JPH0532190B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a support device for a ground slab in equipment for cleaning surface flaws on a hot slab using a traveling grinder.

(B) Prior art In equipment where a hot slab is placed on a conveyor roller and conveyed to a flaw cleaning position, and a traveling grinder is used to clean the surface of the slab for flaws, the conveyor roller is used to clean the slab flaws. A slab support device is provided for transferring slabs to and from the slab.

When a slab is transported within the running range of the grinding machine, even if the table of the transport roller is provided with a side guide, the trajectory of the grinding wheel and the slab to be ground will be different. The surfaces are often not parallel. If the grinding continues in this state, the grinding wheel will come off the grinding surface of the slab, which may not only cause deep grinding scratches on the end face of the slab, but also lead to an accident in which the grinding wheel breaks. For this purpose, the grinding wheel is generally repositioned by rehanging it using a crane equipped with a refmag, or the grinding machine is equipped with an end face detector, and the grinding wheel is moved while being ground by a small device. When using a crane with a riffmag,
It is cumbersome to operate. In particular, magnets cannot be used for hot slabs at temperatures above the magnetic transformation point (approximately 730°C or higher). This makes the operation more cumbersome, takes time for positioning, and forces the use of tongs, etc., which leads to a drop in slab temperature.

In the case of cold slabs, it is technically possible to use a small device, ignoring the high cost, but in the case of hot slabs, the accuracy of slab position detection and the heat resistance durability of the detector are important. There was a problem.

Continuously cast slabs include so-called tapered slabs whose width is changed during casting. When casting the tapered part, the casting speed is changed and distortion is applied to the edge of the slab, so flaws are likely to occur. Therefore, compared to the stationary part, the cleaning ratio by the grinder is also higher. Even if one end of the tapered slab is aligned with the trajectory of the grinding wheel of the grinding machine, the other end must be repositioned again unless a special device is used. In particular, in the case of hot slabs, it is necessary to minimize the drop in slab temperature during grinding to save fuel in the heating furnace. Furthermore, as the slab temperature decreases, the grinding resistance increases, and the amount of slab grinding per unit consumption of the grindstone decreases, leading to an increase in grinding costs, so it is necessary to reduce the overall grinding time.

Therefore, tapering can be easily done in an extremely short time.
It is necessary to position the slab.

Further, when grinding the upper surface of the slab, the pressing force of the grinding wheel is supported by the slab holder, so the slab does not move. However, when grinding the end face of a slab, the slab may move due to the pressing force of the grindstone. Particularly in the case of narrow, lightweight slabs, slab movement is likely to occur. It is necessary to prevent such a situation from occurring.

JP-A-52-147395 discloses a scratch removal grinder in which the angle of inclination of the whetstone can be freely changed. However, the slab position remains unchanged.

Japanese Unexamined Patent Publication No. 60-39008 discloses an apparatus for removing surface flaws from a steel billet by using a roller table that can follow the bending or meandering of the steel billet. However, the position of the steel piece remains unchanged.

(c) Problem to be solved by the present invention The problem to be solved by the present invention is to roughly position the slab grinding part in accordance with the movement locus of the grinding machine, and in particular to efficiently position the tapered slab. , to prevent movement of the slab during grinding.

(d) Means for solving the problem The grinding slab support device of the present invention transports the hot slab to a flaw cleaning position by placing it on a transport roller,
In equipment for cleaning defects on the surface of the slab using a traveling grinder, a slab pedestal that is disposed between the conveyance rollers and supports the slab so that the slab can be transferred to and from the conveyance rollers; a pedestal drive mechanism that raises and lowers the slab pedestal in a direction perpendicular to the slab plane and moves it back and forth in the width direction of the slab; and a slab pedestal that is attached to a machine frame independent of the slab pedestal and that rests on the conveyance roller. The above problem is solved by providing a slab position adjustment mechanism that adjusts the width direction position of the slab.

In addition to the above configuration, the present invention also solves the above problem by providing a positioning stopper that is attached to the slab holder and that works in conjunction with the slab position adjustment mechanism to restrain movement of the slab in the width direction. has been resolved.

(E) Embodiments An embodiment of the grinding slab support device of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic plan view of a slab flaw care facility. The hot slab 1 is placed on conveyance rollers 2 and conveyed to the illustrated flaw cleaning position. The support device 3 of the present invention positions and supports the slab, and a conventional traveling grinder 4 cleans the surface of the slab for defects.

FIG. 8 shows the case of cleaning a tapered slab 1α for defects. In this case, as will be described in detail later with reference to FIGS. 9 and 10, the positioning stopper 34 provided on the support device 3 positions the tapered slab 1α.

FIG. 2 is a front view of the grinding slab support device of the present invention. The grinding slab support device 3 of the present invention includes:
It consists of a slab pedestal 31, a pedestal drive mechanism 32, and a slab position adjustment mechanism 33. A positioning stop 34 (FIG. 10) is further provided for cleaning the tapered slab 1α.

The slab holder 31 is disposed between the conveyance rollers 2 and supports the slab 1 so that the slab 1 can be transferred to and from the conveyance rollers 2.

The pedestal drive mechanism 32 receives the slab pedestal 31 and moves the pedestal 31 up and down in a direction perpendicular to the slab plane or back and forth in the width direction of the slab. As shown in detail in FIG. 7, the pedestal 31 is raised and lowered by a conventional link mechanism 322 that operates in conjunction with a fluid pressure cylinder 321. The pedestal 31 is moved back and forth by a fluid pressure cylinder 323.

The slab position adjustment mechanism 33 is attached to a machine frame independent of the slab pedestal 31, and adjusts the widthwise position of the slab on the conveyance roller 2. In this mechanism 33, a positioning arm 332 is swingably attached to a cart 331 running on a machine frame, and a fluid pressure cylinder 333 controls the swinging of the positioning arm 332, and a fluid pressure cylinder 334 controls the movement of the cart 331. Perform each run.

The positioning stopper 34 is shown in FIGS. 9 and 10.
As shown in the figure, it is attached to the slab pedestal 31 and works in conjunction with the slab position adjustment mechanism 33 to restrain movement of the slab in the width direction. This mechanism 34 uses a fluid pressure cylinder 342 to swing a stopper arm 341 that is swingably attached to the slab pedestal 31 .

Next, the operation of the grinding slab support device of the present invention will be explained. As shown in FIGS. 1 and 2, when ready to receive the slab 1, the positioning arm 332 is placed on standby below by the pass line of the conveying roller 2 so as not to interfere with the slab 1.

FIG. 3 shows the end surface A side of the slab 1 in the longitudinal direction,
In order to match the locus of movement of the grinding wheel in a direction perpendicular to the drawing, the positioning arm 332 is moved by the hydraulic cylinder 3.
32 is shown. As shown in FIG. 1, the positioning arm 332 is provided at two locations, both of which are stopped at the stroke end of the cylinder. As shown in FIG.
By installing the cylinder 333 so that the intersection point P between the upper surface of the roller 2 and the upper surface of the roller 2 is at a fixed position, the cylinder 333 is pushed up and the slab 1 is slid on the roller 2, thereby easily aligning the end surface A of the slab to the point P. can do.

Further, when the width of the slab is narrow and the positioning arm does not come into contact with the end face A of the slab, it is sufficient to move the entire body by a certain distance using a hydraulic cylinder 334 installed horizontally.

FIG. 4 shows a state in which the slab 1 is raised on the slab pedestal 31 after the end face A of the slab has been positioned. The slab pedestal 31 has a cylinder 321 and a link 3
22. At this time, in preparation for the grinding work of the slab end face B, the slab 1 is made to protrude from the slab holder 31 by a distance L in advance. distance L
is usually preferably about 50 to 300 mm, and accuracy is not required.

FIG. 5 shows how the slab pedestal 31 is connected to the
23 shows the state where the slab has been moved to the grinding position. In this state, the top surface of the slab is first ground using the grinding machine 4.

FIG. 6 shows that the positioning arm 332 is actuated by the horizontal movement cylinder 334, and the arm 332 is
It shows the state in which it is in contact with the slab end surface A. The output of the horizontal movement cylinder 344 is 150~ of the grindstone pressing force.
If it is 200%, it will support slab 1 and at the same time,
The friction force between the slab 1 and the slab holder 31 is overcome, and the slab 1 is not pushed toward the grinding wheel. The pressing force can be easily adjusted steplessly by adjusting the fluid pressure.

FIG. 10 shows the grinding work of the upper surface of the slab on the end surface B side and the end surface B after positioning the tapered slab end surface A and grinding the upper surface of the slab on the end surface A side. A stopper arm 341 is pressed against the end surface B side using a cylinder 341. In this case, either increase the fluid pressure higher than that shown in FIG. 10 and give the cylinder 334 enough power to move the slab, or
Or cylinder 32 for horizontal movement of slab pedestal 31
All you have to do is apply backward pressure to 3.

(F) Effects According to the present invention, positioning work for slab grinding can be performed accurately in a short time. The support device of the present invention can be applied not only to hot slabs but also to cold slabs.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of the slab flaw care equipment.
FIG. 2 is a front view of the grinding slab support device of the present invention. 3 to 6 are similar drawings to FIG. 2 and show the order of operation. FIG. 7 is an enlarged perspective view of a part of the cradle drive mechanism. FIG. 8 is a drawing similar to FIG. 1 and shows a tapered slab flaw care facility. FIG. 9 is a side view of FIG. 8. FIG. 10 is a drawing similar to FIG. 3 and shows another embodiment. 1: Slab, 1α: Tapered slab, 2: Conveyance roller, 3: Grinding slab support device, 4: Grinding machine, 31: Slab pedestal, 32: pedestal drive mechanism, 3
3: Slab position adjustment mechanism, 34: Positioning stopper.

Claims (1)

[Scope of Claims] 1. In a facility for carrying a hot slab on conveying rollers to a flaw cleaning position and cleaning the surface of the slab for flaws using a traveling grinder, the hot slab is placed between the conveying rollers. A slab pedestal that supports the slab so that the slab can be delivered to and from the conveyance roller, and a pedestal drive mechanism that moves the slab pedestal up and down in a direction perpendicular to the slab plane and back and forth in the width direction of the slab. and a slab position adjustment mechanism that is attached to a machine frame independent of the slab pedestal and adjusts the widthwise position of the slab on the conveyance roller. 2. In equipment in which a hot slab is placed on conveyance rollers and conveyed to a flaw cleaning position, and a traveling grinder is used to clean the surface of the slab for flaws, the hot slab is placed between the conveyance rollers and is placed between the conveyance rollers. a slab pedestal that supports the slab so that the slab can be delivered and delivered; a pedestal drive mechanism that moves the slab pedestal up and down in a direction perpendicular to the slab plane and back and forth in the width direction of the slab; and the slab pedestal. a slab position adjustment mechanism that is attached to a machine frame independent from the machine frame and adjusts the widthwise position of the slab on the conveying roller; and a slab position adjustment mechanism that is attached to the slab pedestal and works in conjunction with the slab position adjustment mechanism to A support device for a grinding slab consisting of a positioning stopper that restrains movement in the width direction.