KR20030054628A - Feeding roll system of plate top-bottom turning - Google Patents

Abstract

PURPOSE: An apparatus for turning over a rolling plate is provided to uniformly maintain a temperature distribution in upper and lower surfaces of the rolling plate by turning over the rolling plate when the rolling plate is positioned at an outlet part of a rolling mill. CONSTITUTION: A rolling plate(300) is supported by lower conveying rolls(301-304). A plurality of upper conveying rolls(305-308) are adhered to the rolling plate(300) as a conveying roll lifting motor(315) operates so that the rolling plate(300) is fixed. A plurality of supporting rolls(317) are installed in a rotor(310) in order to support the rolling plate(300). The supporting rolls(317) are provided to prevent the rolling plate(300) from being dropped between the conveying rolls. A lateral fixing member is provided to fix both ends of the rolling plate(300). The lateral fixing member is rotated when the rotor(310) rotates. The rotor(310) is supported on a base by means of a supporter.

Description

Feeding roll system of plate top-bottom turning}

The present invention relates to a top and bottom reverse apparatus of a rolled sheet, and more particularly, to an apparatus for reversing the top and bottom surfaces of a rolled sheet at the exit side of a rolling mill during thick plate finish rolling.

In general, the thickness of the rolled plate is thick and the temperature is high during finishing finishing of the thick plate, so that a significant temperature difference occurs between the upper and lower surfaces of the rolled plate, which causes deformation of the sheet and ends the rolling after using the accelerated cooling equipment. Warping occurs in the product sheet.

In order to solve this problem, conventionally, a method such as that of spraying cooling water on the lower surface of the rolled plate is employed. That is, as shown in Figure 1, the cooling water is injected through the cooling water injection nozzles (101, 102) respectively located on the upper and lower surfaces of the rolling plate 100, the cooling water injected from the upper surface of the rolled plate The cooling water sprayed from the lower surface does not stay on the lower surface of the rolled sheet due to gravity, but falls immediately, so that temperature deviations occur between the upper surface and the lower surface of the rolled sheet.

Through the conventional method as described above, it is difficult not only to generate a uniform temperature distribution over the entire lower surface of the rolled plate, but also to reduce the temperature deviation with the upper surface.

Accordingly, the present invention has been made in order to solve the problems of the prior art as described above, when the rolling plate is located on the exit side of the rolling mill to reverse the upper and lower surfaces of the rolling plate to be rolled by the upper and lower surfaces of the rolling plate An object of the present invention is to provide a top and bottom reversing apparatus of a rolled plate capable of maintaining a uniform temperature distribution and plastic deformation.

Figure 1 is a schematic diagram showing a method for controlling the upper and lower temperature deviation of the rolled plate according to the prior art,

Figure 2a is a schematic diagram showing a state in which the rolling plate comes out to the exit side of the rolling mill after rolling to lie on the lower feed roll to explain the present invention,

Figure 2b is a schematic diagram showing a process of fixing the upper surface of the rolled sheet rolled down set in the state of Figure 2a,

Figure 2c is a schematic diagram showing a state in which the side holder fixed the side of the rolled plate in the state of Figure 2b,

FIG. 2D is a schematic diagram showing a state in which the rolled plate reenters the rolling mill after being reversed by rotating 180 ° in the state of FIG. 2C,

Figure 3a is a perspective view showing in detail the important components of the upper and lower reversing apparatus of the rolled plate according to an embodiment of the present invention,

Figure 3b is a schematic front view showing the upper and lower reversing apparatus of the rolled plate according to the present invention in the traveling direction of the rolled plate,

4A is a schematic diagram showing a state where the upper and lower surfaces of the rolled plate are reversed through the reversing apparatus shown in FIG. 3B;

4B is a schematic diagram illustrating a state where the upper and lower surfaces of the rolled plate are inverted through the inversion device shown in FIG. 3B.

♠ Explanation of symbols on the main parts of the drawing ♠

300: rolled plate 301 to 304: lower feed roll

305 to 308: upper feed roll 310: rotating body

311: toothed gear 312: vertical feed gear

313: vertical feed motor 314: support

315: feed roll lifting motor 316: ball screw

317: support roll 320: support

321: ball bearings 322, 323: guide member

An apparatus of the present invention for achieving the above object, the rotating body surrounding the rolled plate in the width direction, a support for rotatably supporting the rotating body, the rotating means for rotating the rotating body in the circumferential direction, and the rotation A pair of upper and lower feed rolls fixed to the whole side to be able to lift and lower to support or fix the upper and lower surfaces of the rolled plate at positions opposite to each other, and lifting means for raising and lowering the upper and lower feed rolls up and down; do.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the upper and lower reversing apparatus of the rolled plate according to the present invention will be described in detail.

Figure 2a is a schematic diagram showing a state in which the rolling plate to the exit side of the rolling mill after rolling to lie on the lower feed roll for explaining the present invention, Figure 2b is a top feed roll set is lowered in the state of Figure 2a the upper surface of the rolling plate It is a schematic diagram showing the process of fixing. 2C is a schematic view showing a state in which the side holders fix the side surface of the rolled plate in the state of FIG. 2B, and FIG. 2D shows a state in which the rolled plate reenters the rolling mill after being rotated by 180 ° in the state of FIG. 2C. One schematic.

As shown in Fig. 2A to Fig. 2D, the upper and lower reversing apparatus of the rolled plate of the present invention is the upper feed rolls (205 to 208) when the rolled plate 200 is located on the exit side of the rolling mill in the middle of the rolling pass (Fig. 2A). When the set is lowered to fix the upper surface of the rolled plate 200 (FIG. 2B), and the side holders 209 positioned on both sides operate to fix the side of the rolled plate 200 (FIG. 2C), rolling After the plate 200 is rotated 180 ° in place to reverse the upper and lower surfaces of the rolled plate, the lower set of feed rolls 201 to 204 is separated from the lower surface of the inverted rolled plate, and the side stand is formed from the side of the rolled plate. When 29 is separated, the rolled plate 200 in an inverted state is configured to reenter the rolling mill along the set of upper feed rolls 205 to 208 (FIG. 2D).

The rolling plate upper and lower surface reversing apparatus of this invention consists of two sets of reversing apparatus which fixes and rolls a rolling plate. Therefore, only one set of reversing apparatus will be described in detail.

Figure 3a is a perspective view showing in detail the important components of the upper and lower reversing device of the rolled plate according to an embodiment of the present invention, Figure 3b is a top and bottom reversing device of the rolled plate according to the present invention in the direction of the rolling plate One schematic front view.

As shown in Figures 3a and 3b, the reversing apparatus of the present invention includes a rotating body 310 surrounding the rolled plate 300 in the width direction. A toothed gear 311 is formed on the entire center circumferential surface of the rotating body 310 at equal intervals. The toothed gear 311 is engaged with the vertical feed gear 312 which is located on the circumferential surface of the rotating body 310 and operates up and down. The vertical feed gear 312 is operated by the vertical feed motor 313 or the hydraulic cylinder to operate up and down. Therefore, the vertical feed gear 312 is operated up and down by the force of the motor 313 or the hydraulic cylinder, meshes with it to rotate the rotating body 310.

In addition, the support portions 314 are formed to protrude from each of the two side surfaces of the rotor 310 at the same predetermined intervals up and down with respect to the horizontal center line. The support roll lifting motor 315 which raises and lowers the upper feed roll 305 and the lower feed roll 301 up and down is fixed to this support part 314, respectively. At this time, the upper feed roll 305 and the lower feed roll 301 are installed in positions opposite to each other with the rolling plate 300 up and down.

And, a pair of ball screws for transmitting the force to the choke box 305a of the upper feed roll 305 and the choke box 301a of the lower feed roll 301 on the rotary shaft of the feed roll lowering motor 315 ( 316). Therefore, the upper feed roll 305 and the lower feed roll 301 is moved up and down in accordance with the operation of the feed roll lifting motor 315.

That is, referring to Figure 3a, the rolling plate 300 supported by the lower feed rolls (301 to 304) is fixed by the upper feed rolls (305 to 308) in close contact with the operation of the feed roll lifting motor 315. .

In addition, the upper feed roll 305 and the lower feed roll 306 and the lower feed roll 302 located on the side of the rotating body 310 facing the lower feed roll 301 also through the same configuration as described above the upper and lower parts Ascend and descend. In the choke boxes of the upper and lower feed rolls 301 to 308, drive motors for driving the upper and lower feed rolls, respectively, are provided.

In the rotating body 310, a plurality of support rolls 317 are provided to support the rolling plate 300 in the width direction in the upper and lower portions, respectively. The support roll 317 is always fixed in place, and is installed to prevent the rolling plate 300 from being separated between the transfer rolls as the interval between the transfer rolls 301 and 302, 303 and 304 becomes wider. .

In addition, the present invention is provided with a side stand (not shown) for tightly fixing both end surfaces of the rolled plate (300). The side holder is configured to closely fix the end surface of both ends of the rolling plate 300 through a conventional pressing principle, the rotating body 310 is configured to rotate together when rotating.

The rotating body 310 as described above is supported on the base by a support 320 as shown in Figure 3b. The support 320 serves to support the rotatable body 310 to rotate smoothly, and a plurality of ball bearings 321 are installed on an inner surface thereof. In addition, the guide members 322 and 323 for guiding the rotatable body 310 to rotate smoothly without shaking are provided to contact the circumferential surface of the rotatable body 310 at a predetermined position.

In the following, the operating relationship of the present invention configured as described above will be described in detail.

4A is a schematic diagram showing a state where the upper and lower surfaces of the rolled plate are reversed through the reversing apparatus shown in FIG. 3B, and FIG. 4B is a schematic diagram showing a state where the upper and lower surfaces of the rolled plate are reversed through the reversing apparatus illustrated in FIG. 3B.

First, as illustrated in FIGS. 3A and 3B, when the rolling plate 300 is positioned at the exit side of the rolling mill in the middle of the rolling pass, and the rolling plate 300 is positioned on the lower transfer rolls 301 to 304, the upper transfer roll The feed roll lowering motor 315 which raises and lowers 305 to 308 is operated. Then, the upper feed roll (305 ~ 308) is lowered to press the upper surface of the rolled plate (300). In this state, the close fixture (not shown) operates to fix the both ends of the rolled plate 300 in close contact. Then, the rolled plate 300 has a form that is firmly fixed.

In this state, as illustrated in FIG. 4A, the vertical feed gear 312 is lowered through the vertical feed motor 313. Then, the toothed gear 311 engaged with the up and down feed gear 312 rotates so that the rotor 310 rotates as a whole. When the rotor 310 rotates by 180 °, the operation is stopped. Then, the upper and lower surfaces of the rolled plate 300 is completely reversed as shown in FIG. 4B.

Then, the feed roll lowering motor 315 for elevating the reversed lower feed rolls 301 to 304 is operated. Then, the lower feed rolls 301 to 304 are lifted upward to separate from the rolled plate 300, and the adhesion holder is separated from both end faces of the rolled plate 300. In this reversed state, the rolled plate 300 is supported by the upper feed rolls 305 to 308, and the rolled plate 300 is operated by an operation of a driving motor (not shown) respectively positioned in the choke box of the upper feed roll. Reenters the mill in an inverted state.

As described in detail above, the upper and lower reversing apparatus of the rolled plate according to the present invention may be rolled by reversing the upper and lower surfaces of the rolled plate when the rolled plate is located at the exit side of the rolling mill, thereby causing temperature distribution and plastic deformation of the upper and lower surfaces of the rolled plate. It is effective to keep it uniform.

Although the technical details of the upper and lower surface reversing apparatus of the rolled plate of the present invention have been described together with the accompanying drawings, this is illustrative of the best embodiments of the present invention and is not intended to limit the present invention.

In addition, it is obvious that any person skilled in the art can make various modifications and imitations within the scope of the appended claims without departing from the scope of the technical idea of the present invention.

Claims (4)

In the apparatus for reversing the upper and lower surfaces of the rolled plate on the exit side of the rolling mill during thick plate finishing rolling, A rotating body wrapping the rolled plate in a width direction, a support for rotatably supporting the rotating body, a rotating means for rotating the rotating body in the circumferential direction, and being fixed to a side of the rotating body so as to be lowered and lowered; The upper and lower reversing apparatus of the rolled plate, comprising: a pair of upper and lower feed rolls for supporting or fixing the upper and lower surfaces of the rolled plate at positions facing each other, and elevating means for raising and lowering the upper and lower feed rolls up and down. . According to claim 1, wherein the rotating means is a toothed gear is formed at equal intervals along the center peripheral surface of the rotating body, the vertical gear and the upper and lower feed gear to operate up and down in engagement with the toothed gear, the vertical feed gear up and down Upper and lower reversing apparatus of the rolled plate, characterized in that it comprises a transfer motor or a hydraulic cylinder to operate. According to claim 1, The elevating means is the elevating motor is fixed to the support portion protruding on the side of the rotating body, and the ball screw for transferring the lifting force of the elevating motor to the upper and lower feed rolls respectively to elevate Upper and lower reversing apparatus of the rolled sheet comprising a. The top and bottom reversing apparatus according to any one of claims 1 to 3, wherein a plurality of supporting rolls are provided inside the rotor to support the rolled plate in the width direction, respectively.