JP2005211981A - Spacer changing unit for changing roller apron spacing in continuous casting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spacer changing unit for changing the spacing between roller aprons which is intended to guide a cast piece in continuous casting equipment. <P>SOLUTION: In the change of a roller apron spacing in a continuous casting machine, an upper moving frame whereby upper rolls are arranged and supported, a lower fixed frame whereby lower rolls are arranged and supported, a column shaft which is screwed/fixed via nuts to the lower fixed frame, and the upper moving frame which is so integrated that the up-and-down movement is guided by the column shaft, are connected and integrated with two pairs of connecting frames where each pair of hydraulic cylinders are installed at the upper end of the column shaft, so that the spacing between the upper roll and lower roll is optionally established. After a spacer is inserted between the upper moving frame and the lower fixed frame, the upper moving frame is made to descend to make a contact bonding with the spacer, so that the spacing between rolls is changed to any arbitrary thickness. The spacer changing unit for changing the roller apron spacing in the continuous casting machine makes the spacer work together with each motion of the travelling and up-and-down movement on the lower fixed frame to enable carrying-in/carrying-out of the spacer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a spacer exchanging device for changing the interval of a roller apron aimed at a slab guide for a continuous casting facility.

  In general, as a slab guide for a continuous casting facility, as shown in FIGS. 8 and 9, two dipping nozzles 2 having a predetermined interval t are attached to one tundish 1, and each dipping nozzle 2 is attached. The cast slabs 4 that are solidified by injecting molten steel into the molds 3 are drawn through the roller apron 5 for supporting and guiding. That is, FIG. 8 is a side view of a main part of a conventional continuous casting machine for slab manufacturing, and FIG. 9 is a schematic view of a main part of a roller apron for supporting and guiding a slab of the conventional continuous casting machine for slab manufacturing. .

  Further, as shown in FIG. 9, the plurality of roller aprons 5 are provided on the foundation with the extraction guide rails 6 for pulling them off for maintenance on the foundation at a position perpendicular to the casting direction. It can be pulled out using tools, the space between the roller apron 5 and the extraction guide rail 6 is limited, there are limits to the types of spacer thickness in the past, and the work when changing the thickness is complicated. There is a problem that it takes time. Reference numeral 7 denotes a roller apron fixing frame.

  As a method for adjusting the roll interval of the roller apron of the conventional continuous casting equipment, it has a structure in which a spacer is inserted between the upper frame and the lower frame. A spacer is inserted in the gap. Further, as disclosed in, for example, Japanese Patent Application Laid-Open No. 8-206802 (Patent Document 1), a roller apron is provided on an upper fixing frame, and has a lower cylinder having an upper telescopic rod screwed and fixed by a nut. Connect the telescopic rod, and the stroke adjusting member with spacers with different thicknesses is slidably guided by the guide provided on the cylinder body of the reduction cylinder. A slab guide roll segment has been proposed in which the upper telescopic rod is moved down and the nut is brought into contact with the spacer so as to change to an arbitrary roll interval.

JP-A-8-206802

The above-described conventional method for adjusting the roll interval of the roller apron is a method of manually inserting a spacer between the upper moving frame and the lower fixed frame, and thus has the following problems.
(1) Every time the casting thickness is changed, the distance between the upper and lower rolls of, for example, a dozen roller aprons provided on one strand must be changed. It takes time to become a bottleneck in production.
(2) Since the roller apron roll interval is composed of a dozen roller apron, the thickness varies depending on the installation location, and in addition to the spacer body, minute adjustment work with shims occurs, making the work complicated Is inviting.

  Furthermore, in the technique described in Patent Document 1, a spacer having a different thickness is provided by connecting a lower telescopic rod provided on an upper fixed frame and having a lower telescopic rod having an upper telescopic rod to which a nut is screwed and fixed. This is a method in which the stroke adjusting member that has the guide is moved by the lowering cylinder and moved below the nut, and the upper telescopic rod is lowered to bring the nut into contact with the spacer. The number and length are limited to the extent that they do not protrude from the roller apron body. That is, if the spacer is further increased in order to change the thickness, the spacer protrudes from the main body of the roller apron, so that the spacer interferes with a guide rail described later.

  In order to solve the above-described problems, the inventors have made extensive developments. As a result, the present invention has been set in advance so that spacer insertion work that has been conventionally performed manually can be performed by remote control. A spacer, a holder for holding the spacer, a lifting guide and a lifting cylinder for supporting and lifting the spacer and the holding tool, a traveling cylinder for moving the head forward and backward, and a traveling of the lifting body for holding and lifting the spacer are guided. By attaching an automatic spacer exchanging device composed of a traveling guide section to the roller apron side, it is possible to shorten the time for exchanging the spacer for adjusting the roll interval, which has been performed manually.

  The gist of the invention is that an upper moving frame in which the upper rolls are arranged and supported, and a lower fixed frame in which the lower rolls are arranged and supported so that the roll interval between the upper roll and the lower roll can be arbitrarily set in the continuous casting machine. A column shaft screwed and fixed to the lower fixed frame via a nut, and the upper moving frame incorporated so as to be guided to move up and down by the column shaft. It is connected and integrated by two pairs of joint frames provided with a pair of hydraulic cylinders. After inserting a spacer between the upper moving frame and the lower fixed frame, the upper moving frame is lowered and the spacer is crimped. When changing the roller apron interval of a continuous casting machine that changes the roll interval to an arbitrary thickness, the spacer moves on the lower fixed frame, and the loading and lifting operations are linked to each other. Spacer exchange device for a roller apron interval changes caster characterized by possible and were it a certain.

  As described above, according to the present invention, the spacer replacement work that has been performed manually in the past can be remotely automated, so that the work time for spacer replacement can be greatly shortened, and the spacer replacement time is shortened. Therefore, productivity in the continuous casting machine increases. In addition, when installing the roller apron, the automatic changer for the spacer, which is equipped with a compact lifting / running function for mounting the spacer according to the present invention on the lower frame, is easily installed on the roller apron side. The roller apron and the extraction guide rail can be easily implemented without interfering with each other at the time of take-off in the off-line state.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view of a roller apron of a continuous casting facility, and FIG. 2 is a side view of the roller apron of the continuous casting facility. As shown in FIG. 1 and FIG. 2, as a method for adjusting the roll interval of the roller apron of the continuous casting equipment, the upper roll 8 is arranged and supported so that the roll interval between the upper roll 8 and the lower roll 9 can be arbitrarily set. A movable frame 10, a lower fixed frame 11 in which the lower roll 9 is arranged and supported, a column shaft 12 that is screwed and fixed to the lower fixed frame 11 via a nut, and the column shaft 12 is guided to ascend and descend. The upper moving frame 10 incorporated so as to be connected and integrated by two pairs of joint frames 14 provided with a pair of lifting hydraulic cylinders 13 at the upper ends of the column shafts 12, respectively. After inserting the spacer 15 between the lower fixed frame 11 and the lower moving frame 11, the upper moving frame 10 is lowered and the spacer 15 is pressure-bonded so that the roll interval can be arbitrarily set. It consists of the configuration to be modified to be. Reference numeral 16 denotes a support fitting, 17 denotes a pin, and 18 denotes a nut.

  FIG. 3 is a schematic view of the spacer automatic insertion device according to the present invention. FIG. 3A is a side view, and FIG. 3B is a schematic view of a roller apron showing a positional relationship for inserting a spacer. FIG. 4 is a plan view of the spacer automatic insertion device according to the present invention. 4A is a plan view, and FIG. 4B is a cross-sectional view of the roller apron. As shown in Fig. 3 and Fig. 4, when changing the roller apron interval of the continuous casting machine, the spacer is held on the lower fixed frame so that it can be carried in and out in conjunction with the movements of the lower fixed frame. In order to raise and lower the elevating body 20 having the spacer holder 19 by incorporating a spacer in the tool 19, the elevating body 20 supported by the elevating support pin 22 by the operation of the elevating cylinder 21 is provided with the elevating guide 23 and the guide. The lifting body 20 operates up and down via the rod 24. The spacer holder 19 is lifted and lowered simultaneously by the lifting and lowering body 20.

  On the other hand, the traveling body 25 is configured to be able to move back and forth on a traveling guide 30 installed on a base 29 by the operation of a traveling cylinder 28 connected by a cylinder end fitting 27 via a traveling support pin 26. Reference numeral 31 denotes a lifting frame, 32 denotes a trunnion receiver, and 33 denotes a traveling guide. FIG. 5 is a detailed view of the spacer holder, FIG. 5 (a) is an overall view of the spacer holder, FIG. 5 (b) shows the spacer, and FIG. The spacer is inserted into the main body of the spacer holder in a state where the spacer is protected up and down.

  That is, the spacer 15 shown in FIG. 5B is inserted between the upper and lower spacer waist folding prevention plates 34 shown in FIG. 5C in the insertion portion 35 composed of the spacer holder 19 shown in FIG. The spacer 15 is inserted into the insertion portion 35 with the spacer 15 interposed therebetween. In that case, it is desirable that the width X of the spacer waist folding prevention plate 34 is made smaller than the inner width Y of the spacer holder 19 so as not to interfere with the lower fixed frame 11.

  FIG. 6 is an explanatory diagram of fluctuations in roll interval according to the present invention. FIG. 6A shows the case of the minimum roll interval, and the upper moving frame 10 is fixed on the lower fixed frame 11 without inserting a spacer between the upper roll 8 and the lower roll 9. FIG. 6B shows a case where the roll interval is maximum, and shows a state where the upper moving frame 10 is fixed on the lower fixed frame 11 with the spacer 15 inserted between the upper roll 8 and the lower roll 9. .

  FIG. 7 is an explanatory diagram of spacer delivery according to the present invention. In FIG. 7A, the spacer 15 sandwiched between the spacer waist folding prevention plates 34 is inserted into the insertion portion 35 of the spacer holder 19. The spacer 15 is placed on a spacer holder 19, and the spacer holder 19 is bolted to a head portion composed of an elevating cylinder 21 and an elevating guide 23.

  Next, in FIG. 7B, the spacer holder 19 is lowered and the spacer 15 is placed at the position of the lower fixing frame 11. After that, as shown in FIG. 7C, the spacer holder 19 is lowered and the spacer 15 sandwiched between the spacer buckling prevention plates 34 is placed on the lower fixed frame 11 and separated from the spacer holder 19. Then, the spacer holder 19 is retracted, and only the spacer waist folding prevention plate 34 and the spacer 15 are set on the lower fixed frame 11.

Here, since the spacer 15 is put on the spacer holder 19, when the spacer 15 is inserted between the upper moving frame and the lower fixed frame and then the upper moving frame is lowered, the spacer 15 is pushed down and the spacer 15 is pushed down. Consideration is given so that an abnormal load does not act on the traveling body 25 through the holder 19.
When the spacer 15 is not necessary, the elevating cylinder 21 can be lifted to pick up the spacer 15 from the lower fixed frame 11 and then retracted using the traveling cylinder 28.

  Four sets of roll interval adjusting devices capable of remotely operating the spacer insertion / removal operation as described above are arranged opposite to the four column shafts of one set of roller apron. In addition, in one roller apron, the reduction amount can be controlled by making a difference in the spacer thickness between the two upstream units and the two downstream units. In addition, by reducing the thickness of the spacer with continuity for each of a plurality of segments (roller apron), light reduction can be performed.

It is a top view of the roller apron of a continuous casting equipment. It is a side view of the roller apron of a continuous casting equipment. It is the schematic of the spacer automatic insertion apparatus which concerns on this invention. It is a top view of the spacer automatic insertion apparatus which concerns on this invention. It is detail drawing of a spacer holder. It is explanatory drawing of the roll space | interval fluctuation | variation which concerns on this invention. It is explanatory drawing of the spacer delivery based on this invention. It is a principal part side view of the conventional continuous casting machine for slab manufacture. It is the principal part schematic of the roller apron which supports and guides the slab of a continuous casting machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tundish 2 Immersion nozzle 3 Mold 4 Slab 5 Support guide roller apron 6 Extraction guide rail 7 Roller apron fixed frame 8 Upper roll 9 Lower roll 10 Upper moving frame 11 Lower fixed frame 12 Column shaft 13 Lifting hydraulic cylinder DESCRIPTION OF SYMBOLS 14 Joint frame 15 Spacer 16 Support metal fitting 17 Pin 18 Nut 19 Spacer holder 20 Lifting body 21 Lifting cylinder 22 Lifting support pin 23 Lifting guide 24 Guide rod 25 Traveling body 26 Traveling support pin 27 Cylinder tip bracket 28 Traveling cylinder 29 Base 30 Traveling Guide 31 Elevating frame 32 Trunnion receiver 33 Travel guide 34 Spacer buckling prevention plate 35 Insertion section


Patent applicant: Nippon Steel Corporation
Attorney Attorney Shiina and others 1

Claims (1)

In order to be able to arbitrarily set the roll interval between the upper roll and the lower roll in the continuous casting machine, an upper moving frame that supports the upper rolls in an array, a lower fixed frame that supports the lower rolls in an array, and a nut in the lower fixed frame A column shaft that is screwed and fixed to the column shaft, and an upper moving frame that is incorporated so as to be guided to move up and down by the column shaft. A pair of hydraulic cylinders are arranged at the upper end of the column shaft. It is connected and integrated by a pair of joint frames, and after inserting a spacer between the upper moving frame and the lower fixed frame, the upper moving frame is lowered and the spacer is crimped to adjust the roll interval to an arbitrary thickness. When changing the roller apron interval of the continuous casting machine to be changed to, it is possible to carry in and out by interlocking the movement of the spacer on the lower fixed frame and the lifting and lowering operations Casting machine spacer exchange device for a roller apron interval changes.

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