JPS6240928A - Meandering preventing device for rolling material - Google Patents

Abstract

PURPOSE:To prevent meandering of a rolling material by inserting and holding the rolling material between a pinch roller which is turned by a cylinder, and a looper, and giving a back tension, when the rolling material has been detached from a rolling mill of the upstream side, in two sets of rolling mills. CONSTITUTION:When a rolling material 1 is detached from a rolling mill 2, a load signal of a load cell 8 becomes off. A cylinder 7 pushes downward an arm 6 and makes a pinch roller 5 abut on the rolling material 1, inserts and holds the rolling material 1 together with a looper 4, and gives a back tension. In this state, when a difference of right and left loads of the rolling material 1 is detected, meandering of the rear end of the time when a tail of the rolling material 1 has come off can be prevented.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a meandering prevention device for rolled material, and in particular, to a device for preventing meandering when removing ash from the rear end of a rolled material in hot strip steel finishing rolling equipment. The present invention relates to a meandering prevention device for rolled material suitable for.

[Background of the invention]

When hot finish rolling a steel strip or the like using a rolling mill, the rolled material may meander on the rolling mill. As a means for preventing the meandering of the rolled material, Japanese Patent Application Laid-Open No. 59-450
As disclosed in No. 11, a method is known in which a load difference between the left and right sides of a rolled material is detected and the meandering of the rolled material is prevented according to this load difference.

This method is effective when there is tension in the rolled material, but
If no tension is applied to the rolled material, such as when the tip of the rolled material gets caught or the ash is removed from the rear end, the rolled material may be lifted up or squeezed (as in the case of ash removal from the rear end), and the difference in load between the left and right sides. There was a problem in that it was difficult to detect meandering and it was impossible to prevent meandering.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and its purpose is to prevent the meandering of the rolled material when the rolled material is removed from the rolling mill by removing ash from the rear end. To provide a prevention device.

[Summary of the invention]

In the present invention, a pinch roller is provided at a position facing a looper provided between rolling mills with the rolled material interposed therebetween, and the pinch roller is actuated by a cylinder so that the rolled material can be pressed together with the looper or removed. , this cylinder is actuated by a detection means for detecting whether the rolled material is caught in the rolling mill or released, and when the rolled material leaves the upstream rolling mill, it is rolled by the pinch rollers. The desired purpose is achieved by pressing the material against the looper and applying backward tension.

[Embodiments of the invention]

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the meandering prevention device for rolled material according to the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. Among the plurality of rolling mills installed in the traveling direction of the rolled material 1, the adjacent rolling mill 2
, 3 is provided with a looper 4 for guiding the rolled material 1, and pushes the rolled material 1 upward. This looper 4
A pinch roller 5 for pinching the rolled material 1 with the looper 4 is provided at a position facing the rolled material 1 with the looper 4 in between. It is rotatably supported by a shaft-supported arm 6, and this arm 6 is rotated by a cylinder 7, so that the pinch roller 5 can pinch or remove the rolled material 1 together with the looper 4. This cylinder 7 is the rolling mill 2
．． 3, it is configured to operate via a control device (not shown) in response to a signal from a load cell 8 provided on a roll of the rolling mill 2 on the upstream side of the flow of the rolled material 1.

The operation of this embodiment configured as described above will be described below. Two rolling mills 2 with rolling material 1 adjacent to each other,
3, a load signal is input to the load cell 8 provided in the rolling mill 2, and if this load signal is received by a person, the cylinder 7 is sent to the arm 6 via a control device (not shown). , and the pinch roller 5 has been raised and separated from the rolled material 1. FIG. 1 shows this situation. As shown in FIG. 2, when the rolled material 1 separates from the rolling mill 2 and reaches the bottom, the load signal of the load cell 6 is turned off. At this time, the cylinder 7 pushes the arm 6 downward and the pinch roller 5 moves the rolled material. 1 and clamps the rolled material 1 together with the looper 4 to apply backward tension. In this state, the rolled material 1 is
meandering can be prevented. FIG. 3 is a time chart showing the above-mentioned operation.

According to this embodiment, when the rolled material 1 falls out of the rolling mill 2, the load signal of the load cell provided in the rolling mill 2 is turned off, and the cylinder 7 is operated to connect the pinch roller 5. Since the rolled material 1 is held between the looper 4 and the looper 4, backward tension is applied to the rolled material 1, and the load difference between the left and right sides of the rolled material 1 can be normally detected, thereby preventing the rolled material 1 from meandering. Can be done.

FIG. 4 is a hydraulic circuit diagram showing another embodiment of the present invention.
The cylinder 7 is a hydraulic cylinder, and a pressure control valve 9 is provided in the hydraulic circuit that operates the hydraulic cylinder 7, and the width, thickness, etc. of the rolled material 1 are remotely set in the control device in advance, and the set values are set. By opening and closing the pressure control valve 9 according to the pressure, the pressing pressure of the hydraulic cylinder 7 can be variably adjusted. According to this structure, rolled material 1
can provide the optimum rear tension for detecting the load difference between the left and right sides.

In the above-mentioned embodiment, the case where the means for detecting whether or not the rolled material 1 is caught in the rolling mill 2 is the load cell 8 provided in the rolling mill 2 has been described. Without limitation, rolled material 1
For example, a photoelectric type may be used to detect whether or not the roller is located on the downstream side immediately after the rolling mill 2.

〔Effect of the invention〕

As described above, according to the present invention, the pinch roller is provided at a position facing the louver provided between the rolling mills, and when the rolled material leaves the rolling mill, the cylinder connected to the pinch roller is actuated. Since the rolled material is held between the louvers to apply backward tension, it is possible to prevent the trailing end from meandering when removing ash from the rolled material.

[Brief explanation of drawings]

1 and 2 are schematic configuration diagrams showing one embodiment of the meandering prevention device for rolled material according to the present invention, FIG. 3 is a time chart showing the operation of this embodiment, and FIG. FIG. 2 is a hydraulic circuit diagram showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Rolled material, 2, 3... Rolling machine, 4... Louver, 5... Pinch roller, 7... Cylinder, 8...
Load cell, 9...pressure control valve. Proxy Power Physician Small Moon 1 Win Male Eyebrow 1st Eye 20th Spit”-11 1°”″P, 1 Darkness ↓ Nkure 7

Claims (1)

[Scope of Claims] 1. In a rolling material meandering prevention device provided in a plurality of rolling mills arranged in the traveling direction of the rolled material, two adjacent rolling mills among the plurality of rolling mills are provided. a looper provided between the looper, a pinch roller provided to be able to pinch the rolled material together with the looper at a position facing the looper with the rolled material in between; A method for preventing meandering of a rolled material, comprising a cylinder for pressing or separating, and a detection means for detecting a state in which the rolled material is caught in or separated from the rolling mill, and the cylinder is actuated by the detection means. Device. 2. The device for preventing meandering of a rolled material according to claim 1, wherein the detection means is a load cell provided in the rolling mill. 3. Claim 1 or 2, wherein the cylinder is a hydraulic cylinder equipped with a pressure control valve.
A device for preventing meandering of rolled material as described in 2.