JPH0133255Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a continuous casting machine equipped with a guide device for guiding a top-loading type twin or triple casting dummy bar after passing through a mold.

[Problems of the conventional technology that should be solved by the invention]

As shown in FIGS. 1 to 3, the top loading type twin or triple casting dummy bar 7 is pinched between the driving roll 2A and non-driving roll 2B of the guide roll 2, and the pulling force is applied by the driving roll 2A. The structure is such that it gives When applying a pulling force to this dummy bar 7, the cylindrical roll 2A,
Since 2B rotates while being bent into a concave crown shape,
The dummy bars 7 meander by moving toward each other (towards the center of the roll). When the dummy bar 7 meanderes, the slab 6 connected to it and pulled out also bends, so that the slab 6 cannot be cut at right angles in the cutting process subsequent to the straightening rolls 5. In addition, when hanging the hook for storing the dummy bar,
The tail portion of the dummy bar 7 may not be reliably caught on the hook, and casting may be forced to be interrupted.

Therefore, in order to prevent the dummy bar from meandering, a method has recently been developed in which the tail part of the dummy bar is inserted into the mold from above and connected with a connecting device after passing through the mold, and the dummy bar is pulled out as a single unit. However, the structure was complicated, the dummy bar meandering prevention was indirect and unreliable, and the equipment cost was high.

[Purpose of invention]

The present invention was devised to solve the above-mentioned conventional problems, and unlike the conventional dummy bar meandering prevention method, the present invention directly prevents dummy bar meandering by using a simple engagement structure in the drive roll, thereby achieving a prevention effect. It's about making sure.

[Structure of the idea]

The continuous casting machine of the present invention is equipped with a top charging dummy bar guide device in which a dummy batten is provided with a protrusion extending along the chain longitudinal direction, and an arbitrary drive roll is provided with an annular guide groove that engages with the protrusion. It is characterized by:

〔Example〕

Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 4 to 8. In the figures, 1 is a mold for twin or triple casting, 2 is a guide roll,
3 is a pinch roll, 4 is a roller table, and 5 is a straightening roll, which are configured to be able to cast two or three slabs 6 in one strand. Also, 7 is a dummy bar, 8 is a dummy bow inch, 9 is a dummy bunker, and the dummy bar 7 is loaded on the dummy bucker 9.
was charged into the mold 1 and the guide roll 2 by the feeding device 10 provided on the dummy bar 9, and the dummy bar 7 was pulled out by applying a pulling force by the drive roll 2A in the guide roll 2, and the dummy bar 7 was removed from the straightening roll 5. Hook the tail part of the dummy bar 7 onto the hook 11 of the dummy bow inch 8, and attach the dummy bar 7 to the slab 6.
After being separated from the dummy bar, it is lifted up by a dummy bow winch 8, transferred onto a dummy barber 9 by a feeding device 10, and then kept on standby until the dummy bar is loaded.

The dummy bar 7 is formed by attaching a dummy bar head 7B to one end of a dummy bar chain 7A in which links 12 are connected by pins 13.

The drive roll 2A in the guide roll 2 is located on the inner side of the slab pass line, and has a configuration in which it can be moved back and forth by a pressing cylinder 14 so as to be able to press against a non-drive roll 2B arranged opposite to the drive roll 2A. It's summery. Further, the roll interval l between the opposing non-driving rolls 2B is
The thickness is larger than the thickness l' of A.

The feature of the present invention is that in such a continuous casting machine, a protrusion 15 having a rectangular cross section along the longitudinal direction of the chain is provided on the link 12 of the dummy bath chain 7A, and the protrusion 15 is engaged with any drive roll 2A. An annular guide groove 16 is provided to connect the protrusion 15 and the guide groove 1.
6, the dummy bath chain 7A is engaged with the drive roll 2A, and the drive rolls 2 are arranged opposite to each other.
The purpose is to prevent the dummy bar from meandering due to bending of the roll A and the non-driving roll 2B.

In order to further ensure the meandering control of the dummy bath chain 1A, it is preferable that both sides of the protrusion 15 and the guide groove 16 be tapered to have a trapezoidal cross section, as shown in FIG.

[Effect]

When the dummy bar 7 is inserted into the mold 1 and the guide roll 2, the drive roll 2A having the guide groove 16 engages the protrusion 15 of the dummy bar chain 7A with the guide groove 16 and is moved by these side guides. The link 1 of the dummy bath chain 7A is prevented from moving toward the center of the roll.
2 surface and rotate, said dummy bath chain 7A
move.

Therefore, the dummy bar 7 is accurately moved along each slab pass line by the drive roll 2A in the guide roll 2, and during the movement process, the protrusion 15 provided on the dummy bar 7 is located on the drive roll 2A side. It does not come into contact with the non-driven roll 2B.

[Effect of idea]

As described above, the present invention is configured to directly prevent the dummy bar from moving toward the center of the roll between the opposing drive roll and non-drive roll of the guide roll, so it is possible to reliably prevent the dummy bar from meandering. However, since the dummy bath chain is only provided with a protrusion and the drive roll is provided with an annular guide groove so as to engage with each other, the structure is simple and the equipment cost is low. Moreover, it can be easily applied to existing continuous casting machines.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the charging state of the dummy bar in a conventional continuous casting machine, Fig. 2 is an enlarged sectional view showing the squeezing state of the dummy bar located between the driving roll and the non-driving roll of the guide roll, and Fig. 3 The figure is a view taken in the direction of the − arrow in FIG. 2, FIG. 4 is a schematic diagram of a continuous casting machine showing an embodiment of the present invention, and FIG. FIGS. 6 and 7 are enlarged cross-sectional views showing the pressure situation, and FIGS. 6 and 7 are respectively cross-sectional views along the line - in FIG. be. 1...Mold, 2...Guide roll, 2A...
... Drive roll, 2B ... Non-drive roll, 3 ... Pinch roll, 4 ... Roller table, 5 ... Straightening roll, 6 ... Slab, 7 ... Dummy bar, 7A ...
Dummy bow inch, 8...Dummy bow inch, 9
...Dummy baker, 10...Feeding device, 11...
...Hook, 12...Link, 13...Pin, 14
...Press cylinder, 15... Protrusion, 16... Guide groove.

Claims (1)

[Scope of utility model registration request] In a continuous casting machine that casts a plurality of slabs in one strand, a dummy bath chain is provided with a protrusion along the longitudinal direction of the chain, and an arbitrary drive roll is provided with an annular guide groove that engages with the protrusion. A continuous casting machine equipped with a guide device for a top-charging dummy bar.