based on the decision result as the signal for correcting the position of gap to the gap position controlling means of the 1st main roll. CONSTITUTION:The warpage of the material to be corrected 1 is corrected with the 1st or the 3rd main rolls 3a-3b. And the decision whether correction of the gap of the 1st main roll 3a is required or not is executed by taking out the position deviation data equivalent to the distance between the provided position of the warpage position detecting means and the position of the 1st main roll 3a from the storage part in the data-register means 17. The position deviation data based on the decision result is outputted as the gap position correcting signal to the gap position controlling means of the 1st main roll 3a. Therefore, no matter how the bending shape of the material to be corrected is, the correction of the roll gap is automatically executed and the correcting effect is improved.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) The present invention corrects warpage in the longitudinal direction of straightened materials (H-shaped steel and various shaped steel) rolled in a shaped steel rolling equipment. The present invention relates to a control device for a straightening machine.

(Prior Art) Conventionally, shape steel rolling equipment has been equipped with a straightening machine that corrects warpage in the longitudinal direction of rolled materials to be straightened (H-shaped steel and various shaped steel).

FIG. 4 is a schematic diagram showing a partial configuration example of this type of straightening machine equipment mechanism. In FIG. 4, a material to be straightened (H-shaped steel and various shaped steel) 1 that has been rolled in a shaped steel rolling equipment (not shown) and has reached a temperature close to room temperature through a cooling process is conveyed by a conveying table 2 and progresses. It looks like this.

Further, along the traveling direction of the material to be straightened 1, a first main roll 3 a is placed on the upper side, a second main roll 3 b is placed on the lower side, and a third main roll 3 c is placed on the upper side in order as shown in the figure. (Only three main rolls are shown in the figure, and the others are omitted). Furthermore, the first. Second. each third main roll 3a;
3b, 3c have their main roll electric m4a, 4b, 4c
, gear adjustment mechanism 5a.

5b, 5c and gap electric motors 6a, 6b, 6c are respectively attached, and these constitute a straightening machine.

With this straightening machine, the warpage in the longitudinal direction of the material to be straightened 1 which mainly occurs during the cooling process after rolling can be straightened by the first straightening machine.
．． Second. The roll gap adjustment for each of the third main rolls 3a, 3b, and 3c is set in advance.

However, in such a straightening machine equipment mechanism,
Since the roll gaps between the main rolls 3a, 3b, and 3c are fixed, insufficient correction occurs depending on the degree of bending of the material 1 to be corrected. Therefore, in the above-described straightening method, since the roll gap position adjustment for each rolling schedule is rough, the straightening effect will vary due to the difference in the warping characteristics of the straightened material 1 for each roll.

(Problems to be Solved by the Invention) As described above, in the past, there has been a problem in that the straightening effect varies due to differences in the curved shape of the material to be straightened.

An object of the present invention is to provide a highly reliable control device for a straightening machine that can automatically correct the roll gap and improve the straightening effect regardless of the curved shape of the material to be straightened.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides first straightening rollers arranged in order along the traveling direction of the material to be straightened rolled in the section steel rolling equipment. In a control device for a straightening machine that corrects warpage in the longitudinal direction of a material to be straightened, the control device is composed of the first to third main rolls and a gap adjustment mechanism for these.
a biting detection means for detecting biting in the main roll of the straightening material; a warping position detection means installed in a direction perpendicular to the traveling direction of the material to be straightened and detecting the position of the lower part of the flange of the material to be straightened; speed detection means for detecting the straightening speed of the material to be straightened from the main roll of with distance as a constant,
a sampling time calculation means that determines the sampling time per data based on the distance per data and the straightening speed from the speed detection means; and a sampling time calculation means based on the bite detection signal from the bite detection means. a counting means for counting the sampling time output value from the counting means and outputting a count-up signal; and a data storage for storing the flange lower position of the material to be straightened detected by the warp position detecting means as data based on the count-up signal from the counting means. means, deviation calculation means for calculating a positional deviation between the position data of the data storage means and the reference position, and a plurality of storage units corresponding to the distance between the installation position of the warp position detection means and the first main roll position. data register means for sequentially storing positional deviation data from the deviation calculating means each time a count-up signal from the counting means is input, and sequentially shifting previously stored positional deviation data; and a warping position detecting means. Determine whether or not to correct the gap of the second main roll by retrieving position deviation data from a storage section in the data register means corresponding to the distance from the installation position of the second main roll position 1731, and make the determination. Corresponding to the distance between the first comparison means which outputs the position deviation pig as a gap position correction signal to the gap position control means of the second main roll according to the result, and the installation position of the warp position detection means and the first main roll position. The position deviation data is extracted from the storage section in the data register means to determine whether or not to correct the gap of the first main roll, and based on the determination result, the position deviation data is used as a gap position correction signal to be output to the first main roll. and second comparison means for outputting to the roll gap position control means.

(Function) Therefore, in the control device for the straightening machine of the present invention, before the grain to be straightened is bitten by the first main roll, the straightening speed of the first main roll is detected in advance by the speed detection means, and The distance per data is determined by the distance between the installation position of the warp position detection means installed perpendicular to the direction of movement of the straightening material and the first main roll position, and the corresponding number of multiple position data of the butt register means. It is calculated in advance by a sampling time calculation means that determines the sampling time per data piece based on the distance per data piece and the correction speed.

Next, when the tip of the straightening grinder is bitten by the first main roll, a biting detection signal is emitted from the biting detection means and inputted to the counting means, and at this timing, the counting means starts counting. , when the sampling time value is reached, a count-up signal is output, and at that timing, the flange lower position of the sheet to be straightened detected by the warp position detection means is stored in the data storage means. Then, a position deviation is calculated from the stored position data and the reference position by the deviation calculating means, and the position deviation data from the deviation calculating means is stored in the data register means at the same time as the count-up signal from the counting means. , and all the plurality of position deviation data already stored in the data register means are sequentially shifted.

Next, position deviation data corresponding to the distance between the installation position of the warp position detection means and the second main roll position is inputted from the storage section in the data register means to the first comparison means, and here A determination is made as to whether or not to correct the gap between the rolls, and position deviation data based on the determination result is output as a gap position correction signal to the gap position control means of the second main roll. The warpage of the object 4 to be corrected is corrected by changing the gap between the two.

At the same time, a position deviation value corresponding to the distance between the installation position of the warp position detection means and the first main roll position is input from the storage section in the data register means to the second comparison means. A determination is made as to whether or not to correct the gap of the first main roll. Based on the determination result, positional deviation data is output as a gap position correction signal to the gap position control means of the first main roll. The warpage of the grindstone to be straightened is corrected by changing the gap between the main rolls.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing a partial configuration example of a straightening machine equipment mechanism to which the present invention is applied, and the same elements as those in FIG. 4 are designated with the same reference numerals. In FIG. 1, a material to be straightened (H-shaped steel and various shaped steels) 1 that has been rolled in a shaped steel rolling facility (not shown) and has been brought to near normal temperature through a cooling process is as follows:
It is conveyed and advanced by a conveyance table 2 composed of wide rollers. Further, along the traveling direction of the material to be straightened 1, a first main roll 3a is provided on the upper side.

A second main roll 3b is arranged on the lower side, and a third main roll 3c is arranged on the upper side in order as shown in the figure (only three main rolls are shown in the figure, and the others are omitted). . Furthermore, the first. Mj2. Each of the third main rolls 3a, 3b, 3c includes:
Main roll electric motors 4a, 4b, 4c that drive it, and each main roll 3a.

Gap adjustment mechanism 1 for adjusting the gap between gaps 3b and 3c Mechanisms 5a, 5b, and 5c and gap motors 6a, 6b, and 6c that drive them are respectively attached, and these constitute a straightening machine. The straightening machine is used to straighten warpage in the longitudinal direction of the straightened material 1, which mainly occurs during the cooling process after rolling.

On the other hand, the first. Each of the second main rolls 3a, 3b includes a gap position detector 7a for detecting the roll gap position;
7b are installed respectively. In addition, the first main roll 3
Attached to a is a load cell 8 which is a biting detection means that detects that the material to be straightened 1- is bitten by the first main roll 3a and generates a biting detection signal. Further, on the downstream side of the third main roll 3c, the material to be straightened 1 is placed in a direction perpendicular to the traveling direction of the material to be straightened. Second. An image sensor 9 is installed as a warp position detection means for detecting the position of the lower flange of the material to be straightened by brightness and darkness while passing through the third main rolls 3a, 3b, and 3c. Furthermore, an image sensor is provided at a position facing the image sensor 9.
A light projector 10 is provided to make the position detection at each position clearer.

Next, FIG. 2 shows the first part of the straightening machine equipment mechanism. It is a block diagram which shows the example of a structure of the control apparatus which controls the roll gap of each 2nd main roll 3a, 3b.

Control device of this embodiment] 1 is a speed detection unit 1 as shown in the figure.
2, a sampling time calculator 13, a counter 14 as a counting means, a data memory 15 as a data storage means, a deviation calculator 16, a data register 17,
It is configured to include a first comparison circuit 18 and a second comparison circuit 19.

Here, the speed detection section 12 detects the straightening speed v3 of the material to be straightened 1 from the first main roll 3a. Also,
The sampling time calculator 13 calculates the distance ρ per data from a fixed number of multiple position data corresponding to the distance ρ1 from the installation position of the image sensor 9 to the position of the first main roll 3a. as a constant, and the distance jll per data
Based on o and the correction speed v3 from the speed detection section 12, a sampling time t5 per data is determined. Further, the counter 14 counts up the sampling time output value t5 from the sampling time calculator 13 by 1 based on the jamming detection signal from the load cell 8, and outputs a count-up signal.

On the other hand, the data memory 15 stores the flange lower position HL of the material to be straightened detected by the image sensor 9 based on the count-up signal from the counter 4 as data. Further, the deviation calculator 16 uses the position data in the data memory 15 and the reference position (image sensor).
The deviation Δh of the flange lower position of the material 1 to be straightened during straightening is calculated from the distance from the lowest detection position of 9 to the upper surface of the conveying table 2) and ho. Further, the data register 17 has a plurality of storage units corresponding to the distance ρ1 between the installation position of the image sensor 9 and the position of the first main roll 3a, and stores the position deviation data from the deviation calculator 16 from the counter 14. Each time a count-up signal is input, it is sequentially stored, and all the previously stored position deviation data are sequentially shifted. Further, the first comparison circuit 18 is connected to the second comparison circuit from the installation position of the image sensor 9.
The positional deviation data corresponding to the distance Ω2 between the positions of the second main rolls 3b is extracted from the storage section in the data register 17, and it is determined whether or not to correct the gap of the second main roll 3b. The deviation data is output as a gap position correction signal to a gap position controller (not shown) of the second main roll 3b. Furthermore, the second comparison circuit 19 retrieves position deviation data from the storage section in the data register 17 corresponding to the distance ρ between the installation position of the image sensor 9 and the first main roll 3a position, It is determined whether or not to correct the gap of the main roll 3a, and based on the result of this determination, positional deviation data is output as a gap position correction signal to a gap position controller (not shown) of the first main roll 3a.

Next, the operation of the control device for the straightening machine constructed as described above will be explained.

In FIGS. 1 and 2, the material 1 to be straightened is transported by the transport table 25, and before the material 1 to be straightened is bitten by the first main roll 3a, the material 1 to be straightened is transported by the first main roll 3a. Second. The third main rolls 3a, 3b, and 3c have the same roll gap as the conventional one, and the other main rolls (not shown) are adjusted close to the pass line of the material 1 to be straightened.

On the other hand, the straightening speed v3 of the first main roll 3a is detected by the speed detection unit 12, and the first
The distance Ω between the positions of the main roll 3a, and the corresponding number of multiple position data in the data register 17, the distance Ω per data.

has as a constant, and the distance Ω per data. Using the correction speed v3 and the correction speed v3, the sampling time calculator 13 calculates the sampling time t5 per data by the following calculation.

ts-v3/, 1llo (ms) The above calculation results are set in the counter 14 in advance.

Next, in such a state, when the tip of the material to be straightened 1 is bitten by the first main roll 3a, a biting detection signal is generated from the imager 9 and inputted to the counter 14. Due to this timing, counter 14
Karan!・ is started, and this count value is the sampling time value t calculated by the sampling time calculator 13,
When the count-up signal is reached, a count-up signal is output to the data memory 15. With this timing, the image sensor
At step 9, the warped state (bent state) of the trA' 1 to be corrected at that time, that is, the flange lower position H, is detected, and this is temporarily stored in the data memory 15.

FIG. 3 is a diagram showing how the position of the lower part of the flange of the material to be straightened 1 is detected. In FIG. 3, it is shown that the material to be straightened 1 is curved upward, and the position detection range of the image sensor 9 corresponds to the height of the projector 10, and within this range, the material to be straightened is
When passing, the flange lower position HL is detected based on the brightness of the projector 10. Also, a reference position h, which is the distance from the lowest position of the projector 10 to the upper surface of the transport table 2, is
o is a fixed value.

Next, the position data HL stored in the data memory 15 in this manner and the reference position are stored. The positional deviation Δh is calculated by the deviation calculator 6 using the following calculation.

Δh+ =ho H+, (mm) The above calculation result is stored in the data register 1.7 simultaneously with the timing of the count-up signal from the counter 14, and is stored in the data register 17 at the timing of the next count-up signal. The deviation data already stored in the first storage section is shifted to the next storage section, and the new calculation result from the deviation calculator 16 is stored in the first storage section. The above operations are repeated until the material to be straightened passes through the first main roll 3a.

Next, a data register 1 corresponding to the distance g2 between the installation position of the image sensor 9 and the second main roll 3b position is registered.
The positional deviation data Δh is inputted from the storage unit Δhm in 7 to the first comparator circuit 18, where it is determined whether or not to correct the gap of the second main roll 3b in the upward direction. Based on] 8.

If it is determined that Δh is 0 as a result of the above determination, it is determined that the warp of the material to be straightened is directed downward, and this positional deviation of 661 minutes is shown as a gap position correction signal. It is output to the gap position controller of the second main roll 3b that does not move. Thereby, the gap between the second main rolls 3b is changed, and the downward warp of the material to be straightened 1 is corrected.

Note that if it is determined that Δh is not <Q, the gap correction of the second main roll 3b is not performed.

In addition, at the same timing as the gap correction of the second main roll 3b, a position corresponding to the distance Ω between the installation position of the image sensor 9 and the position of the first main roll 3a is determined from the storage section Δhn in the data register 17. Deviation data Δh
is input to the second comparison circuit] 9, where it is determined whether or not to correct the gap of the first main roll 3a in the downward direction based on the following equation.

9 As a result of the above determination, if it is determined that Δh l>O, it is determined that the warp of the material to be straightened 1 is upward, and this position deviation of 661 minutes or the gap position correction signal is This is output to a gap position controller of the first main roll 3a (not shown). Thereby, the gap between the first main rolls 3a is changed, and the upward warpage of the material to be straightened 1 is corrected.

Note that if it is determined that Δh,>Q is not satisfied, the gap correction of the first main roll 3a is not performed.

As described above, the control device for the straightening machine of this embodiment includes the image sensor 9 installed on the entry side of the straightening machine equipment mechanism at a position perpendicular to the traveling direction of the material to be straightened 1, and the image sensor 9 A floodlight 10 is installed at a position facing 9,
The image sensor 9 detects the flange lower position HL, which is the warped position of the material to be straightened 1, every count-up signal from the counter] 4, and detects this flange lower position H1 and the reference position (fixed distance between the upper surface of the transport table 2). ) The positional deviation Δh1 from 0 is calculated by the deviation calculator 16, and this positional deviation data is stored in the first storage part in the data register 17, and the previously stored positional deviation data is calculated for each count-up signal. The data Δh1 is shifted, and the position deviation data Δh+ is taken out from the storage section Δhm in the register 1 which corresponds to the distance β2 between the second main rolls 3b from the image sensor 9, and is sent to the first comparison circuit 18. It is input to determine whether or not the roll gap correction in the ascending direction of the second main roll 3b is necessary, and based on this determination result, the position deviation Δh+ is outputted as a gap position correction signal to the gap position controller of the second main roll 3b. At the same time, positional deviation data Δh1 is taken out from the storage section Δhn in the register 1 which corresponds to the distance Ω1 between the first main rolls 3a from the image sensor 9, and is inputted to the second comparison circuit 19 to The necessity of roll gap correction in the downward direction of the main roll 3a is determined, and the position deviation 6 is determined based on the result of this determination.
111 minutes is output as a gap position correction signal to the gear position side 2 controller of the first main roll 3a.

Therefore, by changing the roll gap of the second main roll 3b, the downward warp of the material to be straightened is corrected, and at the same time, the first
Since the upward warping of the material 1 to be straightened can be corrected by changing the roll gap of the main roll 3a of the first main roll 3a, when the material 1 to be straightened is bitten by the first main roll 3a, the first main roll 3a is automatically moved one after another. By correcting the roll gap between the second main rolls 3a and 3b, it is possible to improve the straightening effect regardless of the curved shape of the material 1 to be straightened.

In the above embodiment, a case has been described in which an image sensor using a contrast method is used as a means for detecting the flange lower position, which is the warped position of the material 1 to be straightened, but this is not limited to this, and other means may be used. Even if the position of the lower part of the flange of the material to be straightened 1 is detected, the same effect as described above can be obtained.

[Effects of the Invention] As explained above, according to the present invention, the warp position of the material to be straightened, that is, the lower flange position, is determined by the warp position detection means arranged in the direction perpendicular to the traveling direction of the material to be straightened. is detected, the positional deviation between this flange lower position and the basic position is calculated, and this position (- difference data is sequentially stored in the data register means at the timing of the count-up signal, and the second main roll and the first Position deviation data is retrieved from each storage section in the data register means corresponding to the main roll position, and the roll gap correction required in the upward or downward direction of each of the second and first main rolls is determined by the first and second comparison means. By making a negative determination and outputting each position deviation data as a gap position correction signal to the respective gap position control means based on the determination result, the roll gap of each of the second and first main rolls is changed and the material to be straightened is An extremely reliable straightening machine control device that can automatically correct the roll gap and improve the straightening effect regardless of the curved shape of the material to be straightened. can be provided.

3

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing an example of the configuration of a straightening machine equipment mechanism to which the present invention is applied; Fig. 2 is a block diagram showing an embodiment of a control device for a straightening machine according to the present invention; FIG. 4, which is a diagram for explaining detection of the lower flange position of the material to be straightened in the embodiment, is a schematic diagram showing an example of the configuration of a conventional straightening machine equipment mechanism. 1... Material to be straightened, 2... Conveyance table, 3a... Main roll, 3b... Second main roll, 3 c =-
Third main roll, 4 a, 4 b, 4 c - main roll electric motor, 5 a, 5 b, 5 c... gap adjustment mechanism,
5a, 5b, 6c... gap electric motor, 7a, 7b...
...Gap position detector, 8...Load cell, 9...
・Image sensor - 10...Light emitter, 11...Control device, 12...Speed detection section, 13...Sampling time calculator, 14.Counter 15...Data memory, 16...Difference calculation 17...Data register 18.First comparison circuit, 19...Second comparison circuit.

Claims (1)

[Scope of Claims] Consisting of first to third main rolls arranged in sequence along the traveling direction of a material to be straightened rolled in a section rolling equipment, and a gap adjustment mechanism for these, A control device for a straightening machine that corrects warpage in the longitudinal direction of a straightening material, comprising: a biting detection means for detecting that the straightening material is bitten by a first main roll; a warp position detection means installed in a direction in which the workpiece is straightened and detects a lower flange position of the material to be straightened; a speed detection means for detecting a straightening speed of the material to be straightened from the first main roll; The distance per data is set as a constant from a certain number of multiple position data corresponding to the distance between the installation position and the first main roll position, and the distance per data and the correction speed from the speed detection means are set as a constant. Based on the sampling time calculation means that determines the sampling time per data, and the bite detection signal from the bite detection means, the sampling time output value from the sampling time calculation means is counted and a count up signal is output. counting means for storing the flange lower position of the material to be straightened as data, which is detected by the warped position detecting means based on the count-up signal from the counting means; and position data and reference of the data storing means. a deviation calculating means for calculating a positional deviation from the position; and a plurality of storage units corresponding to the distance between the installation position of the warp position detecting means and the first main roll position, and the positional deviation from the deviation calculating means is provided. The data is sequentially stored each time a count-up signal from the counting means is input, and
data register means for sequentially shifting previously stored position deviation data; and position deviation data from a storage section in the data register means corresponding to the distance between the installation position of the warp position detection means and the second main roll position. and determine whether or not to correct the gap of the second main roll, and output the position deviation data as a gap position correction signal to the second main roll gap position control means based on the determination result. the first comparison means and the position deviation data corresponding to the distance between the installation position of the warp position detection means and the first main roll position from the storage section in the data register means; a second comparing means that determines whether or not to correct the gap, and outputs the positional deviation data as a gap position correction signal to the gap position control means of the first main roll based on the determination result; A control device for a straightening machine.