JPS6040651A - Method for inserting dummy bar into curved type continuous casting machine from below - Google Patents

Abstract

PURPOSE:To lead smoothly a dummy bar into the guide roll arrays of a curved type continuous casting machine even if intermediate auxiliary guide rolls are not used in the stage of inserting said bar into said arrays from below by attaching a leading block to the front end of the dummy bar and rotating reverse pinch rolls to feed the dummy bar into the guide roll arrays. CONSTITUTION:A leading body 12A is bolted to the mounting seat body 12B of a head element 6 at the top end of a dummy bar 5 in the stage of inserting said bar 5 from below. Pinch rolls are rotated reverse to feed the bar 5 from below between guide rolls 2 arrays and is risen up to a prescribed position. The body 12A has a tapered guide surface 14 that can rise over the guide rolls 2 in the curved part. The leading body is thus smoothly led into the guide roll arrays without the need for approaching auxiliary guide rolls 11 to each other. When the head element 6 arrives at the prescribed position, the body 12A is removed and is exchanged with a head block 7 for receiving a molten metal to complete the insertion of the dummy bar. The need for the auxiliary guide rolls is eliminated and the mechanism is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for downwardly charging a dummy bar in a convex continuous casting machine in which a continuous slab is guided in a horizontal direction with 70 bends.

Figure J3 and Figure 2 provide an overview of the convex continuous casting machine.1.
Kite rolls 2 are arranged in a row in the lower part of the water-cooled mold 1, leading from a curved path to a horizontal path (continuously forming a guide path of 3 pieces). Roll 4 is included.

Before the start of casting Bn, a dummy bar 5 in which elements are connected in a chain shape to have flexibility is inserted into the roll row path, and a head block 7 is inserted into the head element 6.
The tundish 8 is removed and brought to a predetermined position in the mold 1, and pouring of molten steel from the tundish 8 is started. If the solidified part of the molten steel in the mold 1 binds to the head block 7, the pinch roll 4
is driven to continuously pull out the slab 3 from the mold 1 and guide it through the rows of rolls 2.4. Continuous slab 3 is solidified M3a
The molten metal 3b is surrounded by the molten metal 3b, and solidification progresses gradually during the transition. In order to facilitate the warp/υ bending of the continuous slab 3, a water-cooled mold 1' having a round surface shape as shown in FIG. 3 is sometimes used.

In many cases, the dummy par 5 is charged into an upper charging device using charging force or the like. In this case, as shown in FIG. 4, a tail block 10 with an inclined tip is permanently fixed to the sole member 1-9 at the lower end of the dummy par 5, so that the tail block 10 is fixed and permanently provided at the lower end of the dummy par 5. It progresses by overcoming roll 2, so there is no need to worry about charging.

However, in an emergency when a failure p+5 occurs in the upper charging device, it is necessary to charge the tummy bar 5 from below without delay, which necessitates one row of lower charging tools and one stage. in this case,
The binge roll 4 is driven to rotate in reverse, and the tummy bar 5 moves backward. In order to prevent the leading head element 6 or head block 7 from hitting and supporting the curved roll 2.4, a dummy par kite [1-ra 11 and roll 2] is installed separately from the guide roll 2. ．Established between 4 rooms ()
Under normal conditions, it is in the retracted position (see arrow a in Fig. 1) where it does not come into contact with the slab 3, but in an emergency for F-side charging, it is moved to the guiding position (see arrow a in Fig. 5). (The head element 6 or Iζ is brought into contact with the guide of the head block 7.

Although this tummy bar guide roller 11 is not used in the continuous casting process, it needs to be activated immediately in an emergency, and therefore constant maintenance is required, which is a heavy burden.

The present invention has been made in order to solve the problems of the prior art described above, and eliminates the need for the guide roller 11, which was conventionally indispensable for lower charging of the dummy bar of a curved continuous casting machine. In order to eliminate the negative effects caused by the dummy bar and to allow the downward charging dummy bar to proceed smoothly through the ringing path of the roll row, a leading block is attached to the head element 6 or head block 7, and downward charging is performed, and the charging is completed. After that, the leading block was removed and the head block 7 was made.

According to the above, the method for downward charging of dummy bars in one curved caster according to the present invention is such that the dummy bar is charged downwardly into the kite roll row of the curved caster. It is characterized by a removable leading block that can pass between adjacent rolls without getting stuck, allowing downward charging.

Hereinafter, the present invention will be explained in detail with reference to FIGS. 6 to 10. Figures 8116-8 show a representative example of leading block A3J used in carrying out the method of the present invention. Depending on the shape 'C
'l='i 1112 easily, quickly and reliably-)
It is necessary to In this example, the head J element 1-0 of the dummy bar 0 continues from the tip 6a of the W1 corner and faces the side corresponding to the outside of the curved path of the guide roll 2 (it has a shape with a receding inclined surface 6b). , C grooves 13a and 1311 are formed along these surfaces.

The leading block 12 is made up of two bodies: a leading body 12Δ having a guide surface 14 and a seat body 1213 having a guide surface 14. . (1 seat body 12B has a shape that fits the dovetail groove 13a) C11 does not shift to the inclined groove 13b of the lower pup j in the thorny state. On the other hand, the leading hole 12A has a rear surface shaped to fit the end face of the head corement 6, has a bolt hole 16, and has a bolt 15 lubricated with holes 1 to 7L16. By screwing 11 into 1, the 1 seat body 128 km is connected to the head element 6, and it is securely attached to the head element 6 without any play.

The dummy bar 6 can be smoothly loaded downward by passing over the leading 5 of the leading block 12 and the roll 2 of the curved passage. Then, as shown in FIG.
Change the setting to J, set as shown in Figure 2, and start pouring.

The head element 6' in FIG. 9 is an example having a straight groove 18 with a rectangular cross section on its flat end surface, and the head block 7' has a rectangular cross section that fits therein, but the leading block is Shape similar to Figures 6 to 8 and fit into groove 18 II
C-lock and apply tension bolts to secure. .

In Fig. 10, the heladite element h 6 '' has planes 9 and 11 (in this example, five bolt holes 19 are provided, and a stand-up bolt-like head block [cock 7'' is used. The leading block is It has a shape similar to that shown in Figs. 6 to 8 and is attached using the bolt hole 19.

As described above, according to the method of the present invention, downward charging of dummy bars into a curved continuous Uj machine can be carried out smoothly and quickly in the same manner as one-way charging, and downward charging of dummy bars in an emergency can be carried out. is possible. Because of the downward loading, the guide rollers 11 that are not regularly used, which were conventionally required, can be removed, and as a result, the guide rolls 2 can be placed close to each other.
, jl) Since no idle rollers are required, the equipment cost is low and there is no need for extra maintenance.

[Brief explanation of drawings]

Figure 1 is a side view of the convex continuous casting machine during continuous casting,
Figure 2 is a side view of the dummy bar setting, Figure 3 is a side view of the water-cooled mold, Figure 4 is a diagram of the operation of the Manozor block, and Figure 5 is a side view of the dummy bar charging process. Fig. 6 is a plan view of an example of the leading block used in the method of the present invention, Fig. 7 is a top view of the groove, and Fig. 8 is its longitudinal section III.
IJ plane view, FIG. 9 is a perspective view showing a partial example of the head element, and FIG. 10 is a perspective view showing still another example of the head element portion. 1.1'...Water-cooled mold, 2...Guide roll, 3.
... Continuous slab, 3a... Solidified shell, 3b... Bath temperature, 4
...Pinch roll, 5...Dummy bar, 6.6',
6"... Head element, 6a... Tip surface, 61
)...Slanted surface, 7.7', 7"...Head block L] Tsuk, 6a...Tandish, 9...Tail element, 10...Tail block, 11...Guide roller, 12... Leading block, 12△... Leading body,
12B...Mounting seat body, 13a, 13b...Dovetail groove,
14... Guide surface, 15... Mounting bolt, 16...
Bolt hole, 17... Nut, 18... Straight groove, 1
9...Pol 1 to hole, a, b...arrow.

Claims (1)

[Claims] In order to load the dummy bar downward into the guide roll row of the curved series*m, a leading block is attached to the head element or head block of the dummy bar so that it can pass between the adjacent rolls in the roll row without getting stuck. IJf
A method for downward charging of a tummy bar in a convex continuous casting machine, characterized in that the JZ can be freely attached to perform downward charging.