KR102294083B1 - Roll of Rolling Mill Including Different Kind Metal Junctional Body Component - Google Patents

Abstract

Provided is a rolling mill roll including a dissimilar metal assembly component. The rolling mill roll, for a rolling mill to roll a steel plate, comprises a sleeve covering the neck of the roll and a bushing bearing covering the sleeve. The sleeve and the bushing bearing are made of a dissimilar metal assembly. The dissimilar metal assembly comprises a main body and a joint member joined on one side of the main body by fusion. A bumpy unit is formed with shapes symmetric to each other on the surface where the main body and the joint member contact each other. A bonding unit joining the main body and the joint member by solid treatment is formed on an edge of the surface where the main body and the joint member contact each other. The main body and the joint member are fastened with each other by a fastening means. The present invention provides a rolling mill roll which can secure normal operation of the roll by comprising the dissimilar metal assembly component in which dissimilar metals are hard to be separable because of the bumpy shape on the contact portion of the dissimilar metals.

Description

Roll of Rolling Mill Including Different Kind Metal Junctional Body Component

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill roll, and more particularly, to a rolling mill roll comprising a joined body part in which different types of metals are rigidly joined.

In a typical rolling mill, the neck of the roll is rotationally supported in bearings, which in many cases are oil film bearings. Oil film bearings include a sleeve that is received and secured on a roll neck. The sleeve is journaled for rotation within a bushing fixed within a chock section, and the choke section is supported in a roll housing. A flow of oil is introduced between the sleeve and the bushing, allowing the sleeve to rotate over the oil film that remains hydrodynamically in the bearing load region.

The mill lubrication system includes a reservoir of oil spaced from the roll stand. The oil is pumped through a filter and heat exchanger before being transported to the bearings and returned from the bearings through a drainage network to the reservoir.

Since the roll of the rolling mill rotates at a high speed and has an excessive load, a sleeve and a bearing are essentially used as a structure of fluid lubrication to support the main shaft of the roll of the rolling mill.

These sleeves and bearings must have sufficient life reliability and fluid lubricity to ensure normal operation and stability of the rolls of the rolling mill.

Republic of Korea Patent Publication No. 10-1990391

The problem to be solved by the present invention is to form a concave-convex shape at the portion where two dissimilar metals are in contact with each other so that they are coupled to each other, so that it is structurally difficult to separate dissimilar metals. And to provide a rolling mill roll that can ensure stability.

The problem to be solved by the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a rolling mill roll. The rolling mill roll may include a sleeve enclosing the roll neck and a bushing bearing enclosing the sleeve in a rolling mill for rolling a steel sheet. The sleeve and bushing bearings may be made of dissimilar metal joints. The dissimilar metal joint body may have a configuration including a body and a joining member joined to one surface of the body by melting. Concave and convex portions having a shape symmetrical to each other are formed on the surface where the body and the bonding member are in contact, and a bonding portion for bonding the body and the bonding member by solid processing is further formed on the edge of the surface where the body and the bonding member are in contact, and the body and the bonding member are formed. The members may have a configuration coupled to each other by fastening means.

The mill roll further includes a choke surrounding the bushing bearing. The choke may be formed of a dissimilar metal assembly.

The concavo-convex portion may include concave-convex grooves and concavo-convex protrusions that are formed to be symmetrical to each other on the body and the bonding member, respectively.

The concave-convex groove may have a shape recessed inward from the outer surface of the main body or the bonding member, and may be formed to gradually increase in cross-sectional area toward the inner side.

The uneven protrusion is formed to protrude outward from the outer surface of the bonding member or body, and may have a shape in which the cross-sectional area gradually increases toward the outside.

The concavo-convex portion may include a protrusion and a receiving groove formed in a shape symmetrical to each other on the body and the bonding member, respectively.

The receiving groove may include a body groove formed inside the body or the joining member to form a predetermined space, and a neck hole formed between the body groove and the outer surface of the body or the joining member and having a cross section smaller than that of the body groove. have.

The protrusion is formed to protrude to the outside of the main body or the bonding member, is formed to have a shape symmetrical to the shape of the body groove and the neck hole, and may include a body part and a neck part accommodated in the body groove and the neck hole, respectively.

The uneven portion may be formed in multiple stages.

The bonding portion may be a cured adhesive filled in a bonding groove formed by a chamfer on the edge of the surface in contact with the body and the bonding member.

As described above, according to the solution to the problem of the present invention, the rolling mill roll including the dissimilar metal joined body part has the following effects.

Concave-convex portions may be formed in the joint of the dissimilar metal joined body parts of the rolling mill roll according to an embodiment of the present invention. Accordingly, the sliding of the two metals to each other can be prevented by the concavo-convex portion. In particular, when the concave-convex portion is formed as in the embodiment of the present invention, since the two metals do not separate from each other up and down as well as left and right, there is an advantage that a strong coupling is possible.

In addition, in the dissimilar metal assembly part of the rolling mill roll according to an embodiment of the present invention, in addition to forming the uneven portion, two metals may be combined by a solid process. Therefore, there is an advantage that the bonding of dissimilar metal joined body parts is more robust.

In addition, the dissimilar metal assembly part of the rolling mill roll according to an embodiment of the present invention may be further provided with a separate fastening means to combine dissimilar metals. Accordingly, since the two metals are coupled to each other by the concavo-convex portion, bonding, and fastening screws, there is an effect that the dissimilar metal assembly is completely coupled.

Accordingly, the sleeve, the bushing bearing and the choke have sufficient lifetime reliability and fluid lubricity to ensure normal operation and stability of the rolling mill roll.

1 is a side cross-sectional view for explaining a schematic structure of a rolling mill including a rolling mill roll according to an embodiment of the present invention.
2 is a front view for explaining a rolling mill roll according to an embodiment of the present invention.
3 is a cross-sectional view of a roll neck in order to explain a configuration of a rolling mill roll according to an embodiment of the present invention.
4 is a cross-sectional view for explaining the configuration of a dissimilar metal assembly part of a rolling mill roll according to an embodiment of the present invention.
5 is a cross-sectional view for explaining another configuration of a dissimilar metal joined body part of a rolling mill roll according to an embodiment of the present invention.
6 is a cross-sectional view for explaining another configuration of a dissimilar metal joined body part of a rolling mill roll according to an embodiment of the present invention.
7 is a cross-sectional view for explaining another configuration of a two-piece metal joined body part of a rolling mill roll according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and a method of achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein, and may be embodied in different forms. Rather, the embodiments introduced herein are provided so that this disclosure may be thorough and complete and the spirit of the present invention may be sufficiently conveyed to those skilled in the art, and the present invention is only defined by the scope of the claims.

Like reference numerals refer to like elements throughout the specification. Accordingly, the same or similar reference signs may be described with reference to other drawings, even if not mentioned or described in the drawings. In addition, although reference numerals are not indicated, descriptions may be made with reference to other drawings.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, 'comprises' and/or 'comprising' refers to the presence of one or more other components, steps, operations and/or devices mentioned. or addition is not excluded. In addition, since it is according to a preferred embodiment, reference signs provided in the order of description are not necessarily limited to the order.

When an element is referred to as 'connected to' or 'coupled to' with another element, it means that another element is directly connected or combined with another element, or in the middle of another element. Includes all cases involving On the other hand, when one element is referred to as 'directly connected to' or 'directly coupled to' with another element, it indicates that another element is not interposed therebetween. 'and/or' includes each and every combination of one or more of the recited items.

Spatially relative terms 'below', 'beneath', 'lower', 'above', 'upper', etc. It can be used to easily describe a device or component's correlation with another device or component. Spatially relative terms should be understood as terms including different orientations of the device in use or operation in addition to the orientation shown in the drawings. For example, if the device shown in the figure is turned over, a device described as 'beneath' or 'beneath' of another device may be placed 'above' of the other device. Accordingly, the exemplary term 'down' may include both the downward and upward directions. The device may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to orientation.

Further, the embodiments described herein will be described with reference to cross-sectional and/or plan views, which are ideal illustrative views of the present invention. In the drawings, thicknesses of films and regions are exaggerated for effective description of technical content. Accordingly, the form of the illustrative drawing may be modified due to manufacturing technology and/or tolerance. Accordingly, the embodiments of the present invention are not limited to the specific form shown, but also include changes in the form generated according to the manufacturing process. For example, the region shown at right angles may be rounded or may have a predetermined curvature. Accordingly, the regions illustrated in the drawings have a schematic nature, and the shapes of the illustrated regions in the drawings are intended to illustrate specific shapes of regions of the device and not to limit the scope of the invention.

1 is a side cross-sectional view for explaining the schematic structure of a rolling mill including a rolling mill roll according to an embodiment of the present invention, Figure 2 is a front view for explaining the rolling mill roll according to an embodiment of the present invention, Figure 3 is a cross-sectional view of a roll neck to explain one configuration of a rolling mill roll according to an embodiment of the present invention, and FIG. 4 is a configuration of a dissimilar metal assembly part of a rolling mill roll according to an embodiment of the present invention. It is a cross-sectional view for explanation.

1 to 4 , a rolling mill roll may include a sleeve surrounding a roll neck and a bushing bearing surrounding the sleeve in a rolling mill for rolling a steel sheet. The sleeve, bushing bearing and choke may be made of a dissimilar metal joint.

The mill roll further includes a choke surrounding the bushing bearing. The choke may be formed of a dissimilar metal assembly.

The dissimilar metal bonding body may have a configuration including the body 100 and the bonding member 200 joined to one surface of the body 100 by melting. Concave-convex portions 300 having a shape symmetrical to each other are formed on the surface where the body 100 and the bonding member 200 are in contact, and the edge of the surface where the body 100 and the bonding member 200 are in contact is treated with a solid. A bonding portion 400 for bonding the body 100 and the bonding member 200 is further formed by the, and the body 100 and the bonding member 200 are coupled to each other by the fastening means 500 . can

As shown in FIG. 4 , the dissimilar metal joined body part of the rolling mill roll according to an embodiment of the present invention may be made of a body 100 and a bonding member 200 joined to one surface of the body 100 by melting. have.

For example, in the rolling mill roll, the surface side of the sleeve surrounding the roll neck becomes the bonding member 200 made of white metal or titanium (Ti), and the outer side of the sleeve is the body 100 . can be Similarly, the surface side surrounding the bushing bearing surrounding the sleeve and the choke surrounding the bushing bearing in the rolling mill roll may be the bonding member 200 , and the outer side may be the body 100 .

In addition, the concave-convex portion 300 having a shape symmetrical to each other may be formed on a surface where the body 100 and the bonding member 200 contact each other. Specifically, as shown, a concave-convex shape is formed on the contact surface of the body 100 and the bonding member 200 , and the concave-convex shape serves to strengthen the coupling between the body 100 and the bonding member 200 . can do. That is, even when the roll neck is rotated on the upper surface of the bonding member 200 , the bonding member 200 is firmly fixed to the body 100 , so there is a slip between the bonding member 200 and the body 100 . ) may not occur.

The dissimilar metal assembly part of the rolling mill roll according to an embodiment of the present invention may have a configuration in which solid processing and bonding are added in addition to the shape of the concave-convex portion 300 described above.

Specifically, a bonding portion 400 for bonding the body 100 and the bonding member 200 to the body 100 and the bonding member 200 by solid processing is further formed on the edge of the surface where the body 100 and the bonding member 200 are in contact, and the body ( 100 and the bonding member 200 may be coupled to each other by the fastening means 500 .

And as shown in the figure, the rim of the main body 100 and the bonding member 200 in contact with each other is chamfered. That is, a portion of the edge of the contact surface is cut to form a bonding groove 410 , and an adhesive such as a bond may be filled in the bonding groove 410 to form the bonding portion 400 . Accordingly, by applying heat of 360° C. to 380° C. to perform a solid treatment on the bonding groove 410 , the main body 100 and the bonding member 200 may be bonded to each other by an adhesive.

Accordingly, since the bonding portion 400 is added to the shape of the uneven portion 300 , the coupling between the body 100 and the bonding member 200 may be further strengthened.

On the other hand, a configuration in which the body 100 and the bonding member 200 are more firmly coupled by the fastening means 500 may be possible.

As a configuration of the fastening means 500 , a fastening groove 510 and a fastening screw 520 are exemplified. That is, fastening grooves 510 corresponding to each other are formed in the body 100 and the bonding member 200, respectively, and the fastening screws 520 are fastened to these fastening grooves 510, so that the bonding member ( 200) may be structurally more firmly coupled. However, the present invention is not limited thereto. The fastening means 500 may employ a fastening method consisting of various configurations.

5 is a cross-sectional view for explaining another configuration of a dissimilar metal joined body part of a rolling mill roll according to an embodiment of the present invention.

Referring to FIG. 5 , in another configuration of the dissimilar metal assembly part of the rolling mill roll according to an embodiment of the present invention, it may be possible for the uneven portion 300 to be formed in a multi-stage shape. When the concave-convex portion 300 is formed in multiple stages, there is an effect that the left and right slip or flow is reliably prevented compared to the case where the concavo-convex portion 300 is formed in a single stage shape.

6 is a cross-sectional view for explaining another configuration of a dissimilar metal joined body part of a rolling mill roll according to an embodiment of the present invention.

Referring to FIG. 6 , in another configuration of a dissimilar metal joined body part of a rolling mill roll according to an embodiment of the present invention, the uneven portion 300 is formed in a shape symmetrical to each other on the body 100 and the bonding member 200 , respectively. It may be composed of a concave-convex groove 310 and a concave-convex protrusion 320 .

The concave-convex groove 310 has a shape recessed inward from the outer surface of the body 100 or the bonding member 200, and is formed to gradually increase in cross-sectional area toward the inner side, and the concave-convex protrusion 320 gradually increases toward the outside. It may be formed to have a shape with an increased cross-sectional area.

Referring specifically to the drawings, the concave-convex groove 310 has a shape recessed from the outer surface (upper surface in FIG. 6) to the inner (lower side in FIG. 6) of the body 100, and gradually increases in cross-sectional area toward the inside. can be formed. That is, as shown, the concave-convex groove 310 may be formed to have a trapezoidal cross-section.

Meanwhile, the concave-convex protrusion 320 is formed to protrude from the outer surface (the lower surface in FIG. 6 ) of the bonding member 200 to the outside (the lower side in FIG. 6 ), and may have a shape in which the cross-sectional area gradually increases toward the outside. That is, the concave-convex protrusion 320 may be formed to have a trapezoidal cross-section to correspond to the concave-convex groove 310 .

Accordingly, when the concave-convex protrusion 320 is inserted into the concave-convex groove 310 , the bonding member 200 and the body 100 may be firmly coupled to each other.

In FIG. 6 corresponding to another embodiment of the present invention, the case in which the concave-convex groove 310 is formed in the main body 100 and the concave-convex protrusion 320 is formed in the bonding member 200 is illustrated, but the present invention is limited thereto. it's not going to be Conversely, it may also be possible to form. That is, of course, a configuration in which the concave-convex groove 310 is formed in the bonding member 200 and the concave-convex protrusion 320 is formed in the body 100 is also possible.

7 is a cross-sectional view for explaining another configuration of a two-piece metal joined body part of a rolling mill roll according to an embodiment of the present invention.

Referring to FIG. 7 , in another configuration of the dissimilar metal assembly part of the rolling mill roll according to an embodiment of the present invention, the uneven portion 300 is formed in a shape symmetrical to each other on the body 100 and the bonding member 200 , respectively. It may have a configuration including a protrusion 330 and a receiving groove 340 to be used.

The receiving groove 340 includes a body groove 342 formed inside the body 100 or the bonding member 200 to form a predetermined space, and the body groove 342 and the body 100 or the bonding member 200 . It is formed between the outer surfaces and may include a neck hole 344 having a cross section smaller than that of the body groove 342 .

Referring in detail with reference to the drawings, the receiving groove 340 may be formed in the body 100 . And the body groove 342 may be formed inside the body 100 to have a rectangular cross-section as shown. Also, a neck hole 344 may be formed between the body groove 342 and the upper surface of the body 100 . That is, the neck hole 344 is a passage between the body groove 342 and the outside of the body 100 , and the cross section (left and right width) of this neck hole 344 is the cross section (left and right width) of the body groove 342 . It may have a smaller size.

The protrusion 330 is formed to protrude to the outside of the main body 100 or the bonding member 200, and is formed to have a shape symmetrical to the shape of the body groove 342 and the neck hole 344, respectively, to the body groove 342. It may consist of a body 332 and a neck 334 accommodated in the neck hole 344 and the like.

Referring to the drawings in detail, the protrusion 330 may be formed on the bonding member 200 . The body part 332 is formed to have a shape and size corresponding to the body groove 342 , and may be formed to have a rectangular cross section as shown. And the neck 334 is a portion connecting the body 332 and the bonding member 200, and the cross section (left and right width) of the neck portion 334 is smaller than the cross section (left and right width) of the body 332. can have

Therefore, when the protrusion 330 having the configuration as described above is inserted into the receiving groove 340 , the bonding member 200 may be firmly coupled to the body 100 . Of course, in order to have a configuration in which the protrusion 330 is inserted into the receiving groove 340 as described above, a bonding member 200 made of white metal or titanium is melted and inserted into the receiving groove 340 to form the protrusion 330 and It is desirable to have the same shape molded.

In the above, embodiments of the present invention have been described with reference to the accompanying drawings, but those of ordinary skill in the art to which the present invention pertains may practice the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

100: body
200: joint member
300: uneven part
310: concave-convex groove
320: uneven protrusion
330: protrusion
332: body
334: neck
340: receiving groove
342: body groove
344 : throat hole
400: bonding unit
410: bonding groove
500: fastening means
510: fastening groove
520: fastening screw

Claims (5)

In the rolling mill for rolling a steel plate,
a sleeve that wraps around the roll neck; and
A bushing bearing surrounding the sleeve,
The sleeve and the bushing bearing are each individually made of a dissimilar metal assembly,
The dissimilar metal junction is:
main body; and
It has a configuration including a bonding member joined by melting without an intermediate member on one surface of the body,
Concave-convex portions having a shape symmetrical to each other are formed on a surface where the body and the bonding member are in contact with each other,
A bonding portion for bonding the body and the bonding member to each other is further formed on the edge of the surface where the body and the bonding member are in contact with each other by solid processing, and
A rolling mill roll having a configuration in which the main body and the joining member are coupled to each other by fastening means. The method of claim 1,
The concave-convex portion has a configuration including concave-convex grooves and concavo-convex protrusions that are formed in a shape symmetrical to each other on the body and the bonding member, respectively,
The concave-convex groove has a shape recessed inward from the outer surface of the main body or the bonding member, and is formed to gradually increase in cross-sectional area toward the inside, and
The concave-convex projections are formed to protrude outward from the outer surface of the bonding member or the main body, and have a shape in which a cross-sectional area gradually increases toward the outside. The method of claim 1,
The concave-convex portion has a configuration including a protrusion and a receiving groove formed in a shape symmetrical to each other on the main body and the joining member, respectively,
The receiving groove is:
a body groove formed inside the body or the bonding member to form a predetermined space; and
a neck hole formed between the body groove and the outer surface of the main body or the bonding member and having a cross section smaller than that of the body groove, and
The protrusion is formed to protrude to the outside of the main body or the bonding member, and is formed in a shape symmetrical to the shape of the body groove and the neck hole, and includes a body part and a neck part accommodated in the body groove and the neck hole, respectively. rolling mill roll. The method of claim 1,
The concave-convex part is a rolling mill roll made of a multi-stage. The method of claim 1,
The bonding portion is a rolling mill roll in which the adhesive filled in the bonding groove formed by a chamfer on the edge of the surface in contact with the main body and the bonding member is cured.

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