JP2892072B2 - Guide for forging of slab strands - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a forging process in which a slab strand obtained by continuous casting is subjected to a forging process effective in improving the internal quality near a solidification completion point of the slab strand. The present invention relates to a guide suitable for being installed in an apparatus used for processing.

(Conventional technology) Numerous proposals have been made for the technology of forging working by reciprocatingly driving a pair of anvils sandwiching a conveying path line in the vicinity of a solidified region of a slab strand drawn from a continuous casting mold. Can be seen
-183765, reference). By the way, when performing forging with such an apparatus, when a bend or the like occurs in the slab strand from the continuous casting mold to the forging apparatus, a predetermined area cannot be processed, and there is a possibility that defective slab may be generated. there were.

Here, in order to prevent the bending of the slab strand in the drawing process, a guide may be provided upstream of the forging device so as to sandwich the same in the width direction. It is conceivable that the cooling water is directly sprayed on the guide, but the cooling of such a guide, when the cooling water is applied to the slab strand, has an adverse effect on the quality depending on the type of steel. In some cases, there was no effective means at present.

(Problems to be Solved by the Invention) It is an object of the present invention to propose a novel forging process guide capable of guiding and guiding a slab strand to a forging device without the disadvantages described above. .

(Means for Solving the Problems) The present invention guides a slab strand drawn from a continuous casting mold to a forging machine equipped with a reciprocating drive type anvil vertically sandwiching a conveying path line of the slab strand. In the guide to be guided, the guide has at least one pair of internally-cooled guide rollers sandwiching the conveying path line of the slab strand on at least one of the exit side and the entrance side of the forging device, This is a guide for forging working of a slab strand to be formed. Here, as the internal air-cooled guide roller, a cooling groove for supplying cooling water to a roller body of the guide roller is formed, and the roller body is
It is preferable to provide a water supply pipe for supplying cooling water into the groove and an overflow pipe for keeping the level of the cooling water supplied into the groove constant.

FIGS. 1 (a) and 1 (b) show an example in which a guide according to the present invention is installed on the entry side of a forging machine. In the figure, reference numeral 1 denotes a slab strand; The anvil 2 is connected to a driving device, and its operation repeats the reciprocating movement of approaching / separating as shown by the arrow in the figure, and the vicinity of the solidification completed area of the slab strand 1. Is forged. 3 is the slab strand 1 at the entry side of the forging machine.
The guide roller 3 is provided with a push rod b on a support rod r having, for example, a grease supply hole g as shown in FIG. And held rotatably. Here, a cooling water circulation system r 'can be provided on the support rod r for more effective forced cooling of the guide roller. The roller body 3a of the guide roller 3 has a cooling groove n for storing cooling water and an overflow pipe m for maintaining the cooling water supplied thereto at a predetermined level (the cooling water discharged from the cooling groove is a slab strand. Fall without taking on)
The cooling water supplied from the water supply system 4 is stored to cool the guide roller 3.

(Action) In the structure where a roll type guide is provided on the entry side of the forging device and the roll guides and guides while always restraining both sides of the slab strand, the roll is affected by the heat of the slab strand. Wear is severe and the life of the guide is extremely short. On the other hand, in a structure in which the roller interval L of the guide is somewhat larger than the width l of the slab strand and the roller hits the left or right roller only when the strand is bent, a guide of the type described above is used. However, when the period during which the roller does not rotate is long, the grease injected into the bearing (push b) of the roller burns due to the heat of the strand, making it impossible to rotate. Here, when the slab strand comes into contact with the slab strand, there is a possibility that scratches may occur in the contact area of the strand. In the guide of the present invention, since the inside of the guide roller 3 is always cooled, the roller 3 is always cooled even if the roller interval between the guide rollers 3 is set to be somewhat wider than the width of the slab strand 1. As a result, the grease in the bearing portion of the roller 3 does not seize, so that the slab strand can be stably guided and guided to the forging machine for a long period of time.

In the example shown in FIG. 1 described above, the bracket 5 holding the guide roller 3 is shown as being fixed to the forging of a forging machine, etc., but the evacuation device including the link mechanism and the actuator is mounted on the bracket 5. If it is provided, there is an advantage that the roller interval of the guide roller 3 can be appropriately adjusted.

(Effects of the Invention) Thus, according to the present invention, abnormal forging pressure caused by bending in the process of drawing a slab strand can be prevented, so that defective slabs which may be generated during forging can be significantly reduced. Further, according to the present invention, since the structure of the guide is simple, maintenance can be performed easily, and the present invention can be applied to existing equipment without major modification.

[Brief description of the drawings]

1 (a) and 1 (b) are explanatory views of the configuration of a guide according to the present invention, and FIG. 2 is a sectional view of a main part of a guide roller. DESCRIPTION OF SYMBOLS 1 ... Cast strand 2 ... Anvil 3 ... Guide roller 3a ... Roller body 4 ... Water supply pipe 5 ... Bracket r ... Support rod, r '... Cooling water circulation system n ... Cooling groove , M: Overflow piping g: Grease supply hole

Claims (2)

(57) [Claims] 1. A slab strand drawn from a continuous casting mold is guided to a forging machine equipped with a reciprocating drive type anvil for vertically sandwiching a conveying path line of the slab strand.
In the guide to guide, the guide sandwiches the conveying path line of the slab strand at least on one side of the exit side and the entry side of the forging device,
A slab strand forging guide comprising at least a pair of internally cooled guide rollers. 2. A cooling groove for supplying cooling water to a roller body of a guide roller, and a water supply pipe for supplying cooling water in the groove and a level of the cooling water supplied to the groove are kept constant. The forging guide according to claim 1, further comprising an overflow pipe for retaining.