JP4050897B2 - Steel material tracking method and apparatus in continuous rolling - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steel tracking method and apparatus in continuous rolling of steel materials in which steel materials such as slabs, blooms, billets, etc. are joined and rolled continuously. In particular, the present invention greatly improves the existing tracking system for normal rolling. The present invention relates to a method and an apparatus that enable tracking to a steel material unit of a continuously rolled material without remodeling.
[0002]
[Prior art]
When hot-rolling steel materials such as slabs, blooms, billets, etc., quality information (steel material standards, identification numbers, operating conditions, operation results, quality results, etc.) and hot-rolling from the viewpoint of quality assurance The quality information inside is linked one-to-one with the product after hot rolling. In normal rolling, a steel material having a predetermined length is individually rolled with each strand. Therefore, the leading edge and the trailing edge of the material to be rolled are detected at necessary points, and the material to be rolled is 1 from the start to the end of hot rolling. It becomes necessary to track every product.
[0003]
FIG. 1 is a diagram for explaining the tracking of the leading end in normal wire rolling.
[0004]
As shown in FIG. 1, in normal wire rod rolling, a billet, which is a rolled material heated in a heating furnace 1, is rolled in the order of a rough rolling mill 2, an intermediate rolling mill 3, and a finishing rolling mill 4, and a winder 5 (laying). A ring is formed by a head), conveyed to a converging tab 6 by a conveyor, and converged to form a wire coil.
[0005]
The tracking system for the leading end of the rolled material in this wire rolling is an optical or mechanical leading end detection on the entry side of each of the roughing mill 2, the intermediate rolling mill 3, the winder 5 and the focusing tab 6. Sensors (A, B, C, D) are installed, and the detected value that is detected by sequentially tracking until it is unloaded from the rolling line by the leading edge detection sensor is input to the tracking system computer 7 as a leading edge passing signal. And knows the position of the leading edge. Data collection on the rolled material is measured for each steel material by a data collection device 8 such as a dimension meter in accordance with an instruction from a tracking system computer.
[0006]
However, recently, the rolling speed has been increased, and for the purpose of quality, yield, production basic unit, production improvement, etc., on the entry side of the rolling mill, the leading end of the preceding rolling material and the leading end of the following rolling material Are continuously joined and rolled continuously. According to this continuous rolling method, the occurrence of trimming loss at the leading and trailing ends of the rolled material and misrolling at the leading end of the rolled material that occurs in conventional normal rolling is greatly improved, and there is little excess variation over the entire length of the rolled material and it is uniform. It has the feature that it can obtain a product of high quality.
[0007]
FIG. 2 is a diagram for explaining an outline of a steel tracking system in conventional continuous rolling.
[0008]
As shown in FIG. 2, in the continuous rolling of the wire rod, the billet heated in the heating furnace 1 is joined sequentially by the joining machine 9 such as a running welder to the tail end of the preceding billet and the tip of the subsequent billet. Then, the rolling mill 2, the intermediate rolling mill 3, and the finishing rolling mill 4 are rolled in this order, made into a ring shape by a winder 5, conveyed to a converging tab 6 by a conveyor, and converged to form a wire coil. In the continuous rolling method, since the rolled materials are joined and rolled sequentially by welding, the rolling is performed in a state where there is no tip and tail end for each rolled material. For this reason, each of the leading edge detection sensors (B to E) cannot detect the leading edge, so that it is possible to change to another detection method that does not use a conventional sensor or to detect the leading edge before joining. From the leading end passage signal from the sensor A, the following junction passage time was predicted and tracking was unavoidable. In any case, continuous rolling could not be tracked with the conventional normal rolling equipment, and it was necessary to remodel the equipment related to the conventional tracking system computer or introduce new equipment. .
[0009]
As a known tracking method in continuous rolling, for example, (1) a method of detecting some markings on the joint portion of the material to be rolled and detecting this, for example, changing the shape such as the step or the plate width, There are a method of detecting with a rolling load meter, etc., a method of detecting with a temperature sensor and a CCD camera with a temperature deviation, or a method of detecting with a flaw detector etc. with a foreign object or a flaw. 2) A method of sequentially calculating the moving speed of the material to be rolled and predicting tracking based on this, for example, as disclosed in Japanese Patent Laid-Open No. 10-34212, the joint of the material to be rolled in each stand (after the front billet) End) is calculated by a pulse transmitter attached to each stand, the amount of feed from the stand is obtained, and the joint is tracked based on the amount of feed Yes, and (3) a method of predictive tracking based on the latest moving time of continuous rolling, for example, as disclosed in JP 2000-51942 A, the leading edge of continuous rolling moves between sensors. There is a method in which the time to be recorded is stored and tracking is performed by predicting that the subsequent joint moves in the same time.
[0010]
However, the joint tracking methods disclosed in (1) to (3) above require a significant remodeling of the existing tracking system and a large amount of cost in order to put any method into practical use. There is the present condition that.
[0011]
[Problems to be solved by the invention]
Accordingly, in view of the above situation, the present invention is a steel material tracking method that can be applied to a tracking system in continuous rolling without significantly remodeling the existing tracking system used in normal rolling, and its It is an object of the present invention to provide an apparatus.
[0012]
[Means for Solving the Problems]
In continuous rolling, there is no leading edge due to the joining of the rolled material, so the existing leading edge detection sensor in normal rolling cannot be used, and the existing tracking system using the leading edge detection sensor cannot be used. It becomes. The present inventor has studied a tracking method and apparatus that can use an existing tracking system in normal rolling as it is even during continuous rolling.
[0013]
As a result, the position of the joint part of the rolled material is grasped by the conventional technology, and the dummy signal as if the leading end is detected at the timing when the joint part comes to the position of the existing tracking sensor. It was found that if it was sent to a computer, it would be possible to divert the existing tracking system without significantly modifying it by simply installing a device that generates a dummy signal.
[0014]
The present invention has been completed based on the above findings, and the gist of the present invention is as follows.
[0015]
(1) Rolling during continuous rolling by joining steel materials such as slabs, blooms, billets, etc., using a rolling line in which an optical or mechanical leading edge detection sensor used for tracking steel materials is arranged In the method of tracking in the line, the leading end detection sensor arranged on the joining machine entry side detects the leading end passing signal of the rolled material before joining, and from the leading end passing signal, Predicting the time for the joint to pass through the downstream leading edge detection sensor, and based on the joint passing time, optical or mechanical leading edge detection used for tracking the steel material placed in the rolling line At the timing when the joint comes to the position of the sensor, a tracking system generates a dummy signal as if the leading edge of the steel material was detected from the dummy signal generator instead of the leading edge detection sensor. A method for tracking steel in continuous rolling, characterized in that it is transmitted to a computer.
[0019]
( 2 ) Rolling during continuous rolling of steel materials such as slabs, blooms, billets, etc., using a rolling line in which an optical or mechanical leading edge detection sensor used for tracking steel materials is placed In the apparatus for tracking the inside of a line, it is provided with a leading end detection sensor arranged on the joining machine input side for detecting a leading end passing signal of the rolled material before joining, and the leading end from the leading end detection sensor Based on the passing signal, the time for the joint to pass through the leading edge detection sensor installed downstream from the joining machine is predicted, and based on the joint passage time, the steel material arranged in the rolling line is tracked. At the timing when the joint comes to the position of the optical or mechanical tip detection sensor used, a dummy signal is sent to the tracking system computer instead of the tip detection sensor. Steel of the tracking device in continuous rolling, characterized in that it has established a dummy signal generator for transmitting to the coater.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
[0024]
FIG. 3 is a diagram showing an outline of a tracking system in continuous rolling of the wire rod according to the present invention.
[0025]
As shown in FIG. 3, the rolled material such as billet extracted from the heating furnace 1 sequentially connects the tail end of the preceding rolled material and the tip of the subsequent rolled material by a joining machine 9 such as a running welder. Join. Subsequently, the joined rolled material is continuously rolled by a roughing mill 2, an intermediate rolling mill 3, and a finishing rolling mill 4 to form a wire, and a winding machine (laying head) 5 forms a ring shape to a predetermined position on the conveyor. Then, the wire rod is divided into a predetermined length by the tab shear in the converging tab 6 and converged to form a wire coil.
[0026]
Existing leading edge detection sensors A to E used in normal rolling are arranged on the entry side of the joining machine 9, the roughing mill 2, the intermediate rolling mill 3, the winder 5 and the converging tab 6, respectively. In rolling, the leading edge detection sensors B to E do not function.
[0027]
As a tracking system for continuous rolling, a leading end passage signal A of each rolled material before joining is obtained by a leading end detection sensor A arranged on the joining machine entrance side.
[0028]
However, each of the existing leading edge detection sensors B to E detects the leading edge of each rolled material and detects the leading edge passing signal of each rolled material because the rolled material is joined in continuous rolling. It cannot be emitted.
[0029]
In the present invention, the subsequent junction passage time is predicted from the leading end passage signal A before joining, and at the timing when the joining portion reaches each leading end detection sensor (B to E) position, the dummy signal generator 10 transmits a dummy signal (B ′ to E ′) in place of each leading edge detection sensor.
[0030]
A known method can be arbitrarily employed for the joint passage time. For example, the speed of the rolled material is detected and the passage time of the joint is predicted in advance based on this, or the roll rotation pulse is measured and the passage time of the joint is predicted in advance based on this. For example, the junction passage time can be predicted.
[0031]
That is, if the leading end passage signal A of each rolled material before joining is detected, the timing at which the leading end of the rolled material passes the position of the subsequent trailing end detection sensors (B to E) is predicted. Can do. Moreover, the data collection about a rolled material is measured for every steel material by the data collection apparatus 8, such as a dimension meter, by the instruction | indication from a tracking system computer. This is the same as in the case of normal rolling.
[0032]
As the dummy signal generator, it is preferable to use a general-purpose computer or the like at a low cost. Dummy leading edge passing signals (dummy signals B ′ to E ′) transmitted at the timing when the leading edge of the rolled material comes to the position of each sensor (B to E) by the dummy signal generator 10 are the existing tracking and It is sent to the system computer as usual, and steel can be tracked.
[0033]
That is, when the wire joint is divided by the tab shear in the converging tab 6, the tracking system computer 7 sends the wire division instruction to the tab shear installed on the converging tab 6 as before, and joins the wire division. Can be done in part. Alternatively, it is possible to perform control to change the roll gap of the rolling mill from the setting value of the preceding material to the setting value of the following material by the tracking system.
[0034]
In the tracking system, as a countermeasure against chattering (instantaneous OFF malfunction) of the leading edge detection sensor, the detection signal is tracked if the sensor OFF time is not longer than a certain time (for example, 0.01 to 0.1 seconds). The system computer may not be accepted. In addition, for the convenience of the data collection device, tracking / requiring a certain time (for example, 1 to 3 seconds) for data summarization and transmission after the data collection of the preceding material is finished and the data collection of the following material is started. There is a system. In such a tracking system, it is indispensable in the system to provide a dummy signal at the leading end with an interval of a certain time or more. Therefore, in the present invention, a dummy signal can be transmitted at a fixed interval essential to the system by a dummy signal transmitter as required.
[0035]
In addition, although continuous rolling of a wire was demonstrated in FIG. 3, this invention is applicable similarly to continuous rolling of a shape steel, a steel plate, etc.
[0036]
According to the present invention, by newly installing a dummy signal generator in the existing tracking system in normal rolling, it can be used as a tracking system for continuous rolling without significantly modifying the existing tracking system, The continuous rolled material can be tracked in units of raw materials (slabs, blooms, billets, etc.).
[0037]
【The invention's effect】
According to the present invention, it is possible to provide a continuous rolling tracking system without significantly remodeling the tracking system used in normal rolling, and it is possible to perform tracking in units of steel in continuous rolling. Has an effect.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining tracking of a leading edge in normal wire rod rolling.
FIG. 2 is a diagram for explaining the outline of a steel tracking system in conventional continuous rolling.
FIG. 3 is a diagram showing an outline of a tracking system in continuous rolling of a wire rod according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heating furnace 2 Rough rolling mill 3 Intermediate rolling mill 4 Finish rolling mill 5 Winding machine 6 Focusing tab 7 Tracking system computer 8 Data collection device 9 Joining machine 10 Dummy signal generators A to E Lead end detection sensor B ′ ~ E 'dummy signal

Claims (2)

Using a rolling line with an optical or mechanical leading and trailing edge detection sensor used for steel tracking, the inside of the rolling line when steel materials such as slabs, blooms and billets are joined and rolled continuously In the tracking method, the leading end detection signal of the rolled material before joining is detected by the leading end detection sensor arranged on the joining machine entry side, and the downstream side of the joining machine is detected from the leading end passage signal. The time at which the joint passes through the leading edge detection sensor arranged in the rolling line is predicted, and the leading edge is detected at the timing when the joint comes to the position of the leading edge detection sensor based on the joint passage time. For continuous rolling characterized by sending a dummy signal to the tracking system computer as if the leading edge of the steel material was detected from a dummy signal generator instead of a detection sensor Tracking method of kicking steel. Using a rolling line with an optical or mechanical leading and trailing edge detection sensor used for steel tracking, the inside of the rolling line when steel materials such as slabs, blooms and billets are joined and rolled continuously In the apparatus for tracking, it is provided with a leading end detection sensor arranged on the joining machine input side for detecting a leading end passing signal of the rolled material before joining, and by a leading end passing signal from the leading end detection sensor , Predicting the time for the joint to pass through the leading edge detection sensor disposed in the rolling line downstream from the joining machine, and detecting the leading edge disposed in the rolling line based on the joint passage time A dummy signal generator was installed to send a dummy signal to the tracking system computer instead of the leading edge detection sensor at the timing when the joint came to the sensor position. Steel of the tracking device in continuous rolling, characterized and.

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