JP4358968B2 - Optimal cutting position detector for section steel crop - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, for example, in the rolling of an H-section steel, which is one of the section steels, detects the optimum cutting position of the H-section steel crop that detects the optimum cutting position of the crop formed on the H-section steel after rolling in the breakdown mill. Relates to the device.
[0002]
[Prior art]
For example, in rolling of H-section steel, which is a type of section steel, beam blanks, blooms and slabs manufactured by continuous casting, etc., are roughly rolled in multiple passes in a breakdown mill (BD) as shown in FIG. Thereafter, it is rolled into the shape of an H-shaped steel by rolling in a plurality of passes in an intermediate universal (UR), an edger mill (E), and a finishing humversal mill (UF). In the rolling of the breakdown mill (BD), a tongue-shaped crop is formed on the material to be rolled as shown in FIG. This crop is cut by a crop cutting machine such as a rotary saw in order to facilitate biting in a rolling mill in a subsequent process.
[0003]
The length of the crop to be cut should be as short as possible in order to improve the yield of the H-section steel product. However, since the H-shaped steel crop is warped up and down due to rolling, if it is made too long, for example, an accident of a biting failure occurs in a rolling mill as a subsequent process. Therefore, in order to satisfy both the above-mentioned problems at the same time, it is important to detect the optimum crop cutting position for each product type.
[0004]
In the H-section steel rolling line, the length and warpage of the crop for each product type to be rolled are generally grasped as empirically measured values from operations, so the crop width s and web width at the optimal crop cutting position for each product type. The optimum ratio s / w with w or the optimum ratio sh / sw between the crop height sh and the flange height wh can be set in advance.
[0005]
The detection of the crop cutting position is, for example, described in Japanese Utility Model Publication No. 63-124602. Since the shape steel crop is a three-dimensional crop, the shape steel is obtained from both the upper side and the side of the rolling line. Are captured by a two-dimensional camera, and the image signal and a product size signal input in advance are compared, and the crop shape and crop cutting length are calculated.
[0006]
[Problems to be solved by the invention]
However, when a two-dimensional camera is used, since there is a limit on the number of pixels per unit, a wide range is detected with a small number of pixels, so that the detection area per number of pixels is widened, resulting in poor resolution. In order to increase the resolution, it is necessary to reduce the detection area per pixel, and there is a problem that the number of detectors must be increased.
[0007]
In addition, when the shape of the crop becomes longer, an error between the true crop position and the position recognized as the crop for control becomes large, and the cutting accuracy deteriorates. In addition, there are many image processing softwares for material edge detection, which takes time and is not suitable for online cutting control.
[0008]
Therefore, the present invention provides an optimum cutting position detection device for a shape steel crop that can improve the cutting accuracy by reducing the detection error of the optimum cutting position of the shape steel crop.
[0009]
[Means for Solving the Problems]
An optimum cutting position detecting device for a shape steel crop according to the present invention includes a crop width measuring means for continuously measuring a crop width of a shape steel, a material width measuring means for continuously measuring a regular width of the shape steel, and a shape steel. The conveyance amount measuring means for measuring the conveyance amount of the steel, the conveyance amount of the shape steel measured by the conveyance amount measurement means, the crop width S of the shape steel continuously measured by the crop width measurement means, and the material width measurement means The S / W at each position in the lengthwise direction of the crop is calculated from the material width W of the shape steel continuously measured at, and the calculated S / W is stored in advance and stored in advance. And an optimum cutting position calculating means for calculating the optimum cutting position by comparing and calculating the crop width s of the optimum crop cutting position determined for each and the optimum ratio s / w of the material width w. .
[0010]
Instead of the width measuring means, using the height measuring means, the conveyance amount of the shape steel measured by the conveyance amount measuring means, and the crop height Sh of the shape steel continuously measured by the crop height measuring means, The Sh / Wh at each position in the longitudinal direction of the crop is calculated from the material height Wh of the shape steel continuously measured by the material height measuring means, and the calculated Sh / Wh is stored. it may be calculated optimum cutting position and optimum crop height of the crop cutting position sh and materials height wh optimum ratio sh / wh predetermined for each type of the shape steel comparison operations to.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The optimum cutting position detection apparatus for the shape steel crop of the present invention is provided with two one-dimensional sensors such as a CCD camera for measuring the width or height of the one-dimensional self-luminous detection method in the rolling line direction. The sensor spacing is wider than the maximum crop length among the various shapes rolled in the rolling line.
[0012]
When a one-dimensional sensor that measures the width or height of the one-dimensional self-luminous detection method is used, the number of pixels can be increased to 5000 pixels or more. As a result, the resolution is improved, the error is small, and the cutting accuracy is small. improves. In addition, by using two one-dimensional self-luminous detection type width gauges, the optimal cutting position of the crop can be detected at low cost and in real time. The measurement error, length measurement error due to temperature detection variation, width, height, etc., and measurement error due to the threading position were processed with a huge amount of software, but still could not be completely corrected, In the present invention, absolute width and length values are unnecessary, and by taking the ratio of two detection values, a huge amount of software is unnecessary and can be simplified.
[0013]
Although it is possible to detect the optimum cutting position with a single one-dimensional sensor, in this case, the crop width and measurement time position of the continuously measured shape steel are stored, and the web width is stored. It is necessary to determine the optimum cutting position from the measurement results stored so far at the time of detecting.
[0014]
Therefore, a storage device for storing a large amount of crop width measurement data is required, and software for determining the cutting position becomes complicated.
[0015]
【Example】
Example 1
FIG. 1 is an explanatory view of an embodiment of an optimum cutting position detecting apparatus for H-section steel crop among the section steels to be the subject of the present invention, and is based on width measurement. A one-dimensional sensor which is a crop width measuring means 2 for measuring the crop width S of the H-section steel 1 conveyed after the rolling of the breakdown mill and a web width measuring means 3 for continuously measuring the web width W of the H-section steel. A certain one-dimensional sensor is arranged on the upper part at intervals in the direction of the H-section steel rolling line.
[0016]
The conveyance amount of the H-section steel 1 conveyed by the conveyance roller 4 is measured by a conveyance amount measuring means 5 such as a pulse generator or an absolute encoder provided on the conveyance roller 4.
[0017]
The crop width S of the H-section steel 1 continuously measured by the crop width measurement means 2, the web width W of the H-section steel 1 continuously measured by the web width measurement means 3, and the transport amount measurement means 5 The measured transport amount of the H-section steel 1 is input to the optimum cutting position calculation means 6, and the S / W at each position in the longitudinal direction of the crop is calculated.
[0018]
The optimum cutting position calculation means 6 stores the optimum ratio s / w of the crop width s and the web width w determined in advance by the material size, position data, etc., for each product type. The optimum S / W is compared and calculated to calculate the optimum cutting position, and the result is input to the transport roller control device 7. The conveyance roller control device 7 controls the conveyance amount so that the optimum cutting position is located in the crop cutting machine by controlling the number of rotations of the conveyance roller 4 based on the optimum cutting position.
[0019]
Example 2
FIG. 2 is an explanatory view of another embodiment of the optimum cutting position detection apparatus for the H-section steel crop of the present invention. The difference from the first embodiment is that the optimum cutting position is calculated by height measurement instead of width measurement. Is.
[0020]
1-dimensional sensor which is the crop height measuring means 8 for measuring the crop height Sh of the H-shaped steel 1 being conveyed and the flange height measuring means 9 for continuously measuring the flange height Wh of the H-shaped steel 1 A dimension sensor is arrange | positioned in the side part direction at intervals in the rolling line direction of the H-section steel 1. FIG.
[0021]
The crop height Sh of the H-section steel 1 continuously measured by the crop height measuring means 8, the flange height Wh of the H-section steel 1 continuously measured by the flange height measuring means 9, and the transport amount The conveyance amount of the H-section steel 1 detected by the measuring means 5 is input to the optimum cutting position calculating means 6 and the ratio of Sh / Wh at each position in the longitudinal direction of the crop is calculated. The crop position is detected by determining a position where Sh / Wh> k (where k <1) exceeds a set value as a crop position.
[0022]
The optimum cutting position calculation means 6 stores the optimum ratio sh / wh of the crop height sh and the flange height wh determined in advance by the material size, position data, etc. for each product type, and is calculated by measurement. When Sh / Wh is compared and the optimum cutting position is calculated, the result is input to the material transport roller controller 7. The material conveyance roller control device 7 controls the conveyance amount so that the optimum cutting position is located in the crop cutting machine by controlling the rotation speed of the conveyance roller 4 based on the optimum cutting position.
[0023]
Although the example of H-section steel was shown in the above-mentioned embodiment, the present invention is not limited to this, and it can be effectively used as an optimum position detection device for an I-section steel crop as another example of a section steel mill. it can.
[0024]
【The invention's effect】
According to the present invention, since the one-dimensional sensor is used in a self-luminous system and soft correction is almost unnecessary, the optimum cutting position of the crop can be detected at low cost and at high speed. As a result, it is possible to improve the yield by reducing crop cutting loss, and to save labor when combining automatic positioning and automatic cutting of materials.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a device for detecting a cutting position of an H-shaped steel crop of the present invention.
FIG. 2 is an explanatory diagram of another embodiment of the H-section steel crop cutting position detection device of the present invention.
FIG. 3 is a diagram showing a section steel rolling line.
FIG. 4 is a schematic diagram of a crop.
[Explanation of symbols]
1: H-section steel 2: Crop width measuring means 3: Web width measuring means 4: Conveying roller 5: Conveying amount measuring means 6: Optimal cutting position calculating means 7: Conveying roller control device 8: Crop height measuring means 9: Flange Height measuring means S: Crop width W: Web width

Claims (2)

Crop width measuring means for continuously measuring the crop width of the section steel and material width measuring means for continuously measuring the regular width of the shape steel;
A conveyance amount measuring means for measuring a conveyance amount of the shape steel;
Conveyance amount of the shape steel measured by the conveyance amount measuring means, a crop width S of the shape steel continuously measured by the crop width measuring means, and a material width of the shape steel continuously measured by the material width measuring means. The S / W at each position in the longitudinal direction of the crop is calculated from W, and the calculated S / W and the crop of the optimal crop cutting position that is stored in advance and determined for each type of shape steel is stored. An optimum cutting position detection device for a shape steel crop, comprising: an optimum cutting position calculation means for calculating an optimum cutting position by comparing and calculating the optimum ratio s / w of the width s and the material width w. A crop height measuring means for continuously measuring the crop height of the shape steel, and a material height measuring means for continuously measuring the regular height of the shape steel;
A conveyance amount measuring means for measuring a conveyance amount of the shape steel;
The shape steel measured by the conveying height measuring means, the crop height Sh of the shape steel continuously measured by the crop height measuring means, and the shape steel continuously measured by the material height measuring means. The Sh / Wh at each position in the longitudinal direction of the crop is calculated from the material height Wh, and the calculated Sh / Wh and the optimal crop that is stored and stored in advance for each section type An optimum cutting position detection device for a shape steel crop, comprising: an optimum cutting position calculation means for calculating an optimum cutting position by comparing and calculating the crop height sh of the cutting position and the optimum ratio sh / wh of the material height wh.

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