JP3411145B2 - Control device for warpage correction machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a controller for automatically detecting a warp height on the front surface of a warp straightening machine of a steel sheet and correcting the height by the warp straightening machine.

[0002]

2. Description of the Related Art Generally, in the hot rolling of thick plates, the tip of the steel plate warps due to temperature deviation of the front and back surfaces of the slab in the heating furnace or temperature deviation due to the difference in heat loss between the front and back surfaces of the steel plate during rolling. It often has a shape, which is one of the obstacles to rolling work. As a method for straightening the warp of a rolled material, as disclosed in Japanese Patent Laid-Open No. 50-118227,
There is a method of detecting warpage by a warpage detector installed around the rolling mill and lowering the idle roll etc. to correct the steel sheet warpage, but this is an effective technique only for warpage It is not popular in rolling. In general,
The warp shape of the front end of the steel sheet is controlled by different peripheral speed control or the like that finely adjusts the vertical roll speed of the rolling mill according to the warp shape (upward warp or downward warp) during rolling. In addition, the warp shape of the tip of the steel sheet is controlled to an appropriate state by adjusting the roll opening of the hot straightening machine even before charging into the cooling floor. However, if the crop shape is irregular, such as the fish tail type, the leading edge of the crop tends to be warped, and the warped crop leading edge is between the transport tables during the shear line transportation after the cooling floor is discharged. There was a problem that caused an operating problem of plunging into a narrow gap represented by a tracking sensor embedded opening or an idle beam facility opening. When this trouble occurs, not only the steel sheet becomes untransportable, but also the plunge part and the defective shape deformation part accompanying it increase as cutting parts, which significantly reduces the product yield and greatly damages the equipment. It has caused a deterioration in operating costs.

For this reason, with respect to the warp shape member of the crop portion, the work of correcting the warp shape by a warp straightening machine immediately after the cooling floor is paid out is performed depending on the visual judgment of a person. In this work, since the person determines whether or not the correction is performed and the correction position at the time of correction based on the warp shape and crop shape (velo shape, one-sided angle, both-sided angle, flat) of the cropped portion grasped through the TV monitor, etc. There is a problem that the product yield may be reduced because it may enter the effective part of the product, and there is a plunge problem due to the inability to correct the downward warp shape to the upward warp shape due to the variation in the presence / absence of correction. No solution was found.

[0004]

SUMMARY OF THE INVENTION The present invention focuses on the above-mentioned problems, and when the thick plate after rolling is sheared to the product size, the warp shape and the warp height generated at the tip of the rolled material are determined. It is an object of the present invention to provide a control device that detects in advance before a shearing step and automatically corrects the state so that the shearing step can be stably conveyed.

[0005]

Means for Solving the Problems The present invention has been made to solve the above-mentioned problems, and means 1 is to increase the warp portion of a steel plate by a warp straightening machine so that the steel plate is moved upward.
In a device for pushing up and straightening the sheet, a moving distance detecting means (measuring roll) 12 for detecting a moving distance of the steel plate, and a tip shape and a warp amount of the moving steel plate are detected on the entrance side of the warp straightening machine. A steel plate shape detecting means (steel plate shape meter) 3 and a steel plate tip detecting means (sensor) 11 for detecting the moving steel plate tip portion are provided. Further, the steel plate shape detecting means 3 detects the tip shape of the steel plate and the amount of warpage. Information is input, the necessity of straightening the steel plate tip is determined from this information, and a steel plate shape meter information processing unit 100 that obtains a correction position when correction is required is provided, and the correction position from the steel plate shape meter information processing unit 100 is provided. Based on the information and the steel plate moving distance information from the moving distance detecting means 12, it is determined that the correction position of the steel plate has reached the inside of the warp straightening machine , and the down warping portion is pushed up by the warp straightening machine.
This is a controller for a warp straightening machine provided with a warp straightening machine control unit 103 for starting the straightening control.

Further, the means 2 is a warp detection device for detecting the warp amount of the front end of the steel plate after straightening on the exit side of the warp straightening machine.
Output means (warp detectors) 15 and 16 are provided to detect this.
It is necessary to re-straighten the steel plate tip after straightening based on the amount of warpage.
It is necessary to decide whether it is necessary or not and correct the warp again.
In case that the
It is a controller for a warp straightening machine provided in the described steel plate shape meter information processing unit 100 .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Regarding plate warpage due to rolling of thick steel plate, as for conventional warpage, solutions such as idle roll reduction straightening method, rolling roll speed difference adjusting method and roll opening adjustment of hot straightening machine have been proposed. Although it has been proposed that almost no problem has been reached, as for the warp, only the means for visually judging and correcting the warp as described above is the automatic judgment and the automatic operation of the corrector based on the present invention. This has made it possible to save a lot of labor.

That is, the shape of the tip of the thick steel plate after rolling is measured by a steel plate shape meter, and based on this information, a correction level operation command is given to the clamp device and the correction cylinder of the warp correction machine to perform the correction work. Then, the straightening level after straightening is measured by measuring the warp straightening condition of the thick steel plate tip end with a plurality of warp detectors, and re-straightening is performed for things such as insufficient straightening. The automation of this series of operations and operations has made it possible to make the correction line unmanned.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view schematically showing an outline of an equipment line configuration for processing a steel sheet after the completion of the thick plate rolling. The thick steel sheet S rolled and hot-corrected in a normal rolling line 1 is placed on a cooling floor 2. The steel plate is conveyed, and then the steel plate shape meter 3 detects the profile of the entire thick steel plate including the warp amount, the warp amount of the four circumferences, the crop shape and the crop length, and the steel plate profile information measured by the steel plate shape meter 3. Steel plate shape meter information processing unit 100 that determines whether warp correction is necessary and the correction position at the time of correction, a warp straightening machine 4 that corrects the warp portion of the thick steel plate S, and a thick steel plate provided in the shear line 5 Sensor 17 for detecting the traveling position of the steel plate, an idle beam 18 for supporting the thick steel plate S from below, a steel plate tip detector 6 for detecting the steel plate tip portion, and a not-shown command based on the information obtained by the steel plate shape meter 3. Dividing shearing machine 7 for rough dividing shearing and shearing crops based on information processed by an information processing computer, edge cutting / longitudinal cutting shearing machine 8 for cutting uneven edges on the longitudinal edge side to a target width, final product The finishing shearing machine 9 shears to a target size of.

FIG. 2 shows the overall structure of the warp straightening line including the warp straightening machine 4 shown in FIG.
The thick steel plate S conveyed from the cooling floor 2 is conveyed on the conveyance roller table 10 and the downward warp straightening machine 4 performs thick steel plate downward warp correction work. The thick steel plate S passes under the measuring roll 12 and when the sensor 11 detects the passage of the tip end, the measuring roll 12 descends and comes into contact with the upper surface of the steel plate. Simultaneously with the detection of the S tip, the running distance is counted. Of course, a non-contact type sensor may be used instead of the measuring ring 12.

Next, the steel plate shape meter 3 detects the profile of the entire thick steel plate S including the amount of warp, the amount of warp at the four circumferences, the crop shape and the crop length, etc. Whether or not warp correction is necessary and the correction position during correction are determined. After that, the thick steel plate S is conveyed to the warp straightening machine 4, and an appropriate portion (described in detail in FIG. 6 described later) from the tip of the crop portion is held by the clamp device 13 arranged on the upper and lower portions of the thick steel plate S. In this state, the warp straightening cylinder 14 provided on the rear surface of the clamp device 13 lifts the warp portion upward by a necessary amount to correct the warp portion. In the thick steel plate thus corrected, the warp height of the warp portion is detected by the warp detectors 15 and 16 installed at least one behind the warp straightening machine 4, and the warp height of the reference value or less is determined. In that case, the correction position is changed again to perform correction. Normally, two warp detectors are installed, and an upper limit check is performed on the warp height of the front end of the steel plate during re-correction.

FIG. 3 illustrates the overall system configuration of the embodiment of the present invention. In the manufacturing process of a normal thick steel plate, various conditions (steel type, size, rolling condition, shear condition, etc.) of the steel plate are accumulated in the thick plate online operation computer 101 (including the shear measuring function) and used for operation instruction. . In carrying out this example, various information necessary for shearing is transmitted from the thick plate online operating computer 101 to the shear line control computer 102.

As described above, when the steel plate shape meter information processing unit 100 installed on the warp straightening line detects the thick steel plate S by the entrance side table sensor 11, it descends the measuring roll 12 to the upper surface of the thick steel plate S. In order to make the contact, the descending instruction is output to the ascending / descending drive cylinder 106, and the optimum warp correction condition is determined based on the crop information including the warp, crop shape, crop length, etc. of the steel plate to be corrected detected by the steel plate shape meter 3. , Electric control device 103 for warp straightening machine
Information such as the presence or absence of warp correction and the correction position during correction is transmitted to. Based on the transmitted information on the optimum warp straightening condition and the distance information on the straightened portion measured by the measuring roll 12, the clamp device 13 and the warp straightening cylinder 14 constituting the down warp straightening machine 4 are driven to drive the respective portions. Warp correction. After completion of the straightening work, the table control drive motor 105 is operated by the drive completion signal from the drive controller 104 in the warp straightening machine 4 to transport the thick steel plate S to the next step. In addition, the straightening result value data of each thick steel plate S straightened by the warp straightening machine 4 is transmitted to the thick plate online operation computer 101 through the shear line control computer 102, and is reflected in the shear measuring condition of each thick steel plate S. It is also stored in the operation management computer 107 as operation result data.

The determination procedure in the steel plate shape meter information processing unit 100 will be described below with reference to FIG. First, the information processing computer 100 of the steel plate shape meter 3 uses the steel plate shape data from the steel plate shape meter 3 as a steel plate profile (S1).
Based on the above, the crop shape determination of the thick steel plate front end portion (S2) and the warp amount are calculated (S3) to determine whether or not the warp straightening device 4 is applicable to warp straightening (S4). Here, the steel plate information (S5) such as the size transmitted from the thick plate online operation computer 101 is referred to. Next, when it is determined that the downward warp straightening can be applied, the straightening position calculation when the straightening work is applied is calculated for each crop shape (S6), and the clamp and cylinder drive control of the downward warping straightening machine 4 that actually performs the straightening work is performed. The necessary information is transmitted to the device 104, and the clamp device 13 and the warp correction cylinder 14 are operated to correct the warp.

As a result of controlling the warpage of the thick steel plate by the above-mentioned judgment method, the effective length of the rolled thick steel plate S can be utilized to the maximum extent and the accurate lowering can be performed without human intervention. It has become possible to perform warp correction work.
Next, the control of the warp straightening machine 4 will be described with reference to FIG. The thick steel plate S transported from the cooling floor 2 is transported on the transport roller table 10 and enters the warp straightening line.
When the sensor 11 detects that the leading end of the thick steel plate has passed (S1), the measuring roll 1
2 comes down and comes into contact with the upper surface of the steel plate, and at the same time when the tip of the thick steel plate of the steel plate shape meter 3 is detected, counting of the passing distance is started. Next, the steel plate shape meter information processing computer 100 calculates various parameters relating to the crop shape in order to identify the crop shape (S2), and judges the crop shape and the crop shear position (S3). Regarding this cropped shape, there are usually types such as flat shape, tongue shape, one-sided shape, and both-sided shape, and these shapes are identified by the steel plate shape information processing computer 100,
A correction position and the like described later are calculated according to each shape.

Regarding the above-mentioned criteria for determining the crop shape, FIG.
A description will be given with an example of a single angle. In FIG. 6A, the maximum point is 1.
At the point, the crop length (L) is l based on the position of the effective width.₁
mm or more, and the inflection point is near the width center (±
Crop shapes other than Wmm), and FIG.
There are two maximum points and each crop length (L₁)When
(L ₂) Is based on the position of the effective width, and the difference is l₂mm
The above is an example of the determination of the crop shape. In addition, this
The effective width is the product width plus the guarantee margin for shearing accuracy and the margin.
The calculated width. Further, in the steel plate shape meter 3, a thick steel plate is used.
The amount of warpage at the tip can also be detected.
Warpage maximum value (The maximum warpage value at the four edges of the thick steel plate
Point to. ) Is calculated (S4). Depending on the amount of warp obtained
Then, it is determined whether the warp straightening machine 4 is applicable (S5). Sanawa
However, if the amount of warp is relatively unproblematic,
If no straightening work is required (No), the warp straightening machine 4
And give uncorrected instructions (S6), the thick steel plate is conveyed as it is.
It is directly transported to the next process on the roller table. Meanwhile, below
Thick steel plates that have been judged to require warpage correction (Yes)
Warp correction position is calculated for each crop shape (S
7), a clamp device 13 constituting the warp straightening machine 4 and
Electric control device 1 for driving the warp straightening cylinder 14
The correction instruction and the necessary information are transmitted to 03 (S8), and
Correction work is started.

The calculation of the warp correction position for each crop shape described above differs depending on each crop shape, but as shown in FIG. 6A, an example in which the crop shape is one-sided will be described. In the figure, the portion indicated by the dotted line is the calculated correction position (x). This (x) position is calculated in the case of a unicorne as the correction position at the tip of the corner or at a position of l ₃ mm from the tip of each corner.

Further, the straightening operation of the warp straightening machine 4 will be described with reference to FIG. In FIG. 5, the warp straightening operation is started for the thick steel plate S that is determined to require the warp straightening (S8) (the thick steel plate that does not require the warp straightening has already been described in FIG. 4). It becomes a work flow.)
However, here, after the initialization of the number of corrections (S9), the crop shape, the amount of warp, and the crop length level determined by the steel plate shape meter information processing computer 100 first connected to the steel plate shape meter 3 are set. The automatic length positioning ( APC: automatic position control ) is set to the corresponding correction position (S10, S11). When the correction position setting is completed (S
12) the electric control device 10 built in the warp straightening machine 4
The information required for straightening is output to 3 (S13), the clamp device 13 and the warp straightening cylinder 14 are operated to complete the straightening work (S14), but the number of straightenings is counted up at this point (S15), It is determined whether the initially set number of corrections have been performed.

If the correction has been performed the set number of times, the correction operation is completed (S16), and then the correction effect confirmation by the warp detector 15 is performed (S18). Next correction position APC output part again (S17)
Will be returned to and the correction work will be continued. After the completion of the correction operation, the warp detectors 15 installed on the rear surface of the warp straightening machine 4 inspect the thickened steel plate S whose straightness has been warped after the straightening operation is inspected and determined. The thick steel plate S that has passed the warp detector 15 (S18) is recognized as warp correction completed (S19), and the warp detector 16 strictly checks the warp state again and is conveyed to the next step (S20 to S2).
0). However, for thick steel plates where warpage correction is still insufficient, the correction position APC value is finely adjusted (S24) until the preset upper limit value of the number of corrections is exceeded (S23), and then the correction position APC output portion is returned again and correction is performed. Work will continue. If the upper limit of the number of corrections is exceeded (S25), the thick steel plate S is stopped (S26), and guidance is output to wait for operator intervention (S2).
7).

[0020]

As described above, according to the present invention, conventionally, the warp of the thick steel plate after rolling was visually judged to correct the required level, and the unsatisfactory correction result caused by the correction was further In addition to the excessive shearing of the cropped portion, all of these series of operations required human power.However, the necessary information such as the steel plate profile was taken into the steel plate shape meter, and the warp condition and the crop shape were measured. By grasping the details one by one, it becomes possible to automatically instruct the warp correction work by the warp correction machine under the optimum conditions. As a result,
Not only did the warp correction work be unmanned, but also complete warp correction could be realized, and there was no transport trouble caused by the warp correction.

[Brief description of drawings]

FIG. 1 is a plan view showing the overall configuration of a shear line according to the present invention.

FIG. 2 is a side view schematically showing a warp straightening line according to the present invention.

FIG. 3 is a diagram showing an information processing system for warp correction according to the present invention.

FIG. 4 is a functional block diagram relating to straightening of a warp according to the present invention.

FIG. 5 is a flowchart of a straightening condition setting portion relating to straightening according to the present invention.

FIG. 6 is a diagram showing a crop determination standard and a correction position in the warp correction according to the present invention.

FIG. 7 is a flowchart of a correction operation portion related to warp correction according to the present invention.

[Explanation of symbols]

1 ... Rolling line 2 ... Cooling floor 3 ... Steel plate shape meter 4 ... Warp straightening machine 5 ... Shearing line 6 ... Steel plate tip detector 7 ... Split shear 8 ... Ear cutting / vertical cutting shears 9 ... Finishing shearing machine 10 ... Transport table roller 11 ... Sensor 12 ... Majoring roll 13 ... Clamping device 14 ... Warp straightening cylinder 15 ... Warp detector 1 16 ... Warp detector 2 17 ... Tracking sensor 18 ... Idol Beam 100 ... Steel plate shape information processing computer 101 ... Plate online operating computer 102 ... Computer for controlling shearing line 103 ... Electric control device for warp straightening machine 104 ... Drive control device for warp straightening machine 105 ... Table transport drive motor 106 ... Lifting drive cylinder 107 ... Operation management computer

Continuation of front page (56) Reference JP-A-8-267113 (JP, A) JP-A-8-215704 (JP, A) JP-A-8-174066 (JP, A) JP-A-3-297504 (JP , A) Actual Kaihei 4-12311 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21D 1/05

Claims (2)

(57) [Claims] 1. An apparatus for straightening a warp portion generated in a steel plate by a warp straightening machine to push the steel plate upward to correct the movement of the steel plate to the entrance side of the warp straightening machine. A distance detecting means, a steel plate shape detecting means for detecting a tip shape and a warp amount of the moving steel sheet, and a steel plate tip detecting means for detecting the moving steel plate tip portion are further provided, and the steel sheet tip detecting means further detects the tip of the steel sheet. The information of the shape and the amount of warp is input, the necessity of the straightening of the steel plate tip is requested from this information, and if the straightening is necessary, the steel plate shape meter information processing unit is provided. The straightening control for pushing up the downward warping portion by the downward warping straightening machine by judging that the straightening position of the steel sheet has reached the inside of the downward warping straightening machine based on the straightening position information from Warp to start A controller for a warp straightening machine, comprising a straightening machine control unit. 2. The method of claim 1] put in after the correction to the exit side of the lower warp straightener
Equipped with a warp detection means for detecting the amount of warp of the steel plate tip,
Based on the detected warpage amount, the straightened steel plate tip is
Once again decides whether or not it is necessary to correct the warp again
If necessary, straighten with a warp straightening machine
The controller for the warp straightening machine according to claim 1 , wherein a function is provided in the steel plate shape meter information processing unit .