KR101732982B1 - Work-Roll exchanging machine for Rolling Mill System - Google Patents

Work-Roll exchanging machine for Rolling Mill System Download PDF

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Publication number
KR101732982B1
KR101732982B1 KR1020150170430A KR20150170430A KR101732982B1 KR 101732982 B1 KR101732982 B1 KR 101732982B1 KR 1020150170430 A KR1020150170430 A KR 1020150170430A KR 20150170430 A KR20150170430 A KR 20150170430A KR 101732982 B1 KR101732982 B1 KR 101732982B1
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KR
South Korea
Prior art keywords
clamp
bar
pair
rolling mill
work rolls
Prior art date
Application number
KR1020150170430A
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Korean (ko)
Inventor
박석달
Original Assignee
주식회사 포스코
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Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020150170430A priority Critical patent/KR101732982B1/en
Application granted granted Critical
Publication of KR101732982B1 publication Critical patent/KR101732982B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
    • B21B31/103—Manipulators or carriages therefor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

A work roll changing apparatus for a rolling mill is disclosed. A work roll changing apparatus of a rolling mill according to an embodiment of the present invention includes a moving unit provided so as to be movable forward and backward with respect to a rolling mill including a pair of upper and lower work rolls and a pair of upper and lower work rolls The clamping unit being provided between the pair of upper and lower work rolls and clamping the work roll from the inside to the outside, and an outer clamp provided outside the pair of work rolls for clamping the outer side And an outer clamp for clamping the work roll inward.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work-roll exchanging machine for a rolling mill,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill, and more particularly, to a work roll changing apparatus for a rolling mill which can easily implement a work roll pull-in and pull-out operation for a finishing operation in a rolling process.

In the field of steel manufacturing, cold rolled steel sheets are manufactured through a series of processes such as pickling, cold rolling, cleaning, annealing, temper rolling and correction.

Among them, the cold rolling step is a step of rolling a metal material such as steel or stainless steel at a temperature close to normal temperature. The metal material is rolled between rotating rolls to reduce the thickness or the cross- (Rolling, rolling).

In the cold rolling process, the rolling apparatus includes a plurality of rolling rolls, such as work rolls and backup rolls, inside the housing. Rolling rolls need replacement and maintenance if their lifetime is shortened or damaged, and in the case of work rolls, it is necessary to replace them with work rolls having different functions depending on the process. Replacement of these rolls can be accomplished by using a crane, a jig and a truck mounted on the ceiling of the cold rolling line, and a lot of workers are mobilized and manually operated to cause a process loss due to the replacement operation, thereby hindering overall productivity.

In particular, since the roll of the cold rolling line is a considerable weight and has a large amount of oil spillage, there are various other problems such as slip, collision, and high risk of safety accidents such as crushing or falling, .

Korean Patent Publication No. 10-2008-0078875 (2008.08.28.) This document discloses a method and apparatus for replacing a roll using a moving mechanism such as a carriage or a choke.

The work roll changing device of the rolling mill according to the embodiment of the present invention is intended to be able to quickly exchange a pair of upper and lower work rolls in a short time.

According to an aspect of the present invention, there is provided a rolling mill including a movable unit movable forward and backward relative to a rolling mill including a pair of upper and lower work rolls, and a pair of upper and lower work rolls provided on the movable unit, A work roll changing device of a rolling mill including a clamping unit provided to be able to rotate the work roll.

The clamping unit includes an inner clamp which is provided between a pair of upper and lower work rolls to clamp the work roll from the inside to the outside and an outer clamp which is provided outside the pair of work rolls and clamps the work roll from outside to inside can do.

In addition, the outer clamp may be provided in the form of a clamp.

Further, the outer clamp includes a pair of clamp bars and a first driving cylinder for driving the clamp bars, and the clamp bar is connected to the clamp head and the head bar and the head bar to have an X- And a clamping link bar connected thereto.

Further, the clamping head includes a protector on the inner surface thereof.

The inner clamp may include a center bar provided at the center, a pair of plates extending from the inner side to the outer side by advancing and retreating the center bar, and a second driving cylinder for driving the center bar.

Further, the inner clamp may include a bellows cover.

The moving unit may include a rail provided opposite to the rolling mill, a bogie movable to move along the rail, and a sensing member for sensing a stop position of the bogie.

Further, the sensing member may include a sensing bar provided on one of the bogie or the rail, and a sensor provided on the other to detect the sensing bar.

Since the work roll changer of the rolling mill according to the embodiment of the present invention can simultaneously draw in and pull out the work rolls provided in the upper and lower pairs from the rolling mill, the working time can be greatly shortened and productivity can be improved, It is possible to prevent scratches on the surface during the exchange so as to contribute to the quality improvement of the rolled product.

Further, since the work roll changing apparatus of the rolling mill according to the embodiment of the present invention moves by using a bogie, and the upper and lower pair of work rolls can be simultaneously clamped by using the outer clamp and the inner clamp, Thereby maximizing product productivity.

1 is a perspective view showing a work roll changing apparatus of a rolling mill according to an embodiment of the present invention.
2 is a side view showing a work roll changing apparatus of a rolling mill according to an embodiment of the present invention.
3 is a perspective view showing an outer clamp of a work roll changing device of a rolling mill according to an embodiment of the present invention.
4 is a view showing an inner clamp of a work roll changing apparatus of a rolling mill according to an embodiment of the present invention.
5 and 6 are views for explaining the operation of the clamping unit of the work roll changing apparatus of the rolling mill according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

1 is a view schematically showing a configuration of a cold rolling system in which a work roll changing apparatus according to an embodiment of the present invention is used. Herein, the cold rolling system is exemplified in the present embodiment, but the present invention is not limited thereto. It is needless to say that the hot rolling system can be easily modified and modified by a person skilled in the art.

Referring to the drawings, the cold rolling system includes two tension reels 10 and 12 and a cold rolling mill 20 provided between the two tension reels 10 and 12.

The two tension reels 10 and 12 are composed of an input side tension reel 10 and an output side tension reel 12. The strip S released from the coil wound on the input side tension reel 10 is pushed and fixed by the pinch roll 14 and then is wound around the output side tension reel 12 ).

During the process, the strip S may not be accurately introduced into the output tension reel 12 due to its thickness, material, appearance, or type of steel. In order to correct this, the operator spreads the tip of the strip S and passes the tip of the strip S through an oil wiper (not shown) using a jig. The strip S then passes through the cold rolling mill 20 (Not shown) and then sent to the output tension reel 12. Reference numeral 16 is a deflector roll, and 18 is a shape roll.

That is, in summary, in the cold rolling system, the strip S is unwound from the input side tension reel 10, and the pinch roll 14 deflector 16, the shaping roll 18, the inlet oil wiper, ), And enters the output tension reel 12 through the output oil wiper.

As the cold rolling mill 20, a multi-stage rolling mill may be employed. Hereinafter, the structure of the rolling mill 20 will be described as an example of a 20-staged rolling mill, but the present invention is not limited thereto and may be applied to the 4th, 6th, 12th,

The cold rolling mill 20 includes four upper backup rolls 21 and four lower backup rolls 22 as well as three lower backup rolls 22 provided on the inner side of the upper backup roll 21 and the lower backup roll 22, Secondary intermediate rolls 23 and 24, two primary intermediate rolls 25 and 26, and one working roll 27 and 28. In order to roll the thin plate, the roll diameter must be made small. If the diameter is made small, it is difficult to obtain accuracy (precision) because the roll is warped. In the case of a 20-staged mill, a large number of supporting rolls are placed around a work roll having a very small size, so that the entire stiffener is made rigid.

The cold rolling mill 20 for rolling the annealed hot coils performs the rolling process while reversing the strip S 5 to 6 times. For example, the primary path of the strip S is performed while proceeding from the input-side tension reel 10 to the output-side tension reel 12, and then the strip S is fed from the output tension reel 12 to the input- A second pass is made while proceeding. When the reversible rolling is carried out while passing through these processes 5 to 6 times, the rolled steel sheet S having the final desired thickness can be processed.

On the other hand, during the rolling operation of the cold rolling mill 20, a finishing work is performed to finely process the surface of the strip S in the last pass PASS. For the finishing work, it is necessary to take out the work roll of the rolling mill installed at the time of installation, and to exchange the work roll for the finishing work.

Fig. 1 is a perspective view showing a work roll changing apparatus 100 according to an embodiment of the present invention, and Fig. 2 is a side view of Fig. 1. Fig.

Referring to the drawings, a work roll changing apparatus 100 includes a moving unit 110 for moving a changing apparatus to a work roll changing position in proximity to a rolling mill 20, A clamping unit 130 for clamping the rolls 27 and 28 and a control unit (not shown) for calculating the strip path line of the rolling mill to adjust the position of the work rolls 27 and 28.

The mobile unit 110 includes a rail 112 provided to be close to the rolling mill 20 and a carriage 114 on which the wheel 113 is mounted to be movable on the rail 112. [ Sprockets 115 are rotatably coupled to both ends of the rail 112 and the pair of sprockets 115 and the bogie 114 are connected by a chain 116. A motor 117 is provided on one side of the rail 112 and coupled to one of the sprockets to provide a driving force. In addition, the bogie 114 includes a sensing member for sensing the position on the rail and being able to stop at an appropriate position. In this embodiment, the detection bar 118 may be provided on the bogie 114 and the sensor 119 may be provided on the rail 112 to control the back and forth movement of the bogie 114 by the control unit. The mounting positions of the sensing bar 118 and the sensor 119 can be changed with each other.

The bogie 114 includes a rectangular frame 120 at the top and the frame 120 includes a clamping unit 130 for simultaneously holding a pair of work rolls 27 and 28, May be provided. Reference numeral 122 is a weight.

The clamping unit 130 includes an outer clamp 140 for clamping the pair of work rolls 27 and 28 on the outside, and an inner clamp 150 for clamping the inside of the pair of work rolls 27 and 28.

The outer clamp 140 includes a pair of clamp bars 141 and a first drive cylinder 145 for moving the clamp bar 141 from the outside to the inside.

The clamping bar 141 is connected to the first driving cylinder 145 by employing a bent shape and a link to operate as a clamp, as shown in Fig. The clamp bar 141 includes a clamp head 141a and a head bar 141b and a clamp link bar 141c connected to the head bar 141b to form an X shape.

The clamp head 141a may be provided on the inner surface with a soft protector 142 to reduce damage during clamping of the work rolls 27 and 28 and may also be provided in an arc shape for more robust clamping of the work rolls . The rear end of the clamping head bar 141b crosses each of the clamping heads 141a positioned above and below the work roll using pins and the clamping link bar 141c connects the clamping bar 141 to the first driving cylinder 145. [ To the first rod (143).

Therefore, when the first rod 143 of the first drive cylinder 145 extends to the rolling mill side, the gap between the pair of clamp bars 141A and 141B spreads from the inside to the outside, The work rolls 27 and 28 are clamped while the interval between the pair of clamp bars 141A and 141B is narrowed.

The inner clamp 150 includes a center bar 151 provided at the center as shown in a partially enlarged view in FIG. 4, a plate 155 extending and extending outward from the inner side by advancing and retreating the center bar 151, And a second drive cylinder 156 for driving the second drive shaft 151. One end of the center bar 151 can be easily extended in length when coupled to the second rod (not shown) of the second drive cylinder 156 using the clevis joint 152.

The center bar 151 includes a first link 153 and a second link 154 extending from the first link 153. The center bar 151 has a long hole 151a in the longitudinal direction and the first link 153 is slidably coupled to the first long hole 151a using a pin. The first link 153 is pin-coupled to the elongated hole 151a so as to be slid in an acute angle, for example, in the form of an arrow, toward the front of the clip center bar 151, and the bar- One end is coupled to the first link 153 and the other end is coupled to the plate 155 using the pin.

Since the inner clamp 150 needs to clamp the pair of work rolls 27 and 28 at the same time while expanding from the inner side to the outer side between the pair of work rolls 27 and 28, The first link 153 and the second link 154 may be provided in this row so as to maintain the parallelism of the plates 155A and 155B at the time of clamping.

The inner clamp 150 is wrapped with a cover 157 made of synthetic resin or rubber to prevent loss of hydraulic oil applied to the work rolls 27 and 28. The cover 157 is provided in a bellows shape so that the length of the inner clamp 150 can be varied.

Hereinafter, the operation of the work roll changing apparatus of the rolling mill having the above configuration will be described.

First, the bogie 114 of the mobile unit 110 is close to the mill 20 along the rail 112 when the exchange of work rolls 27, 28 is required for the mopping operation as described above. At this time, the stopping position of the mobile unit 110 is performed when the sensor 119 detects the detection bar 118 provided on the carriage 114.

The clamping unit 130 moves the outer clamp 140 and the inner clamp 150 toward the work rolls 27 and 28 to catch the pair of work rolls 27 and 28 in the rolling mill 20 . The first driving cylinder 145 of the outer clamp 140 and the second driving cylinder 156 of the inner clamp 150 operate simultaneously with the approach of the work roll since the position of the work roll is preset in the control unit.

For example, the first driving cylinder 145 of the outer clamp 140 pulls the first rod 143 to reduce the clamping bars 141A and 141B from the outside to the inside, and the second driving cylinder 145 of the inner clamp 150 The first rod 156 pushes the second rod to expand and move the plates 155A and 155B from the inside to the outside. When the clamping unit 130 clamps the work rolls 27, 28 at the same time, the moving unit 110 retreats along the rails 112 to pull the rolling work roll outward.

On the other hand, the welding work roll for finishing work is mounted on a moving cart, not shown, and is moved up to the work roll changing apparatus 100 by an operator, and then mounted on the clamping unit 130 in the same manner as the above- . When the clamping of the work rolls 27 and 28 is completed, the brakes 114 of the movable unit 110 are moved to draw the work rolls to the work roll setting positions of the rolling mill 20, 130) and returns to the stand-by position.

10,12 .. Tension Reel 20 .. Rolling Mill
100 .. Work roll changing device 110 .. Mobile unit
112 .. rail 114 .. carriage
118 .. Sensor Bar 119 .. Sensor
130 .. Clamping unit 140 .. Outer clamp
150 .. Inner Clamp

Claims (9)

delete A moving unit provided so as to be movable forward and backward with respect to a rolling mill including a pair of upper and lower work rolls,
And a clamping unit which is provided on the moving unit and is provided so as to be capable of simultaneously clamping the upper and lower pairs of work rolls and pulling or pulling the same from the rolling mill,
The clamping unit
An inner clamp which is provided between the pair of upper and lower work rolls and clamps the pair of work rolls while expanding from the inside to the outside,
And an outer clamp which is provided outside the pair of work rolls and clamps the pair of work rolls while being reduced inward from the outside to the inside. 3. The method of claim 2,
Wherein the outer clamp is provided in the form of a pincer. The method of claim 3,
Wherein the outer clamp includes a pair of clamp bars and a first drive cylinder for driving the clamp bar,
Wherein the clamp bar includes a clamping head and a head bar, and a clamp link bar having an X-shape connected to the head bar and connected to the first driving cylinder. 5. The method of claim 4,
Wherein the clamp head includes a protector on an inner surface thereof. 3. The method of claim 2,
Wherein the inner clamp includes a center bar provided at the center, a pair of plates extending from the inner side to the outer side by advancing and retreating the center bar, and a second driving cylinder for driving the center bar, . The method according to claim 6,
Wherein the inner clamp includes a bellows cover. 3. The method of claim 2,
The mobile unit
A rail provided opposite to the rolling mill,
A carriage provided movably along the rail,
And a sensing member for sensing the stop position of the bogie. 9. The method of claim 8,
Wherein the sensing member comprises a sensing bar provided on one of the bogie or rail,
And a sensor provided on the other for detecting the detection bar.
KR1020150170430A 2015-12-02 2015-12-02 Work-Roll exchanging machine for Rolling Mill System KR101732982B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150170430A KR101732982B1 (en) 2015-12-02 2015-12-02 Work-Roll exchanging machine for Rolling Mill System

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150170430A KR101732982B1 (en) 2015-12-02 2015-12-02 Work-Roll exchanging machine for Rolling Mill System

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KR101732982B1 true KR101732982B1 (en) 2017-05-08

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019045189A1 (en) * 2017-08-30 2019-03-07 주식회사 포스코 Rolling mill roll replacement system and roll replacement method using same
KR20200098044A (en) * 2019-02-11 2020-08-20 주식회사 현대알비 Copander machine
KR102543037B1 (en) 2022-12-13 2023-06-14 이재도 Yarn's separation cling to bobbin
KR102543035B1 (en) 2022-12-13 2023-06-14 이재도 Yarn dividing machine
KR20240077143A (en) 2022-11-24 2024-05-31 주식회사 포스코 Tool for changing workroll

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019045189A1 (en) * 2017-08-30 2019-03-07 주식회사 포스코 Rolling mill roll replacement system and roll replacement method using same
KR20200098044A (en) * 2019-02-11 2020-08-20 주식회사 현대알비 Copander machine
KR102204518B1 (en) * 2019-02-11 2021-01-19 주식회사 현대알비 Copander machine
KR20240077143A (en) 2022-11-24 2024-05-31 주식회사 포스코 Tool for changing workroll
KR102543037B1 (en) 2022-12-13 2023-06-14 이재도 Yarn's separation cling to bobbin
KR102543035B1 (en) 2022-12-13 2023-06-14 이재도 Yarn dividing machine

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