JPH0623650U - Slab support device in continuous casting equipment - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to change the type of bloom ⇔ beam blank in a short time. [Structure] The right and left side surfaces of the bloom BL and the flange f of the beam blank BB are respectively provided on the first to third roll segments B to D arranged immediately below the mold along the casting path.
A pair of left and right flange rolls 11 capable of supporting the outer surface are provided by a flange cylinder 15 so that their positions can be adjusted toward and away from each other, and a pair of upper and lower webs capable of supporting the upper and lower surfaces of the bloom BL and the web w of the beam blank BB. A tip roll capable of adjusting the positions of the rolls 12 by web cylinders 18 so as to move toward and away from each other, and capable of supporting the upper and lower sides of the bloom BL and the flange f end face of the beam blank BB on the left and right sides of the web roll 12. 13 are provided by the tip cylinder 20 so that their positions can be adjusted in the directions in which they approach and separate from each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a slab support device for guiding and supporting a slab in a predetermined range from immediately below the mold in a continuous casting facility of a vertical type or a vertical curved type that also serves as a bloom / beam blank.

[0002]

[Prior art]

 Conventionally, in continuous casting equipment for beam blanks with square cross section and H-shaped cross section, when changing molds between bloom and beam blank, a plurality of roll segments (dedicated segment) immediately below the mold (mold) and following it. It was necessary to replace all of them. For example, in the case of a beam blank (width 480 x height 400 x web length 120) and bloom (thickness 250 x width 420) (unit: mm), the mold and NO1 segment are lifted by a crane to lift NO2, NO3. The segment was pulled out by an exchange trolley, and a new mold and NO1 segment and NO2 and NO3 segment were carried in and assembled.

[0003]

[Problems to be solved by the device]

 However, the above segment replacement work required about 6 to 8 hours, which forced the suspension of operations.

It is an object of the present invention to solve the above problems and provide a slab support device in a continuous casting facility in which the mold change between bloom and beam blank can be performed in a short time.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the slab support device in the continuous casting equipment of the present invention is provided with a plurality of roll segments arranged immediately below the mold along the slab guide path, on the left and right side surfaces of the bloom and the beam. A pair of left and right flange rolls that can support the outer flange surface of the blank are provided so that their positions can be adjusted toward and away from each other, and a pair of upper and lower web rolls that can support the upper and lower surfaces of the bloom and the beam blank web are separated from each other. The tip rolls that can support the upper and lower sides of the bloom and the flange end faces of the beam blanks are provided on the left and right sides of the web roll so that they can be moved toward and away from each other. is there.

[0006]

[Action]

 According to the above configuration, the flange rolls are moved toward and away from each other to set the horizontal width of the bloom or the width between the flanges of the beam blank, and the web rolls are moved toward and away from each other to increase or decrease the height of the bloom or the web of the beam blank. It is possible to guide and support the bloom and the beam blank respectively by setting the thickness, and further moving the tip rolls toward and away from each other to set the vertical height of the bloom or the flange width of the beam blank. Therefore, when changing the bloom ⇔ beam blank, it is only necessary to set the distance between the flange roll, the web roll, and the tip roll, and the roll segment replacement work that was required in the past is no longer necessary, and the mold change work can be performed quickly. be able to. Moreover, since each roll segment is equipped with a tip roll that guides the slab on both sides of the web roll, it is possible to sufficiently support the bulging force during bloom casting and reliably prevent breakout and bulging distortion. be able to.

[0007]

【Example】

 An embodiment of a vertical-curve continuous casting facility for both bloom and beam blank according to the present invention will be described below with reference to the drawings.

In FIGS. 3 and 4, reference numeral 1 denotes a mold to which a molten metal is supplied from a tundish (not shown) through a nozzle, and a mold supporting frame A and a mold 1 are provided directly below the mold 1. An integrated foot roll 3 is arranged. Then, in the casting path 4 that continues downward from the mold 1 through the foot roll 3, the first to third roll segments B to D having the support roll 5 and the fourth to fourth roll segments having the guide roll 6 are provided. Five roll segments E and F are arranged in order from the mold 1, and a cast piece guide portion G having a pinch roll 7 and a guide roll 8 is arranged on the downstream side of the fifth roll segment F.

As shown in FIG. 5A, the foot rolls 3 provided on the mold support frame A are flange foot rolls 3a, 3a and web foot rolls 3b that can support and guide eight surfaces of the beam blank BB. , 3b and tip foot rolls 3c, 3c are provided with a plurality of dedicated rolls for the beam blank BB, or, as shown in FIG. 5 (b), upper and lower sides capable of supporting and guiding the four sides of the bloom BL. Plural sets of rolls for exclusive use of the bloom BL, including the foot rolls 3d and 3d and the left and right foot rolls 3e and 3e, are arranged.

The support rolls 5 of the first to third roll segments B to D are configured as dual-purpose rolls that respectively support and guide the four surfaces of the bloom BL and the eight surfaces of the beam blank BB. As shown in FIG. 1 and FIG. 2, the frames of the first to third roll segments B to D are positionally adjustable in the directions of approaching and separating from each other and can support the left and right side surfaces of the bloom BL and the outer surface of the flange f of the beam blank BB. A pair of right and left flange rolls 11 and a pair of upper and lower web rolls 12 that can adjust the positions in the direction of approaching and separating from each other and can support the upper and lower central portions of the bloom BL and the web w of the beam blank BB. The positions of the left and right sides can be adjusted toward and away from each other. The tip roll 13 capable of supporting the end surface of the die f is arranged at the same cross-section position or different cross-section position of the mold.

That is, in the flange roll 11, the piston rods 15 a are arranged on the left and right side frames 14 and the hydraulic flange cylinders 15 are arranged so that the piston rods 15 a can pass through the side frames 14 and move toward and away from the casting path 4. The piston rod 15a is rotatably supported on the tip end of the piston rod 15a via a flange roll support member 16. In the web roll 12, the piston rod 18a penetrates through the upper and lower frames 17 and the hydraulic web cylinders 18 that can freely move back and forth on the casting path 4 side are arranged. Is rotatably supported via a web roll supporting member 19. Further, the tip roll 13 is provided with hydraulic tip cylinders 20 on the left and right sides of the upper and lower frames 17, respectively, in which the piston rods 20a can freely move toward and away from the casting path 4 side, and connect the tip portions of the left and right piston rods 20a. A pair of left and right chip roll support members 22 are attached to the member 21 and are rotatably supported by the chip roll support members 22. The connecting member 21 is formed with a through hole 21a through which the web roll supporting member 19 moves in and out. Although the cylinders 15, 18 and 20 for moving the rollers in and out are hydraulic cylinders, they may be air cylinders or screw type jacks.

The guide rolls 6 of the fourth and fifth roll segments E and F are configured as dual-purpose rolls capable of supporting and guiding the bloom BL and the beam blank BB, respectively, as shown in FIG. As shown in b), a pair of left and right guide rolls 23 are provided on the frames of the fourth and fifth roll segments E and F, the positions of which are adjustable in the directions of approaching and separating from each other and which support the outer surface of the flange f of the beam blank BB. And a pair of upper and lower guide rolls 24 whose upper side is positionally adjustable in the vertical direction and which can support the upper and lower surfaces of the bloom BL and the flange f end surface of the beam blank BB.

The slab guide portion G is composed of dedicated two-sided support rolls that have a bloom BL and a beam blank BB, respectively. As shown in FIG. 7A, the beam blank BB has A plurality of pinch rolls 7a and guide rolls 8a for guiding and supporting and transporting the end surface of the flange f are arranged, or as shown in FIG. 7B, pinch rolls 7b for guiding and supporting the upper and lower surfaces of the bloom BL. And a plurality of guide rolls 8b are arranged.

The casting operation in the continuous casting facility will be described. When casting the beam blank BB, a mold support frame A having the mold 1 and the foot roll 3 corresponding to the beam blank BB to be cast is installed in the casting path 4. Then, the flange cylinder 15 is moved back and forth to move the flange roll 11 to set the distance between the flange rolls 11 to the outer surface distance of the flange f, and at the same time, the web cylinder 18 is advanced to project and move the web roll 12. Then, the interval between the web rolls 12 is set to the thickness of the web w, and the chip cylinder 20 is further retracted to move the chip roll 13 to set the interval between the chip rolls 13 to the width of the flange f 1.

Then, when casting is started, the slab of the beam blank BB is continuously formed and sent downward from the mold 1, and the first and second roll segments B to D are provided to the foot roll 3 from immediately below the mold. Eight sides are supported by the support rolls 5, respectively, so that the bulging force of the internal molten metal is reliably retained and deformation is prevented. Further, in the slab guide portion G from the fourth to fifth roll segments E and F, the outer surface of the flange f and the end surface of the flange f are guided by the guide roll 6 and also supported by the pinch roll 7 and the guide roll 9. Be pulled out.

Next, when casting the bloom BL, after carrying out the mold supporting frame A for the beam blank BB, carrying in the mold supporting frame A carrying the mold 1 and the foot roll 3 corresponding to the bloom BL. And install it in the casting route. Then, the flange cylinders 15 are used to set the distance between the flange rolls 11 to the width of the bloom BL, and the web cylinders 12 are retracted by retracting the web cylinders 18 to bring the distance between the web rolls 12 to the height of the bloom BL. Then, the interval between the chip rolls 13 is set to the height of the bloom BL by the chip cylinder 20.

Then, when casting is started, a cast piece of the bloom BL is continuously formed and sent downward from the mold 1, and the foot rolls 3 and the support rolls are formed at the first and second roll segments B to D immediately below the mold. The four surfaces are respectively supported by 5, and the bulging force by the internal molten metal is reliably held and deformation is prevented. Further, in the slab guide portion G from the fourth to fifth roll segments E and F, the upper and lower surfaces of the bloom BL are supported by the guide roll 6 and the pinch roll 7 and the guide roll 9, respectively, and pulled out.

[0018]

[Effect of device]

 As described above, according to the present invention, the flange rolls are moved toward and away from each other to set the width of the bloom horizontally or between the flanges of the beam blank, and the web rolls are moved toward and away from each other to increase or decrease the height of the bloom. The bloom and beam blank can be guided and supported respectively by setting the web thickness of the beam blank and further moving the tip rolls toward and away from each other to set the vertical height of the bloom or the flange width of the beam blank. . Therefore, when changing the bloom ⇔ beam blank, it is only necessary to set the distance between the flange roll, the web roll and the tip roll, and the roll segment replacement work that was required in the past is no longer necessary, and the mold change work can be performed quickly. be able to. In addition, since each roll segment is equipped with a tip roll that guides the slab on both sides of the web roll, the bulging force during bloom casting can be sufficiently supported, and breakout and bulging distortion can be reliably prevented. can do.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a support roll in a continuous casting facility according to the present invention when casting a beam blank.

FIG. 2 is a cross-sectional view of the same support roll during bloom casting.

FIG. 3 is an overall side view showing a roll arrangement of a casting path of the continuous casting facility.

FIG. 4 is an overall side view showing a roll arrangement under a mold in a casting path of the continuous casting facility.

FIG. 5 is a transverse cross-sectional view showing the arrangement of foot rolls in the continuous casting facility, (a) is during beam blank casting, and (b) is during bloom casting.

FIG. 6 is a cross-sectional view showing the arrangement of guide rolls of the continuous casting facility, (a) is during beam blank casting, and (b) is during bloom casting.

FIG. 7 is a cross-sectional view showing the arrangement of pinch rolls and guide rolls of the continuous casting facility, (a) at the time of beam blank casting, and (b) at the time of bloom casting.

[Explanation of symbols]

 A Mold support frame B 1st roll segment C-F 2nd-5th roll segment G Cast strip guide part BL Bloom BB Beam blank f Flange w Web 1 Mold 3 Foot roll 4 Casting path 5 Support roll 6 Guide roll 7 Pinch roll 8 Guide roll 11 Flange roll 12 Web roll 13 Chip roll 15 Flange cylinder 18 Web cylinder 20 Chip cylinder

Claims (1)

[Scope of utility model registration request] 1. A direction in which a pair of left and right flange rolls capable of supporting the left and right side surfaces of a bloom and the flange outer surface of a beam blank are respectively brought close to and separated from each other on a plurality of roll segments arranged immediately below the mold along a slab guide path. And a pair of upper and lower web rolls capable of supporting the upper and lower surfaces of the bloom and the beam blank web are positionally adjustable in a direction in which the web rolls approach and separate from each other. A slab supporting device in a continuous casting facility, wherein chip rolls capable of supporting both lower surfaces and a flange end surface of a beam blank are provided so that their positions can be adjusted in directions of approaching and separating from each other.