JPS5930422A - Pinch roll device for down coiler - Google Patents

Abstract

PURPOSE:To prevent a steel strip take-up device from damaging owing to the impact of the front end of a steel strip by correcting the shape of the front end of the steel strip by a pinch roll at an upstream side of a down coiler when winding the thick steel strip around the down coiler. CONSTITUTION:When the thick steel plate S having the deformed front end is wound around the down coiler D, it strikes an upper pinch roll 1 facing a lower pinch roll 11 at the upstream side of the coiler D. The press-contacting impact is absorbed by the spring 32 of a shock absorber 3 fitted to the roll frame 2 of the upper pinch roll 1 and the spring 32 is compressed; and the roll frame 2 rocks upward to move the pinch roll 1 up away, preventing the application of a large impact. This impact is detected by the load cell 33, which sends a signal to a controller 5 to sends an operation command to a cylinder 4; the front end of the steel strip is pressed down forcibly with the pressed-down roll frame 2 under hydraulic pressure to correct the shape defect, and then the plate is sent and wound around the down coiler D. Thus, a device such as the pinch roll is prevented from damaging owing to the impact resulting from the shape defect of the front end of the steel strip.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pinch roll device for guiding mainly a thick copper strip to a down coin for winding up rolling charges.

Thick steel strips with high toughness and tensile strength required for line pipes are produced by low-temperature rolling, which makes the shape of the top of the steel strip unstable, causing damage to winding equipment and extremely deteriorating coil shape. In some cases, it may not be possible to wind the coin with a normal down coin.

Normally, when modifying the top shape of a coiled steel strip, a pinch roll located upstream of the coin is used to bend the coil to facilitate winding. In order to prevent the entire machine from being damaged by the impact, an air cylinder with a shock absorbing function is used instead of a hydraulic cylinder. Therefore, there was no ability to straighten the shape of materials such as high tensile strength steel, and the roll () merely escaped upward to protect the device, as shown in Figure 1.

Conventionally, when modifying the top shape of thick steel strips, etc.,
It was customary to manually shape the material over a long period of time without relying on pinch rolls.

In addition, there are some bugle rolls for down coins that use a hydraulic structure to correct their shape, but the impact when biting is extremely large, causing severe damage to the equipment [7] and making repairs difficult. was there.

The purpose of the present invention is to deal with such shortcomings in the prior art, and to provide a method for automatically switching the appropriate rolling state for shape correction and for guiding the tool through the sheet. It is possible to obtain a pinch roll structure that can be provided.

In the vinyl roll of the present invention, when the top of the steel strip S with a defective shape arrives, as shown in FIG.
escapes upward and buffers the impact on the device, but immediately after that, a strong rolling blade with no elastic force is applied to the roll, and the roll 11 presses the top of the steel strip S strongly as shown in Figure 2. - to correct the shape. When the top of the material is wound around 1 to 5 turns by the down coiler I, the strong pressure is released, and the buffer function as shown in Fig. It was designed to be guided by a steel belt.

Hereinafter, the structure of the apparatus of the present invention will be specifically explained with reference to FIGS. 4 and 5. In a pinch roll with one vertical position and one vertical position, the upper pinch roll (hereinafter referred to as roll 1) is supported by a roll frame 2 that can swing vertically around a fulcrum 21. The gap with the pinch roll 11 can be changed.

A shock absorber 6 is directly connected to the swinging end of the roll frame 2, and a liquid versiling 4 for rolling down is connected through the shock absorber.

Inside the housing 60 of the shock absorber 6 is a cylinder 40.
A slider roller 1 fixed to the tip of the rod is engaged, and a compression spring roller 2 is interposed between the slider 61 and the bottom surface of the housing 60. A load cell 63 is provided on the upper part of the housing 30, and this load cell
When a predetermined load condition acting on the hydraulic cylinder 4 is detected, a detection signal is sent to the control device w5, and the control device 5 issues a command to the hydraulic cylinder 4 to activate or deactivate it.

A primary reduction stage and a secondary reduction stage are set in advance in the control device 5. In the case of the first reduction stage, the hydraulic cylinder 4 is not operated and the elastic force is exerted only by the spring roller 2, and in the case of the second reduction stage, the elastic force is exerted only by the hydraulic pressure.
・Put it in a compressed state.

Next, the operation of this device will be explained. Initially, roll 1
The case is in the first rolling stage and is waiting for the arrival of the steel plate S. Eventually, as shown in Figure 4, when the top of the deformed material comes into contact with roll 1 (C 1), the pressure impact is absorbed by the spring. 2 absorbs 1
The roll frame 2 swings upward and releases the roll 1 in the negative direction. As a result, no large impact is applied to the pinch roll device as a whole.

Meanwhile, at this time, the load cell 6 detects this impact and issues a signal to the control device 5. As a result, the control unit 5 commands the cylinder 4 to operate, and the stage is switched to the secondary reduction stage shown in FIG. At this secondary rolling stage, the elastic force of the spring roller 2 is no longer present, and the slider 61 attracts the shock absorber 6 to pull down the roll frame 2. Therefore, the roll 1 strongly pushes the top of the steel strip. to correct any defects in the top shape.

The copper band whose top shape has been modified remains the same as the down coiler I.
] and wound up.

During this time, the roll 1 maintains the secondary rolling stage.

Eventually, when the steel strip has been wound 1 to 5 times around the down coiler D, a deactivation command is issued from the control device 5 to the hydraulic cylinder 4, and the process returns to the primary reduction stage and the elastic reduction state created by only the spring roller 2 is reproduced. be done.

In the above-mentioned embodiment, a hydraulic cylinder is used as a means for forming the secondary rolling stage, but a rolling mechanism using an electric motor may also be used. In addition, an air cylinder may be used.Furthermore, as a means for detecting the passage of the top of the material, in addition to a load cell, a 1.1M+) may be installed in front of the pinch roll, or a means for detecting the passage of the material by changes in the pinch roll motor current. may also be used.

As described above, according to the one-inch roll device of the present invention, the roll-down correction function is provided only when the shape of the top of the copper strip needs to be corrected, and during other normal winding operations, the winding is performed using the elastic (E) mechanism. Since guidance can be performed, it is effective for winding high-strength materials such as thick steel strips and high-strength steel strips, and can prevent damage to the device due to impact and occurrence of miscoils.

[Brief explanation of drawings]

FIG. 1 to FIG. 6 are explanatory diagrams showing the operation of the apparatus of the present invention step by step. FIG. 4 and FIG. 5 are schematic explanatory diagrams partially showing a specific configuration of the device of the present invention in cross section. FIG. 6 is a diagram showing the relationship between pressing force and relief armpit in the device of the present invention. 1: Upper pinch roll 2: Roll frame filter: Shock absorber 4: Hydraulic cylinder 5: Side leg device
S: Steel strip patent applicant Sumitomo Metal Industries, Ltd. (2 others)

Claims (1)

[Claims] a forced reduction device for an upper pinch roll using a hydraulic cylinder; a reduction blade relaxation device attached to the forced reduction device;
”0-docel for detecting the load on the nipinch roll;
The controller includes a control device that instructs a forced reduction device to perform a predetermined reduction in response to a value detected by the load cell, and at the same time as the upper pinch roll bites the top of the material, the pinch roll is forcibly reduced, so that the monthly yield top is wound around the mandrel. A pinch roll device for down coins, characterized in that the pinch roll device for down coins is configured to operate the rolling force buffering device at the time of arrival.