KR100762432B1 - Apparatus for correcting edge shape of steel sheet strip - Google Patents

Abstract

The present invention is a steel sheet prior to temper rolling so that pinch-tree, which is a major defect among the surface defects of the steel sheet, does not occur due to the poor shape of the edge portion of the steel sheet during temper rolling, which is a specific operation in the cold rolled steel sheet production process. The present invention relates to an apparatus for automatically correcting edge shape defects.

The present invention is provided with a base 10 at the lower end of the steel sheet, the operating roll 7 is installed on the upper end of the base 10 to be operated by the hydraulic cylinder 8, the other side on the base 10 A pair of connecting members 15 coupled to the ball screw 16 are configured to be moved in opposite directions by the rotational driving of the ball screw 16 connected to the motor 11, and the other end of the ball screw 16 A pulse generator (PLG) 22 is configured to control the movement of the connecting member 15, and on each of the connecting members 15, a control roll 9 operated by the hydraulic cylinder 20 is provided. Provides a device for correcting the shape defects of both edge portions of the steel sheet.

Description

Equipment for correcting shape defects at both edges of steel sheet {APPARATUS FOR CORRECTING EDGE SHAPE OF STEEL SHEET STRIP}

1 is a perspective view of a working state in which surface defects (overlapping defects) are caused by poor shape of both edge portions of a conventional steel sheet;

2 is a perspective view of a device according to the invention,

3 is an enlarged view of a portion “A” of FIG. 2;

4 is a perspective view of the state of use of the device according to the present invention;

5 is an operational flow chart of the apparatus according to the present invention.

* Name of code for main part of drawing

1: steel sheet (STRIP) 2: upper work roll 2 ': lower work roll

3: upper choke 3 ': lower choke 4: fixed cylinder

5: Choke Clamp 7: Operation Roll 8: Hydraulic Cylinder

9: control roll 10: base 11: motor

12: drive gear 13: driven gear 14: connecting belt

15 connection member 16 ball screw 17 bush (BUSH)

18: LM GUIDE 19: Fixture 20: Hydraulic cylinder

21: Coupling 22: Pulse Generator (PLG)                 

23: TOUCH-BAR 24: Light sensor

25 plate 30 straightening device 31 overlapping flaw

The present invention is to prevent the occurrence of the pinch-tree, which is a major defect among the surface defects of the steel sheet due to the shape defects of the EDGE portion of the steel sheet during the controlled rolling, which is a specific operation in the cold rolled steel sheet (STRIP) production process The present invention relates to a device for automatically correcting shape defects at both edges of a steel sheet before temper rolling.

In the production process of cold rolled steel sheet, the demand for the final finished products and high value-added coil products is temper-rolled by the order material, which is a specific work to give the surface of the steel sheet to be rough and refine the shape. However, when tempered rolling a steel sheet having a severe wave shape (WAVE) on both edge portions of the steel sheet before temper rolling, a significant defect of overlapping the edge portions of the steel sheet is generated. It is to provide a device for correcting the shape defects of both the steel sheet edge portion that can contribute to the productivity and quality improvement by preventing the overlapping defects that are fatal defects of the steel sheet edge portion by effectively correcting the.

In general, the annealing of the steel sheet in the cold rolling process of the steel mill makes the steel sheet thickness almost unchanged by the demand of the customer. In order to produce the product by temper rolling, it is necessary to clean the shape of both edges of the steel sheet during the temper rolling work, and there is no wave so that the normal work can be performed and the product can be produced with a beautiful surface. However, when the steel sheet having poor shape of both edges is temper-rolled, overlapping defects, which are major defects, are generated and the quality is degraded, and the overlapping defects are transferred to the work roll to cause print marks. Since it is impossible to produce the product, it is necessary to prepare and replace a new work roll, which requires excessive time and manpower.

Conventionally, the temperature is raised in a furnace to correct the shape defect of the steel sheet edge due to heat, and the line speed is reduced in the cab before temper rolling, and the operator checks the shape of both edge portions of the steel sheet. I contacted and worked on it. However, this work is caused by poor hardness due to the rise in the furnace temperature, which is a factor of claim filing, productivity decreases due to the decrease of the line speed, and it is necessary to check the shape defects of both edges of the steel sheet before and during the line operation. There is a risk of a safety accident.

Accordingly, the present invention is to solve the conventional problems as described above, by efficiently correcting the shape of both edges of the steel sheet before performing temper rolling in the production of cold rolled steel sheet to prevent the occurrence of overlapping on the surface of the steel sheet An object of the present invention is to provide a device for correcting shape defects at both edges of steel sheets that can improve quality and productivity and prevent safety accidents.

The present invention for achieving the above object is an apparatus for correcting the shape defects (wave) of both steel sheet to straighten the shape defects (waves) generated on both edges of the steel sheet before the temper rolling, the base having a base on the lower end of the steel sheet proceeds The tip is installed to be operated by this hydraulic cylinder, and on the other side of the base, the bush (BUSH) is interrupted to move in opposite directions on the LM GUIDE line by the rotation of the ball screw connected to the motor. It is equipped with a plurality of connecting members are coupled to the ball screw through the ball screw, the other end of the ball screw can control the movement of the plurality of connecting members installed integrally with a plurality of shape correction control roll to the edge of the steel sheet The pulse generator (PLG) is configured so that the plurality of control rolls on the upper surface of the plurality of connecting members It is installed in connection with each hydraulic cylinder, and provides a device configured by installing a plurality of optical sensors for adjusting the position of the control roll in the spaced apart position of each hydraulic cylinder.

The optical sensor is provided so as to control the position of the control roll in four stages by thickness, material, and tension value when the steel sheet is defective.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

As illustrated in FIGS. 2 to 4, the apparatus for correcting the shape misalignment of both edge portions of the steel sheet according to the present invention has a bottom portion where the steel sheet 1 advances to an appropriate position in front of the upper and lower work rolls 2 and 2 'of temper rolling. Equipped with a base 10, the operating roll 7 which is operated up and down by the hydraulic cylinder (8) at the top end of the base 10 is configured, and the motor (11) at the top surface stop of the base (10) The drive gear 12 and the driven gear 13 are provided by the connecting belt 14 so that the driving gear 12 and the driven gear 13 are rotated in the forward and reverse directions by the driving of the drive shaft, and the ball screws 16 connected to the coupling 21 are both ends thereof. The support 19 is installed and supported, and the EL guides 18 are fixedly installed at both ends of the ball screw 16. The LM guide 18 serves to guide the smooth movement of the plurality of connecting members 15 along the ballscrew 16 and to hold the center of gravity.

The ball screw 16 has a bushing 17 to the middle so that the motor 11 is moved in the opposite direction at the time of the forward and reverse rotation driving, the connecting member 15 is respectively coupled to both sides of the ball screw, the ball At the other end of the screw 16, a pulse generator 22 is provided to control the movement of the connecting member 15 which is moved on the ball screw 16. In the center of the upper surface of each of the connecting members 15 is installed so that the control roller 9 for shape correction can be operated up and down by the hydraulic cylinder 20, the front end of the rod (ROD) of the hydraulic cylinder (20) A touch bar (TOUCH-BAR) 23 detected by an optical sensor 24 is installed at a proper position, and the control roll (D) is detected by detecting the touch bar 23 at a position spaced apart from the hydraulic cylinder 20. A plurality of optical sensors 24 for controlling the position of 9 are fixedly installed on the connection plate 25. The plurality of optical sensors 24 are disposed at an appropriate distance in the vertical direction to the connection plate 25, the thickness and the material of the steel sheet 1 is a shape defect when both edge portions of the steel sheet (1) By subdividing by the tension value, it is configured to control the position of the control roll 9 in four steps of A, B, C, D (see Fig. 3).

Referring to the operation of the steel sheet both edge portion poor shape correction device 30 of the present invention configured as described above are as follows.

If the shape of both edges of the steel sheet 1 in progress through the annealing process is poor, the exiting worker turns on the power of the calibration device 30 positioned before the upper and lower work rolls 2 and 2 'of temper rolling. ON). Then, the hydraulic cylinder (8) located at the tip of the base (10) is DOWN down to the set range and the operation roll (7) integrally connected thereto is pressed down on the upper surface of the steel sheet (1) to lower the height of the steel sheet being advanced. The tension is imparted in the width direction of the steel plate 1, and at the same time, the ball screw 16 is rotated by the forward rotation driving of the motor 11 on the other side of the base 10, and thus the ball screw 16 Connected to the control roll (9) and the hydraulic cylinder (20) integrally connected to the lower member of the shape of the steel sheet (1) while being guided by the LM guide 18 (width of the steel sheet width data) After transmitting to the pulse generator 22 to control the rotation operation of the motor 11), the forward rotation drive of the motor 11 is completed.

When the driver confirms that the connecting member 15 is moved to both edge portions of the steel sheet 1, the hydraulic cylinder 20 configured in the connecting member 15 is divided into four stages for each thickness, material, and tension value of the steel sheet 1. When operating the mode (A, B, C) to correct the shape defect in the operation mode set to the mode, the hydraulic cylinder 20 is the touch bar 23 installed on one side of the cylinder rod is a plurality of optical sensors 24 The cylinder rod is raised and stopped until it is detected by the set optical sensor (24).

On the other hand, the control roll 9 formed integrally with the rod end of the hydraulic cylinder 20 is in close contact with the bottom edge of the steel sheet (1), the shape of both edges are poor, and give tension to both edges as shown in FIG. Tension is applied to the steel sheet 1 in a form in which the operation roll 7 at the tip of the base 10 and the control roll 9 at the middle thereof are pulled in opposite directions so that the upper and lower work rolls 2 ( 2 ') by spreading the shape defects (waves) at both edges of the steel sheet at the previous position, the overlapping defect 31, which is a major defect of the steel sheet surface, is prevented.

On the other hand, when the steel plate as described above is completed in the two-sided bad shape correction operation is completed (OFF) the operation of the control roll (9) in the reverse order of operation order the hydraulic cylinder 20 is down and the touch bar installed on one side The operation stops while the 23 is detected by the optical sensor 24 in the 'D' position (home position), and then the motor 11 is driven backward so that the ball screw 16 is reversely reversed as described above. As the connecting member 15 located at the bottom portion is retracted, the touch bar 23 'positioned at one side of the connecting member 15 is detected by the optical sensor 24' positioned at the rear and returned to the initial state. The hydraulic cylinder 8 of the operation roll 7 is operated up to the set range, so that the operation roll 7 is spaced apart from the steel sheet 1 on which the operation roll 7 is finished, thereby completing the shape defect correction work of both steel sheets.

5 is a flowchart sequentially arranging a series of operations of the present invention.

According to the apparatus for correcting the shape defects of both edge parts of the steel sheet of the present invention as described above, due to the shape defects of both edge parts of the steel sheet during temper rolling, it prevents overlapping defects, which are the major defects among the surface defects of the steel sheet, thereby improving the quality and productivity, and conventionally the shape defect It is possible to prevent the safety accidents by eliminating the dangerous work that works while checking the effect can be obtained.

Claims (2)

The base 10 is provided at the lower end of the steel plate, and the operating roll 7 is installed at the upper end of the base 10 so as to be operated by the hydraulic cylinder 8, and the motor 11 is located on the other side of the base 10. A pair of connecting members 15 are coupled to the ball screw 16 so as to be moved in opposite directions by the rotational driving of the ball screw 16 connected to the), and the other end of the ball screw 16 is connected to the connection member. Pulse generator 22 is configured to control the movement of the (15), characterized in that the control roll (9) actuated by the hydraulic cylinder 20 is installed on each connection member (15) Device for correcting shape defects at both edges of steel sheet. The plate 25 of claim 1, wherein one side of each of the hydraulic cylinders 20 detects the touch bar 23 on the cylinder rod to control the position of the control roll 9. Installed on the optical sensor 24, when the shape of the steel sheet, the shape of the steel sheet, both edge portions, characterized in that configured to control the position of the control roll 9 in multiple stages by thickness, material, tension value Calibration device.

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