JP3697928B2 - Crop cutting method and apparatus for metal plate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crop cutting method and apparatus for measuring a crop shape of a leading end of a metal plate and cutting the crop based on information on the measured shape.
Hereinafter, although a steel plate is illustrated and demonstrated as a metal plate, it is not limited to this. Moreover, although the crop cutting of the tip portion will be described, it is needless to say that it can be similarly applied to the tail end portion.
[0002]
[Prior art]
Conventionally, in the cutting of the leading edge of a steel plate, a method of determining the cutting position by measuring the shape of the crop has been performed (for example, see Japanese Patent Application Laid-Open No. H5-228511).
The crop may be cut longer or shorter depending on the line conditions and the like.
[0003]
In the case of a fishtail-shaped or uni-elongated crop, when the crop is cut longer, the crop portion 11 of the steel plate 1 is cut as shown in (a ₁ ) and (b ₁ ) of FIG. The tip of the steel plate 1 has a clean rectangular shape. On the other hand, when the crop is cut short, the tip of the steel plate 1 has a shape as shown in (a ₂ ) and (b ₂ ) of FIG.
[0004]
Further, in the case of a tongue-shaped crop, the crop leading end 12 is cut short as shown in FIG. 5 (a ₃ ).
In the crop cutting, if the crop length is cut long, trouble in the subsequent process can be avoided, but the yield decreases. If the crop length is shortened, the yield is improved, but the probability of trouble occurring in the subsequent process is increased.
[0005]
In general, a position where a fishtail or a tongue is avoided at the time of crop cutting is set as a cutting position. However, if there is no problem with the steel plate biting between the finish rolling mill, the hot run table, and the winder, the crop is cut shorter in preference to the yield than the end shape. Operations are taking place.
[0006]
[Problems to be solved by the invention]
However, in the case of a fishtail-shaped or uni-elongated crop, in order to cut the crop shorter, the position of the boundary of the cropping section (the dashed-dotted line shown in FIGS. 4 (a ₁ ) and (b ₁ )) If it is attempted to cut at the position), the crop portion 11 cannot be cut completely and may remain as shown in FIGS. 4 (a ₂ ) and (b ₂ ), which is a major cause of trouble in the subsequent process. ing.
[0007]
This is considered to be because when the cutting margin is small, the material to be cut enters between the blades of the cutting machine, so that the detachability deteriorates.
Further, as shown in FIG. 4 (c _1), when cutting short tip of the tongue-shaped crop is too light the drawing cropping tip 12 which has been cut as shown in (c ₂₎ fall There is a case in which a trouble occurs in that it is caught by the upper blade of the cutting machine and makes one rotation without getting rid of it. Thus, the crop tip 12 on the steel plate 1 also becomes a major trouble factor in the subsequent process.
[0008]
An object of the present invention is to solve the above-described trouble occurrence and to improve the operation rate of the line.
[0009]
[Means for Solving the Problems]
The present invention measures the crop shape of the metal plate, the cutting position is determined by calculating in accordance with the crop shape, Te crop cutting method odor metal plates to cut the crop portion, during cutting of the crop unit previously cut malfunction that to put the cutting exclusion zone, fishtail-shaped, in the case of single stretch shape longitudinally from cropping unit boundary, uncut and range of cutting variability when cutting the crop unit in crop cutter There leave be set in consideration of the range that occurs when the tongue shaped, longitudinally from crop tip, cropping tip cut is hooked to the upper blade of the cutting machine without being completely fall put away in advance so as to set the weight, determined cutting position disconnects position avoidance process if the disconnection warning zone, the cutting position to a position out the cutting prohibited area Heal boss is had to solve the above problems by crop cutting method of the metal plate, characterized in that to cut the crop portions at the cutting position which resets.
[0010]
Further, the present invention computes an image processing apparatus for performing crop shape measurement of the metal plate, a shape classification device for classifying the crop shape in accordance with the measured shape, the cutting position of the crop unit in accordance with the classified crop shape The cutting position determining device to be determined in advance, and a cutting prohibition area where a cutting failure occurs when cutting the crop portion, in the case where the crop portion has a fishtail shape or a uni-stretch shape, in a longitudinal direction from the crop portion boundary. In addition, it is set in consideration of the range of cutting variation when cutting the crop part with a crop cutting machine and the range where uncut portions occur, and the tongue is a crop that has been cut in the longitudinal direction from the tip of the crop. tip previously be set from the weight thus hooked on the edge on the cutter without being completely dropped, determined by the cutting position determination device cleavage Location performs cutting position avoidance process if the disconnection warning zone, and the cutting position avoidance device to reset the cutting position, in accordance with the cutting position was re-set at the cutting position avoidance device, controlled by cutting controller The above problem has been solved by a crop cutting machine for cutting a metal plate and a metal plate crop cutting device.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
First, a range of cutting variation and a range in which uncut portions occur when a steel sheet is cut by a crop cutting machine will be described with reference to FIG.
FIG. 6 illustrates the case of cutting a steel plate 1 having a fishtail-shaped crop. As shown in FIG. 6, when the deepest portion of the fishtail recess is cut, cutting is performed at the position a indicated by a one-dot chain line. At this time, due to variation in cutting, actual cutting is performed at any point within the range of a _{+ to} a ₋ indicated by a dotted line (usually about ± 20 mm centering on the position a). Here, when a position and between a _c position indicated by the two-dot chain line (usually in the range of about 10 mm) is cut by takes place, is of a left completely without being completely cut above-described switching the crop.
[0012]
Here, considering the cutting variation of the cutting machine, a range of a _{+ to} a _c− is set as a cutting avoidance range (cutting prohibited area).
In addition, if the tip of a tongue-shaped crop is cut too short, the tip of the cut crop will be too light and will not fall completely, so it will ride on the steel plate. , Which is considered to have enough weight to fall) is defined as a cutting avoidance range (cutting prohibited area).
[0013]
Hereinafter, a specific avoidance method will be described with reference to FIG.
In FIG. 3 (a), a is the deepest position of the fishtail recess, b in (a) to (c) is the foremost position of each crop protrusion, and c in (a) is 2 in the fishtail. This is the foremost position of the second convex portion, and d in (b) indicates the deepest portion of the convex portion of the single-stretched crop (specifically, the position corresponding to 95% of the plate width of the steel plate).
[0014]
In FIG. 3, a _{1 to} a ₂ , b _{1 to} b, c _{1 to} c ₂ , and d _{1 to} d ₂ are cutting avoidance ranges (cutting prohibited areas) in each case.
Here, in the present invention, for example, when the cutting position is determined within the range of a _{1 to} a, cutting avoidance processing is performed, and the cutting position is switched to a ₁ and changed. When the cutting position is determined within the range of a _{2 to} a, cutting avoidance processing is performed and the cutting position is switched to a ₂ and changed.
[0015]
Hereinafter, b ₁ b ₁ in the case of ~b, c ₁ in the case when the c _2, d ₁ ~d If For to c of c _1, c ₂ ~c of d _1, d ₂ ~d d _2. Perform each cutting position change process.
Here, as a result of avoiding by changing the cutting position as described above, the cutting position may be specified in another cutting prohibited area. In that case, when the short cut side of a ₂ , c ₂ , d ₂ corresponds, the cutting position is changed to the long cut side of a ₁ , c ₁ , d ₁ on the opposite side. When the long cut side such as a ₁ , b ₁ , c ₁ , d ₁ is applicable, the cutting position is changed to the long cut side of the corresponding cut prohibited area.
[0016]
By changing the cutting position as described above, occurrence of cutting trouble can be avoided.
FIG. 1 shows a processing flow of the crop cutting method of the present invention, and details thereof will be described below. The following processing is online processing during steel plate conveyance in a steel plate conveyance line. Moreover, although the following description demonstrates the crop cutting process of the front-end | tip part of a steel plate, it cannot be overemphasized that the crop process of a rear-end part is the same.
[0017]
First, an image data capturing process 100 is performed to capture a crop image at the tip of the steel plate. The captured crop image is subjected to shape feature extraction by image processing 110. The shape of the crop-extracted shape data is identified by the shape classification processing 120, and the cutting position of the crop is determined by the cutting position determination processing 130. The above processes 100 to 130 are processes that have already been put into practical use, and a detailed description thereof will be omitted here.
[0018]
Next, the cutting position avoiding processing block 140 is entered, cutting position avoiding processing is performed, and it is judged 142 whether or not the cutting position (temporary position) determined above is within the cutting prohibited area, and is within the cutting prohibited area. In this case, the cutting position changing process 144 described above is performed. If it is outside the cut-prohibited area, the cutting position final determination process 146 is performed with that position as the final cutting position, and the cutting process is finally performed by the crop cutting machine.
[0019]
FIG. 2 shows an apparatus configuration embodying the above-described crop cutting flow.
In FIG. 2, the steel plate 1 is transported on the transport line 2. The cropped portion of the steel plate 1 being conveyed is imaged by the camera 4, and the captured image information is processed by the image processing device 5. Then, the shape classification device 6 classifies the fishtail shape, the half-stretched shape, the tongue shape, and the like, and the cutting position determining device 7 determines the cutting position (temporary position) according to the classification. The cutting position avoidance device 8 determines whether or not the cutting position is within the cutting prohibited area. If the cutting position is within the cutting prohibited area, the avoidance process described above is performed to determine the final cutting position. Then, the final cutting position information is sent to the cutting control device 9, and the crop cutting machine 3 cuts the crop.
[0020]
Here, as the crop cutting machine 3, a flying cut shear is applied to cut the crop portion of the steel plate during transportation. However, the invention is not limited to this, and the normal shear is stopped by temporarily stopping the transportation of the steel plate. You may make it cut | disconnect by.
[0021]
【Example】
The crop cutting device of the present invention was applied to a crop cutting machine (flying crop shear) installed on the finishing rolling mill entrance side of the hot rolling line.
Conventionally, due to crop cutting failure, rolling troubles in a finish rolling mill, conveyance troubles in a hot run table, winding troubles in a winding machine, etc. often occur, and a total down time of 6% has occurred.
[0022]
However, application of the present invention can eliminate any troubles caused by crop cutting failure, eliminate the downtime, and improve the hot rolling line operating rate by 0.1%.
[0023]
【The invention's effect】
According to the present invention, the crop cutting failure can be solved, and the serious trouble of the line due to the crop cutting failure can be eliminated. In addition, it is not necessary to set an extra cutting margin in anticipation of line trouble, and the cutting margin can be shortened, which greatly contributes to improvement in yield.
[Brief description of the drawings]
FIG. 1 is a flowchart illustrating a method for cutting a metal plate according to the present invention.
FIG. 2 is a schematic view showing a configuration of a metal sheet crop cutting device of the present invention.
FIG. 3 is a plan view for explaining a crop cutting position in the metal plate crop cutting method of the present invention;
FIG. 4 is a schematic diagram illustrating an example of a crop cutting position of a metal plate and a crop cutting defect.
FIG. 5 is a plan view for explaining a state of crop cutting of a metal plate.
FIG. 6 is a plan view for explaining variations in crop cutting positions of a metal plate.
[Explanation of symbols]
1 Metal plate (steel plate)
2 Transport line 3 Crop cutting machine (flying crop shear)
4 Camera 5 Image Processing Device 6 Shape Classification Device 7 Cutting Position (Temporary) Determination Device 8 Cutting Position Avoidance Device 9 Cutting Control Device
11 Crop section
12 Crop tip

Claims (2)

Measuring the crop shape of the metal plate, the cutting position is determined by calculating according to the cropping shape, crop cutting method odor metal plates to cut the crop portion Te,
Previously cut failure that Oko cut prohibited zone for cutting out the cropping unit, fishtail-shaped, in the case of single elongation shape, the cropping unit boundary in the longitudinal direction, at the time of cutting the crop unit in crop cutter Set in consideration of the range of variation in cutting and the range in which uncut portions occur, and in the case of a tongue shape, the cutting tip does not fall down in the longitudinal direction from the tip of the crop. Set it from the weight that will be caught by the upper blade,
Determined cut position performs cutting position avoidance process if the disconnection warning zone, said cutting reset the cutting position to a position outside the prohibited area, to perform the cutting of the crop portions at the cutting position which resets A method for cutting a metal plate crop. An image processing device that measures the crop shape of a metal plate, a shape classification device that classifies the crop shape according to the measured shape, and a cutting position determination that calculates and determines the cutting position of the crop portion according to the classified crop shape Equipment,
If the crop part has a fishtail shape or a single stretch shape, the crop part is cut in the longitudinal direction from the crop part boundary in the longitudinal direction by using a crop cutting machine. In consideration of the range of cutting variation when cutting and the range where uncut portions occur, the tongue is cut in the longitudinal direction from the tip of the crop without causing the tip of the crop to fall down. leave to set the weight would be hooked to the upper blades of the cutting position determination device determined cut position performs cutting position avoidance process if the disconnection warning zone, re-set the cutting position Cutting position avoidance device and a crop that is controlled by a cutting control device according to the cutting position re-set by the cutting position avoidance device and cuts a metal plate crop Crop cutting apparatus of the metal plates to be composed of a cross machine.

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