JPH02197308A - Device for detecting mis-rolling during rolling of wire rod - Google Patents

Abstract

PURPOSE:To promptly perform emergency operation by automatically detecting generation of mis-rolling and its generating position based on a detection signal of a wire rod detector detecting existence of a wire rod between respective rolling mills and operational conditions of a motor driving respective mills. CONSTITUTION:At the time of normal movement of a hot steel wire 1 between rolling mills 2-5, an intermediate mill 6, and a laying head 10, wire detectors 11-18 are in on-situation and driving motors 2a-6a of respective mills are in operational situation. When mis-rolling is generated between the mill 2 and mill 3, the hot wire 1 in the downstream side from that position is torn off and passes through the mills 4-6; the detectors 11-13 are turned on and the detectors 14-18 are turned off and a mis-rolling detector 19 informs generation of mis-rolling and its generating position. As fore mis-rolling caused by stop of a driving motor of mills, generation and generating position are also informed by the detector 19 to promptly perform emergency operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to 1. an apparatus for detecting misrolling of a wire rod during high-speed rolling of the wire rod;

[Prior Art] Generally, when manufacturing a wire rod by rolling, the rolling speed in the intermediate rolling process and the final rolling process is extremely high. Therefore, during rolling of wire rods, misrolling (material is not rolled properly during rolling from material to product, resulting in scrap) due to loop disturbance between rolling mills or stoppage of the rolling mill drive motor. When this occurs, a large amount of misrolled material becomes lumpy in front of the rolling rolls.

Conventionally, such misrolls are detected by visual inspection by an operator stationed near the rolling equipment, and when the operator recognizes a misroll, he or she takes emergency treatment to prevent a large amount of misrolled material from occurring. There is.

[Problems to be Solved by the Invention] However, as mentioned above, the conventional means for detecting misrolls during wire rod rolling is entirely dependent on the operator, but since the rolling speed is extremely fast, the operator cannot carry out emergency treatment operations after recognizing misrolls. Even if this is done, it is difficult to prevent the occurrence of a large amount of misrolled material. This misrolled material may also reach the work passage or work floor near the site where it occurs, posing a threat to the safety of workers and potentially damaging equipment.

Despite the potential for such a situation, detection of misrolls still relies entirely on the operator, who must avoid passing near the wire rolling equipment as much as possible, or
Alternatively, they took passive measures to prepare for the worst case scenario, always keeping in mind the possibility of a misroll when passing through the first pass. Therefore, it has been desired to be able to automatically detect misrolls.

The present invention has been made in view of this situation, and is designed to automatically and quickly detect misrolls.
It is an object of the present invention to provide a misroll detection device during wire rod rolling, which can immediately perform emergency treatment operations corresponding to misrolls when misrolls are detected, and improves safety near rolling equipment.

[Means for Solving the Problems] In order to achieve the above object, the misroll detection device during wire rod rolling of the present invention provides a wire rod detection device that detects the presence of the wire rod between a plurality of rolling mills that roll the wire rod. Misroll detection is provided with a detector and automatically detects occurrence of misroll of the wire rod and its occurrence position based on the detection signal from each of the wire rod detectors and the operating state of the motor that drives each of the rolling mills. It is characterized by having the means.

[Function] In the above-described misroll detection device during wire rod rolling of the present invention, each wire rod detector detects whether or not a wire exists between rolling mills, and the detection result and each rolling mill are Based on the operating state (stop/operation) of the drive motor, the misroll detection means automatically detects the occurrence of misroll of the wire and the position at which it occurs.

[Embodiment of the Invention] Hereinafter, a misroll detection device during wire rod rolling as an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is an overall configuration diagram thereof, and Fig. 2 is a flowchart for explaining its operation. , 3 and 4 are diagrams for explaining the operation of the apparatus of this embodiment.

In FIG. 1, 1 is a hot steel (wire rod), 2 to 5 are intermediate rolling mills that roll the hot steel 1, 28 to 5a are intermediate rolling mill drive motors that drive the intermediate rolling mills 2 to 5, respectively, and 6 is an intermediate rolling mill drive motor that drives the intermediate rolling mills 2 to 5, respectively. A finish rolling mill 6a is a finish rolling mill drive motor that drives the finishing mill 6, which performs finish rolling on the hot steel 1 that has been subjected to intermediate rolling by the intermediate rolling mills 2 to 5.

Further, 7 is a snap shear installed on the inlet side of each of the rolling mills 2 to 6, and each snap shirt is driven when a misroll occurs. By driving and shearing the hot steel 1, the hot steel 1 is prevented from entering the misrolled area. For example, if a misroll occurs in the third zone in FIG.
Activate Snapshot 7 on the four-person side.

Furthermore, 8 is an intermediate flying shear provided between the intermediate rolling mill 5 and the finishing rolling mill 6, and when a misroll occurs after the finishing rolling mill 6 (zone 5.6), the intermediate flying shear 8 The hot steel 1 from the intermediate rolling mills 2 to 5 is cut finely and dropped into the crop pit 9 through a continuous cutting operation, thereby preventing the hot steel 1 from entering the finishing rolling mill 6. In this case, none of the snap shears 7 on the 2- to 5-man side of the rolling mill are operated, and only the snap shear 7 on the 6-man side of the finishing rolling mill is operated.

Note that the operation commands for the snap shear 7 and the intermediate flying shear 8 are output in accordance with the detection results of a misroll detection section 19, which will be described later. Moreover, 10 is a laying head that takes in the hot steel (wire rod) 1 coming out of the finishing mill 6 at high speed.

In this embodiment, 11 to 18 are hot steel detectors (wire rod detectors) that detect the presence of hot steel 1, and hot steel detectors 11 and 12 are arranged on the entry side of intermediate rolling mill 2, Hot steel detectors 13 to 16 are arranged between the rolling mills 2 to 6, a hot steel detector 17 is arranged immediately after the exit side of the finishing rolling mill 6, and a hot steel detector 18 is arranged immediately before the rolling head 10. has been detected. In accordance with the arrangement positions of these hot steel detectors 12 to 18, in this embodiment, the first
.

Reference numeral 19 denotes a misroll that automatically detects the occurrence and position of misroll in the hot steel 1 based on the detection signals from the wire rod detectors 11 to 18 and the operating conditions of the motors 2a to 6a that drive the rolling mills 2 to 6. The misroll detection section 19 detects misrolls caused by loop disturbance between the rolling mills 2 to 6 according to the following misroll conditions and the flow shown in FIG.

In other words, if one piece of hot steel 1 is misrolled, it will be in a dango state (see Figure 3), so the hot steel 1 downstream of this part will be torn off and passed through the rolling mills 2 to 6. , the upstream side of the misrolled portion remains on the rolling line. At this time, the upstream hot steel detectors (11 to 17) at the location where the hot steel 1 remains are in the on state, and the downstream hot steel detectors (11 to 17) at the location where the hot steel 1 has passed are in the on state. vessel(
13 to 18) are in the off state. In such a state, the heat steel detectors 11 to 1 when the heat w41 is passing through normally.
This is an impossible pattern for the operation order of No. 8. Therefore, the conditions for occurrence of misroll due to tearing in each of the first to fourth zones and the sixth zone are as follows (note that there is no fifth zone for tearing detection).

1st zone: Heat steel detector 12.14 on and heat steel detector 13 off 2nd
Zone: Heat steel detector 13, 1.5 on and heat steel detector 14 off 3rd zone: Heat steel detector 14, 16 on and heat steel detector 15 off 4th
Zone: Heat steel detector 15.17 on and heat steel detector J6 off 6th
Zone: Hot steel detectors 16 and 18 are on and hot steel detector 17 is off. Also, misroll detection of the hot steel 1 due to the stopping of the rolling mill drive motors 2a to 6a is possible when the hot steel detector installed in front of the rolling mill is turned on. If the motor is stopped while the motor is in the on state (that is, the hot steel 1 is being rolled), it can be considered that a misroll has occurred. Therefore, the conditions for occurrence of misroll due to motor stoppage in each of the first to fifth zones are as follows.

], Zone: Heat Steel Detector 1 1. , 1. 2 on and motor 2a
2nd zone stopped: Heat steel detector 11.13 on and motor 3a stopped 3rd zone: Heat steel detector 11.14 turned on and motor 4a stopped 4th zone: Heat steel detector 11.15 turned on and motor 5a stopped Zone 5: The hot steel detector 11, 16 is on and the motor 6a is stopped. The misroll detection unit 19 detects the detection signals (on/off signals) from each wire detector 11 to 18 and the operating status (stop/operation) of the motors 2a to 6a. The occurrence of a misroll and its occurrence position are detected by determining whether or not the misroll signal (signal) satisfies the above misroll conditions according to the flow shown in FIG.

Misrolling of the hot steel 1 is detected as follows using the apparatus configured as described above. Rolling of the hot steel 1 is started, and the hot steel detectors 11 to 18 are sequentially turned on as the hot steel 1 passes through the rolling line. The moment when the hot steel 1 reaches the position of the hot steel detector 18 and the detector 18 is turned on is used as a trigger to start monitoring the occurrence of misroll in each zone. The tail end is a hot steel detector 11
Misroll detection is performed until the detector 11- is turned off after passing through the position.

Here, the fact that the hot steel detector 11 is on means that the hot steel 1 is definitely present on the intermediate rolling process line, which is one of the conditions for detecting misrolls. . Therefore, the misroll condition establishment determination steps S3, S5, S7, S9, Sll in FIG.
Before this, it is always determined whether the hot steel detector 11 is in the on state (steps 82, S4, S6, S8).
.

S10). This is because if the distance between the tail end of the hot steel 1 flowing first and the tip of the hot steel 1 flowing next is narrow as shown in Figure 4, misrolls may occur due to tearing as shown in Figure 3. The situation is similar to the case where the misroll occurs, and the detection results of the hot steel detectors 11 to 18 satisfy the above-mentioned misroll condition.

This is to prevent false detection. For example, as shown in FIG. 4, the tail end of the hot steel 1 flowing first is the hot steel detector 15.
When the tip of the next flowing hot steel 1 reaches the position of the hot steel detector 13 at the position shown in FIG. If so, it will be falsely detected and unnecessary misroll processing will be performed, so as mentioned above, the hot steel detector 11
The ON state of is the condition for misroll detection.

Now, the misroll condition establishment determination step S3 in FIG. S5. S7. S9. In Sll, it is determined whether or not the above-mentioned misroll condition is satisfied, and if it is determined that the condition is satisfied in each step, it is determined that a misroll has occurred in the first to fourth and sixth zones, and a misroll detection signal is sent. Steps 812 to 16) to output the misroll signal reset input (step 517), operate the snap shear 7 or the intermediate flying shear 8 to perform processing corresponding to the misroll, and then the hot steel 1 will enter. to prevent

In this way, according to the device of this embodiment, each hot steel detector 1
1 to 18 detect the presence or absence of hot steel 1 between the rolling mills 2 to 6, and detect the detection result and the rolling mill drive motors 2a to 6.
Based on the stop/operation state of a, the misroll detection unit 19
Since the occurrence of misrolls in hot steel 1 and its location can be detected automatically and quickly, emergency treatment operations can be carried out immediately in response to misrolls when misrolls are detected, greatly improving safety near rolling equipment. It is.

[Effects of the Invention] As described in detail above, according to the misroll detection device during wire rod rolling of the present invention, the presence or absence of wire between rolling mills detected by each wire rod detector and the rotation of the rolling mill drive motor can be detected. Stop/
Based on the operating status, the misroll detection means is configured to automatically and quickly detect the occurrence of misrolls in wire rods and the position where they occur, so that when misrolls are detected, emergency treatment operations can be performed immediately in response to misrolls.
This has the effect of significantly improving safety near rolling equipment.

Effects can be obtained.

[Brief explanation of the drawing]

1 to 4 show a misroll detection device during wire rod rolling as an embodiment of the present invention. FIG. 1 is an overall configuration diagram thereof, FIG. 2 is a flowchart for explaining its operation, and FIG. , 4 are diagrams for explaining the operation of the apparatus of this embodiment. In the figure, 1.--Hot steel (wire rod), 2-5.. Intermediate rolling mill, 28-5 a- = Intermediate rolling mill drive motor,
6... Finish rolling machine, 6a... Finish rolling machine driving motor, 7... Snap shear, 8... Intermediate flying shear, 9... Crop bit, 10... - Laying head, 11 ~18...Heat steel detector (wire rod detector)
, 19-... Misroll detection section. Figure 3 Figure 4

Claims (1)

[Claims] A wire rod detector for detecting the presence of the wire rod is provided between each of the plurality of rolling mills that roll the wire rod, and a detection signal from each of the wire rod detectors and a motor for driving each of the rolling mills are provided. A misroll detection device during wire rod rolling, comprising a misroll detection means that automatically detects the occurrence and position of misroll in the wire based on operating conditions.