JP2991225B2 - On-machine dressing equipment for twin-drum continuous casting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to repair of a casting drum of a twin-drum continuous casting machine, and more particularly to an apparatus for cutting or grinding the surface of a drum online to finish quickly and accurately.

[0002]

2. Description of the Related Art In recent years, steel manufacturing processes have been reduced.
Thin slab production technology has been developed from the viewpoint of energy saving, and among them, twin-drum continuous casting has attracted attention. In the twin-drum continuous casting method, as shown in FIG. 4, a molten metal is poured between a pair of rotary cooling drums 2a and 2b whose axes are parallel to each other to form a pool 13, and the interval between the cooling drums is adjusted. And casting a slab of any thickness.

In such a technique, repairing a damaged portion due to abrasion of the drum surface is an operational problem. That is, sliding abrasion occurs due to direct contact of the drum body surface with the high-temperature molten metal, and side weirs 15a and 15b sealing the short side of the pool 13 at the end surface. Regarding the damage due to sliding between the casting cooling drum and the side weir, see JP-A-60-162558 and
Japanese Unexamined Utility Model Publication No. 60-136849 discloses a method for preventing wear of the drum and a method for preventing deposits on the drum surface.

Conventionally, molten steel easily penetrates into the gap between the end face of the drum and the side weir, and therefore, maintenance of the end face is important for the purpose of maintaining a seal. In repairing, the degree of repair varies depending on the condition of the surface of the drum, but a method of removing the drum from the main body frame, overlay welding the surface, and cutting with a large lathe has been used.

[0005] However, these repairs require a considerable amount of time, and all the cutting operations require skilled operators. Further, as a technique similar to the drum cutting technique, an online grinding apparatus such as a cold rolling roll is known. In the case of such a rolling roll, the grinding device is often incorporated in the rolling mill itself. However, in the case of a twin-drum continuous caster, the operating environment is high heat, and the atmospheric conditions are severe due to dust and the like, and the restrictions are large.
The conditions are completely different from those of cold rolling rolls, and have not yet been incorporated into the casting machine itself.

[0006] Therefore, conventionally, the processing and repair of the casting drum has been mainly performed by extracting the drum off-line and processing it, or manually by a skilled person. The former has a problem in efficiency and the latter has a problem in efficiency and accuracy.

[0007]

Conventionally, the repair of the drum surface has required a long time, and there has been a problem in finishing accuracy. The present invention is intended to solve such a problem, and provides an on-machine dressing apparatus having a structure which enables on-line machining of a casting cooling drum and does not impair the original function of a casting machine. The purpose is to:

[0008]

An on-machine dressing apparatus for a twin-drum continuous casting machine according to the present invention utilizes the rotation of the drum without removing the casting drum without removing the casting drum. In a device for surface cutting or surface grinding, a table moving device capable of moving in a drum axial direction and a radial direction, and a tool holding device for fixing a tool mounted on the table moving device are provided. The amount of cutting and the cutting speed, or the amount of grinding and the grinding speed can be controlled by the rotation of, further, in the present invention, the table moving device,
It is characterized in that it has a structure detachable from the casting machine body frame at a position facing the casting drum. In the tool holding device, a cutting unit that performs cutting of a drum or a grinding unit that performs grinding of a drum is fixed as a tool.

[0009]

According to the present invention, cutting or grinding is performed by using the rotation of the drum itself without removing the drum, and the cylindrical drum becomes the material to be cut or ground.
The cutting or grinding device is set to face the drum only during cutting or grinding, and is removed during non-cutting or grinding, and is compactly configured for easy attachment and detachment.

That is, the apparatus of the present invention is mounted on a frame constituted by a frame, and the frame is easily attached to the frame of the casting machine main body and is detachable, so that the two drums can be cut or ground simultaneously or individually. What you want to do. And, since the cutting or grinding of the entire drum surface can be performed with the optimal cutting amount or polishing amount and the cutting or grinding speed, the accuracy of the finished surface is improved,
In addition, the degree of finish can be made constant.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the drawings, taking the case of cutting as an example. Of course, the same applies to the case of grinding. FIG. 1 shows a state in which the on-machine dressing apparatus of the present invention is set on a casting drum at the time of cutting, FIG. 2 shows an upper structure thereof, and FIG. 3 shows one of two symmetric table moving apparatuses. First, a method of attaching the present device will be described. The present apparatus is carried by a crane or the like, and is set at a predetermined position on the casting machine body frame 3. At this time, the reference setting boards 4a and 4b having the positioning pins and the drum frame 3 make it possible to easily set the horizontal position with respect to the drums 2a and 2b.

When the setting on the main body frame 3 is completed,
In the state of FIG. 1 and FIG. 2, fixing is performed by bolts or the like, and cutting is started. Hereinafter, one of the two table moving apparatuses will be described. The cutting tool 12a is fixed to the cutting tool holding device 5a, and the cutting tool holding device is mounted on the table moving device 7a. As this cutting tool,
Various tools such as conventional cutting tools or grinders can be used.

As shown in FIG. 3, a cutting tool gripping device 5a
Drives the drive motor 9a and can be moved on the table in the radial direction of the drum by the table moving slide 8a. Similarly, it can be moved in the drum axis direction by a motor 11a and a moving slide 10a. The holding direction of the cutting tool can be changed at an angle of 90 °, and as shown in FIG. 3A when machining the drum surface, and as shown in FIG. 3B when machining the drum end surface. Set each tool.

That is, the present apparatus uses the casting drum itself as a workpiece to be cut, has a function similar to that of a normal lathe utilizing the rotation thereof, and has two sets of opposed drums of a twin-drum continuous casting machine. It has a cutting device that can be controlled independently with the same function. Further, the tool gripping device 5a can control the moving amount and the speed in the drum axis direction and the drum radial direction, and can set the cutting amount and the cutting speed to optimal conditions.

When the apparatus of the present invention was applied to the cutting of the end face of a casting drum of an actual twin-drum continuous casting machine, the finishing accuracy equivalent to that of off-line lathe processing was obtained, and the seal against the side dam was restored to its original state. It has become possible to prevent infiltration of molten steel. Further, the same cutting operation was performed on the drum body surface, and a flat circumferential surface in the drum axial direction and a uniform circumferential surface in the drum circumferential direction having a finishing accuracy equivalent to that of off-line lathing could be obtained. As a result, the thin slab obtained at the time of continuous casting has excellent surface properties comparable to conventional off-line lathe processing. In addition, when the machining tool was replaced with a grinding unit driven by an air motor and grinding of the drum was performed, finishing accuracy equivalent to that of off-line lathe machining was obtained as in the case of cutting.
In this embodiment, the control accuracy is improved by the pulse drive motor. However, another drive method may be adopted in accordance with the cutting accuracy.

[0016]

According to the present invention, a portable on-machine dressing apparatus is provided by employing a compact cutting device or grinding device utilizing the rotation of a casting drum, employing the above-described structure. Without impairing the original function,
Enables high-precision finishing and high-efficiency machining of the casting drum surface online.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a dressing device according to the present invention.

FIG. 2 is a schematic front view of a dressing device according to the present invention.

FIGS. 3A and 3B are schematic side views of a dressing device according to the present invention, wherein FIG. 3A is a diagram showing a body surface and FIG.

FIG. 4 is a schematic configuration diagram of a drum unit of the twin-drum continuous casting machine according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... On-machine dressing apparatus frame 2a, 2b ... Casting cooling drum 3 ... Casting machine main body frame 4a, 4b ... Reference setting base 5a, 5b ... Cutting tool gripping device 6a, 6b ... Hanging hook 7a, 7b ... Table moving device 8a, 10a: moving slide 9a, 11a: drive motor 12a: cutting tool 13: molten steel pool 14: slab 15a, 15b: side dam

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor ▲ Yoshimura Yuji 3434 Shimada, Hikari-shi, Yamaguchi Prefecture Inside Nippon Steel Corporation Hikari Works (56) References JP-A-6-114507 (JP, A JP-A-4-66247 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B22D 11/06 330 B24B 5/37

Claims (3)

(57) [Claims] 1. An on-machine dressing apparatus for cutting or grinding the surface of a casting drum end face and a body surface of a twin-drum continuous casting machine by using the rotation of the casting drum without removing the casting drum. A table moving device capable of moving in a casting drum axial direction and a radial direction,
A tool gripper for fixing a tool mounted on the table moving device, wherein a cutting amount and a cutting speed or a grinding amount and a grinding speed can be controlled by moving the table and rotating the casting drum. On-machine dressing equipment for twin-drum continuous casting machine. 2. The on-machine dressing device of a twin-drum continuous casting machine according to claim 1, wherein a cutting unit for performing a cutting process on the drum or a grinding unit for performing a grinding process on the drum is fixed to the tool holding device. 3. An on-machine dressing apparatus for a twin-drum continuous casting machine according to claim 1, wherein the table moving device is detachably mounted on the casting machine main body frame at a position facing the casting drum.