KR20120070052A - Roll having function for anti-snaking - Google Patents

Roll having function for anti-snaking Download PDF

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Publication number
KR20120070052A
KR20120070052A KR1020100131449A KR20100131449A KR20120070052A KR 20120070052 A KR20120070052 A KR 20120070052A KR 1020100131449 A KR1020100131449 A KR 1020100131449A KR 20100131449 A KR20100131449 A KR 20100131449A KR 20120070052 A KR20120070052 A KR 20120070052A
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KR
South Korea
Prior art keywords
strip
roll body
roll
meandering
center
Prior art date
Application number
KR1020100131449A
Other languages
Korean (ko)
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KR101256515B1 (en
Inventor
진용희
Original Assignee
주식회사 포스코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR20100131449A priority Critical patent/KR101256515B1/en
Publication of KR20120070052A publication Critical patent/KR20120070052A/en
Application granted granted Critical
Publication of KR101256515B1 publication Critical patent/KR101256515B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/008—Rollers for roller conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/18—Rolls or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/24—Hydrostatic bearings or guides

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)

Abstract

A roll device having a meandering prevention function is formed in which the surface of the roll body has a convex curved crown structure and a restoring force that pushes the strip toward the center portion upon contact with the strip acts to suppress the meandering of the strip.
The apparatus is a roll device for contacting the strip 30 to advance the strip in a predetermined direction, comprising: a rotating shaft 110, both ends of which are coupled to each of the bearing blocks 111 to be rotatable; The center is fitted to the rotation shaft 110 and rotates integrally with the rotation shaft 110, and the outer diameter gradually decreases from the center portion 121 forming the width direction toward the end portions 122 on both sides, so that the outer diameter is gradually reduced. And a roll body 120 having a surface of a crown structure in which the center portion 121 has a convex shape.

Description

Roll device with meandering function {ROLL HAVING FUNCTION FOR ANTI-SNAKING}

The present invention relates to a roll apparatus having a meandering prevention function, and more particularly, the surface of the roll body has a convex curved crown structure, and the restoring force acts to push the strip toward the center when contacted with the strip. The present invention relates to a roll apparatus having a meandering function to prevent meandering of the strip.

DRM process of rolling process and plating process consists of intermittent process, not continuous process like PCM. Due to this, there is no welder connecting the coils to the coils, and thus, a tension-free period is inevitable while the coils progress from the payoff reel to the tension reel.

In general, CPC (Center Position Control), a facility to prevent meandering of the strip, only works when the tension is "ON" after the strip has been mailed through the entire line (from the reel to the tension reel).

Due to the limitations of the installation, the coil may be unwound due to the meandering of the strip during initial mailing, and thus, when the coil is transported by the crane, the protruded part may be damaged or the packaging may be torn.

1 is a view showing a state that the strip proceeds by the press roll and the bridal roll, Figure 2 is a view showing a state that the meandering of the strip due to the single wear of the conventional press roll.

1 and 2, the press roll 10 is in contact with the bridal roll 20 and serves to push the strip 30 entering therebetween in the advancing direction, and the material of the press roll. Since it is a flat roll (hereinafter referred to as "flat roll") made of a soft louver (rubber) material, due to the surface condition of the strip 30 and the working environment, wear occurs for a long time.

The uneven wear of the press roll 10 was analyzed as a main cause of meandering in the progress of the strip. When uneven wear occurs in the press roll 10, the friction coefficients in the width direction of the press roll 10 are different from each other. When the strip 30 is advanced between the rolls 20, there is a deviation in the pressing force applied to the strip 30.

Therefore, when the strip 30 progresses in the tension-free section, the twisting of the strip occurs in a direction where the wear of the press roll 10 is relatively less, thereby causing meandering of the strip.

Referring to Figure 2, the left side portion of the press roll 10 with respect to the direction of travel of the strip 30 is worn more than the right side bar deviation of the pressing force on the left and right sides of the press roll 10, Accordingly, the friction coefficient of the left portion of the press roll 10 is smaller than the right portion.

Therefore, the strip 30 gradually increases the amount of progression of the right portion having a large coefficient of friction, resulting in meandering to the left.

As described above, the meandering of the strip starting from the side press roll 10 becomes more severe when the coil is wound on the tension reel, which causes the coil to be unwound after the coil is wound. This may cause problems such as breakage of the protrusion of the coil or tearing of the wrapping paper.

The present invention is to solve the problems as described above, the object is to improve the structure of the press roll which is the root cause of the meandering occurrence of the meandering of the strip in the DRM process so that the strip meandering contact Even if the press roll itself is to guide the strip to the center portion to prevent meandering.

In order to solve the above-mentioned problems,

In the roll apparatus for contacting the strip to advance the strip in a predetermined direction,

A rotating shaft having both ends coupled to the respective bearing blocks to be rotatable;

A roll body having a crown structure having a center surface fitted to the rotating shaft and integrally rotating with the rotating shaft, and having an outer diameter gradually decreasing from the center portion forming the width direction toward the end portions on both sides, the center portion being convex than the end portion. including,

When the roll body is in contact with the strip provides a roll device having a meandering prevention function characterized in that the pressing force of the center portion is greater than the end portion of the roll body so that the strip proceeds in the center direction without meandering.

In the roll body, grooves having a predetermined width and depth are respectively formed between the center portion and the end portion of the roll body, and the grooves are elastically installed on the rotating shaft to move the strip to move in the center direction when the strip is in contact with the strip. It is characterized by the installation.

In addition, the moving unit, the guide portion which is fitted to the outer peripheral surface of the rotating shaft;

A slider which is fitted to an outer circumferential surface of the guide part and slides along a length direction of the guide part; A moving member coupled to the outer circumferential surface of the slider via a connecting arm, the surface of which is disposed in the groove to match the radius of curvature of the roll body; A restoring spring provided between the end portion of the roll body and the slider on the guide portion to provide restoring force when the slider is pushed toward the end portion of the roll body; And a clearance holding spring installed between the center portion of the roll body and the slider on the guide portion to maintain a predetermined clearance between the moving member and the center portion.

In addition, the rotation shaft is characterized in that the stopper for preventing the guide portion and the restoring spring is pushed toward the end of the roll body.

In addition, the moving member is formed in the shape of an annular ring, the connecting arm is characterized in that arranged at least two or more to have a constant phase angle between the moving member and the slider.

According to the present invention, since the roll body has a curved crown structure with a convex center portion, the rolling force of the center portion is greater than that of the end portion upon contact with the strip, so that the strip is not biased to either side. As it proceeds in the direction, there is a unique effect that the meandering of the strip is suppressed accordingly.

In addition, even when the strip and the roll body is in initial meandering contact, since the restoring force in the direction of the center portion is applied to the strip by the moving unit installed in the roll body, the strip is gradually guided toward the center portion to suppress meandering.

1 is a view showing a state that the strip proceeds by the press roll and the bridal roll,
Figure 2 is a view showing a state in which meandering of the strip due to the single wear of the conventional press roll,
3 is a cross-sectional view showing the structure of a roll apparatus having a meandering prevention function according to the present invention;
Figure 4 is a longitudinal sectional view for showing the structure of the moving unit according to the present invention,
5 is a working state of the roll apparatus according to the present invention.

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

Referring to the roll apparatus according to the present invention with reference to Figure 3, the present invention largely comprises a rotating shaft 110 and a roll body 120.

Both ends of the rotary shaft 110 are provided to be rotatable coupled to the bearing block 111 provided on both ends of the rotary shaft 110.

The rotating shaft 110 has a predetermined diameter and length, the diameter and length of the rotating shaft 110 can be appropriately set in consideration of the size of the strip (30).

On the other hand, the roll body 120 is configured to be rotated integrally with the rotary shaft 110 is fitted to the center of the rotary shaft 110, the roll body 120 is in contact with the surface of the strip 30 strip 30 ) Is a configuration for advancing in a predetermined direction.

For reference, in the related art, since the roll body 120 is formed of a flat roll, the rolling force is also uniform until the wear body is uniformly contacted with the strip 30 at an initial stage, but the abrasion occurs in the roll body 120. When the deviation occurs in the pressing force occurs a problem that the meandering of the strip 30 occurs.

However, in the present invention, as shown in FIG. 3, a portion forming both ends of the roll body 120 from a portion centered with respect to the width direction of the roll body 120 (hereinafter referred to as a “center portion 121”). The outer diameter gradually decreases (hereinafter referred to as “end portion 122”) to form the surface of the crown structure in which the center portion 121 is convex than the end portion 122.

That is, since the roll body 120 as a whole has a curved structure having a convex shape as compared with the end portion 122 of the center portion 121, the roll body 120 comes into contact with the strip 30 when the roll body 120 is in contact with the strip 30. The pressing force of the center portion 121 is greater than that of the end portion 122 of the 120, so that the strip 30 proceeds toward the center without being biased to one side, and thus the meandering of the strip 30 is performed. This is suppressed.

If the reduction force in contact with the strip 30 is equal to the end portion 122 and the center portion 121, or the end portion 122 is larger than the center portion 121, the reduction in the end portion 122 When a deviation occurs in the force, the meandering of the strip 30 occurs, but as in the present invention, if the reduction force in the center portion 121 of the roll body 120 is the largest, the deviation does not occur in the reduction force. 30) will proceed only in the middle (center) direction with respect to the width direction.

Here, the diameter difference between the center portion 121 and the end portion 122 of the roll body 120 is preferably set to be 5 ~ 15mm. Of course, the meandering can be suppressed even if the diameter difference is 5 mm or less, but it is preferable that the meandering is at least 5 mm or more to suppress meandering by experiment. When the diameter difference exceeds 15 mm, the meandering suppression performance is excellent, but the strip 30 is excellent. Excessive curves are undesirable.

On the other hand, the roll body 120 according to the present invention can be used for all kinds of strips 30, which is at least the same or smaller than the width of the roll body 120, the strip 30 is smaller than the width of the roll body 120 In this case, there is a problem that sharp edges may damage the surface of the roll body 120 as both ends of the width direction of the strip 30 (hereinafter, referred to as “edge portions”) are sag.

When the edge portion of the strip 30 damages the surface of the roll body 120, even if the roll body 120 of the present invention has a crown structure, as described above, meandering may occur, and the roll body may be continuously formed ( If damage is accumulated in the 120, there is a problem that expensive roll body 120 must be replaced.

Therefore, even when the roll body 120 of the present invention is applied to the strip 30 having a width smaller than the width of the roll body 120, the roll body 120 is prevented from being damaged and the roll body 120 is smoothly suppressed. (120) It is preferable to form a recess 130 having a predetermined size between the center portion 121 and the end portion 122.

The groove 130 has a predetermined width and depth, the width of the groove 130 is preferably formed to have a range of 300 ~ 400mm in the width direction of the roll body 120, the groove 130 Although the depth of is implemented in the embodiment of the present invention to be made of about 3 ~ 6mm These figures are not necessarily limited to this can be appropriately changed according to the needs of the practitioner.

In addition, the groove 130 is provided with a moving unit 200, as shown in Figure 3, the moving unit 200 is elastically installed on the rotary shaft 110, the contact with the strip 30 when the strip ( 30) to guide the progression in the center direction.

Here, since the moving unit 200 is detachably assembled to the roll body 120, when the moving unit 200 is damaged by the edge portion of the strip 30, the moving unit 200 does not need to be replaced. Since only the moving unit 200 can be removed and replaced, it is also advantageous in terms of cost reduction.

As shown in FIG. 5, when the roll body 120 in which the moving unit 200 is installed and the strip 30 are initially in contact, the flat strip 30 has a central portion of the center of the roll body 120. Not exactly matched with (121) can be in contact with one side biased, this is called the initial meandering contact.

As such, when the initial meandering contact with the strip 30 occurs, the roll body 120 may be damaged by any one edge portion of the inclined strip 30, but the edge portion position thereof is the moving unit 200. When this coincides with the installed point, the roll body 120 is not damaged and the initial meandering contact is also adjusted so that the strip 30 proceeds normally.

That is, even when the edge portion of the strip 30 presses the moving unit 200, the moving unit 200 is initially moved toward the end portion 122 of the roll body 120 by the pressing force, but immediately by the restoring force. The strip 30 is pushed toward the center portion 121 and thus the strip 30 is meandered in contact with the curvature radius of the roll body 120 while finding the normal position of the strip 30. It is seated on the body 120.

As shown in FIGS. 3 and 4, the moving unit 200 includes a guide unit 210, a slider 220, a moving member 230, a restoring spring 240, and a clearance holding spring 250. It is done by

The guide portion 210 is fitted to the outer circumferential surface of the rotating shaft 110, the inner circumferential surface of the guide portion 210 is fixedly coupled to the outer circumferential surface of the rotating shaft 110 and the outer circumferential surface of the guide portion 210 is the slider The friction coefficient is set very low so that 220 can slide smoothly.

The slider 220 is configured to slide along the longitudinal direction of the guide portion 210 when it is fitted to the outer peripheral surface of the guide portion 210 receives an external force.

In addition, the moving member 230 is to be coupled via the connecting arm 235 on the outer circumferential surface of the slider 220, the surface of the moving member 230 to match the radius of curvature of the roll body 120 It is disposed in the groove 130.

Even when the moving member 230 is installed on the surface extending from the center portion 121 to the end portion 122 of the roll body 120, the moving member 230 is not protruded or recessed so that the strip contacts the surface thereof. 30) can be stably progressed.

Here, the moving member 230 is formed in an annular ring shape as shown in Figure 4, the connecting arm 235 is provided with at least two or more constant between the moving member 230 and the slider 220 It is arranged to have a phase angle.

In the embodiment of the present invention, the connecting arm 235 has a phase angle of 90 degrees so that the connecting arm 235 can be properly supported when an external force from the strip 30 is applied to the surface of the moving member 230. Although four are provided, the number and phase angles of the connection arms 235 may be changed according to the needs of the implementer without necessarily being limited thereto.

On the other hand, the restoration spring 240 is to be installed on the outer circumferential surface of the guide portion 210, the installation position is between the end portion 122 and the slider 220 of the roll body 120.

Therefore, when the strip 30 exerts an external force on the moving member 230 and the slider 220 is pushed toward the end portion 122 of the roll body 120, the restoring spring 240 restores the guide portion 210. The moving member 230 is provided to push the strip 30 toward the center portion 121.

In addition, the clearance holding spring 250 is installed on the center portion 121 and the slider 220 of the roll body 120 on the outer peripheral surface of the guide portion 210, the moving member 230 and the roll body ( A constant clearance is maintained between the center portions 121 of 120.

When the moving member 230 receives an elastic force by the restoring spring 240, the moving member 230 not only has a characteristic of moving toward the center portion 121 of the roll body 120, but also the restoring spring 240 has a restoring force on the slider 220. When the moving member 230 moves integrally with each other to provide a fear of colliding with the center portion 121 of the roll body 120, the clearance holding spring 250 buffers such a collision while the moving member 230 and the moving member 230 are moved. The center portion 121 of the roll body 120 helps to maintain a constant clearance at all times.

In addition, the rotation shaft 110 is preferably provided with a stopper 260 for preventing the guide portion 210 and the restoring spring 240 is pushed toward the end portion 122 of the roll body 120. When the strip 30 is initially in contact with the moving member 230, an external force directed toward the end portion 122 of the roll body 120 is applied to the moving member 230. In this case, the stopper 260 is a guide part ( 210 and the end of the restoring spring 240 is supported so that the restoring force by the restoring spring 240 is normally exhibited while the guide portion 210 is not moved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed exemplary embodiments. It is to be understood that the invention is not limited thereto.

110: rotation axis 120: roll body
121: center portion 122: end portion
130: groove 200: moving unit
210: guide portion 220: slider
230: moving member 240: restoring spring
250: play oil holding spring 260: stopper

Claims (5)

In the roll apparatus for contacting the strip 30 to advance the strip in a predetermined direction,
Rotating shaft 110 is installed so that both ends are rotatably coupled to each bearing block 111;
The center is fitted to the rotation shaft 110 and rotates integrally with the rotation shaft 110, and the outer diameter gradually decreases from the center portion 121 forming the width direction toward the end portions 122 on both sides, so that the outer diameter is gradually reduced. Including; a roll body 120 having a surface of the crown structure having a convex shape of the center portion 121;
When the roll body 120 is in contact with the strip 30, the rolling force of the center portion 121 is greater than that of the end portion 122 of the roll body 120, so that the meandering does not occur and the strip 30 is in the center direction. Roll device having a meandering function, characterized in that to proceed. The method according to claim 1, wherein the grooves 130 having a predetermined width and depth are formed between the center portion 121 and the end portion 122 in the roll body 120, the groove 130 is the rotation shaft 110 Rolling device having a meandering prevention function, characterized in that the moving unit 200 is installed elastically installed to guide the strip 30 proceeds in the center direction when contacted with the strip 30. The method of claim 2, wherein the moving unit 200,
A guide part 210 fitted to an outer circumferential surface of the rotation shaft 110;
A slider 220 fitted to an outer circumferential surface of the guide part 210 and sliding along a length direction of the guide part 210;
A moving member 230 coupled to the outer circumferential surface of the slider 220 via a connection arm 235 and disposed on the groove 130 so that the surface thereof matches the radius of curvature of the roll body 120;
It is installed between the end portion 122 of the roll body 120 and the slider 220 on the guide portion 210 to provide a restoring force when the slider 220 is pushed toward the end portion 122 of the roll body 120. Restoring spring 240 to be;
A clearance holding spring is installed between the center portion 121 and the slider 220 of the roll body 120 on the guide portion 210 to maintain a predetermined clearance between the moving member 230 and the center portion 121 ( 250); Roll apparatus having a meandering function comprising a. The stopper 260 is installed on the rotation shaft 110 to prevent the guide portion 210 and the restoring spring 240 from being pushed toward the end portion 122 of the roll body 120. Roll device with meandering function. The method of claim 4, wherein the moving member 230 is formed in an annular ring shape, the connecting arm 235 is provided with at least two or more arranged to have a constant phase angle between the moving member 230 and the slider 220 Roll device having a meandering function characterized in that.
KR20100131449A 2010-12-21 2010-12-21 Roll having function for anti-snaking KR101256515B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20100131449A KR101256515B1 (en) 2010-12-21 2010-12-21 Roll having function for anti-snaking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20100131449A KR101256515B1 (en) 2010-12-21 2010-12-21 Roll having function for anti-snaking

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Publication Number Publication Date
KR20120070052A true KR20120070052A (en) 2012-06-29
KR101256515B1 KR101256515B1 (en) 2013-04-22

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KR20100131449A KR101256515B1 (en) 2010-12-21 2010-12-21 Roll having function for anti-snaking

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116586426A (en) * 2023-06-08 2023-08-15 江苏甬金金属科技有限公司 Steel strip rolling device with anti-offset function

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0688068B2 (en) * 1988-12-09 1994-11-09 住友金属工業株式会社 Crown roll
JPH05192706A (en) * 1992-01-20 1993-08-03 Nkk Corp Crown roll
JP3097270B2 (en) * 1992-02-26 2000-10-10 住友金属工業株式会社 Crown adjustment roll

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116586426A (en) * 2023-06-08 2023-08-15 江苏甬金金属科技有限公司 Steel strip rolling device with anti-offset function

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