KR100797368B1 - An apparatus for adjusting roll gap of skin pass mill - Google Patents

Abstract

According to the present invention, in order to compensate for the inconsistency of the rolling roll diameter according to the rolling roll wear and polishing amount in the re-rolling work in the temper rolling mill, which is a re-rolling process for improving the quality of the hot rolled coil cooled to room temperature after the hot rolling winding, A roll spacing device for a temper mill, which is adapted to automate the calibration and compensation of rolling rolls by allowing the operator to automatically mount the support liner.

The present invention, in the device that automatically inserts and replaces the liner for compensating the roll gap according to the diameter wear of the rolling roll in the mini-pass hot rolling mill and blast furnace hot rolling mill equipment (Skin Pass Mill) equipment, the rolling roll is rotated Each support block is fixed to an upper surface of the backup roll choke to support the support roll, and a plurality of support liners having a plurality of lower surfaces are arranged for each backup roll choke to the upper side of the support block, respectively, by the driving cylinder to Positioned so as to be movable in the longitudinal direction, the pair of movable blocks that move in the same direction as the support liner on the upper side of the support liner to support the rear of the support liner is arranged to be movable by the drive motor and the screw shaft. Provided is a roll spacing device for a rolling mill.

Rolling Mill, Roll Diameter Wear, Roll Interval Compensation, Liner, Back-Up Roll Choke

Description

Roll gap adjusting device for temper rolling mill {AN APPARATUS FOR ADJUSTING ROLL GAP OF SKIN PASS MILL}

1 is a side view showing a configuration in which the roll spacing device according to the present invention is mounted on a temper rolling mill;

2 is an exploded perspective view showing a roll spacing device of the temper mill according to the present invention;

3 is a side view of the roll spacing device of the temper mill according to the present invention;

4 is a side view showing a roll spacing device of the temper mill according to the present invention;

5 is a cross-sectional view taken along the line A-A of FIG.

6 is a combined state of the fixed block and the moving block provided in the roll spacing device of the temper mill according to the present invention;

7 is an explanatory diagram showing a method of adjusting the roll spacing in the temper mill according to the prior art.

       <Description of the symbols for the main parts of the drawings>

5 ..... support block 7a, 7b .... fixing bracket

12 .... support liner 16 ..... guide rail

20 .... Connecting rod 25 ..... Driving cylinder

30 .... Moving block 32 ..... Fixed block                 

58 .... guide 62 ..... screw shaft

67 .... drive motor 69 ..... chain

75 ... belt 80 ... encoder

200 ... Rolling Mill 210 .... Rolling Mill

230 ... choke roll backup

The present invention relates to an apparatus for automatically inserting and replacing a roll support liner for compensating a roll gap according to a diameter wear of a rolling roll in a mini pass hot rolling mill and a blast furnace hot rolling mill. Specifically, in order to improve the quality of the hot rolled coil cooled to room temperature after hot rolling, the roll support suitable for the wear amount is compensated to compensate for the inconsistent rolling roll diameter according to the rolling roll wear and polishing amount in the re-rolling process. A roll spacing device for a temper mill, which is adapted to automate the calibration and compensation of rolling rolls by allowing the operator to automatically mount the liner.

As shown in FIG. 7, the conventional roll mill (SKIN PASS MILL) 200, when the rolling roll 210 is used for a long time and the diameter is reduced, these rolling rolls 210 from the rolling mill housing 215 Withdrawal, by adjusting the distance between the rolling rolls 210 by mounting a roll device liner 220 in accordance with the wear amount of the rolling rolls 210 to the backup roll choke 230 so that a constant distance between the rolling rolls 210 is maintained. Was.

However, the rolling roll 210 is not always worn to a constant diameter because the wear amount is not determined, and after regular replacement of the rolling roll 210, the diameter of the rolling roll 210 is measured manually, and then the rolling roll (210) to produce a roll gap compensation liner 220 according to the wear amount, the operator performs the mounting and replacement work at a height, and if the rough rolling mill 200 is in the rolling operation unavoidably stopped the rolling operation for a long time After, the liner 220 has been used to compensate for the gap between the rolling rolls 210.

However, in the related art, when an operator accidentally replaces a roll thickness liner 210 having a predetermined thickness during an operation of replacing the rolling roll 210, and incorrectly replaces the liner 210 having an incorrect thickness, the shape of the rolling strip during the rolling operation is changed. Since it becomes impossible to control, not only the rolling work is impossible, but also the situation that the control of the rolling roll gap interval is not possible, because the irregular replacement of the rolling roll 210 must be made, greatly reducing the work productivity.

In addition, since the liner 220 is to be replaced again to be mounted on the rolling roll 210, the replacement time of the rolling roll 210 used for the replacement also takes a considerable time, causing a reduction in rolling output.

In addition, when the operator replaces the rolling roll spacing adjusting liner 220, which is a heavy object, at the height of the worker, a fall accident occurs, and a safety accident occurs in the entire city of the liner 220, as a result of the operator. Due to the increased fatigue, the work of avoiding the replacement of the liner 220 is impossible and the rolling work cannot be performed on the rolling roll 210 in the best state. It has also been raised as an important cause of the deterioration of the surface quality of rolled products.

The present invention is to solve the conventional problems as described above, the object is to roll out the liner for adjusting the roll gap between the rolling roll worn in the temper rolling mill freely and easily from the rolling roll housing, It is to provide a roll spacing device for an improved temper rolling mill to improve the quality of the rolled product, and to improve the productivity of the rolling mill, and to prevent the safety accident of the operator by easily roll interval.

In order to achieve the above object, the present invention, by inserting and replacing the liner that compensates the roll gap in accordance with the diameter of the rolling roll in the skin mill (Skin Pass Mill) equipped in the mini mill hot rolling mill and blast furnace hot rolling mill In the giving device, the support block is fixed to the upper surface of the backup roll choke for supporting the rolling roll rotatably, and the plurality of support liners formed in multiple stages on the upper side of the support block are arranged for each backup roll choke. The driving cylinders are positioned to be movable in the longitudinal direction of the rolling roll, respectively, and a pair of moving blocks moving in the same direction as the support liner to support the rear side of the support liner is provided on the upper side of the support liner. Roll spacing adjustment of the temper mill, characterized by being arranged to be movable by the shaft The value of the maryeonham.

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

As shown in FIG. 1, the roll spacing adjusting device 1 of the temper mill according to the present invention has two squares formed on the upper surface of the upper backup roll choke 230 in the housing 215 of the rolling mill stand. Position the backup roll support blocks 5, respectively, and fix them with fixing bolts (not shown). The support brackets 7a and 7b are fixed and extended to the steel frame structure constituting the housing 215 of the rolling mill stand.

Then, between the upper side of the backup roll support block 5 and the rolling mill stand housing 215, respectively, the stage 12a at the lower surface so as to vary the thickness t corresponding to the diameter of the rolling roll 210, respectively. Forming a plurality of support liners 12 formed in a multi-stage to be arranged on each backup roll choke 230 side.

A plurality of rotatable bearing wheels 14 are inserted into both sides of each of the support liners 12, and both sides of the support liner 12 are rotatable cross-sections in which the bearing wheels 14 rotate and move in the inner passage 16a. Guide rails 16 are disposed on both sides and are fixed to the inside of the backup roll stand housing 215.

In addition, the plurality of support liners 12 are integrally connected to each other via a plurality of connecting rods 20 in the middle thereof, and each of the support liners 12 has a multi-stage structure at its lower surface with respect to its upper surface. The lower surface is to vary its thickness t for each stage 12a.

In addition, a driving cylinder 25 is provided at one side in order to move the plurality of support liners 12 in the longitudinal direction of the rolling roll 210, and the driving cylinder 25 is driven by power such as hydraulic pressure or pneumatic or electric force. It is a power cylinder (Power Cylinder) operated by the body, the body is fixed to one side bracket (7a) extending from the housing 215 of the rolling mill stand, the tip of the rod (25a) is the side of the one side support liner 12 The plurality of support liners 12 can be moved along the guide rail 16 by the operation of the drive cylinder 25 connected thereto.

In addition, the fixing block 32 is integrally mounted to the upper surface of each of the support liners 12 to guide the lower surface of the moving block 30 to be described later. As shown in FIG. 6, a bolt insertion hole 34 is formed in the inner surface to be fixed to the upper surface of the support liner 12 and fixed to the support liner 12 so as to be integrally mounted to the support liner 12. The surface forms a guide groove 40 in the longitudinal direction, and the wedge grooves 42 are formed at the lower end of the guide groove 40.

And, the movable block 30 is fitted into the guide groove 40 of the fixed block 32 to be slidable, for this purpose, the movable block 30 is the wedge groove of the fixed block 32 at its lower end ( Each of the wedge protrusions 52 corresponding to 42 is mounted to correspond to the fixed block 32, and guide grooves 54 are formed on both side surfaces of the movable block 30, respectively. A plurality of guides 58 having guide protrusions 56 into which the guides are inserted are positioned at both sides of the movable block 30, respectively, in the longitudinal direction of the rolling roll 210, that is, of the support liner 12. It extends in the same direction as the moving direction.

In addition, the movable block 30 is formed so that the screw shaft 62 is screwed through the center thereof, bearings 64 for rotatably supporting the screw shaft 62 to the screw shaft 62. A plurality of positions are supported on the inner side of the stand housing 215 and the bracket 7b to facilitate the rotation of the screw shaft 62.

And, one end of the screw shaft 62 is mounted to the sprocket 70 is connected to the drive motor 67 for forward and reverse rotation through the chain 69, the drive motor 67 is the body It is fixed to the inner surface of the stand housing 215, and the drive sprocket 67a is mounted on the rotary shaft to rotate the driven sprocket 70 of the screw shaft 62 forward and reverse through the chain 69, and consequently the screw. Through the rotation of the shaft 62, the moving blocks 30 all slide forward and backward simultaneously.

In addition, a circular pulley 72 is mounted at one end of the screw shaft 62 in series with a driven sprocket 70, which is connected to a rotation shaft of an encoder 80 through a belt 75. 80 detects the rotational speed of the screw shaft 62, which controls the rotational speed of the drive motor 67 through the control computer 85, and consequently controls the linear travel distance of the moving block 30. will be.

Roll spacing device (1) of the temper mill of the present invention configured as described above is a rolling roll 210 is worn and exchanged, and if you want to adjust the gap between the rolling rolls 210, the operator to adjust the rolling roll The actual spacing of 210 is measured, which is different from the set interval of the rolling roll 210, so select the thickness of the support liner 12 to compensate for this.

This process is performed as in the prior art, and accordingly, when the thickness of the support liner 12 is determined, as shown in FIG. 1, the rolling roll 210 using the rolling roll exchange cart 217 on the mill stand. After inserting them into the housing 215, the operator inputs the thickness of the support liner 12 to be compensated using a button of the integrated control computer 85 in the cab to support the upper surface of the backup roll choke 230. When set, the support runner 12 having a plurality of thicknesses in multiple stages in the rolling mill stand housing 215 and the moving block 30 which firmly supports it at the top are automatically driven by the driving cylinder 25 and the driving motor 67. Is positioned on the backup roll support block 5 fixed to the backup roll choke 230.

That is, with the input of the control computer 85 as described above, the control computer 85 rotates the drive motor 67 in a predetermined direction, the drive motor 67 is the drive sprocket 70 and the chain ( 69 and by moving the screw shaft 62 through the driven sprocket 70 the moving blocks 30 screwed to the screw shaft 62 are moved along the guides 58 in a predetermined direction.

In this process, the rotation of the screw shaft 62 detects the rotation speed of the drive motor 67 in the encoder 80, which transmits the information to the control computer 85 so that the control computer 85 drives the drive motor. The rotation speed of 67 is controlled. That is, the moving distance of the moving block 30 is adjusted so that the support liner 12 having the predetermined thickness can support the backup roll support block 5 at the center of the moving block 30. The motor 67 is rotated and moved by a predetermined rotational speed.

At the same time, the control computer 85 operates the drive cylinder 25 so that the support liners 12 together with the movable block 30 are brought into close contact with the backup roll support block 5. That is, when the moving block 30 is positioned on the upper side of the support block 5 by the drive motor 67, the support liners 12 follow the moving block 30 and the support block 5 while trailing. It is sandwiched between and to fix the backup roll choke 230, thereby compensating the gap due to the wear of the rolling rolls 210 rotatably mounted to the backup roll choke 230.

In this process, the support liners 12 moving together with the moving block 30 are moved so that the fixed block 32 on the upper part is slidably fitted to the moving block 30 and moves together with a slight relative moving speed difference. The space between the block 30 and the support block 5 is accurately found and inserted.

In this way, the movable block 30 and the support liners 12 support the upper support block 5 of the backup roll choke 230, which is used to compensate for the wear of the rolling roll. To support it.

Therefore, according to the present invention, the productivity of the maintenance work can be greatly improved by allowing a short time of working time generated during the regular replacement of the rolling rolls 210 and the wear compensation compensation of the rolling rolls to be shortened.

And, all the work is automatically performed in the cab to prevent the fall and stenosis disaster of the operator, and precise gap rolling is always possible by the accurate gap compensation of the rolling roll 210 to improve the quality of the rolled products will be.

Claims (3)

In the device that automatically inserts and replaces the liner that compensates the roll gap according to the diameter wear of the rolling roll 210 in the facilities of the skin pass mill (200) equipped in the mini mill hot rolling mill and blast furnace hot rolling mill, The support block 5 is fixed to the upper surface of the backup roll choke 230 supporting the roll 210 so as to be rotatable, and the plurality of support liners having the lower surface formed in multiple stages on the upper side of the support block 5. (12) are arranged for each of the backup roll choke 230 so as to be movable by the driving cylinder 25 in the longitudinal direction of the rolling roll 210, respectively, the support liner (12) to the upper side of the support liner (12) 12. A coarse rolling mill, characterized in that a pair of moving blocks 30 which move in the same direction as the support line 12 to support the rear surface of the support liner 12 are arranged to be movable by the drive motor 67 and the screw shaft 62. Roll spacers Device. According to claim 1, wherein a plurality of rotatable bearing wheels 14 are inserted into both sides of each of the support liner 12, the guide rails 16 are respectively disposed on both sides of the support liner 12 The guide rail 16 has an inner flow passage 16a having a U-shaped cross section in which the bearing wheels 14 are rotatable and movable, and the plurality of support liners 12 connect the connecting rods 20 in the middle thereof. The roll spacing device of the temper mill, characterized in that the plurality of support liners (12) are moved along the guide rail (16) by the operation of the drive cylinder (25) is integrally connected to each other via a plurality of. The fixed block 32 for guiding the lower surface of the movable block 30 is integrally mounted to the support liner 12 by being fixed with a stud bolt 36, and the fixed block 32. The guide groove 40 is formed in the upper surface of the longitudinal direction, the bottom of the guide groove 40 is formed with wedge grooves 42, the lower end of the movable block 30 of the fixed block 32 Wedge protrusions 52 corresponding to the wedge grooves 42 are provided, respectively, and are mounted to be slidable corresponding to the fixed block 32. Guide grooves 54 are formed on both side surfaces of the movable block 30, respectively. A plurality of guides 58 having guide protrusions 56 through which the guide grooves 54 are inserted are positioned at both sides of the movable block 30, respectively, and the screw shaft is operated by the operation of the driving motor 67. The jaw characterized in that the movable block 30 is moved along the guide 58 through the rotation of the 62. Roll gap adjustment mechanism of the mill.

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